CN214406545U

CN214406545U - Centrifugal compressor and refrigerating system of refrigerant liquid lubrication bearing

Info

Publication number: CN214406545U
Application number: CN202120116029.1U
Authority: CN
Inventors: 商萍君; 王丽梅; 张丽仙; 赵欣欣; 陈利军
Original assignee: Wuxi Institute of Technology
Current assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Priority date: 2021-01-17
Filing date: 2021-01-17
Publication date: 2021-10-15
Anticipated expiration: 2031-01-17

Abstract

The utility model discloses a refrigerant fluid lubrication bearing's centrifugal compressor and refrigerating system, air feed distribution pipeline and condensation pressure sensor including non-impeller end bearing, electric motor rotor axle, motor stator, impeller end bearing, condenser, evaporimeter, high-pressure liquid storage pot, radial footstep bearing, a serial communication port, the equal fixed connection of non-impeller end bearing, electric motor rotor axle, motor stator, impeller end bearing is in the compressor main part, the electric motor rotor axle is located motor stator, the beneficial effects of the utility model are that: the liquid pump is used for guiding cooling liquid into the vacuum pump before and after the vacuum pump is started and closed, and the cooling liquid enters the bearing through the liquid pump bypass pipeline and the bypass liquid path one-way valve to supply liquid, so that the purpose that the liquid supply of the rolling bearing is uninterrupted is realized, the whole-course lubrication of the rolling bearing is driven, the damage is avoided, and the rolling bearing compressor lubricated by the refrigerant is safely and stably started, operated and stopped.

Description

Centrifugal compressor and refrigerating system of refrigerant liquid lubrication bearing

Technical Field

The utility model relates to a centrifugal compressor technical field specifically is a refrigerant liquid lubrication bearing's centrifugal compressor and refrigerating system.

Background

The centrifugal compressor is also called as a vortex-light compressor, is one of compressors, has a structure and an operation principle similar to those of a centrifugal blower, is always multi-stage, can enable gas to obtain higher pressure, has higher treatment capacity and higher efficiency, and the bearing of the centrifugal compressor is a semi-closed centrifugal compressor adopting a rolling bearing, a sliding bearing or a magnetic suspension bearing.

Whereas the lubricating oil has a viscosity of 12-30Cst, for providing lubrication and cooling of the bearings, noise reduction; the viscosity of the refrigerant liquid is 0.15-0.2Cst, so that the rolling bearing using the liquid refrigerant as the lubricant cannot bear lubrication, cool and reduce noise under high-speed operation without special design, and the rolling bearing cannot be provided with a fully lubricated liquid refrigerant, so that the rolling bearing compressor cannot be safely and stably started, operated and stopped by the refrigerant lubrication.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a refrigerant liquid lubrication bearing's centrifugal compressor and refrigerating system to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a centrifugal compressor and a refrigeration system of a refrigerant liquid lubrication bearing comprise a non-impeller end bearing, a motor rotor shaft, a motor stator, an impeller end bearing, a condenser, an evaporator, a high-pressure liquid storage tank, an air supply distribution pipeline of a radial thrust bearing and a condensation pressure sensor, and are characterized in that the non-impeller end bearing, the motor rotor shaft, the motor stator and the impeller end bearing are all fixedly connected in a compressor main body, the motor rotor shaft is positioned in the motor stator, the non-impeller end bearing is positioned at the rear side of the motor rotor shaft, the impeller end bearing is positioned at the front side of the motor rotor shaft, the air supply distribution pipeline of the radial thrust bearing is fixedly connected between the non-impeller end bearing and the impeller end bearing, the front end of the compressor main body is fixedly connected with a centrifugal compressor volute, the impeller is fixedly connected in the centrifugal compressor volute and positioned at the front end of the impeller end bearing, the centrifugal compressor is characterized in that a variable diffuser is fixedly connected to the outer side of the impeller in the centrifugal compressor volute, a liquid pump is fixedly connected between the outer side of the centrifugal compressor volute and the condenser, a compressor suction pipeline is fixedly connected to the middle position of the front end of the centrifugal compressor volute and the evaporator, and a motor cooling return pipeline is fixedly connected between the compressor suction pipeline and the compressor body.

Preferably, the liquid level sensor switch is close to liquid storage pot heat regenerator inlet and liquid storage pot heat regenerator gas outlet of evaporimeter one side lower extreme fixedly connected with, a motor cooling liquid outlet bearing of fixedly connected with goes out the liquid pipeline between liquid storage pot heat regenerator inlet and the compressor main part, a heat regenerator return line of fixedly connected with between liquid storage pot heat regenerator gas outlet and the evaporimeter, a medium voltage heat regenerator of fixedly connected with in the high-pressure liquid storage pot, liquid storage pot heat regenerator inlet one side lower extreme fixedly connected with liquid level sensor switch is kept away from to the high-pressure liquid storage pot, a reservoir of fixedly connected with supplies liquid to the bearing and gives the liquid main line between high-pressure liquid storage pot bottom and the compressor main part.

Preferably, one end of the condenser, which is far away from the compressor exhaust pipeline, is fixedly connected with a condenser outlet liquid phase pipeline, one end of the condenser outlet liquid phase pipeline, which is far away from the condenser, is fixedly connected with an evaporator liquid supply pipeline, one end of the evaporator liquid supply pipeline is fixedly connected with an evaporator, one end of the evaporator liquid supply pipeline, which is far away from the evaporator, is fixedly connected with a liquid pump bypass pipeline, one end of the liquid pump bypass pipeline, which is far away from the evaporator liquid supply pipeline, is fixedly connected with a liquid reservoir liquid supply pipeline, one end of the liquid reservoir liquid supply pipeline, which is far away from the liquid pump bypass pipeline, is fixedly connected with a high-pressure liquid storage tank, the compressor body is fixedly connected with a motor cooling liquid supply pipeline, the motor cooling liquid supply pipeline, which is far away from one end of the compressor body, is fixedly connected with the evaporator liquid supply pipeline and is located between the evaporator and the condenser outlet liquid phase pipeline, a liquid pump pipeline is fixedly connected between the liquid pump bypass pipeline and the liquid supply pipeline of the liquid reservoir, and a liquid pump is fixedly connected to the liquid pump pipeline.

Preferably, the evaporimeter feed liquid pipeline just is located a main throttle electronic expansion valve of fixedly connected with between motor cooling feed liquid pipeline and the evaporimeter on the road, liquid pump is last just to be located the liquid pump and keeps away from liquid pump bypass pipeline one side fixedly connected with one pump back liquid way check valve, liquid pump bypass pipeline and reservoir feed liquid pipeline junction fixedly connected with bypass liquid way check valve, motor cooling feed liquid pipeline is close to motor cooling throttle electronic expansion valve of compressor main part one side fixedly connected with, compressor exhaust pipe goes up fixedly connected with exhaust check valve.

Preferably, an evaporation pressure sensor is fixedly connected to the evaporator, an air supply pressure sensor is fixedly connected to one side of the compressor body and is located on the liquid storage device-bearing liquid supply main pipeline, a condensation pressure sensor is fixedly connected to the condenser, an air return pressure sensor is fixedly connected to the motor cooling air return pipeline, and a high-pressure liquid storage tank pressure sensor is fixedly connected to the high-pressure liquid storage tank.

Compared with the prior art, the beneficial effects of the utility model are that: the liquid pump is used for guiding cooling liquid into the vacuum pump before and after the vacuum pump is started and closed, and the cooling liquid enters the bearing through the liquid pump bypass pipeline and the bypass liquid path one-way valve to supply liquid, so that the purpose that the liquid supply of the rolling bearing is uninterrupted is realized, the whole-course lubrication of the rolling bearing is driven, the damage is avoided, and the rolling bearing compressor lubricated by the refrigerant is safely and stably started, operated and stopped.

Drawings

FIG. 1 is a flow chart I of a cooling system of the present invention;

FIG. 2 is a flow chart II of the cooling system of the present invention;

FIG. 3 is a flow chart III of the cooling system of the present invention;

fig. 4 is a flow chart IV of the cooling system of the present invention.

In the figure: 1. a non-impeller end bearing; 2. a motor rotor shaft; 3. a motor stator; 4. an impeller end bearing; 5. an impeller; 6. a centrifugal compressor volute; 7. a variable diffuser; 8. a condenser; 9. a main throttle electronic expansion valve; 10. an evaporator; 11. a liquid pump; 12. a post-pump fluid path check valve; 13. a bypass fluid path check valve; 14. the motor cools the electronic expansion valve of throttle; 15. an exhaust check valve; 16. a high-pressure liquid storage tank; 17. a liquid level sensor switch; 18. a liquid inlet of a liquid storage tank heat regenerator; 19. a gas outlet of the liquid storage tank heat regenerator; 20. a medium pressure heat regenerator; 21. a first solenoid valve; 22. a second solenoid valve; 23. a compressor main body; 100. the air supply distribution pipeline of the radial thrust bearing; 101. a compressor discharge line; 102. a condenser outlet liquid phase pipeline; 103. an evaporator liquid supply line; 104. a liquid pump line; 105. a liquid pump bypass line; 106. a reservoir supply line; 107. a reservoir to a bearing liquid supply main pipeline; 108. a motor cooling liquid supply pipeline; 109. a liquid outlet pipeline of the liquid outlet bearing is cooled by the motor; 110. a motor cooling return air line; 111. a compressor suction line; 112. a regenerator return gas line; 113. a high pressure liquid storage tank balance pipe; 114. liquid balance tubes of the evaporator and the condenser; 200. a condensing pressure sensor; 201. an evaporation pressure sensor; 202. an air supply pressure sensor; 203. a return air pressure sensor; 204. a pressure sensor of the high-pressure liquid storage tank.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Embodiment 1, please refer to fig. 1-2, the present invention provides a technical solution: a centrifugal compressor and a refrigeration system of a refrigerant liquid lubrication bearing comprise a non-impeller end bearing 1, a motor rotor shaft 2, a motor stator 3, an impeller end bearing 4, a condenser 8, an evaporator 10, a high-pressure liquid storage tank 16, an air supply distribution pipeline 100 of a radial thrust bearing and a condensation pressure sensor 200, and are characterized in that the non-impeller end bearing 1, the motor rotor shaft 2, the motor stator 3 and the impeller end bearing 4 are all fixedly connected in a compressor main body 23, the motor rotor shaft 2 is positioned in the motor stator 3, the non-impeller end bearing 1 is positioned at the rear side of the motor rotor shaft 2, the impeller end bearing 4 is positioned at the front side of the motor rotor shaft 2, the air supply distribution pipeline 100 of the radial thrust bearing is fixedly connected between the non-impeller end bearing 1 and the impeller end bearing 4, a centrifugal compressor volute 6 is fixedly connected at the front end of the compressor main body 23, an impeller 5 is fixedly connected in the centrifugal compressor volute 6 and positioned at the front end of the impeller end bearing 4, a variable diffuser 7 is fixedly connected in the centrifugal compressor volute 6 and on the outer side of the impeller 5, a liquid pump 11 is fixedly connected between the outer side of the centrifugal compressor volute 6 and the condenser 8, a compressor suction pipeline 111 is fixedly connected at the middle position of the front end of the centrifugal compressor volute 6 and the evaporator 10, and a motor cooling return gas pipeline 110 is fixedly connected between the compressor suction pipeline 111 and the compressor main body 23.

The lower end of one side of the liquid level sensor switch 17 close to the evaporator 10 is fixedly connected with a liquid inlet 18 of a liquid storage tank heat regenerator and a gas outlet 19 of the liquid storage tank heat regenerator, a motor cooling liquid outlet bearing liquid outlet pipeline 109 is fixedly connected between the liquid inlet 18 of the liquid storage tank heat regenerator and a compressor main body 23, a heat regenerator return pipeline 112 is fixedly connected between the gas outlet 19 of the liquid storage tank heat regenerator and the evaporator 10, a medium pressure heat regenerator 20 is fixedly connected in the high pressure liquid storage tank 16, the lower end of one side of the high pressure liquid storage tank 16 far away from the liquid inlet 18 of the liquid storage tank heat regenerator is fixedly connected with a liquid level sensor switch 17, a liquid reservoir to bearing liquid supply main pipeline 107 is fixedly connected between the bottom of the high pressure liquid storage tank 16 and the compressor main body 23, one end of the condenser 8 far away from the compressor exhaust pipeline 101 is fixedly connected with a condenser outlet liquid phase pipeline 102, one end of the condenser outlet liquid phase pipeline 102 far away from the condenser 8 is fixedly connected to the evaporator liquid supply pipeline 103, evaporator liquid supply pipeline 103 one end fixed connection is on evaporimeter 10, evaporimeter liquid supply pipeline 103 keeps away from evaporimeter 10 one end fixedly connected with a liquid pump bypass pipeline 105, liquid pump bypass pipeline 105 keeps away from evaporimeter liquid supply pipeline 103 one end fixedly connected with a reservoir liquid supply pipeline 106, reservoir liquid supply pipeline 106 keeps away from liquid pump bypass pipeline 105 one end fixed connection is on high-pressure liquid storage pot 16, fixedly connected with a motor cooling liquid supply pipeline 108 on compressor main part 23, motor cooling liquid supply pipeline 108 keeps away from compressor main part 23 one end fixed evaporator liquid supply pipeline 103 and lies in between evaporimeter 10 and condenser export liquid phase pipeline 102, fixedly connected with a liquid pump pipeline 104 between liquid pump bypass pipeline 105 and reservoir liquid supply pipeline 106, fixedly connected with a liquid pump 11 on liquid pump pipeline 104, fixedly connected with a main throttle electronic expansion on evaporimeter liquid supply pipeline 103 and lie in between motor cooling liquid supply pipeline 108 and evaporimeter 10 The expansion valve 9, a pump-back liquid path check valve 12 is fixedly connected to one side of the liquid pump pipeline 104, which is far away from the liquid pump bypass pipeline 105, of the liquid pump 11, a bypass liquid path check valve 13 is fixedly connected to a joint of the liquid pump bypass pipeline 105 and the liquid reservoir liquid supply pipeline 106, a motor cooling throttling electronic expansion valve 14 is fixedly connected to one side of the motor cooling liquid supply pipeline 108, which is close to the compressor main body 23, an exhaust check valve 15 is fixedly connected to the compressor exhaust pipeline 101, an evaporation pressure sensor 201 is fixedly connected to the evaporator 10, a gas supply pressure sensor 202 is fixedly connected to one side of the liquid reservoir, which is close to the compressor main body 23, from the bearing liquid supply main pipeline 107, a condensation pressure sensor 200 is fixedly connected to the condenser 8, a return gas pressure sensor 203 is fixedly connected to the motor cooling return pipeline 110, and a high-pressure liquid reservoir pressure sensor 204 is fixedly connected to the high-pressure liquid reservoir 16.

Specifically, when the utility model is used, a small part of refrigerant liquid is led out from a condenser outlet liquid phase pipeline 102 at the outlet of a high-pressure condenser 8 of a refrigeration system, and enters a high-pressure liquid storage tank 16 through a liquid pump pipeline 104, most of the refrigerant liquid enters a main throttle electronic expansion valve 9 and an evaporator 10 from the outlet of the condenser 8 through an evaporator liquid supply pipeline 103, the refrigerant liquid is evaporated into refrigerant gas through the evaporator 10 in the evaporator 10 and returns to an air suction port of a compressor main body 23 through a compressor air suction pipeline 111 to complete refrigeration cycle, in the starting and stopping stage of the compressor, the liquid pump 11 is started to pressurize the liquid refrigerant liquid to high-pressure liquid which is about 0.2-0.7MPa higher than the liquid in the condenser to enter the high-pressure liquid storage tank 16, and then the high-pressure liquid storage tank 16 enters the compressor main body 23 through a liquid storage tank to bearing liquid supply main pipeline 107, the liquid pressurized liquid supply of the refrigerant is realized, after the compressor is started, and after the high-low pressure difference of a refrigeration system is established, the liquid pump 11 of the refrigerant pump is closed according to the detected system pressure difference, the refrigerant liquid enters the bearing for liquid supply through the bypass pipeline 105 of the liquid pump and the one-way valve 13 of the bypass pipeline, when the compressor is in normal operation, a stable liquid level is ensured by detecting the liquid level of the high-pressure liquid storage tank 16, when the compressor is stopped, the main throttle electronic expansion valve 9, the motor cooling throttle electronic expansion valve 14 and the variable diffuser mechanism 7 of the compressor are closed, in this way, the condenser 8 at the high-pressure side of the unit is isolated from the evaporator 10 at the low-pressure side, only the condenser 8 is left to pass through the one-way valve 13 of the bypass pipeline 105 of the bypass pipeline 13 and finally reach the evaporator 10 at the low-pressure side, and under the action of the pressure difference due to the high-low pressure difference between the condenser 8 and the evaporator 10, the liquid refrigerant flows from the condenser 8 to the high-pressure liquid storage tank 16, so that the refrigerant liquid in the high-pressure liquid storage tank 16 is enough to ensure that the bearing supplies liquid, the high-pressure liquid storage tank pressure sensor 204 is arranged, the pressure difference between the high-pressure liquid storage tank pressure sensor 204 and the return air pressure sensor 203 can be monitored to ensure whether the liquid supply pressure meets the pressure difference of 0.2MPa when the machine is shut down, when the pressure difference is less than the design requirement, the liquid pump 11 is started to achieve the purpose of uninterrupted liquid supply of the rolling bearing when the machine is shut down, the whole-course lubrication of the rolling bearing is realized, the damage is avoided, after the sudden power failure, the high-low pressure difference can only last for 15-20s, the high-low pressure can be balanced, the rotor of the permanent magnet motor is a permanent magnet, the sudden power failure occurs, the stator magnetic field disappears, the rotor magnetic field is equivalent to the reverse excitation braking effect, and the complete stop within 5-10s can be generally ensured, the liquid supply time is 15-20s, which can be longer than 5-10s, and the time from the rotation to the complete stop is also shown, but only in the case of adopting a permanent magnet motor, the bearing lubrication can be ensured, and the design of a liquid storage tank can meet the requirement.

Embodiment 2, please refer to fig. 3-4, the present invention provides a technical solution: a centrifugal compressor and a refrigeration system of a refrigerant liquid lubrication bearing.

According to embodiment 1, the position of the liquid taking port of the liquid pump 11 is set at the lower end of the evaporator 10, the liquid inlet of the corresponding liquid pump pipeline 104 is changed from the outlet of the condenser 8, the condenser outlet liquid phase pipeline 102, to the bottom pipe port of the evaporator 10, at the same time, the top of the high pressure liquid storage tank 16 is provided with the high pressure liquid storage tank balance pipe 113 connected with the gas phase space at the top of the condenser 8, and the second electromagnetic valve 22 is installed, at the same time, for the evaporator 10, the condenser outlet liquid phase pipeline 102 of the outlet liquid of the condenser 8 is connected with the bottom of the evaporator 10 through the evaporator and condenser liquid balance pipes 114, and the motor cooling throttling electronic expansion valve 14 is provided with the first electromagnetic valve 21, before the compressor is started, the second electromagnetic valve 22 on the high pressure liquid storage tank balance pipe 113 is electrified to conduct the evaporator 10s, and the pressures of the condenser 8 and the high pressure liquid storage tank 16 are balanced to the same pressure, then the power is cut off to close the second electromagnetic valve 22, then the first electromagnetic valve 21 on the liquid balance pipe 114 of the evaporator and the condenser is electrified to conduct the evaporator 10 for about 10s, part of the refrigerant in the condenser 8 is discharged into the evaporator 10, and enough refrigerant liquid is ensured in the evaporator 10 before the liquid pump 11 is operated, which is suitable for the situation that the refrigerant in the evaporator 10 can migrate into the condenser 8 during the shutdown process and no liquid level exists in the evaporator 10, then the power is cut off to close the first electromagnetic valve 21, and the liquid pump 11 is started, so that the refrigerant liquid in the evaporator 10 is discharged into the high-pressure liquid storage tank 16 through the liquid pump pipeline 104, the post-pump liquid circuit check valve 12 and the liquid storage tank supply pipeline 106 after being pressurized by 0.5MPa, and when the liquid level of the high-pressure liquid storage tank 16 is greater than or equal to 90%, the high-pressure liquid storage tank pressure sensor 204 and the return air pressure sensor 203 are simultaneously monitored, if the minimum liquid supply pressure difference of 0.2Mpa is met and the compressor is continuously stable for 30s, the compressor is started, in the starting process, the liquid pump 11 keeps running until the pressure difference of the refrigeration systems of the condensation pressure sensor 200 and the evaporation pressure sensor 201 is greater than 0.2MPa, the liquid pump 11 can be stopped, the evaporator 10 is adopted to directly supply liquid to the bearing, the purpose that the liquid supply of the rolling bearing is uninterrupted when the compressor is started or stopped is achieved, the whole-process lubrication of the rolling bearing is realized, and the damage is avoided.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", "third", "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", "fourth" may explicitly or implicitly include at least one such feature.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A centrifugal compressor and a refrigeration system of a refrigerant liquid lubrication bearing are characterized by comprising a non-impeller end bearing (1), a motor rotor shaft (2), a motor stator (3), an impeller end bearing (4), a condenser (8), an evaporator (10), a high-pressure liquid storage tank (16), an air supply distribution pipeline (100) of a radial thrust bearing and a condensation pressure sensor (200), wherein the non-impeller end bearing (1), the motor rotor shaft (2), the motor stator (3) and the impeller end bearing (4) are fixedly connected in a compressor main body (23), the motor rotor shaft (2) is positioned in the motor stator (3), the non-impeller end bearing (1) is positioned at the rear side of the motor rotor shaft (2), the impeller end bearing (4) is positioned at the front side of the motor rotor shaft (2), the air supply distribution pipeline (100) of the radial thrust bearing is fixedly connected between the non-impeller end bearing (1) and the impeller end bearing (4), the centrifugal compressor volute (6) is fixedly connected with the front end of the compressor body (23), an impeller (5) is arranged in the centrifugal compressor volute (6) and is located at the front end of an impeller end bearing (4), a variable diffuser (7) is fixedly connected with the outer side of the impeller (5) in the centrifugal compressor volute (6), a liquid pump (11) is fixedly connected between the outer side of the centrifugal compressor volute (6) and the condenser (8), a compressor suction pipeline (111) is fixedly connected with the middle position of the front end of the evaporator (10) and the centrifugal compressor volute (6), and a motor cooling return air pipeline (110) is fixedly connected between the compressor suction pipeline (111) and the compressor body (23).

2. A refrigerant liquid lubricated bearing centrifugal compressor and refrigeration system as claimed in claim 1 wherein: the lower end of one side of the liquid level sensor switch (17) close to the evaporator (10) is fixedly connected with a liquid inlet (18) of the liquid storage tank heat regenerator and a gas outlet (19) of the liquid storage tank heat regenerator, a motor cooling liquid outlet bearing liquid outlet pipeline (109) is fixedly connected between the liquid inlet (18) of the liquid storage tank heat regenerator and the compressor main body (23), a regenerator return air pipeline (112) is fixedly connected between the air outlet (19) of the liquid storage tank regenerator and the evaporator (10), a medium-pressure heat regenerator (20) is fixedly connected in the high-pressure liquid storage tank (16), the lower end of one side of the high-pressure liquid storage tank (16) far away from a liquid inlet (18) of a heat regenerator of the liquid storage tank is fixedly connected with a liquid level sensor switch (17), a liquid storage device is fixedly connected between the bottom of the high-pressure liquid storage tank (16) and the compressor main body (23) to a bearing liquid supply main pipeline (107).

3. A refrigerant liquid lubricated bearing centrifugal compressor and refrigeration system as claimed in claim 1 wherein: the condenser (8) is far away from one end of the compressor exhaust pipeline (101) and is fixedly connected with a condenser outlet liquid phase pipeline (102), one end of the condenser outlet liquid phase pipeline (102) far away from the condenser (8) is fixedly connected onto the evaporator liquid supply pipeline (103), one end of the evaporator liquid supply pipeline (103) is fixedly connected onto the evaporator (10), one end of the evaporator liquid supply pipeline (103) far away from the evaporator (10) is fixedly connected with a liquid pump bypass pipeline (105), one end of the liquid pump bypass pipeline (105) far away from the evaporator liquid supply pipeline (103) is fixedly connected with a liquid reservoir liquid supply pipeline (106), one end of the liquid reservoir liquid supply pipeline (106) far away from the liquid pump bypass pipeline (105) is fixedly connected onto the high-pressure liquid storage tank (16), and the compressor body (23) is fixedly connected with a motor cooling liquid supply pipeline (108), the motor cooling liquid supply pipeline (108) is far away from the fixed evaporator liquid supply pipeline (103) at one end of the compressor main body (23) and is located between the evaporator (10) and the condenser outlet liquid phase pipeline (102), a liquid pump pipeline (104) is fixedly connected between the liquid pump bypass pipeline (105) and the liquid storage device liquid supply pipeline (106), and a liquid pump (11) is fixedly connected onto the liquid pump pipeline (104).

4. A refrigerant liquid lubricated bearing centrifugal compressor and refrigeration system as claimed in claim 1 wherein: on evaporimeter liquid supply pipe way (103) and be located fixedly connected with one main throttle electronic expansion valve (9) between motor cooling liquid supply pipe way (108) and evaporimeter (10), liquid pump pipeline (104) are gone up and are located liquid pump (11) and keep away from liquid pump bypass pipeline (105) one side fixedly connected with one pump back liquid way check valve (12), liquid pump bypass pipeline (105) and reservoir liquid supply pipe way (106) junction fixedly connected with one bypass liquid way check valve (13), motor cooling liquid supply pipe way (108) are close to compressor main part (23) one side fixedly connected with one motor cooling throttle electronic expansion valve (14), and compressor exhaust pipe way (101) are gone up fixedly connected with one exhaust check valve (15).

5. A refrigerant liquid lubricated bearing centrifugal compressor and refrigeration system as claimed in claim 1 wherein: evaporating pressure sensor (201) of fixedly connected with on evaporimeter (10), reservoir to bearing supply liquid main line (107) go up and be located and be close to compressor main part (23) one side fixedly connected with air feed pressure sensor (202), condensing pressure sensor (200) of fixedly connected with on condenser (8), return air pressure sensor (203) of fixedly connected with on motor cooling return air pipeline (110), high-pressure liquid storage pot pressure sensor (204) of fixedly connected with on high-pressure liquid storage pot (16).