CN115898879A - Rolling piston type compressor and vehicle - Google Patents

Abstract

The invention discloses a rolling piston type compressor and a vehicle, comprising a shell and a pump body assembly arranged in the shell; an axial oil hole is formed in the crankshaft of the pump body assembly; an oil suction hole is formed in the auxiliary bearing cover, one end of the oil suction hole is connected with the frozen oil pool, and the other end of the oil suction hole is communicated with the axial oil hole; an oil supply groove is formed in the inner wall of a main bearing hole of the main bearing, and an oil return channel is formed between the oil supply groove and the end face of the high-pressure cavity of the flange plate for separating the flange plate; an oil return inlet of the oil return channel is communicated with the tail end of the oil groove of the oil supply groove, and an oil return outlet of the oil return channel is communicated with the surface of the end face of the flange plate high-pressure cavity of the separating flange plate; an oil return outlet of the oil return passage is positioned between the cylinder assembly and the inner wall of the shell; the invention realizes the effective control of the amount of lubricating oil entering the low-pressure cavity, reduces the oil content of refrigerant gas sucked into the pump body assembly, ensures the circulating supply of lubricating oil liquid, and effectively improves the working efficiency and reliability of the compressor.

Description

Rolling piston type compressor and vehicle

Technical Field

The invention belongs to the technical field of compressors, and particularly relates to a rolling piston type compressor and a vehicle.

Background

The rolling piston type compressor drives a crankshaft to rotate through a motor component so as to drive a rolling piston to rotate in a working cavity of the cylinder, so that the processes of air suction, compression and exhaust are realized; the axial oil hole is formed in the center of the crankshaft, and lubricating oil flows to the main bearing part and the auxiliary bearing part along the axial oil hole to achieve the effect of lubricating and radiating.

At present, a 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, chinese patent application "compressor and vehicle with the same" (application number: CN 201710054923.9); the oil suction passage, the axial oil hole and the plurality of radial oil outlet holes are combined to form an oil flow path, and the oil flow path is designed in a one-way mode, so that the oil amount entering the low-pressure cavity cannot be controlled, the oil content of refrigerant gas sucked into the pump body assembly is high, and the working performance and the reliability of the compressor are seriously influenced; secondly, the oil flow path with the unidirectional design has poor oil circulation and smoothness, greatly reduces the lubricating effect and seriously influences the service life of the compressor.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides a rolling piston type compressor and a vehicle, aiming at solving the problems that the oil flow path adopting the one-way design in the prior art cannot control the oil amount entering a low-pressure cavity, so that the oil content of refrigerant gas sucked into a pump body assembly is high, and the working performance and the reliability of the compressor are seriously influenced; poor oil liquid circulation and smoothness, greatly reduced lubrication effect, and seriously influenced the service life of the compressor.

In order to achieve the purpose, the invention adopts the technical scheme that:

the invention provides a rolling piston compressor, which comprises a shell and a pump body assembly arranged in the shell, wherein the pump body assembly comprises a cylinder body and a cylinder cover; the pump body assembly comprises a crankshaft, a cylinder assembly, a rolling piston, an auxiliary bearing cover, a main bearing and a main bearing cover;

a separation flange is sleeved on the outer side of the main bearing, the inner ring of the separation flange is fixedly connected with the outer circumferential surface of the main bearing, and the outer ring of the separation flange is connected with the shell; the separation flange plate divides the inner cavity of the shell into a low-pressure cavity and a high-pressure cavity; a refrigerating oil pool is arranged in the high-pressure cavity;

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

the crankshaft comprises a long shaft part, a main shaft part, an eccentric part and an auxiliary shaft part which are sequentially connected in the axial direction, and the long shaft part extends into the low-pressure cavity; the main bearing is sleeved on the main shaft part, the rolling piston is arranged on the eccentric part in a matching way, and the auxiliary bearing is sleeved on the auxiliary shaft part; an axial oil hole is formed in the crankshaft;

an oil suction hole is formed in the auxiliary bearing cover, one end of the oil suction hole is connected with the frozen oil pool, and the other end of the oil suction hole is communicated with the axial oil hole;

an oil supply groove is formed in the inner wall of a main bearing hole of the main bearing, and an oil return channel is formed between the oil supply groove and the end face of the high-pressure cavity of the flange plate of the separation flange plate; an oil return inlet of the oil return channel is communicated with the tail end of the oil groove of the oil supply groove, and an oil return outlet of the oil return channel is communicated with the surface of the end face of the flange plate high-pressure cavity of the separation flange plate; an oil return outlet of the oil return passage is located between the cylinder assembly and the inner wall of the housing.

Further, the oil return passage 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 formed in the main bearing, the second oil return through hole is formed in the main bearing cover, and the third oil return through hole is formed in the separating flange plate;

the inlet end of the first oil return through hole is communicated with the tail end of the oil groove and serves as the oil return inlet; 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; and the outlet end of the third oil return through hole is communicated with the surface of the end face of the flange plate high-pressure cavity of the separation flange plate and serves as the oil return outlet.

Further, the oil return passage 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 communicated with the tail end of the oil groove and serves as the oil return inlet;

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 through the separating flange plate and is communicated with the surface of the end face of the flange plate high-pressure cavity of the separating flange plate; and the second end of the oil return pipe is used as the oil return outlet, and the oil return pipe is positioned in the low-pressure cavity.

Further, the distance between the end of the oil groove and the end of the main bearing close to the low-pressure cavity is L; wherein L is more than or equal to 2mm.

Further, the housing comprises a low pressure housing and a high pressure housing; the low-pressure shell and the high-pressure shell are respectively arranged on two sides of the separating flange plate; the low-pressure shell and the first end face of the separation flange plate are encircled to form the low-pressure cavity, and the high-pressure shell and the second end face of the separation flange plate are encircled to form the high-pressure cavity;

the low-pressure shell is provided with an air inlet which is communicated with the low-pressure cavity; and an exhaust port is arranged on the high-pressure shell and is communicated with the high-pressure cavity.

Further, an oil baffle plate is arranged at the end part of the high-pressure shell; the oil baffle plate is positioned above the freezing oil pool and is parallel to the oil liquid level of the freezing oil pool; one end of the oil baffle is fixedly connected with the end part of the high-pressure shell, and the other end of the oil baffle extends towards one side of the auxiliary bearing cover.

Furthermore, a baffle plate is arranged on the inner wall of the high-pressure shell; the baffle plate is arranged along the radial direction of the high-pressure shell and is close to one side of the auxiliary bearing cover; one end of the baffle plate is fixedly connected with the inner wall of the high-pressure shell, and the other end of the baffle plate extends towards the direction of the central axis of the high-pressure shell.

Further, an exhaust elbow is arranged at the exhaust port; the exhaust elbow is arranged in the high-pressure shell, and the tail end of the exhaust elbow is communicated with the inner side of the exhaust port; the exhaust starting end of the exhaust elbow is arranged in a region with low pressure distribution in the high-pressure cavity; the area with low pressure distribution in the high-pressure cavity is an area above the frozen oil pool and close to the end part of the high-pressure shell.

Further, a third bearing is arranged at the end part of the inner side of the low-pressure shell; the end part of the long shaft part is fixedly arranged in the third bearing in a penetrating way.

The invention also provides a vehicle comprising the rolling piston compressor.

Compared with the prior art, the invention has the beneficial effects that:

the invention provides a rolling piston type compressor and a vehicle.A return oil channel is arranged between an oil supply groove and the end surface of a flange plate high-pressure cavity of a separation flange plate, most of lubricating oil flows back to the high-pressure cavity through the return oil channel after the purpose of lubrication is achieved, and a small amount of residual lubricating oil enters the low-pressure cavity, so that the lubricating effect of a pump body assembly is fully ensured, the effective control of the amount of the lubricating oil entering the low-pressure cavity is achieved, the oil content of refrigerant gas sucked into the pump body assembly is reduced, and the working efficiency and the reliability of the compressor are effectively improved; meanwhile, the oil return channel and the axial oil hole form a circulating flow path of lubricating oil, so that the circulating supply of the lubricating oil is ensured, the lubricating effect of parts is ensured, and the service life of the compressor is effectively prolonged; the device has simple structure, high reliability and convenient processing and manufacturing.

Further, with the terminal distance L more than or equal to 2mm setting with the main bearing tip of oil groove, through the length that changes distance L, can control the oil mass of the lubricated fluid that flows to the low pressure chamber to ensure that pump body subassembly is in reasonable within range from the inspiratory channel inspiratory refrigerant gas oil content, guarantee the volumetric efficiency of compressor, reduce compressor oil extraction rate.

Furthermore, the oil baffle plate is arranged at the end part of the high-pressure shell, so that the oil level of the lubricating oil stored at the bottom of the high-pressure cavity is separated from the refrigerant gas in the high-pressure cavity, and the refrigerant oil is prevented from being taken away by the flowing high-pressure refrigerant gas.

Furthermore, the baffle plate is arranged on the inner wall of the high-pressure shell, the flowing direction of refrigerant gas in the high-pressure cavity is changed, oil and gas are separated, and the oil discharge amount of the compressor is reduced.

Drawings

Fig. 1 is a sectional view of a rolling piston compressor according to embodiment 1;

FIG. 2 is a schematic view showing a pump body assembly according to embodiment 1;

FIG. 3 is a schematic view showing a partial connection structure of a main bearing and a main bearing cap in embodiment 1;

FIG. 4 is a cross sectional view of the main bearing in embodiment 1;

fig. 5 is a sectional view of the rolling piston compressor according to embodiment 2.

The device comprises a shell 1, a motor assembly 2, a pump body assembly 3, a third bearing 4, a screw 5, a refrigerating oil pool 6, a driving plate 7 and a sealing plug-in unit 8, wherein the motor assembly 2 is connected with the pump body assembly; 11, a low-pressure shell, a 111 air inlet, 112 low-pressure shell flange plates, 113 threaded holes, 114 low-pressure cavities, 115 low-pressure shell inner holes, 116 drive plate cavities and 117 cover plates; 12 high-pressure shell, 121 exhaust port, 122 high-pressure shell flange, 123 fixing through hole, 124 high-pressure cavity, 125 oil baffle plate, 126 baffle plate, 127 exhaust elbow and 1271 exhaust starting end; 21 stator, 22 rotor; 30 oil return passages, 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; a 32 cylinder assembly; 33 a rolling piston; 34 secondary bearings; 35 auxiliary bearing covers, 350 oil suction holes; 36 a main bearing; 360 main bearing holes, 3601 oil supply grooves, 36010 oil groove tail ends and 3602 main bearing tail ends; 361 separating the flange plate and 3611 the end surface of the high-pressure cavity of the flange plate; 362 flange through holes; 363 a main bearing cavity; 364 a main bearing seal; 37 a main bearing cap; 38 an air intake passage; 39 working chamber, 391 suction inlet.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects of the present invention more apparent, the following embodiments further describe the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.

The invention provides a rolling piston compressor, which comprises a shell 1, a motor component 2 and a pump body component 3, wherein the shell is provided with a plurality of grooves; the motor assembly 2 and the pump body assembly 3 are both installed in the shell 1.

The shell 1 comprises a low-pressure shell 11 and a high-pressure shell 12, wherein the low-pressure shell 11 is connected with the high-pressure shell 12 in a sealing manner to form a cylinder structure with a sealed inner cavity; the inner cavity of the low pressure housing 11 is a low pressure cavity 114, and the inner cavity of the high pressure housing 12 is a high pressure cavity; 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; the motor assembly 2 is disposed in the low pressure chamber 114; the working chamber of the pump block assembly 3 is disposed in the high pressure chamber 124, and the suction inlet 391 of the working chamber of the pump block assembly 3 communicates with the low pressure chamber 114 through the suction passage 38.

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 pressed on the crankshaft of the pump body assembly 3.

The pump body assembly 3 comprises a crankshaft 31, a cylinder assembly 32, a rolling piston 33, an auxiliary bearing 34, an auxiliary bearing cover 35, a main bearing 36 and a main bearing cover 37; a separation flange 361 is sleeved on the outer side of the main bearing 36, and the inner ring of the separation flange 361 is fixedly connected with the outer circumferential surface of the main bearing 36; the outer ring of the separation flange 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 361 partitions the sealed inner ring of the housing 1 into the low-pressure chamber 114 and the high-pressure chamber 124.

Specifically, the low-pressure shell 11 and the high-pressure shell 12 are respectively arranged on two sides of the partition flange 361, and the low-pressure shell 11, the partition flange 361 and the high-pressure shell 12 are fixedly connected together sequentially through screws 5; a low-pressure shell flange plate 112 is arranged on the outer side of the opening end of the low-pressure shell 11, and a plurality of threaded holes 113 are uniformly formed in the low-pressure shell flange plate 112 along the circumferential direction; a plurality of flange plate through holes 362 are uniformly formed in the separating flange plate 361 along the circumferential direction; a high-pressure shell flange 122 is arranged on the outer side of the opening end of the high-pressure shell 12, and a plurality of fixing through holes 123 are uniformly formed in the high-pressure shell flange 122 along the circumferential direction; the threaded holes 113, the flange plate through holes 362 and the fixing through holes 123 are arranged in a one-to-one correspondence manner; the screw 5 sequentially penetrates through the fixing through hole 123 and the flange plate through hole 362, and is fastened and connected with the threaded hole 113; the low-pressure housing 11 and a first end face of the partition flange 361 surround to form the low-pressure cavity 114, and the high-pressure housing 12 and a second end face of the partition flange 361 surround to form the high-pressure cavity 124; wherein, a freezing oil pool 6 is arranged in the high-pressure cavity 124.

The crankshaft 31 comprises a long shaft part 311, a main shaft part, an eccentric part and an auxiliary shaft part which are sequentially connected in the axial direction, and 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 arranged on the eccentric part in a matching manner, and the auxiliary bearing 34 is sleeved on the auxiliary shaft part; 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 a first end face of the secondary bearing 34, and the secondary bearing cover 35 is fixed on a second end face of the secondary bearing 34; the other end of the cylinder assembly 32 is connected with a first end face of the main bearing 36, and the main bearing cover 37 is fixed on a second end face of the main bearing 36; the end part of the inner side of the low pressure shell 11 is provided with a third bearing 4, and the end part of the long shaft part 311 is fixedly arranged in the third bearing 4 in a penetrating way.

An axial oil hole 312 is formed in the crankshaft 31, and a plurality of radial oil holes 313 are formed in the crankshaft 31 along the axial direction of the crankshaft; 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 part to be lubricated; the parts to be lubricated include between the crankshaft 31 and the rolling piston 33, between the crankshaft 31 and the secondary bearing 34, and between the crankshaft 31 and the primary bearing 36.

An oil suction hole 350 is formed in the auxiliary bearing cover 35, one end of the oil suction hole 350 is connected to the frozen 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 formed in the inner wall of a main bearing hole 360 of the main bearing 36; wherein an 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 plate high-pressure cavity end face 3611 of the separation flange plate 361; an oil return inlet 301 of the oil return passage 30 is communicated with an oil groove tail end 36010 of the oil supply groove 3601, and an oil return outlet 302 of the oil return passage 30 is communicated with the surface of a flange high-pressure cavity end face 3611 of the separation flange 361; wherein a return oil outlet 302 of the return oil passage 30 is located between the cylinder assembly 32 and an inner wall of the high pressure housing 12.

The oil return passage 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 separating flange 361; the inlet end of the first oil return through hole is communicated with the oil groove tail 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 communicated with the surface of the flange high-pressure cavity end face 3611 of the separation flange 361 and serves as the oil return outlet 302.

In the present invention, another implementation method of the oil return passage 30 is also provided, which specifically includes the following steps:

the oil return passage 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 tail end 36010 of the oil groove and is used 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 through the separation flange 361 and is communicated with the surface of the flange high-pressure cavity end face 3611 of the separation flange 361; wherein a 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 chamber 114.

The distance between the oil groove end 36010 and the end part of the main bearing 36 close to the low pressure cavity 114 is L; wherein L is more than or equal to 2mm; by changing the length of the distance L, the oil quantity of lubricating oil flowing to the low-pressure cavity can be controlled, so that the oil content of refrigerant gas sucked by the pump body assembly from the suction channel is ensured within a reasonable range, the volumetric efficiency of the compressor is ensured, and the oil discharge rate of the compressor is reduced.

An oil baffle plate 125 is arranged at the end part of the high-pressure shell 12; the oil baffle 125 is positioned above the freezing oil pool 6 and is parallel to the oil liquid level of the freezing oil pool 6; one end of the oil baffle 125 is fixedly connected to the end of the high-pressure housing 12, and the other end of the oil baffle 125 extends toward one side of the auxiliary bearing cap 36; the oil baffle plate is arranged at the end part of the high-pressure shell, so that the oil level of lubricating oil stored at the bottom of the high-pressure cavity is separated from refrigerant gas in the high-pressure cavity, and the refrigerant oil is prevented from being taken away by flowing high-pressure refrigerant gas.

A baffle plate 127 is arranged on the inner wall of the high-pressure shell 12; the baffle 127 is arranged along the radial direction of the high-pressure shell 12 and close to one side of the auxiliary bearing cover 35; one end of the baffle plate 127 is fixedly connected with the inner wall of the high-pressure shell 12, and the other end of the baffle plate 127 extends towards the central axis direction of the high-pressure shell 12; the baffle plate is arranged on the inner wall of the high-pressure shell, the flowing direction of refrigerant gas in the high-pressure cavity is changed, oil and gas are separated, and the oil discharge amount of the compressor is reduced.

An exhaust elbow 127 is arranged at the exhaust port 121; the exhaust elbow 127 is arranged inside the high-pressure shell 12, and the tail end of the exhaust elbow 127 is communicated with the inner side of the exhaust port 121; the exhaust beginning 1271 of the exhaust elbow 127 is positioned in a region of low pressure distribution within the high pressure chamber 124; the area in the high-pressure chamber 124 where the pressure distribution is low is the area above the frozen oil pool 6 and near the end of the high-pressure casing 12.

According to the rolling piston type compressor, the separation flange plate is arranged on the main bearing, and a closed inner cavity in the shell is separated into a low-pressure cavity and a high-pressure cavity by the separation flange plate; when the crankshaft lubricating device works, lubricating oil in a high-pressure cavity enters an axial oil hole of the crankshaft from an oil suction hole in the auxiliary bearing cover and is discharged to each lubricating part from a plurality of 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 rest small part of lubricating oil flows into the low-pressure cavity through a gap formed by matching a long shaft part of the crankshaft and the tail end of the main bearing hole; by introducing the oil return channel into the flow path of the lubricating oil, the pump body assembly can be ensured to be fully lubricated, the controllable adjustment of the refrigerating machine oil flowing to the low-pressure cavity is realized, the oil content of refrigerant gas sucked into the pump body assembly is effectively reduced, and the efficiency and the reliability of the compressor are improved; meanwhile, a circulating flow path of lubricating oil is formed by the oil return channel and the axial oil hole, so that the circulating supply of the lubricating oil is ensured, the lubricating effect of parts is ensured, and the service life of the compressor is effectively prolonged.

The invention also provides a vehicle which comprises a compressor, wherein the compressor adopts the rolling piston type compressor.

Example 1

As shown in fig. 1-4, embodiment 1 provides a rolling piston compressor, which includes a casing 1, a motor assembly 2 and a pump body assembly 3; the motor assembly 2 and the pump body assembly 3 are both installed in the shell 1.

The shell 1 comprises a low-pressure shell 11 and a high-pressure shell 12, wherein the low-pressure shell 11 is connected with the high-pressure shell 12 in a sealing manner to form a cylinder structure with a sealed inner cavity; an air inlet 111 is formed in the low-pressure shell 11, a low-pressure shell flange 112 is arranged on the outer side of the opening end of the low-pressure shell 11, and a plurality of threaded holes 113 are uniformly distributed in the low-pressure shell flange 112 along the circumference; the high-pressure shell 12 is provided with an exhaust port 121, a high-pressure shell flange 122 is arranged on the outer side of the opening end of the high-pressure shell 12, and a plurality of fixing through holes 123 are uniformly distributed on the high-pressure shell flange 122 along the circumference.

The motor assembly 2 comprises a stator 21 and a rotor 22, wherein the stator 21 is pressed in a low-pressure shell inner hole 115 of the low-pressure shell 11; the rotor 22 is press-fitted to the long shaft portion 311 of the crankshaft 31 of the pump block assembly 3.

The pump body assembly 3 comprises a crankshaft 31, a cylinder 32, a rolling piston 33, an auxiliary bearing 34, an auxiliary bearing cover 35, a main bearing 36 and a main bearing cover 37; a separation flange 361 is sleeved on the outer side of the main bearing 36, and the inner ring of the separation flange 361 is fixedly connected with the outer circumferential surface of the main bearing 36; the separating flange 361 and the main bearing 36 are in an integral molding structure; the outer ring of the separation flange 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 formed in the separating flange plate 361 along the circumferential direction; the threaded holes 113, the flange through holes 362 and the fixing through holes 123 are arranged in a one-to-one correspondence manner.

The low-pressure shell 11, the separating flange 361 and the high-pressure shell 12 are fixedly connected together through a plurality of screws 5 in sequence; the screw 5 penetrates through the fixing through hole 123 and the flange plate through hole 362 in sequence and is fastened and connected with the threaded hole 113; the partition flange 361 partitions the inner cavities of the low-pressure housing 11 and the high-pressure housing 12, that is, the low-pressure housing 11 and a first end surface of the partition flange 361 surround to form the low-pressure chamber 114, and the high-pressure housing 12 and a second end surface of the partition flange 361 surround to form the high-pressure chamber 124; wherein, a freezing oil pool 6 is arranged in the high-pressure cavity 124.

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

In embodiment 1, the crankshaft 31 includes a long shaft portion 311, a main shaft portion, an eccentric portion, and an auxiliary shaft portion, which are sequentially connected in the axial direction, and the long shaft portion 311 extends into the low pressure chamber 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 arranged on the eccentric part in a matching manner, and the auxiliary bearing 34 is sleeved on the auxiliary shaft part; 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 air cylinder assembly 32 is connected with a first end face of the secondary bearing 34, and the secondary bearing cover 35 is fixed at a second end face of the secondary bearing 34; the other end of the cylinder assembly 32 is connected with a first end face of the main bearing 36, and the main bearing cover 37 is fixed on a second end face of the main bearing 36; the end part of the inner side of the low pressure shell 11 is provided with a third bearing 4, and the end part of the long shaft part 311 is fixedly arranged in the third bearing 4 in a penetrating way.

An axial oil hole 312 is formed in the crankshaft 31, and a plurality of radial oil holes 313 are formed in the crankshaft 31 along the axial direction of the crankshaft; 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 part to be lubricated; the parts to be lubricated include 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.

An oil suction hole 350 is formed in the auxiliary bearing cover 35, one end of the oil suction hole 350 is connected to the frozen 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 formed in the inner wall of a main bearing hole 360 of the main bearing 36; wherein an oil groove starting 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 plate high-pressure cavity end face 3611 of the separation flange plate 361; an oil return inlet 301 of the oil return passage 30 is communicated with an oil groove tail end 36010 of the oil supply groove 3601, and an oil return outlet 302 of the oil return passage 30 is communicated with the surface of a flange high-pressure cavity end face 3611 of the separation flange 361; wherein the oil return outlet 302 of the oil return passage 30 is located between the cylinder assembly 32 and the inner wall of the high pressure housing 12.

The oil return passage 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 separating flange 361; the inlet end of the first oil return through hole is communicated with the oil groove tail end 36010 and serves as the oil return inlet 301; wherein, the distance between the oil groove tail end 36010 and the end part of the main bearing 36 close to one side of the low pressure cavity 114 is 10mm; 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 communicated with the surface of the flange high-pressure cavity end face 3611 of the separation flange 361 and serves as the oil return outlet 302.

In the operation of the embodiment 1, the lubricating oil stored at the bottom of the high pressure chamber 124 enters the axial oil hole 312 of the crankshaft 31 through the oil suction hole 350 of the auxiliary bearing cover 35, and is discharged to each lubricating part through the plurality of radial oil holes 313 along the way; finally, most of the lubrication used oil flows to the oil return passage 30, and an oil return outlet 302 of the oil return passage 30 communicates with the high pressure chamber 124; a small amount of lubricating oil flows into the low-pressure chamber 114 through a gap formed by matching the long shaft part 311 with the preset length L of the main bearing tail end 3602; through setting up the oil return passage, guaranteed the smooth and easy nature of fuel feeding, can ensure that pump body subassembly 3 is lubricated abundant, effectively controlled the oil mass of the lubricating oil liquid of flow direction low pressure chamber 114, reduced the gaseous oil content of refrigerant that inhales in pump body subassembly 3, improved the efficiency and the reliability of compressor.

In this embodiment 1, an oil baffle 125 is disposed on an inner wall of the high-pressure casing 12; the oil baffle 125 is used for separating refrigerant gas in the refrigerant oil pool 6 at the bottom of the high-pressure cavity from refrigerant gas in the high-pressure cavity 124 so as to prevent the refrigerant oil from being taken away by the flowing refrigerant gas and reduce the oil discharge amount of the compressor; a baffle plate 126 is further arranged on the inner wall of the high-pressure shell 12 and used for changing the flow direction of refrigerant gas in the high-pressure cavity 124 so as to separate oil from 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 an exhaust elbow 127; the exhaust start end 1271 of the exhaust elbow 127 is positioned in a region with low pressure distribution and low oil content in the refrigerant gas in the high pressure chamber 124.

In this embodiment 1, a third bearing 4 is disposed on the inner wall of the low pressure housing 11, and one end of the long shaft portion extending out of the rotor 22 is engaged with the third bearing 4; wherein, the third bearing 4 is a ball bearing or a sliding bearing; a driving plate 7 is installed on the low-voltage shell 114, and the driving plate 7 is connected with a lead-in wire of the motor assembly 2 through a sealing plug-in unit 8 so as to drive the motor assembly 2 to act; a driving plate cavity 116 is arranged outside the end part of the low-voltage shell 114; the driving plate 7 is installed in the driving plate cavity 116, and the driving plate cavity 116 is sealed by a cover plate 117.

In this embodiment 1, a main bearing cavity 363 is disposed on an end surface of the main bearing 36, working gas is in the main bearing cavity 363, and the main bearing cavity 363 performs a noise reduction function; the end face of the main bearing 36 is covered with a main bearing cover 37, and the main bearing cover 37 is connected with the main bearing 36 through a screw; sealing seals 364 are provided between the end faces of main bearing cap 37 and main bearing 36 and between the main bearing cap 37 and the bearing shell of main bearing 36 for sealing the gas in the cavity 363.

The rolling piston compressor in embodiment 1 includes a casing, a motor assembly including a stator and a rotor and a pump assembly driven by the motor assembly; the shell comprises a low-pressure shell and a high-pressure shell; the pump body component comprises a main bearing, a main bearing cover, an auxiliary bearing cover, a rolling piston, a crankshaft and a cylinder; a separation flange is arranged on the main bearing, and a plurality of flange through holes are uniformly distributed on the separation flange along the circumferential direction; the low-pressure shell and the high-pressure shell are separated by the separating flange plate to form a high-pressure cavity and a low-pressure cavity; the electric component is arranged in the low-pressure cavity, and the air inlet of the compressor is arranged on the low-pressure shell and communicated with the low-pressure cavity; the working cavity of the pump body assembly is arranged in the high-pressure cavity, and the exhaust port of the compressor is arranged on the high-pressure shell and communicated with the high-pressure cavity; the suction inlet of the working cavity is communicated with the low-pressure cavity through a suction channel; the pump body assembly, the low-pressure shell and the high-pressure shell are fastened together by screws through a plurality of through holes which are uniformly distributed on the flange plate along the circumferential direction; the compressor has the advantages of simple structure, good assembly manufacturability of the pump body assembly and the motor assembly, and easy guarantee of uniform air gap between the stator and the rotor in the motor assembly.

In this embodiment 1, in order to control the amount of oil flowing to the low-pressure cavity through the end of the oil groove of the oil supply groove in the main bearing hole, the distance L between the end of the oil groove of the oil supply groove and the end of the main bearing close to the electric component is greater than or equal to 2mm; the oil quantity of the refrigerating machine oil flowing to the low-pressure cavity can be controlled by changing the length of the distance L, so that the oil content of gas sucked from the suction channel is ensured to be in a reasonable range, the volumetric efficiency of the compressor is ensured, and the oil discharge rate of the compressor is reduced; in order to reduce the oil discharge amount of the compressor, an oil baffle plate is arranged on the inner wall of a high-pressure cavity on a high-pressure shell, and the oil level of a refrigeration oil pool stored at the bottom of the high-pressure cavity is separated from refrigerant gas in the high-pressure cavity so as to prevent lubricating oil from being taken away by flowing high-pressure refrigerant gas; the inner wall of the high-pressure shell is provided with the baffle plate, so that the flowing direction of refrigerant gas in the high-pressure cavity is changed, oil and gas are separated, and the oil discharge of the compressor is reduced. The air exhaust elbow is arranged, an air exhaust port of the compressor is communicated with the high-pressure cavity through the air exhaust elbow, and the starting end of the air exhaust elbow is arranged in a region with low pressure distribution and low oil content in refrigerant gas in the high-pressure cavity.

Example 2

The rolling piston compressor provided in embodiment 2 is basically the same as the rolling piston compressor described in embodiment 1 in structure and principle, and the difference is that: in this embodiment 2, another implementation manner of the oil return passage 30 is provided, which is specifically as follows:

as shown in fig. 5, the oil return passage 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 positioned in the low-pressure cavity 114; the inlet end of the first oil return through hole is communicated with the tail end 36010 of the oil groove 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 through the separation flange 361 and is communicated with the surface of the flange high-pressure cavity end face 3611 of the separation flange 361; wherein a 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 chamber 114.

In this embodiment 2, a first oil return through hole is formed in the main bearing 36, and 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 an inlet of an oil return pipe 303, and an outlet of the oil return pipe 303 is positioned on the surface of the flange plate high-pressure cavity end face 3611 of the separation flange plate 361 and is communicated with the high-pressure cavity 124; therefore, most of the refrigerating machine oil in the axial oil hole 312 of the crankshaft flows into the high-pressure chamber 124 through the first oil return through hole of the main bearing and the oil return pipe 303 connected thereto.

The rolling piston compressor can be a vertical compressor or a horizontal compressor; the compressor can be applied to equipment provided with air conditioners, such as passenger cars, commercial vehicles, bus cars, rail transit, steamships and the like; the compressor can adopt refrigerants such as R744, R134a, R290, R410A or R1234 yf; the shell 1 is divided into a low-pressure shell 11 and a high-pressure shell 12, and a separating flange 361 on the main bearing 36 is clamped between the low-pressure shell 11 and the high-pressure shell 12 and is connected with the low-pressure shell 11 and the high-pressure shell 12 through fasteners; the low-pressure housing 11 may be a single housing or may be composed of several housings, and the housings are connected by fasteners, but not limited to fasteners, such as welding; the material of the shell 1 may be an aluminum material, but is not limited to an aluminum material, such as a steel material, a cast iron material, or other composite materials or alloy materials; the pump body assembly 3 and the motor assembly 2 are good in assembly manufacturability, the uniformity of an air gap between the stator 21 and the rotor 22 in the motor assembly is easily guaranteed, and the efficiency of the motor assembly is guaranteed.

According to the invention, the oil return channel is arranged between the oil supply groove and the end face of the high-pressure cavity of the flange plate of the separating flange plate, most of lubricating oil flows back to the high-pressure cavity through the oil return channel after the lubricating purpose is achieved, and the rest small amount of lubricating oil enters the low-pressure cavity, so that the lubricating effect of the pump body assembly is fully ensured, the effective control of the lubricating oil entering the low-pressure cavity is realized, the oil content of refrigerant gas sucked into the pump body assembly is reduced, and the working efficiency and the reliability of the compressor are effectively improved; meanwhile, the circulating supply of lubricating oil is ensured, the lubricating effect of parts is ensured, and the service life of the compressor is effectively prolonged.

The above-described embodiment is only one of the embodiments that can implement the technical solution of the present invention, and the scope of the present invention is not limited by the embodiment, but includes any variations, substitutions and other embodiments that can be easily conceived by those skilled in the art within the technical scope of the present invention disclosed.

Claims (10)

1. A rolling piston compressor is characterized by comprising a shell (1) and a pump body assembly (3) arranged in the shell (1); the pump body assembly (3) comprises a crankshaft (31), a cylinder assembly (32), a rolling piston (33), an auxiliary bearing (34), an auxiliary bearing cover (35), a main bearing (36) and a main bearing cover (37);

a separation flange plate (361) is sleeved on the outer side of the main bearing (36), 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 separating flange plate (361) divides the inner cavity of the shell (1) into a low-pressure cavity (114) and a high-pressure cavity (124); a refrigeration 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 air cylinder component (32) is connected with a first end face of the secondary bearing (34), and the secondary bearing cover (35) is fixed on a second end face of the secondary bearing (34); the other end of the cylinder assembly (32) is connected with a first end face of the main bearing (36), and the main bearing cover (37) is fixed on a second end face of the main bearing (36);

the crankshaft (31) comprises a long shaft part (311), a main shaft part, an eccentric part and an auxiliary shaft part which are sequentially connected in the axial direction, and 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 matching manner, and the auxiliary bearing (34) is sleeved on the auxiliary shaft part; an axial oil hole (312) is formed in the crankshaft (31);

an oil suction hole (350) is formed in the auxiliary bearing cover (35), one end of the oil suction hole (350) is connected with the frozen 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 formed in the inner wall of a main bearing hole (360) of the main bearing (36), and an oil return channel (30) is formed between the oil supply groove (3601) and the flange plate high-pressure cavity end face (3611) of the separation flange plate (361); an oil return inlet (301) of the oil return channel (30) is communicated with an oil groove tail end (36010) of the oil supply groove (3601), and an oil return outlet (302) of the oil return channel (30) is communicated with the surface of a flange plate high-pressure cavity end face (3611) of the separation flange plate (361); an oil return outlet (302) of the oil return passage (30) is located between the cylinder assembly (32) and an inner wall of the housing (1).

2. A rolling piston compressor according to claim 1, characterised in that the oil return channel (30) comprises a first, a second and a third oil return through hole; the first oil return through hole is formed in the main bearing (36), the second oil return through hole is formed in the main bearing cover (37), and the third oil return through hole is formed in the separating flange plate (361);

wherein an inlet end of the first oil return through hole is communicated with the oil groove end (36010) and is used 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 communicated with the surface of the flange high-pressure cavity end face (3611) of the separation flange (361) and serves as the oil return outlet (302).

3. A rolling piston compressor according to claim 1, characterized in that 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 tail end (36010) of the oil groove and is used 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 through the separation flange plate (361) and is communicated with the surface of a flange plate high-pressure cavity end face (3611) of the separation flange plate (361); wherein a 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 chamber (114).

4. A rolling piston compressor according to claim 1, characterized in that the oil groove end (36010) is at a distance L from the end of the main bearing (36) on the side close to the low pressure chamber (114); wherein L is more than or equal to 2mm.

5. A rolling piston compressor according to claim 1, characterized in that the housing (1) comprises a low pressure housing (11) and a high pressure housing (12); the low-pressure shell (11) and the high-pressure shell (12) are respectively arranged on two sides of the separating flange plate (361); the low-pressure shell (11) and a first end face of the separation flange plate (361) are encircled to form the low-pressure cavity (114), and the high-pressure shell (12) and a second end face of the separation flange plate (361) are encircled to form the high-pressure cavity (124);

the low-pressure shell (11) is provided with an air inlet (111), and the air inlet (111) is communicated with the low-pressure cavity (114); an exhaust port (121) is formed in the high-pressure shell (12), and the exhaust port (121) is communicated with the high-pressure cavity (124).

6. A rolling piston compressor according to claim 5, characterized in that the end of the high pressure housing (12) is provided with an oil baffle (125); the oil baffle plate (125) is positioned above the freezing oil pool (6) and is parallel to the oil liquid level of the freezing oil pool (6); one end of the oil baffle plate (125) is fixedly connected with the end part of the high-pressure shell (12), and the other end of the oil baffle plate (125) extends towards one side of the auxiliary bearing cover (36).

7. A rolling piston compressor according to claim 5, characterised in that the inner wall of the high pressure housing (12) is provided with baffles (127); the baffle plate (127) is arranged along the radial direction of the high-pressure shell (12) and close to one side of the auxiliary bearing cover (35); one end of the baffle plate (127) is fixedly connected with the inner wall of the high-pressure shell (12), and the other end of the baffle plate (127) extends towards the direction of the central axis of the high-pressure shell (12).

8. A rolling piston compressor according to claim 5, characterized in that a discharge elbow (127) is provided at the discharge opening (121); the exhaust elbow (127) is arranged inside the high-pressure shell (12), and the tail end of the exhaust elbow (127) is communicated with the inner side of the exhaust port (121); the exhaust beginning (1271) of the exhaust elbow (127) is positioned in a region of low pressure distribution within the high pressure chamber (124); wherein the area with low pressure distribution in the high pressure cavity (124) is the area above the freezing oil pool (6) and close to the end of the high pressure shell (12).

9. A rolling piston compressor according to claim 5, characterised in that the inboard end of the low pressure housing (11) is provided with a third bearing (4); the end part of the long shaft part (311) is fixedly arranged in the third bearing (4) in a penetrating way.

10. A vehicle, characterized in that the vehicle comprises a rolling piston compressor according to any one of claims 1-9.

Images