CN109595157B

CN109595157B - Pump body structure of rotary cylinder piston compressor and rotary cylinder piston compressor

Info

Publication number: CN109595157B
Application number: CN201811544546.8A
Authority: CN
Inventors: 魏会军; 胡余生; 徐嘉; 李直; 杜忠诚; 杨森; 任丽萍; 梁社兵; 张荣婷; 史正良; 丁宁; 刘一波; 郭霜; 廖李平
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority date: 2018-12-17
Filing date: 2018-12-17
Publication date: 2024-10-22
Anticipated expiration: 2038-12-17
Also published as: CN109595157A; WO2020125093A1

Abstract

The invention provides a pump body component of a rotary cylinder piston compressor and the rotary cylinder piston compressor, the pump body component of the rotary cylinder piston compressor comprises: the rotating shaft comprises a shaft body and a shaft inner hole arranged in the shaft body, and the shaft inner hole extends along the axial direction of the shaft body; the shaft body is provided with a shaft matching part matched with the piston, the peripheral wall of the shaft matching part is provided with two oppositely arranged first planes, and the rotating shaft reciprocates relative to the piston along the direction parallel to the first planes; at least one shaft oil hole is arranged between the hole wall of the shaft inner hole and the first plane in a penetrating way; the piston is provided with a rotating shaft mounting hole which is suitable for a rotating shaft to pass through, the hole wall of the rotating shaft mounting hole is provided with two second planes which are oppositely arranged, and the second planes are matched with the first planes on the corresponding sides; and the shaft oil groove is arranged on at least one first plane and extends along the axial direction of the shaft body, and is communicated with the shaft oil hole. The invention can lubricate the rotating shaft and the piston better, and reduce the abrasion between the rotating shaft and the piston.

Description

Pump body structure of rotary cylinder piston compressor and rotary cylinder piston compressor

Technical Field

The invention relates to the technical field of compressors, in particular to a pump body structure of a rotary cylinder piston compressor and the rotary cylinder piston compressor.

Background

The rotary cylinder piston compressor is a compressor with a brand new structure, and is essentially a compressor which is obtained by combining a main structure of a piston compressor with a main structure of a rotor compressor by adopting a cross slide block structure principle. The existing rotary cylinder piston compressor comprises a rotating shaft, a piston sleeved outside the rotating shaft and a cylinder sleeved outside the piston; referring to fig. 1, O1 is the center of the rotation shaft, O2 is the center of the cylinder, e is the center of the circle distance, and square is the center of mass of the piston. When the rotating shaft rotates, the piston is driven to perform circular motion, the distance between the piston and the center of the cylinder is in the range of 0-e, the rotating shaft and the cylinder are eccentrically assembled, the rotating shaft drives the cylinder to rotate through the piston, and the rotating shaft and the cylinder respectively rotate around the respective axes when in operation due to the eccentric relation of the rotating shaft and the cylinder, and the piston performs reciprocating motion relative to the cylinder, so that gas compression is realized.

In the above-mentioned rotary cylinder piston compressor, the rotary shaft is provided with an inner hole extending in the axial direction and at least one oil supply hole extending in the radial direction, and the oil supply hole penetrates to the outer peripheral wall of the rotary shaft along the hole wall of the inner hole so as to lubricate the movement between the rotary shaft and the piston by supplying the oil from the inner hole to the matching position of the rotary shaft and the piston. This form of lubrication has a relatively limited effect on lubrication between the shaft and the piston.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defect that the lubricating effect between the rotating shaft and the piston in the rotating cylinder piston compressor in the prior art is limited, so as to provide a pump body structure of the rotating cylinder piston compressor with good lubricating effect between the rotating shaft and the piston and the rotating cylinder piston compressor.

The invention provides a pump body structure of a rotary cylinder piston compressor, which comprises:

The rotating shaft comprises a shaft body and a shaft inner hole arranged in the shaft body, and the shaft inner hole extends along the axial direction of the shaft body; the shaft body is provided with a shaft matching part matched with the piston, the peripheral wall of the shaft matching part is provided with two oppositely arranged first planes, and the rotating shaft reciprocates relative to the piston along the direction parallel to the first planes; at least one shaft oil hole is arranged between the hole wall of the shaft inner hole and the first plane in a penetrating way;

the piston is provided with a rotating shaft mounting hole which is suitable for the rotating shaft to pass through, the hole wall of the rotating shaft mounting hole is provided with two second planes which are oppositely arranged, and the second planes are matched with the first planes on the corresponding sides;

and the shaft oil groove is arranged on at least one first plane and extends along the axial direction of the shaft body, and the shaft oil groove is communicated with the shaft oil hole.

The shaft oil groove extends from one end of the first plane to the other end.

The shaft oil groove is in a straight line shape.

A plurality of shaft oil holes are formed between the hole wall of the shaft inner hole and the corresponding first plane.

And each first plane is respectively provided with at least one shaft oil groove.

And each first plane is provided with one shaft oil groove.

The shaft oil groove is eccentrically arranged on the first plane.

In the process that the rotating shaft drives the piston to rotate, a region moving towards the corresponding second plane on the first plane is a shaft matching bearing region, a region moving away from the corresponding second plane is a shaft matching non-bearing region, and the shaft oil groove is formed in the shaft matching non-bearing region.

The shaft oil hole extends in a radial direction of the shaft body.

Further comprises:

The cylinder is sleeved outside the piston and is provided with a piston mounting hole suitable for mounting the piston, and the piston is suitable for reciprocating in the piston mounting hole relative to the cylinder;

A cylinder liner, a cylinder mounting cavity adapted to mount the cylinder, the cylinder being adapted to rotate in the cylinder mounting cavity relative to the cylinder liner.

The cylinder includes:

the cylinder body is provided with the piston mounting hole in a penetrating manner on the peripheral wall of the cylinder body;

At least one cylinder oil guide hole penetrates through the hole wall of the piston mounting hole and extends to the outer peripheral surface of the cylinder.

The cylinder sleeve is provided with an air suction port communicated with the cylinder installation cavity, and the cylinder oil guide hole and the air suction port are staggered.

The piston is provided with a rotating shaft mounting hole which is suitable for the rotating shaft to pass through, the side wall of the piston corresponding to the air cylinder oil guide hole is provided with at least one oil outlet, and the oil outlet extends from the hole wall of the rotating shaft mounting hole to the outer peripheral surface of the piston.

The cylinder liner is characterized by further comprising two end face matching structures which are respectively arranged at two ends of the cylinder and connected to the cylinder liner.

The cylinder liner also comprises at least one clearance structure, wherein the clearance structure is arranged on at least one end face of the end face matching structure facing the cylinder or on at least one end face of the cylinder and the cylinder liner; the clearance structure comprises at least one oil drain groove, wherein the oil drain groove extends from the inner peripheral surface of the end surface matching structure to the outer peripheral surface of the end surface matching structure, or extends from the inner peripheral surface of the cylinder corresponding to the end surface matching structure to the outer peripheral surface of the cylinder sleeve.

The clearance structure is arranged on at least one end face of the end face matching structure, which faces the end face of the cylinder, and the oil drain groove extends from the inner peripheral surface of the end face matching structure to the outer peripheral surface of the end face matching structure.

The clearance structure further comprises at least one clearance groove which extends along the circumferential direction of the end face matching structure and is communicated with the oil drain groove.

The cylinder sleeve is provided with an exhaust port communicated with the cylinder mounting cavity; the end face of the cylinder is provided with a first matching part, and the first matching part has a trend of moving towards the corresponding end face matching structure under the pressure action of the exhaust port;

The position of the end surface matching structure, which faces the first matching part, on one side surface of the air cylinder is provided with a second matching part, at least one second matching part of the end surface matching structure is provided with at least one pressure groove, and the pressure groove is suitable for introducing pressure oil and/or pressure gas so that the movement trend of the first matching part towards the corresponding end surface matching structure is reduced or eliminated.

Be equipped with the pivot hole on the cylinder, pump body structure still includes:

The inner circular matching structure comprises a matching body and a boss extending from the matching body; the boss is suitable for being stretched into the rotating shaft hole and matched with the hole wall of the rotating shaft hole; the maximum length of the matching body in the cylinder radial direction is larger than the aperture of the rotating shaft hole; the cylinder rotates relative to the inner circular matching structure;

the inner circular matching oil guide groove is arranged on the outer circumferential surface of the boss, and extends from one end of the boss away from the matching body to the matching body; or the inner circular matching oil guide groove is arranged on the hole wall of the rotating shaft hole, and extends from the hole wall of the piston mounting hole to the outer end surface of the cylinder.

The device also comprises an annular inner circular matching oil storage tank, wherein the inner circular matching oil storage tank is arranged on the outer peripheral surface of the boss and/or the hole wall of the rotating shaft hole; the inner circular matching oil storage tank is communicated with one end, far away from the matching body, of the inner circular matching oil guide tank.

The inner circular matching oil drain hole is formed in the matching body, penetrates through the through hole of the matching body along the axial direction, and is communicated with one end, away from the piston mounting hole, of the inner circular matching oil guide groove.

The cylinder comprises a cylinder body and a protruding shaft extending outwards from at least one end of the cylinder body, wherein the protruding shaft is provided with a rotating shaft hole and at least one protruding shaft oil guide hole; the rotating shaft hole is suitable for installing a rotating shaft; the convex shaft oil guide hole penetrates through the side wall of the convex shaft and is communicated with the rotating shaft hole; the pump body structure further includes:

At least one outer circular matching structure, wherein the outer circular matching structure is provided with a matching hole suitable for being filled in the convex shaft; the aperture of the matching hole is smaller than the outer diameter of the cylinder; the cylinder rotates relative to the excircle matching structure;

The outer circle matching oil guide groove is arranged on the hole wall of the matching hole, and extends from the hole wall of the matching hole to one end far away from the cylinder body towards one end of the cylinder body; or the excircle matching oil guide groove is arranged on the outer peripheral surface of the protruding shaft, and one end connected with the cylinder body by the protruding shaft extends to one end far away from the cylinder body.

The device also comprises an annular external circular matching oil storage tank, wherein the external circular matching oil storage tank is arranged on the hole wall of the matching hole and/or the outer circumferential surface of the protruding shaft; the excircle matching oil storage tank is communicated with one end of the excircle matching oil guide tank, which faces the cylinder body.

The invention also provides a rotary cylinder piston compressor, which comprises the pump body structure of the rotary cylinder piston compressor.

The technical scheme of the invention has the following advantages:

1. The invention provides a pump body structure of a rotary cylinder piston compressor, which comprises: the rotating shaft comprises a shaft body and a shaft inner hole arranged in the shaft body, and the shaft inner hole extends along the axial direction of the shaft body; the shaft body is provided with a shaft matching part matched with the piston, the peripheral wall of the shaft matching part is provided with two oppositely arranged first planes, and the rotating shaft reciprocates relative to the piston along the direction parallel to the first planes; at least one shaft oil hole is arranged between the hole wall of the shaft inner hole and the first plane in a penetrating way; the piston is provided with a rotating shaft mounting hole which is suitable for the rotating shaft to pass through, the hole wall of the rotating shaft mounting hole is provided with two second planes which are oppositely arranged, and the second planes are matched with the first planes on the corresponding sides; and the shaft oil groove is arranged on at least one first plane and extends along the axial direction of the shaft body, and the shaft oil groove is communicated with the shaft oil hole. Through set up at least one axial oil groove that extends along the axle body on at least one first plane, can make the oil in the axle hole flow to the axle oil groove through the axle oilhole to carry out better lubrication between pivot and the piston, reduced the wearing and tearing between pivot and the piston effectively, improved the pump body structure and the life of compressor of the cylinder that have this kind of structure, improved the reliability of pump body structure and compressor simultaneously.

2. According to the pump body structure of the rotary cylinder piston compressor, the shaft oil groove is in a straight line shape. Therefore, the oil in the oil groove of the shaft can be quickly diffused, and better lubrication between the rotating shaft and the piston is realized.

3. According to the pump body structure of the rotary cylinder piston compressor, at least one shaft oil groove is respectively arranged on each first plane. Thus, the planes on two sides of the rotating shaft and the hole wall of the corresponding rotating shaft mounting hole can be lubricated, and a better lubricating effect is obtained.

4. In the pump body structure of the rotary cylinder piston compressor provided by the invention, in the process that the rotary shaft drives the piston to rotate, the area moving towards the corresponding second plane on the first plane is a shaft matching bearing area, the area moving away from the corresponding second plane is a shaft matching non-bearing area, and the shaft oil groove is arranged on the shaft matching non-bearing area. Therefore, the oil can be fully supplied between the first plane and the second plane, and the area of the shaft matching bearing area can be prevented from being reduced, so that the stress increase of the shaft matching bearing area can be avoided, and the abrasion between the rotating shaft and the piston can be further reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a cross slide structure;

Fig. 2 is an exploded perspective view of the pump body structure of the rotary cylinder piston compressor provided in embodiment 1 of the present invention;

FIG. 3 is a perspective assembly schematic diagram of the pump body of the rotary cylinder piston compressor shown in FIG. 2 in a state in which a rotary shaft is engaged with a piston;

FIG. 4 is a perspective view of a rotary shaft of the pump body structure of the rotary cylinder piston compressor shown in FIG. 2;

FIG. 5 is a schematic cross-sectional view of the spindle shown in FIG. 3;

FIG. 6 is a schematic perspective view of a cylinder of the pump body structure of the rotary cylinder piston compressor shown in FIG. 2;

fig. 7 is a schematic cross-sectional view of the cylinder shown in fig. 6 in a fitted state with the cylinder liner;

FIG. 8 is a schematic perspective view of a piston of the pump body structure shown in FIG. 2;

FIG. 9 is a schematic perspective view of an upper limit plate of the pump body structure of the rotary cylinder piston compressor shown in FIG. 2;

FIG. 10 is a schematic cross-sectional view of the stop shown in FIG. 9;

FIG. 11 is a schematic perspective view of a lower limiting plate of the pump body structure of the rotary cylinder piston compressor shown in FIG. 2;

FIG. 12 is a schematic cross-sectional view of the stop shown in FIG. 11;

FIG. 13 is a perspective view of a lower flange of the pump body structure of the rotary cylinder piston compressor of FIG. 2;

FIG. 14 is a schematic cross-sectional view of the lower flange shown in FIG. 13;

FIG. 15 is a schematic cross-sectional view of the pump body structure of the rotary cylinder piston compressor of FIG. 2 in an assembled state;

FIG. 16 is an enlarged schematic view of area A of FIG. 15;

FIG. 17 is a perspective view of the upper limiting plate of the pump body structure of the rotary cylinder piston compressor of FIG. 2 with the clearance groove removed;

FIG. 18 is a schematic cross-sectional view of the upper stop plate shown in FIG. 17;

FIG. 19 is an enlarged schematic view of area B of FIG. 15;

fig. 20 is a schematic cross-sectional view of the pump body structure of the rotary cylinder piston compressor provided in embodiment 2 of the present invention;

FIG. 21 is a schematic bottom view of the upper flange of the pump body structure of FIG. 20;

FIG. 22 is a schematic cross-sectional view of the upper flange shown in FIG. 21;

FIG. 23 is a schematic top view of the lower stop plate of the pump body structure shown in FIG. 20;

FIG. 24 is a schematic cross-sectional view of the lower limiting plate shown in FIG. 23;

Reference numerals illustrate:

1-a rotating shaft, 11-a shaft body, 111-a first plane, 12-a shaft inner hole, 13-a shaft oil hole, 14-a shaft oil groove,

2-A piston, 21-a rotating shaft mounting hole, 22-a second plane, 23-an oil outlet hole,

3-Cylinder, 31-piston mounting hole, 32-cylinder body, 321-cylinder side wall, 33-cylinder oil guiding hole, 34-rotating shaft hole, 35-protruding shaft, 36-first matching part,

4-Cylinder sleeve, 41-cylinder mounting cavity,

51-Upper limit plate, 52-lower limit plate,

61-Oil drain grooves, 62-empty avoiding grooves,

71-Upper flange, 711-mating hole, 72-lower flange, 721-mating body, 722-boss,

81-Inner circular matching oil guiding groove, 82-inner circular matching oil storage groove, 83-inner circular matching chamfer, 84-inner circular matching oil discharging hole, 85-oil inlet hole,

91-An outer circle matched with an oil guiding groove, 92-an outer circle matched with an oil storage groove, 93-a groove,

10-Second mating part, 20-pressure groove.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

Example 1

As shown in fig. 2-5, the present embodiment provides a pump body structure of a rotary cylinder piston 2 compressor, which includes a rotary shaft 1, a piston 2, a shaft oil groove 14, a cylinder 3, and a cylinder liner 4.

The rotating shaft 1 is arranged in the piston 2 and comprises a shaft body 11 and a shaft inner hole 12 arranged in the shaft body 11, wherein the shaft inner hole 12 extends along the axial direction of the shaft body 11; the shaft body 11 is provided with a shaft matching part matched with the piston 2, the peripheral wall of the shaft matching part is provided with two oppositely arranged first planes 111, and the rotating shaft 1 reciprocates relative to the piston 2 along the direction parallel to the first planes 111; a plurality of shaft oil holes 13 are provided between the wall of the shaft inner hole 12 and the first plane 111. The rotating shaft 1 and the air cylinder 3 are eccentrically arranged. As an alternative embodiment, only one shaft oil bore 13 may be provided between the bore wall of the shaft bore 12 and the corresponding first plane 111.

The piston 2 is mounted in the cylinder 3 and is provided with a shaft mounting hole 21 adapted to pass the shaft 1, and the wall of the shaft mounting hole 21 has a second plane 22 disposed opposite to the second plane 22, and the second plane 22 is matched with the first plane 111 on the corresponding side.

The shaft oil grooves 14 are provided in two, respectively, on the two first planes 111, and extend in the axial direction of the shaft body 11, and the shaft oil grooves 14 communicate with the shaft oil holes 13. Thus, the planes on two sides of the rotating shaft 1 and the hole wall of the corresponding rotating shaft mounting hole 21 can be lubricated, and a better lubricating effect is obtained. As an alternative embodiment, the shaft oil groove 14 may have only one, and be provided on one of the first flat surfaces 111. As an alternative embodiment, there may be four shaft oil grooves 14, and two shaft oil grooves 14 may be provided on each first plane 111.

The cylinder liner 4 is provided outside the piston 2, and is provided with a piston mounting hole 31 adapted to mount the piston 2, and the piston 2 is adapted to reciprocate in the piston mounting hole 31 with respect to the cylinder 3.

The cylinder liner 4 is provided with a cylinder mounting chamber 41 adapted to mount the cylinder 3, and the cylinder 3 is adapted to rotate in the cylinder mounting chamber 41 with respect to the cylinder liner 4.

The rotation shaft 1 rotates, so that the piston 2 reciprocates relative to the cylinder 3 and drives the cylinder 3 to rotate relative to the cylinder liner 4.

By providing at least one shaft oil groove 14 extending along the axial direction of the shaft body 11 on at least one first plane 111, oil in the shaft inner hole 12 can flow into the shaft oil groove 14 through the shaft oil hole 13, so that better lubrication is performed between the rotating shaft 1 and the piston 2, abrasion between the rotating shaft 1 and the piston 2 is effectively reduced, the service lives of the pump body structure and the compressor of the cylinder 3 with the structure are prolonged, and meanwhile, the reliability of the pump body structure and the compressor is improved.

The specific length of the shaft oil groove 14 is not limited, and in the present embodiment, the shaft oil groove 14 extends from one end to the other end of the first plane 111.

The specific shape of the shaft oil groove 14 may be varied, and the shaft oil groove 14 in this embodiment is linear. This allows the oil in the shaft oil groove 14 to spread rapidly, thereby achieving better lubrication between the shaft 1 and the piston 2. As an alternative embodiment, the shaft oil groove 14 may have a curved shape such as an arc shape or a wave shape.

There may be various specific positions of the shaft oil groove 14 on the first plane 111, and in this embodiment, the shaft oil groove 14 is eccentrically disposed on the first plane 111. As an alternative embodiment, the shaft oil groove 14 may be provided in the center of the first plane 111.

Specifically, in the process of the rotation shaft 1 driving the piston 2 to rotate, a region on the first plane 111 moving towards the corresponding second plane 22 is a shaft-matching bearing region, a region on the second plane 22 moving away from the corresponding second plane is a shaft-matching non-bearing region, and the shaft oil groove 14 is disposed on the shaft-matching non-bearing region. This prevents the area of the shaft-fitting bearing area from being reduced while supplying oil sufficiently between the first plane 111 and the second plane 22, so that an increase in stress of the shaft-fitting bearing area can be avoided, and wear between the rotary shaft 1 and the piston 2 can be further reduced.

The shaft oil hole 13 may be arranged in various ways, and the shaft oil hole 13 in this embodiment extends along the radial direction of the shaft body 11.

As shown in fig. 2 and fig. 6 to fig. 8, in the pump body structure of the compressor of the rotary cylinder piston 2 provided in this embodiment, the cylinder 3 includes a cylinder body and at least one cylinder oil guide hole 33.

A piston mounting hole 31 is formed in the peripheral wall of the cylinder body so as to penetrate therethrough.

The cylinder oil guide hole 33 extends from the wall of the piston mounting hole 31 to the outer peripheral surface of the cylinder 3.

By arranging at least one cylinder oil guide hole 33 on the cylinder body, oil in the piston mounting hole 31 can flow to the outer peripheral surface of the cylinder 3 through the cylinder oil guide hole 33, so that lubrication is carried out between the cylinder 3 and the cylinder sleeve 4, abrasion generated between the cylinder 3 and the cylinder sleeve 4 is effectively reduced, the service life of the pump body structure of the cylinder 3 with the structure and the service life of the compressor are prolonged, and meanwhile, the reliability of the pump body structure and the compressor are improved.

The specific extension of the cylinder oil guide hole 33 may be varied, and in this embodiment, the cylinder oil guide hole 33 extends in the radial direction of the cylinder body.

The specific shape of the cylinder oil guide hole 33 is not limited, and the cylinder oil guide hole 33 in the present embodiment is linear. As an alternative embodiment, the cylinder oil guide hole 33 may have a curved shape such as an arc shape or a wave shape.

In the present embodiment, the piston mounting hole 31 divides the peripheral wall of the cylinder body into two opposite cylinder side walls, each of which is provided with at least one cylinder oil guide hole 33 in order to make it possible to make lubrication between the cylinder 3 and the cylinder liner 4 more uniform in the circumferential direction. As an alternative embodiment, the cylinder oil guide hole 33 may be provided in only one cylinder side wall.

The number of the cylinder oil guide holes 33 provided on each cylinder side wall is not limited, and in the present embodiment, two cylinder oil guide holes 33 are provided on each cylinder side wall. As an alternative embodiment, one or three cylinder oil guide holes 33 may be provided in each cylinder side wall.

The specific positions of the cylinder oil guide holes 33 on the cylinder side wall may be varied, and in order to make lubrication between the cylinder 3 and the cylinder liner 4 more uniform in the axial direction, in this embodiment, two cylinder oil guide holes 33 on each cylinder side wall are provided at both ends of the cylinder side wall, respectively.

In the present embodiment, the cylinder liner 4 is provided with an intake port communicating with the cylinder mounting chamber 41, and the cylinder oil guide hole 33 is offset from the intake port. Since the cylinder oil guide hole 33 is normally at a high pressure and the suction port is normally at a low pressure, the cylinder oil guide hole 33 and the suction port are arranged in a staggered manner, so that oil in the cylinder oil guide hole 33 can be effectively prevented from leaking into the suction port, and further, the lubrication effect and the performance of the compressor can be ensured.

In order to reduce wear generated between the piston 2 and the cylinder 3, in this embodiment, as shown in fig. 8, a shaft mounting hole 21 adapted to pass through the shaft 1 is provided on the piston 2, at least one oil outlet hole 23 is provided on a sidewall of the piston 2 corresponding to the cylinder oil guide hole 33, and the oil outlet hole 23 extends from a wall of the shaft mounting hole 21 to an outer circumferential surface of the piston 2. The oil outlet hole 23 is arranged on the piston 2, so that oil in the rotating shaft mounting hole 21 can flow to the outer peripheral surface of the piston 2 through the oil outlet hole 23, thereby lubricating between the piston 2 and the cylinder 3, effectively reducing abrasion between the piston 2 and the cylinder 3, and improving the service life and reliability of the pump body structure and the compressor.

In order to effectively prevent the oil flowing out from the oil outlet hole 23 from directly flowing out from the cylinder oil guide hole 33 and further ensure sufficient lubrication between the piston 2 and the cylinder 3, the oil outlet hole 23 and the cylinder oil guide hole 33 are provided in a staggered manner in this embodiment.

In the present embodiment, at least one oil outlet hole 23 is provided on each of the opposite side walls of the piston 2 corresponding to the cylinder oil guide hole 33. This makes it possible to make lubrication between the piston 2 and the cylinder 3 more uniform in the circumferential direction.

The specific number of the oil outlet holes 23 is not limited, and in this embodiment, one oil outlet hole 23 is provided on each of two opposite side walls of the piston 2 corresponding to the cylinder oil guide hole 33. As an alternative embodiment, two or three oil outlet holes 23 may be provided on two opposite side walls of the piston 2 corresponding to the cylinder oil guide holes 33, respectively.

The specific positions of the oil outlet holes 23 on the side wall of the piston 2 may be various, and the oil outlet holes 23 in this embodiment are located in the middle of the side wall of the piston 2. As an alternative embodiment, the oil outlet hole 23 may be located at a position offset upward or downward from the middle of the side wall of the piston 2.

As shown in fig. 2 and fig. 9-12, the pump body structure of the rotary cylinder piston 2 compressor provided in this embodiment further includes two end face matching structures and at least one clearance structure.

The two end face matching structures are respectively arranged at two ends of the cylinder 3 and are connected to the cylinder sleeve 4.

The clearance structure is provided on one end of the at least one end face fitting structure facing the end face of the cylinder 3, and includes at least one oil drain groove 61, the oil drain groove 61 extending from the inner peripheral face of the end face fitting structure to the outer peripheral face of the end face fitting structure.

Through setting up at least one oil drain groove 61 on at least one terminal surface cooperation structure, and oil drain groove 61 extends to the outer peripheral face of terminal surface cooperation structure from the inner peripheral face of terminal surface cooperation structure, can make the oil in the cylinder installation cavity 41 enter into oil drain groove 61, cylinder 3 in the rotation in-process, oil flows under centrifugal force effect in oil drain groove 61 by the inner peripheral face of terminal surface cooperation structure extremely the outer peripheral face of terminal surface cooperation structure, simultaneously, the terminal surface of cylinder 3 sweeps oil drain groove 61 constantly, and oil supplies each position between cylinder 3 and the terminal surface cooperation structure, carries out abundant lubrication between cylinder 3 and the terminal surface cooperation structure, has effectively reduced wearing and tearing between cylinder 3 and the terminal surface cooperation structure, has improved pump body structure and compressor's life and reliability.

As an alternative embodiment, a clearance structure may be provided on at least one end surface of the cylinder 3 assembly, and the oil drain groove 61 may extend from the inner circumferential surface of the corresponding end surface engagement structure of the cylinder 3 to the outer circumferential surface of the cylinder liner 4.

In this embodiment, one end of each end face fitting structure facing the end face of the cylinder 3 is provided with at least one clearance structure. Therefore, the cylinder 3 and the end face matching structures at the two ends can be fully lubricated, abrasion between the cylinder 3 and the end face matching structures is reduced more effectively, and the service life and reliability of the pump body structure and the compressor are further improved. As an alternative embodiment, the clearance structure may be provided on only one end face mating structure.

The number of the clearance structures provided on each end face fitting structure is not limited, and in this embodiment, one end of each end face fitting structure facing the end face of the cylinder 3 is provided with one clearance structure. As an alternative embodiment, the end of each end face engaging structure facing the end face of the cylinder 3 may also be provided with two or three clearance structures.

The specific shape of the oil drain groove 61 may be varied, and the oil drain groove 61 in this embodiment is linear. As an alternative embodiment, the oil drain groove 61 may have a curved shape such as an arc shape or a wave shape.

The specific way of extending the oil drain grooves 61 on the end face fitting structure is not limited, and in the present embodiment, the oil drain grooves 61 extend in the radial direction of the end face fitting structure.

The specific number of the oil drain grooves 61 in the evacuation structure is not limited, and the evacuation structure in the present embodiment includes one oil drain groove 61. As an alternative embodiment, the clearance structure may also comprise two or three oil drains 61.

In the present embodiment, the clearance structure further includes at least one clearance groove 62, and the clearance groove 62 extends in the circumferential direction of the end face fitting structure and communicates with the oil drain groove 61. The arrangement of the clearance groove 62 can lubricate the cylinder 3 and the end face matching structure more fully, and can reduce the contact area between the cylinder 3 and the end face matching structure, thereby reducing friction loss and abrasion, and simultaneously, the friction heat between the cylinder 3 and the end face matching structure can be discharged through the clearance groove 62 and the oil discharge groove 61. As an alternative embodiment, the clearance groove 62 may be provided on the end surface of the cylinder 3 and extend in the circumferential direction of the cylinder 3.

The shape of the clearance groove 62 may be varied, and the clearance groove 62 in this embodiment is annular. This allows for more adequate lubrication between the cylinder 3 and the end face mating structure. As an alternative embodiment, the clearance groove 62 may be semi-annular, or may be formed in a major arc shape.

The specific number of the empty-avoiding grooves 62 in the empty-avoiding structure can be various, and the number can be flexibly selected according to requirements. In this embodiment, the void-avoiding structure includes a plurality of void-avoiding grooves 62, and the plurality of void-avoiding grooves 62 are distributed at intervals along the radial direction of the end-face mating structure. As an alternative embodiment, the clearance structure may also comprise only one clearance groove 62.

The specific position of the void-avoiding groove 62 on the end-face fitting structure is not limited, and in the present embodiment, the void-avoiding groove 62 is provided near the inner peripheral surface of the end-face fitting structure.

The specific forms of the two end face fitting structures may be various, and in this embodiment, the two end face fitting structures may be both limiting plates, and are respectively an upper limiting plate 51 and a lower limiting plate 52. As an alternative embodiment, both end-face mating structures may be flanges. As an alternative embodiment, one of the end-face engaging structures may be a limiting plate, and the other end-face engaging structure may be a flange.

The specific mode for realizing the matching of the air cylinders 3 can be various, and the air cylinders can be flexibly arranged according to the specific different structural modes of the air cylinders 3. For example, when the cylinder 3 includes a cylinder body and two protruding shafts (so-called stub shafts), both ends of the cylinder 3 may be internally fitted by the upper and lower flanges 72, respectively, or may be externally fitted by the upper and lower limiting plates 52, respectively, or may be internally and externally fitted at each end, or may be internally and externally fitted at one end, and the other end may be internally or externally fitted at the other end; when the cylinder 3 comprises a cylinder body and a protruding shaft, the end of the cylinder 3 without the protruding shaft can realize inner circular fit through a flange, and the end with the protruding shaft can realize inner circular fit through a flange or realize outer circular fit through a limiting plate; when the cylinder 3 only includes a cylinder body and no protruding shaft is provided at both ends, the two ends of the cylinder 3 are generally internally fitted through flanges.

In this embodiment, the cylinder 3 includes a cylinder body, and protruding shafts extending outward from both ends of the cylinder body, wherein the lower ends are internally fitted at the protruding shafts by the lower flange 72, and the upper ends are externally fitted at the protruding shafts by the upper limiting plate 51.

In the pump body structure of the rotary cylinder piston 2 compressor provided in this embodiment, the pump body structure includes two limiting plates and two flanges, the two limiting plates are respectively an upper limiting plate 51 and a lower limiting plate 52, and the two flanges are respectively an upper flange 71 and a lower flange 72. Wherein, the upper limiting plate 51 is arranged between the upper flange 71 and the upper end of the cylinder 3, and the lower limiting plate 52 is arranged between the lower flange 72 and the lower end of the cylinder 3. The upper limiting plate 51 is used for carrying out outer circle matching with the upper end of the air cylinder 3 and carrying out outer circle supporting on the air cylinder 3; the lower flange 72 is used for internally fitting with the lower end of the cylinder 3 and internally supporting the cylinder 3. The upper flange 71 and the lower limiting plate 52 are used for realizing the normal assembly limit with the cylinder 3.

As shown in fig. 2 and fig. 13-16, the pump body structure of the rotary cylinder piston 2 compressor provided in this embodiment further includes an inner circular matching structure and an inner circular matching oil guiding groove 81.

The cylinder 3 is provided with a rotation shaft hole 34, the rotation shaft hole 34 penetrating the cylinder 3 in the axial direction and adapted to mount the rotation shaft 1, and a piston mounting hole 31 penetrating the side wall of the cylinder 3 and adapted to mount the piston 2.

The inner circular matching structure is provided with one and is arranged at the lower end of the air cylinder 3, and comprises a matching body 721 and a boss 722 extending from the matching body 721; the boss 722 is adapted to extend into the spindle bore 34 and cooperate with the bore wall of the spindle bore 34; the maximum length of the fitting body 721 in the radial direction of the cylinder 3 is larger than the aperture of the rotation shaft hole 34; the cylinder 3 rotates relative to the inner circular mating structure. As an alternative embodiment, the inner circular fitting structure may have two parts, which are respectively provided at both ends of the cylinder 3.

The inner circular fitting oil guiding groove 81 is provided on the outer peripheral surface of the boss 722, and extends from one end of the boss 722 away from the fitting body 721 to the fitting body 721. As an alternative embodiment, the inner circumferential oil guide groove 81 may be provided in the wall of the rotation shaft hole 34 and extend from the wall of the piston mounting hole 31 to the outer end surface of the cylinder 3.

Through setting up interior circular fit oil guide groove 81 on the outer peripheral face of boss 722 or the pore wall of pivot hole 34, and interior circular fit oil guide groove 81 extends to the cooperation body 721 by the one end that boss 722 kept away from cooperation body 721, or extends to the outer terminal surface of cylinder 3 by the pore wall of piston mounting hole 31, can make in the pivot 1 rotation in-process spun oil enter into interior circular fit oil guide groove 81 to lubricate between the outer peripheral face of boss 722 and the pore wall of pivot hole 34, effectively reduced the wearing and tearing between cylinder 3 and the interior circular fit structure, improved pump body structure and compressor's life and reliability.

The specific shape of the engaging body 721 may be varied, and in this embodiment, the engaging body 721 has a cylindrical shape with an outer diameter larger than the diameter of the spindle hole 34. As an alternative embodiment, the fitting body 721 may be a cylinder having a rectangular cross section.

The specific shape of the inner circular fitting oil guiding groove 81 may be various, and the inner circular fitting oil guiding groove 81 in this embodiment is spiral. The inner circle matching oil guiding groove 81 with the structural form can enable the oil in the inner circle matching oil guiding groove 81 to lubricate the outer peripheral surface of the boss 722 and the hole wall of the rotating shaft hole 34 more fully. As an alternative embodiment, the inner circumferential oil guiding groove 81 may be linear and extend in the axial direction of the boss 722.

In order to be able to power the flow of oil in the inner circular fitting oil guiding groove 81, the mobility of oil in the inner circular fitting oil guiding groove 81 is enhanced, and further the lubrication effect is enhanced, in this embodiment, the relation between the rotation direction of the inner circular fitting oil guiding groove 81 and the rotation direction of the cylinder 3 is satisfied, and when the cylinder 3 rotates relative to the inner circular fitting structure, a component force is applied to the oil in the inner circular fitting oil guiding groove 81 toward the fitting body 721. Specifically, the direction of rotation of the inner circular fitting oil guide groove 81 is opposite to the direction in which the cylinder 3 rotates with respect to the inner circular fitting structure. As an alternative embodiment, when the inner circumferential oil guiding groove 81 is provided on the wall of the rotation shaft hole 34, it is preferable that the rotation direction of the inner circumferential oil guiding groove 81 is the same as the rotation direction of the cylinder with respect to the inner circumferential structure.

The pump body structure of the rotary cylinder piston 2 compressor provided in this embodiment further includes an annular inner circular matching oil storage tank 82, where the inner circular matching oil storage tank 82 is disposed on the outer circumferential surface of the boss 722 and is communicated with one end of the inner circular matching oil guide tank 81 far away from the matching body 721. This ensures the supply of oil at the end of the inner circular fitting oil guide groove 81 remote from the fitting body 721, thereby ensuring effective lubrication between the outer peripheral surface of the boss 722 and the wall of the rotary shaft hole 34. As an alternative embodiment, the inner matching reservoir 82 may also be provided on the bore wall of the spindle bore 34. As an alternative embodiment, the inner matching oil reservoir 82 may be provided on the outer peripheral surface of the boss 722 and the wall of the rotation shaft hole 34 at the same time.

The specific forming manner of the inner circular matching oil storage groove 82 can be various, in this embodiment, an inner circular matching chamfer 83 is disposed at one end of the boss 722 far away from the matching body 721, and the inner circular matching oil storage groove 82 is formed between the inner circular matching chamfer 83 and the wall of the rotating shaft hole 34. As an alternative embodiment, an inner circular mating chamfer 83 may be provided at an end of the shaft hole 34 facing the piston mounting hole 31, and an inner circular mating oil reservoir 82 may be formed between the inner circular mating chamfer 83 and the outer circumferential surface of the boss 722. As an alternative embodiment, the boss 722 may be provided with an internal circular mating chamfer 83 at an end remote from the mating body 721, while the rotating shaft hole 34 is also provided with an internal circular mating chamfer 83 at an end facing the piston mounting hole 31; the inner circular fit oil storage groove 82 is formed between the inner circular fit chamfer 83 on the boss 722 and the wall of the rotation shaft hole 34, and between the inner circular fit chamfer 83 on the rotation shaft hole 34 and the outer circumferential surface of the boss 722, that is, the inner circular fit oil storage groove 82 is formed between the two inner circular fit chamfers 83.

In this embodiment, the fitting body 721 is provided with an inner circular fitting oil drain hole 84, and the inner circular fitting oil drain hole 84 is a through hole penetrating the fitting body 721 in the axial direction and communicates with one end of the inner circular fitting oil guide groove 81 away from the piston mounting hole 31. The arrangement of the inner circular matching oil drain hole 84 can immediately drain the oil in the inner circular matching oil guide groove 81 into an oil pool of the compressor, so that oil circuit circulation is formed, the oil in the inner circular matching oil guide groove 81 can take away the friction heat between the outer peripheral surface of the absorbed boss 722 and the wall of the rotating shaft hole 34 in real time, the temperature of a friction pair formed between the outer peripheral surface of the boss 722 and the wall of the rotating shaft hole 34 of the cylinder 3 is reduced, and the reliability of the compressor is improved.

In the process that the rotating shaft 1 drives the air cylinder 3 to rotate, the area where the air cylinder 3 moves towards the outer peripheral surface of the corresponding boss 722 and the area where the outer peripheral surface of the boss 722 corresponds to the area are the matching bearing areas of the air cylinder 3; the area where the cylinder 3 moves away from the outer peripheral surface of the corresponding boss 722 and the area where the outer peripheral surface of the boss 722 corresponds to the area are non-bearing areas where the cylinder 3 is matched.

The specific position of the inner circular matching oil guiding groove 81 on the boss 722 can be various, and in this embodiment, the inner circular matching oil guiding groove 81 is arranged on the matching non-bearing area of the cylinder 3. Because the friction between the outer peripheral surface of the boss 722 at the matched bearing area of the air cylinder 3 and the hole wall of the rotating shaft hole 34 is larger, the inner circular matched oil guide groove 81 is arranged on the matched non-bearing area of the air cylinder 3, so that the continuity of a lubricating oil film at the matched bearing area of the air cylinder 3 can be ensured, the lubricating area is ensured to have a good lubricating effect, the abrasion of the matched bearing area of the air cylinder 3 is reduced, the abrasion between the outer peripheral surface of the boss 722 and the hole wall of the rotating shaft hole 34 of the air cylinder 3 is further reduced, and meanwhile, the effect of preventing stress concentration at the matched bearing area of the air cylinder 3 is also realized.

In this embodiment, the cylinder 3 includes a cylinder body and protruding shafts extending outward from both ends of the cylinder body, and the hole wall of the rotating shaft hole 34 at the protruding shaft is matched with the outer peripheral surface of the inner circular matching structure. As an alternative embodiment, a protruding shaft may extend only at one end of the cylinder body. As an alternative embodiment, no protruding shaft may be provided at both ends of the cylinder body.

The pump body structure of the rotary cylinder piston 2 compressor provided in this embodiment further includes an oil inlet hole 85 disposed on the mating body 721, where the oil inlet hole 85 penetrates the mating body 721 along the axial direction and is disposed near the boss 722.

The specific structure of the inner circular fitting structure may be various, and the inner circular fitting structure in this embodiment is the lower flange 72.

As shown in fig. 2, 15 and 17-19, the pump body structure of the rotary cylinder piston 2 compressor provided in this embodiment further includes an outer circle matching structure and an outer circle matching oil guiding groove 91.

The cylinder body is provided with a piston mounting hole 31. The protruding shaft is provided with a rotating shaft hole 34 and at least one protruding shaft oil guide hole; the shaft hole 34 is adapted to mount the shaft 1; the boss oil guide hole penetrates through a sidewall of the boss and communicates with the rotation shaft hole 34.

The outer circle matching structure is provided with one, is arranged at the upper end of the air cylinder 3, and is provided with a matching hole 711 suitable for being filled with a convex shaft; the diameter of the fitting hole 711 is smaller than the outer diameter of the cylinder 3; the cylinder 3 rotates relative to the outer circular mating structure. As an alternative embodiment, the outer circular matching structure may have two parts, which are respectively provided at both ends of the cylinder 3.

The outer circle matching oil guide groove 91 is arranged on the hole wall of the matching hole 711, and extends from the hole wall of the matching hole 711 to the end far away from the cylinder body towards one end of the cylinder body; or the outer circle matching oil guide groove 91 is arranged on the outer circumferential surface of the protruding shaft, and one end connected with the cylinder body by the protruding shaft extends to one end far away from the cylinder body.

By arranging at least one convex shaft oil guide hole on the convex shaft, the oil distributed in the rotation process of the rotating shaft 1 can be guided out to the position between the outer peripheral surface of the convex shaft and the hole wall of the matching hole 711; meanwhile, through setting up the excircle cooperation and lead the oil groove 91 on the pore wall of mating hole 711 or on the outer peripheral face of protruding axle, and excircle cooperation lead the oil groove 91 by the pore wall of mating hole 711 orientation the one end of jar body extends to keeping away from the one end of jar body, perhaps by protruding axle with the one end that the jar body is connected extends to keeping away from the one end of jar body, can make in the pivot 1 rotation in-process by protruding axle lead oil hole department spun oil enter into excircle cooperation and lead the oil groove 91 to lubricate between the outer peripheral face of protruding axle and the pore wall of mating hole 711, effectively reduced the wearing and tearing between cylinder 3 and the excircle cooperation structure, improved pump body structure and compressor's life and reliability.

The specific shape of the outer circumferential engagement oil guide groove 91 may be various, and in this embodiment, the outer circumferential engagement oil guide groove 91 is linear and extends in the axial direction of the engagement hole 711 or the axial direction of the male shaft. As an alternative embodiment, the outer circumferential engagement oil guiding groove 91 may be spiral, and the relationship between the rotation direction of the outer circumferential engagement oil guiding groove 91 and the rotation direction of the cylinder 3 is satisfied, and when the cylinder 3 rotates relative to the outer circumferential engagement structure, a component force is applied to the oil in the outer circumferential engagement oil guiding groove 91 away from the cylinder body.

The specific position of the camshaft oil guiding hole is not limited, and the camshaft oil guiding hole in this embodiment is disposed close to the cylinder body.

The number of the protruding shaft oil guide holes may be varied, and in this embodiment, two protruding shaft oil guide holes are provided and are disposed opposite to each other on the protruding shaft. As an alternative embodiment, the camshaft oil guide hole may have only one. As an alternative embodiment, the protruding shaft oil guide holes may have three or four or the like, and may be uniformly distributed in the circumferential direction of the protruding shaft.

The pump body structure of the rotary cylinder piston 2 compressor provided in this embodiment further includes an annular outer circle matching oil storage tank 92, and the outer circle matching oil storage tank 92 is disposed on the wall of the matching hole 711 and is communicated with the outer circle matching oil guiding groove 91 toward one end of the cylinder body. This ensures the supply of oil from the outer circumferential mating oil guide groove 91 toward one end of the cylinder body, thereby ensuring effective lubrication between the outer circumferential surface of the male shaft and the wall of the mating hole 711. As an alternative embodiment, the outer circumferential mating oil reservoir 92 may be provided on the outer circumferential surface of the male shaft. As an alternative embodiment, the outer circumferential mating oil reservoir 92 may be provided on the wall of the mating hole 711 and on the outer circumferential surface of the male shaft.

The specific forming manner of the outer circle matching oil storage tank 92 may be various, in this embodiment, an annular groove 93 is formed at the matching hole 711 towards one end of the cylinder 3 by the outer circle matching structure, and the outer circle matching oil storage tank 92 is formed between the groove 93 and the outer circumferential surface of the protruding shaft. As an alternative embodiment, the engagement hole 711 may have a chamfer at one end facing the cylinder body, and an outer circumferential engagement oil reservoir 92 may be formed between the chamfer and the outer circumferential surface of the male shaft.

The specific position of the outer circle matching oil guiding groove 91 on the hole wall of the matching hole 711 may be various, and in this embodiment, the outer circle matching oil guiding groove 91 is disposed on the matching non-bearing area of the cylinder 3. Because the friction between the outer peripheral surface of the convex shaft at the matched bearing area of the air cylinder 3 and the hole wall of the matched hole 711 is larger, the excircle matched oil guide groove 91 is arranged on the matched non-bearing area of the air cylinder 3, so that the continuity of a lubricating oil film at the matched bearing area of the air cylinder 3 can be ensured, the lubricating area is ensured to have better lubricating effect, the abrasion of the matched bearing area of the air cylinder 3 is reduced, the abrasion between the outer peripheral surface of the convex shaft and the hole wall of the matched hole 711 is further reduced, and meanwhile, the effect of preventing stress concentration at the matched bearing area of the air cylinder 3 is also realized.

The inner circular matching structure is provided with an outer circular matching oil drain hole which is a through hole penetrating through the inner circular matching structure along the axial direction and is communicated with one end of the outer circular matching oil guide groove 91, which is far away from the cylinder body. The setting of excircle cooperation oil drain hole can be with the excircle cooperation lead in the oil tank 91 in the oil pool of compressor of discharging immediately to form the oil circuit circulation, the oil in the excircle cooperation oil tank 91 can take away the frictional heat between the outer peripheral face of absorptive protruding axle and the pore wall of mating hole 711 in real time, has reduced the temperature of the friction pair that constitutes between the outer peripheral face of protruding axle and the pore wall of mating hole 711, has improved the reliability of compressor.

The specific structural form of the outer circle matching structure can be various, and the outer circle matching structure in this embodiment is the upper limiting plate 51.

The embodiment also provides a rotary cylinder piston 2 compressor, which comprises the pump body structure of the rotary cylinder piston 2 compressor.

Example 2

As shown in fig. 20 to 24, the pump body structure of the rotary cylinder piston 2 compressor provided in this embodiment is different from that of embodiment 1 in that the cylinder 3 is provided with a male shaft only at one end of the cylinder body, and the upper limit plate 51 and the lower flange 72 are removed.

The cylinder liner 4 is provided with an exhaust port and an intake port which are respectively communicated with the cylinder mount chamber 41. The end face of the cylinder 3 is provided with a first matching part; the first matching part has a tendency to move towards the corresponding end face matching structure under the pressure action of the exhaust port;

The position of the end surface matching structure, which faces the first matching part, on one side surface of the air cylinder 3 is provided with a second matching part 10, the second matching part 10 of at least one end surface matching structure is provided with at least one pressure groove 20, and the pressure groove 20 is suitable for introducing pressure oil and/or pressure gas so as to reduce or eliminate the movement trend of the first matching part towards the corresponding end surface matching structure.

When a high pressure at the exhaust port is applied to the cylinder 3 at a horizontal pressure, a moment is applied to the cylinder 3 which tends to tilt the cylinder 3 (particularly, when the cylinder 3 is provided with a short shaft at only one end, the cylinder 3 is more easily tilted), the first engaging portion tends to move toward the corresponding end face engaging structure, and at this time, the pressure oil and/or the pressure gas introduced into the pressure groove 20 tends to subject the cylinder 3 to a moment opposite to the moment, so that the tendency of the first engaging portion to move toward the corresponding end face engaging structure is reduced or eliminated, thereby reducing the degree of tilt of the cylinder 3 or avoiding tilting of the cylinder 3.

In the present embodiment, at least one pressure groove 20 is provided on the second fitting portion 10 of each end face fitting structure. In this way, a moment opposite to the moment that tends to tilt the cylinder 3 can be applied from both ends of the cylinder 3, respectively, thereby more effectively reducing the degree of tilt of the cylinder 3 or avoiding the occurrence of tilt of the cylinder 3. As an alternative embodiment, the second engaging portion 10 having only one end surface engaging structure may be provided with the pressure groove 20.

The specific number of the pressure grooves 20 on each end face fitting structure may be varied, and in this embodiment, one pressure groove 20 is provided on each end face fitting structure's second fitting part 10. As an alternative embodiment, two or three pressure grooves 20 may also be provided on the second mating portion 10 of each end face mating structure.

There are various specific ways of introducing the pressure oil and/or the pressure gas into the pressure tank 20, and in this embodiment, the pressure tank 20 is in communication with an oil path on the end-face fitting structure. The oil path of the end face matching structure is provided with high-pressure oil and high-pressure air flowing in from the rotating shaft 1. The high-pressure oil and the high-pressure air can be supplied to the pressure tank 20 only through the oil path, and the device has the advantages of being simple in structure and convenient to realize.

The specific shape of the pressure groove 20 may be varied, and in this embodiment, the pressure groove 20 is arc-shaped and extends along the circumferential direction of the end surface mating structure. As an alternative embodiment, the pressure tank 20 may be linear, wavy, or the like.

The cylinder body and the protruding shaft together form a shaft hole 34 adapted to be penetrated by the shaft 1 of the pump body structure.

The specific forms of the two end face matching structures may be various, in this embodiment, the end face matching structure that matches the upper end face of the cylinder 3 is an upper flange 71, and the end face matching structure that matches the lower end face of the cylinder 3 is a lower limiting plate 52. As an alternative embodiment, both end-face mating structures may be flanges. As an alternative embodiment, both end-face mating structures may be limiting plates.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.

Claims

1. A pump body structure of a rotary cylinder piston compressor, comprising:

the rotating shaft (1) comprises a shaft body (11) and a shaft inner hole (12) arranged in the shaft body (11), wherein the shaft inner hole (12) extends along the axial direction of the shaft body (11); the shaft body (11) is provided with a shaft matching part matched with the piston (2), the peripheral wall of the shaft matching part is provided with two oppositely arranged first planes (111), and the rotating shaft (1) reciprocates relative to the piston (2) along the direction parallel to the first planes (111); at least one shaft oil hole (13) is arranged between the hole wall of the shaft inner hole (12) and the first plane (111) in a penetrating way;

The piston (2) is provided with a rotating shaft mounting hole (21) which is suitable for the rotating shaft (1) to pass through, the hole wall of the rotating shaft mounting hole (21) is provided with two second planes (22) which are oppositely arranged, and the second planes (22) are matched with the first planes (111) on the corresponding sides;

At least one shaft oil groove (14) arranged on at least one first plane (111) and extending along the axial direction of the shaft body (11), wherein the shaft oil groove (14) is communicated with the shaft oil hole (13); the shaft oil groove (14) is eccentrically arranged on the first plane (111), the rotating shaft (1) drives the piston (2) to rotate, a moving area of the first plane (111) towards the corresponding second plane (22) is a shaft matching bearing area, a moving area of the second plane (22) opposite to the first plane is a shaft matching non-bearing area, and the shaft oil groove (14) is arranged on the shaft matching non-bearing area.

2. Pump body structure of a rotary cylinder piston compressor according to claim 1, characterized in that the shaft oil groove (14) extends from one end to the other end of the first plane (111).

3. Pump body structure of a rotary cylinder piston compressor according to claim 1, characterized in that the shaft oil groove (14) is rectilinear.

4. Pump body structure of a rotary cylinder piston compressor according to claim 1, characterized in that a plurality of shaft oil holes (13) are provided between the wall of the shaft inner hole (12) and the corresponding first plane (111).

5. Pump body structure of a rotary cylinder piston compressor according to any one of claims 1-4, characterized in that at least one shaft oil groove (14) is provided on each of the first planes (111).

6. Pump body structure of a rotary cylinder piston compressor according to claim 5, characterized in that one of said shaft oil grooves (14) is provided on each of said first planes (111).

7. Pump body structure of a rotary cylinder piston compressor according to claim 1, characterized in that the shaft oil hole (13) extends in the radial direction of the shaft body (11).

8. The pump body structure of a rotary cylinder piston compressor according to any one of claims 1 to 4, further comprising:

The cylinder (3) is sleeved outside the piston (2) and is provided with a piston mounting hole (31) suitable for mounting the piston (2), and the piston (2) is suitable for reciprocating in the piston mounting hole (31) relative to the cylinder (3);

A cylinder liner (4) provided with a cylinder mounting cavity (41) adapted to mount the cylinder (3), the cylinder (3) being adapted to rotate in the cylinder mounting cavity (41) with respect to the cylinder liner (4).

9. Pump body structure of a rotary cylinder piston compressor according to claim 8, characterized in that the cylinder (3) comprises:

A cylinder body (32), wherein the piston mounting hole (31) is penetratingly formed in the peripheral wall of the cylinder body (32);

at least one cylinder oil guide hole (33) extending from the wall of the piston mounting hole (31) to the outer peripheral surface of the cylinder (3).

10. The pump body structure of the rotary cylinder piston compressor according to claim 9, wherein the cylinder liner (4) is provided with an air suction port communicated with the cylinder installation cavity (41), and the cylinder oil guide hole (33) is arranged in a staggered manner with the air suction port.

11. Pump body structure of a rotary cylinder piston compressor according to claim 9, characterized in that the piston (2) is provided with a rotary shaft mounting hole (21) adapted to allow the rotary shaft (1) to pass through, the side wall of the piston (2) corresponding to the cylinder oil guiding hole (33) is provided with at least one oil outlet hole (23), and the oil outlet hole (23) extends from the hole wall of the rotary shaft mounting hole (21) to the outer peripheral surface of the piston (2).

12. The pump body structure of a rotary cylinder piston compressor according to claim 8, further comprising two end-face fitting structures provided at both ends of the cylinder (3) respectively and connected to the cylinder liner (4).

13. Pump body structure of a rotary cylinder piston compressor according to claim 12, characterized in that it further comprises at least one clearance structure provided on at least one of the end faces of the end face fitting structure facing the cylinder (3) or on at least one of the end faces of the cylinder (3) and the cylinder liner (4); the clearance structure comprises at least one oil drain groove (61), wherein the oil drain groove (61) extends from the inner peripheral surface of the end surface matching structure to the outer peripheral surface of the end surface matching structure, or extends from the inner peripheral surface of the cylinder (3) corresponding to the end surface matching structure to the outer peripheral surface of the cylinder sleeve (4).

14. Pump body structure of a rotary cylinder piston compressor according to claim 13, characterized in that the clearance structure is provided on at least one end face of the end face fitting structure facing the cylinder (3), and the oil drain groove (61) extends from an inner peripheral face of the end face fitting structure to an outer peripheral face of the end face fitting structure.

15. Pump body structure of a rotary cylinder piston compressor according to claim 14, characterized in that the relief structure further comprises at least one relief groove (62), which relief groove (62) extends in the circumferential direction of the end face mating structure and communicates with the oil drain groove (61).

16. The pump body structure of a rotary cylinder piston compressor according to claim 12, wherein,

The cylinder sleeve (4) is provided with an exhaust port communicated with the cylinder mounting cavity (41); the end face of the cylinder (3) is provided with a first matching part (36), and the first matching part (36) has a trend of moving towards the corresponding end face matching structure under the action of pressure at the exhaust port;

the position of the end surface matching structure, which faces to the first matching part (36) on one side surface of the air cylinder (3), is provided with a second matching part (10), at least one pressure groove (20) is arranged on the second matching part (10) of the end surface matching structure, and the pressure groove (20) is suitable for introducing pressure oil and/or pressure gas so that the movement trend of the first matching part (36) towards the corresponding end surface matching structure is reduced or eliminated.

17. Pump body structure of a rotary cylinder piston compressor according to claim 8, characterized in that the cylinder (3) is provided with a rotary shaft hole (34), the pump body structure further comprising:

at least one inner circular mating structure comprising a mating body (721), and a boss (722) extending from the mating body (721); the boss (722) is suitable for extending into the rotating shaft hole (34) and is matched with the hole wall of the rotating shaft hole (34); the maximum length of the matching body (721) in the radial direction of the cylinder (3) is larger than the aperture of the rotating shaft hole (34); the cylinder (3) rotates relative to the inner circular matching structure;

An inner circular matching oil guide groove (81), wherein the inner circular matching oil guide groove (81) is arranged on the outer circumferential surface of the boss (722), and extends from one end of the boss (722) far away from the matching body (721) to the matching body (721); or the inner circular matching oil guide groove (81) is arranged on the hole wall of the rotating shaft hole (34), and extends from the hole wall of the piston mounting hole (31) to the outer end surface of the cylinder (3).

18. Pump body structure of a rotary cylinder piston compressor according to claim 17, characterized by further comprising an annular inner circular mating oil reservoir (82), said inner circular mating oil reservoir (82) being provided on the outer circumferential surface of said boss (722) and/or on the bore wall of said rotary shaft bore (34); the inner circular matching oil storage groove (82) is communicated with one end, far away from the matching body (721), of the inner circular matching oil guide groove (81).

19. The pump body structure of a rotary cylinder piston compressor according to claim 18, wherein the fitting body (721) is provided with an inner circular fitting oil drain hole (84), and the inner circular fitting oil drain hole (84) is a through hole penetrating the fitting body (721) in the axial direction and is communicated with one end of the inner circular fitting oil guide groove (81) away from the piston mounting hole (31).

20. Pump body structure of a rotary cylinder piston compressor according to claim 12, characterized in that the cylinder (3) comprises a cylinder body (32), and a protruding shaft (35) extending outwards from at least one end of the cylinder body (32), the protruding shaft (35) being provided with a rotary shaft hole (34) and at least one protruding shaft oil guiding hole; the spindle hole (34) is suitable for mounting a spindle (1); the oil guide hole of the protruding shaft (35) penetrates through the side wall of the protruding shaft (35) and is communicated with the rotating shaft hole (34); the pump body structure further includes:

at least one external circular mating structure provided with a mating hole (711) suitable for housing the male shaft (35); the aperture of the matching hole (711) is smaller than the outer diameter of the cylinder (3); the cylinder (3) rotates relative to the excircle matching structure;

The outer circle matching oil guide groove (91) is formed in the hole wall of the matching hole (711), and the hole wall of the matching hole (711) extends from one end of the cylinder body (32) towards the other end of the cylinder body (32); or the excircle matching oil guide groove (91) is arranged on the outer peripheral surface of the protruding shaft (35), and one end connected with the cylinder body (32) by the protruding shaft (35) extends to one end far away from the cylinder body (32).

21. Pump body structure of a rotary cylinder piston compressor according to claim 20, characterized by further comprising an outer circular mating oil reservoir (92) in the shape of a ring, said outer circular mating oil reservoir (92) being provided on the wall of said mating hole (711) and/or on the outer circumferential surface of said male shaft (35); the outer circle matching oil storage groove (92) is communicated with one end, facing the cylinder body (32), of the outer circle matching oil guide groove (91).

22. A rotary cylinder piston compressor comprising a pump body structure of the rotary cylinder piston compressor of any one of claims 1-21.