KR0175182B1 - Rotative compressor - Google Patents

Abstract

The present invention relates to a rotary compressor of the type having an oil separating member attached to the rotor discharge tube, in particular a rotary compressor capable of improving the attachment workability of the oil separating member and reducing the number of parts.

The oil separating member 50 is provided with a cylindrical portion 58 inserted into the disk portion 56 and the inner diameter portion 52 of the rotor 14, and is integrally installed with the cylindrical portion 58 and has a portion inside the rotor. It is characterized in that it is provided with a support fixing part 60 that can be engaged only in one direction of the formed support fixing tomographic part and an elastic imparting means 64 for elastically applying a force in the direction of engaging the oil separating member 50. .

Description

Rotary compressors

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

2 is an exploded view showing the attachment structure of the oil separation member.

3 is a cross-sectional view showing a state where the oil separating member is attached to the rotor.

4 is a view showing a modification of the ring member used as the elastic imparting means.

5 is a view showing the structure of the oil separation member and the ring member with the rotation fixing means.

6 is a partial cross-sectional view showing an embodiment in which a coil spring is used as an elastic imparting means.

7 is a partial cross-sectional view showing an embodiment using a corrugated washer as an elastic imparting means.

8 is a cross-sectional view of an embodiment using a cut-out portion provided in the cylindrical portion of the oil separating member as the elasticity imparting means.

9 is a cross-sectional view showing essential parts of another embodiment of the present invention.

10 is a sectional view showing a modification of the inner diameter portion of the rotor in the ninth embodiment.

FIG. 11 is a view showing a modification in which a recess is formed so as to escape from the protrusion at the inner diameter of the rotor. FIG.

Fig. 12 is a diagram showing a modification in which three concave portions deviated from the projections are provided at three places.

13 is a view showing a modified example that knows not to install the end plate in the rotor.

FIG. 14 is a view showing a modification in which a recess is formed outside the protrusion by using a washer as a separate member. FIG.

Fig. 15 is a sectional view of the bush.

16 is an assembly view showing an attachment structure of a conventional oil separation member.

* Explanation of symbols for main parts of the drawings

10 sealed casing 11: electric motor part

12 compressor section 13 stator

14: rotor 15: crankshaft

18: first cylinder 19: second cylinder

36: suction pipe 50: oil separation disk (oil separation member)

56: disk portion 57: collar portion

58: cylinder 60: protrusion (projection)

62: end plate 64: ring member (elastic imparting means)

66: pedestal 80: coil spring (elastic imparting means)

82: corrugated washer (elastic imparting means)

The present invention relates to a rotary compressor of the type in which an oil separating member is attached to the rotor discharge tube, and more particularly, to a rotary compressor capable of improving the attachability of the oil separating member and reducing the number of parts.

In a conventional rotary compressor, an electric motor unit and a compressor are housed in a sealed case, and a rotor for transmitting driving force is fitted to the rotor of the motor unit.

In the rotary compressor having such a structure, the oil lubricating the compression unit is discharged together with the discharge gas during operation, so that the increase in the discharge flow rate causes a decrease in the thermal conductivity and the efficiency of the refrigerating cycle in the refrigeration cycle, and at the same time in the sealed case. The lowering of the oil adversely affects the reliability of the compression part.

For this reason, in order to suppress oil discharge amount as much as possible, the oil separation member for separating the oil mixed with gas is provided in the path | route which introduces a compressed gas into a discharge pipe.

FIG. 16 is a view showing an oil separator disclosed in Japanese Utility Model Publication No. 85-21511 as a prior art example. In this oil separator, the oil separator disc (2) is used as an oil separator and the oil separator disc (2) is attached to the upper surface of the rotor. The oil separation disk 2 is sandwiched by a spring body 5, such as a corrugated washer, in a single layer small diameter portion 4 of the hollow sleeve 3 attached to the rotor, and has a single layer small diameter portion 4 interposed therebetween. It is fixed by pressing the spring body 5 with elastic force using the fixing ring 7 like C-type snap ring.

However, in the conventional structure for attaching the oil separating member, fine parts such as the hollow sleeve 3, the spring body 5, and the fixing ring 7 are required. In addition, in the actual assembling work, the oil separation disk 2 is fitted into the hollow sleeve 3, and then the fixing ring 7 must be inserted into the circumferential groove 6 using a tool, and the assembly workability is poor.

Accordingly, an object of the present invention is to solve the problems of the prior art and to simplify the attachment structure of the oil separation member, to reduce the number of parts to attach the oil separation member and to provide a rotary compressor excellent in assembly workability.

In order to achieve the above object, the present invention provides a compression section and an electric motor unit for driving the compression section in a hermetic casing, and installs a discharge tube for discharging the compressed gas on the motor section side of the hermetic casing. A rotary compressor having an oil separating member attached to a discharge tube, the oil separating member comprising: a dike portion; A cylindrical portion formed integrally with a central portion of the disc portion and inserted into the rotor inner diameter portion; And an engaging portion installed on an outer circumferential surface of the cylindrical portion and engaged with an engaging monolayer formed at an inner diameter end of the rotor when a force in a direction pulled out from the inner diameter portion of the rotor is applied. And an elastic imparting means for elastically applying a force in a direction in which the oil separation member is pulled out between.

In the above configuration, the engaging portion is configured to form a plurality of projections cut out on the disc side so as to project outward in the radial direction on the outer circumferential surface of the cylindrical portion fitted to the inner diameter portion of the rotor to the oil separating member.

In addition, a ring member having a plurality of pedestal portions having the elasticity inserting means outside the cylindrical portion and having elasticity, or a spring or a corrugated washer fitted to the cylindrical portion may be used.

In the above configuration, it is preferable to provide rotation preventing means for preventing relative rotation of the oil separating member and the ring member.

In addition, the elastic imparting means may be configured to obtain the elastic force to apply a force to the oil separation member by bending the tip of the pedestal portion integrally hanged from the outer peripheral portion of the disc portion of the oil separation member abut the end surface of the rotor.

In the above configuration, the inner diameter portion of the end plate of the rotor end portion has a diameter smaller than the inner diameter of the rotor iron core to form an engaging portion that can be engaged with a plurality of protrusions provided on the cylindrical portion of the oil separating member and separate the oil. The cylindrical part of a member can be comprised so that attachment to the end plate of a rotor edge part at the position of the said tip end part is possible.

The end plate of the rotor end may be configured as a part of the upper laminated plate of the rotor iron core, and the inner diameter portion of the rotor iron core is preferably formed with recessed recesses to escape from the protrusions.

When the cylindrical portion of the oil separation member is inserted into the inner diameter of the rotor until the engagement portion exceeds the engagement fault portion on the rotor side, the engagement portion of the cylindrical portion is engaged with the elastic force of the elasticity applying means, and the engagement state Because it is supported, it can be attached to workability simply by inserting oil separation member.

In addition, since the engagement portion may be integrally provided with the cylindrical portion, and the elastic imparting means may be integrally provided with the oil separation member, or the end plate portion having the engagement single layer portion may be formed by a part of the laminated plate of the rotor core, etc. The number of parts required for fixing can be reduced.

EXAMPLE

Hereinafter, an embodiment of a rotary compressor according to the present invention will be described with reference to the accompanying drawings.

1 is a longitudinal sectional view of a vertical rotary compressor body according to the present embodiment.

Reference numeral 10 denotes a hermetic casing, 11 an electric motor portion, and 12 a compressor portion. The electric motor part 11 is comprised from the stator 13 fixed to the inner peripheral surface of the hermetic casing 10, and the rotor 14 loosely fitted so that the inside of this stator 13 can rotate freely. The crankshaft 15 is joined to the rotor 14, and this crankshaft 15 is supported by the compressor part 12 side so that the main bearing 16 and the sub bearing 17 can rotate freely.

Compressor unit 12 is a two-cylinder type, the first cylinder 18 and the second cylinder 19 are stacked in succession with the partition plate 20 interposed therebetween, and they are integrally sealed by the frame member 21. It is fixed with respect to the casing 10. In addition, the crankshaft 15 is provided with an eccentric first crank part 22 and a second crank part 23, and the inside of the first cylinder 18 is fitted outward from the first crank part 22 and this. The first roller 24 is held, and the second crank part 23 and the second roller 25 are accommodated in the second cylinder 19.

In the compressor part 12, the 1st cylinder 18 and the 2nd cylinder 19 are incorporated so that a blade may slide freely in a radial direction, respectively. In FIG. 1, the blade 28 installed in the 2nd cylinder 19 of these blades is shown. In the first cylinder 18 and the second cylinder 19, the compression chamber volume divided into the rollers 24 and 25 and the blade changes with the eccentric rotation of the rollers 24 and 25, and the suction pipes 40 and 41 are changed. The gas sucked in is compressed.

On the secondary bearing 17 side, the valve cover 30 is fixed to the secondary bearing 17 by bolts 31. Similarly, the valve cover 32 is attached on the main bearing 16 side, and the main bearing 16 is covered with a muffler 33 on the outside of the valve cover 32, and both are fixed using bolts 34. have.

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

The gas compressed in the second cylinder 19 is discharged from the discharge valve 37 and then the sub bearing 17, the second cylinder 19, the partition plate 20, the first cylinder 18, and the main bearing 21. In the gas passage (not shown) which is installed in (), it is discharged to the motor chamber (A) through the muffler (33). In addition, the gas compressed in the first cylinder 18 is discharged from the discharge valve 38 to the motor chamber A on the inner side of the valve cover 32 and the muffler 33 in the same manner. Passed through the gas passage 53 (see FIG. 2) formed in the axial direction of (14) and discharged to the side to which the oil separating disk 50 as the oil separating member is attached and hitting the oil separating disk 50 to mix with the gas. After the oil is separated, it is discharged from the discharge pipe 36 by an external refrigeration cycle.

In Fig. 1, reference numeral 39 denotes a strainer.

Next, the attachment structure of the oil separation disk 50 will be described in detail with reference to the accompanying drawings of FIG. 2.

2 is an exploded view of the assembly of the oil separation disk 50. The rotor 14 forms a rotor iron core by stacking several iron plates 51 having a hole in the center in a disc shape and firmly fitting each other using rivets. As the inner diameter of the rotor iron core, a shaft hole 52 into which the crankshaft 15 is fitted is formed, and a gas passage 53 and each iron plate for introducing a gas concentrically concentric with the shaft hole 52. In order to tighten and engage the 51, the rivet holes 54 for inserting the rivets are axially penetrated into four locations, respectively.

On the other hand, the oil separation disc 50 is made of metal, and the disc portion is formed from the collar portion 57 at the upper end of the bowl-shaped main body portion 56, and can be loosely fitted into the shaft hole 52 of the rotor 14 at the lower side. The cylindrical portion 58 having an outer diameter dimension of a degree is integrally formed on the same axis. On the outer circumferential portion of the cylindrical portion 58, a plurality of protrusions 60 formed by cutting the peripheral wall of the cylindrical portion 58 outward in a partial radial direction from above are provided as engaging portions with the rotor 14, and the protrusions ( When inserted into the rotor 14, the 60 is not fitted, but pulled in the reverse direction to be engaged with the end plate 62 forming the cross section of the rotor 14. As shown in FIG.

The ring member 64, which is used as an elastic imparting means in the direction in which the oil separating disk 50 is engaged, is made of a metal material such as steel, which is rich in elasticity, and in the short cylindrical portion 65 constituting the main body, the angle is 90 ° C. And a pedestal portion 66 opened radially outward is integrally formed. These pedestals 66 are obliquely downward so as to support the short cylindrical portion 65 floating on the surface of the end plate 62. In addition, the inner diameter of the short cylindrical portion 65 has an inner diameter enough to loosely fit the cylindrical portion 58 of the oil separation disk 50.

3 is a view showing a state in which the oil separation disk 50 is attached with the ring member 64 interposed between the upper end surfaces of the rotor 14. The end plate 62 has a circular hole formed on the same axis as the shaft hole 52, and the diameter DE is a diameter smaller than the diameter DR of the shaft hole 52 of the rotor 14. . For this reason, the engaging single-layer part 67 is formed so that the peripheral edge part of the hole part of the end plate 62 may engage and engage the projection part 60.

Thus, as shown in FIG. 3, the ring member 64 is placed on the end plate 62 so as to be centered on the shaft hole 52 of the rotor 14, and the oil separating disk 50 is placed on the ring member 64. When the cylindrical part 56 is pushed in, the protrusion part 60 reaches the position which engages with the tomographic part 67 of the end plate 62. FIG. Since the projection part 60 does not get caught by the engagement tomographic part 67 in this position, the oil separation disk 50 is attached so that it may not fall out from the upper surface side of the rotor 14. In this fixed state, the pedestal portion 66 of the ring member 64 is applied with the protrusion 60 and the fault layer 67 as a result of exerting a force in the direction in which the oil separation disk 50 is fitted upward with its elastic force, respectively. The fit state is more strongly fixed and supported.

Next, the other modification with respect to the ring member 64 is shown to FIG. 4, FIG.

In the ring member 70 shown in FIG. 4, the lower end of the cylindrical part 65 becomes the boss part 71, and the pedestal part 66 extends radially outward from the boss part 71 integrally. have.

By providing such a boss portion 71, there is an advantage that the rigidity of the ring member 64 can be greatly enhanced.

On the other hand, FIG. 5 shows the structure of the ring member 72 to which the structure for the rotation fixing of the oil separation disk 50 was added.

That is, in the ring member 72 of this modification, the recessed portion 73 is formed on the inner circumferential surface of the ring member 72 in the radially outer side. The convex part 74 is formed in the outer peripheral surface of the cylindrical part 58 of the other oil separation disk 50. As shown in FIG.

Therefore, the positional relationship between the oil separation disk 50 and the ring member 72 is determined first by fitting the convex portion 74 on the oil separation disk 50 side to the recess 73 on the ring member 72 side. Therefore, after attaching to the rotor 14, the ring member 72 can prevent rotation. For this reason, the pedestal part 66 of the ring member 72 rises to the rivet of the rotor assembly, and can apply excessive force, or the irrationality that the gas passage 53 is closed in the rotor cross section by the pedestal part 66 can be prevented. .

Next, FIG. 6 is a modification in which the coil spring 80 is applied instead of the ring member 64 shown in FIG. 2 as the elastic imparting means, and FIG. 5 is a variation in which the corrugated washer 82 is used as the elastic imparting means. All of them are constituted by the elastic imparting means as a separate part from the oil separation disk 50.

On the other hand, as shown in FIG. 8, the elasticity applying means can be configured as an integral structure with the oil separation disk 50. As shown in FIG. In this case, the elastic imparting means forms a piece 84 formed by cutting a portion of the side wall of the cylindrical portion 58 of the oil separating disc 50 to the outside, and the cut pieces 84 of the oil separating disc 50 are formed in several places. The tip is bent so as to abut the end plate 62 in the attached state, and the oil separating disk 50 is applied by the elastic force to strongly maintain the engagement between the protrusion 60 and the fault layer 67.

Next, another Example of this invention is described with reference to FIG. In addition, the same components as those of the first embodiment represent the same components and detailed description thereof will be omitted.

In this embodiment, the oil-separating disk itself is provided with elastic means and the oil-separating disk is attached without using a separate ring member or the like.

In FIG. 9, the collar portion 102 of the oil separation disk 100 has a relatively large radius relative to the cylindrical portion 103. In the outer circumference of the collar portion 102, the pedestal portion 104 which lowers the height HD of the collar portion 102 by bringing the tip end into contact with the end plate 62 on the rotor 14 side in the attached state is lowered. Formed. In this embodiment, the position of the pedestal part 104 is provided at a symmetrical position at an angle of 120 ° C with respect to the center, and is configured such that the oil separation plate 100 is attached in a stable posture.

On the other hand, when the collar portion 102 is inserted from the end plate 62 into the shaft hole 52 of the rotor 14, a single-layered portion 106 attached to the hole opening edge of the end plate 62 is provided so as to be successively installed. The cylindrical part 103 is integrally connected in front of this tomographic part 106. As shown in FIG.

In addition, three projections 60 formed at the outer circumference of the cylindrical portion 103 are symmetrically provided at three locations 120 ° C., and the inner diameter of the end plate 62 and the inner diameter of the shaft hole 52 of the rotor 14 are also provided. The engagement tomographic part 67 is formed from the difference, and it is the same as that of 1st Embodiment mentioned above that it has the structure which the said projection part 60 is engaged with this engagement tomographic part 67. FIG.

According to this embodiment, when the oil separation disk 100 is inserted into the shaft hole 52 of the rotor 14, the projection 60 reaches a position where the projection 60 is engaged with the engagement fault layer 67 of the end plate 62, The separating disc is attached so that it does not come off. In addition, even when the pedestal 104 is in contact with the upper surface of the end plate 62, when pressed further inwards, the entire oil separation disk 100 is raised by the elastic force of the pedestal 104 and the collar 102 itself. Since the force is applied in the direction in which the 60 is engaged with the engagement tomographic portion 67, the oil separation disk 100 can be firmly fixed and act like the ring member 64 of the first embodiment.

Next, FIG. 10 is a view showing another modified example. In this modified example, if the inner diameter of the rotor plate 14 and the inner diameter of the rotor 14 are DE and the inner diameter of the rotor 14 is DR, the inner steel plate of the rotor 14 is internally formed. By stacking the iron plates of diameter DO, the large diameter hole of the inner diameter DO is formed, and the protrusion part 60 is easy to be engaged with the engagement tomographic part 67 of the end plate 62. As shown in FIG.

In order to form such a fastening tomographic part 67, as shown in FIG. 11, the iron plate which symmetrically formed two cut-out parts 110 of the same shape below the end plate 62 overlaps several sheets, and is an oil separation disk. It is also possible to form the space portion deviating from the protrusion 60 of the 100 and to form the engagement tomographic portion 67. In this embodiment, since the movement of the protrusion 60 is limited to the inside of the cutout 110, the rotational role of preventing the rotation of the oil separation disk 100 is given. In addition, by cutting a part of the steel sheet, the lamination accuracy is maintained without sacrificing the effect of the pilot pin punched and used for the uppermost positioning of the lamination, compared to the entire machining along the inner circumference. have. As the material of the iron plate provided with the cutout, a material having a hardness higher than that of the other parts of the iron plate is used, and thus the protrusions 60 are brought into contact with each other, whereby wear and the like can be prevented.

In addition, as shown in FIG. 12, the cutouts can be attached in a stable posture with the rotation fixing of the oil separation disk 100 by installing three locations at 120-degree symmetrical positions.

The above is an embodiment in which the end plate 62 is provided on the uppermost layer of the rotor 14, but the inside of the laminated iron plate positioned at the end of the rotor 14 as shown in FIG. 13 (a) (b) without using the end plate 62. The engagement single-layer part 120 may be comprised by setting the diameter DE to the iron plate 112 of the inside diameter slightly smaller than the inside diameter DR and DO of the axial hole 52. As shown in FIG.

The inner diameter of the rotor 14 shown in FIG. 13 (b) is different from that in FIG. 13 (c), and the inner diameter becomes small only at the end.

Next, FIG. 14 shows a modification in which the bushing holes 122 of the rotor all have the same inner diameter and are fitted with the bushing member 122 inserted into the shaft hole 52 under the end plate 62. As shown in FIG. 15, a space portion 124 is formed in the inner diameter portion of the bush member 122 to allow the oil separation disk 100 to rotate and to be fixed at the same time as the projection 60 is removed.

As can be seen from the above-described fact, according to the present invention, the oil separating member disc portion, the cylindrical portion inserted into the inner diameter portion of the rotor, and the hanger formed integrally with the cylindrical portion are formed on the inner diameter portion of the rotor. The cylindrical section of the oil separating member is provided with an engaging portion which can be engaged only in one direction with the fitting single layer and an elastic imparting means for elastically applying the oil separating member in the engaging direction. Since the engagement part is engaged with the engagement fault part just by inserting it into the inner diameter part of the rotor until it exceeds the engagement fault part on the rotor side, the force is applied by the elastic imparting means and the engagement state is supported. It can be attached to workability simply by inserting the separating member.

In addition, since the engaging portion is integrally installed with the cylindrical portion and the elastic imparting means can be integrally provided with the oil separating member, or the end plate portion having the engaging monolayer is composed of a part of the laminated plate of the rotor core, etc. The number of parts required for fixing can be reduced.

Claims (9)

A rotary accommodating a compression part and an electric motor driving the compression part in a hermetic casing, and a discharge pipe for discharging the compressed gas on the motor part side of the hermetic casing, and at the same time, an oil separating member attached to the discharge tube side of the rotor of the motor. In the compressor, the oil separation member is a disk unit; A cylindrical portion formed integrally with a central portion of the disc portion and inserted into the rotor inner diameter portion; And an engaging portion installed on an outer circumferential surface of the cylindrical portion and engaged with an engaging monolayer formed at an inner diameter end of the rotor when a force in a direction pulled out from the inner diameter portion of the rotor is applied. And an elastic imparting means for elastically applying a force in a direction in which the oil separation member is drawn between the rotary compressor and the rotary compressor. 2. The rotor of claim 1, wherein the rotor comprises: a rotor iron core configured by stacking ring-shaped disks; And a fastening tomography portion which engages the fastening portion to the end plate by configuring the inner diameter of the end plate to have a dimension smaller than the inner diameter of the rotor iron core at the same time as the ring-shaped end plate placed on the disc of the outermost layer of the rotor iron core. Rotary compressor characterized in that formed. 2. The rotor according to claim 1, wherein the rotor has a rotor iron core formed by laminating ring-shaped disks, and the rotor core portion on the rotor end side is smaller than the inner diameter of the ring-shaped disk which constitutes a rotor core portion continuous thereto. A rotary compressor comprising a ring-shaped disk having an inner diameter formed by stacking, and a engaging tomographic layer for engaging the engaging portion formed on the rotor core at the end side. The projection part according to any one of claims 1 to 3, wherein the engaging portion has a plurality of projections cut out from the disk portion side so as to project outward in a semi-diameter direction to the outer circumferential surface of the cylindrical portion fitted to the inner diameter portion of the rotor to the oil separating member. Rotary compressor characterized in that formed. 2. The rotary compressor according to claim 1, wherein the elasticity applying means is composed of a ring member having a plurality of pedestals that are elastically sandwiched outside the cylindrical portion. The rotary compressor of claim 1, wherein the elasticity imparting means is formed of a spring or a corrugated washer that fits outside the cylindrical portion. According to claim 1, The oil separation member; And anti-rotation means for preventing relative rotation with the ring member. The method of claim 1, wherein the elasticity imparting means is to bend the end of the pedestal portion integrally hanged from the outer peripheral portion of the disk portion of the oil separation member to the end face of the rotor to bend to obtain an elastic force to apply a force to the oil separation member. Rotary compressor, characterized in that. 5. The rotary compressor of claim 4, wherein a recess is formed in an inner diameter portion of the rotor core to avoid protrusions.