CN215762251U

CN215762251U - Compressor pump body oil suction pipe, oil suction device, pump body assembly and compressor

Info

Publication number: CN215762251U
Application number: CN202121642916.9U
Authority: CN
Inventors: 陈莹; 王柳青; 孟阳国; 刘振; 张小伟; 左文龙
Original assignee: Gree Electric Appliances Inc of Zhuhai; Zhengzhou Landa Compressor Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Zhengzhou Landa Compressor Co Ltd
Priority date: 2021-07-16
Filing date: 2021-07-16
Publication date: 2022-02-08
Anticipated expiration: 2031-07-16

Abstract

The utility model provides an oil suction pipe of a compressor pump body, an oil suction device, a pump body assembly and a compressor, relates to the technical field of compressors, and solves the technical problem that interference is difficult to control because the existing oil suction pipe and a crankshaft are in interference fit. The oil suction pipe of the compressor pump body comprises a pipe body and clamping jaws, wherein the clamping jaws are arranged at one end of the pipe body and gradually expand along the radial direction of the pipe body; the clamping jaws have a natural state of radial expansion and an elastic contraction state of matched connection with an inner hole of the crankshaft. The front end of the oil suction pipe of the compressor pump body is designed into a clamping jaw structure, the clamping jaw is elastically compressed and tightened to open and then pressed into the inner hole of the crankshaft during installation, and the oil suction pipe of the compressor pump body is ensured to be firmly installed by means of tight fit of the elastic force of the clamping jaw and the inner hole of the crankshaft; because the interference fit mode is cancelled, copper scraps are avoided, and potential quality hazards are avoided; and because interference fit is not adopted, the interference range does not need to be controlled, and the part machining cost is reduced.

Description

Compressor pump body oil suction pipe, oil suction device, pump body assembly and compressor

Technical Field

The utility model relates to the technical field of compressors, in particular to a compressor pump body oil suction pipe, an oil suction device, a pump body assembly and a compressor.

Background

The pump body component is the heart of the compressor, and the motor drives the crankshaft to rotate so as to compress and pressurize the refrigerant. All moving parts can generate heat by friction in the operation process, and at present, the parts of the pump body assembly are mainly lubricated and cooled by using refrigeration oil. Some machine type crankshaft minor axis on the market at present are equipped with oil absorption pipe, insert oil absorption pipe compressor bottom, and the high-speed rotatory in-process of bent axle is through oil absorption pipe, oil guide piece with freezing oil suction upper portion realize the lubrication of pump body spare part, cooling.

The oil suction pipe 01 and the inner hole of the crankshaft 2 are in interference fit in the existing structure, and the oil suction pipe 01 is pressed into the inner hole of the crankshaft 2 by adopting a positioning tool during assembly (the structure of the oil suction pipe 01 and the assembly structure of the oil suction pipe 01 and the crankshaft 2 are shown in figures 1-3). The interference of the matching mode is difficult to control: if the interference is large, the oil suction pipe 01 is difficult to press in, a copper pipe is easily scratched in the process of pressing the oil suction pipe 01, copper scraps are easily generated, and potential quality hazards are generated; if the interference is small, the assembly reliability is difficult to ensure, and the size tolerance range of the part is small when the interference range is small, so that the part processing cost is increased. In addition, the oil suction pipe 01 is made of copper materials so as to be convenient to press in, and the cost is increased.

The applicant has found that the prior art has at least the following technical problems:

the oil suction pipe 01 and the crankshaft 2 are in interference fit, and interference is difficult to control.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an oil suction pipe of a compressor pump body, an oil suction device, a pump body assembly and a compressor, and at least solves the technical problem that interference is difficult to control because the oil suction pipe and a crankshaft are in interference fit in the prior art. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the utility model are described in detail in the following.

In order to achieve the purpose, the utility model provides the following technical scheme:

the utility model provides an oil suction pipe of a compressor pump body, which comprises a pipe body and clamping jaws, wherein the clamping jaws are arranged at one end of the pipe body and are gradually expanded along the radial direction of the pipe body; the clamping jaws have a natural state of radial expansion and an elastic contraction state of matched connection with an inner hole of the crankshaft.

Optionally, the clamping jaw comprises a plurality of elastic sheets, and each elastic sheet axially and obliquely extends from the end of the pipe body.

Optionally, a plurality of the shrapnels are uniformly distributed along the circumference of the pipe body.

Optionally, the jaws are integrally formed with the tube body.

Optionally, the jaws are made of a resilient metal material.

Optionally, the compressor pump body oil suction pipe is made of carbon steel.

The oil suction device provided by the utility model comprises a crankshaft and any one of the compressor pump body oil suction pipes, wherein the compressor pump body oil suction pipe is tightly assembled in an inner hole of the crankshaft through the resilience effect of the clamping jaw.

Optionally, the depth of the oil suction pipe of the compressor pump body extending into the inner hole of the crankshaft is greater than the length of the clamping jaw.

The utility model provides a pump body assembly which comprises the oil suction device.

The utility model provides a pair of compressor, including foretell pump body subassembly.

The utility model provides an oil suction pipe of a compressor pump body, which comprises a pipe body and clamping jaws, wherein the clamping jaws are arranged at one end of the pipe body and are gradually expanded along the radial direction of the pipe body; the clamping jaws have a natural state of radial expansion and an elastic contraction state of matched connection with an inner hole of the crankshaft. The front end of the oil suction pipe of the compressor pump body is designed into a clamping jaw structure, the clamping jaw is elastically compressed and tightened to open and then pressed into the inner hole of the crankshaft during installation, and the oil suction pipe of the compressor pump body is ensured to be firmly installed by means of tight fit of the elastic force of the clamping jaw and the inner hole of the crankshaft; because the interference fit mode is cancelled, copper scraps are avoided, and potential quality hazards are avoided; and because interference fit is not adopted, the interference range does not need to be controlled, and the part machining cost is reduced.

According to the utility model, after the novel compressor pump body oil suction pipe is adopted in the oil suction device and the pump body assembly, copper scraps are avoided, pump body parts can be timely and reliably lubricated and cooled, and the stability and reliability of the operation of the device are improved, so that the reliable operation of the compressor is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic cross-sectional view of a prior art oil suction pipe;

FIG. 2 is a schematic view of the connection of a prior art oil suction pipe to a crankshaft;

FIG. 3 is a schematic view of a portion of the enlarged structure of FIG. 2;

FIG. 4 is a schematic cross-sectional view of an oil suction pipe of a compressor pump body according to an embodiment of the present invention;

FIG. 5 is a schematic side view of an oil suction pipe of a compressor pump according to an embodiment of the present invention;

FIG. 6 is a schematic structural view of a crankshaft provided in accordance with an embodiment of the present invention;

FIG. 7 is a schematic sectional view of the connection between the oil suction pipe and the crankshaft of the compressor pump body according to the present invention;

FIG. 8 is a schematic structural diagram of an oil guiding plate according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of an oil absorption device according to an embodiment of the present invention;

FIG. 10 is a schematic structural view of a pump body oil suction pipe of a compressor before being pressed into a crankshaft according to an embodiment of the present invention;

fig. 11 is a schematic structural view of a compressor pump oil suction pipe according to an embodiment of the present invention after being pressed into a crankshaft by a tool;

FIG. 12 is a partial enlarged structural view of portion I of FIG. 11;

fig. 13 is a schematic structural view of a compressor according to an embodiment of the present invention;

FIG. 14 is a schematic illustration in partial cross-sectional view of a crankshaft in accordance with an embodiment of the present invention;

FIG. 15 is a schematic cross-sectional view of a second compressor pump body oil suction tube according to an embodiment of the present invention;

fig. 16 is a schematic side view of a second compressor pump body oil suction pipe according to an embodiment of the present invention.

In the figure 01, a prior art oil suction pipe; 1. an oil suction pipe of a compressor pump body; 11. a spring plate; 2. a crankshaft; 3. an oil guide sheet; 4. fixing the tool; 5. a movable tool; 6. a refrigeration oil; 7. a partition plate; 8. a roller; 9. the motor assembly is driven.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

The utility model provides an oil suction pipe 1 of a compressor pump body, which comprises a pipe body and clamping jaws, wherein the clamping jaws are arranged at one end of the pipe body and are gradually expanded along the radial direction of the pipe body; the jaws have a natural state of radial expansion and an elastic contraction state of matching connection with the inner hole of the crankshaft 2.

The front end of the oil suction pipe 1 of the compressor pump body is designed into a clamping jaw structure, the clamping jaw is elastically compressed and tightened to open and then pressed into an inner hole of the crankshaft 2 during installation, and the oil suction pipe 1 of the compressor pump body is ensured to be firmly installed by means of tight fit of the elastic force of the clamping jaw and the inner hole of the crankshaft 2; because the interference fit mode is cancelled, copper scraps are avoided, and potential quality hazards are avoided; and because interference fit is not adopted, the interference range does not need to be controlled, and the part machining cost is reduced.

As an alternative embodiment, as shown in fig. 4, the clamping jaw includes a plurality of elastic sheets 11, and each of the plurality of elastic sheets 11 extends axially and obliquely from the end of the tube body, that is, the clamping jaw is in an open state in a natural state, and further can provide an elastic force in a deformed and contracted state, so that the clamping jaw is firmly matched with the crankshaft 2.

As an alternative embodiment, a plurality of shrapnels 11 are evenly distributed along the circumference of the tube body, see fig. 5. The uniform distribution mode is adopted, the gripping force provided for the wall surface of the inner hole of the crankshaft 2 in each direction is the same, and the connection is reliable.

As an optional implementation mode, the clamping jaws are integrally formed on the pipe body, the mechanical strength is high, the processing is convenient, and the product consistency is good. Of course, other fastening means such as welding may be used.

As an alternative embodiment, the jaws are made of elastic metal material, which saves cost compared with the existing oil suction pipe 01 made of copper material. Of course, other elastomeric materials, such as injection molded materials, may be used.

More specifically, the oil suction pipe 1 of the compressor pump body is made of carbon steel, so that the cost is low.

Example 1:

as shown in fig. 4 and 5, the oil suction pipe 1 of the compressor pump body is of an integral structure, the plurality of elastic sheets 11 at the front end of the pipe body are directly outwards opened, the processing requirement is low, the whole processing process is simple and convenient, and the processing cost is low. The structure of the crankshaft 2 is shown in fig. 6, and the state after the oil suction pipe 1 of the compressor pump body is pressed into the crankshaft 2 is shown in fig. 7.

As shown in figure 7, when the oil suction pipe 1 of the compressor pump body is installed, the front end elastic sheet 11 is propped against the inner hole step of the crankshaft 2, so that the pressing-in depth is ensured. And because the oil suction pipe 1 of the compressor pump body is arranged in the inner hole of the crankshaft 2 without shielding the end surface of the crankshaft 2, the end surface of the crankshaft 2 is exposed, and the pump body and the rotor component in the later process are convenient to fit.

Example 2:

as shown in fig. 9, the present invention further provides an oil suction device, which comprises a crankshaft 2, an oil guiding sheet 3 and any one of the above compressor pump body oil suction pipes 1, wherein the compressor pump body oil suction pipe 1 is tightly assembled in an inner hole of the crankshaft 2 through the resilience of the clamping jaws. The structure of the oil guiding plate 3 is shown in fig. 8.

As can be seen from fig. 9, the depth of the oil suction pipe 1 of the compressor pump body extending into the inner hole of the crankshaft 2 is greater than the length of the claw, so as to ensure that the frozen oil 6 does not leak out of the claw.

The utility model also provides a pump body assembly which comprises any one of the oil suction devices.

Example 3:

as shown in fig. 13, the present invention also provides a compressor including the pump body assembly described above.

After the novel compressor pump body oil suction pipe 1 is adopted by the oil suction device and the pump body assembly, copper scraps are avoided, pump body parts can be timely and reliably lubricated and cooled, and the running stability and reliability of the device are improved, so that the reliable running of the compressor is ensured.

The crankshaft 2 of the present invention is structurally unchanged from the prior art crankshaft 2. The short shaft of the crankshaft 2 is provided with a stepped hole, the length L of which is D1 and D1 and the length L of which is D2 (as shown in FIG. 14). The oil suction pipe 1 of the pump body of the compressor adopts a steel pipe with the diameter of D4, wherein the front end (the left side of figure 4) is provided with a notch to form a jaw, the jaw at the front end is opened, the maximum outer diameter of the opening section is D5, wherein D4 is less than D1, and D5 is more than D1.

During installation, the oil guide sheet 3 is firstly installed in an inner hole of the crankshaft 2, the oil suction pipe 1 of the pump body of the compressor is pressed into the inner hole of the crankshaft 2 by means of a special tool, the limiting is realized by a step surface between D1 and D2, and the depth L is ensured (as shown in the above figures 9 and 14). The value depth L of a certain model is 13mm, and the connection firmness can be ensured within the range of 10mm-13mm in practical application.

After the compressor is powered on, the driving motor assembly 9 drives the crankshaft 2 to rotate, the oil suction pipe 1 and the oil guide piece 3 of the compressor pump body synchronously rotate, the oil guide piece 3 is of a spiral structure, the frozen oil 6 can be brought up along the inner hole of the crankshaft 2 in the rotating process and thrown up to the upper end, and the frozen oil 6 flows out from the small hole in the upper end of the crankshaft 2 to enter the pump body assembly to cool the partition plate 7 and the roller 8.

The processing process of the oil suction pipe 1 of the pump body of the compressor comprises the following steps: the circular thin-wall steel pipe with the outer diameter D4(D4 is slightly smaller than the inner bore diameter D1 of the crankshaft 2) can be used for processing: segmenting according to the required fixed length → utilizing a mould to make the tail end of the finished product into a hemisphere (reserved hole) → front end slotting → using a conical tool to jack in the slotting part, so that the front end is opened to form the elastic sheet 11, and the maximum outer diameter D5 of the opening section is larger than D5 and larger than D1.

During installation, the oil guide plate 3 is firstly installed in an inner hole of the crankshaft 2, as shown in fig. 10, the inner diameter D6 of the fixing tool 4 is slightly larger than the outer diameter D4 of the oil suction pipe, along with the fact that the oil suction pipe is plugged into the fixing tool 4, the maximum outer diameter D5 of the elastic sheet 11 at the front end of the oil suction pipe 1 of the compressor pump body is continuously contracted to be D5' < the inner hole D1 of the crankshaft 2, and a partial enlarged structure of a part I in fig. 10 is shown in fig. 11. As shown in fig. 12, the movable tool 5 acts to press the contracted oil suction pipe 1 of the compressor pump body into the inner hole of the crankshaft 2 to a depth L, and the oil suction pipe 1 of the compressor pump body is firmly installed by the interaction force between the elastic sheet 11 and the inner hole of the crankshaft 2.

Because the hollow part is completely arranged in the short shaft of the crankshaft 2, the refrigerant oil 6 cannot leak through the hollow part, and the equivalent function of the original structure can be realized. The oil suction pipe elastic sheet 11 can shrink in the loading process, so that impurities generated by hard extrusion are avoided.

According to the installation strength requirement and the processing difficulty of the compressor pump body oil suction pipe 1, the number of the elastic sheets 11 at the front end of the compressor pump body oil suction pipe 1 can be changed (as shown in fig. 15 and 16, 4 elastic sheets 11 are adopted). The compressor pump body oil suction pipe 1 can be processed by using a circular thin-wall steel pipe with the outer diameter D4: segmenting according to the required fixed length, shaping the front end of the cylindrical semi-finished product into a hemisphere (reserved hole) by using a die, slotting the front end, pushing the shaping tool into the slotting part, and expanding the front end to form an elastic sheet 11 and the maximum outer diameter D5 of the expanding section, wherein D4 is less than D1, and D5 is more than D1.

The front end of the oil suction pipe 1 of the compressor pump body is designed into a claw structure formed by the elastic sheets 11, the front end elastic sheets 11 are compressed and tightened to open during installation, and after the front end elastic sheets are pressed into an inner hole of the crankshaft 2, the oil suction pipe is ensured to be firmly installed by means of the interaction force between the elastic sheets 11 and the inner hole of the crankshaft 2. The oil suction device cancels an interference fit mode, avoids copper scraps and avoids the potential quality hazard of the original structure; meanwhile, the oil suction pipe can be changed into carbon steel, so that the cost is saved.

In the description of the present invention, it is to be noted that "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing and simplifying the description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The oil suction pipe of the compressor pump body is characterized by comprising a pipe body and clamping jaws, wherein the clamping jaws are arranged at one end of the pipe body and gradually expand along the radial direction of the pipe body; the clamping jaws have a natural state of radial expansion and an elastic contraction state of matched connection with an inner hole of the crankshaft.

2. The compressor pump body oil suction pipe according to claim 1, wherein the claw comprises a plurality of resilient pieces, each of the plurality of resilient pieces extending obliquely in an axial direction from the end portion of the pipe body.

3. The compressor pump body oil suction pipe according to claim 2, wherein a plurality of the resilient pieces are uniformly distributed along a circumferential direction of the pipe body.

4. The compressor pump body oil suction pipe of claim 1, wherein the jaws are integrally formed with the pipe body.

5. The compressor pump body oil suction pipe of claim 1, wherein the jaws are made of a resilient metal material.

6. The compressor pump body oil suction pipe of claim 1, wherein the compressor pump body oil suction pipe is made of carbon steel.

7. An oil suction device comprising a crankshaft and the compressor pump body oil suction pipe of any one of claims 1 to 6, which is tightly fitted to an inner bore of the crankshaft by a resilient action of the jaws.

8. An oil suction device according to claim 7 wherein the depth of the compressor pump body oil suction pipe extending into the crankshaft bore is greater than the length of the pawl.

9. A pump body assembly comprising an oil suction device as claimed in claim 7 or 8.

10. A compressor comprising the pump body assembly of claim 9.