CN108547763B - Air inlet adjusting device for closed performance test system of reciprocating compressor - Google Patents
Air inlet adjusting device for closed performance test system of reciprocating compressor Download PDFInfo
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- CN108547763B CN108547763B CN201810663734.6A CN201810663734A CN108547763B CN 108547763 B CN108547763 B CN 108547763B CN 201810663734 A CN201810663734 A CN 201810663734A CN 108547763 B CN108547763 B CN 108547763B
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- 238000011056 performance test Methods 0.000 title claims abstract description 30
- 230000001502 supplementing effect Effects 0.000 claims abstract description 97
- 230000001105 regulatory effect Effects 0.000 claims abstract description 36
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 4
- 238000004880 explosion Methods 0.000 claims description 15
- 238000002955 isolation Methods 0.000 claims description 15
- 239000012528 membrane Substances 0.000 claims description 10
- 230000010349 pulsation Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims 2
- 230000003139 buffering effect Effects 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 12
- 239000007789 gas Substances 0.000 description 28
- 239000000872 buffer Substances 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000013589 supplement 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
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The invention belongs to the technical field related to compressor testing, and discloses an air inlet regulating device for a closed performance test system of a reciprocating compressor, wherein the air inlet regulating device comprises an air supplementing component and an air inlet temperature and pressure regulating component which are connected, and the air inlet regulating device is respectively connected with an exhaust pipeline and an air inlet of a compressor to be tested through the air inlet temperature and pressure regulating component; the air supplementing component and the air inlet temperature and pressure regulating component cooperate to enable the air inlet temperature and air inlet pressure of the compressor to be tested to be stable at a preset air inlet temperature and preset air inlet pressure; the air supplementing assembly is used for providing a stable air source to charge the air inlet temperature and pressure adjusting assembly and comprises an air supplementing compressor, an air supplementing air storage tank and a control valve group which are sequentially connected; the air inlet temperature and pressure adjusting assembly comprises an air inlet storage tank, and the air inlet storage tank is used for stabilizing air inlet flow of the compressor to be tested. The invention improves stability and precision, has higher flexibility and stronger practicability.
Description
Technical Field
The invention belongs to the technical field related to compressor testing, and particularly relates to an air inlet adjusting device for a closed performance test system of a reciprocating compressor.
Background
The compressor is widely applied to the fields of petrochemical industry, construction machinery and the like as general machinery, and has great significance in the aspects of testing whether a finished compressor is qualified or not, optimizing the structure and performance of the compressor and the like by performing performance test on the compressor.
The closed performance test system of the reciprocating compressor comprises an open system and a closed system, wherein the open system is simple to operate, equipment installation requirements and cost are relatively low, the existing reciprocating compressor performance test bed mostly adopts the circulation mode, an air inlet part of the compressor in the open system is directly connected with the atmosphere, an air inlet working condition is close to an atmospheric working condition, a test working medium is limited (only air) and the test working condition is seriously deviated from a design working condition.
At present, a closed circulation mode is adopted for a performance test bed designed for the small reciprocating compressor, and the test conditions are more similar to the design conditions of the compressor by regulating and controlling the air suction working conditions and the medium types, so that the problem of limited working media and working conditions in an open system is well solved. However, the air inlet part of the existing closed circulation test system of the small reciprocating compressor is not provided with a buffer and storage device, but an air supplementing cylinder is adopted to directly charge air in a closed system pipeline, so that the air suction pulsation of the reciprocating compressor has an influence on the accuracy of flow measurement and the stability of air inlet, and the control accuracy requirement is high, and if the air supplementing is not in time or insufficient, safety accidents are very easy to occur. Accordingly, there is a need in the art to develop an air intake adjusting device for a closed-type performance test system of a reciprocating compressor that has high stability and accuracy.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the invention provides an air inlet regulating device for a closed performance test system of a reciprocating compressor, which researches and designs the air inlet regulating device with good stability and precision for the closed performance test system of the reciprocating compressor based on the working characteristics of the existing closed performance test system of the reciprocating compressor. The air inlet adjusting device adjusts the air inlet temperature and pressure of the compressor through the air supplementing component and the air inlet temperature and pressure adjusting component, and meanwhile, air flow pulsation is reduced through the air inlet and air storage tank to buffer air inlet air flow, and air supplementing of the system is accurately controlled through the valve group, so that air inlet adjustment and performance test of the compressor unit to be tested under multiple air inlet working conditions are realized under the condition that running stability, operation safety and test accuracy of a test system are ensured.
In order to achieve the above purpose, the invention provides an air inlet regulating device for a closed performance test system of a reciprocating compressor, the air inlet regulating device comprises an air supplementing component and an air inlet temperature and pressure regulating component, the air supplementing component is connected with the air inlet temperature and pressure regulating component, and the air inlet regulating device is connected with an exhaust pipeline and an air suction port of a compressor to be tested through the air inlet temperature and pressure regulating component;
The air supplementing component and the air inlet temperature and pressure regulating component cooperate to enable the air inlet temperature and air inlet pressure of the compressor to be tested to be stable at a preset air inlet temperature and preset air inlet pressure; the air supplementing assembly is used for providing a stable air source to charge the air inlet temperature and pressure adjusting assembly and comprises an air supplementing compressor, an air supplementing air storage tank and a control valve group which are sequentially connected, wherein the air supplementing air storage tank is used for storing supplementing air; the air inlet temperature and pressure adjusting component is used for keeping the temperature and pressure of air inlet of the compressor to be tested constant and comprises an air inlet and air storage tank, and the air inlet and air storage tank is used for stabilizing air inlet flow of the compressor to be tested.
Further, the air inlet temperature and pressure adjusting assembly further comprises a temperature fine-tuning heat exchanger, and the air inlet and air storage tank is connected to the exhaust pipeline through the temperature fine-tuning heat exchanger.
Further, the control valve group comprises a manual stop valve, a pressure reducing valve, an electromagnetic valve, an automatic regulating valve and a check valve, and the air supplementing and storing tank, the stop valve, the pressure reducing valve, the electromagnetic valve, the automatic regulating valve, the check valve and the air inlet and storing tank are sequentially connected.
Further, the air supplementing assembly comprises a first stop valve and a drying filter, and the air supplementing compressor is connected with the air supplementing air storage tank through the drying filter and the first stop valve in sequence.
Further, the air supplementing assembly further comprises a second stop valve and a special working medium air supplementing cylinder, one end of the second stop valve is connected to a pipeline between the air supplementing air storage tank and the first stop valve, and the other end of the second stop valve is connected to the special working medium air supplementing cylinder; the first stop valve is interlocked with the second stop valve, i.e. when the first stop valve or the second stop valve is opened, the second stop valve or the first stop valve is closed.
Further, the air supplementing assembly further comprises a first temperature sensor and a first pressure sensor which are respectively arranged on the air supplementing air storage tank, and the first temperature sensor and the first pressure sensor are respectively used for detecting the temperature and the pressure of the air in the air supplementing air storage tank.
Further, the air supplementing assembly further comprises a first safety valve and a first pressure relief electromagnetic valve which are respectively arranged on the air supplementing and storing tank, and the first safety valve and the first pressure relief electromagnetic valve are connected to the vent.
Further, the air inlet temperature and pressure adjusting assembly further comprises a second blowdown valve, a second temperature sensor, a second pressure sensor, a quick-opening air inlet electromagnetic valve and a vacuum-proof negative pressure control valve, wherein the second blowdown valve, the second temperature sensor, the second pressure sensor, the quick-opening air inlet electromagnetic valve and the vacuum-proof negative pressure control valve are respectively arranged on the air inlet storage tank.
Further, the air inlet temperature and pressure adjusting assembly further comprises a rupture disc and a flange joint, wherein the flange joint is connected with the air inlet and storage tank, and the rupture disc is arranged in the flange joint.
Further, the rupture disk comprises a reverse anti-explosion bracket, an explosion membrane and an isolation net, wherein the explosion membrane is arranged between the reverse anti-explosion bracket and the isolation net, and the isolation net is arranged adjacent to the air inlet and storage tank; the volume of the air inlet and air storage tank is 100 times of the single maximum air suction volume of the compressor to be tested.
In general, compared with the prior art, the air inlet adjusting device for the closed performance test system of the reciprocating compressor mainly has the following beneficial effects:
1. the air supplementing component and the air inlet temperature and pressure adjusting component cooperate with each other, so that under the condition of guaranteeing the constant temperature and pressure of air inlet working conditions, the valve group can automatically control and accurately simulate various air inlet working condition levels, and the test of various test working medium compressor types can be realized by means of pipeline switching, so that the air inlet temperature and pressure adjusting component has a wider application range.
2. The air supplementing air storage tank is used for storing part of supplementing air so as to prevent frequent start and stop of the air supplementing compressor, and can buffer air supplementing flow and reduce exhaust pulsation of the air supplementing compressor.
3. The quick-opening air inlet electromagnetic valve, the anti-vacuum negative pressure control valve and the rupture disk are arranged on the air inlet and air storage tank at the same time, so that the air inlet and air storage tank is prevented from forming vacuum to explode from multiple angles, the negative pressure risk is prevented, and the air inlet and air storage tank is subjected to multiple protection; the gas flow in the gas supplementing pipeline is controlled through the automatic regulating valve in the gas supplementing assembly, so that the safety is ensured, the danger caused by closing of the valve is avoided through setting the minimum valve position, and the operation safety of the system is improved.
4. The explosion membrane is arranged between the reverse explosion-proof support and the isolation net, the isolation net is adjacent to the air inlet and air storage tank, the reverse explosion-proof support is tightly attached to the explosion membrane to prevent the explosion membrane from being reversely exploded under positive pressure, and the isolation net is used for preventing residual fragments after explosion from entering the air inlet and air storage tank to block a pipeline.
Drawings
Fig. 1 is a schematic view of an intake air adjusting apparatus for a closed-type performance test system of a reciprocating compressor according to a first embodiment of the present invention.
Fig. 2 is a partial cross-sectional view of the rupture disc structure of the intake air conditioning apparatus for the reciprocating compressor closed-form performance test system of fig. 1.
Fig. 3 is a schematic view of a reverse burst stent of the air intake adjustment device for the closed-form performance test system of the reciprocating compressor of fig. 2.
Fig. 4 is a schematic view of a rupture disc of the air intake adjusting device for the closed-form performance test system of the reciprocating compressor of fig. 2.
Fig. 5 is a schematic view of an insulation net of the air intake adjusting device for the closed-type performance test system of the reciprocating compressor of fig. 2.
The same reference numbers are used throughout the drawings to reference like elements or structures, wherein: 1-air supplementing assembly, 10-manual stop valve, 11-pressure reducing valve, 12-electromagnetic valve, 13-automatic regulating valve, 14-check valve, 15-air supplementing air storage tank, 16-first blowdown valve, 17-first temperature sensor, 18-first pressure sensor, 19-first safety valve, 20-first pressure relieving electromagnetic valve, 21-first stop valve, 22-dry filter, 23-air supplementing compressor, 24-second stop valve, 25-special working medium air supplementing cylinder, 2-air inlet temperature and pressure regulating assembly, 30-air inlet air storage tank, 31-second blowdown valve, 32-second temperature sensor, 33-second pressure sensor, 34-quick-opening air inlet electromagnetic valve, 35-vacuum negative pressure control valve, 36-rupture disk, 37-second safety valve, 38-second pressure relieving electromagnetic valve, 39-temperature fine-adjusting heat exchanger, 40-flange joint, 41-clamping ring, 42-reverse explosion-proof bracket, 43-rupture membrane, 44-isolation net.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Referring to fig. 1 and 2, an air intake adjusting device for a closed performance test system of a reciprocating compressor according to a first embodiment of the present invention is connected to a compressor to be tested, and includes an air supplementing assembly 1 and an air intake temperature and pressure adjusting assembly 2, wherein the air supplementing assembly 1 is connected to the air intake temperature and pressure adjusting assembly 2, and the air intake temperature and pressure adjusting assembly 2 is used for connecting the compressor to be tested.
The air supplementing assembly 1 is used for establishing a stable air source to charge the air supplementing assembly, and comprises a manual stop valve 10, a pressure reducing valve 11, an electromagnetic valve 12, an automatic regulating valve 13, a check valve 14, an air supplementing air storage tank 15, a first blow-down valve 16, a first temperature sensor 17, a first pressure sensor 18, a first safety valve 19, a first pressure relief electromagnetic valve 20, a first stop valve 21, a drying filter 22, an air supplementing compressor 23, a second stop valve 24 and a special working medium supplementing cylinder 25.
The inlet and outlet of the dry filter 22 are connected to one end of the air-supplementing compressor 23 and one end of the first stop valve 21, respectively, and the other end of the first stop valve 21 is connected to the air-supplementing air tank 15. One end of the second stop valve 24 is connected to a pipeline between the air supplementing air storage tank 15 and the first stop valve 21, and the other end thereof is connected to the special working medium supplementing air bottle 25. The air supplementing and storing tank 15 is connected to the air intake temperature and pressure regulating assembly 2 through the manual stop valve 10, the pressure reducing valve 11, the electromagnetic valve 12, the automatic regulating valve 13 and the check valve 14 in sequence. The first blow-down valve 16, the first temperature sensor 17 and the first pressure sensor 18 are respectively disposed on the air supply and storage tank 15. One end of the first safety valve 19 is connected to the air supply storage tank 15, and the other end is connected to an evacuation port. One end of the first pressure relief electromagnetic valve 20 is connected to the air supplementing air storage tank 15, and the other end is connected to the emptying port.
The manual stop valve 10, the pressure reducing valve 11, the electromagnetic valve 12, the automatic regulating valve 13 and the check valve 14 form a control valve group, and the control valve group is used for precisely controlling the air supplementing operation. Wherein the manual shut-off valve 10 is used to establish a back pressure condition required for the exhaust line of the air-compensating compressor 23 when the air-compensating compressor 23 is started; when the discharge pressure of the air-make-up compressor 23 is constant, different air-make-up pressures (the air-make-up pressure value is equal to the air-intake pressure value of the compressor to be tested) are obtained by setting the valve back pressure value of the pressure-reducing valve 11, so as to adapt to different air-intake pressure models; the electromagnetic valve 12 is used for controlling the opening and closing of the air supplementing pipeline so as to cut off the air supplementing pipeline and end the air supplementing process when the air supplementing is completed; the automatic regulating valve 13 is used for controlling the gas flow in the gas supplementing pipeline, and in order to ensure the regulating safety, the automatic regulating valve 13 is provided with minimum valve position control so as to avoid danger caused by closing the valve; the check valve 14 is used for the gas backflow phenomenon in the gas supplementing pipeline.
The air supply and storage tank 15 can store part of the supplementary air during air supply to prevent frequent start and stop of the air supply compressor 23, and also can buffer the air supply flow and reduce the exhaust pulsation of the air supply compressor 23. The first temperature sensor 17 and the first pressure sensor 18 provided on the air-supplementing air storage tank 15 are respectively used for detecting the temperature and the pressure of the air in the air-supplementing air storage tank 15; the first safety valve 19 is used for preventing the gas in the air supplementing and storing tank 15 from being over-pressurized; the first pressure relief electromagnetic valve 20 is used for performing pressure relief operation on the air supplementing and storing tank 15 during shutdown; the blow-down valve 16 is used for blow-down the air supplementing and storing tank 15.
When the supplementing gas is special gas (such as natural gas, etc.), the first stop valve 21 is cut off, the second stop valve 24 is opened, and the special working medium supplementing gas cylinder 25 supplements gas to the component to be supplemented through the supplementing gas storage tank 15 and the control valve group.
Referring to fig. 3, 4 and 5, the intake air temperature and pressure adjusting assembly 2 is used for ensuring the constant temperature and pressure of intake air in a closed circulation system, and comprises an intake air tank 30, a second blow-down valve 31, a second temperature sensor 32, a second pressure sensor 33, a quick-open intake electromagnetic valve 34, a vacuum-proof negative pressure control valve 35, a rupture disk 36, a second safety valve 37, a second pressure relief electromagnetic valve 38, a temperature fine-tuning heat exchanger 39 and a flange joint 40.
The temperature fine-tuning heat exchanger 39 is connected to an exhaust pipeline of the compressor to be tested, a cooling assembly, a throttling and depressurization assembly and a flow measurement assembly are sequentially arranged on the exhaust pipeline, one end of the temperature fine-tuning heat exchanger 39 is connected to the flow measurement assembly, the other end of the temperature fine-tuning heat exchanger is connected to the air inlet and air storage tank 30, and the temperature fine-tuning heat exchanger is used for accurately adjusting the exhaust temperature of the compressor to be tested. In the present embodiment, the flow rate of the heat exchange medium in the temperature fine-tuning heat exchanger 39 is adjusted according to the gas temperature signal in the gas inlet and gas storage tank 30.
The air inlet and air storage tank 30 is used for establishing the air inlet pressure working condition of the compressor to be tested, stabilizing the air inlet flow and reducing the air suction pulsation so as to prevent the influence on the accuracy of flow metering in the system. In this embodiment, the volume of the air intake and storage tank 30 is 100 times of the single maximum air intake of the compressor to be tested, so as to reduce air intake pulsation to the greatest extent; one interface of the air inlet and storage tank 30 is connected to an air inlet of the compressor to be tested.
The second relief valve 37 and the second pressure relief electromagnetic valve 38 are respectively disposed on the air intake and storage tank 30, and are both connected to the evacuation port. The second blow-down valve 31, the second temperature sensor 32, the second pressure sensor 33, the quick-opening air intake electromagnetic valve 34, and the vacuum-proof negative pressure control valve 35 are respectively disposed on the air intake and storage tank 30.
In this embodiment, considering that the closed system is not in communication with the atmosphere, if the problems such as backflow or untimely air supply, and unsuitable air charging rate occur, the air inlet and air storage tank 30 will form vacuum or overpressure in a short time to explode, and at this time, the air inlet and air storage tank 30 is in communication with the atmosphere by the rapid opening of the rapid opening air inlet electromagnetic valve 34, and air flow is rapidly introduced, thereby preventing the air inlet and air storage tank 30 from forming vacuum to explode. The anti-vacuum negative pressure control valve 35 is used for preventing the negative pressure risk of the air inlet and air storage tank 30 so as to secondarily protect the air inlet and air storage tank 30. The flange joint 40 is connected to the intake air reservoir 30, and the rupture disk 36 is disposed within the flange joint 40 by a pair of clamping rings 41. When the pressure of the gas in the gas inlet and storage tank 30 is low or near vacuum, the rupture disk 36 is instantaneously exploded inward to release the gas in a large area, thereby avoiding the explosion of the gas inlet and storage tank 30 due to the collapse.
The rupture disk 36 includes a reverse burst support 42, a rupture disk 43, and an isolation net 44, the rupture disk 43 being disposed between the reverse burst support 42 and the isolation net 44, the isolation net 44 being disposed adjacent the intake air reservoir 30. The reverse explosion-proof bracket 42 is a circular sheet structure, and is provided with a plurality of through holes arranged at intervals. In this embodiment, the reverse burst support 42 has a rigid structure, and an edge thereof is connected to the inner wall of the flange joint 40 and is tightly attached to the burst membrane 43 to prevent the burst membrane 43 from being burst reversely under positive pressure. The isolation net 44 is a circular rigid net structure, and its edge is connected to the inner wall of the flange joint 40, so as to prevent the residual fragments after blasting from entering the air inlet and air storage tank 30 to block the pipeline.
The second relief valve 37 and the second pressure relief solenoid valve 38 are used to prevent the overpressure of the intake air reservoir 30. When the pressure of the intake air storage tank 30 exceeds a predetermined value, the second relief valve 37 and the second pressure relief solenoid valve 38 are opened to automatically release the air, thereby preventing the explosion of the intake air storage tank 30 due to the overpressure. The second pressure relief solenoid valve 38 is also used for relieving the pressure of the air intake and storage tank 30 after the experiment is completed.
The second temperature sensor 32 and the second pressure sensor 33 are respectively configured to detect a gas temperature and a pressure in the intake air storage tank 30, the second temperature sensor 32 is further configured to transmit the detected gas temperature value to a controller, and the controller correspondingly adjusts the flow of the heat exchange medium in the temperature fine-tuning heat exchanger 39 according to the received gas temperature value. Also, the second blow-down valve 31 is used for blow-down of the intake air tank 30.
The air inlet adjusting device for the closed performance test system of the reciprocating compressor provided by the invention is further described in detail below in connection with a specific compressor to be tested. The compressor to be tested is a large reciprocating compressor, the air inlet pressure P 1 =5.4 MPa is set, the air inlet temperature T 1 =25 ℃, and the compressed medium is air.
High-temperature and high-pressure gas discharged by a compressor to be tested in a closed performance test system of the large reciprocating compressor is subjected to primary cooling, throttling and decompression, flow metering and then returns to an air inlet regulating device, so that the air inlet regulating device is commonly used for ensuring the air inlet temperature and pressure of the compressor to be tested to be constant.
The gas working medium flows through the temperature fine-tuning heat exchanger 39 to finely tune the return air temperature, and the controller adjusts the flow of the heat exchange medium in the temperature fine-tuning heat exchanger 39 according to the gas temperature detected by the second temperature sensor 32, so as to ensure that the temperature just drops to the set inlet air temperature T 1 = 25 ℃ of the compressor to be tested after cooling.
The constant air inlet pressure of the compressor to be tested is realized through the air inlet and air storage tank 30 and the air supplementing assembly 1, the air inlet and air storage tank 30 buffers incoming flow, eliminates air flow pulsation of air suction, and ensures that the air suction pressure of the compressor to be tested is stable. In the stage from starting to stable operation of the compressor to be tested, the pressure of the gas at the exhaust side is increased, and the volume is reduced, so that the system needs to be inflated. The maximum exhaust pressure of the air make-up compressor 23 in the air make-up assembly 1 is set to 9MPa, and the air make-up air is stored in the air make-up air tank 15 after being dried and filtered by the dry filter 22. The pressure of the air supplementing air flow is reduced to 5.4MPa (the air inlet pressure of the compressor to be tested) after flowing through the pressure reducing valve 11, so as to charge the air inlet and air storage tank 30, i.e. the closed circulation system. In the inflation process, the opening of the automatic regulating valve 13 is controlled to control the flow of the air supplementing air, the monitoring index of the opening regulation of the automatic regulating valve 13 is the pressure of the air inlet and air storage tank 30, and when the corresponding second pressure sensor 33 detects that the pressure of the air inlet and air storage tank 30 is higher than the set pressure value (5.4 MPa) of the air inlet and air storage tank 30, the opening of the valve is controlled to be reduced, so that the air supplementing flow is reduced, and otherwise, the opening of the valve is increased, and the air supplementing flow is increased. Opening and closing of the air supplementing pipeline is controlled by controlling the opening of the electromagnetic valve 12, the monitoring index of opening and closing of the electromagnetic valve 12 is the pressure of the air inlet and air storage tank 30 and the exhaust pressure of the compressor to be tested, and when the pressure and the exhaust pressure reach the set values, air supplementing is completed, and the electromagnetic valve 12 is controlled to be closed to finish the air supplementing process. The air inlet and air storage tank 30 and each component in the air supplementing assembly 1 cooperate to ensure that the air inlet pressure of the compressor to be tested is stabilized at a set air inlet pressure P 1 =5.4mpa.
When the working medium used by the compressor to be tested is a special working medium, the first stop valve 21 is required to be cut off, and the special working medium gas cylinder 25 is adopted to charge the closed circulation system. The air inlet temperature and pressure control method is consistent with the air test.
According to the air inlet regulating device for the closed performance test system of the reciprocating compressor, provided by the invention, through the cooperative cooperation of the air supplementing air storage tank, the air inlet air storage tank and the related valves, the influence of air flow pulsation on the system is avoided, the stability of air supplementing and the safety of system operation are ensured, the occurrence of system vacuum and overpressure is prevented, and the accuracy of system measurement is improved.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (6)
1. An air inlet adjusting device for a closed performance test system of a reciprocating compressor, which is characterized in that:
the air inlet adjusting device comprises an air supplementing assembly (1) and an air inlet temperature and pressure adjusting assembly (2), the air supplementing assembly (1) is connected with the air inlet temperature and pressure adjusting assembly (2), and the air inlet adjusting device is respectively connected with an exhaust pipeline and an air inlet of a compressor to be tested through the air inlet temperature and pressure adjusting assembly (2);
The air supplementing component (1) and the air inlet temperature and pressure regulating component (2) cooperate to enable the air inlet temperature and air inlet pressure of the compressor to be tested to be stable at a preset air inlet temperature and preset air inlet pressure; the air supplementing assembly (1) is used for providing a stable air source to charge the air inlet temperature and pressure adjusting assembly (2), and comprises an air supplementing compressor (23), an air supplementing air storage tank (15) and a control valve group which are sequentially connected, wherein the air supplementing air storage tank (15) is used for storing and buffering supplementing air; the air inlet temperature and pressure adjusting component (2) is used for keeping the temperature and pressure of air inlet of the compressor to be tested constant and comprises an air inlet and air storage tank, wherein the air inlet and air storage tank is used for reducing air inlet pulsation and stabilizing air inlet flow of the compressor to be tested;
The air inlet temperature and pressure adjusting assembly (2) further comprises a rupture disc (36) and a flange joint (40), the flange joint (40) is connected to the air inlet and storage tank (30), and the rupture disc (36) is arranged in the flange joint (40); the rupture disk (36) comprises a reverse anti-explosion bracket (42), an explosion membrane (43) and an isolation net (44), wherein the explosion membrane (43) is arranged between the reverse anti-explosion bracket (42) and the isolation net (44), and the isolation net (44) is arranged adjacent to the air inlet and storage tank; the volume of the air inlet and storage tank (30) is 100 times of the single maximum air suction amount of the compressor to be tested;
The isolation mesh (44) is a hemispherical rigid mesh structure; the control valve group comprises a manual stop valve (10), a pressure reducing valve (11), an electromagnetic valve (12), an automatic regulating valve (13) and a check valve (14), and the air supplementing and storing tank (15), the manual stop valve (10), the pressure reducing valve (11), the electromagnetic valve (12), the automatic regulating valve (13), the check valve (14) and the air inlet and storing tank are sequentially connected; the air inlet temperature and pressure adjusting assembly (2) further comprises a quick-opening air inlet electromagnetic valve (34), a vacuum-proof negative pressure control valve (35), a second safety valve (37) and a second pressure relief electromagnetic valve (38) which are respectively arranged on the air inlet and air storage tank, and the quick-opening air inlet electromagnetic valve (34) and the vacuum-proof negative pressure control valve (35) are respectively arranged on the air inlet and air storage tank so as to prevent danger caused by instantaneous suction of a tank body; the second safety valve (37) and the second pressure relief electromagnetic valve (38) are both connected to a system vent and used for preventing explosion caused by tank overpressure in the air supplementing process.
2. An intake air adjusting apparatus for a closed-type performance test system of a reciprocating compressor as claimed in claim 1, wherein: the air inlet temperature and pressure adjusting assembly (2) further comprises a temperature fine-tuning heat exchanger (39), and the air inlet and air storage tank (30) is connected to the exhaust pipeline through the temperature fine-tuning heat exchanger (39).
3. An intake air adjusting apparatus for a closed-type performance test system of a reciprocating compressor according to any one of claims 1 to 2, wherein: the air supplementing assembly (1) comprises a first stop valve (21) and a dry filter (22), and the air supplementing compressor (23) is connected with the air supplementing air storage tank (15) sequentially through the dry filter (22) and the first stop valve (21).
4. An intake air adjusting apparatus for a closed-type performance test system of a reciprocating compressor as claimed in claim 3, wherein: the air supplementing assembly (1) further comprises a second stop valve (24) and a special working medium air supplementing cylinder (25), one end of the second stop valve (24) is connected to a pipeline between the air supplementing air storage tank (15) and the first stop valve (21), and the other end of the second stop valve is connected to the special working medium air supplementing cylinder (25); the first shut-off valve (21) is interlocked with the second shut-off valve (24), i.e. when the first shut-off valve (21) or the second shut-off valve (24) is open, the second shut-off valve (24) or the first shut-off valve (21) is closed.
5. An intake air adjusting apparatus for a closed-type performance test system of a reciprocating compressor according to any one of claims 1 to 2, wherein: the air supplementing assembly (1) further comprises a first temperature sensor (17), a first pressure sensor (18), a first safety valve (19) and a first pressure relief electromagnetic valve (20) which are respectively arranged on the air supplementing and storing tank (15); the first temperature sensor (17) and the first pressure sensor (18) are respectively used for detecting the temperature and the pressure of the gas in the air supplementing and storing tank (15); the first safety valve (19) and the first pressure relief electromagnetic valve (20) are both connected to the vent.
6. An intake air adjusting apparatus for a closed-type performance test system of a reciprocating compressor according to any one of claims 1 to 2, wherein: the air inlet temperature and pressure adjusting assembly (2) further comprises a second blow-down valve (31), a second temperature sensor (32) and a second pressure sensor (33) which are respectively arranged on the air inlet and air storage tank, and the second blow-down valve (31), the second temperature sensor (32) and the second pressure sensor (33) are respectively used for carrying out blow-down, temperature detection and pressure detection on the air inlet and air storage tank (30).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109751234B (en) * | 2019-01-14 | 2020-04-10 | 四川虹美智能科技有限公司 | Refrigerator compressor testing arrangement |
| CN109596340B (en) * | 2019-01-17 | 2024-05-24 | 深圳市质量安全检验检测研究院 | Additional backpressure type safety valve discharge side test device and test method thereof |
| CN110793800B (en) * | 2019-11-28 | 2021-05-25 | 中国科学院工程热物理研究所 | Air source device for closed type experiment system of compressor and control method of air source device |
| CN110793801B (en) * | 2019-11-28 | 2021-07-30 | 中国科学院工程热物理研究所 | Hybrid indirect cooling compressor experiment system |
| CN115467850A (en) * | 2022-10-14 | 2022-12-13 | 中国第一汽车股份有限公司 | Centrifugal air compressor characteristic test system and test method |
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