CN107514365B - Pump body assembly and compressor with same - Google Patents
Pump body assembly and compressor with same Download PDFInfo
- Publication number
- CN107514365B CN107514365B CN201710912355.1A CN201710912355A CN107514365B CN 107514365 B CN107514365 B CN 107514365B CN 201710912355 A CN201710912355 A CN 201710912355A CN 107514365 B CN107514365 B CN 107514365B
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- CN
- China
- Prior art keywords
- pump body
- antifriction
- inner ring
- body assembly
- structural member
- Prior art date
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- 238000005096 rolling process Methods 0.000 claims description 18
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 11
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 11
- -1 polytetrafluoroethylene Polymers 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims description 4
- 230000002787 reinforcement Effects 0.000 claims description 2
- 239000000203 mixture Substances 0.000 description 20
- 239000003507 refrigerant Substances 0.000 description 18
- 239000003921 oil Substances 0.000 description 16
- 238000005299 abrasion Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 235000014676 Phragmites communis Nutrition 0.000 description 8
- 230000002035 prolonged effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 239000010721 machine oil Substances 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000012779 reinforcing material Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/80—Other components
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/16—Wear
Abstract
The invention provides a pump body assembly and a compressor with the same. Wherein, pump body subassembly includes: structural members, two structural members; the bearing type air cylinder is arranged between the two structural members and comprises an outer ring and an inner ring which can rotate relative to the outer ring; and the at least one antifriction structure is arranged on at least one end face of the inner ring, which faces the structural member, so as to reduce friction between the bearing type cylinder and the structural member. The invention effectively solves the problem that the bearing type cylinder of the pump body component is easy to wear and the reliability of the pump body component is reduced in the prior art.
Description
Technical Field
The invention relates to the technical field of compressors, in particular to a pump body assembly and a compressor with the pump body assembly.
Background
The traditional vane compressor air suction and exhaust structure is arranged on the side face of the air cylinder, but the abrasion of the head part of the sliding vane and the inner wall of the air cylinder is serious, so that the mechanical power consumption of the compressor is large, the overall energy efficiency is poor, and even the reliability problems of abnormal abrasion and the like are caused when the abrasion is serious.
In the prior art, in order to solve the above problem, a rolling body and an inner ring (similar to a roller) are added on the inner wall of a cylinder to form a bearing type cylinder, so that sliding motion between the head of a sliding vane and the inner wall of the inner ring is converted into rolling motion between the inner ring and the rolling body, thereby reducing mechanical power consumption of a pump body assembly and improving energy efficiency.
However, during operation of the pump body assembly, the above structure reduces friction power consumption of the slider head, but due to the axial clearance between the inner ring and the flange. Under the action of gas, the inner ring is easy to incline, namely, the center line of the inner ring and the center line of the rotating shaft form an included angle, so that the inner ring and the flange are rubbed and worn, the reliability of a pump body assembly is reduced, and the performance of the compressor is also reduced due to gas leakage caused after the wear.
Disclosure of Invention
The invention mainly aims to provide a pump body assembly and a compressor with the same, so as to solve the problem that in the prior art, a bearing type cylinder of the pump body assembly is easy to wear, and the reliability of the pump body assembly is reduced.
In order to achieve the above object, according to one aspect of the present invention, there is provided a pump body assembly comprising: structural members, two structural members; the bearing type air cylinder is arranged between the two structural members and comprises an outer ring and an inner ring which can rotate relative to the outer ring; and the at least one antifriction structure is arranged on at least one end face of the inner ring, which faces the structural member, so as to reduce friction between the bearing type cylinder and the structural member.
Further, a rolling body accommodating cavity is formed between the inner ring and the outer ring, an axial gap is formed between part or all of the antifriction structure and the inner ring, and high-pressure heat exchange medium in the rolling body accommodating cavity can enter the axial gap, so that the antifriction structure is jacked up and attached to the structural member in preference to the inner ring.
Further, the structural members are an upper flange and a lower flange.
Further, at least one end face of the inner ring, which faces the structural member, is provided with a limiting part, and the surface of the antifriction structure, which is far away from one side of the rolling body accommodating cavity, is in interference fit with the limiting part.
Further, the limiting part is a limiting ring groove, the antifriction structure is an annular structure, the inner diameter of the annular structure is smaller than the inner diameter of the limiting ring groove, the outer diameter of the annular structure is smaller than or equal to the outer diameter of the limiting ring groove, and an axial gap is formed between the end face, far away from the structural part, of part or all of the antifriction structure and the bottom of the limiting ring groove.
Further, the limiting part is a limiting boss, the antifriction structure is an annular structure, the annular structure is sleeved on the limiting boss and is in interference fit with the limiting boss, and an axial gap is reserved between the end face, far away from the structural part, of part or all of the antifriction structure and the end face, facing the structural part, of the inner ring.
Further, the end face, far away from the structural member, of part or all of the antifriction structure is provided with a protruding structure, and the end face, far away from the structural member, of the protruding structure is in contact with the groove bottom of the limit groove.
Further, the end face of part or all of the antifriction structure, which is far away from the structural member, is provided with a protruding structure, and the end face of the protruding structure, which is far away from the structural member, is in contact with the end face of the inner ring, which faces the structural member.
Further, the protruding structure is arranged on one side of the antifriction structure, which is attached to the inner ring.
Further, the pump body assembly further comprises a corrugated or folded elastic piece, wherein the elastic piece is arranged between the limiting part and the antifriction structure and can be in contact with the end face, facing the structural part, of the inner ring.
Further, the elastic piece is a wave reed or a fold line reed.
Further, the antifriction structure is made of a fluororesin.
Further, the antifriction structure is made of polytetrafluoroethylene.
Further, the antifriction structure is made by adding one or more of graphite, molybdenum disulfide, copper powder or fibrous reinforcing materials into polytetrafluoroethylene.
According to another aspect of the present invention, there is provided a compressor comprising the pump body assembly described above.
By applying the technical scheme of the invention, the pump body assembly comprises a structural member, a bearing type cylinder and at least one antifriction structure. Wherein, the structure is two. The bearing type air cylinder is arranged between the two structural members and comprises an outer ring and an inner ring which can rotate relative to the outer ring, and a rolling body accommodating cavity is formed between the inner ring and the outer ring. At least one antifriction structure is disposed on at least one end face of the inner race that faces the structural member to reduce friction between the bearing cylinder and the structural member. In this way, the antifriction structure is arranged on the end face of the inner ring, which faces the structural member, so that contact friction between the inner ring of the bearing type cylinder and the structural member cannot occur.
In the pump body assembly operation process, the inner ring can rotate relative to the outer ring, even if the inner ring inclines relative to the outer ring, the antifriction structure arranged on the inner ring is in direct contact with the structural member, and further the inner ring and the structural member are prevented from being in direct contact friction, and abrasion caused by mutual friction is avoided. Compared with the direct contact friction between the inner ring and the structural part in the prior art, the pump body assembly in the application can prevent the inner ring and the structural part from being worn, prolong the service lives of the structural part and the bearing type cylinder, further improve the working reliability of the pump body assembly and improve the performance of the pump body assembly.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 shows a schematic exploded view of a first embodiment of a pump body assembly according to the present invention;
FIG. 2 shows a cross-sectional view of the pump body assembly of FIG. 1;
FIG. 3 is a cross-sectional view showing the antifriction structure of FIG. 1 disposed on the upper and lower end faces of the inner race;
fig. 4 is a schematic view showing an exploded structure of the antifriction structure in fig. 1 provided only on an upper end face of an inner ring;
FIG. 5 is a cross-sectional view showing the antifriction structure of FIG. 1 disposed only on the upper end face of the inner ring;
FIG. 6 shows an enlarged schematic view of the inner ring of FIG. 5 at A;
FIG. 7 shows a partial cross-sectional view of an inner ring and antifriction structure of a second embodiment of a pump body assembly in accordance with the present invention;
FIG. 8 shows a cross-sectional view of a third embodiment of a pump body assembly according to the present invention with antifriction features provided on the upper and lower end faces of the inner ring;
FIG. 9 shows a cross-sectional view of a third embodiment of a pump body assembly according to the present invention with the antifriction structure provided only on the upper end face of the inner ring;
FIG. 10 shows an enlarged schematic view of the inner ring of FIG. 9 at B;
FIG. 11 shows a partial cross-sectional view of an inner ring and antifriction structure of a fourth embodiment of a pump body assembly in accordance with the present invention;
FIG. 12 shows a front view of a fifth spring of the pump body assembly according to the present invention;
FIG. 13 shows a partial cross-sectional view of an inner ring and antifriction structure of a fifth embodiment of a pump body assembly in accordance with the present invention;
fig. 14 is a schematic view showing an exploded structure of a pump body assembly according to a sixth embodiment of the present invention in which an antifriction structure is provided only on an upper end face of an inner ring;
FIG. 15 illustrates a partial cross-sectional view of the inner race of FIG. 14 assembled with the antifriction structure;
FIG. 16 shows a cross-sectional view of a cylinder of the pump body assembly of FIG. 1; and
fig. 17 shows a sectional view of an embodiment of a compressor according to the present invention.
Wherein the above figures include the following reference numerals:
13. an upper flange; 14. a lower flange; 20. a bearing type cylinder; 21. a rolling element accommodation chamber; 24. an outer ring; 25. an inner ring; 30. a rotating shaft; 31. a long shaft portion; 32. a rotor section; 33. a short shaft portion; 40. a sliding sheet; 50. a knockout component; 60. a housing assembly; 70. a motor assembly; 80. a pump body assembly; 90. an upper cover assembly; 100. a lower cover and a mounting plate; 120. an antifriction structure; 121. a bump structure; 130. an oil pump; 141. a limit ring groove; 142. a limit boss; 150. an axial gap; 160. an elastic member.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.
In the present invention, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used generally with respect to the orientation shown in the drawings or to the vertical, vertical or gravitational orientation; also, for ease of understanding and description, "left, right" is generally directed to the left, right as shown in the drawings; "inner and outer" refer to inner and outer relative to the outline of the components themselves, but the above-described orientation terms are not intended to limit the present invention.
In order to solve the problem that the bearing type cylinder of the pump body assembly is easy to wear and the reliability of the pump body assembly is reduced, the application provides a pump body assembly and a compressor with the pump body assembly.
Example 1
As shown in fig. 1-6, the pump body assembly includes a structural member, a bearing cylinder 20, and at least one antifriction structure 120. Wherein, the structure is two. The bearing cylinder 20 is provided between the two structural members, and the bearing cylinder 20 includes an outer ring 24 and an inner ring 25 rotatable with respect to the outer ring 24. At least one antifriction structure 120 is provided on at least one end face of the inner race 25 that faces the structural member to reduce friction between the bearing cylinder 20 and the structural member.
The antifriction structure 120 is provided on an end face of the inner ring 25 toward the structural member so that contact friction does not occur between the inner ring 25 of the bearing cylinder 20 and the structural member.
During the operation of the pump body assembly, the inner ring 25 can rotate relative to the outer ring 24, even if the inner ring 25 inclines relative to the outer ring 24, the antifriction structure 120 arranged on the inner ring 25 is in direct contact with the structural member, so that the inner ring 25 and the structural member are prevented from being in direct contact friction, and abrasion caused by mutual friction is avoided. Compared with the direct contact friction between the inner ring 25 and the structural member in the prior art, the pump body assembly in the embodiment can prevent the inner ring 25 and the structural member from being worn, prolong the service lives of the structural member and the bearing type cylinder 20, further improve the working reliability of the pump body assembly and improve the performance of the pump body assembly.
In the present embodiment, the bearing cylinder 20 is tightly contacted with the structural member by the antifriction structure 120, so that the refrigerant leakage between the inner ring 25 of the bearing cylinder 20 and the structural member can be avoided. Meanwhile, the above arrangement of the antifriction structure 120 can reduce the machining dimensional accuracy of the inner race 25 in the axial direction, and thus reduce the machining cost of the bearing cylinder 20.
As shown in fig. 1, a rolling element accommodating cavity 21 is formed between the inner ring 25 and the outer ring 24, an axial gap 150 is formed between part or all of the antifriction structure 120 and the inner ring 25, and a high-pressure heat exchange medium in the rolling element accommodating cavity 21 can enter the axial gap 150 so that the antifriction structure 120 is jacked up and attached to a structural member in preference to the inner ring 25. In this way, in the rotation process of the inner ring 25 relative to the outer ring 24, the direct contact between the inner ring 25 and the structural member is converted into the contact friction between the antifriction structure 120 and the structural member, and the antifriction structure 120 has a smaller friction coefficient and better antifriction performance, so that the friction force between the inner ring 25 and the structural member (the upper flange 13 and the lower flange 14) is reduced, the bearing type cylinder 20, the upper flange and the lower flange are prevented from being worn, and the service life of the pump body assembly is prolonged. Meanwhile, the arrangement can prevent leakage of heat exchange medium or lubricating oil caused by abrasion of the bearing type cylinder 20 and the upper and lower flanges, and improve user experience.
Specifically, during operation of the pump body assembly, the rolling element accommodating cavity 21 between the inner ring 25 and the outer ring 24 is always a mixture of high-pressure refrigerator oil and refrigerant, and the high-pressure mixture can enter into the axial gap 150 formed between part or all of the antifriction structure 120 and the inner ring 25, so that the end face of the antifriction structure 120, which is close to the structural member, can be better attached to the structural member under the action of the back pressure in the axial gap 150. Meanwhile, the above arrangement can prevent the inner ring 25 from directly contacting with the structural member or reduce the contact area between the inner ring 25 and the structural member, compared with the prior art in which the inner ring 25 is directly contacted with the structural member, the antifriction structure 120 has a smaller friction coefficient, so that the friction force between the structural member and the antifriction structure 120 is smaller, the abrasion of the structural member and the bearing type cylinder 20 is less, and the service life of the pump body assembly is prolonged.
Optionally, the structural members are an upper flange 13 and a lower flange 14. As shown in fig. 1 and 2, in the present embodiment, the two structural members are the upper flange 13 and the lower flange 14, that is, the bearing cylinder 20 is disposed between the upper flange 13 and the lower flange 14, and the antifriction structure 120 is disposed on the inner ring 25 of the bearing cylinder 20 to prevent contact friction between the inner ring 25 and the upper flange 13 and the lower flange 14, so that direct contact between the inner ring 25 and the upper flange 13 and the lower flange 14 is converted into direct contact between the antifriction structure 120 and the upper flange 13 and the lower flange 14, and due to good antifriction effect of the antifriction structure 120, friction between the inner ring 25 and the upper flange 13 and the lower flange 14 is reduced, and further, service lives of the upper flange 13, the lower flange 14 and the bearing cylinder 20 are prolonged, and operational reliability of the pump body assembly is improved.
As shown in fig. 5, the antifriction structure is provided only between the upper flange 13 and the bearing cylinder 20. The arrangement can prevent contact friction between the upper end of the inner ring 25 and the upper flange 13, further prolong the service lives of the upper flange 13 and the bearing type cylinder 20, improve the working reliability of the pump body assembly and improve the performance of the pump body assembly.
In other embodiments not shown in the drawings, the antifriction structure is provided only between the lower flange and the bearing cylinder. The arrangement can prevent contact friction between the lower end of the inner ring and the lower flange, so that the service lives of the lower flange and the bearing type cylinder are prolonged, the working reliability of the pump body assembly is improved, and the performance of the pump body assembly is improved.
In this embodiment, at least one end surface of the inner ring 25 facing the structural member is provided with a limiting portion, and a surface of the antifriction structure 120 on a side away from the rolling element accommodating chamber 21 is in interference fit with the limiting portion. In this way, the inner ring 25 and the antifriction structure 120 are in interference fit through the limiting portion, so that the mixture of the high-pressure refrigerating machine oil and the refrigerant entering the axial gap 150 is prevented from entering the inner cavity of the cylinder through the axial gap 150 to affect the normal operation of the bearing cylinder 20.
Specifically, the upper end face and the lower end face of the inner ring 25 are both provided with a limiting portion, and the two antifriction structures 120 are in interference fit with the limiting portion, so that the mixture of the high-pressure refrigerator oil and the refrigerant entering the axial gap 150 can provide high-pressure acting force for the antifriction structures 120, and the antifriction structures 120 are attached to the end faces of the upper flange and the lower flange. In this way, the above arrangement reduces the friction between the bearing cylinder 20 and the upper and lower flanges 13, 14, and also prevents the mixture of high-pressure refrigerator oil and refrigerant from entering the inner chamber of the bearing cylinder 20 through the axial gap 150. The structure is simple and easy to assemble.
As shown in fig. 6, the limiting portion is a limiting ring groove 141, the antifriction structure 120 is an annular structure, the inner diameter of the annular structure is smaller than the inner diameter of the limiting ring groove 141, the outer diameter of the annular structure is smaller than or equal to the outer diameter of the limiting ring groove 141, and an axial gap 150 is formed between the end surface of part or all of the antifriction structure 120, which is far away from the structural member, and the bottom of the limiting ring groove 141. In this way, the above arrangement not only can ensure that the surface of the antifriction structure 120 far away from the side of the rolling body accommodating cavity 21 is tightly matched with the limit ring groove 141, but also ensures that the mixture of the high-pressure refrigerator oil and the refrigerant can enter between the end surface of the antifriction structure 120 far away from the structural member and the groove bottom of the limit ring groove 141 to push the antifriction structure 120. The structure is simple and easy to process and realize.
Optionally, the cross-sectional area of the retaining ring groove 141 is greater than or equal to the cross-sectional area of the antifriction structure 120. In this way, the arrangement described above ensures that a mixture of high pressure refrigerator oil and refrigerant is allowed to enter the axial gap 150 to exert a force on the antifriction structure 120.
Optionally, the antifriction structure 120 has a rectangular structure in cross section. The above arrangement makes the structure of the antifriction structure 120 simple and easy to process.
In the present embodiment, the antifriction construction 120 is made of fluororesin. The fluororesin has the characteristics of good antifriction performance, low cost and the like, and the antifriction structure 120 made of the fluororesin can reduce the processing cost of the pump body component.
Generally, the inner ring 25 is made of bearing steel through heat treatment, so that the surface hardness of the inner ring 25 is large and the wear resistance is good. The upper flange 13 and the lower flange 14 are made of cast iron. In this way, the antifriction structures 120 are provided on the upper flange 13 and the lower flange 14 so that direct contact friction of the inner ring 25 with the upper and lower flanges is converted into friction between the inner ring 25 and the antifriction structures 120. Because the antifriction structure 120 has a smaller friction coefficient, the friction between the inner ring 25 and the antifriction structure 120 is reduced, so that the abrasion of the inner ring 25, the upper flange 13 and the lower flange 14 is reduced, and the service life is prolonged.
Optionally, the anti-friction structure 120 is made of Polytetrafluoroethylene (PTFE). Polytetrafluoroethylene (PTFE) has the advantages of high temperature resistance, low friction coefficient, low processing cost, and the like, and the antifriction structure 120 made of Polytetrafluoroethylene (PTFE) has a good antifriction effect, and can reduce the processing cost of the antifriction structure 120.
Optionally, the antifriction structure 120 is made of polytetrafluoroethylene with the addition of one or more of graphite or molybdenum disulfide or copper powder or fibrous reinforcement. Specifically, graphite, molybdenum disulfide, copper powder and fibrous reinforcing materials all have better lubricity, and the friction coefficient of the antifriction structure 120 after adding the substances is further reduced, so that friction loss between the inner ring 25 and the upper flange and the lower flange is reduced, the service life of the pump body assembly is prolonged, vibration and noise generated by friction are reduced, and the use experience of a user is improved.
The material used for the antifriction structure 120 is not limited to this, and may have a good antifriction effect and a small coefficient of friction.
Compared with the prior art without the antifriction structure 120, the axial dimension of the inner ring 25 in this embodiment is smaller, the machining precision requirement is reduced, and even if the inner ring 25 tilts during operation, the outer diameter portion of the inner ring 25 will not contact with the upper and lower flanges, and the axial sealing of the bearing cylinder 20 is mainly achieved by the antifriction structure 120. Meanwhile, the arrangement further ensures that the inner ring 25 cannot interfere with and rub against the upper and lower flanges, so that the processing cost is reduced, and the antifriction effect of the antifriction structure 120 is improved.
As shown in fig. 17, the present application further provides a compressor, including the pump body assembly described above. Optionally, the compressor is a sliding vane compressor. The compressor includes a dispenser member 50, a housing assembly 60, a motor assembly 70, a pump body assembly 80, an upper cover assembly 90, and a lower cover and mounting plate 100. Wherein, the knockout part 50 sets up in the outside of casing subassembly 60, and upper cover subassembly 90 assembly is in the upper end of casing subassembly 60, and lower cover and mounting panel 100 assembly is in the lower extreme of casing subassembly 60, and motor subassembly 70 and pump body subassembly 80 all are located the inside of casing subassembly 60, and motor subassembly 70 sets up in the top of pump body subassembly 80. The pump body assembly 80 of the compressor includes the upper flange 13, the lower flange 14, the bearing cylinder 20, the rotating shaft 30, the antifriction structure 120 and the oil pump 130.
Specifically, the rotary shaft 30 includes a long shaft portion 31, a rotor portion 32, and a short shaft portion 33. Wherein, upper flange 13 is sleeved on major axis portion 31, lower flange 14 is sleeved on minor axis portion 33, and rotor portion 32 is disposed in the inner cavity of bearing cylinder 20. The rotor portion 32 is provided with a slide groove in which the slide 40 is disposed. As shown in fig. 16, in an ideal operation state of the compressor, the center line of the bearing cylinder 20 coincides with the center line of the inner ring 25 in the axial direction. However, in the actual operation of the compressor, the pressures of the chambers divided by the vane 40 are different, and the rolling element accommodation chamber 21 between the inner ring 25 and the outer ring 24 is always a mixture of the high-pressure refrigerator oil and the refrigerant. Meanwhile, the bearing cylinder 20 itself has play, and thus the inner race 25 may be inclined during high-speed rotation. After the inner ring 25 is inclined, the antifriction structure 120 provided on the inner ring 25 is in direct contact with the upper and lower flanges, thereby reducing friction loss between the inner ring 25 and the upper and lower flanges. Since the antifriction structure 120 has a better antifriction effect, the energy loss of the compressor can be reduced and the working performance of the compressor can be improved.
Specifically, as shown in fig. 16, in an ideal operation state of the compressor, the center line of the bearing cylinder 20 in the axial direction coincides with the center line of the inner ring 25. However, in the actual operation of the compressor, the pressure of each chamber divided by the vane 40 is different, and the inner chamber between the inner ring 25 and the outer ring 24 is always a high-pressure refrigerating machine oil and refrigerant composition. Meanwhile, the bearing cylinder 20 itself has play, and thus the inner race 25 may be inclined during high-speed rotation. After the inner ring 25 is inclined, the antifriction structure 120 provided on the inner ring 25 can make contact friction with the upper and lower flanges. Since the antifriction structure 120 has a better antifriction effect, the energy loss of the compressor can be reduced and the working performance of the compressor can be improved.
Alternatively, the bearing cylinder 20 is a ball bearing cylinder or a cylindrical roller bearing cylinder.
Example two
The pump body assembly of the second embodiment differs from that of the first embodiment in that: the antifriction arrangements 120 differ in structure.
As shown in fig. 7, a protrusion structure 121 is provided on an end surface of a part or all of the antifriction structure 120, which is far from the structural member, and the end surface of the protrusion structure 121, which is far from the structural member, is in contact with the groove bottom of the limit groove 141. Like this, in the process that antifriction structure 120 and spacing annular 141 assemble, protruding structure 121 can with spacing annular 141's tank bottom butt, and then assemble antifriction structure 120 in suitable position department, promptly when the pump body subassembly is not starting or under the effect of high-pressure state refrigerator oil and refrigerant's mixture, antifriction structure 120 can with upper and lower flange laminating setting.
Specifically, the end surface of the protrusion structure 121 far away from the structural member contacts with the groove bottom of the limiting ring groove 141, so that an axial gap 150 is formed between the end surface of the antifriction structure 120 far away from the structural member and the groove bottom of the limiting ring groove 141, and the mixture of the high-pressure refrigerator oil and the refrigerant can enter into the axial gap 150 to jack up the antifriction structure 120.
As shown in fig. 7, the protrusion structure 121 is provided on the side of the antifriction structure 120 which is provided in contact with the inner ring 25. On the one hand, the above arrangement makes the mixture of the high-pressure refrigerator oil and the refrigerant act more strongly on the antifriction structure 120 and is directed to the upper flange 13 or the lower flange 14, so that the antifriction structure 120 is more fit with the upper and lower flanges; on the other hand, the above structure arrangement makes the sealing performance between the antifriction structure 120 and the limiting ring groove 141 better, and prevents the mixture of the high-pressure refrigerator oil and the refrigerant from entering the inner cavity to affect the normal operation of the bearing cylinder 20.
Alternatively, the raised structure 121 is a ring-shaped structure. The structure is simple and easy to process.
Note that the arrangement of the bump structure 121 is not limited thereto. Alternatively, the raised structures 121 may be discontinuous arcs, so long as they function as a locator.
Example III
The pump body assembly of the third embodiment differs from that of the first embodiment in that: the limit parts have different structures.
As shown in fig. 8 to 10, the limiting portion is a limiting boss 142, the antifriction structure 120 is an annular structure, the annular structure is sleeved on the limiting boss 142 and is in interference fit with the limiting boss, and an axial gap 150 is formed between an end surface of part or all of the antifriction structure 120, which is far away from the structural member, and an end surface of the inner ring 25, which faces the structural member. In this way, the above arrangement not only can ensure that the surface of the antifriction structure 120 far away from the side of the rolling element accommodating cavity 21 is tightly matched with the limit ring groove 141, but also ensures that the mixture of the high-pressure refrigerator oil and the refrigerant can enter between the end surface of the antifriction structure 120 far away from the structural member and the end surface of the inner ring 25 facing the structural member to push the antifriction structure 120. The structure is simple and easy to process and realize.
Example IV
The pump body assembly of the fourth embodiment differs from that of the third embodiment in that: the antifriction arrangements 120 differ in structure.
As shown in fig. 11, part or all of the antifriction structure 120 has a projection structure 121 on an end face away from the structural member, and the end face of the projection structure 121 away from the structural member is in contact with an end face of the inner race 25 toward the structural member. Like this, in the process that antifriction structure 120 and spacing boss 142 assemble, protruding structure 121 can with the terminal surface butt of the orientation structure of inner circle 25, and then assemble antifriction structure 120 in suitable position department, promptly when the pump body subassembly is not starting or under the effect of high-pressure state refrigerator oil and refrigerant's mixture, antifriction structure 120 can with upper and lower flange laminating setting.
Specifically, the end surface of the protrusion structure 121 far away from the structural member contacts with the end surface of the inner ring 25 facing the structural member, so that an axial gap 150 is formed between the end surface of the antifriction structure 120 far away from the structural member and the end surface of the inner ring 25 facing the structural member, and the mixture of the high-pressure refrigerator oil and the refrigerant can enter into the axial gap 150 to jack up the antifriction structure 120.
Example five
The pump body assembly of the fifth embodiment differs from the first embodiment in that: the pump body components have different composition structures.
In this embodiment, as shown in fig. 12 and 13, the pump body assembly further includes a corrugated elastic member 160, and the corrugated or broken-line-shaped elastic member 160 is disposed between the retainer ring groove 141 and the antifriction structure 120 and is capable of contacting an end face of the inner ring 25 facing the structural member. Specifically, the elastic member 160 is disposed between the groove bottom of the limiting ring groove 141 and the end surface of the antifriction structure 120 far away from the structural member, and the peak and the trough of the corrugated elastic member 160 can be abutted against the groove bottom of the limiting ring groove 141, so that the antifriction structure 120 is assembled at a proper position, that is, when the pump body assembly is not started or under the action of the mixture of high-pressure refrigerating machine oil and refrigerant, the antifriction structure 120 can be attached to the upper flange and the lower flange.
The shape of the elastic member 160 is not limited to this, and the antifriction apparatuses 120 and the groove bottoms of the retainer grooves 141 may abut against each other. Alternatively, the elastic member 160 has a fold line shape. The bending part of the folded-line elastic piece 160 is abutted with the groove bottom of the limit groove 141.
As shown in fig. 12, the corrugated elastic member 160 is a wave reed. The wave reed is a standard component, so that the processing cost of the pump body component is reduced.
Alternatively, the bellows-like elastic member 160 is made of stainless steel material. The stainless steel material has the advantages of wear resistance, antifriction, high hardness and the like, and can prolong the service life of the pump body component.
Alternatively, the elastic member 160 is a fold-line-shaped reed.
Example six
The pump body assembly of the sixth embodiment differs from that of the third embodiment in that: the pump body components have different composition structures.
In this embodiment, as shown in fig. 12, 14 and 15, the pump body assembly further includes a corrugated or folded elastic member 160, where the elastic member 160 is disposed between the limiting boss 142 and the antifriction structure 120 and can contact with an end surface of the inner ring 25 facing the structural member. Specifically, the elastic member 160 is disposed between the end face of the inner ring 25 facing the structural member and the end face of the antifriction structure 120 facing away from the structural member, and the peaks and troughs of the corrugated elastic member 160 can abut against the end face of the inner ring 25 facing the structural member, so that the antifriction structure 120 is assembled at a proper position, that is, when the pump assembly is not started or under the action of the mixture of high-pressure refrigerator oil and refrigerant, the antifriction structure 120 can be attached to the upper flange and the lower flange.
The shape of the elastic member 160 is not limited to this, and the antifriction apparatuses 120 and the groove bottoms of the retainer grooves 141 may abut against each other. Alternatively, the elastic member 160 has a fold line shape. The bending part of the folded-line elastic piece 160 is abutted with the groove bottom of the limit groove 141.
As shown in fig. 12, the elastic member 160 is a wave reed. The wave reed is a standard component, so that the processing cost of the pump body component is reduced.
Alternatively, the elastic member 160 is made of stainless steel material. The stainless steel material has the advantages of wear resistance, antifriction, high hardness and the like, and can prolong the service life of the pump body component.
Alternatively, the elastic member 160 is a fold-line-shaped reed.
From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:
the antifriction structure sets up on the terminal surface of the orientation structure of inner circle for contact friction can not take place between the inner circle of bearing formula cylinder and the structure.
In the pump body assembly operation process, the inner ring can rotate relative to the outer ring, even if the inner ring inclines relative to the outer ring, the antifriction structure arranged on the inner ring is in direct contact with the structural member, and further the inner ring and the structural member are prevented from being in direct contact friction, and abrasion caused by mutual friction is avoided. Compared with the direct contact friction between the inner ring and the structural part in the prior art, the pump body assembly in the application can prevent the inner ring and the structural part from being worn, prolong the service lives of the structural part and the bearing type cylinder, further improve the working reliability of the pump body assembly and improve the performance of the pump body assembly.
It will be apparent that the embodiments described above are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or described herein.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A pump body assembly, comprising:
the number of the structural parts is two;
a bearing cylinder (20) disposed between the two structural members, the bearing cylinder (20) including an outer ring (24) and an inner ring (25) rotatable relative to the outer ring (24);
at least one antifriction structure (120) provided on at least one end face of the inner ring (25) facing the structural member to reduce friction between the bearing cylinder (20) and the structural member;
a rolling body accommodating cavity (21) is formed between the inner ring (25) and the outer ring (24), a limiting part is arranged on at least one end face of the inner ring (25) facing the structural member, and the surface of the antifriction structure (120) away from one side of the rolling body accommodating cavity (21) is in interference fit with the limiting part;
the limiting part is a limiting ring groove (141), the antifriction structure (120) is an annular structure, the inner diameter of the annular structure is smaller than the inner diameter of the limiting ring groove (141), the outer diameter of the annular structure is smaller than or equal to the outer diameter of the limiting ring groove (141), and an axial gap (150) is formed between the end face, far away from the structural part, of the antifriction structure (120) and the groove bottom of the limiting ring groove (141);
and part or all of the antifriction structure (120) is provided with a protruding structure (121) on the end surface far away from the structural member, and the end surface of the protruding structure (121) far away from the structural member is in contact with the groove bottom of the limit groove (141).
2. Pump body assembly according to claim 1, wherein high pressure heat exchange medium in the rolling element receiving cavity (21) is able to enter the axial gap (150) such that the antifriction structure (120) is lifted up and conforms to the structural member in preference to the inner ring (25).
3. Pump body assembly according to claim 1, characterized in that the structural members are an upper flange (13) and a lower flange (14).
4. Pump body assembly according to claim 1, characterized in that the relief structure (121) is provided on the side of the antifriction structure (120) which is provided in abutment with the inner ring (25).
5. Pump body assembly according to claim 1, wherein the antifriction structure (120) is made of a fluororesin.
6. Pump body assembly according to claim 5, wherein the antifriction structure (120) is made of polytetrafluoroethylene.
7. Pump body assembly according to claim 6, wherein the antifriction structure (120) is made of polytetrafluoroethylene with the addition of one or more of graphite or molybdenum disulfide or copper powder or fibrous reinforcement.
8. A compressor comprising a pump body assembly according to any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710912355.1A CN107514365B (en) | 2017-09-29 | 2017-09-29 | Pump body assembly and compressor with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710912355.1A CN107514365B (en) | 2017-09-29 | 2017-09-29 | Pump body assembly and compressor with same |
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| CN107514365A CN107514365A (en) | 2017-12-26 |
| CN107514365B true CN107514365B (en) | 2024-02-27 |
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| CN106438368A (en) * | 2016-11-07 | 2017-02-22 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotary shaft, compressor and air conditioner |
| CN207349088U (en) * | 2017-09-29 | 2018-05-11 | 珠海格力节能环保制冷技术研究中心有限公司 | Pump assembly and there is its compressor |
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| JPS61118586A (en) * | 1985-11-18 | 1986-06-05 | Hitachi Ltd | Rotary type compressor |
| JPH0452588U (en) * | 1990-09-11 | 1992-05-06 | ||
| JPH08170595A (en) * | 1994-12-16 | 1996-07-02 | Matsushita Refrig Co Ltd | Hermetic compressor |
| WO2004040141A1 (en) * | 2002-10-31 | 2004-05-13 | Lg Electronics Inc. | Hermetic compressor having a z-plate |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107514365A (en) | 2017-12-26 |
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