阅读说明：本技术 一种电动汽车空调用卧式两级旋转压缩机及工作方法 (Horizontal two-stage rotary compressor for electric automobile air conditioner and working method ) 是由 吴建华 杜文清 李澳特 于 2019-10-21 设计创作，主要内容包括：一种电动汽车空调用卧式两级旋转压缩机及工作方法,该压缩机泵体采用非圆形二级气缸作为支撑件,与壳体中段内部的环形端面进行密封和固定,并将压缩机壳体内部分割为低压腔及高压腔,电机处于低压腔,油池处于高压腔；一级气缸相对气缸高度比大,采用双排气结构,在减少气缸直径的同时满足气阀布置及可靠性需求；泵体副轴承径向伸出部分和中间隔板开有供油孔,副轴承及曲轴一级和二级偏心部位设有螺旋油槽,利用吸排气压差将润滑油从油池供入副轴承卸荷油槽和中间隔板内腔,再通过螺旋油槽将润滑油供给至主轴承；本发明可降低两级旋转压缩机的径向尺寸满足车载需求,同时有利于降低压缩机封油量,维持油面平稳,克服现有卧式旋转压缩机的供油问题。(A horizontal two-stage rotary compressor for an electric automobile air conditioner and a working method thereof are disclosed, wherein a pump body of the compressor adopts a non-circular two-stage cylinder as a support piece, the non-circular two-stage cylinder is sealed and fixed with an annular end face in the middle section of a shell, the interior of the shell of the compressor is divided into a low-pressure cavity and a high-pressure cavity, a motor is positioned in the low-pressure cavity, and an oil pool is positioned in the high-pressure cavity; the height ratio of the first-stage cylinder to the cylinder is large, and a double-exhaust structure is adopted, so that the diameter of the cylinder is reduced, and the requirements on air valve arrangement and reliability are met; the radial extension part of the auxiliary bearing of the pump body and the middle partition plate are provided with oil supply holes, the auxiliary bearing and the first-stage and second-stage eccentric parts of the crankshaft are provided with spiral oil grooves, lubricating oil is supplied from an oil pool to an unloading oil groove of the auxiliary bearing and an inner cavity of the middle partition plate by utilizing suction and exhaust pressure difference, and then the lubricating oil is supplied to the main bearing through the spiral oil grooves; the invention can reduce the radial size of the two-stage rotary compressor to meet the vehicle-mounted requirement, is beneficial to reducing the oil sealing amount of the compressor, maintains the oil level to be stable, and overcomes the oil supply problem of the existing horizontal rotary compressor.)

1. A horizontal two-stage rotary compressor for an electric automobile air conditioner comprises a shell (1), a compressor controller (2) arranged on the outer side of the end face of the shell (1), a motor and a pump body arranged in the shell (1); the method is characterized in that: a low-pressure air suction pipe (3), a medium-pressure air suction pipe (18) and a high-pressure exhaust cyclone separator (4) are arranged on the shell (1); the motor is composed of a stator (5) and a rotor (6) arranged at the inner side of the stator (5) in a clearance mode; the pump body comprises a crankshaft (7), a primary rolling piston (16), a secondary rolling piston (17), a primary cylinder (13), a secondary cylinder (10), a secondary bearing (14), a secondary bearing cover plate (15), a middle cover plate (11), a middle partition plate (12), a main bearing (8), a silencer (9), a mixing cavity (19), a middle cavity (20), a low-pressure cavity (21) and a high-pressure cavity (22); the crankshaft (7) is positioned in the center of the pump body and extends into the rotor (6) along the horizontal direction, a first-stage rolling piston (16) is sleeved on a first-stage eccentric part (71) of the crankshaft (7), a second-stage rolling piston (17) is sleeved on a second-stage eccentric part (72) of the crankshaft (7), the first-stage eccentric part (71) of the crankshaft (7) is positioned in the first-stage cylinder (13), the second-stage eccentric part (72) of the crankshaft (7) is positioned in the second-stage cylinder (10), and the second-stage cylinder (10) is positioned on one side close to the motor; two end faces of the primary cylinder (13) are respectively matched and sealed with a middle partition plate (12) and an auxiliary bearing (14), wherein the auxiliary bearing (14) is matched and sealed with an auxiliary bearing cover plate (15) to form a mixing cavity (19), and the middle partition plate (12) is positioned at one side close to the motor and is matched and sealed with a middle cover plate (11) to form a middle cavity (20); two end faces of the secondary cylinder (10) are respectively matched and sealed with a main bearing (8) and an intermediate cover plate (11), and a silencer (9) is arranged on the main bearing (8); the end face of the secondary cylinder (10) connected with the main bearing (8) is matched with the annular end face (101) in the shell (1), meanwhile, the shell (1) is in interference fit with the wall face of the secondary cylinder (10), so as to divide the interior of the compressor shell into two chambers of a low pressure chamber (21) and a high pressure chamber (22), wherein the low-pressure cavity (21) is enclosed by the shell (1) and the inner secondary cylinder (10), the main bearing (8), the muffler (9), the stator (5) and the rotor (6), the high-pressure cavity (22) is enclosed by the shell (1) and the inner secondary cylinder (10), the middle cover plate (11), the middle clapboard (12), the primary cylinder (13), the secondary bearing (14) and the secondary bearing cover plate (15), sealing rings are additionally arranged on the annular end face (101) and the outer wall surface of the secondary cylinder (10) to improve air tightness, and the oil pool (23) is positioned at the bottom of the high-pressure cavity (22).

2. The horizontal two-stage rotary compressor for the air conditioner of the electric vehicle as claimed in claim 1, wherein: the wall surface of the primary cylinder (13) is provided with a primary cylinder sliding vane sliding chute (130) and a primary cylinder air suction structure (132), wherein the primary cylinder air suction structure (132) consists of a primary cylinder axial air suction hole (1320), and a plurality of primary cylinder radial air suction holes (1321) which are connected with the primary cylinder axial air suction hole (1320) and the inner wall surface of the primary cylinder (13); the height ratio of the primary cylinder (13) to the cylinder, namely the ratio of the height to the diameter of the working volume of the cylinder, is 0.5-1.2, a double-exhaust structure is adopted to meet the requirements of air valve arrangement and reliability, exhaust can be simultaneously performed to the mixing cavity (19) and the middle cavity (20), and a primary cylinder medium-pressure mixing through hole (131) is axially formed in the wall surface of the primary cylinder (13) and is used for communicating the mixing cavity (19) with the middle cavity (20); meanwhile, the wall surface of the primary cylinder (11) is axially provided with a primary cylinder high-pressure exhaust through hole (133) for communicating the chamber of the muffler (9) with the high-pressure chamber (22);

the secondary cylinder (10) is of a non-circular structure, and the wall surface of the secondary cylinder is provided with a secondary cylinder sliding vane sliding chute (100) and a secondary cylinder air suction structure (101), wherein the secondary cylinder air suction structure (101) consists of a secondary cylinder axial air suction hole (1010), and a plurality of secondary cylinder radial air suction holes (1011) which are connected with the secondary cylinder axial air suction hole (1010) and the inner wall surface of the secondary cylinder (10); the secondary cylinder (10) is of a single exhaust structure and exhausts gas to a cavity of the muffler (9); the wall surface of the secondary cylinder (10) is axially provided with a secondary cylinder low-pressure air suction through hole (102) which is used for communicating the low-pressure cavity (21) with an axial air suction hole (1320) of the primary cylinder (13); meanwhile, the wall surface of the secondary cylinder (11) is axially provided with a secondary cylinder high-pressure exhaust through hole (103) for communicating the cavity of the muffler (9) with the high-pressure cavity (22); meanwhile, the secondary cylinder (10) is used as a positioning and supporting structure of the pump body, and the bottom of the secondary cylinder is designed to be a plane, so that the secondary cylinder is convenient to mount and fix.

3. The horizontal two-stage rotary compressor for the air conditioner of the electric vehicle as claimed in claim 1, wherein: the matching part of the auxiliary bearing (14) and the primary cylinder (13) is of a non-circular structure, an auxiliary bearing exhaust hole (141) is formed in the matching surface, a radial air supplement hole (143) is formed in the outer wall surface and communicated with a medium-pressure air suction pipe (18) in the shell (1), an auxiliary bearing medium-pressure mixing through hole (142) used for communicating a mixing cavity (19) with a middle cavity (20) and an auxiliary bearing high-pressure exhaust through hole (144) used for communicating a silencer (9) cavity with a high-pressure cavity (22) are formed in the axial direction; a radial protruding part (145) of the auxiliary bearing (14) is immersed in the oil pool (23), an upper auxiliary bearing radial oil hole (146) communicated with an unloading oil groove (147) in the auxiliary bearing (14) is formed in the radial protruding part (145) of the auxiliary bearing (14), and an auxiliary bearing spiral oil groove (148) is formed in the inner surface of the auxiliary bearing (14).

4. The horizontal two-stage rotary compressor for the air conditioner of the electric vehicle as claimed in claim 1, wherein: the auxiliary bearing cover plate (15) is of a circular ring structure, is matched with the auxiliary bearing (14) to form a mixing cavity (19) in a sealing mode, and is provided with an auxiliary bearing cover plate high-pressure exhaust through hole (151) used for communicating a cavity of the silencer (9) with the high-pressure cavity (22) in the axial direction.

5. The horizontal two-stage rotary compressor for the air conditioner of the electric vehicle as claimed in claim 1, wherein: the middle clapboard (12) is provided with a middle clapboard exhaust hole (121), a medium-pressure mixing channel (122) and a medium-pressure suction channel (123); a middle partition plate low-pressure air suction through hole (124) for communicating the low-pressure cavity (21) with the primary cylinder (13), a middle partition plate high-pressure air exhaust through hole (125) for communicating the chamber of the silencer (9) with the high-pressure cavity (22), and a positioning hole (126) assembled with the primary cylinder (13) are axially processed on the wall surface of the middle partition plate (12); the middle clapboard (12) is provided with a middle clapboard radial oil hole (127) in the radial direction.

6. The horizontal two-stage rotary compressor for the air conditioner of the electric vehicle as claimed in claim 1, wherein: the middle cover plate (11) and the middle partition plate (12) are matched and sealed to form a middle cavity (20), a middle cover plate low-pressure air suction through hole (111) used for communicating a low-pressure cavity (21) with a primary cylinder (13) is processed on the wall surface of the middle cover plate (11), a middle cover plate medium-pressure air suction through hole (112) used for communicating an axial air suction hole (1010) of the middle cavity (20) with a secondary cylinder (10) and a middle cover plate high-pressure exhaust through hole (113) used for communicating a chamber of a silencer (9) and a high-pressure cavity (22).

7. The horizontal two-stage rotary compressor for the air conditioner of the electric vehicle as claimed in claim 1, wherein: a main bearing exhaust hole (81), a main bearing high-pressure exhaust through hole (82) for communicating a cavity of the muffler (9) with the high-pressure cavity (22), and an annular plane (83) matched with the muffler (9) are processed on the main bearing (8); the matching part of the main bearing (8) and the secondary cylinder (10) is of a non-circular structure, and the radial protruding part (84) of the main bearing is used for covering a sliding vane sliding groove (100) in the secondary cylinder (10) and preventing lubricating oil and refrigerant from leaking to the low-pressure cavity (21) in a serial mode.

8. The horizontal two-stage rotary compressor for the air conditioner of the electric vehicle as claimed in claim 1, wherein: the muffler (9) is processed with a curled edge (90) to be matched and sealed with an annular plane (83) on the main bearing (8), so that a chamber of the muffler (9) is isolated from the low-pressure chamber (21) to form an independent chamber.

9. The horizontal two-stage rotary compressor for the air conditioner of the electric vehicle as claimed in claim 1, wherein: the crankshaft (7) is of a solid eccentric structure, a primary spiral oil groove (73) is machined in a primary eccentric part (71) of the crankshaft, and a secondary spiral oil groove (74) is machined in a secondary eccentric part (72).

10. The operation method of the horizontal two-stage rotary compressor for the air conditioner of the electric vehicle as claimed in any one of claims 1 to 9, first, the stator (5) of the motor is energized and started through the compressor controller (2), and the rotor (6) is rotated; the rotor (6) drives the crankshaft (7) to rotate, the rotation of the crankshaft (7) drives the first-stage rolling piston (16) to eccentrically rotate in the first-stage cylinder (13), and the second-stage rolling piston (17) eccentrically rotates in the second-stage cylinder (10);

the refrigerant flow in the working process is as follows: a low-pressure refrigerant at the outlet of an evaporator of an air conditioning system of the electric automobile enters a low-pressure cavity (21) from a low-pressure air suction pipe (3) on a shell (1), cools a compressor controller (2) on the outer side of the end face of the shell (1), and cools a motor through a gap between a stator (5) and a rotor (6); a low-pressure refrigerant enters a primary cylinder (13) through a secondary cylinder low-pressure suction hole (102), a middle cover plate low-pressure suction through hole (111), a middle partition plate low-pressure suction through hole (124) and a primary cylinder suction structure (132), rotates along with a crankshaft (7), and is discharged into a mixing cavity (19) through a secondary bearing exhaust hole (141) on a secondary bearing (14) and is discharged into a middle cavity (20) through a middle partition plate exhaust hole (121) on a middle partition plate (12) to complete primary compression; the medium-pressure refrigerant at the outlet of an economizer or a flash tank of an air conditioning system of the electric automobile enters a mixing cavity (19) through a medium-pressure air suction pipe (18) and an auxiliary bearing air supplement hole (143) on a shell (1) to be mixed with primary exhaust, and the mixed medium-pressure refrigerant sequentially passes through an auxiliary bearing medium-pressure mixing through hole (142), a primary cylinder medium-pressure mixing through hole (131) and a medium-pressure mixing channel (122) to enter a middle cavity (20) and is mixed again; the refrigerant after final mixing enters a secondary cylinder (10) through a medium-pressure air suction channel (123), a medium-pressure air suction through hole (112) of an intermediate cover plate and a secondary cylinder air suction structure (101), the compressed high-pressure refrigerant is discharged into a cavity of a silencer (9) through a main bearing exhaust hole (81) on a main bearing (8), and then enters a high-pressure cavity (22) through a main bearing high-pressure exhaust through hole (82), a secondary cylinder high-pressure exhaust through hole (103), a high-pressure exhaust through hole (113) of the intermediate cover plate, a high-pressure exhaust through hole (125) of an intermediate partition plate, a high-pressure exhaust through hole (133) of a primary cylinder, a high-pressure exhaust through hole (144) of a secondary bearing and a high-pressure exhaust through hole (151) of the secondary bearing cover plate, and finally the;

the oil supply flow during the work is as follows: under the action of the pressure difference of refrigerant in the first-stage cylinder (13), the second-stage cylinder (10) and the high-pressure cavity (22), one part of lubricating oil in the oil pool (23) enters an unloading oil groove (147) from an auxiliary bearing radial oil hole (146), and the other part of lubricating oil enters an inner cavity of the intermediate partition plate (12) from an intermediate partition plate radial oil hole (127); with the rotation of the crankshaft (7), one part of the lubricating oil in the unloading oil groove (147) lubricates the auxiliary bearing (14) through the auxiliary bearing spiral oil groove (148), and the other part of the lubricating oil is transferred to the inner cavity of the intermediate partition plate (12) from the primary spiral oil groove (73) on the crankshaft (7) and mixed, so that the lubrication between the primary rolling piston (16) and the primary eccentric part (71) is realized; lubricating oil in the inner cavity of the middle partition plate (12) is transferred to the side of the main bearing (8) from a secondary spiral oil groove (74) on the crankshaft (7), so that lubrication between a secondary rolling piston (17) and a secondary eccentric part (72) is realized; and finally, under the action of the pressure difference of the refrigerant in the secondary cylinder (10) and the low-pressure cavity (21), the lubricating oil migrates to the low-pressure cavity (21) to lubricate the main bearing (8), the lubricating oil entering the low-pressure cavity (21) enters the primary cylinder (13) along with air suction to realize oil return, and a rotary sealing structure is added at the matching section of the main bearing (8) and the crankshaft (7) to reduce the oil outlet amount.

Technical Field

The invention relates to a compressor for an electric automobile air conditioner, in particular to a two-stage horizontal rotary compressor for the electric automobile air conditioner and a working method.

Background

Although the development of the electric automobile industry is rapid at present, the energy consumption problem of an air conditioning system is not solved effectively all the time. The PTC heating is adopted in winter, the running mileage of the electric automobile is seriously attenuated, and particularly, the thermal load requirements of a cab and a battery are met under the low-temperature working condition, so that the problems are more remarkable.

Along with the application of a frequency conversion technology and an air-supplementing enthalpy-increasing heat pump, the performance and the energy efficiency ratio of the air conditioning system of the electric automobile under severe working conditions are effectively improved. The existing air-conditioning compressor of the electric automobile mainly takes a scroll compressor as a main part, and quasi-secondary compression circulation is realized by arranging an air-supplementing and enthalpy-increasing hole on a fixed scroll. However, the electric scroll compressor has long development period, high production cost, large early investment and higher cost.

In addition to electric scroll compressors, electric rotary compressors are also a viable solution. The rotary compressor has the advantages of simple structure, high efficiency, good reliability and low processing cost, and the application range of the rotary compressor is larger and larger compared with that of a scroll compressor in the markets of air conditioners and heat pumps. These are all due to the advantages of the above-mentioned properties, reliability and cost combination. Different from a scroll compressor, the rotary compressor can realize quasi-secondary compression through piston cutting or a check valve structure, and can realize two-stage compression through the form of parallel cylinders, and the air-supplementing and enthalpy-increasing effect of the rotary compressor is superior to that of a quasi-secondary structure. However, the electric automobile has a limit to the installation space of the compressor, the height ratio of the relative cylinder needs to be increased to reduce the radial size of the compressor, and the two-stage compression structure on the air conditioner system of the moving room is difficult to meet the arrangement requirement of the exhaust valve of the first-stage cylinder of the compressor; meanwhile, the problem of oil supply of the horizontal rotary compressor under variable working conditions and different inclination angles still needs to be solved.

Disclosure of Invention

In order to overcome the problems in the prior art, the invention aims to provide a two-stage horizontal rotary compressor for an air conditioner of an electric automobile and a working method thereof, and the two-stage horizontal rotary compressor can further reduce the radial size of the two-stage rotary compressor so as to meet the requirement of the electric automobile on the installation space of the compressor; meanwhile, the oil supply problem of the horizontal rotary compressor is solved, the lubricating capability of the horizontal rotary compressor under variable working conditions and variable inclination angles is improved, and the reliability of the vehicle-mounted compressor is guaranteed.

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

a horizontal two-stage rotary compressor for an electric automobile air conditioner comprises a shell 1, a compressor controller 2 arranged on the outer side of the end face of the shell 1, a motor and a pump body arranged in the shell 1;

a low-pressure air suction pipe 3, a medium-pressure air suction pipe 18 and a high-pressure exhaust cyclone separator 4 are arranged on the shell 1;

the motor is composed of a stator 5 and a rotor 6 arranged inside the stator 5 in a clearance mode;

the pump body comprises a crankshaft 7, a primary rolling piston 16, a secondary rolling piston 17, a primary cylinder 13, a secondary cylinder 10, a secondary bearing 14, a secondary bearing cover plate 15, a middle cover plate 11, a middle partition plate 12, a main bearing 8, a silencer 9, a mixing cavity 19, a middle cavity 20, a low-pressure cavity 21 and a high-pressure cavity 22; the crankshaft 7 is positioned in the center of the pump body and extends into the rotor 6 along the horizontal direction, a first-stage rolling piston 16 is sleeved on a first-stage eccentric part 71 of the crankshaft 7, a second-stage rolling piston 17 is sleeved on a second-stage eccentric part 72 of the crankshaft 7, the first-stage eccentric part 71 of the crankshaft 7 is positioned in the first-stage cylinder 13, the second-stage eccentric part 72 of the crankshaft 7 is positioned in the second-stage cylinder 10, and the second-stage cylinder 10 is positioned at one side close to the motor; two end faces of the primary cylinder 13 are respectively matched and sealed with a middle partition plate 12 and an auxiliary bearing 14, wherein the auxiliary bearing 14 is matched and sealed with an auxiliary bearing cover plate 15 to form a mixing cavity 19, and the middle partition plate 12 is positioned at one side close to the motor and matched and sealed with the middle cover plate 11 to form a middle cavity 20; two end faces of the secondary cylinder 10 are respectively matched and sealed with a main bearing 8 and an intermediate cover plate 11, and a silencer 9 is arranged on the main bearing 8; the end face of the second-stage cylinder 10 connected with the main bearing 8 is matched with an annular end face 101 in the shell 1, meanwhile, the shell 1 and the wall face of the second-stage cylinder 10 are in interference fit, so that the interior of the compressor shell is divided into two chambers, namely a low-pressure chamber 21 and a high-pressure chamber 22, wherein the low-pressure chamber 21 is defined by the shell 1 and the interior second-stage cylinder 10, the main bearing 8, a silencer 9, a stator 5 and a rotor 6, the high-pressure chamber 22 is defined by the shell 1 and the interior second-stage cylinder 10, a middle cover plate 11, a middle partition plate 12, a first-stage cylinder 13, an auxiliary bearing 14 and an auxiliary bearing cover plate 15, sealing rings are additionally arranged on the annular end face 101 and the outer wall face of the second-stage cylinder 10 to improve.

The wall surface of the primary cylinder 13 is provided with a primary cylinder sliding vane sliding chute 130 and a primary cylinder air suction structure 132, wherein the primary cylinder air suction structure 132 consists of a primary cylinder axial air suction hole 1320, a plurality of primary cylinder radial air suction holes 1321 which are connected with the primary cylinder axial air suction hole 1320 and the inner wall surface of the primary cylinder 13; the height ratio (the ratio of the height to the diameter of the working volume of the cylinder) of the primary cylinder 13 relative to the cylinder is 0.5-1.2, a double-exhaust structure is adopted to meet the requirements of air valve arrangement and reliability, exhaust can be simultaneously performed to the mixing cavity 19 and the middle cavity 20, and a primary cylinder medium-pressure mixing through hole 131 is axially formed in the wall surface of the primary cylinder 13 and is used for communicating the mixing cavity 19 and the middle cavity 20; meanwhile, the wall surface of the first-stage cylinder 11 is axially provided with a first-stage cylinder high-pressure exhaust through hole 133 for communicating the chamber of the muffler 9 with the high-pressure cavity 22.

The secondary cylinder 10 is of a non-circular structure, and the wall surface of the secondary cylinder is provided with a secondary cylinder sliding vane sliding chute 100 and a secondary cylinder air suction structure 101, wherein the secondary cylinder air suction structure 101 consists of a secondary cylinder axial air suction hole 1010 and a plurality of secondary cylinder radial air suction holes 1011 connected with the secondary cylinder axial air suction hole 1010 and the inner wall surface of the secondary cylinder 10; the secondary cylinder 10 is of a single exhaust structure and exhausts gas to a cavity of the muffler 9; the wall surface of the secondary cylinder 10 is axially provided with a secondary cylinder low-pressure air suction through hole 102 for communicating the low-pressure cavity 21 with an axial air suction hole 1320 of the primary cylinder 13; meanwhile, the wall surface of the secondary cylinder 11 is axially provided with a secondary cylinder high-pressure exhaust through hole 103 for communicating the cavity of the muffler 9 with the high-pressure cavity 22.

Meanwhile, the secondary cylinder 10 is used as a positioning and supporting structure of the pump body, and the bottom of the secondary cylinder is designed to be a plane, so that the secondary cylinder is convenient to mount and fix.

The matching part of the auxiliary bearing 14 and the primary cylinder 13 is of a non-circular structure, an auxiliary bearing exhaust hole 141 is processed on the matching surface, a radial air supplement hole 143 is processed on the outer wall surface and is communicated with the medium-pressure air suction pipe 18 on the shell 1, an auxiliary bearing medium-pressure mixing through hole 142 for communicating the mixing cavity 19 and the middle cavity 20 and an auxiliary bearing high-pressure exhaust through hole 144 for communicating the cavity of the silencer 9 and the high-pressure cavity 22 are processed in the axial direction; the radially protruding portion 145 of the sub-bearing 14 is immersed in the oil sump 23, and the radially protruding portion 145 of the sub-bearing 14 is formed with an upper sub-bearing radial oil hole 146 communicating to an unloading oil groove 147 inside the sub-bearing 14, while the inner surface of the sub-bearing 14 is formed with a sub-bearing spiral oil groove 148.

The auxiliary bearing cover plate 15 is of a circular ring structure, is matched with the auxiliary bearing 14 to form a mixing cavity 19 in a sealing mode, and is provided with an auxiliary bearing cover plate high-pressure exhaust through hole 151 used for communicating a cavity of the silencer 9 with the high-pressure cavity 22 in the axial direction.

The middle clapboard 12 is provided with a middle clapboard exhaust hole 121, a middle-pressure mixing channel 122 and a middle-pressure suction channel 123; the wall surface of the middle partition plate 12 is axially provided with a middle partition plate low-pressure air suction through hole 124 for communicating the low-pressure cavity 21 with the primary cylinder 13, a middle partition plate high-pressure air exhaust through hole 125 for communicating the chamber of the muffler 9 with the high-pressure cavity 22, and a positioning hole 126 assembled with the primary cylinder 13; the intermediate diaphragm 12 is provided with an intermediate diaphragm radial oil hole 127 in the radial direction.

The middle cover plate 11 and the middle partition plate 12 are matched and sealed to form a middle cavity 20, a middle cover plate low-pressure air suction through hole 111 for communicating the low-pressure cavity 21 with the primary cylinder 13, a middle cover plate medium-pressure air suction through hole 112 for communicating the middle cavity 20 with the axial air suction hole 1010 of the secondary cylinder 10 and a middle cover plate high-pressure exhaust through hole 113 for communicating the chamber of the silencer 9 with the high-pressure cavity 22 are formed in the wall surface of the middle cover plate 11.

A main bearing exhaust hole 81, a main bearing high-pressure exhaust through hole 82 for communicating the chamber of the muffler 9 with the high-pressure cavity 22, and an annular plane 83 matched with the muffler 9 are formed in the main bearing 8; the matching part of the main bearing 8 and the secondary cylinder 10 is of a non-circular structure, and the main bearing radial protrusion part 84 is used for covering a sliding vane sliding groove 100 in the secondary cylinder 10 and preventing lubricating oil and refrigerant from leaking to the low-pressure cavity 21.

The muffler 9 is formed with a bead 90 that cooperates with the annular flat 83 of the main bearing 8 to seal the muffler 9 chamber from the low pressure chamber 21, forming a separate chamber.

The crankshaft 7 is of a solid eccentric structure, a primary spiral oil groove 73 is formed in a primary eccentric portion 71 of the crankshaft, and a secondary spiral oil groove 74 is formed in a secondary eccentric portion 72 of the crankshaft.

Firstly, a stator 5 of a motor is electrified and started through a compressor controller 2, and a rotor 6 rotates; the rotor 6 drives the crankshaft 7 to rotate, the rotation of the crankshaft 7 drives the first-stage rolling piston 16 to eccentrically rotate in the first-stage cylinder 13, and the second-stage rolling piston 17 eccentrically rotate in the second-stage cylinder 10.

When the horizontal two-stage rotary compressor for the air conditioner of the electric automobile is used for the air conditioner system of the electric automobile, a low-pressure refrigerant at the outlet of an evaporator of the air conditioner system of the electric automobile enters a low-pressure cavity 21 from a low-pressure air suction pipe 3 on a shell 1 during working, cools a compressor controller 2 on the outer side of the end surface of the shell 1, and cools a motor through a gap between a stator 5 and a rotor 6; the low-pressure refrigerant enters the primary cylinder 13 through the secondary cylinder low-pressure suction hole 102, the intermediate cover plate low-pressure suction through hole 111, the intermediate partition plate low-pressure suction through hole 124 and the primary cylinder suction structure 132 and rotates along with the crankshaft 7, the compressed medium-pressure refrigerant is discharged into the mixing chamber 19 through the auxiliary bearing exhaust hole 141 on the auxiliary bearing 14 and is discharged into the intermediate chamber 20 through the intermediate partition plate exhaust hole 121 on the intermediate partition plate 12, and primary compression is completed; the medium-pressure refrigerant at the outlet of an economizer or a flash tank of the air conditioning system of the electric automobile enters a mixing cavity 19 through a medium-pressure air suction pipe 18 and an auxiliary bearing air supplement hole 143 on a shell 1 to be mixed with primary exhaust gas, and the mixed medium-pressure refrigerant enters an intermediate cavity 20 through an auxiliary bearing medium-pressure mixing through hole 142, a primary cylinder medium-pressure mixing through hole 131 and a medium-pressure mixing channel 122 in sequence and is mixed again; the finally mixed refrigerant enters the secondary cylinder 10 through the medium-pressure air suction channel 123, the medium-pressure air suction through hole 112 of the intermediate cover plate and the air suction structure 101 of the secondary cylinder, the compressed high-pressure refrigerant is discharged into the cavity of the muffler 9 through the main bearing exhaust hole 81 on the main bearing 8, and then sequentially enters the main bearing high-pressure exhaust through hole 82, the secondary cylinder high-pressure exhaust through hole 103, the intermediate cover plate high-pressure exhaust through hole 113, the intermediate partition plate high-pressure exhaust through hole 125, the primary cylinder high-pressure exhaust through hole 133, the secondary bearing high-pressure exhaust through hole 144 and the secondary bearing cover plate high-pressure exhaust through hole 151 into the high-pressure cavity 22, and finally the refrigerant in the high-pressure cavity 22.

When the lubricating oil pump works, under the action of pressure difference of refrigerant in the primary cylinder 13, the secondary cylinder 10 and the high-pressure cavity 22, one part of the lubricating oil in the oil pool 23 enters the unloading oil groove 147 through the auxiliary bearing radial oil hole 146, and the other part of the lubricating oil enters the inner cavity of the intermediate partition plate 12 through the intermediate partition plate radial oil hole 127; with the rotation of the crankshaft 7, one part of the lubricating oil in the unloading oil groove 147 lubricates the auxiliary bearing 14 through the auxiliary bearing spiral oil groove 148, and the other part of the lubricating oil is transferred to the inner cavity of the intermediate partition plate 12 from the primary spiral oil groove 73 on the crankshaft 7 and mixed, so that the lubrication between the primary rolling piston 16 and the primary eccentric part 71 is realized; lubricating oil in the inner cavity of the middle partition plate 12 is transferred to the side of the main bearing 8 from a secondary spiral oil groove 74 on the crankshaft 7, so that lubrication between the secondary rolling piston 17 and the secondary eccentric part 72 is realized; finally, under the action of the pressure difference of the refrigerant in the secondary cylinder 10 and the low-pressure cavity 21, the lubricating oil migrates to the low-pressure cavity 21 to lubricate the main bearing 8, the lubricating oil entering the low-pressure cavity 21 enters the primary cylinder 13 along with air suction to realize oil return, and a rotary sealing structure is added at the matching section of the main bearing 8 and the crankshaft 7 to reduce the oil output.

Compared with the prior art, the invention has the following advantages:

1. through cylinder and shell cooperation, divide into low pressure cavity and high-pressure cavity with the compressor cavity, the oil bath is in the high pressure side, and lubricating oil can not be because pressure differential, jolt and the inclination change of compressor, and the migration is repeated between the pump body and motor, maintains the oil level height when reducing lubricating oil oiling volume, guarantees steady fuel feeding.

2. The differential pressure oil supply is realized from the oil supply holes on the auxiliary bearing and the intermediate partition plate by utilizing the pressure difference of the air suction and the air exhaust, rather than the oil supply through the central hole of the crankshaft, the additional oil suction assembly and the required centrifugal fan can be omitted, and the cost and the installation process are reduced.

3. The crankshaft does not need a machining center oil hole, is of a solid structure, has improved strength and rigidity, is more suitable for two-stage compression, and reduces the friction and wear of a bearing relative to a structure with a large cylinder height ratio.

4. The single exhaust valve reliability and the life-span problem that relative cylinder altitude ratio promotion brought are solved to one-level cylinder adoption two exhaust structures, and the cylinder adopts non-circular design further to reduce compressor radial dimension simultaneously, makes its volume littleer, and is more compact, and the bottom design is the plane, and the installation of being convenient for is fixed.

5. Compared with a common high-backpressure rotary compressor, the compressor controller can be arranged on the low-pressure side, and the suction cooling controller is utilized without additionally increasing a heat exchanger.

Drawings

Fig. 1 is a schematic structural view of a horizontal two-stage rotary compressor for an electric vehicle air conditioner according to the present invention.

Fig. 2 is a schematic sectional view a-a of the horizontal two-stage rotary compressor of fig. 1.

Fig. 3 is a schematic sectional view of the horizontal two-stage rotary compressor B-B of fig. 1.

Fig. 4 is a schematic cross-sectional view of the horizontal two-stage rotary compressor C-C of fig. 1.

Fig. 5 is a schematic view of a primary cylinder air suction structure according to an embodiment of the invention.

Fig. 6 is a schematic view of a secondary bearing structure according to an embodiment of the present invention.

Fig. 7 is a schematic structural view of a secondary bearing cap according to an embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a middle partition according to an embodiment of the present invention.

Fig. 9 is a schematic sectional view of the intermediate partition a-a of fig. 8.

Fig. 10 is a schematic structural diagram of an intermediate cover plate according to an embodiment of the present invention.

FIG. 11 is a schematic structural view of a main bearing according to an embodiment of the present invention.

Fig. 12 is a schematic view showing the structure of a muffler according to an embodiment of the present invention.

Fig. 13 is a schematic view of a crankshaft structure according to an embodiment of the present invention.

Fig. 14 is a refrigerant path diagram in the operation of the horizontal two-stage rotary compressor for an electric vehicle air conditioner according to the present invention.

Fig. 15 is a diagram showing an oil supply path of the horizontal two-stage rotary compressor for an electric vehicle air conditioner according to the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, the two-stage horizontal rotary compressor for the air conditioner of the electric vehicle of the present invention comprises a shell 1, a compressor controller 2 arranged outside the end surface of the shell 1, and a motor and a pump body arranged inside the shell 1; a low-pressure air suction pipe 3, a medium-pressure air suction pipe 18 and a high-pressure exhaust cyclone separator 4 are arranged on the shell 1; the motor is composed of a stator 5 and a rotor 6 arranged inside the stator 5 in a clearance mode; the pump body comprises a crankshaft 7, a primary rolling piston 16, a secondary rolling piston 17, a primary cylinder 13, a secondary cylinder 10, a secondary bearing 14, a secondary bearing cover plate 15, a middle cover plate 11, a middle partition plate 12, a main bearing 8, a silencer 9, a mixing cavity 19, a middle cavity 20, a low-pressure cavity 21 and a high-pressure cavity 22; the crankshaft 7 is positioned in the center of the pump body and extends into the rotor 6 along the horizontal direction, a first-stage rolling piston 16 is sleeved on a first-stage eccentric part 71 of the crankshaft 7, a second-stage rolling piston 17 is sleeved on a second-stage eccentric part 72 of the crankshaft 7, the first-stage eccentric part 71 of the crankshaft 7 is positioned in the first-stage cylinder 13, the second-stage eccentric part 72 of the crankshaft 7 is positioned in the second-stage cylinder 10, and the second-stage cylinder 10 is positioned at one side close to the motor; two end faces of the primary cylinder 13 are respectively matched and sealed with a middle partition plate 12 and an auxiliary bearing 14, wherein the auxiliary bearing 14 is matched and sealed with an auxiliary bearing cover plate 15 to form a mixing cavity 19, and the middle partition plate 12 is positioned at one side close to the motor and matched and sealed with the middle cover plate 11 to form a middle cavity 20; two end faces of the secondary cylinder 10 are respectively matched and sealed with a main bearing 8 and an intermediate cover plate 11, and a silencer 9 is arranged on the main bearing 8; the end face of the second-stage cylinder 10 connected with the main bearing 8 is matched with an annular end face 101 in the shell 1, meanwhile, the shell 1 and the wall face of the second-stage cylinder 10 are in interference fit, so that the interior of the compressor shell is divided into two chambers, namely a low-pressure chamber 21 and a high-pressure chamber 22, wherein the low-pressure chamber 21 is defined by the shell 1 and the interior second-stage cylinder 10, the main bearing 8, the muffler 9, the stator 5 and the rotor 6, the high-pressure chamber 22 is defined by the shell 1 and the interior second-stage cylinder 10, the middle cover plate 11, the middle partition plate 12, the first-stage cylinder 13, the auxiliary bearing 14 and the auxiliary bearing cover plate 15, and the oil pool 23 is.

Fig. 2 and 5 are schematic views of a primary cylinder structure according to an embodiment of the present invention. The wall surface of the primary cylinder 13 is provided with a primary cylinder sliding vane sliding chute 130 and a primary cylinder air suction structure 132, wherein the primary cylinder air suction structure 132 consists of a primary cylinder axial air suction hole 1320, a plurality of primary cylinder radial air suction holes 1321 which are connected with the primary cylinder axial air suction hole 1320 and the inner wall surface of the primary cylinder 13; the height ratio (the ratio of the height to the diameter of the working volume of the cylinder) of the primary cylinder 13 relative to the cylinder is 0.5-1.2, a double-exhaust structure is adopted to meet the requirements of air valve arrangement and reliability, exhaust can be simultaneously performed to the mixing cavity 19 and the middle cavity 20, and a primary cylinder medium-pressure mixing through hole 131 is axially formed in the wall surface of the primary cylinder 13 and is used for communicating the mixing cavity 19 and the middle cavity 20; meanwhile, the wall surface of the first-stage cylinder 11 is axially provided with a first-stage cylinder high-pressure exhaust through hole 133 for communicating the chamber of the muffler 9 with the high-pressure cavity 22.

Fig. 3 is a schematic diagram of a two-stage cylinder structure according to an embodiment of the present invention. The secondary cylinder 10 is of a non-circular structure, and the wall surface of the secondary cylinder is provided with a secondary cylinder sliding vane sliding chute 100 and a secondary cylinder air suction structure 101, wherein the secondary cylinder air suction structure 101 consists of a secondary cylinder axial air suction hole 1010 and a plurality of secondary cylinder radial air suction holes 1011 connected with the secondary cylinder axial air suction hole 1010 and the inner wall surface of the secondary cylinder 10; the secondary cylinder 10 is of a single exhaust structure and exhausts gas to a cavity of the muffler 9; the wall surface of the secondary cylinder 10 is axially provided with a secondary cylinder low-pressure air suction through hole 102 for communicating the low-pressure cavity 21 with an axial air suction hole 1320 of the primary cylinder 13; meanwhile, the wall surface of the secondary cylinder 11 is axially provided with a secondary cylinder high-pressure exhaust through hole 103 for communicating the cavity of the muffler 9 with the high-pressure cavity 22. Meanwhile, the secondary cylinder 10 is used as a positioning and supporting structure of the pump body, and the bottom of the secondary cylinder is designed to be a plane, so that the secondary cylinder is convenient to mount and fix.

Fig. 4 and 6 are schematic views of a secondary bearing structure according to an embodiment of the present invention. The matching part of the auxiliary bearing 14 and the primary cylinder 13 is of a non-circular structure, an auxiliary bearing exhaust hole 141 is processed on the matching surface, a radial air supplement hole 143 is processed on the outer wall surface and is communicated with the medium-pressure air suction pipe 18 on the shell 1, an auxiliary bearing medium-pressure mixing through hole 142 for communicating the mixing cavity 19 and the middle cavity 20 and an auxiliary bearing high-pressure exhaust through hole 144 for communicating the cavity of the silencer 9 and the high-pressure cavity 22 are processed in the axial direction; the radially protruding portion 145 of the sub-bearing 14 is immersed in the oil sump 23, and the radially protruding portion 145 of the sub-bearing 14 is formed with an upper sub-bearing radial oil hole 146 communicating to an unloading oil groove 147 inside the sub-bearing 14, while the inner surface of the sub-bearing 14 is formed with a sub-bearing spiral oil groove 148.

Fig. 7 is a schematic structural diagram of a secondary bearing cap according to an embodiment of the present invention. The auxiliary bearing cover plate 15 is of a circular ring structure, is matched with the auxiliary bearing 14 to form a mixing cavity 19 in a sealing mode, and is provided with an auxiliary bearing cover plate high-pressure exhaust through hole 151 used for communicating a cavity of the silencer 9 with the high-pressure cavity 22 in the axial direction.

Fig. 8 and 9 are schematic views of the structure of the intermediate partition plate according to the embodiment of the present invention. The middle clapboard 12 is provided with a middle clapboard exhaust hole 121, a middle-pressure mixing channel 122 and a middle-pressure suction channel 123; the wall surface of the middle partition plate 12 is axially provided with a middle partition plate low-pressure air suction through hole 124 for communicating the low-pressure cavity 21 with the primary cylinder 13, a middle partition plate high-pressure air exhaust through hole 125 for communicating the chamber of the muffler 9 with the high-pressure cavity 22, and a positioning hole 126 assembled with the primary cylinder 13; the intermediate diaphragm 12 is provided with an intermediate diaphragm radial oil hole 127 in the radial direction.

Fig. 10 is a schematic view of an intermediate cover plate according to an embodiment of the present invention. The middle cover plate 11 and the middle partition plate 12 are matched and sealed to form a middle cavity 20, a middle cover plate low-pressure air suction through hole 111 for communicating the low-pressure cavity 21 with the primary cylinder 13, a middle cover plate medium-pressure air suction through hole 112 for communicating the middle cavity 20 with the axial air suction hole 1010 of the secondary cylinder 10 and a middle cover plate high-pressure exhaust through hole 113 for communicating the chamber of the silencer 9 with the high-pressure cavity 22 are formed in the wall surface of the middle cover plate 11.

Fig. 11 is a schematic view of a main bearing structure according to an embodiment of the present invention. A main bearing exhaust hole 81, a main bearing high-pressure exhaust through hole 82 for communicating the chamber of the muffler 9 with the high-pressure cavity 22, and an annular plane 83 matched with the muffler 9 are formed in the main bearing 8; the matching part of the main bearing 8 and the secondary cylinder 10 is of a non-circular structure, and the main bearing radial protrusion part 84 is used for covering a sliding vane sliding groove 100 in the secondary cylinder 10 and preventing lubricating oil and refrigerant from leaking to the low-pressure cavity 21.

Fig. 12 is a schematic view of a muffler structure according to an embodiment of the present invention. The muffler 9 is formed with a bead 90 that cooperates with the annular flat 83 of the main bearing 8 to seal the muffler 9 chamber from the low pressure chamber 21, forming a separate chamber.

Fig. 13 is a schematic view of a crankshaft structure according to an embodiment of the present invention. The crankshaft 7 is of a solid eccentric structure, a primary spiral oil groove 73 is formed in a primary eccentric portion 71 of the crankshaft, and a secondary spiral oil groove 74 is formed in a secondary eccentric portion 72 of the crankshaft.

Firstly, a stator 5 of a motor is electrified and started through a compressor controller 2, and a rotor 6 rotates; the rotor 6 drives the crankshaft 7 to rotate, the rotation of the crankshaft 7 drives the first-stage rolling piston 16 to eccentrically rotate in the first-stage cylinder 13, and the second-stage rolling piston 17 eccentrically rotate in the second-stage cylinder 10.

Referring to fig. 14, the refrigerant path of the horizontal two-stage rotary compressor for an air conditioner of an electric vehicle according to the present invention during operation is as shown by the arrow in the figure, and the low-pressure refrigerant at the outlet of the evaporator of the air conditioner system of the electric vehicle enters the low-pressure chamber 21 from the low-pressure suction pipe 3 on the housing 1, cools the compressor controller 2 outside the end face of the housing 1, and cools the motor through the gap between the stator 5 and the rotor 6; the low-pressure refrigerant enters the primary cylinder 13 through the secondary cylinder low-pressure suction hole 102, the intermediate cover plate low-pressure suction through hole 111, the intermediate partition plate low-pressure suction through hole 124 and the primary cylinder suction structure 132 and rotates along with the crankshaft 7, the compressed medium-pressure refrigerant is discharged into the mixing chamber 19 through the auxiliary bearing exhaust hole 141 on the auxiliary bearing 14 and is discharged into the intermediate chamber 20 through the intermediate partition plate exhaust hole 121 on the intermediate partition plate 12, and primary compression is completed; the medium-pressure refrigerant at the outlet of an economizer or a flash tank of the air conditioning system of the electric automobile enters a mixing cavity 19 through a medium-pressure air suction pipe 18 and an auxiliary bearing air supplement hole 143 on a shell 1 to be mixed with primary exhaust gas, and the mixed medium-pressure refrigerant enters an intermediate cavity 20 through an auxiliary bearing medium-pressure mixing through hole 142, a primary cylinder medium-pressure mixing through hole 131 and a medium-pressure mixing channel 122 in sequence and is mixed again; the finally mixed refrigerant enters the secondary cylinder 10 through the medium-pressure air suction channel 123, the medium-pressure air suction through hole 112 of the intermediate cover plate and the air suction structure 101 of the secondary cylinder, the compressed high-pressure refrigerant is discharged into the cavity of the muffler 9 through the main bearing exhaust hole 81 on the main bearing 8, and then sequentially enters the main bearing high-pressure exhaust through hole 82, the secondary cylinder high-pressure exhaust through hole 103, the intermediate cover plate high-pressure exhaust through hole 113, the intermediate partition plate high-pressure exhaust through hole 125, the primary cylinder high-pressure exhaust through hole 133, the secondary bearing high-pressure exhaust through hole 144 and the secondary bearing cover plate high-pressure exhaust through hole 151 into the high-pressure cavity 22, and finally the refrigerant in the high-pressure cavity 22.

FIG. 15 is a diagram of the oil supply path of the present invention, in which a portion of the lubricating oil in the oil sump 23 enters the unloading oil groove 147 through the auxiliary bearing radial oil hole 146 and another portion enters the inner cavity of the intermediate partition 12 through the intermediate partition radial oil hole 127 under the pressure difference of the refrigerant in the primary cylinder 13, the secondary cylinder 10 and the high pressure chamber 22; with the rotation of the crankshaft 7, one part of the lubricating oil in the unloading oil groove 147 lubricates the auxiliary bearing 14 through the auxiliary bearing spiral oil groove 148, and the other part of the lubricating oil is transferred to the inner cavity of the intermediate partition plate 12 from the primary spiral oil groove 73 on the crankshaft 7 and mixed, so that the lubrication between the primary rolling piston 16 and the primary eccentric part 71 is realized; lubricating oil in the inner cavity of the middle partition plate 12 is transferred to the side of the main bearing 8 from a secondary spiral oil groove 74 on the crankshaft 7, so that lubrication between the secondary rolling piston 17 and the secondary eccentric part 72 is realized; finally, under the action of the pressure difference of the refrigerant in the secondary cylinder 10 and the low-pressure cavity 21, the lubricating oil migrates to the low-pressure cavity 21 to lubricate the main bearing 8, and the lubricating oil entering the low-pressure cavity 21 enters the primary cylinder 13 along with the suction gas to realize oil return.