JPH08177738A - Rotary compressor - Google Patents

Abstract

PURPOSE: To provide a rotary compressor by which an installing structure of an oil separating member is simplified and the number of part items to install the oil separating member is also reduced and which is excellent in assembling workablity. CONSTITUTION: An oil separating member 50 is provided with a disk part 56, a cylinder part 58 to be inserted into an inside diameter part 52 of a rotor 14 and locking parts 60 which are integrally arranged on the cylinder part 58 and can engage only in one direction with locking step parts formed in the inside diameter part of the rotor, and an elastic energizing means 64 is arranged to elastically energize the oil separating member 50 in the engaging direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary compressor of the type in which an oil separating member is attached to the discharge pipe side of a rotor,
In particular, the present invention relates to a rotary compressor that improves the workability of mounting an oil separation member and reduces the number of parts.

[0002]

2. Description of the Related Art Conventionally, in a rotary compressor, an electric motor section and a compression section are housed in a hermetically sealed case, and a shaft for transmitting driving force to the compressor section is inserted into a rotor of the electric motor section.

In the rotary type compressor having such a structure,
Since the oil that lubricates the compression section is discharged together with the discharge gas during operation, this increase in the amount of discharged oil causes a decrease in heat conduction in the refrigeration cycle and a decrease in the efficiency of the refrigeration cycle, and also in the sealed case. The deterioration of the oil level in the will adversely affect the reliability of the compression part.

For this reason, conventionally, in order to suppress the oil discharge amount as much as possible, an oil separating member for separating the oil mixed with the gas is provided on the path for guiding the compressed gas to the discharge pipe.

FIG. 16 shows, as a conventional example, Jpn.
It is a figure showing the oil separation device indicated by 511 gazette. In this oil separation device, the oil separation disk 2 is used as an oil separation member, and the oil separation disk 2 is attached to the upper part of the rotor. The oil separation disk 2 is fitted to the stepped small diameter portion 4 of the hollow sleeve 3 mounted on the rotor via a spring body 5 such as a wave washer, and further, to the stepped small diameter portion 4 like a C-shaped snap ring. The spring body 5 is fixed so as to be pressed by its elastic force by using a retaining ring 7.

[0006]

However, the conventional oil separating member mounting structure requires fine parts such as the hollow sleeve 3, the spring body 5, and the retaining ring 7. In the actual assembling work, after the oil separation disk 2 is fitted into the hollow sleeve 3, the retaining ring 7 is attached to the circumferential groove 6 by using a tool.
It had to be fitted to, and its assembling workability was not good.

Therefore, an object of the present invention is to solve the problems of the prior art, simplify the mounting structure of the oil separating member, and reduce the number of parts for mounting the oil separating member.
It is to provide a rotary compressor having excellent assembling workability.

[0008]

In order to achieve the above-mentioned object, the present invention has a hermetic casing in which a compression section and an electric motor section for driving the compression section are housed. In a rotary compressor in which a discharge pipe for discharging compressed gas is provided and an oil separation member is attached to the discharge pipe side of the rotor of the electric motor, the oil separation member is inserted into the disk portion and the inner diameter portion of the rotor. And a locking portion that is integrally formed with the cylindrical portion and that can engage with a locking step formed on the inner diameter portion of the rotor only in one direction. It is characterized in that an elastic biasing means for elastically biasing is provided on the.

In the above structure, the engaging portion is a claw portion cut and raised from the disk portion side so as to project outward in the radial direction on the outer peripheral surface of the cylindrical portion fitted to the inner diameter portion of the rotor in the oil separating member. It is configured by forming a plurality of.

Further, a ring member provided on the elastic biasing means with a plurality of elastic legs fitted on the cylindrical portion,
A coil spring or a corrugated washer that is fitted onto the cylindrical portion may be used.

Further, in the above construction, it is desirable to provide a rotation preventing means for preventing relative rotation between the oil separating member and the ring member.

Further, the elastic urging means causes the oil separating member to be bent by abutting the tips of the legs integrally extending from the outer peripheral portion of the disk portion of the oil separating member against the end surface of the rotor. It can be configured to obtain a biasing elastic force.

Further, in the above structure, the inner diameter of the end plate of the rotor end is made smaller than the inner diameter of the rotor core, so that a plurality of claws provided on the cylindrical portion of the oil separating member are provided. It is possible to form a locking step portion with which the portion can engage and to allow the cylindrical portion of the oil separating member to be seated on the end plate of the rotor end portion at the position of the tip of the claw portion.

The end plate of the rotor end can be formed by a part of the upper laminated plate of the rotor core, and the inner diameter of the rotor core is provided with a recessed portion that allows the pawl portion to escape. Is preferred.

[0015]

When the cylindrical portion of the oil separating member is inserted into the inner diameter portion of the rotor until the locking portion exceeds the locking step portion on the rotor side, the locking portion of the cylindrical portion is engaged by the elastic force of the elastic biasing means. At the same time, since the engaged state is maintained, the work can be mounted with good workability only by inserting the oil separation member.

Further, the locking portion is provided integrally with the cylindrical portion, and the elastic biasing means is provided integrally with the oil separating member as in the invention described in claim 6, or the invention is described in claim 8. Since the end plate portion having the locking step portion can be formed of a part of the laminated plate of the rotor core as in the invention, the number of parts required for mounting and fixing the oil separation member can be reduced.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a rotary compressor according to the present invention will be described below with reference to the accompanying drawings. Figure 1
FIG. 1 is a vertical sectional view of the entire vertical rotary compressor according to this embodiment. Reference numeral 10 is a closed casing, 11 is an electric motor section, and 1
Reference numeral 2 represents a compressor section. The electric motor unit 11 is composed of a stator 13 fixed to the inner peripheral surface of the closed casing 10 and a rotor 14 that is rotatably loosely fitted inside the stator 13. A crankshaft 15 is joined to the rotor 14, and the crankshaft 15
Is rotatably supported by the main bearing 16 and the sub bearing 17 on the compressor section 12 side.

The compressor section 12 is of a two-cylinder type, in which a first cylinder 18 and a second cylinder 19 are connected in a continuous manner with a partition plate 20 interposed therebetween, and these are integrally formed by a frame member 21. It is fixed to the closed casing 10. Also, the crankshaft 15 has
An eccentric first crank portion 22 and a second crank portion 23 are provided, and inside the first cylinder 18, the first crank portion 22 and a first roller 24 fitted onto the first crank portion 22 are housed.
Inside the second cylinder 19, the second crank portion 23 and the second crank portion 23
A roller 25 is housed.

In the compressor section 12, the first cylinder 18 and the second cylinder 19 are each fitted with blades slidably in the radial direction. In FIG. 1, among these blades, the blade 28 provided in the second cylinder 19 is shown. First cylinder 18, second cylinder 19
In the inside, the volume of the compression chamber defined by the rollers 24 and 25 and the blade changes as the rollers 24 and 25 eccentrically rotate, and the gas sucked from the suction pipes 40 and 41 is compressed.

On the side of the auxiliary bearing 17, the valve cover 30
Are fixed to the sub bearing 17 by bolts 31. Similarly, on the main bearing 16 side, the valve cover 32
Is attached to the main bearing 16 and the valve cover 3
2 is covered with a muffler 33 and both are bolt 3
It is fixed using 4.

On the other hand, the discharge pipe 36 is connected to the upper end of the closed casing 10 on the compressor section 11 side.

The gas compressed in the second cylinder 19 is discharged from the discharge valve 37, and then is perforated in the sub bearing 17, the second cylinder 19, the partition plate 20, the first cylinder 18, and the main bearing 21. It is discharged into the motor chamber A from a passage (not shown) through the muffler 33. In addition, the first cylinder 18
The gas compressed by the valve is discharged from the discharge valve 38 to the valve cover 3
2 is similarly discharged from the inside of the muffler 33 into the motor chamber A. In the motor chamber A, the gas passes through a gas passage 53 (see FIG. 2) formed in the axial direction of the rotor 14 and is led to the side where the oil separation disk 50 as an oil separation member is attached, and the oil separation is performed. After the oil mixed with the gas is separated on the disk 50, it is discharged from the discharge pipe 36 to the external refrigeration cycle.

In FIG. 1, reference numeral 39 indicates a strainer.

Next, the mounting structure of the oil separation disk 50 will be described in detail with reference to the accompanying drawings starting from FIG. FIG. 2 is an exploded view of the oil separation disk 50.
The rotor 14 is formed by laminating a large number of disk-shaped iron plates 51 having a hole at the center thereof and caulking each other using rivets to form a rotor core. As an inner diameter portion of the rotor iron core, a shaft hole 52 into which the crankshaft 15 is inserted is formed, and a gas passage 53 for guiding the compressed gas and each iron plate 51 are formed concentrically with the shaft hole 52. Rivet holes 54 for inserting rivets for fastening are formed so as to penetrate axially at four locations.

On the other hand, the oil separation disk 50 is a metal part, and a disk part is formed from a flange part 57 at the upper end of a body 56 in the shape of a mortar, and a shaft hole 52 of the rotor 14 is formed on the lower side.
A cylindrical portion 58 having an outer diameter dimension that allows loose fitting is coaxially integrally formed. On the outer peripheral portion of the cylindrical portion 58, a plurality of claw portions 60 formed by partially cutting and raising the peripheral wall of the cylindrical portion 58 from the top to the outside in the radial direction are provided as engaging portions with the rotor 14. The portion 60 is not engaged when it is inserted into the rotor 14, but is engaged with an end plate 62 that forms the end surface of the rotor 14 when pulled in the opposite pulling direction.

The ring member 64, which uses the oil separating disk 50 as an elastic biasing means in the engaging direction, is made of a highly elastic metal material such as steel, and is 90 ° from each other from the short cylindrical portion 65 forming the main body. The leg portions 66 that are radially outwardly opened are integrally formed. These legs 66
Extends downwardly so that the short cylindrical portion 65 can be supported in a state of being floated from the surface of the end plate 62. The short cylindrical portion 6
The inner diameter of 5 is such that the cylindrical portion 58 of the oil separation disk 50 can be loosely fitted.

FIG. 3 is a view showing a state in which the oil separation disk 50 is attached to the upper end surface side of the rotor 14 via the ring member 64. Since the diameter DE of the circular hole formed coaxially with the shaft hole 52 in the end plate 62 is smaller than the diameter DR of the shaft hole 52 of the rotor 14, the claw 60 is engaged. A locking step 67 is formed so that they can be fitted together.

Therefore, as shown in FIG.
When the ring member 64 is placed on the end plate 62 such that the core is aligned with the shaft hole 52 of No. 4, and the cylindrical portion 56 of the oil separation disk 50 is press-fitted from above the ring member 64, the claw 60 causes the end plate to move. The position where it can be engaged with the step 67 of 62 is reached.
At this position, the claw 60 is locked by the locking step 67 and cannot be removed, so that the oil separation disk 50 is attached so as not to come off on the upper end surface side of the rotor 14. In this fixed state, the leg portions 66 of the ring member 64 each urge the oil separation disk 50 in the upward engaging direction by its elastic force, and as a result, the engagement state between the claw 60 and the stepped portion 67 becomes stronger. Held in.

Next, another modification of the ring member 64 is shown in FIGS. In the ring member 70 shown in FIG. 4, the lower end of the cylindrical portion 65 serves as a boss portion 71, and the leg portions 66 extend integrally outward from the boss portion 71 in the radial direction. By providing such a boss portion 71, there is an advantage that the rigidity of the ring member 64 can be significantly enhanced.

On the other hand, FIG. 5 shows the oil separating disk 5
It is a figure which shows the structure of the ring member 72 which added the structure for the rotation stop of 0. That is, in the ring member 72 of this modified example, the recess 73 that is recessed radially outward is formed on the inner peripheral surface of the ring member 72. On the other hand, a convex portion 74 is formed on the outer peripheral surface of the cylindrical portion 58 of the oil separation disk 50.

Therefore, the convex portion 74 on the oil separating disk 50 side
Since the positional relationship between the oil separation disk 50 and the ring member 72 is first determined by fitting the ring member 72 in the recess 73 on the ring member 72 side, the ring member 72 can be prevented from rotating after being attached to the rotor 14. Therefore, the leg portion 66 of the ring member 72 rides on the rivet of the rotor assembly and an unreasonable force is applied, or the leg portion 66 causes
It is possible to prevent the inconvenience that the gas passage 53 is blocked at the rotor end surface.

Next, FIG. 6 shows the elastic urging means shown in FIG.
Instead of the ring member 50 shown in FIG.
0 is a modified example, and FIG. 5 is a modified example in which the corrugated washer 82 is used as the elastic biasing means. In each of these, the elastic biasing means is configured as a separate component from the oil separation disk 50. On the other hand, as shown in FIG. 8, the elastic biasing means may be constructed as an integrated structure with the oil separation disk 50. In this case, the elastic biasing means forms cut-and-raised pieces 84 in which a part of the side wall of the cylindrical portion 58 of the oil separation disk 50 is cut and raised outward at several places, and these cut-and-raised pieces 84 are separated by the oil separation. When the disk 50 is attached, the tip end of the disk 50 contacts the end plate 62 to bend, and the elastic force of the disk 50 urges the oil separation disk 50 to firmly hold the engagement state between the claw 60 and the step 67.

Next, another embodiment of the present invention will be described with reference to FIG.
A description will be given with reference to the following. The same constituent elements as those in the first embodiment represent the same constituent elements, and detailed description thereof will be omitted. In this embodiment, the oil separation disk itself is provided with the elastic biasing means, and the oil separation disk can be attached without using a separate ring member or the like. In FIG. 9, the flange portion 102 of the oil separation disk 100 is configured to have a considerably large radius relative to the cylindrical portion 103. This brim 102
In the mounted state, the tip end abuts on the end plate 62 on the rotor 14 side from the outer periphery of the so that the height HD of the collar portion 102 becomes high.
A plurality of leg portions 104 that secure the above are formed so as to hang down. In the present embodiment, the position of the leg portion 104 is provided at a position symmetrical with respect to the center at an angle of 120 degrees, and is configured so that the oil separation disk 100 can be mounted in a stable posture.

On the other hand, the collar portion 102 has a rotor 14
When the end plate 62 is inserted into the shaft hole 52 of the end plate 62,
The stepped portion 106 which is seated on the opening edge of the hole is continuously provided, and the cylindrical portion 103 is integrally connected to the tip of the stepped portion 106.

On the outer circumference of the cylindrical portion 103, claw portions 60 formed by cutting and raising are provided symmetrically at three places at 120 degrees, and the inner diameter of the end plate 62 and the shaft hole 52 of the rotor 14 are formed. The locking step portion 67 is formed from the difference in the inner diameter, and the claw 60 is engaged with the locking step portion 67 as in the first embodiment described above.

According to this embodiment, the oil separation disk 10
When 0 is inserted 52 into the shaft hole of the rotor 14, the claw portion 60 reaches a position where it engages with the locking step portion 67 of the end plate 62, and the oil separation disk is attached so as not to come off. Also, the legs 104
When the oil comes into contact with the upper surface of the end plate 62 and is further pressed into the end plate 62, the elastic force of the leg portion 104 and the collar portion 102 itself causes the pawl 60, which is the upward direction of the entire oil separation disk 100, to engage the pawl 60. Since it is urged in the direction to engage with the portion 67, it acts similarly to the ring member 64 of the first embodiment and can firmly fix the oil separation disk 100.

Next, FIG. 10 is a diagram showing another modification,
In the case of this modification, the inner diameter of the end plate 62 of the rotor 14 is DE
, And the inner diameter of the rotor 14 is DR, a large-diameter hole having an inner diameter D0 is formed by laminating an iron plate having an inner diameter D0 on the upper iron plate of the rotor 14 and the claw 60 has a locking step portion of the end plate 62. The structure makes it easy to engage with 67.

In order to form such a locking step 67, as shown in FIG. 11, an iron plate having two cutouts 110 of the same shape formed symmetrically on the lower side of the end plate 62 is used. It is also possible to stack a plurality of sheets to form a space for allowing the claw portion 60 of the oil separation disk 100 to escape and to form the locking step 67. In this embodiment, the movement of the pawl 60 is limited to the inside of the notch 110, so that the oil separating disk 10
It acts as a detent that blocks the rotation of 0. Also, by notching a part of the iron plate, it punches out as compared with the case where the whole is processed along the inner circumference, and the stacking accuracy is good without impairing the effect of the pilot pin used for the final positioning of stacking. Has the advantage of being kept at. As the material of the iron plate provided with the notch, a material having a hardness higher than that of the iron plate of the other portion is used, which is suitable because the claw 60 can be prevented from being worn and the like.

Further, as shown in FIG. 12, the notches can be installed in a stable posture in addition to the detent of the oil separation disk 100 by providing the cutouts at three positions symmetrical with respect to each other.

The above is the embodiment in which the end plate 62 is provided in the uppermost layer of the rotor 14, but in FIG. 13A, instead of the end plate 62, the inner diameter DE of the lower iron plate in the uppermost layer is set as the axial hole. 52 inner diameter D
The locking step 120 may be formed by providing an iron plate 112 having an inner diameter slightly smaller than R.

Next, FIG. 14 shows that the shaft hole 52 of the rotor 14 has a straight inner diameter and the bush member 122 has the end plate 6 formed therein.
A modified example in which the shaft hole 52 is inserted and attached on the lower side of FIG. As shown in FIG. 15, a space portion 124 is formed in the inner diameter portion of the bush member 122 to allow the claw 60 to escape and to prevent the oil separation disc 100 from rotating.

[0042]

As is apparent from the above description, according to the present invention, the oil separating member is provided integrally with the disk portion, the cylindrical portion inserted into the inner diameter portion of the rotor, and the cylindrical portion. A locking step portion formed on the inner diameter portion of the rotor is provided with a locking portion that can be engaged only in one direction, and elastic biasing means for elastically biasing the oil separating member in the engaging direction is provided. Since the cylindrical part of the oil separation member is inserted into the inner diameter of the rotor until the locking part exceeds the locking step on the rotor side, the locking part engages with the locking step and further elastic Since the engagement state is maintained by being biased by the biasing means, the work can be mounted with good workability only by inserting the oil separation member.

Further, the locking portion is provided integrally with the cylindrical portion, and the elastic means can be provided integrally with the oil separating member as in the invention described in claim 6, or in the eighth aspect. Since the end plate portion having the locking step portion can be formed of a part of the laminated plate of the rotor core as in the invention described above, the number of parts required for mounting and fixing the oil separation member can be reduced.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing the overall structure of a vertical rotary compressor according to an embodiment of the present invention.

FIG. 2 is an exploded view of the assembly structure of the oil separating member.

FIG. 3 is a cross-sectional view showing a state in which an oil separating member is attached to a rotor.

FIG. 4 is a view showing a modified example of a ring member used as an elastic biasing means.

FIG. 5 is a view showing a structure of an oil separation member and a ring member to which a rotation stopping means is added.

FIG. 6 is a partial cross-sectional view showing an embodiment using a coil spring as an elastic biasing means.

FIG. 7 is a partial cross-sectional view showing an embodiment in which a corrugated washer is used as the elastic biasing means.

FIG. 8 is a cross-sectional view of an embodiment in which a cut-and-raised part provided in a cylindrical portion of an oil separation member is used as an elastic biasing means.

FIG. 9 is a sectional view showing a main part of another embodiment of the present invention.

10 is a cross-sectional view showing a modified example of the inner diameter portion of the rotor in the embodiment of FIG.

FIG. 11 is a view showing a modified example in which a concave portion for releasing a claw is formed in the inner diameter portion of the rotor.

FIG. 12 is a view showing a modified example in which three recesses for letting out a claw are provided.

FIG. 13 is a view showing a modified example in which an end plate is not provided on the rotor.

FIG. 14 is a view showing a modified example in which a recess for letting out a claw is formed by using a bush of another member.

FIG. 15 is a sectional view showing the bush.

FIG. 16 is an assembly view showing a conventional oil separating member mounting structure. 10 Airtight casing 11 Electric motor part 12 Compressor part 13 Stator 14 Rotor 15 Crankshaft 18 1st cylinder 19 2nd cylinder 36 Suction pipe 50 Oil separation disk (oil separation member) 56 Disk part 57 Collar part 58 Cylindrical part 60 Claw (claw) 62) End plate 64 Ring member (elastic biasing means) 66 Leg 80 Coil spring (elastic biasing means) 82 Wave washer (elastic biasing means)

Claims (9)

[Claims] 1. A hermetically-sealed casing accommodates a compression section and an electric motor section for driving the compression section, and a discharge pipe for discharging compressed gas is provided on the electric-motor section side of the hermetically-sealed casing, and a rotor of the electric motor. In the rotary compressor in which the oil separating member is attached to the discharge pipe side, the oil separating member is
A disc portion, a cylindrical portion to be inserted into the inner diameter portion of the rotor, and a locking portion that is integrally provided with the cylindrical portion and that can be engaged only in one direction with a locking step portion formed in the rotor inner diameter portion. A rotary compressor provided with elastic urging means for elastically urging the oil separating member in the engaging direction. 2. The locking portion includes a plurality of claw portions cut and raised from the disk portion side so as to project radially outward from an outer peripheral surface of a cylindrical portion fitted to the inner diameter portion of the rotor of the oil separating member. The rotary compressor according to claim 1, wherein the rotary compressor is formed. 3. The rotary compressor according to claim 1, wherein the elastic biasing means comprises a ring member fitted to the cylindrical portion and provided with a plurality of elastic legs. 4. The rotary compressor according to claim 1, wherein the elastic biasing means comprises a coil spring or a corrugated washer fitted on the cylindrical portion. 5. The rotary compressor according to claim 3, further comprising a detent means for preventing relative rotation between the oil separating member and the ring member. 6. The oil separating member is attached to the elastic urging means by abutting a tip end of a leg portion integrally extending from an outer peripheral portion of a disk portion of the oil separating member against an end surface of a rotor to bend the end portion. The rotary compressor according to claim 1, wherein a biasing elastic force is obtained. 7. An inner diameter portion of an end plate of the rotor end portion has an inner diameter smaller than an inner diameter of the rotor iron core,
A locking step is formed on the cylindrical portion of the oil separating member to which a plurality of claws can engage, and the cylindrical portion of the oil separating member is seated on the end plate of the rotor end at the position of the tip of the claw. The rotary compressor according to claim 2 or 6, wherein the rotary compressor is configured as possible. 8. The rotary compressor according to claim 7, wherein the end plate of the rotor end portion is formed by a part of an upper laminated plate of the rotor core. 9. The rotary compressor according to claim 7, wherein a concave portion is formed in an inner diameter portion of the rotor core so as to allow the claw portion to escape.