Pump body assembly, compressor and refrigeration equipment

Abstract

The utility model provides a pump body assembly, compressor and refrigeration equipment, the pump body assembly is used for the compressor, the compressor comprises a crankshaft, the crankshaft is provided with an oil supply channel, the pump body assembly comprises a shell, the shell is provided with a cavity and a thrust surface, the cavity is used for communicating with the oil supply channel, and the thrust surface is used for contacting with the crankshaft and communicating with the oil supply channel; the pump body is rotatably arranged in the cavity and used for being connected with the crankshaft; the oil return groove is formed in the shell and located on the outer side of the thrust surface in the radial direction of the pump body, the first end of the oil return groove communicates with the thrust surface, and the second end of the oil return groove penetrates through the outer wall of the shell, so that lubricating oil with temperature rise on the thrust surface can flow out through the oil return groove and flow to an oil pool, circulating flowing of oil liquid is achieved, and heat is taken away; the temperature rise of lubricating oil on the thrust surface is reduced, the lubricating effect between the crankshaft and the thrust surface is remarkably improved, abnormal abrasion of the crankshaft and a bearing working surface is avoided, the service life of the compressor is prolonged, and the reliability of the compressor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, and more specifically, to a pump body assembly, a compressor and a refrigeration device. Background Art

[0002] At present, the scroll compressor in the related art includes a gear pump, and the gear pump includes a thrust plate for restricting the up and down movement of the crankshaft to play a thrusting role. During the operation of the scroll compressor, lubricating oil can form an oil film on the thrust surface of the thrust plate to reduce the friction and wear between the crankshaft and the thrust surface. However, when the scroll compressor works for a long time, the oil temperature on the thrust surface rises, resulting in a decline in the lubrication effect between the thrust surface and the crankshaft, and abnormal wear of the working surfaces of the crankshaft and the thrust plate. Summary of the Utility Model

[0003] The embodiments of the utility model aim to solve at least one of the technical problems existing in the prior art.

[0004] To this end, in the first aspect of the embodiments of the utility model, a pump body assembly is provided.

[0005] In the second aspect of the embodiments of the utility model, a compressor is provided.

[0006] In the third aspect of the embodiments of the utility model, a refrigeration device is provided.

[0007] In view of this, according to the first aspect of the embodiments of the utility model, a pump body assembly is provided. The pump body assembly is used for a compressor, and the compressor includes a crankshaft provided with an oil supply channel. The pump body assembly includes: a housing provided with a cavity and a thrust surface, the cavity is used for communicating with the oil supply channel, and the thrust surface is used for contacting the crankshaft and communicating with the oil supply channel; a pump body rotatably arranged in the cavity for connecting the crankshaft; an oil return groove arranged on the housing, along the radial direction of the pump body, the oil return groove is located outside the thrust surface, the first end of the oil return groove is communicated with the thrust surface, and the second end of the oil return groove penetrates through the outer wall of the housing.

[0008] The pump body assembly provided by the embodiments of the utility model includes a housing, a pump body and an oil return groove. Specifically, the housing is provided with a cavity, and the cavity is communicated with the oil supply channel of the crankshaft. Since the pump body is connected to the crankshaft, when the crankshaft rotates, it can drive the pump body to rotate in the cavity, so that the lubricating oil in the oil sump at the bottom of the compressor enters the oil supply channel through the cavity and flows to the thrust surface through the oil supply channel. [[ID=3C]]

[0009] Since the thrust surface contacts the crankshaft to restrict the movement of the crankshaft in the axial direction of the crankshaft, when the lubricating oil flows to the thrust surface, an oil film can be formed on the thrust surface to achieve the lubrication between the crankshaft and the thrust surface.

[0010] It can be understood that when the compressor works for a long time, the oil temperature of the lubricating oil on the thrust surface will rise, the viscosity will increase, which is not conducive to the lubrication between the crankshaft and the thrust surface, resulting in increased wear between the crankshaft and the thrust surface.

[0011] The housing is provided with an oil return groove, and the oil return groove is located radially outside the thrust surface. Specifically, one end of the oil return groove communicates with the thrust surface, and the other end penetrates through the outer wall of the housing. That is to say, when the compressor runs, the crankshaft drives the pump body to rotate in the cavity, so that the lubricating oil in the oil sump flows into the oil supply channel through the cavity, and enters the thrust surface through the oil supply channel to form an oil film. Since the thrust surface communicates with the oil return groove, the lubricating oil with a temperature rise on the thrust surface can flow out through the oil return groove and flow to the oil sump, realizing the circulating flow of the oil fluid, taking away heat, reducing the temperature rise of the lubricating oil on the thrust surface, significantly improving the lubrication effect between the crankshaft and the thrust surface, avoiding abnormal wear of the crankshaft and the bearing working surface, being beneficial to extending the service life of the compressor, and enhancing the reliability of the compressor.

[0012] In addition, since the second end of the oil return groove penetrates through the outer wall of the housing, that is to say, the lubricating oil flowing into the oil return groove from the thrust surface can flow to the bottom oil sump through the second end of the oil return groove.

[0013] Optionally, the pump body includes a gear pump.

[0014] In addition, according to the pump body assembly provided by the above technical solution of the present invention, it also has the following additional technical features:

[0015] In some technical solutions, optionally, the number of the oil return grooves is multiple, and the multiple oil return grooves are arranged at intervals along the circumferential direction of the pump body.

[0016] In this technical solution, it is defined that the number of the oil return grooves is multiple. Specifically, along the circumferential direction of the pump body, the multiple oil return grooves are arranged at intervals. Since each oil return groove communicates with the thrust surface, the lubricating oil with a temperature rise on the thrust surface can flow out through the multiple oil return grooves around and flow to the oil sump, realizing the circulating flow of the oil fluid, quickly taking away heat, further reducing the temperature rise of the lubricating oil on the thrust surface, significantly improving the lubrication effect between the crankshaft and the thrust surface, avoiding abnormal wear of the crankshaft and the bearing working surface, being beneficial to extending the service life of the compressor, and enhancing the reliability of the compressor.

[0017] In some technical solutions, optionally, the thrust surface is provided with an oil inlet groove, and the oil inlet groove is used to communicate with the oil supply channel.

[0018] In this technical solution, it can be understood that for the compressors in the related art, when the compressor runs at a low frequency, due to the low speed, the centrifugal force is small, and the oil supply of the crankshaft is small, resulting in insufficient lubrication between the crankshaft and the thrust surface, causing abnormal wear and failure of the crankshaft and the bearing working surface.

[0019] By providing an oil inlet groove on the thrust surface, when the compressor operates, the crankshaft drives the pump body to rotate within the cavity, enabling the lubricating oil in the oil sump to enter the oil supply passage through the cavity and flow to the oil inlet groove via the oil supply passage, so as to lubricate the crankshaft and the thrust surface. Meanwhile, since the thrust surface is connected to the oil return groove, the lubricating oil with a temperature rise on the thrust surface can flow out through the oil return groove and back to the oil sump, realizing the circulating flow of the oil fluid, taking away heat, reducing the temperature rise of the lubricating oil on the thrust surface, significantly improving the lubrication effect between the crankshaft and the thrust surface, and being able to meet the lubrication requirements even when the compressor operates at low frequency, thus enhancing the reliability of the compressor.

[0020] In addition, by providing an oil inlet groove on the thrust surface, it is beneficial to reduce the contact area between the crankshaft and the thrust surface, further reducing the wear between the crankshaft and the thrust surface.

[0021] In some technical solutions, optionally, at least a part of the oil inlet groove extends radially along the pump body.

[0022] In this technical solution, it is defined that at least part of the oil inlet groove extends radially along the pump body, which is beneficial to increasing the oil film area formed on the thrust surface, improving the lubrication efficiency between the crankshaft and the thrust surface, and alleviating the wear problem between the crankshaft and the thrust surface.

[0023] In some technical solutions, optionally, the number of the oil inlet grooves is multiple, and the multiple oil inlet grooves are arranged at intervals in the circumferential direction of the pump body.

[0024] In this technical solution, it is defined that the number of the oil inlet grooves is multiple. Specifically, in the circumferential direction of the pump body, the multiple oil inlet grooves are arranged at intervals. That is to say, when the compressor operates, the crankshaft drives the pump body to rotate within the cavity, enabling the lubricating oil in the oil sump to enter the oil supply passage through the cavity and flow to the multiple oil inlet grooves via the oil supply passage, so as to lubricate the crankshaft and the thrust surface, which is beneficial to increasing the thickness of the oil film formed on the thrust surface, improving the lubrication effect between the crankshaft and the thrust surface, further reducing the wear between the crankshaft and the thrust surface, and enhancing the reliability of the compressor.

[0025] In addition, by providing multiple oil inlet grooves on the thrust surface, it is beneficial to further reduce the contact area between the crankshaft and the thrust surface, significantly reducing the wear between the crankshaft and the thrust surface.

[0026] In some technical solutions, optionally, the multiple oil inlet grooves include multiple first oil grooves and second oil grooves, the multiple first oil grooves are arranged at intervals in the circumferential direction of the pump body, and the second oil groove communicates with each first oil groove.

[0027] In this technical solution, it is defined that a plurality of oil inlet grooves include a plurality of first oil grooves and a second oil groove. Specifically, along the circumferential direction of the pump body, the plurality of first oil grooves are arranged at intervals, and the second oil groove communicates with each first oil groove. That is to say, by providing the second oil groove, the plurality of first oil grooves are interconnected with each other, which is beneficial to further improving the lubrication efficiency between the crankshaft and the thrust surface, reducing the wear between the crankshaft and the thrust surface, and enhancing the lubrication reliability.

[0028] Optionally, the second oil groove is an annular groove.

[0029] In some technical solutions, optionally, the housing includes a housing body and a thrust plate. Among them, the oil return groove is provided on the housing body, the thrust plate is provided on the housing body and encloses a cavity with the housing body. A thrust surface is provided on the side of the thrust plate facing away from the cavity. Along the axial direction of the pump body, one side surface of the thrust plate located in the cavity can abut against the pump body.

[0030] In this technical solution, it is defined that the housing includes a housing body and a thrust plate. Specifically, the thrust plate is arranged on the housing body. Optionally, an installation groove is further provided on the housing body. Along the axial direction of the pump body, at least a part of the thrust plate is embedded in the installation groove.

[0031] A thrust surface is provided on the side of the thrust plate facing away from the cavity, that is, the upper surface of the thrust plate is the thrust surface. Since the thrust surface is in contact with the crankshaft, axial limitation of the crankshaft is achieved. Along the axial direction of the pump body, one side surface of the thrust plate located in the cavity can abut against the pump body, that is, the lower surface of the thrust plate can abut against the pump body to axially limit the pump body, which is beneficial to enhancing the reliability of the pump body assembly.

[0032] Optionally, the thrust plate is directly riveted and fixed on the housing body. After the housing body and the bearing are locked by screws, the thrust plate is located between the housing body and the crankshaft, and the installation of the thrust plate can be realized, simplifying the installation process of the thrust plate and improving the compactness of the structure of the pump body assembly.

[0033] In some technical solutions, optionally, a first wear-resistant layer is provided on one side surface of the thrust plate located in the cavity.

[0034] In this technical solution, it is defined that a first wear-resistant layer is provided on one side surface of the thrust plate located in the cavity. That is to say, a first wear-resistant layer is provided on the lower surface of the thrust plate.

[0035] It can be understood that since one side surface of the thrust plate located in the cavity can abut against the pump body, that is, the lower surface of the thrust plate is in contact with the pump body. By providing a first wear-resistant layer on the lower surface of the thrust plate, it is beneficial to reducing the wear of the side surface of the thrust plate in contact with the pump body and extending the service life of the thrust plate.

[0036] Optionally, the lower surface of the thrust plate is hardened to form a first wear-resistant layer on the lower surface of the thrust plate.

[0037] In some technical solutions, optionally, the housing further includes a boss provided on the housing body. Radially of the pump body, the boss is located outside the thrust plate and extends axially along the pump body. Wherein, the oil return groove includes a first groove section and a second groove section that are communicated with each other. The first groove section is provided on the boss and communicated with the thrust surface, and the second groove section is provided on the housing body. One end of the second groove section away from the first groove section penetrates through the outer wall of the housing.

[0038] In this technical solution, the housing further includes a boss. Specifically, in the radial direction of the pump body, the boss is located outside the thrust plate, and the boss extends axially along the pump body, so that the thrust plate can be limited in the radial direction, preventing the thrust plate from moving and being unable to effectively limit the crankshaft, which is beneficial to improving the reliability of the compressor operation.

[0039] In addition, it can be understood that the housing is connected to the bearing of the compressor to realize the installation and fixation of the pump body assembly. By providing the boss, it can play a positioning role during the installation process of the pump body assembly, which is beneficial to improving the installation efficiency of the compressor.

[0040] The oil return groove includes a first groove section and a second groove section. Among them, the first groove section is provided on the boss, the second groove section is provided on the housing body, one end of the first groove section is communicated with the thrust surface, the other end is communicated with the second groove section, and one end of the second groove section away from the first groove section penetrates through the outer wall of the housing.

[0041] During the operation of the compressor, the lubricating oil with temperature rise on the thrust surface can flow to the oil sump through the first groove section and the second groove section in sequence, realizing the circulating flow of the oil fluid, taking away heat, reducing the temperature rise of the lubricating oil on the thrust surface, significantly improving the lubrication effect between the crankshaft and the thrust surface, avoiding abnormal wear of the working surfaces of the crankshaft and the bearing, being beneficial to extending the service life of the compressor and improving the reliability of the compressor.

[0042] In some technical solutions, optionally, the compressor further includes a bearing. The bearing is connected to the housing body. The first groove section extends along the side wall of the boss from the connection with the second groove section and penetrates through the end surface of the boss away from the pump body. The first groove section is communicated with the thrust surface through a first gap between the end surface of the boss away from the pump body and the bearing; or the first groove section includes a horizontally extending part and a vertically extending part that are communicated with each other. The vertically extending part extends along the side wall of the boss from the connection with the second groove section and penetrates through the end surface of the boss away from the pump body. The horizontally extending part extends from the connection with the vertically extending part to the inner wall of the boss and is communicated with the thrust surface.

[0043] In this technical solution, it is defined that the compressor also includes a bearing. Specifically, the bearing is connected to the shell body to achieve the installation and fixation of the pump body assembly. The first groove section extends from the connection with the second groove section along the side wall of the boss and passes through the end face of the boss away from the pump body. That is to say, one end of the first groove section is connected to the second groove section, and the other end extends along the side wall of the boss and passes through the end face of the boss away from the pump body. The first groove section is connected to the thrust surface through the first gap between the end face of the boss away from the pump body and the bearing. Specifically, during the operation of the compressor, the lubricating oil with a certain temperature rise on the thrust surface flows through the first gap, the first groove section and the second groove section in sequence to the bottom oil pool, realizing the circulation of the oil, taking away heat, reducing the temperature rise of the lubricating oil on the thrust surface, and significantly improving the lubrication effect between the crankshaft and the thrust surface.

[0044] Alternatively, the first groove section includes a horizontally extending portion and a vertically extending portion, wherein one end of the vertically extending portion is connected to the second groove section, and the other end extends along the side wall of the boss and penetrates the end face of the boss away from the pump body. One end of the horizontally extending portion is connected to the vertically extending portion, and the other end extends to the inner wall of the boss and is connected to the thrust surface. Specifically, during operation of the compressor, lubricating oil with a certain temperature rise on the thrust surface flows sequentially through the horizontally extending portion, the vertically extending portion, and the second groove section to the bottom oil pool, achieving oil circulation, removing heat, reducing the temperature rise of the lubricating oil on the thrust surface, and significantly improving the lubrication effect between the crankshaft and the thrust surface.

[0045] Optionally, the horizontal extension portion is provided on an end surface of the boss away from the pump body.

[0046] In some technical solutions, optionally, the shell includes a shell body, a thrust plate and a cover plate, wherein the oil return groove is provided in the shell body, the thrust plate is provided in the shell body, and is enclosed with the shell body to form a cavity, and a thrust surface is provided on the side of the thrust plate facing away from the cavity, and the cover plate is located between the thrust plate and the pump body along the axial direction of the pump body.

[0047] In this technical solution, the shell is defined as including a shell body, a thrust plate and a cover plate. Specifically, the thrust plate is arranged on the shell body. Optionally, a mounting groove is also provided on the shell body. Along the axial direction of the pump body, at least a part of the thrust plate is embedded in the mounting groove.

[0048] A thrust surface is provided on the side of the thrust plate facing away from the cavity, that is, the upper surface of the thrust plate is the thrust surface. Since the thrust surface contacts the crankshaft, the crankshaft is axially limited.

[0049] Along the axial direction of the pump body, the cover plate is located between the thrust plate and the pump body. By providing the cover plate, the pump body can be limited in the axial direction, which is beneficial to improving the reliability of the pump body assembly.

[0050] In some technical solutions, optionally, along the axial direction of the pump body, there is a spacing between the side surface of the thrust plate facing the cover plate and the side surface of the cover plate facing the thrust plate.

[0051] In this technical solution, along the axial direction of the pump body, there is a spacing between the side surface of the thrust plate facing the cover plate and the side surface of the cover plate facing the thrust plate. That is to say, there is a spacing between the lower surface of the thrust plate and the upper surface of the cover plate, thereby avoiding the problem that the normal rotation of the pump body is affected due to the thrust plate squeezing the cover plate during the rotation of the crankshaft, which is beneficial to further improving the reliability of the pump body assembly, and then ensuring the stable oil supply of the oil supply system during the operation of the compressor.

[0052] Optionally, the housing body is further provided with a limiting groove, and the cover plate is located in the limiting groove.

[0053] In some technical solutions, optionally, the thrust surface is provided with a second wear-resistant layer.

[0054] In this technical solution, it is defined that the thrust surface is provided with a second wear-resistant layer. It can be understood that the thrust surface is in contact with the crankshaft. By providing a second wear-resistant layer on the thrust surface, it is beneficial to reduce the wear of the thrust surface, extend the service life of the thrust plate, and improve the reliability of the compressor.

[0055] Optionally, the second wear-resistant layer includes a PTFE (polytetrafluoroethylene) wear-resistant coating.

[0056] According to the second aspect of the present invention, a compressor is provided, which includes the pump body assembly provided in any of the above technical solutions, and thus has all the beneficial technical effects of the pump body assembly, which will not be elaborated here.

[0057] Furthermore, the compressor further includes a bearing and a crankshaft. Among them, the bearing is connected to the housing, an oil return groove is provided on the side of the housing facing the bearing, the crankshaft is provided in the bearing, the crankshaft is provided with an oil supply channel, the oil supply channel is communicated with the cavity, there is a second gap between the inner wall of the bearing and the outer wall of the crankshaft, the oil supply channel is communicated with the thrust surface through the second gap, and one end of the crankshaft is in contact with the thrust surface.

[0058] The compressor provided by the embodiment of the present invention includes a pump body assembly, a bearing and a crankshaft. Specifically, the housing is connected to the bearing, and optionally, the housing and the bearing are connected by screws to realize the installation and fixation of the pump body assembly.

[0059] A second gap is formed between the inner wall of the bearing and the outer wall of the crankshaft, and the oil supply channel is communicated with the thrust surface through the second gap. That is to say, when the compressor operates, the crankshaft drives the pump body to rotate in the cavity, so that the lubricating oil in the oil sump flows into the oil supply channel through the cavity and enters the thrust surface through the second gap to form an oil film.

[0060] The oil return groove is located on the side of the housing facing the bearing, forming an oil return channel with the lower surface of the bearing. Since the thrust surface is connected to the oil return groove, the lubricating oil on the thrust surface that has heated up can flow out through the oil return groove between the bearing and the housing and into the oil sump, achieving oil circulation, removing heat and reducing the temperature rise of the lubricating oil on the thrust surface. This significantly improves the lubrication between the crankshaft and the thrust surface, preventing abnormal wear on the crankshaft and bearing working surfaces, and helps extend the service life and reliability of the compressor.

[0061] Optionally, the compressor further comprises a filter screen, which is arranged on a side of the housing away from the thrust surface.

[0062] Optionally, the compressor further includes a frame, a shaft sleeve, a spacer and an oil pool baffle.

[0063] Optionally, the compressor includes a fixed scroll, a movable scroll, and a motor. The motor is connected to the crankshaft. The end of the crankshaft away from the thrust surface is connected to the movable scroll. The fixed scroll and the movable scroll cooperate to form a compression chamber. The fixed scroll is provided with an exhaust port, and the exhaust port is connected to the compression chamber. Specifically, when the compressor is running, the motor drives the crankshaft to rotate, and the crankshaft drives the movable scroll to rotate relative to the fixed scroll to compress the gas in the compression chamber. When the exhaust pressure is reached, the compressed high-temperature and high-pressure gas is discharged through the exhaust port. At the same time, the crankshaft also drives the pump body to rotate in the cavity, so that the lubricating oil in the oil pool at the bottom of the compressor enters the oil supply channel through the cavity and enters the thrust surface through the second gap for oil supply and lubrication.

[0064] In addition, the compressor provided by the above technical solution of the utility model also has the following additional technical features:

[0065] In some technical solutions, optionally, the pump body is provided with a connecting hole, which is connected to the cavity, and the compressor also includes a coupling, one end of the coupling is inserted into the oil supply channel and has an interference fit with the channel wall of the oil supply channel, and the other end of the coupling is inserted into the connecting hole and has a clearance fit with the hole wall of the connecting hole; wherein, the coupling is provided with a connecting channel, and the two ends of the connecting channel are respectively connected to the oil supply channel and the connecting hole.

[0066] This technical solution specifies that the compressor also includes a coupling. Specifically, one end of the coupling forms an interference fit with the wall of the oil supply passage, enabling the coupling to rotate when the crankshaft rotates. The other end of the coupling is inserted into the connecting hole, allowing the coupling to rotate the pump body within the cavity. This allows lubricating oil from the oil sump at the bottom of the compressor to enter the oil supply passage through the cavity and enter the thrust surface through the second gap for oil lubrication.

[0067] The coupling is in clearance fit with the hole wall of the connecting hole, so as to avoid deformation at the position where the coupling contacts the pump body after the compressor runs for a long time on the premise of driving the pump body to rotate, which is beneficial to further improving the reliability of the compressor.

[0068] The connecting hole communicates with the cavity. One end of the communication channel communicates with the connecting hole, and the other end communicates with the oil supply channel. When the compressor runs, the crankshaft drives the pump body to rotate in the cavity, so that the lubricating oil in the oil sump at the bottom of the compressor sequentially enters the oil supply channel through the cavity, the connecting hole and the communication channel, and enters the thrust surface through the second gap for oil supply lubrication.

[0069] Optionally, the connecting hole is a D-shaped hole.

[0070] According to the third aspect of the present invention, a refrigeration device is provided, including the pump body assembly or the compressor provided in any of the above technical solutions, and thus has all the beneficial technical effects of the pump body assembly or the compressor, which will not be elaborated here.

[0071] The additional aspects and advantages of the present invention will be given in the following description part, some of which will become obvious from the following description, or will be understood through the practice of the present invention. Description of the Drawings

[0072] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

[0073] Figure 1 One of the structural schematic diagrams of the pump body assembly according to an embodiment of the present invention is shown;

[0074] Figure 2 Another structural schematic diagram of the pump body assembly according to an embodiment of the present invention is shown;

[0075] Figure 3 The exploded view of the pump body assembly according to an embodiment of the present invention is shown;

[0076] Figure 4 Another structural schematic diagram of the pump body assembly according to an embodiment of the present invention is shown;

[0077] Figure 5 One of the partial structural schematic diagrams of the compressor according to an embodiment of the present invention is shown;

[0078] [[ID=NO=40]] Figure 6 One of the structural schematic diagrams of the compressor according to an embodiment of the present invention is shown;

[0079] Figure 7Shows the fourth structural schematic diagram of the pump body assembly according to an embodiment of the present utility model;

[0080] Figure 8 Shows the fifth structural schematic diagram of the pump body assembly according to an embodiment of the present utility model;

[0081] Figure 9 Shows the second partial structural schematic diagram of the compressor according to an embodiment of the present utility model;

[0082] Figure 10 Shows the structural schematic diagram of the thrust plate according to an embodiment of the present utility model;

[0083] Figure 11 Shows the second structural schematic diagram of the compressor according to an embodiment of the present utility model.

[0084] Among them, Figures 1 to 11 The corresponding relationship between the reference numerals and the component names in the figure is as follows:

[0085] 100 pump body assembly, 110 housing, 111 cavity, 112 thrust surface, 113 boss, 114 housing body, 115 thrust plate, 116 cover plate, 120 pump body, 121 connection hole, 130 oil return groove, 131 first groove section, 132 second groove section, 133 horizontal extension part, 134 vertical extension part, 140 oil inlet groove, 141 first oil groove, 142 second oil groove, 150 first wear-resistant layer, 160 second wear-resistant layer, 170 first gap, 200 compressor, 210 bearing, 220 crankshaft, 221 oil supply channel, 230 second gap, 240 coupling, 241 communication channel. Detailed implementation manners

[0086] In order to be able to more clearly understand the above-mentioned objects, features and advantages of the present utility model, the present utility model will be further described in detail below with reference to the drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0087] Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present utility model is not limited by the specific embodiments disclosed below.

[0088] The following refers to Figures 1 to 11 To describe the pump body assembly 100, the compressor 200 and the refrigeration equipment provided according to some embodiments of the present utility model.

[0089] In an embodiment according to the present application, as Figure 1 , Figure 2 AndFigure 7 As shown, a pump body assembly 100 is proposed. The pump body assembly 100 is used for a compressor 200. The compressor 200 includes a crankshaft 220. The crankshaft 220 is provided with an oil supply passage 221. The pump body assembly 100 includes: a housing 110. The housing 110 is provided with a cavity 111 and a thrust surface 112. The cavity 111 is used to communicate with the oil supply passage 221. The thrust surface 112 is used to contact the crankshaft 220 and communicate with the oil supply passage 221; a pump body 120, rotatably arranged in the cavity 111 and used to connect the crankshaft 220; an oil return groove 130, arranged on the housing 110. Along the radial direction of the pump body 120, the oil return groove 130 is located outside the thrust surface 112. The first end of the oil return groove 130 communicates with the thrust surface 112, and the second end of the oil return groove 130 penetrates through the outer wall of the housing 110.

[0090] The pump body assembly 100 provided by the embodiment of the present invention includes a housing 110, a pump body 120 and an oil return groove 130. Specifically, the housing 110 is provided with a cavity 111, and the cavity 111 communicates with the oil supply passage 221 of the crankshaft 220. Since the pump body 120 is connected to the crankshaft 220, when the crankshaft 220 rotates, it can drive the pump body 120 to rotate in the cavity 111, so that the lubricating oil in the oil sump at the bottom of the compressor 200 enters the oil supply passage 221 through the cavity 111 and flows to the thrust surface 112 through the oil supply passage 221.

[0091] Since the thrust surface 112 contacts the crankshaft 220 to limit the movement of the crankshaft 220 in the axial direction of the crankshaft 220, when the lubricating oil flows to the thrust surface 112, an oil film can be formed on the thrust surface 112 to achieve lubrication between the crankshaft 220 and the thrust surface 112.

[0092] It can be understood that when the compressor 200 works for a long time, the oil temperature of the lubricating oil on the thrust surface 112 will increase, and the viscosity will increase, which is not conducive to the lubrication between the crankshaft 220 and the thrust surface 112, resulting in increased wear between the crankshaft 220 and the thrust surface 112.

[0093] The housing 110 is provided with an oil return groove 130, and the oil return groove 130 is located radially outside the thrust surface 112. Specifically, one end of the oil return groove 130 communicates with the thrust surface 112, and the other end penetrates through the outer wall of the housing 110. That is to say, when the compressor 200 operates, the crankshaft 220 drives the pump body 120 to rotate in the cavity 111, so that the lubricating oil in the oil sump flows into the oil supply passage 221 through the cavity 111 and enters the thrust surface 112 through the oil supply passage 221 to form an oil film. Since the thrust surface 112 communicates with the oil return groove 130, the lubricating oil with temperature rise on the thrust surface 112 can flow out through the oil return groove 130 and flow to the oil sump, realizing the circulating flow of the oil fluid, taking away heat, reducing the temperature rise of the lubricating oil on the thrust surface 112, significantly improving the lubrication effect between the crankshaft 220 and the thrust surface 112, avoiding abnormal wear of the working surfaces of the crankshaft 220 and the bearing 210, being beneficial to extending the service life of the compressor 200, and enhancing the reliability of the compressor 200.

[0094] In addition, since the second end of the oil return groove 130 penetrates through the outer wall of the housing 110, that is to say, the lubricating oil flowing into the oil return groove 130 from the thrust surface 112 can flow to the bottom oil sump through the second end of the oil return groove 130.

[0095] Optionally, the pump body 120 includes a gear pump.

[0096] Such as Figure 1 、 Figure 2 and Figure 7 As shown, in some embodiments, optionally, the number of the oil return grooves 130 is multiple, and the multiple oil return grooves 130 are arranged at intervals along the circumferential direction of the pump body 120.

[0097] In this embodiment, the number of the oil return grooves 130 is limited to be multiple. Specifically, along the circumferential direction of the pump body 120, the multiple oil return grooves 130 are arranged at intervals. Since each oil return groove 130 communicates with the thrust surface 112, the lubricating oil with temperature rise on the thrust surface 112 can flow out through the multiple oil return grooves 130 around and flow to the oil sump, realizing the circulating flow of the oil fluid, quickly taking away heat, further reducing the temperature rise of the lubricating oil on the thrust surface 112, significantly improving the lubrication effect between the crankshaft 220 and the thrust surface 112, avoiding abnormal wear of the working surfaces of the crankshaft 220 and the bearing 210, being beneficial to extending the service life of the compressor 200, and enhancing the reliability of the compressor 200.

[0098] Such as Figure 1 、 Figure 2 and Figure 7 As shown, in some embodiments, optionally, the thrust surface 112 is provided with an oil inlet groove 140, and the oil inlet groove 140 is used for communicating with the oil supply passage 221.

[0099] In this embodiment, it can be understood that for the compressor 200 in the related art, when the compressor 200 operates at a low frequency, due to the low rotational speed, the centrifugal force is small, and the oil supply of the crankshaft 220 is small, resulting in insufficient lubrication between the crankshaft 220 and the thrust surface 112, causing abnormal wear and failure of the working surfaces of the crankshaft 220 and the bearing 210.

[0100] By providing an oil inlet groove 140 on the thrust surface 112, when the compressor 200 operates, the crankshaft 220 drives the pump body 120 to rotate in the cavity 111, so that the lubricating oil in the oil sump enters the oil supply passage 221 through the cavity 111 and flows to the oil inlet groove 140 through the oil supply passage 221 to lubricate the crankshaft 220 and the thrust surface 112. At the same time, since the thrust surface 112 is communicated with the oil return groove 130, the lubricating oil with a temperature rise on the thrust surface 112 can flow out through the oil return groove 130 and flow to the oil sump, realizing the circulating flow of the oil fluid, taking away heat, reducing the temperature rise of the lubricating oil on the thrust surface 112, significantly improving the lubrication effect between the crankshaft 220 and the thrust surface 112, and being able to meet the lubrication requirements even when the compressor 200 operates at a low frequency, improving the reliability of the compressor 200.

[0101] In addition, by providing an oil inlet groove 140 on the thrust surface 112, it is beneficial to reduce the contact area between the crankshaft 220 and the thrust surface 112, further reducing the wear between the crankshaft 220 and the thrust surface 112.

[0102] Such as Figure 1 、 Figure 2 and Figure 7 As shown, in some embodiments, optionally, at least a part of the oil inlet groove 140 extends along the radial direction of the pump body 120.

[0103] In this embodiment, it is defined that at least part of the oil inlet groove 140 extends along the radial direction of the pump body 120, which is beneficial to increasing the oil film area formed on the thrust surface 112, improving the lubrication efficiency between the crankshaft 220 and the thrust surface 112, and improving the wear problem between the crankshaft 220 and the thrust surface 112.

[0104] Such as Figure 1 、 Figure 2 and Figure 7 As shown, in some embodiments, optionally, the number of the oil inlet grooves 140 is multiple, and the multiple oil inlet grooves 140 are arranged at intervals along the circumferential direction of the pump body 120.

[0105] In this embodiment, the number of the oil inlet grooves 140 is defined as multiple. Specifically, along the circumferential direction of the pump body 120, the multiple oil inlet grooves 140 are arranged at intervals. That is to say, when the compressor 200 operates, the crankshaft 220 drives the pump body 120 to rotate in the cavity 111, so that the lubricating oil in the oil sump enters the oil supply passage 221 through the cavity 111 and flows to the multiple oil inlet grooves 140 through the oil supply passage 221, so as to lubricate the crankshaft 220 and the thrust surface 112, which is beneficial to increasing the thickness of the oil film formed on the thrust surface 112, improving the lubrication effect between the crankshaft 220 and the thrust surface 112, further reducing the wear between the crankshaft 220 and the thrust surface 112, and enhancing the reliability of the compressor 200.

[0106] In addition, by arranging multiple oil inlet grooves 140 on the thrust surface 112, it is beneficial to further reduce the contact area between the crankshaft 220 and the thrust surface 112, and significantly reduce the wear between the crankshaft 220 and the thrust surface 112.

[0107] As Figure 2 shown, in some embodiments, optionally, the multiple oil inlet grooves 140 include multiple first oil grooves 141 and second oil grooves 142. The multiple first oil grooves 141 are arranged at intervals along the circumferential direction of the pump body 120, and the second oil grooves 142 are communicated with each first oil groove 141.

[0108] In this embodiment, it is defined that the multiple oil inlet grooves 140 include multiple first oil grooves 141 and second oil grooves 142. Specifically, along the circumferential direction of the pump body 120, the multiple first oil grooves 141 are arranged at intervals, and the second oil grooves 142 are communicated with each first oil groove 141. That is to say, by arranging the second oil grooves 142, the multiple first oil grooves 141 are communicated with each other, which is beneficial to further improving the lubrication efficiency between the crankshaft 220 and the thrust surface 112, reducing the wear between the crankshaft 220 and the thrust surface 112, and enhancing the lubrication reliability.

[0109] Optionally, the second oil groove 142 is an annular groove.

[0110] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 shown, in some embodiments, optionally, the housing 110 includes a housing body 114 and a thrust plate 115. The oil return groove 130 is arranged on the housing body 114. The thrust plate 115 is arranged on the housing body 114 and encloses a cavity 111 with the housing body 114. A thrust surface 112 is arranged on a side of the thrust plate 115 facing away from the cavity 111. Along the axial direction of the pump body 120, a side surface of the thrust plate 115 located in the cavity 111 can abut against the pump body 120.

[0111] In this embodiment, it is defined that the housing 110 includes a housing body 114 and a thrust plate 115. Specifically, the thrust plate 115 is disposed on the housing body 114. Optionally, an installation groove is further provided on the housing body 114. Along the axial direction of the pump body 120, at least a part of the thrust plate 115 is embedded in the installation groove.

[0112] A thrust surface 112 is provided on the side of the thrust plate 115 facing away from the cavity 111, that is, the upper surface of the thrust plate 115 is the thrust surface 112. Since the thrust surface 112 is in contact with the crankshaft 220, axial limiting of the crankshaft 220 is thereby performed. Along the axial direction of the pump body 120, one side surface of the thrust plate 115 located in the cavity 111 can abut against the pump body 120, that is, the lower surface of the thrust plate 115 can abut against the pump body 120 to perform axial limiting on the pump body

END

[0113] Optionally, the thrust plate 115 is directly riveted and fixed on the housing body 114. After the housing body 114 and the bearing 210 are locked by screws, the thrust plate 115 is located between the housing body 114 and the crankshaft 220, and thus the installation of the thrust plate 115 can be achieved, simplifying the installation process of the thrust plate 115 and improving the compactness of the structure of the pump body assembly 100.

[0114] As Figure 10 shown, in some embodiments, optionally, a first wear-resistant layer 150 is provided on one side surface of the thrust plate 115 located in the cavity 111.

[0115] In this embodiment, it is defined that a first wear-resistant layer 150 is provided on one side surface of the thrust plate 115 located in the cavity 111, that is, the first wear-resistant layer 150 is provided on the lower surface of the thrust plate 115.

[0116] It can be understood that since one side surface of the thrust plate 115 located in the cavity 111 can abut against the pump body 120, that is, the lower surface of the thrust plate 115 is in contact with the pump body 120. By providing the first wear-resistant layer 150 on the lower surface of the thrust plate 115, it is beneficial to reduce the wear of the side surface of the thrust plate 115 in contact with the pump body 120 and extend the service life of the thrust plate 115.

[0117] Optionally, the lower surface of the thrust plate 115 is hardened to form a first wear-resistant layer 150 on the lower surface of the thrust plate 115.

[0118] As Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown, in some embodiments, optionally, the housing 110 further includes a boss 113 disposed on the housing body 114. Along the radial direction of the pump body 120, the boss 113 is located outside the thrust plate 115 and extends along the axial direction of the pump body 120. Wherein, the oil return groove 130 includes a first groove section 131 and a second groove section 132 that are connected. The first groove section 131 is disposed on the boss 113 and communicates with the thrust surface 112, and the second groove section 132 is disposed on the housing body 114. One end of the second groove section 132 away from the first groove section 131 penetrates through the outer wall of the housing 110.

[0119] In this embodiment, the housing 110 further includes a boss 113. Specifically, along the radial direction of the pump body 120, the boss 113 is located outside the thrust plate 115, and the boss 113 extends along the axial direction of the pump body 120, so as to be able to limit the position of the thrust plate 115 in the radial direction, prevent the thrust plate 115 from moving around and being unable to effectively limit the crankshaft 220, which is beneficial to improving the reliability of the operation of the compressor 200.

[0120] In addition, it can be understood that the housing 110 is connected to the bearing 210 of the compressor 200 to realize the installation and fixation of the pump body assembly 100. By providing the boss 113, it can play a positioning role during the installation process of the pump body assembly 100, which is beneficial to improving the installation efficiency of the compressor 200.

[0121] The oil return groove 130 includes a first groove section 131 and a second groove section 132. Wherein, the first groove section 131 is disposed on the boss 113, the second groove section 132 is disposed on the housing body 114, one end of the first groove section 131 communicates with the thrust surface 112, the other end communicates with the second groove section 132, and one end of the second groove section 132 away from the first groove section 131 penetrates through the outer wall of the housing 110.

[0122] During the operation of the compressor 200, the lubricating oil with temperature rise on the thrust surface 112 can flow to the oil sump through the first groove section 131 and the second groove section 132 in sequence, realizing the circulating flow of the oil fluid, taking away heat, reducing the temperature rise of the lubricating oil on the thrust surface 112, significantly improving the lubrication effect between the crankshaft 220 and the thrust surface 112, avoiding abnormal wear on the working surfaces of the crankshaft 220 and the bearing 210, which is beneficial to extending the service life of the compressor 200 and improving the reliability of the compressor 200.

[0123] Such as Figure 1 、 Figure 2 、 Figure 6 、 Figure 7 and Figure 9As shown, in some embodiments, optionally, the compressor 200 further includes a bearing 210. The bearing 210 is connected to the housing body 114. The first groove section 131 extends along the side wall of the boss 113 from the connection with the second groove section 132 and penetrates through the end face of the boss 113 away from the pump body 120. The first groove section 131 communicates with the thrust surface 112 through a first gap 170 between the end face of the boss 113 away from the pump body 120 and the bearing 210; or the first groove section 131 includes a horizontally extending portion 133 and a vertically extending portion 134 that are connected. The vertically extending portion 134 extends along the side wall of the boss 113 from the connection with the second groove section 132 and penetrates through the end face of the boss 113 away from the pump body 120. The horizontally extending portion 133 extends from the connection with the vertically extending portion 134 to the inner wall of the boss 113 and communicates with the thrust surface 112.

[0124] In this embodiment, it is defined that the compressor 200 further includes a bearing 210. Specifically, the bearing 210 is connected to the housing body 114 to achieve the installation and fixation of the pump body assembly 100. The first groove section 131 extends along the side wall of the boss 113 from the connection with the second groove section 132 and penetrates through the end face of the boss 113 away from the pump body 120. That is to say, one end of the first groove section 131 communicates with the second groove section 132, and the other end extends along the side wall of the boss 113 and penetrates through the end face of the boss 113 away from the pump body 120. The first groove section 131 communicates with the thrust surface 112 through a first gap 170 between the end face of the boss 113 away from the pump body 120 and the bearing 210. Specifically, during the operation of the compressor 200, the lubricating oil with a certain temperature rise on the thrust surface 112 flows through the first gap 170, the first groove section 131, and the second groove section 132 to the bottom oil sump in sequence, realizing the circulating flow of the oil liquid, taking away heat, reducing the temperature rise of the lubricating oil on the thrust surface 112, and significantly improving the lubrication effect between the crankshaft 220 and the thrust surface 112.

[0125] Alternatively, the first groove section 131 includes a horizontally extending portion 133 and a vertically extending portion 134. Among them, one end of the vertically extending portion 134 communicates with the second groove section 132, and the other end extends along the side wall of the boss 113 and penetrates through the end face of the boss 113 away from the pump body 120. One end of the horizontally extending portion 133 communicates with the vertically extending portion 134, and the other end extends to the inner wall of the boss 113 and communicates with the thrust surface 112. Specifically, during the operation of the compressor 200, the lubricating oil with a certain temperature rise on the thrust surface 112 flows through the horizontally extending portion 133, the vertically extending portion 134, and the second groove section 132 to the bottom oil sump in sequence, realizing the circulating flow of the oil liquid, taking away heat, reducing the temperature rise of the lubricating oil on the thrust surface 112, and significantly improving the lubrication effect between the crankshaft 220 and the thrust surface 112.

[0126] Optionally, the horizontally extending portion 133 is disposed on the end face of the boss 113 away from the pump body 120.

[0127] As Figure 7 , Figure 8 and Figure 9 shown, in some embodiments, optionally, the housing 110 includes a housing body 114, a thrust plate 115 and a cover plate 116. Among them, the oil return groove 130 is provided in the housing body 114, the thrust plate 115 is provided on the housing body 114 and encloses a cavity 111 with the housing body 114. A thrust surface 112 is provided on the side of the thrust plate 115 facing away from the cavity 111. Along the axial direction of the pump body 120, the cover plate 116 is located between the thrust plate 115 and the pump body 120.

[0128] In this embodiment, it is defined that the housing 110 includes a housing body 114, a thrust plate 115 and a cover plate 116. Specifically, the thrust plate 115 is disposed on the housing body 114. Optionally, an installation groove is further provided on the housing body 114. Along the axial direction of the pump body 120, at least a part of the thrust plate 115 is embedded in the installation groove.

[0129] A thrust surface 112 is provided on the side of the thrust plate 115 facing away from the cavity 111, that is, the upper surface of the thrust plate 115 is the thrust surface 112. Since the thrust surface 112 is in contact with the crankshaft 220, axial limitation of the crankshaft 220 is achieved.

[0130] Along the axial direction of the pump body 120, the cover plate 116 is located between the thrust plate 115 and the pump body 120. By providing the cover plate 116, axial limitation of the pump body 120 can be achieved, which is beneficial to improving the reliability of the pump body assembly 100.

[0131] Since the thrust surface 112 communicates with the oil return groove 130, the lubricating oil with temperature rise on the thrust surface 112 can flow out through the oil return groove 130 between the bearing 210 and the housing 110 and flow to the oil sump, realizing the circulating flow of the oil fluid, taking away heat, reducing the temperature rise of the lubricating oil on the thrust surface 112, significantly improving the lubrication effect between the crankshaft 220 and the thrust surface 112, avoiding abnormal wear of the working surfaces of the crankshaft 220 and the bearing 210, being beneficial to extending the service life of the compressor 200 and improving the reliability of the compressor 200.

[0132] As Figure 7 , Figure 8 and Figure 9 shown, in some embodiments, optionally, there is a spacing between the side surface of the thrust plate 115 facing the cover plate 116 and the side surface of the cover plate 116 facing the thrust plate 115 along the axial direction of the pump body 120.

[0133] In this embodiment, along the axial direction of the pump body 120, there is a gap between the side surface of the thrust plate 115 facing the cover plate 116 and the side surface of the cover plate 116 facing the thrust plate 115. That is to say, there is a gap between the lower surface of the thrust plate 115 and the upper surface of the cover plate 116, thus avoiding the problem that the normal rotation of the pump body 120 is affected due to the thrust plate 115 squeezing the cover plate 116 during the rotation of the crankshaft 220. This is beneficial to further improve the reliability of the pump body assembly 100, and further ensure the stable oil supply of the oil supply system during the operation of the compressor 200.

[0134] Optionally, the housing body 114 is further provided with a limiting groove, and the cover plate 116 is located in the limiting groove.

[0135] As Figure 10 shown, in some embodiments, optionally, the thrust surface 112 is provided with a second wear-resistant layer 160.

[0136] In this embodiment, it is defined that the thrust surface 112 is provided with the second wear-resistant layer 160. It can be understood that the thrust surface 112 is in contact with the crankshaft 220. By providing the second wear-resistant layer 160 on the thrust surface 112, it is beneficial to reduce the wear of the thrust surface 112, extend the service life of the thrust plate 115, and improve the reliability of the compressor 200.

[0137] Optionally, the second wear-resistant layer 160 includes a PTFE (polytetrafluoroethylene) wear-resistant coating.

[0138] According to the second aspect of the present invention, a compressor 200 is provided, including the pump body assembly 100 provided in any of the above embodiments, and thus has all the beneficial technical effects of the pump body assembly 100, which will not be elaborated here.

[0139] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 11 shown, further, the compressor 200 further includes a bearing 210 and a crankshaft 220. Among them, the bearing 210 is connected to the housing 110, an oil return groove 130 is provided on the side of the housing 110 facing the bearing 210, the crankshaft 220 is provided in the bearing 210, the crankshaft 220 is provided with an oil supply passage 221, the oil supply passage 221 is communicated with the cavity 111, there is a second gap 230 between the inner wall of the bearing 210 and the outer wall of the crankshaft 220, the oil supply passage 221 is communicated with the thrust surface 112 through the second gap 230, and one end of the crankshaft 220 is in contact with the thrust surface 112.

[0140] The compressor 200 provided by the embodiment of the present utility model includes a pump body assembly 100, a bearing 210, and a crankshaft 220. Specifically, the housing 110 is connected to the bearing 210. Optionally, the housing 110 and the bearing 210 are connected by screws to achieve the installation and fixation of the pump body assembly 100.

[0141] A second gap 230 is formed between the inner wall of the bearing 210 and the outer wall of the crankshaft 220. The oil supply channel 221 communicates with the thrust surface 112 through the second gap 230. That is to say, when the compressor 200 operates, the crankshaft 220 drives the pump body 120 to rotate in the cavity 111, so that the lubricating oil in the oil sump flows into the oil supply channel 221 through the cavity 111 and enters the thrust surface 112 through the second gap 230 to form an oil film.

[0142] An oil return groove 130 is provided on the side of the housing 110 facing the bearing 210, so that the oil return groove 130 and the lower surface of the bearing 210 form an oil return channel. Since the thrust surface 112 communicates with the oil return groove 130, the lubricating oil with temperature rise on the thrust surface 112 can flow out through the oil return groove 130 between the bearing 210 and the housing 110 and flow to the oil sump, realizing the circulating flow of the oil fluid, taking away heat, reducing the temperature rise of the lubricating oil on the thrust surface 112, significantly improving the lubrication effect between the crankshaft 220 and the thrust surface 112, avoiding abnormal wear on the working surfaces of the crankshaft 220 and the bearing 210, being beneficial to extending the service life of the compressor 200, and improving the reliability of the compressor 200.

[0143] Optionally, the compressor 200 further includes a filter screen, and the filter screen is arranged on the side of the housing 110 away from the thrust surface 112.

[0144] Optionally, the compressor 200 further includes a frame, a shaft sleeve, a cushion block, and an oil sump baffle.

[0145] Optionally, the compressor 200 includes a stationary scroll, a moving scroll, and a motor. The motor is connected to the crankshaft 220. One end of the crankshaft 220 away from the thrust surface 112 is connected to the moving scroll. The stationary scroll and the moving scroll cooperate to form a compression chamber. The stationary scroll is provided with an exhaust port, and the exhaust port communicates with the compression chamber. Specifically, when the compressor 200 operates, the motor drives the crankshaft 220 to rotate, and the crankshaft 220 drives the moving scroll to perform translational rotation relative to the stationary scroll to compress the gas in the compression chamber. When the exhaust pressure is reached, the compressed high-temperature and high-pressure gas is discharged through the exhaust port. At the same time, the crankshaft 220 also drives the pump body 120 to rotate in the cavity 111, so that the lubricating oil in the oil sump at the bottom of the compressor 200 enters the oil supply channel 221 through the cavity 111 and enters the thrust surface 112 through the second gap 230 for oil supply and lubrication.

[0146] Such as Figure 5 、 Figure 6 、 Figure 9 andFigure 11 As shown, in some embodiments, optionally, the pump body 120 is provided with a connection hole 121, and the connection hole 121 communicates with the cavity 111. The compressor 200 further includes a coupling 240. One end of the coupling 240 is inserted into the oil supply passage 221 and is in interference fit with the wall of the oil supply passage 221. The other end of the coupling 240 is inserted into the connection hole 121 and is in clearance fit with the wall of the connection hole 121. Wherein, the coupling 240 is provided with a communication passage 241, and both ends of the communication passage 241 communicate with the oil supply passage 221 and the connection hole 121 respectively.

[0147] In this embodiment, it is defined that the compressor 200 further includes a coupling 240. Specifically, one end of the coupling 240 is in interference fit with the wall of the oil supply passage 221, so that the crankshaft 220 can drive the coupling 240 to rotate when rotating. The other end of the coupling 240 is inserted into the connection hole 121, so that the coupling 240 can drive the pump body 120 to rotate in the cavity 111, so that the lubricating oil in the oil sump at the bottom of the compressor 200 enters the oil supply passage 221 through the cavity 111, and enters the thrust surface 112 through the second gap 230 for oil supply lubrication.

[0148] The coupling 240 is in clearance fit with the wall of the connection hole 121, so as to avoid deformation at the position where the coupling 240 contacts the pump body 120 after the compressor 200 runs for a long time on the premise of driving the pump body 120 to rotate, which is beneficial to further improve the reliability of the compressor 200.

[0149] The connection hole 121 communicates with the cavity 111. One end of the communication passage 241 communicates with the connection hole 121, and the other end communicates with the oil supply passage 221. When the compressor 200 runs, the crankshaft 220 drives the pump body 120 to rotate in the cavity 111, so that the lubricating oil in the oil sump at the bottom of the compressor 200 sequentially enters the oil supply passage 221 through the cavity 111, the connection hole 121 and the communication passage 241, and enters the thrust surface 112 through the second gap 230 for oil supply lubrication.

[0150] In addition, since the thrust surface 112 communicates with the oil return groove 130, the lubricating oil with temperature rise on the thrust surface 112 can flow out through the oil return groove 130 between the bearing 210 and the housing 110 and flow to the oil sump, realizing the circulating flow of the oil fluid, taking away heat, reducing the temperature rise of the lubricating oil on the thrust surface 112, significantly improving the lubrication effect between the crankshaft 220 and the thrust surface 112, avoiding abnormal wear on the working surfaces of the crankshaft 220 and the bearing 210, being beneficial to extending the service life of the compressor 200, and improving the reliability of the compressor 200.

[0151] Optionally, the connection hole 121 is a D-shaped hole.

[0152] According to the third aspect of the present invention, a refrigeration device is provided, including a pump body assembly 100 or a compressor 200 as provided in any of the above embodiments, thereby having all the beneficial technical effects of the pump body assembly 100 or the compressor 200, which will not be repeated here.

[0153] Optionally, the compressor 200 is a scroll compressor.

[0154] Specifically, the compressor 200 includes a pump body assembly 100 , a bearing 210 and a crankshaft 220 . Specifically, the housing 110 is connected to the bearing 210 . Optionally, the housing 110 and the bearing 210 are connected by screws to achieve installation and fixation of the pump body assembly 100 .

[0155] A second gap 230 is formed between the inner wall of the bearing 210 and the outer wall of the crankshaft 220, and the oil supply channel 221 is connected to the thrust surface 112 through the second gap 230. That is, when the compressor 200 is running, the crankshaft 220 drives the pump body 120 to rotate in the cavity 111, so that the lubricating oil in the oil pool flows into the oil supply channel 221 through the cavity 111, and enters the thrust surface 112 through the second gap 230 to form an oil film.

[0156] The oil return groove 130 is disposed on the side of the housing 110 facing the bearing 210, thereby forming an oil return channel between the oil return groove 130 and the lower surface of the bearing 210. Because the thrust surface 112 is connected to the oil return groove 130, the lubricating oil on the thrust surface 112 with a temperature rise can flow out through the oil return groove 130 between the bearing 210 and the housing 110 and into the oil pool, thereby achieving oil circulation, removing heat, reducing the temperature rise of the lubricating oil on the thrust surface 112, significantly improving the lubrication effect between the crankshaft 220 and the thrust surface 112, and preventing abnormal wear on the working surfaces of the crankshaft 220 and the bearing 210, thereby extending the service life of the compressor 200 and improving the reliability of the compressor 200.

[0157] In this specification, the terms "connect," "install," and "fix" should be understood broadly. For example, "connect" can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0158] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0159] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A pump body assembly, characterized in that, The pump body assembly is used for a compressor, the compressor includes a crankshaft, the crankshaft is provided with an oil supply passage, and the pump body assembly includes: A housing, the housing is provided with a cavity and a thrust surface, the cavity is used to communicate with the oil supply passage, and the thrust surface is used to contact the crankshaft and communicate with the oil supply passage; A pump body rotatably arranged in the cavity for connecting the crankshaft; An oil return groove is arranged on the housing, along the radial direction of the pump body, the oil return groove is located outside the thrust surface, the first end of the oil return groove communicates with the thrust surface, and the second end of the oil return groove penetrates through the outer wall of the housing.

2. The pump body assembly according to claim 1, wherein, The number of the oil return grooves is multiple, and the multiple oil return grooves are arranged at intervals along the circumferential direction of the pump body.

3. The pump body assembly according to claim 1 or 2, characterized in that, The thrust surface is provided with an oil inlet groove for communicating with the oil supply passage.

4. The pump body assembly according to claim 3, characterized in that, At least a part of the oil inlet groove extends along the radial direction of the pump body.

5. The pump body assembly according to claim 3, characterized in that, The number of the oil inlet grooves is multiple, and the multiple oil inlet grooves are arranged at intervals along the circumferential direction of the pump body.

6. The pump body assembly according to claim 5, characterized in that The multiple oil inlet grooves include multiple first oil grooves and second oil grooves, the multiple first oil grooves are arranged at intervals along the circumferential direction of the pump body, and the second oil groove communicates with each first oil groove.

7. The pump body assembly according to claim 1 or 2, characterized in that, The housing includes: A housing body, the oil return groove is arranged on the housing body; A thrust plate arranged on the housing body and enclosing the cavity with the housing body, the side of the thrust plate facing away from the cavity is provided with the thrust surface, and along the axial direction of the pump body, one side of the thrust plate located in the cavity can abut against the pump body.

8. The pump body assembly according to claim 7, characterized in that, One side of the thrust plate located in the cavity is provided with a first wear-resistant layer.

9. The pump body assembly according to claim 7, wherein, The housing further includes: A boss arranged on the housing body, along the radial direction of the pump body, the boss is located outside the thrust plate and extends along the axial direction of the pump body; Wherein, the oil return groove includes a first groove section and a second groove section which are communicated with each other, the first groove section is arranged on the boss and communicates with the thrust surface, the second groove section is arranged on the housing body, and one end of the second groove section far away from the first groove section penetrates through the outer wall of the housing.

10. The pump body assembly according to claim 9, wherein The compressor further includes a bearing, the bearing is connected to the housing body, the first groove section extends along the side wall of the boss from the connection with the second groove section and penetrates through the end surface of the boss far away from the pump body, and the first groove section communicates with the thrust surface through a first gap between the end surface of the boss far away from the pump body and the bearing; or The first groove section includes a horizontally extending part and a vertically extending part which are communicated with each other, the vertically extending part extends along the side wall of the boss from the connection with the second groove section and penetrates through the end surface of the boss far away from the pump body, and the horizontally extending part extends from the connection with the vertically extending part to the inner wall of the boss and communicates with the thrust surface.

11. The pump body assembly according to claim 1 or 2, characterized in that, The housing includes: A housing body, the oil return groove is arranged on the housing body; A thrust plate arranged on the housing body and enclosing the cavity with the housing body, the side of the thrust plate facing away from the cavity is provided with the thrust surface; The cover plate is located between the thrust plate and the pump body along the axial direction of the pump body.

12. The pump body assembly according to claim 11, characterized in that, Along the axial direction of the pump body, there is a spacing between the side surface of the thrust plate facing the cover plate and the side surface of the cover plate facing the thrust plate.

13. The pump body assembly according to claim 1 or 2, characterized in that, The thrust surface is provided with a second wear-resistant layer.

14. A compressor, characterized in that, It includes: The pump body assembly according to any one of claims 1 to 13; The bearing is connected to the housing, and the oil return groove is arranged on the side of the housing facing the bearing; The crankshaft is arranged on the bearing. The crankshaft is provided with an oil supply passage, and the oil supply passage communicates with the cavity. There is a second gap between the inner wall of the bearing and the outer wall of the crankshaft. The oil supply passage communicates with the thrust surface through the second gap, and one end of the crankshaft is in contact with the thrust surface.

15. The compressor according to claim 14, characterized in that, The pump body is provided with a connection hole, and the connection hole communicates with the cavity. The compressor further includes: The coupling, one end of the coupling is inserted into the oil supply passage and is in interference fit with the channel wall of the oil supply passage, and the other end of the coupling is inserted into the connection hole and is in clearance fit with the hole wall of the connection hole; Wherein, the coupling is provided with a communication passage, and both ends of the communication passage communicate with the oil supply passage and the connection hole respectively.

16. A refrigeration device, characterized in that, It includes: The pump body assembly according to any one of claims 1 to 13; Or The compressor according to claim 14 or 15.

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