CN116677606B - Double-screw two-stage compression self-adaptive oil injection device - Google Patents
Double-screw two-stage compression self-adaptive oil injection device Download PDFInfo
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- CN116677606B CN116677606B CN202310969762.1A CN202310969762A CN116677606B CN 116677606 B CN116677606 B CN 116677606B CN 202310969762 A CN202310969762 A CN 202310969762A CN 116677606 B CN116677606 B CN 116677606B
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- 230000006835 compression Effects 0.000 title claims abstract description 118
- 238000007906 compression Methods 0.000 title claims abstract description 118
- 238000002347 injection Methods 0.000 title claims abstract description 35
- 239000007924 injection Substances 0.000 title claims abstract description 35
- 238000001816 cooling Methods 0.000 claims abstract description 14
- 230000008859 change Effects 0.000 claims abstract description 4
- 238000012545 processing Methods 0.000 claims description 22
- 239000003507 refrigerant Substances 0.000 claims description 12
- 230000003044 adaptive effect Effects 0.000 claims description 7
- 239000003921 oil Substances 0.000 abstract description 94
- 239000010687 lubricating oil Substances 0.000 abstract description 17
- 230000009347 mechanical transmission Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
- F04C29/021—Control systems for the circulation of the lubricant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/28—Safety arrangements; Monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/04—Heating; Cooling; Heat insulation
- F04C29/042—Heating; Cooling; Heat insulation by injecting a fluid
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The application discloses a double-screw two-stage compression self-adaptive oil injection device, which comprises two compression stages, a first compression stage and a second compression stage; one end of the first compression stage is connected with an air inlet pipe, the other end of the first compression stage is connected with an air outlet pipe of the first compression stage, and the other end of the air outlet pipe of the first compression stage is connected with the second compression stage; the oil inlet pipe of the first stage and the oil inlet pipe of the second stage are controlled by the control system through data of the flow and the pressure sensor. The oil quantity of the application is changed along with the change of the output power of the first compression stage and the second compression stage, so that the application can provide accurate cooling and lubricating oil quantity for the two-stage compressor, improve the service efficiency of lubricating oil and reduce the loss of mechanical transmission efficiency.
Description
Technical Field
The application relates to a double-screw compression oil injection device, in particular to a double-screw two-stage compression self-adaptive oil injection device.
Background
Screw compressors are two types, oil-injected and oil-free. The earliest applications in the process flow were oil-free. The last century oil-injected screw compressors have expanded from the field of refrigeration and air compressors to the field of technology. Oil-injected screw compressors have been developed further in technology and have become one of the important directions of compressor development.
The oil-spraying type double-screw compressor is a rotary positive-displacement compressor, in the interior of compressor body a pair of female and male rotors which are mutually meshed and are opposite in rotating direction are set, the female rotor is concave, and the male rotor is convex, and the male rotor can be used for driving female rotor and mutually meshed and can be rotated, and its primitive volume is formed from female and male rotor tooth face, contact line, shell body and end cover. In the running process of the rotor, lubricating oil is continuously sprayed into the working cavity of the compressor to provide lubricating oil for the bearings, the shaft seals and the balance pistons, and the lubricating oil plays roles of lubricating, cooling, sealing and silencing in the unit. When the volume between the tooth grooves of the two rotors is gradually enlarged and communicated with the suction inlet, the gas is sucked between the tooth grooves and forms a mixture with the injected lubricating oil, the two rotors continue to rotate, the tooth parts of the two rotors are mutually inserted into the tooth grooves of the other side, and the volume enclosed in the groove is gradually reduced along with the increase of the inserted length, so that the aim of compressing and boosting is fulfilled. When the tooth grooves of the two sections of rotors are communicated with the exhaust holes, the mixture of gas and lubricating oil is discharged out of the compressor and enters the oil separator for oil-gas separation. The separated gas is discharged outside the machine and enters a condenser, the separated lubricating oil is settled at the bottom of the oil separator, and the lubricating oil is sprayed into a working cavity of the unit for recycling after being cooled by an oil cooler, filtered by an oil filter and boosted by a lubricating oil pump.
The oil injection device in the oil injection type double-screw compressor is used for lubricating and cooling the compressor, when the compressor works, the synchronous gear is used as an important transmission part, considerable heat is generated due to numerous factors such as friction, moment and the like, and lubricating oil injection cooling is required to be continuously carried out to ensure the normal operation of the compressor, so that an oil injection device specially used for an oil injection cooling system of the synchronous gear of the compressor is required to be designed, the existing oil injection device is generally provided with oil injection nozzles respectively at the first stage and the second stage of the two-stage compressor, the oil injection quantity is regulated in real time through a control system according to the change of the working temperature of the compressor, but for the screw type two-stage compressor, the first stage compression stage and the second stage compression stage are not necessarily in the same working condition, and therefore, the requirements on lubrication are different, for example, when the compressor is in high-speed high-load operation, the requirement on lubrication is higher, and conversely, the requirement on lubrication is lower. Therefore, the existing oil injection device cannot adjust the oil injection quantity according to the working condition of the compressor, so that the condition of excessive oil injection is easily caused, the use efficiency of lubricating oil is low, and the loss of mechanical transmission efficiency is caused by excessive use of the lubricating oil.
Disclosure of Invention
In order to solve the technical problems, the application provides the double-screw two-stage compression self-adaptive oil injection device which can accurately provide cooling and lubricating oil for a two-stage compressor, improve the service efficiency of the lubricating oil and reduce the loss of mechanical transmission efficiency.
In order to solve the technical problems and achieve the aim of the application, the application is realized by the following technical scheme:
the double-screw two-stage compression self-adaptive oil injection device comprises two stages of compression stages, namely a first compression stage and a second compression stage, wherein one end of the first compression stage is connected with an air inlet pipe, the other end of the first compression stage is connected with an air outlet pipe of the first compression stage, the other end of the air outlet pipe of the first compression stage is connected with the second compression stage, the other end of the second compression stage is connected with an air outlet pipe of the second compression stage, the air outlet pipe of the second compression stage is connected with an oil-gas barrel, an oil-gas separator is arranged on the oil-gas barrel, an oil outlet pipe is arranged at the lower part of the oil-gas barrel, and a condenser is arranged on the oil outlet pipe; the oil pipe part passing through the condenser is an oil inlet main pipe, the oil inlet main pipe is sequentially connected with a second electric control valve and a first electric control valve, the first electric control valve is a three-opening electric control valve, one opening is connected with the oil inlet main pipe, the other two openings are respectively connected with a first-stage oil inlet pipe and a second-stage oil inlet pipe, and the other ends of the first-stage oil inlet pipe and the second-stage oil inlet pipe are respectively connected with a first compression stage and a second compression stage; the system comprises a first compression stage and a second compression stage, and is characterized by further comprising a measuring module, wherein the measuring module comprises a sensor group, the measuring module is connected with a control system, the first electric control valve, the second electric control valve and the sensor group are connected with the control system, and the control system controls the first electric control valve and the second electric control valve through data measured by the sensor group, so that the oil quantity entering the first-stage oil inlet pipe and the second-stage oil inlet pipe is changed along with the change of the output power of the first compression stage and the second compression stage.
Further, the sensor group comprises a first sensor group and a second sensor group, the first sensor group comprises a first flow sensor and a first pressure sensor, the second sensor group comprises a second flow sensor and a second pressure sensor, and the two sensor groups are respectively connected with the control system.
Further, the condenser comprises a refrigerant outlet and a refrigerant inlet, and a third electric control valve is arranged on the refrigerant inlet.
Further, the sensor group further comprises a temperature sensor, and the temperature sensor is used for measuring the internal temperature of the two-stage compression stage; the control system controls the third electric control valve according to the temperature so that the internal temperature of the compression stage is constant.
Further, the control system is connected with the data acquisition module, the data processing module and the control module, the data acquisition module is respectively connected with the first flow sensor, the first pressure sensor, the second flow sensor and the second pressure sensor, the acquired data are preprocessed and then transmitted to the data processing module, the data processing module carries out logic processing on the acquired data to obtain first power P1 of the first compression stage and second power P2 of the second compression stage, the control module controls the relative proportion of cooling oil output to the first-stage oil inlet pipe and the second-stage oil inlet pipe through the control module according to the relative proportion of the first power P1 and the second power P2, and the control module controls the opening degree of the second electric control valve according to the total power of the first power P1 and the second power P2 to obtain the total supply quantity of the cooling oil.
Further, the data acquisition module is connected with the temperature sensor, after the temperature sensor acquires the two-stage compression stage temperatures T1 and T2, the processing module compares the two temperatures T1 and T2, and the higher temperature is compared with a set temperature threshold value, so that the opening of the third electric control valve is controlled.
Further, the opening degree of the second electric control valve is controlled in a lookup table mode, the total power of the two-stage compression stages is calculated by a data processing module in the control module, the opening degree corresponding to the second electric control valve is obtained through comparison with the lookup table, and the total power of the two-stage compression stages corresponds to the second electric control valve one by one.
Further, the first electric control valve is an electromagnetic valve and comprises an oil inlet A, an oil outlet B1, an oil outlet B2, a spring, a valve core, an armature and a coil, wherein the armature is driven to move left and right after the current is sensed by the electrified coil, when the single valve core moves leftwards, the opening degree of the oil outlet B1 is reduced, the opening degree of the oil outlet B2 is increased, and when the single valve core moves rightwards, the opening degree of the oil outlet B1 is increased, and the opening degree of the oil outlet B2 is reduced.
Further, the control system is a singlechip.
Compared with the prior art, the application has the following beneficial effects:
compared with the prior art, the application can reasonably distribute the oil injection quantity between the first compression stage and the second compression stage according to the power ratio of the first compression stage and the second compression stage, and simultaneously adjust the total oil supply quantity according to the total power of the first compression stage and the second compression stage by combining the second electric control valve, thereby accurately providing cooling and lubricating oil for the two-stage compressor, improving the service efficiency of the lubricating oil and reducing the waste of mechanical transmission efficiency. The opening of the second electric control valve is controlled by adopting a lookup table, and in actual work of the oil injection device, the data processing module in the control module calculates the total power of the two stages of compression stages, the opening corresponding to the second electric control valve is obtained by comparing the total power with the lookup table, and the total power of the two stages of compression stages corresponds to the second electric control valve one by one, so that the control is simple and efficient. After the two-stage compression stage temperatures T1 and T2 are acquired, the two temperatures are compared through the processing module, and the higher temperature is compared with the set temperature threshold value, so that the opening degree of the third electric control valve is controlled, and the equipment cost is simplified under the condition that the requirement of certain control precision is met.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a schematic diagram of a double-screw two-stage compression self-adaptive oil injection device.
Fig. 2 is a schematic diagram of a control system.
Fig. 3 is a schematic view of a first electrically controlled valve.
In the figure: 1-air inlet pipe, 2-first compression stage, 3-first flow sensor, 4-first pressure sensor, 5-first compression stage air outlet pipe, 6-second compression stage, 7-second flow sensor, 8-second pressure sensor, 9-second compression stage air outlet pipe, 10-oil gas bucket, 11-oil gas separator, 12-oil outlet pipe, 13-condenser, 14-refrigerant outlet, 15-refrigerant inlet, 16-third electric control valve, 17-oil inlet main pipe, 18-second electric control valve, 19-second stage oil inlet pipe, 20-first electric control valve, 201-valve body, 202-spring, 203-valve core, 204-armature, 205-coil, 206-shell, 207-plug, 21-first stage oil inlet pipe, 22-control system, 221-data acquisition module, 222-data processing module and 223-control module.
Detailed Description
Embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
Other advantages and effects of the present disclosure will become readily apparent to those skilled in the art from the following disclosure, which describes embodiments of the present disclosure by way of specific examples. It will be apparent that the described embodiments are merely some, but not all embodiments of the present disclosure. The disclosure may be embodied or practiced in other different specific embodiments, and details within the subject specification may be modified or changed from various points of view and applications without departing from the spirit of the disclosure. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, based on the embodiments in this disclosure are intended to be within the scope of this disclosure.
It should also be noted that the illustrations provided in the following embodiments merely illustrate the basic concepts of the disclosure by way of illustration, and only the components related to the disclosure are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.
Referring to fig. 1, a schematic structure of a twin-screw two-stage compression adaptive oil injection device according to an embodiment is shown. As shown in the figure, the double-screw two-stage compression self-adaptive oil injection device comprises two stages of compression stages, namely a first compression stage 2 and a second compression stage 6, wherein one end of the first compression stage is connected with an air inlet pipe 1, the other end of the first compression stage is connected with a first compression stage air outlet pipe 5, the other end of the first compression stage air outlet pipe 5 is connected with a second compression stage air outlet pipe 6, the other end of the second compression stage 6 is connected with a second compression stage air outlet pipe 9, the second compression stage air outlet pipe 9 is connected with an oil-gas barrel 10, an oil-gas separator 11 is arranged on the oil-gas barrel 10, an oil outlet pipe 12 is arranged at the lower part of the oil-gas barrel 10, a condenser 13 is arranged on the oil outlet pipe 12, the condenser 13 comprises a refrigerant outlet 14 and a refrigerant inlet 15 for discharging and supplying required refrigerant, and a third electric control valve 16 is arranged on the refrigerant inlet 15; the oil pipe part passing through the condenser is an oil inlet main pipe 17, the oil inlet main pipe 17 is connected with a first electric control valve 20 through a second electric control valve 18, the first electric control valve 20 is a three-opening electric control valve, the other two openings are respectively connected with a first-stage oil inlet pipe 21 and a second-stage oil inlet pipe 19, and the other ends of the first-stage oil inlet pipe 21 and the second-stage oil inlet pipe 19 are respectively connected with a first compression stage and a second compression stage.
The double-screw two-stage compression self-adaptive oil injection device further comprises a first flow sensor 3, a first pressure sensor 4, a second flow sensor 7, a second pressure sensor 8, a temperature sensor T and a control system 22. The first flow sensor 3, the first pressure sensor 4, the second flow sensor 7, the second pressure sensor 8 and the temperature sensor T are respectively connected with a control system 22; in addition, the first, second and third electric control valves are also connected with the control system.
Referring to fig. 2, which is a schematic diagram of another embodiment of a control system, as shown in the drawing, a control system 22 is connected to a data acquisition module 221, a data processing module 222, and a control module 223. The data acquisition module is respectively connected with the first flow sensor 3, the first pressure sensor 4, the second flow sensor 7, the second pressure sensor 8 and the temperature sensor T, and is configured to acquire the gas flow and the gas pressure at the output end of the first compression stage, the gas flow and the gas pressure at the output end of the second compression stage, and the internal temperatures of the first compression stage and the second compression stage, and to pre-process the data and transmit the pre-processed data to the data processing module 222.
The data processing module is preferably a single chip microcomputer, which performs logic processing on the collected data, integrates the flow and the pressure collected by the first flow sensor 3 and the first pressure sensor 4 to obtain a first power P1, integrates the flow and the pressure collected by the second flow sensor 7 and the second pressure sensor 8 to obtain a second power P2, and compares the magnitudes of the first power P1 and the second power P2, wherein the magnitude results correspond to the valve core movement displacement of the first electric control valve 20 and the opening of the second electric control valve 18. Specifically, the relative magnitudes of the first power P1 and the second power P2 can be compared to determine the valve core motion displacement of the first electric control valve 20, so that the control module 223 controls the relative proportion of the cooling oil output to the first-stage oil inlet pipe and the second-stage oil inlet pipe by the first electric control valve 20; the first power P1 and the second power P2 are summed to obtain the total power, so that the opening degree of the second electronic control valve 18 is controlled by the control module 223 to obtain the total supply amount of the cooling oil.
Further, for how to control the opening of the second electrically controlled valve 18 specifically, the opening of the second electrically controlled valve 18 is controlled by adopting a look-up table, for example, in a research and development test stage of the oil injection device, the oil injection quantity of the oil film which can be formed generally under different total powers of the first compressor and the second compressor stage is measured, the opening of the second electrically controlled valve 18 is further obtained by conversion according to the oil injection quantity, and the look-up table of the power relative to the opening of the second electrically controlled valve 18 can be obtained through trial and error under different powers. In actual operation of the oil injection device, the data processing module in the control module calculates total power of two stages of compression stages, and obtains the opening corresponding to the second electric control valve 18 by comparing with the lookup table, wherein the total power of the two stages of compression stages corresponds to the second electric control valve one by one.
Furthermore, because the formation of an oil film between the screws is mainly influenced by the rotating speed and the load, the oil injection of the compression stages can be controlled by monitoring the rotating speed and the load, and further, the application preferably adopts the pressure and flow sensors to monitor each compression stage.
Further, the above control is necessary for controlling the internal temperature of the compressor to be within a reasonable range, so the present application further includes temperature sensors provided at two stages of compression stages, and the processing module 222 compares the collected real-time temperature T with a threshold temperature, and controls the opening of the third electric control valve 16 according to the comparison result, so as to precisely adjust the temperature of the cooling oil, and in general, two stages of compression stages are independently cooled, and the independent oil supply is performed by the respective temperature sensors, which is complicated and increases the cost of the apparatus. After the two-stage compression stage temperatures T1 and T2 are acquired, the two temperatures are compared through the processing module, and the higher temperature is compared with the set temperature threshold value, so that the opening degree of the third electric control valve 16 is controlled.
Referring to FIG. 3, another embodiment control system architecture is shown. As shown in the drawing, the first electrically controlled valve is preferably a solenoid valve, which includes an oil inlet a, an oil outlet B1, an oil outlet B2, a spring 202, a valve core 203, an armature 204 and a coil 205, wherein the control current input into the solenoid valve is controlled by a control module 223, the armature 204 is driven to move left and right after the current is sensed by the energized coil 205, as shown in fig. 3, when the single valve core moves leftwards, the opening of the oil outlet B1 is reduced, and when the single valve core moves rightwards, the opening of the oil outlet B1 is increased, and the opening of the oil outlet B2 is reduced, so that the oil quantity input into the first compression stage and the second compression stage can be reasonably distributed by controlling the relative proportion of the opening of the oil outlet B1 and the opening of the oil outlet B2.
The above examples are only illustrative of the preferred embodiments of the present application and are not intended to limit the scope of the present application, and various modifications and improvements made by those skilled in the art to the technical solution of the present application should fall within the scope of protection defined by the claims of the present application without departing from the spirit of the present application.
Claims (7)
1. The utility model provides a twin-screw two-stage compression self-adaptation oil spout device which characterized in that: the device comprises two stages of compression stages, wherein the two stages of compression stages are a first compression stage and a second compression stage respectively, one end of the first compression stage is connected with an air inlet pipe, the other end of the first compression stage is connected with a first compression stage air outlet pipe, the other end of the first compression stage air outlet pipe is connected with the second compression stage, the other end of the second compression stage is connected with a second compression stage air outlet pipe, the second compression stage air outlet pipe is connected with an oil-gas barrel, an oil-gas separator is arranged on the oil-gas barrel, an oil outlet pipe is arranged at the lower part of the oil-gas barrel, and a condenser is arranged on the oil outlet pipe; the oil pipe part passing through the condenser is an oil inlet main pipe, the oil inlet main pipe is sequentially connected with a second electric control valve and a first electric control valve, the first electric control valve is a three-opening electric control valve, one opening is connected with the oil inlet main pipe, the other two openings are respectively connected with a first-stage oil inlet pipe and a second-stage oil inlet pipe, and the other ends of the first-stage oil inlet pipe and the second-stage oil inlet pipe are respectively connected with a first compression stage and a second compression stage; the system comprises a first compression stage, a second compression stage, a first electric control valve, a second electric control valve, a sensor group, a measuring module and a control system, wherein the measuring module comprises the sensor group, the measuring module is connected with the control system, the first electric control valve, the second electric control valve and the sensor group are connected with the control system, and the control system controls the first electric control valve and the second electric control valve through data measured by the sensor group, so that the oil quantity entering the first-stage oil inlet pipe and the second-stage oil inlet pipe is changed along with the change of the output power of the first compression stage and the second compression stage; the sensor group comprises a first sensor group and a second sensor group, the first sensor group comprises a first flow sensor and a first pressure sensor, the second sensor group comprises a second flow sensor and a second pressure sensor, and the first sensor group and the second sensor group are respectively connected with the control system; the control system comprises a data acquisition module, a data processing module and a control module, wherein the data acquisition module is respectively connected with a first flow sensor, a first pressure sensor, a second flow sensor and a second pressure sensor, the acquired data is preprocessed and then transmitted to the data processing module, the data processing module carries out logic processing on the acquired data to obtain first power P1 of a first compression stage and second power P2 of a second compression stage, the control module controls the relative proportion of cooling oil output to a first-stage oil inlet pipe and a second-stage oil inlet pipe by a first electric control valve according to the relative proportion of the first power P1 and the second power P2, and the control module controls the opening degree of the second electric control valve according to the total power of the first power P1 and the second power P2 to obtain the total supply quantity of the cooling oil.
2. A twin screw two stage compression adaptive oil injection apparatus as defined in claim 1 wherein: the condenser comprises a refrigerant outlet and a refrigerant inlet, and a third electric control valve is arranged on the refrigerant inlet.
3. A twin screw two stage compression adaptive oil injection apparatus as defined in claim 2 wherein: the sensor group also comprises a temperature sensor, and the temperature sensor is used for measuring the internal temperature of the two-stage compression stage; the control system controls the third electric control valve according to the temperature so that the internal temperature of the two-stage compression stage is constant.
4. A twin screw two stage compression adaptive oil injection apparatus as defined in claim 3 wherein: the data acquisition module is connected with the temperature sensor, after the temperature sensor acquires the temperature T1 and the temperature T2 of the two-stage compression stage, the processing module compares the temperature T1 with the temperature T2, and the higher temperature is compared with a set temperature threshold value, so that the opening degree of the third electric control valve is controlled.
5. A twin screw two stage compression adaptive oil injection apparatus as defined in claim 1 wherein: and controlling the opening of the second electric control valve in a lookup table mode, wherein a data processing module in the control module calculates the total power of the two stages of compression stages, and the total power of the two stages of compression stages corresponds to the second electric control valve one by comparing the total power with the lookup table to obtain the opening corresponding to the second electric control valve.
6. A twin screw two stage compression adaptive oil injection apparatus as defined in any one of claims 1-5 wherein: the first electric control valve is an electromagnetic valve and comprises an oil inlet A, an oil outlet B1, an oil outlet B2, a spring, a valve core, an armature and a coil, wherein the armature is driven to move left and right after the current is sensed by the electrified coil, when the valve core moves leftwards, the opening of the oil outlet B1 is reduced, the opening of the oil outlet B2 is increased, and when the valve core moves rightwards, the opening of the oil outlet B1 is increased, and the opening of the oil outlet B2 is reduced.
7. A twin screw two stage compression adaptive oil injection apparatus as defined in any one of claims 1-5 wherein: the control system is a singlechip.
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| CN202310969762.1A CN116677606B (en) | 2023-08-03 | 2023-08-03 | Double-screw two-stage compression self-adaptive oil injection device |
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| CN202310969762.1A CN116677606B (en) | 2023-08-03 | 2023-08-03 | Double-screw two-stage compression self-adaptive oil injection device |
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| CN116677606B true CN116677606B (en) | 2023-10-20 |
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| US20080279708A1 (en) * | 2005-12-23 | 2008-11-13 | Gardner Denver, Inc. | Screw Compressor with Oil Feed System |
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| CN116677606A (en) | 2023-09-01 |
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