CN212563645U

CN212563645U - Rotary compressor fuel feeding sealing structure

Info

Publication number: CN212563645U
Application number: CN202020819822.3U
Authority: CN
Inventors: 刘云; 韩银丽
Original assignee: Zhejiang Boyang Compressor Co Ltd
Current assignee: Zhejiang Boyang Compressor Co Ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2021-02-19
Anticipated expiration: 2030-05-15

Abstract

The utility model provides a rotary compressor fuel feeding seal structure, at least including the bearing and with bearing fixed connection's amortization cover, be equipped with the bellying on the bearing, be equipped with the dead eye in the bellying, be equipped with the oil inlet on the amortization cover, oil inlet and dead eye intercommunication, lubricating oil flow in the dead eye through the oil inlet. A sealing ring is arranged between the end face of the bulge and the peripheral wall of the oil inlet, and the silencing cover abuts against the sealing ring on the end face of the bulge. An outer folded edge is arranged on the outer circumference of the sealing ring and is attached to the outer wall of the protruding portion. The rotary compressor fuel feeding sealing structure provided by the scheme can isolate the part of circulating lubricating oil from other parts of the rotary compressor, prevent the lubricating oil from seeping into other parts of the rotary compressor, or prevent high-pressure gas generated by the rotary compressor from flowing back into an oil tank for storing the lubricating oil, and ensure that the driving shaft of the rotary compressor can be lubricated normally.

Description

Rotary compressor fuel feeding sealing structure

Technical Field

The utility model relates to a compressor field, concretely relates to rotary compressor fuel feeding seal structure.

Background

Rotary compressors are widely used in the fields of room air conditioners, unit air conditioners, automobile air conditioners, and the like, because of their advantages of better dynamic balance, low cost, and easy manufacturing. With the development of the compressor industry, the requirements for the performance of the compressor in all aspects are higher and higher. Therefore, higher requirements are also put on the oil supply sealing structure of the rotary compressor at the position close to the bottom and the performance brought by the oil supply sealing structure. In the prior art, the oil supply seal structure of rotary compressor bottom position usually uses the mechanical seal of no sealing washer as the main, because metal surface is comparatively crude, use mechanical seal to need great pressure to make the metal sheet of both sides tightly to lean on each other just can realize sealing, this scheme can make bearing core installation deformation big after the installation, and sealing performance is comparatively general, the highly compressed gas of part high temperature can produce and reveal, and enter into the bottom oil tank, make the pressure in the oil tank rise, and then cause the oil absorption effect of core poor, the bad problem of lubrication appears in the complete machine, influence the life of compressor.

Chinese utility model with publication number CN208040701U provides a rotor compressor and accuse oil seal structure thereof, this utility model adopted tray and sealing washer, and the amortization cover supports presses the tray, and the tray supports again to press the sealing washer on the cylinder cap, utilizes the sealing washer to realize sealedly. However, this solution has the following problems: utilize spacing arch to carry on spacingly in this scheme to the sealing washer, this can lead to and then to have a difference in height between sealing washer and the spacing arch, and the tray need be protruding so that can push down the sealing washer with the round of design on the tray, and this geometry that will lead to the tray is comparatively complicated, and production process is comparatively troublesome. However, if the limit bulge is not designed to limit the sealing ring, the problem that the sealing ring falls off is easy to occur, and the sealing effect is also influenced.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: in the oil supply seal structure of current rotary compressor, often can appear sealed effect not good problem, the high-pressure gas of part high temperature can produce and reveal and get into in the bottom oil tank for pressure in the oil tank risees, and then causes the oil absorption effect of core poor, and lubricated bad problem appears in the complete machine, influences the life of compressor. Although the prior art proposes a scheme of sealing by using a sealing ring, the scheme is complex, and the production cost is increased.

In order to solve the technical problem, the utility model provides a technical scheme as follows:

the utility model provides an oil supply sealing structure of a rotary compressor, which at least comprises a bearing and a silencing cover, wherein the bearing is fixedly connected with the silencing cover; the bearing is provided with a convex part, a bearing hole is formed in the convex part, the silencing cover is provided with an oil inlet communicated with the bearing hole, and the oil inlet is connected with an oil inlet device used for introducing lubricating oil into the bearing hole; and a sealing ring surrounding the oil inlet is arranged between the end surface of the boss and the peripheral wall of the oil inlet, an outer folded edge extending along the outer wall of the boss is arranged on one side surface of the sealing ring facing the silencing cover, and the outer folded edge is attached to the outer wall of the boss.

Preferably, the outer wall of the protruding part is provided with an outer step, and the outer folded edge is accommodated on the outer step.

Preferably, an inner folded edge is further arranged on one side surface, facing the silencing cover, of the sealing ring, the extending direction of the inner folded edge is the same as that of the outer folded edge, and a slot is formed between the inner folded edge and the outer folded edge; and the end face of the bulge part is provided with an insertion part matched with the slot.

Furthermore, an inner side step is arranged on the inner wall of the bearing hole close to the inserting part, and the inner folded edge is accommodated on the inner side step.

Preferably, one side of the silencing cover facing the bearing is provided with a silencing cavity, the bearing further comprises a bearing body, the bearing body is provided with at least one exhaust hole and at least one air return hole, and the exhaust hole and the air return hole are communicated with the silencing cavity.

Furthermore, the oil inlet is communicated with the silencing cavity, and the groove bottom surface of the silencing cavity is pressed against the sealing ring on the end surface of the bulge.

Preferably, the oil inlet device comprises an oil suction pipe, and the oil suction pipe is inserted into the oil inlet and is communicated with the bearing hole.

Preferably, an annular bulge is arranged on one side face, facing the bearing, of the silencing cover and surrounds the oil inlet, and the annular bulge abuts against the surface of the sealing ring.

Preferably, an oil guide groove is formed in the bearing hole and extends to the end face of the protruding portion.

Preferably, the bearing is provided with a plurality of bearing screw holes, the silencing cover is provided with silencing cover screw holes matched with the bearing screw holes in position, and the bearing is connected with the silencing cover through bolts.

The advantage of this scheme lies in, because the sealing washer design has outer hem, outer hem can paste on the outer wall of bellying, can provide location and limit function for the sealing washer, makes things convenient for the installation of sealing washer. The outer folded edge is attached to the outer wall of the protruding portion, so that the contact area between the sealing ring and the protruding portion can be increased, and the sealing performance is improved. At the same time, this solution is particularly simple and advantageous for controlling the production costs.

In a preferred embodiment, the silencing cover is further provided with a silencing cavity, the oil inlet is communicated with the silencing cavity, and correspondingly, the sealing ring is also positioned in the silencing cavity. At rotary compressor during operation, the amortization intracavity can be full of high-pressure gas, and the hem outward can be extruded to the pressure that high-pressure gas produced for the hem tightly supports and leans on the outer wall of bellying, further promotes sealing performance, further avoids the sealing washer to drop simultaneously.

In a preferred embodiment, the arrangement of the inner folded edge and the slot can further improve the sealing performance of the sealing ring, and meanwhile, the insertion part can further provide limit for the sealing ring after being inserted into the slot.

Drawings

FIG. 1 is a schematic view illustrating a first embodiment of an oil supply sealing structure of a rotary compressor;

FIG. 2 is a schematic view of a bearing according to a first embodiment;

FIG. 3 is a schematic view of the side of the oil suction cover facing away from the bearing according to the first embodiment;

FIG. 4 is a schematic view of a side of an oil suction cover facing a bearing according to an embodiment;

FIG. 5 is a schematic view illustrating a second embodiment of an oil supply sealing structure of a rotary compressor;

FIG. 6 is a schematic view of the side of the oil suction cover facing the bearing in the second embodiment;

FIG. 7 is a schematic view of a seal ring and a bearing in a third embodiment of an oil supply sealing structure of a rotary compressor;

FIG. 8 is a schematic view of a seal ring and a bearing in a fourth embodiment of an oil supply sealing structure of a rotary compressor;

fig. 9 is a schematic view illustrating the rotary compressor after the oil supply sealing structure is connected to the rotary compressor;

FIG. 10 is a partial view of the portion of FIG. 9A;

description of reference numerals: 1-sealing ring, 11-outer folded edge, 12-inner folded edge, 112-slot, 2-silencing cover, 20-oil suction pipe, 21-silencing cavity, 22-annular bulge, 23-silencing cover screw hole, 24-oil inlet, 3-bearing, 30-air return hole, 31-bulge, 310-bearing body, 311-outer step, 312-inner step, 313-insertion part, 32-bearing hole, 320-oil guide groove, 33-exhaust hole, 34-bearing screw hole, 4-driving shaft, 40-oil supply sealing groove, 5-compression cavity, 6-exhaust pipe and 7-oil tank.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, a fixed connection, an integral connection, or a detachable connection; may be communication within two elements; they may be directly connected or indirectly connected through an intermediate, and those skilled in the art can understand the specific meaning of the above terms in the present invention in specific situations.

As shown in fig. 1, in a first preferred embodiment of the oil supply sealing structure of the rotary compressor, the oil supply sealing structure of the rotary compressor at least comprises a bearing 3, a silencing cover 2 and a sealing ring 1. The bearing 3 includes a bearing body 310 and a boss 31 fixedly disposed on the bearing body 310, and a bearing hole 32 for mounting the driving shaft 4 of the rotary compressor is disposed in the boss 31. The silencing cover 2 is provided with an oil inlet 24, the oil inlet 24 is communicated with the bearing hole 32, and lubricating oil flows into the bearing hole 32 through the oil inlet 24. Sealing washer 1 is located between bellying 31 and amortization cover 2, specifically, and sealing washer 1 is located between the terminal surface of bellying 31 and the periphery wall of oil inlet 24, and sealing washer 1 encircles oil inlet 24. After the silencing cover 2 is fixedly connected with the bearing 3, the silencing cover 2 presses the sealing ring 1 against the end face of the bulge part 31 to achieve a sealing effect. An outer folded edge 11 is arranged on the outer circumference of the sealing ring 1, the outer folded edge 11 extends along the outer wall of the boss 31, and the outer folded edge 11 is attached to the outer wall of the boss 31. The outer folded edge 11 can provide positioning and limiting functions for the sealing ring 1, and meanwhile, the contact area between the sealing ring 1 and the boss 31 is increased, and the sealing performance is improved.

The oil inlet 24 is connected with an oil inlet device for introducing lubricating oil into the bearing hole 32. In a preferred embodiment, the oil intake means comprises an oil suction pipe 20, the oil suction pipe 20 is inserted into the oil inlet 24, and the oil suction pipe 20 is communicated with the bearing hole 32. In actual use, the lubricating oil can flow through the oil suction pipe 20 and finally flow into the bearing hole 32 to provide lubrication to the drive shaft 4, using a difference in air pressure inside the rotary compressor, or using an oil pump.

In the first embodiment, as shown in fig. 2, the bearing 3 is configured such that at least one oil guiding groove 320 is disposed in the bearing hole 32 for guiding the lubricating oil, and the lubricating oil can flow along the oil guiding groove 320 to lubricate the driving shaft 4 inside the rotary compressor. The bearing 3 is also provided with a plurality of bearing screw holes 34, correspondingly, the silencing cover 2 is provided with a plurality of silencing cover screw holes 23, and after bolts are sequentially inserted into the bearing screw holes 34 and the silencing cover screw holes 23, the silencing cover 2 and the bearing 3 can be fixedly connected.

As shown in fig. 3 and 4, the silencing cover 2 of the first embodiment is provided with a silencing cavity 21 on one side of the silencing cover 2 facing the bearing 3, and at least one exhaust hole 33 and at least one air return hole 30 are also provided on the bearing body 310, after the silencing cover 2 is connected with the bearing 3, the exhaust hole 33 and the air return hole 30 are both communicated with the silencing cavity 21, so that the outer walls of the silencing cover 2, the bearing body 310 and the boss 31 jointly enclose a space for gas to flow, and the compressed gas is guided to flow.

In this embodiment, the oil inlet 24 communicates with the silencing cavity 21, the corresponding sealing ring 1 is also located in the silencing cavity 21, and after the silencing cavity 21 is filled with high-pressure gas, the high-pressure gas can provide a pressure to the outer folded edge 11, so that the outer folded edge 11 is more closely attached to the outer wall of the protruding portion 31, and the sealing performance is improved.

The second embodiment of the oil supply sealing structure of the rotary compressor is shown in fig. 5 and fig. 6, and the features of the second embodiment are substantially the same as those of the first embodiment, except that an annular protrusion 22 is arranged in the silencing cavity 21 of the second embodiment, the annular protrusion 22 is arranged around the oil inlet 24, and after the silencing cover 2 is connected with the bearing 3, the annular protrusion 22 can be pressed on the end surface of the sealing ring 1 to provide a greater pressure for the sealing ring 1, and ensure that the sealing ring 1 can be tightly abutted against the end surface of the protrusion 31.

Fig. 7 shows a third embodiment of an oil supply sealing structure of a rotary compressor, the third embodiment has substantially the same features as the previous embodiments, except that in the third embodiment, an outer step 311 is provided on an outer wall of the boss 31, and the outer step 311 can just accommodate the outer flange 11, so as to further increase a contact area between the seal ring 1 and the bearing 3, and improve a sealing effect.

Fig. 8 shows a fourth embodiment of the oil supply sealing structure of the rotary compressor, which has substantially the same features as the above embodiments, except that in the fourth embodiment, an inner folded edge 12 is further provided on the inner circumferential surface of the sealing ring 1, the inner folded edge 12 extends in the same direction as the outer folded edge 11, and an insertion groove 112 is provided between the inner folded edge 12 and the outer folded edge 11. Meanwhile, an inner step 312 is provided on an inner wall of the bearing hole 32, the inner flange 12 can be received on the inner step 312, and an insertion portion 313 adapted to the insertion groove 112 is provided on an end surface of the boss portion 31. After the insertion part 313 is inserted into the insertion slot 112, the positioning and limiting functions can be provided for the installation of the seal ring 1, meanwhile, the contact area between the seal ring 1 and the bearing 3 is increased, and the sealing performance is enhanced.

As shown in fig. 9 and 10, the oil supply sealing structure of the rotary compressor is installed at the rear end of the rotary compressor, and the driving shaft 4 of the rotary compressor is inserted into the bearing hole 32. An oil tank 7 is arranged in the rotary compressor, lubricating oil is stored in the oil tank 7, an oil suction pipe 20 is inserted into the oil tank 7 to suck the lubricating oil, and the lubricating oil flows into the bearing hole 32. The bearing hole 32, the seal ring 1 and the silencing cover 2 enclose an oil supply seal groove 40, and after the lubricating oil flows into the oil supply seal groove 40, the lubricating oil continuously flows to the driving shaft 4, so that continuous lubrication is provided for the driving shaft 4. Moreover, the sealing ring 1 is arranged between the oil supply sealing groove 40 and the silencing cavity 21, so that high-pressure gas in the silencing cavity 21 cannot reversely flow into the oil supply sealing groove 40, and the pressure in the oil tank 7 is kept normal.

The gas sucked by the rotary compressor is compressed in the compression cavity 5, the exhaust hole 33 arranged on the bearing body 310 is communicated with the compression cavity 5, the compressed gas flows into the sound attenuation cavity 21 along the exhaust hole 33 and finally flows back into the rotary compressor from the air return hole 30, and the returned gas is finally discharged from the exhaust pipe 6 after being guided by an air flow pipeline in the compressor, so that the compression work is completed. Due to the sealing ring 1, high-pressure gas in the silencing cavity 21 cannot flow into the oil supply sealing groove 40, and the high-pressure gas can extrude the outer folded edge 11 due to the fact that the pressure in the silencing cavity 21 is large, so that the outer folded edge 11 is tightly attached to the outer wall of the protruding portion 31, and the sealing performance is further improved.

In summary, the above description is only a preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims

1. An oil supply sealing structure of a rotary compressor at least comprises a bearing (3) and a silencing cover (2), wherein the bearing (3) is fixedly connected with the silencing cover (2), and is characterized in that a protruding part (31) is arranged on the bearing (3), a bearing hole (32) is formed in the protruding part (31), an oil inlet (24) communicated with the bearing hole (32) is formed in the silencing cover (2), and the oil inlet (24) is connected with an oil inlet device used for introducing lubricating oil into the bearing hole (32); the sealing ring (1) surrounding the oil inlet (24) is arranged between the end face of the boss (31) and the peripheral wall of the oil inlet (24), an outer folded edge (11) extending along the outer wall of the boss (31) is arranged on one side face, facing the silencing cover (2), of the sealing ring (1), and the outer folded edge (11) is attached to the outer wall of the boss (31).

2. The oil supplying sealing structure of the rotary compressor of claim 1, wherein the boss (31) is provided at an outer wall thereof with an outer step (311), and the outer flange (11) is received at the outer step (311).

3. The oil supply sealing structure of the rotary compressor according to claim 1, wherein an inner folded edge (12) is further provided at a side of the sealing ring (1) facing the noise reduction cover (2), the inner folded edge (12) extends in the same direction as the outer folded edge (11), and a slot (112) is provided between the inner folded edge (12) and the outer folded edge (11); and an insertion part (313) matched with the slot (112) is arranged on the end surface of the bulge part (31).

4. The oil supply sealing structure of the rotary compressor of claim 3, wherein the inner wall of the bearing hole (32) is provided with an inner step (312) at a position adjacent to the insertion portion (313), and the inner flange (12) is received on the inner step (312).

5. The oil supply sealing structure of the rotary compressor according to claim 1, wherein a silencing chamber (21) is provided at a side of the silencing cover (2) facing the bearing (3), the bearing (3) further comprises a bearing body (310), at least one exhaust hole (33) and at least one air return hole (30) are provided on the bearing body (310), and both the exhaust hole (33) and the air return hole (30) are communicated with the silencing chamber (21).

6. The rotary compressor oil supply sealing structure of claim 5, wherein the oil inlet (24) communicates with the muffling chamber (21), and the bottom surface of the muffling chamber (21) presses the sealing ring (1) against the end surface of the boss (31).

7. The rotary compressor oil supply sealing structure of claim 1, wherein the oil feeding means comprises an oil suction pipe (20), the oil suction pipe (20) being inserted into the oil inlet (24) and communicating with the bearing hole (32).

8. Oil supply sealing structure of rotary compressor according to claim 1, characterized in that said silencing cover (2) is provided with an annular protrusion (22) around said oil inlet (24) on the side facing said bearing (3), said annular protrusion (22) abutting against the surface of said sealing ring (1).

9. The oil supply sealing structure of the rotary compressor of claim 1, wherein an oil guide groove (320) is formed in the bearing hole (32), and the oil guide groove (320) extends to an end surface of the boss (31).

10. The oil supply sealing structure of the rotary compressor according to any one of claims 1 to 9, wherein a plurality of bearing screw holes (34) are formed on the bearing (3), a noise reduction cover screw hole (23) adapted to the bearing screw hole (34) is formed on the noise reduction cover (2), and the bearing (3) and the noise reduction cover (2) are connected by a bolt.