CN211777905U

CN211777905U - Compressor oil supply system

Info

Publication number: CN211777905U
Application number: CN202020345077.3U
Authority: CN
Inventors: 王世宇; 林忠华; 任宝顺
Original assignee: Beijing Jingcheng Compressor Co ltd
Current assignee: Beijing Jingcheng Compressor Co ltd
Priority date: 2020-03-18
Filing date: 2020-03-18
Publication date: 2020-10-27
Anticipated expiration: 2030-03-18

Abstract

The utility model discloses a compressor oil feeding system, including electric heater and temperature transmitter, first two three-way valve, two-way pump, first ball valve, overflow valve, two three-way valves of second, first two three-way head respectively with the crankcase with the two-way pump intercommunication, the two-way pump respectively with first ball valve with the crankcase can open and close formula intercommunication, the overflow valve with the crankcase with first ball valve with two three-way valve intercommunication of second, two three-way valves of second with two-way pump intercommunication and cylinder body subassembly or transmission system intercommunication, temperature transmitter's both ends respectively with crankcase and teletransmission display intercommunication. The utility model discloses a compressor oil feeding system simple structure, lubricating oil heating are balanced in the crankcase, avoid electric heater carbon deposit, reduce electric heater's damage frequency and realize circulation heating lubricating oil.

Description

Compressor oil supply system

Technical Field

The utility model relates to an oil pump technical field especially relates to a compressor oil feeding system.

Background

With the development of aerospace, nuclear power, petrochemical and gas industries at home and abroad, a large amount of compressor equipment is needed. In winter, particularly in some northern areas, the temperature is relatively low, the viscosity of the lubricating oil in the crankcase is increased, so that the fluidity of the lubricating oil is weak, and in order to ensure the normal operation of the compressor, the lubricating oil needs to be heated to a certain temperature as shown in fig. 1, so as to control the fluidity of the lubricating oil. The compressor can only be started when the oil temperature reaches the required value. However, because the crankcase body is large, the heating temperature of the electric heater is unbalanced, the temperature of lubricating oil close to the electric heater is high, the temperature of lubricating oil far away from the electric heater is low, and the temperature measuring element is far away from the electric heater, so that the measured temperature of the lubricating oil is inaccurate.

Disclosure of Invention

The utility model relates to a solve not enough among the prior art and accomplish, the utility model aims at providing a compressor oil feeding system of balanced, avoid electric heater carbon deposit, reduction electric heater's damage frequency and realization circulation heating lubricating oil of lubricating oil heating in simple structure, the crankcase.

The utility model discloses a compressor oil supply system, including electric heater and the temperature transmitter that sets up in the crankcase, the first two-position three-way valve that sets gradually from front to back, the bidirectional pump with motor, first ball valve, overflow valve, the second two-position three-way valve, first two-position three-way valve and the second two-position three-way valve all are provided with the first logical head that is located upper portion, the second logical head that is located lower portion left side and the third logical head that is located lower portion right side, the second logical head and the third logical head of first two-position three-way valve communicate with the crankcase respectively, the first logical head of first two-position three-way valve with the bidirectional pump intercommunication, the rear end of bidirectional pump respectively with the front end of first ball valve with the crankcase can open and close formula intercommunication, the front end of overflow valve with the rear end of first ball valve can open and close formula intercommunication, the overflow valve with the crankcase intercommunication, the rear end of overflow valve with the third logical head intercommunication of two three-way valves of second, the second logical head of two three-way valves of second with the rear end intercommunication of bidirectional pump, the first logical head and cylinder body subassembly or transmission system intercommunication of two three-way valves of second, temperature transmitter's one end with the crankcase is connected, temperature transmitter's the other end and teletransmission display are connected.

The utility model discloses a compressor oil feeding system can also be:

and a second ball valve is arranged between the rear end of the bidirectional pump and the crankcase, and the bidirectional pump and the crankcase can be communicated in an open-close mode through the second ball valve.

The rear end of two-way pump with the front end junction of first ball valve is provided with the four-way pipe, the front end of four-way pipe with the rear end intercommunication of two-way pump, the rear end of four-way pipe with the front end of first ball valve can open and close formula intercommunication, the left end of four-way pipe with the second of two three-way valves of second is led to the first intercommunication, the right-hand member of four-way pipe with the crankcase can open and close formula intercommunication.

The first lead to of two three-way valves of second lead to the head with cylinder body subassembly intercommunication just is provided with first oil circuit, first oil circuit and hydraulic pump intercommunication.

The front end and the rear end of the hydraulic pump are respectively provided with a first one-way valve and a second one-way valve, the front end of the first one-way valve is communicated with a first through head of the second two-position three-way valve, and the rear end of the second one-way valve is communicated with the cylinder body assembly.

The first head that leads to of two three-way valves of second with be provided with the second oil circuit between the cylinder body subassembly, be provided with the stop valve on the second oil circuit, the first head that leads to of two three-way valves of second with the cylinder body subassembly passes through but stop valve formula intercommunication of opening and close.

And a third one-way valve is arranged between the first through head of the second two-position three-way valve and the transmission system, and the second two-position three-way valve, the third one-way valve and the transmission system are sequentially communicated from front to back.

A coarse filter is arranged between a third through head of the first two-position three-way valve and the crankcase, the front end of the coarse filter is communicated with the crankcase, and the rear end of the coarse filter is communicated with the third through head of the first two-position three-way valve.

A cooler is arranged between the overflow valve and the first ball valve, the front end of the cooler is communicated with the first ball valve, and the rear end of the cooler is communicated with the overflow valve.

The overflow valve with be provided with the smart filter between the third logical head of two three-way valves of second, the front end of smart filter with the overflow valve intercommunication, the rear end of smart filter with the third logical head intercommunication of two three-way valves of second.

The utility model discloses a compressor oil supply system, including electric heater and the temperature transmitter that sets up in the crankcase, the first two-position three-way valve that sets gradually from front to back, the bidirectional pump with motor, first ball valve, overflow valve, the second two-position three-way valve, first two-position three-way valve and the second two-position three-way valve all are provided with the first logical head that is located upper portion, the second logical head that is located lower portion left side and the third logical head that is located lower portion right side, the second logical head and the third logical head of first two-position three-way valve communicate with the crankcase respectively, the first logical head of first two-position three-way valve with the bidirectional pump intercommunication, the rear end of bidirectional pump respectively with the front end of first ball valve with the crankcase can open and close formula intercommunication, the front end of overflow valve with the rear end of first ball valve can open and close formula intercommunication, the overflow valve with the crankcase intercommunication, the rear end of overflow valve with the third logical head intercommunication of two three-way valves of second, the second logical head of two three-way valves of second with the rear end intercommunication of bidirectional pump, the first logical head and cylinder body subassembly or transmission system intercommunication of two three-way valves of second, temperature transmitter's one end with the crankcase is connected, temperature transmitter's the other end and teletransmission display are connected. In this way, before starting the compressor, the first ball valve is closed, the bidirectional pump and the crankcase are communicated, then the bidirectional pump is started, the lubricating oil circulates between the crankcase and the bidirectional pump, the electric heater is arranged in the crankcase, and the better effect is that the electric heater is arranged close to a port where the lubricating oil enters the bidirectional pump, so the lubricating oil heated by the electric heater flows to the bidirectional pump and then flows back to the crankcase from the bidirectional pump through the communication between the rear end of the bidirectional pump and the crankcase, in the process, the lubricating oil in the crankcase on the side far away from the electric heater flows to the electric heater and is heated by the electric heater to continue to enter the bidirectional pump, and the circulation enables the temperature of the lubricating oil to reach a preset value in an equalizing mode. When the temperature of the lubricating oil measured by the temperature transmitter reaches a preset value of the working of the compressor, the lubricating oil is displayed through the remote display, then the communication between the rear end of the bidirectional pump and the crankcase is manually closed, the first ball valve and the compressor are opened, the lubricating oil flows to the first ball valve from the rear end of the bidirectional pump and then flows into the overflow valve from the first ball valve, when the oil pressure exceeds the preset value, redundant lubricating oil flows back into the crankcase from the overflow valve, the lubricating oil flows in from a third through head of the second two-position three-way valve after passing through the overflow valve under normal conditions, the first through head of the second two-position three-way valve flows out and enters the cylinder body assembly or the transmission system, and at the moment, the first through head of the second two-position three-way valve is in a normal working position. If the oil supply system needs to be disassembled and repaired or daily maintained, the lubricating oil in the oil supply system needs to be subjected to oil return treatment, at the moment, a first through head of the first two-position three-way valve and a first through head of the second two-position three-way valve are both arranged at oil return working positions, a second through head of the first two-position three-way valve is communicated with the crankcase in an openable and closable manner, a second through head of the second two-position three-way valve is communicated with the rear end of the two-way pump, the two-way pump is started, the lubricating oil left in the cylinder body assembly and the transmission system sequentially passes through the second two-position three-way valve, the two-way pump and the first two-position three-way valve and returns to the crankcase, then, parts of the oil supply system are disassembled and repaired, and the lubricating oil is prevented from being disassembled and leaked to. The utility model discloses a compressor oil feeding system, the advantage for prior art is: simple structure, lubricating oil heating in the crankcase are balanced, avoid electric heater carbon deposit, reduce electric heater's damage frequency and realize the circulation heating lubricating oil.

Drawings

Fig. 1 is a schematic diagram of an oil supply system of a compressor in the prior art.

Fig. 2 the utility model relates to a compressor oil feeding system structure sketch map.

Description of the figures

1 … electric heater 2 … crankcase 3 … cylinder assembly

4 … Transmission System 5 … second check valve 6 … Hydraulic Pump

7 … first check valve 8 … stop valve 9 … third check valve

10 … second two-position three-way valve 11 … fine filter 12 … overflow valve

13 … cooler 14 … first ball valve 15 … second ball valve

16 … bidirectional pump 17 … temperature transmitter 18 … remote display

19 … first two-position three-way valve 20 … coarse filter

Detailed Description

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "vertical", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The oil supply system for compressor according to the present invention will be described in detail with reference to fig. 2 of the drawings.

The utility model relates to a compressor oil supply system, please refer to fig. 2, including electric heater 1 and temperature transmitter 17 arranged in crankcase 2, first two-position three-way valve 19, bidirectional pump 16 with motor, first ball valve 14, overflow valve 12, second two-position three-way valve 10 set gradually from front to back, first two-position three-way valve 19 and second two-position three-way valve 10 are all provided with the first through head located at the upper portion, the second through head located at the left side of the lower portion and the third through head located at the right side of the lower portion, the second through head and the third through head of first two-position three-way valve 19 are respectively communicated with crankcase 2, the first through head of first two-position three-way valve 19 is communicated with bidirectional pump 16, the rear end of bidirectional pump 16 is respectively communicated with the front end of first ball valve 14 and the crankcase 2 can be opened and closed, the front end of overflow valve 12 is communicated with the rear end of first ball valve 14, the overflow valve 12 with 2 intercommunications of crankcase, the rear end of overflow valve 12 with the third logical head intercommunication of two three-way valves 10 of second, two three-way valves 10 of second the second head with the rear end intercommunication of bidirectional pump 16, two three-way valves 10 of second first lead to the head and cylinder body subassembly 3 or transmission system 4 intercommunication, temperature transmitter 17's one end with 2 connections of crankcase, temperature transmitter 17's the other end and teletransmission display 18 are connected. Thus, before starting the compressor, the first ball valve 14 is closed, the bi-directional pump 16 and the crankcase 2 are opened to communicate, the bi-directional pump 16 is then switched on, and oil circulates between the crankcase 2 and the bi-directional pump 16, the electric heater 1 is disposed inside the crankcase 2, and more advantageously, the electric heater 1 is disposed near a port where lubricating oil enters the bidirectional pump 16, so that the lubricating oil heated by the electric heater 1 flows to the bidirectional pump 16, and then flows from the bi-directional pump 16 back to the crankcase 2, through the communication of the rear end of the bi-directional pump 16 with the crankcase 2, during which, the lubricating oil in the crankcase 2 at the side far away from the electric heater 1 flows to the electric heater 1, is heated by the electric heater 1 and continues to enter the bidirectional pump 16, and the circulation enables the temperature of the lubricating oil to reach a preset value in an equalizing way. When the temperature of the lubricating oil measured by the temperature transmitter 17 reaches a preset value of the work of the compressor, the lubricating oil is displayed through the remote display 18, then the communication between the rear end of the bidirectional pump 16 and the crankcase 2 is manually closed, the first ball valve 14 and the compressor are opened, the lubricating oil flows to the first ball valve 14 from the rear end of the bidirectional pump 16 and then flows into the overflow valve 12 from the first ball valve 14, when the oil pressure exceeds the preset value, the redundant lubricating oil flows back to the crankcase 2 from the overflow valve 12, the lubricating oil flows in from the third through head of the second two-position three-way valve 10 after passing through the overflow valve 12 under normal conditions, the first through head of the second two-position three-way valve flows out to enter the cylinder body assembly 3 or the transmission system 4, and at this time, the first through head of the second two-position three-way valve 10 is in a normal working position. If the oil supply system needs to be disassembled and repaired or daily maintained, the lubricating oil in the oil supply system needs to be subjected to oil return treatment, at this time, the first through head of the first two-position three-way valve 19 and the first through head of the second two-position three-way valve 10 are both set to oil return working positions, the second through head of the first two-position three-way valve 19 is communicated with the crankcase 2 in an openable and closable manner, the second head of the second two-position three-way valve 10 is communicated with the rear end of the two-way pump 16, the two-way pump 16 is started, the lubricating oil remained in the cylinder block assembly 3 and the transmission system 4 returns to the crankcase 2 through the second two-position three-way valve 10, the two-way pump 16 and the first two-position three-way valve 19 in sequence, then, parts of the oil supply system are disassembled and maintained, so that danger caused by leakage of lubricating oil after disassembly is avoided. The utility model discloses a compressor oil feeding system, the advantage for prior art is: simple structure, lubricating oil heating in the crankcase 2 are balanced, avoid electric heater 1 carbon deposit, reduce electric heater 1's damage frequency and realize the circulation heating lubricating oil.

The utility model discloses a compressor oil feeding system please refer to fig. 2, can also be on the basis of preceding technical scheme: a second ball valve 15 is arranged between the rear end of the bidirectional pump 16 and the crankcase 2, and the bidirectional pump 16 and the crankcase 2 can be communicated in an open-close mode through the second ball valve 15. Thus, the rear end of the bidirectional pump 16 is controlled to open or close the communication state with the crankcase 2 through the second ball valve 15, when the lubricating oil in the crankcase 2 needs to be circularly heated, the second ball valve 15 is opened, the first ball valve 14 is closed, after the bidirectional pump 16 is opened, the lubricating oil in the crankcase 2 close to the electric heater 1 is heated, then enters the two-way pump 16 through the first two-position three-way valve 19, then enters the end of the crankcase 2 far away from the electric heater 1 through the second ball valve 15, in the process, the lubricating oil at the end of the crankcase 2 far away from the electric heater 1 flows to the vicinity of the electric heater 1, and thus circularly flows through the uniform heating of the electric heater 1, the time for raising the temperature of the lubricating oil can be reduced, and the compressor can be enabled to enter a working state earlier. When the compressor enters a working state, the second ball valve 15 is closed, the first ball valve 14 is opened, and at the moment, the lubricating oil sequentially passes through the first two-position three-way valve 19, the first ball valve 14, the overflow valve 12 and the second two-position three-way valve 10 and finally enters the cylinder body assembly 3 or the transmission system 4.

The utility model discloses a compressor oil feeding system please refer to fig. 2, can also be on the basis of preceding technical scheme: the rear end of the two-way pump 16 with the front end junction of first ball valve 14 is provided with the four-way pipe, the front end of four-way pipe with the rear end intercommunication of two-way pump 16, the rear end of four-way pipe with the front end of first ball valve 14 can open and close formula intercommunication, the left end of four-way pipe with the second lead of two three-way valves 10 of second intercommunication, the right-hand member of four-way pipe with but crankcase 2 open and close formula intercommunication. In this way, a further preferred embodiment is that the second ball valve 15 is disposed between the right end of the four-way pipe and the crankcase 2. Thus, when the lubricating oil in the crankcase 2 is heated circularly, the second ball valve 15 is opened, the first ball valve 14 is closed, and the four-way pipe is arranged to enable the lubricating oil to return to the working condition in the crankcase 2 from the two-way pump 16 through the second ball valve 15. When the lubricating oil in the crankcase 2 reaches the preset value of normal operation of the compressor, the first ball valve 14 is opened, the second ball valve 15 is closed, at the moment, the lubricating oil enters the first ball valve 14 through the rear end of the two-way pump 16 and then enters the overflow valve 12, and the four-way pipe also meets the working condition of an oil supply system when the compressor normally operates. When reverse oil pumping treatment is to be carried out, the second ball valve 15 is in a closed position, lubricating oil enters the two-way pump 16 through the second head of the second two-position three-way valve 10 and then returns to the inside of the crankcase 2, the four-way pipe further meets the working conditions during reverse oil pumping, and under the condition that the working conditions are met, the space required by an oil supply system is greatly saved due to the arrangement of the four-way pipe.

The utility model discloses a compressor oil feeding system please refer to fig. 2, can also be on the basis of preceding technical scheme: the first lead to of two three-way valves 10 of second with cylinder body subassembly 3 intercommunication just is provided with first oil circuit, first oil circuit and hydraulic pump 6 intercommunication. Thus, when the pressure of the lubricating oil reaches the opening value of the hydraulic pump 6, the hydraulic pump 6 is started to make the lubricating oil enter the cylinder block assembly 3. According to a further preferable technical scheme, a first one-way valve 7 and a second one-way valve 5 are respectively arranged at the front end and the rear end of the hydraulic pump 6, the front end of the first one-way valve 7 is communicated with a first through head of the second two-position three-way valve 10, and the rear end of the second one-way valve 5 is communicated with the cylinder body assembly 3. Like this, first check valve 7 can prevent that lubricating oil from flowing backwards extremely 10 position departments of second two three-way valves make the oil pressure of 6 position departments of hydraulic pump is not enough, and then can't start hydraulic pump 6, second check valve 5 can prevent that lubricating oil from flowing backwards into hydraulic pump 6, and then increase the damage frequency of hydraulic pump 6 in normal work, because hydraulic pump 6 can only unidirectional rotation, can not change the direction of rotation at will, if lubricating oil backward gets into hydraulic pump 6, must make hydraulic pump 6 antiport, and then cause hydraulic pump 6's damage.

The utility model discloses a compressor oil feeding system please refer to fig. 2, can also be on the basis of preceding technical scheme: the first head that leads to of two three-way valves 10 of second with be provided with the second oil circuit between the cylinder body subassembly 3, be provided with stop valve 8 on the second oil circuit, the first head that leads to of two three-way valves 10 of second with cylinder body subassembly 3 passes through stop valve 8 can open and shut formula intercommunication. In this way, when the reverse oil pumping is performed, the stop valve 8 is manually opened, the first through head of the first two-position three-way valve 19 and the first through head of the second two-position three-way valve 10 are switched to the oil return working position, so that the first through head and the second through head of the first two-position three-way valve 19 are connected to the oil path, the first through head and the second through head of the second two-position three-way valve 10 are connected to the oil path, the second through head of the first two-position three-way valve 19 is connected to the crankcase 2, the second through head of the second two-position three-way valve 10 is connected to the bidirectional pump 16, and the bidirectional pump 16 drives the lubricating oil remaining in the cylinder assembly 3 to flow from the cylinder assembly 3 to the second two-position three-way valve 10 through the stop valve 8. Of course, the stop valve 8 may be replaced by a ball valve as long as the second oil path is in an open or closed state.

The utility model discloses a compressor oil feeding system please refer to fig. 2, can also be on the basis of preceding technical scheme: and a third one-way valve 9 is arranged between a first through head of the second two-position three-way valve 10 and the transmission system 4, and the second two-position three-way valve 10, the third one-way valve 9 and the transmission system 4 are sequentially communicated from front to back. In this way, the third check valve 9 stabilizes the oil pressure of the lubricating oil entering the transmission system 4 and also prevents excessive air from entering the lubricating oil flowing back to the crankcase 2 during reverse pumping.

The utility model discloses a compressor oil feeding system please refer to fig. 2, can also be on the basis of preceding technical scheme: a coarse filter 20 is arranged between a third through head of the first two-position three-way valve 19 and the crankcase 2, the front end of the coarse filter 20 is communicated with the crankcase 2, and the rear end of the coarse filter 20 is communicated with the third through head of the first two-position three-way valve 19. In this way, a coarse filter 20 is provided between the third head of the first two-position three-way valve 19 and the crankcase 2, the front end of the coarse filter 20 communicates with the crankcase 2, and the rear end of the coarse filter 20 communicates with the first two-position three-way valve 19. Thus, when the lubricant oil passes through the coarse filter 20, the filter cartridge with a certain size of filter screen in the coarse filter 20 blocks impurities larger than 80 μm in the lubricant oil, and the lubricant oil after coarse filtration is discharged from the outlet of the coarse filter 20, enters the first two-position three-way valve 19, and then enters the two-way pump 16, so that the normal operation of the two-way pump 16 can be protected. When cleaning is needed, the removable filter cartridge on the coarse filter 20 is only required to be taken out and then installed again after treatment, so that the coarse filter 20 is very convenient to use and maintain.

The utility model discloses a compressor oil feeding system please refer to fig. 2, can also be on the basis of preceding technical scheme: a cooler 13 is arranged between the overflow valve 12 and the first ball valve 14, the front end of the cooler 13 is communicated with the first ball valve 14, and the rear end of the cooler 13 is communicated with the overflow valve 12. In this way, the temperature of the lubricating oil rises as it passes through the bidirectional pump 16, and therefore the viscosity of the lubricating oil also becomes thinner as the temperature rises, reducing the lubricating ability, the cooler 13 cools the lubricating oil passing therethrough, controlling the temperature of the lubricating oil within a normal operating range, and ensuring that the lubricating oil finally entering the cylinder block assembly 3 and the transmission system 4 maintains a certain viscosity.

The utility model discloses a compressor oil feeding system please refer to fig. 2, can also be on the basis of preceding technical scheme: the overflow valve 12 with be provided with smart filter 11 between the third logical head of second two three-way valve 10, the front end of smart filter 11 with overflow valve 12 communicates, the rear end of smart filter 11 with the third logical head of second two three-way valve 10 communicates. Therefore, when the lubricating oil passes through the fine filter 11, the filter cartridge with a filter screen with a certain specification in the fine filter 11 blocks impurities larger than 20 μm in the lubricating oil, and the lubricating oil after fine filtration is discharged from the outlet of the fine filter 11, enters the second two-position three-way valve 10, enters the transmission system 4 and the cylinder assembly 31, so that the normal operation of the transmission system 4 and the cylinder assembly 3 can be protected. When the fine filter 11 needs to be cleaned, the detachable filter cartridge on the fine filter 11 is taken out and is installed again after being treated, so that the fine filter 11 is very convenient to use and maintain.

The above description is only for the description of several embodiments of the present invention, but the scope of the present invention should not be considered as falling within the scope of the present invention, in which all the equivalent changes or modifications or the equal-scale enlargement or reduction etc. according to the design spirit of the present invention are made.

Claims

1. A compressor oil feeding system is characterized in that: the electric heater and the temperature transmitter are arranged in a crankcase, the first two-position three-way valve, the two-way pump with the motor, the first ball valve, the overflow valve and the second two-position three-way valve are sequentially arranged from front to back, the first two-position three-way valve and the second two-position three-way valve are respectively provided with a first through head positioned at the upper part, a second through head positioned at the left side of the lower part and a third through head positioned at the right side of the lower part, the second through head and the third through head of the first two-position three-way valve are respectively communicated with the crankcase, the first through head of the first two-position three-way valve is communicated with the two-way pump, the rear end of the two-way pump is respectively communicated with the front end of the first ball valve and the crankcase, the front end of the overflow valve is communicated with the rear end of the first ball valve in an openable mode, the overflow valve is communicated with the crankcase, and the rear end of the overflow valve, the second of the two three-way valves of second leads to the head with the rear end intercommunication of bidirectional pump, the first head that leads to of the two three-way valves of second leads to head and cylinder body subassembly or transmission system intercommunication, temperature transmitter's one end with the crankcase is connected, temperature transmitter's the other end and teletransmission display are connected.

2. The oil supply system for a compressor as claimed in claim 1, wherein: and a second ball valve is arranged between the rear end of the bidirectional pump and the crankcase, and the bidirectional pump and the crankcase can be communicated in an open-close mode through the second ball valve.

3. The oil supply system for a compressor as claimed in claim 1, wherein: the rear end of two-way pump with the front end junction of first ball valve is provided with the four-way pipe, the front end of four-way pipe with the rear end intercommunication of two-way pump, the rear end of four-way pipe with the front end of first ball valve can open and close formula intercommunication, the left end of four-way pipe with the second of two three-way valves of second is led to the first intercommunication, the right-hand member of four-way pipe with the crankcase can open and close formula intercommunication.

4. A compressor oil supply system according to any one of claims 1 to 3, wherein: the first lead to of two three-way valves of second lead to the head with cylinder body subassembly intercommunication just is provided with first oil circuit, first oil circuit and hydraulic pump intercommunication.

5. The compressor oil supply system according to claim 4, wherein: the front end and the rear end of the hydraulic pump are respectively provided with a first one-way valve and a second one-way valve, the front end of the first one-way valve is communicated with a first through head of the second two-position three-way valve, and the rear end of the second one-way valve is communicated with the cylinder body assembly.

6. A compressor oil supply system according to any one of claims 1 to 3, wherein: the first head that leads to of two three-way valves of second with be provided with the second oil circuit between the cylinder body subassembly, be provided with the stop valve on the second oil circuit, the first head that leads to of two three-way valves of second with the cylinder body subassembly passes through but stop valve formula intercommunication of opening and close.

7. A compressor oil supply system according to any one of claims 1 to 3, wherein: and a third one-way valve is arranged between the first through head of the second two-position three-way valve and the transmission system, and the second two-position three-way valve, the third one-way valve and the transmission system are sequentially communicated from front to back.

8. A compressor oil supply system according to any one of claims 1 to 3, wherein: a coarse filter is arranged between a third through head of the first two-position three-way valve and the crankcase, the front end of the coarse filter is communicated with the crankcase, and the rear end of the coarse filter is communicated with the third through head of the first two-position three-way valve.

9. A compressor oil supply system according to any one of claims 1 to 3, wherein: a cooler is arranged between the overflow valve and the first ball valve, the front end of the cooler is communicated with the first ball valve, and the rear end of the cooler is communicated with the overflow valve.

10. A compressor oil supply system according to any one of claims 1 to 3, wherein: the overflow valve with be provided with the smart filter between the third logical head of two three-way valves of second, the front end of smart filter with the overflow valve intercommunication, the rear end of smart filter with the third logical head intercommunication of two three-way valves of second.