A rolling piston compressor and a vehicle

Abstract

This invention discloses a rolling piston compressor and vehicle, including a housing and a pump assembly installed within the housing; an axial oil hole is provided in the crankshaft of the pump assembly; an oil suction hole is provided on the auxiliary bearing cover, one end of which is connected to the refrigerant oil sump, and the other end of which is connected to the axial oil hole; an oil supply groove is provided on the inner wall of the main bearing bore of the main bearing, and an oil return channel is provided between the oil supply groove and the high-pressure chamber end face of the partition flange; wherein, the oil return inlet of the oil return channel is connected to the end of the oil groove of the oil supply groove, and the oil return outlet of the oil return channel is connected to the high-pressure chamber end face of the partition flange; the oil return outlet of the oil return channel is located between the cylinder assembly and the inner wall of the housing; this invention achieves effective control of the amount of lubricating oil entering the low-pressure chamber, reduces the oil content of the refrigerant gas in the pump assembly, and ensures the circulation supply of lubricating oil, effectively improving the working efficiency and reliability of the compressor.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of compressor, in particular to a rolling piston compressor and a vehicle. BACKGROUND

[0002] The rolling piston compressor is driven by a motor assembly to rotate a crankshaft to drive a rolling piston to rotate in a working cavity of a cylinder to realize the processes of air intake, compression and air discharge; wherein an axial oil hole is arranged at the center of the crankshaft, and lubricating oil flows along the axial oil hole to the main and auxiliary bearing parts to realize the effects of lubrication and heat dissipation.

[0003] At present, the compressor shell is generally divided into a high-pressure cavity and a low-pressure cavity, and a lubricating oil pool is arranged in the high-pressure cavity to reduce the oil discharge amount of the compressor; for example, the Chinese patent application "Compressor and vehicle with the same" (application number: CN201710054923.9); wherein the oil flow path is formed by combining the oil suction channel, the axial oil hole and the plurality of radial oil outlet holes, and since the oil flow path is designed in one direction, the amount of oil entering the low-pressure cavity cannot be controlled, which easily causes the oil content of the refrigerant gas sucked into the pump body assembly to be high, seriously affecting the working performance and reliability of the compressor; secondly, the oil flow path designed in one direction has poor circulation and smoothness of the oil, greatly reducing the lubrication effect and seriously affecting the service life of the compressor. SUMMARY

[0004] In view of the technical problems existing in the prior art, the present application provides a rolling piston compressor and a vehicle to solve the technical problems that the oil flow path designed in one direction in the prior art cannot control the amount of oil entering the low-pressure cavity, easily causes the oil content of the refrigerant gas sucked into the pump body assembly to be high, seriously affects the working performance and reliability of the compressor, and the circulation and smoothness of the oil are poor, greatly reduces the lubrication effect and seriously affects the service life of the compressor.

[0005] To achieve the above-mentioned purposes, the technical scheme adopted by the present application is as follows:

[0006] The present application provides a rolling piston compressor, comprising a shell and a pump body assembly installed in the shell; the pump body assembly comprises a crankshaft, a cylinder assembly, a rolling piston, an auxiliary bearing, an auxiliary bearing cover, a main bearing and a main bearing cover;

[0007] The outer side of the main bearing is sleeved with a partition flange plate, the inner ring of the partition flange plate is fixedly connected with the outer circumferential surface of the main bearing, and the outer ring of the partition flange plate is connected with the shell; the partition flange plate divides the inner cavity of the shell into a low-pressure cavity and a high-pressure cavity; a refrigeration oil pool is arranged in the high-pressure cavity;

[0008] The cylinder assembly is arranged in the high-pressure cavity, a working cavity is arranged in the cylinder assembly, and the rolling piston is arranged in the working cavity; one end of the cylinder assembly is connected with the first end surface of the auxiliary bearing, the auxiliary bearing cover is fixed on the second end surface of the auxiliary bearing; the other end of the cylinder assembly is connected with the first end surface of the main bearing, and the main bearing cover is fixed on the second end surface of the main bearing;

[0009] The crankshaft comprises an axial long shaft part, a main shaft part, an eccentric part and an auxiliary shaft part connected in sequence, the long shaft part extends into the low-pressure cavity; the main bearing sleeve is arranged on the main shaft part, the rolling piston is arranged on the eccentric part in a matched mode, and the auxiliary bearing sleeve is arranged on the auxiliary shaft part; an axial oil hole is arranged in the crankshaft;

[0010] An oil suction hole is arranged on the auxiliary bearing cover, one end of the oil suction hole is connected with the refrigerated oil pool, and the other end of the oil suction hole is connected with the axial oil hole in communication;

[0011] An oil supply groove is arranged on the inner wall of the main bearing hole of the main bearing, and an oil return channel is arranged between the oil supply groove and the flange high-pressure cavity end surface of the separation flange plate; wherein the oil return inlet of the oil return channel is in communication with the oil groove end of the oil supply groove, the oil return outlet of the oil return channel is in communication with the surface of the flange high-pressure cavity end surface of the separation flange plate, and the oil return outlet of the oil return channel is located between the cylinder assembly and the inner wall of the shell.

[0012] Further, the oil return channel comprises a first oil return through hole, a second oil return through hole and a third oil return through hole; the first oil return through hole is arranged in the main bearing, the second oil return through hole is arranged in the main bearing cover, and the third oil return through hole is arranged in the separation flange plate;

[0013] The inlet end of the first oil return through hole is in communication with the oil groove end and serves as the oil return inlet; the outlet end of the first oil return through hole is in communication with the inlet end of the second oil return through hole, the outlet end of the second oil return through hole is in communication with the inlet end of the third oil return through hole; the outlet end of the third oil return through hole is in communication with the surface of the flange high-pressure cavity end surface of the separation flange plate and serves as the oil return outlet.

[0014] Further, the oil return channel comprises a first oil return through hole and an oil return pipe; the first oil return through hole is arranged in the main bearing, and the inlet end of the first oil return through hole is in communication with the oil groove end and serves as the oil return inlet;

[0015] The outlet end of the first oil return through hole is communicated with the first end of the oil return pipe, and the second end of the oil return pipe penetrates the separation flange plate and is communicated with the flange plate high-pressure cavity end surface of the separation flange plate.

[0016] Further, the distance between the oil groove end and the end of the main bearing close to the low-pressure cavity is L; wherein, L≥2mm.

[0017] Further, the shell comprises a low-pressure shell and a high-pressure shell; the low-pressure shell and the high-pressure shell are arranged on the two sides of the separation flange plate respectively; wherein, the low-pressure shell and the first end surface of the separation flange plate jointly form the low-pressure cavity, and the high-pressure shell and the second end surface of the separation flange plate jointly form the high-pressure cavity.

[0018] The low-pressure shell is provided with an air inlet communicated with the low-pressure cavity, and the high-pressure shell is provided with an exhaust port communicated with the high-pressure cavity.

[0019] Further, the end of the high-pressure shell is provided with an oil baffle; the oil baffle is located above the frozen oil pool and is parallel to the oil liquid surface of the frozen oil pool; one end of the oil baffle is fixedly connected with the end of the high-pressure shell, and the other end of the oil baffle extends towards the side of the auxiliary bearing cover.

[0020] Further, the inner wall of the high-pressure shell is provided with a baffle; the baffle is arranged along the radial direction of the high-pressure shell and close to the side of the auxiliary bearing cover; wherein, one end of the baffle is fixedly connected with the inner wall of the high-pressure shell, and the other end of the baffle extends towards the central axis direction of the high-pressure shell.

[0021] Further, the exhaust port is provided with an exhaust elbow; the exhaust elbow is arranged inside the high-pressure shell, the end of the exhaust elbow is communicated with the inner side of the exhaust port; the exhaust start end of the exhaust elbow is arranged in the low-pressure distribution area in the high-pressure cavity; wherein, the low-pressure distribution area in the high-pressure cavity is above the frozen oil pool and close to the end of the high-pressure shell.

[0022] Further, the inner side end of the low-pressure shell is provided with a third bearing; the end of the long shaft part is fixedly arranged in the third bearing.

[0023] The application also provides a vehicle comprising the rolling piston compressor.

[0024] Compared with the prior art, the application has the following beneficial effects:

[0025] The application provides a rolling piston compressor and a vehicle, by setting an oil return channel between an oil supply groove and a flange high-pressure cavity end face of the separation flange, after achieving the lubrication purpose, most of the lubricating oil returns to the high-pressure cavity through the oil return channel, and the remaining small amount of lubricating oil enters the low-pressure cavity, which fully ensures the lubrication effect of the pump body assembly, effectively controls the amount of lubricating oil entering the low-pressure cavity, reduces the oil content of the refrigerant gas sucked into the pump body assembly, and effectively improves the working efficiency and reliability of the compressor; at the same time, the oil return channel and the axial oil hole form a circulating flow path of the lubricating oil, which ensures the circulating supply of the lubricating oil, guarantees the lubrication effect of the parts, and effectively improves the service life of the compressor; the device has simple structure, high reliability, and is convenient to process and manufacture.

[0026] Further, the distance L between the end of the oil groove and the end of the main bearing is greater than or equal to 2mm, by changing the length of the distance L, the oil amount of the lubricating oil flowing to the low-pressure cavity can be controlled, so that the oil content of the refrigerant gas sucked into the pump body assembly from the suction passage is ensured to be within a reasonable range, the volumetric efficiency of the compressor is guaranteed, and the oil discharge rate of the compressor is reduced.

[0027] Further, by setting an oil baffle at the end of the high-pressure shell, the oil surface of the lubricating oil stored at the bottom of the high-pressure cavity is separated from the refrigerant gas in the high-pressure cavity, so as to block the refrigeration oil from being taken away by the flowing high-pressure refrigerant gas.

[0028] Further, baffles are arranged on the inner wall of the high-pressure shell, the flow direction of the refrigerant gas in the high-pressure cavity is changed, the oil and gas are separated, and the oil discharge amount of the compressor is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 A cross-sectional view of the rolling piston compressor described in Embodiment 1;

[0030] Figure 2 A structure schematic view of the pump body assembly in Embodiment 1;

[0031] Figure 3 A partial connection structure schematic view of the main bearing and the main bearing cover in Embodiment 1;

[0032] Figure 4 A cross-sectional view of the main bearing in Embodiment 1;

[0033] Figure 5 A cross-sectional view of the rolling piston compressor described in Embodiment 2.

[0034] Wherein, 1 shell, 2 motor assembly, 3 pump body assembly, 4 third bearing, 5 screw, 6 refrigerated oil pool, 7 drive plate, 8 sealing insert;11 low pressure shell, 111 air inlet, 112 low pressure shell flange, 113 threaded hole, 114 low pressure cavity, 115 low pressure shell inner hole, 116 drive plate cavity, 117 cover plate;12 high pressure shell, 121 exhaust port, 122 high pressure shell flange, 123 fixed through hole, 124 high pressure cavity, 125 oil baffle, 126 baffle, 127 exhaust elbow, 1271 exhaust initial end;21 stator, 22 rotor;30 oil return channel, 301 oil return inlet, 302 oil return outlet, 303 oil return pipe;31 crankshaft, 311 long shaft part, 312 axial oil hole, 313 radial oil hole;32 cylinder assembly;33 rolling piston;34 secondary bearing;35 secondary bearing cover, 350 oil suction hole;36 main bearing;360 main bearing hole, 3601 oil supply groove, 36010 oil groove end, 3602 main bearing end;361 separation flange, 3611 flange high pressure cavity end face;362 flange through hole;363 main bearing cavity;364 main bearing sealing element;37 main bearing cover;38 air suction channel;39 working cavity, 391 air suction inlet. DETAILED DESCRIPTION

[0035] In order to make the technical problems solved by the present application, the technical solutions and beneficial effects more clearly understood, the following specific embodiments, the present application is further described in detail. It should be understood that the specific embodiments described herein are merely intended to explain the present application, and are not intended to limit the present application.

[0036] The present application provides a kind of rolling piston compressor, including shell 1, motor assembly 2 and pump body assembly 3;The motor assembly 2 and the pump body assembly 3 are all installed in the shell 1.

[0037] The shell 1 includes low pressure shell 11 and high pressure shell 12, the low pressure shell 11 is sealed and connected with the high pressure shell 12, forms the cylinder structure with closed inner cavity;Wherein, the inner cavity of the low pressure shell 11 is low pressure cavity 114, the inner cavity of the high pressure shell 12 is high pressure cavity;The low pressure shell 11 is provided with air inlet 111, the air inlet 111 is communicated with the low pressure cavity 114;The high pressure shell 12 is provided with exhaust port 121, the exhaust port 121 is communicated with the high pressure cavity 124;The motor assembly 2 is arranged in the low pressure cavity 114;The working cavity of the pump body assembly 3 is arranged in high pressure cavity 124, the air suction inlet 391 of the working cavity of the pump body assembly 3 is communicated with the low pressure cavity 114 by air suction channel 38.

[0038] The motor assembly 2 comprises a stator 21 and a rotor 22, the stator 21 is assembled in the low-pressure shell 11, the rotor 22 is installed in the stator 21, and the rotor 22 is press-fitted on the crankshaft of the pump body assembly 3.

[0039] The pump body assembly 3 comprises a crankshaft 31, a cylinder assembly 32, a rolling piston 33, a secondary bearing 34, a secondary bearing cover 35, a main bearing 36 and a main bearing cover 37; the outer side of the main bearing 36 is sleeved with a partition flange plate 361, the inner ring of the partition flange plate 361 is fixedly connected with the outer circumferential surface of the main bearing 36; the outer ring of the partition flange plate 361 is connected with the shell 1 and is arranged between the open end of the low-pressure shell 11 and the open end of the high-pressure shell 12; the partition flange plate 361 divides the closed inner ring of the shell 1 into the low-pressure cavity 114 and the high-pressure cavity 124.

[0040] Specifically, the low-pressure shell 11 and the high-pressure shell 12 are arranged on the two sides of the partition flange plate 361 respectively, and the low-pressure shell 11, the partition flange plate 361 and the high-pressure shell 12 are fixedly connected in sequence through screws 5; the outer side of the open end of the low-pressure shell 11 is provided with a low-pressure shell flange plate 112, a plurality of threaded holes 113 are uniformly arranged on the low-pressure shell flange plate 112 in the circumferential direction; a plurality of flange plate through holes 362 are uniformly arranged on the partition flange plate 361 in the circumferential direction; the outer side of the open end of the high-pressure shell 12 is provided with a high-pressure shell flange plate 122, a plurality of fixed through holes 123 are uniformly arranged on the high-pressure shell flange plate 122 in the circumferential direction; the threaded holes 113, the flange plate through holes 362 and the fixed through holes 123 are arranged one by one in correspondence; the screws 5 pass through the fixed through holes 123 and the flange plate through holes 362 in sequence and are fastened and connected together with the threaded holes 113; the low-pressure shell 11 and the first end face of the partition flange plate 361 form the low-pressure cavity 114, and the high-pressure shell 12 and the second end face of the partition flange plate 361 form the high-pressure cavity 124; wherein, the high-pressure cavity 124 is provided with a refrigerated oil pool 6.

[0041] The crankshaft 31 includes a long shaft portion 311, a main shaft portion, an eccentric portion, and a secondary shaft portion connected axially in sequence. The long shaft portion 311 extends into the low-pressure chamber 114. The rotor 22 is sleeved on the long shaft portion 311, the main bearing 36 is sleeved on the main shaft portion, the rolling piston 33 is fitted on the eccentric portion, and the secondary bearing 34 is sleeved on the secondary shaft portion. The cylinder assembly 32 is disposed in the high-pressure chamber 124, and a working chamber is provided inside the cylinder assembly 32. The rolling piston 33 is disposed in the working chamber. One end of the cylinder assembly 32 is connected to the first end face of the secondary bearing 34, and the secondary bearing cover 35 is fixed to the second end face of the secondary bearing 34. The other end of the cylinder assembly 32 is connected to the first end face of the main bearing 36, and the main bearing cover 37 is fixed to the second end face of the main bearing 36. A third bearing 4 is provided at the inner end of the low-pressure housing 11, and the end of the long shaft portion 311 is fixedly inserted into the third bearing 4.

[0042] An axial oil hole 312 is provided inside the crankshaft 31, and a plurality of radial oil holes 313 are provided on the crankshaft 31 along its axial direction; wherein, one end of the radial oil hole 313 communicates with the axial oil hole 312, and the other end of the radial oil hole 313 communicates with the part to be lubricated; wherein, the part to be lubricated includes the space between the crankshaft 31 and the rolling piston 33, the space between the crankshaft 31 and the auxiliary bearing 34, and the space between the crankshaft 31 and the main bearing 36.

[0043] The auxiliary bearing cover 35 is provided with an oil suction hole 350, one end of which is connected to the refrigeration oil tank 6, and the other end of which is connected to the axial oil hole 312. An oil supply groove 3601 is provided on the inner wall of the main bearing hole 360 ​​of the main bearing 36. The beginning of the oil supply groove 3601 is connected to the axial oil hole 312 through a radial oil hole. The oil supply groove 3601 is connected to the partition flange 361. An oil return channel 30 is provided between the high-pressure chamber end faces 3611 of the flange; wherein, the oil return inlet 301 of the oil return channel 30 is connected to the oil tank end 36010 of the oil supply tank 3601, and the oil return outlet 302 of the oil return channel 30 is connected to the surface of the high-pressure chamber end face 3611 of the partition flange 361; wherein, the oil return outlet 302 of the oil return channel 30 is located between the cylinder assembly 32 and the inner wall of the high-pressure housing 12.

[0044] The oil return channel 30 comprises a first oil return through hole, a second oil return through hole and a third oil return through hole; the first oil return through hole is arranged in the main bearing 36, the second oil return through hole is arranged in the main bearing cover 37, and the third oil return through hole is arranged in the separation flange plate 361; wherein the inlet end of the first oil return through hole is communicated with the oil groove end 36010 and serves as the oil return inlet 301; the outlet end of the first oil return through hole is communicated with the inlet end of the second oil return through hole, the outlet end of the second oil return through hole is communicated with the inlet end of the third oil return through hole; the outlet end of the third oil return through hole penetrates the surface of the flange plate high-pressure cavity end surface 3611 of the separation flange plate 361 and serves as the oil return outlet 302.

[0045] In the present application, another implementation method of the oil return channel 30 is also provided, which is specifically as follows:

[0046] The oil return channel 30 comprises a first oil return through hole and an oil return pipe 303; the first oil return through hole is arranged in the main bearing 36, and the oil return pipe 303 is located in the low-pressure cavity 114; the inlet end of the first oil return through hole is communicated with the oil groove end 36010 and serves as the oil return inlet 301; the outlet end of the first oil return through hole is communicated with the first end of the oil return pipe 303, the second end of the oil return pipe 303 penetrates the separation flange plate 361 and penetrates the surface of the flange plate high-pressure cavity end surface 3611 of the separation flange plate 361; wherein the second end of the oil return pipe 303 serves as the oil return outlet 302, and the oil return pipe 303 is located in the low-pressure cavity 114.

[0047] The distance between the oil groove end 36010 and the end of the main bearing 36 close to the low-pressure cavity 114 is L; wherein L≥2mm; by changing the length of the distance L, the oil amount of the lubricating oil flowing to the low-pressure cavity can be controlled, so as to ensure that the oil content of the refrigerant gas sucked from the suction passage of the pump body assembly is within a reasonable range, the volumetric efficiency of the compressor is ensured, and the oil discharge rate of the compressor is reduced.

[0048] The end of the high-pressure shell 12 is provided with an oil baffle 125; the oil baffle 125 is located above the refrigeration oil pool 6 and is parallel to the oil surface of the refrigeration oil pool 6; one end of the oil baffle 125 is fixedly connected with the end of the high-pressure shell 12, and the other end of the oil baffle 125 extends to the side of the auxiliary bearing cover 36; by arranging the oil baffle at the end of the high-pressure shell, the oil surface of the lubricating oil stored at the bottom of the high-pressure cavity is separated from the refrigerant gas in the high-pressure cavity, so as to block the refrigeration oil from being taken away by the flowing high-pressure refrigerant gas.

[0049] The inner wall of the high-pressure shell 12 is provided with a baffle 127; the baffle 127 is arranged along the radial direction of the high-pressure shell 12 and is arranged close to one side of the auxiliary bearing cover 35; wherein one end of the baffle 127 is fixedly connected with the inner wall of the high-pressure shell 12, and the other end of the baffle 127 extends towards the central axis direction of the high-pressure shell 12; the baffle is arranged on the inner wall of the high-pressure shell to change the flow direction of the refrigerant gas in the high-pressure cavity, separate the oil and gas, and reduce the oil discharge amount of the compressor.

[0050] The exhaust bend 127 is arranged at the exhaust port 121; the exhaust bend 127 is arranged inside the high-pressure shell 12, the end of the exhaust bend 127 communicates with the inner side of the exhaust port 121; the exhaust start end 1271 of the exhaust bend 127 is arranged in the low-pressure distribution area in the high-pressure cavity 124; wherein the low-pressure distribution area in the high-pressure cavity 124 is above the refrigerant oil pool 6 and close to the end of the high-pressure shell 12.

[0051] The rolling piston compressor provided by the application separates the sealed cavity in the shell into a low-pressure cavity and a high-pressure cavity by arranging a separation flange plate on the main bearing; during operation, the lubricating oil in the high-pressure cavity enters the axial oil hole of the crankshaft through the oil suction hole on the auxiliary bearing cover, and then is discharged to each lubricating part through multiple radial oil holes along the way; then, most of the lubricating oil flows back to the high-pressure cavity through the oil return channel; the remaining small amount of lubricating oil flows into the low-pressure cavity through the gap formed by the long shaft part of the crankshaft and the cooperation of the crankshaft and the end of the main bearing hole; by introducing the oil return channel in the flow path of the lubricating oil, the lubrication of the pump body assembly is ensured, the refrigeration oil flowing to the low-pressure cavity can be controlled and adjusted, the oil content of the refrigerant gas sucked into the pump body assembly is effectively reduced, and the efficiency and reliability of the compressor are improved; at the same time, the circulation flow path of the lubricating oil is formed by the oil return channel and the axial oil hole, the circulation supply of the lubricating oil is ensured, the lubrication effect of the parts is guaranteed, and the service life of the compressor is effectively improved.

[0052] The application further provides a vehicle comprising the compressor, wherein the compressor is the rolling piston compressor.

[0053] Embodiment 1

[0054] As shown in the accompanying drawings, Figures 1-4 Embodiment 1 provides a rolling piston compressor, which comprises a shell 1, a motor assembly 2 and a pump body assembly 3; wherein the motor assembly 2 and the pump body assembly 3 are both installed in the shell 1.

[0055] The shell 1 comprises a low-pressure shell 11 and a high-pressure shell 12, the low-pressure shell 11 is sealingly connected with the high-pressure shell 12 to form a cylinder structure with a closed inner cavity; the low-pressure shell 11 is provided with an air inlet 111, and the outer side of the open end of the low-pressure shell 11 is provided with a low-pressure shell flange plate 112, a plurality of threaded holes 113 are uniformly arranged on the low-pressure shell flange plate 112 along the circumference; the high-pressure shell 12 is provided with an exhaust port 121, and the outer side of the open end of the high-pressure shell 12 is provided with a high-pressure shell flange plate 122, a plurality of fixed through holes 123 are uniformly arranged on the high-pressure shell flange plate 122 along the circumference.

[0056] The motor assembly 2 comprises a stator 21 and a rotor 22, the stator 21 is press-fitted in the low-pressure shell inner hole 115 of the low-pressure shell 11; the rotor 22 is press-fitted on the long shaft part 311 of the crankshaft 31 of the pump body assembly 3.

[0057] The pump body assembly 3 comprises a crankshaft 31, a cylinder 32, a rolling piston 33, a secondary bearing 34, a secondary bearing cover 35, a main bearing 36 and a main bearing cover 37; the outer side of the main bearing 36 is sleeved with a separation flange plate 361, the inner ring of the separation flange plate 361 is fixedly connected with the outer circumferential surface of the main bearing 36; wherein the separation flange plate 361 and the main bearing 36 adopt an integrated forming structure; the outer ring of the separation flange plate 361 is connected with the shell 1 and is arranged between the open end of the low-pressure shell 11 and the open end of the high-pressure shell 12; a plurality of flange plate through holes 362 are uniformly arranged on the separation flange plate 361 in the circumferential direction; the threaded holes 113, the flange plate through holes 362 and the fixed through holes 123 are arranged one by one.

[0058] The low-pressure shell 11, the separation flange plate 361 and the high-pressure shell 12 are fixedly connected in sequence by a plurality of screws 5; the screws 5 pass through the fixed through holes 123 and the flange plate through holes 362 in sequence and are tightly connected with the threaded holes 113; the separation flange plate 361 separates the inner cavities of the low-pressure shell 11 and the high-pressure shell 12, that is, the low-pressure shell 11 and the first end surface of the separation flange plate 361 form the low-pressure cavity 114, and the high-pressure shell 12 and the second end surface of the separation flange plate 361 form the high-pressure cavity 124; wherein the high-pressure cavity 124 is provided with a refrigerated oil pool 6.

[0059] The motor assembly 2 is arranged in the low-pressure cavity 114, the air inlet 111 communicates with the low-pressure cavity 114; the working cavity 39 of the pump body assembly 3 is arranged in the high-pressure cavity 124, the exhaust port 121 communicates with the high-pressure cavity 124; the suction inlet 391 of the working cavity 39 in the pump body assembly 3 communicates with the low-pressure cavity 114 through the suction passage 38.

[0060] In this embodiment 1, the crankshaft 31 comprises an axial long shaft part 311, a main shaft part, an eccentric part and a secondary shaft part connected in sequence, the long shaft part 311 extends into the low pressure cavity 114; the rotor 22 is sleeved on the long shaft part 311, the main bearing 36 is sleeved on the main shaft part, the rolling piston 33 is matched and arranged on the eccentric part, and the secondary bearing 34 is sleeved on the secondary shaft part; the cylinder assembly 32 is arranged in the high pressure cavity 124, and a working cavity is arranged in the cylinder assembly 32, and the rolling piston 33 is arranged in the working cavity; one end of the cylinder assembly 32 is connected with a first end surface of the secondary bearing 34, and the secondary bearing cover 35 is fixed on a second end surface of the secondary bearing 34; the other end of the cylinder assembly 32 is connected with a first end surface of the main bearing 36, and the main bearing cover 37 is fixed on a second end surface of the main bearing 36; an inner side end of the low pressure shell 11 is provided with a third bearing 4, and an end of the long shaft part 311 is fixed and penetrated in the third bearing 4.

[0061] An axial oil hole 312 is arranged in the crankshaft 31, and a plurality of radial oil holes 313 are arranged on the crankshaft 31 along the axial direction of the crankshaft 31; one end of the radial oil hole 313 is communicated with the axial oil hole 312, and the other end of the radial oil hole 313 is communicated with a lubrication part; the lubrication part comprises the crankshaft 31 and the rolling piston 33, the crankshaft 31 and the secondary bearing 34, and the crankshaft 31 and the main bearing 36.

[0062] An oil suction hole 350 is arranged on the secondary bearing cover 35, one end of the oil suction hole 350 is connected with the refrigerated oil pool 6, and the other end of the oil suction hole 350 is communicated with the axial oil hole 312; an oil supply groove 3601 is arranged on the inner wall of the main bearing hole 360 of the main bearing 36; the oil groove start end of the oil supply groove 3601 is communicated with the axial oil hole 312 through a radial oil hole; an oil return channel 30 is arranged between the oil supply groove 3601 and the flange high pressure cavity end surface 3611 of the separation flange plate 361; the oil return inlet 301 of the oil return channel 30 is communicated with the oil groove end 36010 of the oil supply groove 3601, and the oil return outlet 302 of the oil return channel 30 is penetrated on the surface of the flange high pressure cavity end surface 3611 of the separation flange plate 361; the oil return outlet 302 of the oil return channel 30 is located between the cylinder assembly 32 and the inner wall of the high pressure shell 12.

[0063] The oil return channel 30 includes a first oil return through hole, a second oil return through hole and a third oil return through hole; the first oil return through hole is arranged in the main bearing 36, the second oil return through hole is arranged in the main bearing cover 37, and the third oil return through hole is arranged in the partition flange plate 361; wherein the inlet end of the first oil return through hole is communicated with the oil groove end 36010 and serves as the oil return inlet 301; wherein the distance between the oil groove end 36010 and the end of the main bearing 36 close to the low-pressure cavity 114 is 10 mm; the outlet end of the first oil return through hole is communicated with the inlet end of the second oil return through hole, the outlet end of the second oil return through hole is communicated with the inlet end of the third oil return through hole; the outlet end of the third oil return through hole is penetrated through the surface of the flange plate high-pressure cavity end face 3611 of the partition flange plate 361 and serves as the oil return outlet 302.

[0064] During the operation of the embodiment 1, the lubricating oil stored at the bottom of the high-pressure cavity 124 enters the axial oil hole 312 on the crankshaft 31 through the oil suction hole 350 on the auxiliary bearing cover 35, and then is discharged to each lubricating part through the multiple radial oil holes 313 along the way; finally, most of the used lubricating oil flows to the oil return channel 30, the oil return outlet 302 of the oil return channel 30 is communicated with the high-pressure cavity 124; a small amount of lubricating oil flows into the low-pressure cavity 114 through the gap formed by the cooperation of the long shaft part 311 and the preset length L of the main bearing end 3602; by arranging the oil return channel, the smoothness of oil supply is ensured, the lubrication of the pump body assembly 3 is ensured, the oil amount of the lubricating oil flowing to the low-pressure cavity 114 is effectively controlled, the oil content of the refrigerant gas sucked into the pump body assembly 3 is reduced, and the efficiency and reliability of the compressor are improved.

[0065] In the embodiment 1, the oil baffle 125 is arranged on the inner wall of the high-pressure shell 12; the oil baffle 125 is used to separate the refrigerant gas in the high-pressure cavity 124 from the refrigerant oil pool 6 at the bottom of the high-pressure cavity, so as to block the refrigerant oil from being taken away by the flowing refrigerant gas and reduce the oil discharge amount of the compressor; the baffle 126 is further arranged on the inner wall of the high-pressure shell 12, which is used to change the flow direction of the refrigerant gas in the high-pressure cavity 124, so as to separate the oil and gas and reduce the oil discharge amount of the compressor; the exhaust port 121 is arranged on the high-pressure shell 12 and is communicated with the high-pressure cavity 124 through the exhaust elbow 127; the exhaust initial end 1271 of the exhaust elbow 127 is arranged in the area with low pressure distribution and low oil content in the refrigerant gas in the high-pressure cavity 124.

[0066] In the embodiment 1, the third bearing 4 is arranged on the inner wall of the low-pressure shell 11, and one end of the long shaft portion of the rotor 22 extends out of the low-pressure shell 11 and cooperates with the third bearing 4; the third bearing 4 is a ball bearing or a sliding bearing; the driving plate 7 is arranged on the low-pressure shell 114, and the driving plate 7 is connected to the lead-in wire of the motor assembly 2 through the sealing plug 8 to drive the motor assembly 2 to act; the outer side of the end portion of the low-pressure shell 114 is provided with a driving plate cavity 116; the driving plate 7 is arranged in the driving plate cavity 116, and the driving plate cavity 116 is sealed by the cover plate 117.

[0067] In the embodiment 1, the main bearing 36 is provided with a main bearing cavity 363 on the end face, and the main bearing cavity 363 is filled with working gas, and the main bearing cavity 363 plays a sound-damping role; the main bearing cover 37 is arranged on the end face of the main bearing 36, and the main bearing cover 37 is connected to the main bearing 36 through screws; the sealing member 364 is arranged between the main bearing cover 37 and the end face of the main bearing 36 and between the main bearing cover 37 and the bearing bush of the main bearing 36 for sealing the gas in the cavity 363.

[0068] The rolling piston compressor in the embodiment 1 comprises a shell, a motor assembly comprising a stator and a rotor arranged in the shell, and a pump body assembly driven by the motor assembly; the shell comprises a low-pressure shell and a high-pressure shell; the pump body assembly comprises a main bearing, a main bearing cover, a secondary bearing, a secondary bearing cover, a rolling piston, a crankshaft, and a cylinder; the main bearing is provided with a partition flange plate, and a plurality of flange plate through holes are uniformly distributed in the circumferential direction of the partition flange plate; the partition flange plate separates the low-pressure shell and the high-pressure shell to form a high-pressure cavity and a low-pressure cavity; the motor assembly is arranged in the low-pressure cavity, and the suction inlet of the working cavity of the pump body assembly is communicated with the low-pressure cavity through the suction passage; the pump body assembly and the low-pressure shell and the high-pressure shell are fastened together through the plurality of through holes uniformly distributed in the circumferential direction of the flange plate by screws; the compressor has a simple structure, and the assembly process of the pump body assembly and the motor assembly is good, and the uniformity of the air gap between the stator and the rotor in the motor assembly can be easily ensured.

[0069] In this embodiment 1, in order to control the amount of oil flowing to the low-pressure cavity through the oil groove end of the oil supply groove in the main bearing hole, the distance between the oil groove end of the oil supply groove and the electric component end of the main bearing is L≥2mm; by changing the length of the distance L, the amount of refrigerant oil flowing to the low-pressure cavity can be controlled to ensure that the oil content of the gas sucked from the suction passage is within a reasonable range, to ensure the volumetric efficiency of the compressor and reduce the oil discharge rate of the compressor; in order to reduce the oil discharge amount of the compressor, an oil baffle is arranged on the inner wall of the high-pressure cavity of the high-pressure shell to separate the oil surface of the refrigerant oil pool stored at the bottom of the high-pressure cavity from the refrigerant gas in the high-pressure cavity, so as to block the lubricating oil from being taken away by the flowing high-pressure refrigerant gas; a baffle plate is arranged on the inner wall of the high-pressure shell to change the flow direction of the refrigerant gas in the high-pressure cavity, so as to separate the oil and gas and reduce the oil discharge amount of the compressor. An exhaust elbow is arranged, and the exhaust port of the compressor is communicated with the high-pressure cavity through the exhaust elbow, and the beginning end of the exhaust elbow is arranged in the area with low pressure distribution and low oil content in the refrigerant gas in the high-pressure cavity.

[0070] Embodiment 2

[0071] The rolling piston compressor provided in this embodiment 2 has basically the same structure and principle as the rolling piston compressor described in embodiment 1, and the difference lies in that another implementation mode of the oil return channel 30 is provided in this embodiment 2, which is as follows:

[0072] As shown in the accompanying drawings, Figure 5 the oil return channel 30 includes a first oil return through hole and an oil return pipe 303; the first oil return through hole is arranged in the main bearing 36, and the oil return pipe 303 is located in the low-pressure cavity 114; the inlet end of the first oil return through hole is communicated with the oil groove end 36010 and serves as the oil return inlet 301; the outlet end of the first oil return through hole is communicated with the first end of the oil return pipe 303, and the second end of the oil return pipe 303 penetrates the partition flange plate 361 and is communicated with the surface of the flange plate high-pressure cavity end face 3611 of the partition flange plate 361; wherein the second end of the oil return pipe 303 serves as the oil return outlet 302, and the oil return pipe 303 is located in the low-pressure cavity 114.

[0073] In this embodiment 2, the first oil return through hole is arranged on the main bearing 36, one end of the first oil return through hole is communicated with the oil groove end of the oil supply groove 3601 of the main bearing hole, the other end of the first oil return through hole is connected with the inlet of the oil return pipe 303, and the outlet of the oil return pipe 303 is located on the surface of the flange plate high-pressure cavity end face 3611 of the partition flange plate 361 and is communicated with the high-pressure cavity 124; thus, most of the refrigerant oil in the axial oil hole 312 on the crankshaft flows to the high-pressure cavity 124 through the first oil return through hole on the main bearing and the oil return pipe 303 connected therewith.

[0074] The rolling piston compressor can be a vertical compressor or a horizontal compressor, can be applied to a vehicle, a commercial vehicle, a bus, a rail transit and a ship provided with an air conditioner, and can adopt R744, R134a, R290, R410A or R1234yf as a refrigerant; the shell 1 is divided into a low-pressure shell 11 and a high-pressure shell 12, a separation flange plate 361 on the main bearing 36 is clamped between the low-pressure shell 11 and the high-pressure shell 12 and connected through a fastener; the low-pressure shell 11 can be a shell or composed of several shells and connected through a fastener, but is not limited to the fastener, such as welding; the shell 1 can be made of aluminum, but is not limited to aluminum, such as steel, cast iron or other composite or alloy materials; the pump body assembly 3 and the motor assembly 2 are good in assembly process and easy to ensure uniform air gap between the stator 21 and the rotor 22 in the motor assembly, thereby ensuring the efficiency of the motor assembly.

[0075] In the application, the oil return channel is arranged between the oil supply groove and the flange plate high-pressure cavity end face of the separation flange plate, most of the lubricating oil returns to the high-pressure cavity through the oil return channel after achieving the lubricating purpose, and the remaining small amount of lubricating oil enters the low-pressure cavity, thereby fully ensuring the lubricating effect of the pump body assembly, effectively controlling the amount of lubricating oil entering the low-pressure cavity, reducing the oil content of the refrigerant gas sucked into the pump body assembly, effectively improving the working efficiency and reliability of the compressor, and ensuring the circulation of the lubricating oil and the lubricating effect of the parts, thereby effectively improving the service life of the compressor.

[0076] The above embodiment is only one of the implementation manners of the technical scheme of the application, and the scope of the application is not limited to the embodiment, but also includes any changes, substitutions and other implementation manners easily thought by those skilled in the art within the technical scope disclosed by the application.

Claims

1. A rolling piston compressor, characterized by, The application relates to a pump body assembly and a pump. The outer side of the main bearing (36) is sleeved with a separation flange plate (361), the inner ring of the separation flange plate (361) is fixedly connected with the outer circumferential surface of the main bearing (36), and the outer ring of the separation flange plate (361) is connected with the shell (1); the separation flange plate (361) separates the inner cavity of the shell (1) into a low-pressure cavity (114) and a high-pressure cavity (124); a refrigerated oil pool (6) is arranged in the high-pressure cavity (124); The cylinder assembly (32) is arranged in the high-pressure cavity (124), a working cavity is arranged in the cylinder assembly (32), and the rolling piston (33) is arranged in the working cavity; one end of the cylinder assembly (32) is connected with the first end surface of the auxiliary bearing (34), and the auxiliary bearing cover (35) is fixed on the second end surface of the auxiliary bearing (34); the other end of the cylinder assembly (32) is connected with the first end surface of the main bearing (36), and the main bearing cover (37) is fixed on the second end surface of the main bearing (36); The crankshaft (31) comprises an axial long shaft part (311), a main shaft part, an eccentric part and an auxiliary shaft part which are sequentially connected, the long shaft part (311) extends into the low-pressure cavity (114), the main bearing (36) is sleeved on the main shaft part, the rolling piston (33) is arranged on the eccentric part in a matched mode, and the auxiliary bearing (34) is sleeved on the auxiliary shaft part; an axial oil hole (312) is arranged in the crankshaft (31); An oil suction hole (350) is arranged on the auxiliary bearing cover (35), one end of the oil suction hole (350) is connected with the refrigerated oil pool (6), and the other end of the oil suction hole (350) is connected with the axial oil hole (312) in communication; An oil supply groove (3601) is arranged on the inner wall of the main bearing hole (360) of the main bearing (36), an oil return channel (30) is arranged between the oil supply groove (3601) and the flange plate high-pressure cavity end surface (3611) of the separation flange plate (361); wherein the oil return inlet (301) of the oil return channel (30) is in communication with the oil groove tail end (36010) of the oil supply groove (3601), the oil return outlet (302) of the oil return channel (30) penetrates the surface of the flange plate high-pressure cavity end surface (3611) of the separation flange plate (361), and the oil return outlet (302) of the oil return channel (30) is located between the cylinder assembly (32) and the inner wall of the shell (1); The oil return channel (30) comprises a first oil return through hole, a second oil return through hole and a third oil return through hole; the first oil return through hole is arranged in the main bearing (36), the second oil return through hole is arranged in the main bearing cover (37), and the third oil return through hole is arranged in the separation flange plate (361). The inlet end of the first oil return through hole is communicated with the oil groove end (36010) and serves as the oil return inlet (301); the outlet end of the first oil return through hole is communicated with the inlet end of the second oil return through hole, and the outlet end of the second oil return through hole is communicated with the inlet end of the third oil return through hole; the outlet end of the third oil return through hole is penetrated through the surface of the flange high-pressure cavity end face (3611) of the separation flange (361) and serves as the oil return outlet (302); The oil return channel (30) comprises a first oil return through hole and an oil return pipe (303); the first oil return through hole is arranged in the main bearing (36), and the inlet end of the first oil return through hole is communicated with the oil groove end (36010) and serves as the oil return inlet (301); The outlet end of the first oil return through hole is communicated with the first end of the oil return pipe (303), the second end of the oil return pipe (303) is arranged to penetrate through the separation flange (361), and is penetrated through the surface of the flange high-pressure cavity end face (3611) of the separation flange (361); wherein the second end of the oil return pipe (303) serves as the oil return outlet (302), and the oil return pipe (303) is located in the low-pressure cavity (114).

2. A rolling piston compressor according to claim 1, characterized in that The distance between the oil groove end (36010) and the end of the main bearing (36) close to the low-pressure cavity (114) is L; wherein L≥2mm.

3. A rolling piston compressor according to claim 1, characterized in that The shell (1) comprises a low-pressure shell (11) and a high-pressure shell (12); the low-pressure shell (11) and the high-pressure shell (12) are arranged on the two sides of the separation flange (361) respectively; wherein the low-pressure shell (11) and the first end face of the separation flange (361) jointly form the low-pressure cavity (114), and the high-pressure shell (12) and the second end face of the separation flange (361) jointly form the high-pressure cavity (124); An air inlet (111) is arranged on the low-pressure shell (11), and the air inlet (111) is communicated with the low-pressure cavity (114); an exhaust port (121) is arranged on the high-pressure shell (12), and the exhaust port (121) is communicated with the high-pressure cavity (124).

4. A rolling piston compressor according to claim 3, characterized in that An oil baffle (125) is arranged on the end of the high-pressure shell (12); the oil baffle (125) is located above the refrigerated oil pool (6) and is parallel to the oil liquid surface of the refrigerated oil pool (6); one end of the oil baffle (125) is fixedly connected with the end of the high-pressure shell (12), and the other end of the oil baffle (125) extends towards the side of the auxiliary bearing cover (35).

5. A rolling piston compressor according to claim 3, wherein A baffle (126) is arranged on the inner wall of the high-pressure shell (12); the baffle (126) is arranged along the radial direction of the high-pressure shell (12) and close to the side of the auxiliary bearing cover (35); wherein one end of the baffle (126) is fixedly connected with the inner wall of the high-pressure shell (12), and the other end of the baffle (126) extends towards the central axis direction of the high-pressure shell (12).

6. A rolling piston compressor according to claim 3, wherein The exhaust port (121) is provided with an exhaust elbow (127); the exhaust elbow (127) is arranged inside the high-pressure shell (12), the end of the exhaust elbow (127) is in communication with the inside of the exhaust port (121); the exhaust start end (1271) of the exhaust elbow (127) is arranged in a low-pressure-distribution area in the high-pressure cavity (124); wherein the low-pressure-distribution area in the high-pressure cavity (124) is above the refrigeration oil pool (6) and close to the end of the high-pressure shell (12).

7. A rolling piston compressor according to claim 3, wherein The inside end of the low-pressure shell (11) is provided with a third bearing (4); the end of the long shaft part (311) is fixedly penetrated in the third bearing (4).

8. A vehicle characterized by comprising: The vehicle comprises the rolling piston compressor as claimed in any one of claims 1-7.

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