Compressor volumetric efficiency testing device based on air medium

Abstract

The utility model discloses a compressor volumetric efficiency testing device based on an air medium, and relates to the technical field of compressor performance detection. The device comprises a first gas storage tank, a motor, a belt pulley group, a first pressure reducing valve, a second pressure reducing valve, a third pressure reducing valve, an oil storage tank, a second gas storage tank, a third gas storage tank, a first oil-water separator, a second oil-water separator and a support frame, according to the utility model, through the combination of the first gas storage tank, the motor, the belt pulley set, the first pressure reducing valve, the second pressure reducing valve, the third pressure reducing valve, the oil storage tank, the second gas storage tank, the third gas storage tank, the first oil-water separator and the second oil-water separator, the equipment is simplified, the cost is reduced, and complicated parts such as a condenser, an evaporator and an expansion valve are not needed; equipment design and manufacturing cost is reduced, operation is simple, precision is higher, air media have no phase change problem, the testing process is simple, data are more stable, and measuring precision is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to a compressor performance detection technical field, concretely is a kind of compressor volumetric efficiency testing device based on air medium. BACKGROUND

[0002] Compressor is widely used in multiple industries, including refrigeration and air conditioning, pneumatic equipment, gas delivery, natural gas storage etc., in these applications, the volumetric efficiency of compressor directly influences its running effect and energy consumption level, volumetric efficiency refers to the ratio of actual discharge volume and theoretical discharge volume of compressor, reflects the gas delivery capacity of compressor under given working condition;

[0003] Traditional compressor volumetric efficiency testing technology and method include the following several kinds:

[0004] Refrigerant medium method: using refrigerant (such as freon, ammonia or carbon dioxide) as medium volumetric efficiency test method. In this method, a complete refrigeration cycle system needs to be established, including compressor, condenser, evaporator and expansion valve etc. Equipment. Test process determines the performance of compressor by monitoring the flow and state change (such as phase change, pressure, temperature etc.) of refrigerant between different equipment. The main disadvantage of this method is that the equipment system is complex, involves multiple key components, and installation and debugging is time-consuming and laborious;At the same time, the state (such as phase change) of refrigerant needs to be accurately controlled, which increases the uncertainty and difficulty of test. In addition, due to the complex physical and chemical changes of refrigerant under different working points, the test process is greatly affected by environmental factors, and the precision is not easy to guarantee;

[0005] Gas displacement method: known volume of gas is displaced into compressor, and its volumetric efficiency is measured. This method is relatively simple to operate, but due to the flow and uncertainty in gas displacement process, the accuracy of the result may be affected;

[0006] Computational simulation method: through computer simulation technology, based on the design parameters and fluid dynamics model of compressor to calculate volumetric efficiency. This method does not need physical test equipment, but the precision of its result depends on the complexity of model and assumption condition, and cannot completely reflect actual working condition;

[0007] Traditional compressor volumetric efficiency testing technology has the following problems:

[0008] 1、Equipment is complex and cost is high: the test method using refrigerant as medium needs complete refrigeration cycle system, including compressor, condenser, evaporator, expansion valve etc. Multiple components, resulting in complex equipment system, high design and manufacturing cost, and great difficulty in maintenance and operation;

[0009] 2. Strict operation and environmental requirements: The refrigerant test requires accurate control of the phase change process of the refrigerant and the temperature, pressure and other parameters in the system. This test process has high requirements for the professional skills of the operating personnel, and is easily disturbed by external environmental conditions (such as temperature fluctuations, humidity changes, etc.), making the repeatability and stability of the test poor;

[0010] 3. Poor flexibility, limited test working conditions: The traditional refrigerant test method can usually only be measured at a specific working condition point when the compressor reaches a stable operating state, and it is difficult to flexibly adjust the test parameters to cover multiple working condition points. This test method cannot simulate the operating performance of the compressor under non-standard working conditions, limiting the comprehensiveness and diversity of the test;

[0011] 4. Large time and cost consumption: The refrigerant needs to go through a complex phase change process in the system, the test period is long, and the time and resource cost is high. In addition, the price fluctuation and environmental safety management of the refrigerant may also bring additional operating costs and restrictions;

[0012] To solve the above problems, the utility model provides a compressor volumetric efficiency test device based on air medium for solving the above problems. Utility model content

[0013] In order to solve the above problems; The utility model discloses a compressor volumetric efficiency test device based on air medium.

[0014] To solve the above technical problems, the utility model adopts the following technical scheme: a compressor volumetric efficiency test device based on air medium, the test device includes a gas tank, a motor, a belt pulley set, a first pressure reducing valve, a second pressure reducing valve, a third pressure reducing valve, an oil tank, a second gas tank, a third gas tank, a first oil-water separator, a second oil-water separator and a support frame, the motor, the first pressure reducing valve, the second pressure reducing valve, the third pressure reducing valve, the oil tank, the second gas tank, the third gas tank, the first oil-water separator and the second oil-water separator are assembled on the support frame.

[0015] The drive output end of the motor and the belt pulley set are transmissionally connected, the outlet of the first gas tank is connected with the first pressure reducing valve and the second pressure reducing valve through pipelines respectively, the third pressure reducing valve is communicated with the inlet of the oil tank through a pipeline, the outlet of the second gas tank is communicated with the first oil-water separator, the outlet of the third gas tank is communicated with the second oil-water separator, the gas outlet of the first oil-water separator is communicated with the gas inlet of the first pressure reducing valve through a pipeline, and the gas outlet of the second oil-water separator is communicated with the gas inlet of the second pressure reducing valve through a pipeline.

[0016] Preferably, the drive output end of the motor is provided with a gearbox, and one shaft of the belt pulley set is fixedly connected with the drive shaft of the gearbox.

[0017] Preferably, a rack plate is assembled on the support frame, and two shafts of the belt pulley set are rotatably arranged on one side of the rack plate.

[0018] Preferably, an assembly seat is fixedly arranged on the rack plate, and a plurality of assembly holes are uniformly arranged on the assembly seat.

[0019] Preferably, a plurality of universal wheels are uniformly arranged on the bottom of the support frame.

[0020] Compared with the prior art, the utility model has the beneficial effects that:

[0021] 1、The utility model discloses a combination of a first gas storage tank, a motor, a belt pulley set, a first pressure reducing valve, a second pressure reducing valve, a third pressure reducing valve, an oil storage tank, a second gas storage tank, a third gas storage tank, a first oil-water separator and a second oil-water separator, which simplifies the equipment and reduces the cost, and does not need complex components such as a condenser, an evaporator and an expansion valve, thereby reducing the design and manufacturing costs of the equipment.

[0022] 2、The utility model discloses a combination of a first gas storage tank, a motor, a belt pulley set, a first pressure reducing valve, a second pressure reducing valve, a third pressure reducing valve, an oil storage tank, a second gas storage tank, a third gas storage tank, a first oil-water separator and a second oil-water separator for testing the compressor body, which is simple to operate, has higher precision, has no phase change problem of air medium, has a simple testing process, more stable data and higher measurement precision.

[0023] 3、The utility model discloses a flexible adaptation to various working conditions, no restriction on the phase change temperature of refrigerant, testing at various working points, and applicable to different types of compressors. DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Fig. 1 It is a whole structure schematic view of the utility model discloses a kind of compressor volumetric efficiency test device based on air medium.

[0026] Fig. 2 It is the component structure schematic view of the utility model test device.

[0027] Fig. 3 It is the structure schematic view of the utility model compressor body and motor.

[0028] In the diagram: 1. No. 1 air tank; 2. Motor; 3. Gearbox; 4. Pulley assembly; 5. Compressor body; 6. No. 1 pressure reducing valve; 7. No. 2 pressure reducing valve; 8. No. 3 pressure reducing valve; 9. Oil tank; 10. No. 2 air tank; 11. No. 3 air tank; 12. No. 1 oil-water separator; 13. No. 2 oil-water separator; 14. Support frame; 15. Casters; 16. Frame plate; 17. Assembly base; 18. Assembly hole. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Example: Figs. 1-3 As shown, this utility model provides a compressor volumetric efficiency testing device based on air medium. The testing device includes a first air tank 1, a motor 2, a pulley group 4, a first pressure reducing valve 6, a second pressure reducing valve 7, a third pressure reducing valve 8, an oil tank 9, a second air tank 10, a third air tank 11, a first oil-water separator 12, a second oil-water separator 13, and a support frame 14. The motor 2, the first pressure reducing valve 6, the second pressure reducing valve 7, the third pressure reducing valve 8, the oil tank 9, the second air tank 10, the third air tank 11, the first oil-water separator 12, and the second oil-water separator 13 are assembled on the support frame 14. The bottom of the support frame 14 is equipped with several evenly distributed casters 15. By setting the casters 15, the overall movement of the testing device is convenient and easy to use.

[0031] The driving output end of the motor 2 is in transmission connection with the pulley set 4, the driving output end of the motor 2 is equipped with a gearbox 3, one of the shafts of the pulley set 4 is fixedly connected with the driving shaft of the gearbox 3, the support frame 14 is equipped with a rack plate 16, two shafts of the pulley set 4 are rotatably arranged on one side of the rack plate 16, the other shaft of the pulley set 4 is fixedly connected with the rotating shaft of the compressor body 5, through the setting of the gearbox 3, when the motor 2 starts to work, the constant rotating speed of the test working condition is realized through the gearbox 3, the pulley set 4 drives the rotating shaft of the compressor body 5 to rotate, so that the rotating shaft of the compressor body 5 rotates, the outlet of the first gas storage tank 1 is connected with a first pressure reducing valve 6 and a second pressure reducing valve 7 through pipelines, through the setting of the first gas storage tank 1, when the external compressed air is communicated with the inlet of the first gas storage tank 1, the external compressed air can be stored in the first gas storage tank 1, the outlets of the first pressure reducing valve 6 and the second pressure reducing valve 7 are communicated with the air inlet of the compressor body 5 through pipelines, the outlet of the first gas storage tank 1 is connected with the first pressure reducing valve 6 and the second pressure reducing valve 7, and the air pressure entering the air inlet of the compressor body 5 is adjusted through the sizes of the first pressure reducing valve 6 and the second pressure reducing valve 7, a third pressure reducing valve 8 is communicated with the inlet of an oil storage tank 9 through a pipeline, the outlet of a second gas storage tank 10 is communicated with a first oil-water separator 12, the outlet of a third gas storage tank 11 is communicated with a second oil-water separator 13, the outlet of the compressor body 5 is communicated with the inlets of the second gas storage tank 10 and the third gas storage tank 11 through pipelines, through the setting of the third pressure reducing valve 8 and the oil storage tank 9, the continuous oil supply of the inlet of the compressor body 5 is realized by using the air pressure differential between the third pressure reducing valve 8 and the first pressure reducing valve 6 and the second pressure reducing valve 7, the oil supply rate is adjusted by the air pressure differential between the first pressure reducing valve 6, the second pressure reducing valve 7 and the third pressure reducing valve 8, the air outlet of the first oil-water separator 12 is communicated with the air inlet of the first pressure reducing valve 6 through a pipeline, and the air outlet of the second oil-water separator 13 is communicated with the air inlet of the second pressure reducing valve 7 through a pipeline.

[0032] The rack plate 16 is fixedly provided with an assembly seat 17, a plurality of assembly holes 18 are uniformly arranged on the assembly seat 17, the base of the compressor body 5 is detachably assembled on the rack plate 16 through the assembly holes 18 and the assembly seat 17, and the compressor body 5 is assembled on the support frame 14 through the assembly seat 17 and the assembly holes 18, so that the compressor body 5 is convenient to assemble on the support frame 14 for test.

[0033] Working principle: when the compressor body 5 needs to be tested, the compressor body 5 is first assembled on the support frame 14, and pressure sensors, flow sensors, temperature sensors, oscilloscopes, board cards and PC collectors are arranged at the inlet and outlet of the compressor body 5, the inlet temperature, outlet temperature, inlet pressure, outlet pressure and inlet flow of the compressor body 5 are grabbed, the current and voltage of the motor 2 in the running process are grabbed by the oscilloscope, and the volumetric efficiency of the compressor body 5 under different rotating speeds in the air medium is calculated by using the actual exhaust volume / theoretical exhaust volume formula.

[0034] Then the motor 2 is started, the test working condition constant speed is realized through the gearbox 3, the pulley set 4 drives the rotating shaft wheel of the compressor body 5 to rotate, the wheel of the compressor body 5 rotates, simultaneously, the air and the lubricating oil quantity required by the test are adjusted and continuously supplied through the first pressure reducing valve 6, the second pressure reducing valve 7 and the third pressure reducing valve 8, the compressor body 5 starts normal work and discharges high-temperature and high-pressure air, the first pressure reducing valve 6, the second pressure reducing valve 7 and the third pressure reducing valve 8 control the outlet pressure change rate, the air reaches the second air tank 10 and the third air tank 11 from the outlet of the compressor body 5, and the gas oil in the air is separated from the air through the first oil-water separator 12 and the second oil-water separator 13, the lubricating oil is stored in the first oil-water separator 12 and the second oil-water separator 13, the air returns to the first pressure reducing valve 6 and the second pressure reducing valve 7 and continues to supply air for the inlet of the compressor body 5 together with the air in the first air tank 1 to realize gas circulation.

[0035] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the claims of the present application and the equivalent technologies thereof, the present application also intends to include these modifications and variations.

Claims

1. An air medium based compressor volumetric efficiency testing device characterized by: The test device comprises a first gas tank (1), a motor (2), a belt pulley set (4), a first pressure reducing valve (6), a second pressure reducing valve (7), a third pressure reducing valve (8), an oil tank (9), a second gas tank (10), a third gas tank (11), a first oil-water separator (12), a second oil-water separator (13) and a support frame (14), wherein the motor (2), the first pressure reducing valve (6), the second pressure reducing valve (7), the third pressure reducing valve (8), the oil tank (9), the second gas tank (10), the third gas tank (11), the first oil-water separator (12) and the second oil-water separator (13) are assembled on the support frame (14). The driving output end of the motor (2) is in transmission connection with the belt pulley set (4), the outlet of the first gas tank (1) is connected with the first pressure reducing valve (6) and the second pressure reducing valve (7) through pipelines, the third pressure reducing valve (8) is in communication with the inlet of the oil tank (9) through a pipeline, the outlet of the second gas tank (10) is in communication with the first oil-water separator (12), the outlet of the third gas tank (11) is in communication with the second oil-water separator (13), the gas outlet of the first oil-water separator (12) is in communication with the gas inlet of the first pressure reducing valve (6) through a pipeline, and the gas outlet of the second oil-water separator (13) is in communication with the gas inlet of the second pressure reducing valve (7) through a pipeline.

2. An air medium based compressor volumetric efficiency testing device as claimed in claim 1 wherein, The driving output end of the motor (2) is provided with a gearbox (3), and one shaft of the belt pulley set (4) is fixedly connected with the driving shaft of the gearbox (3).

3. An air medium based compressor volumetric efficiency testing device as claimed in claim 1 wherein, The support frame (14) is provided with a rack plate (16), and two shafts of the belt pulley set (4) are rotatably arranged on one side of the rack plate (16).

4. An air medium based compressor volumetric efficiency testing device as claimed in claim 3 wherein, The rack plate (16) is fixedly provided with an assembly seat (17), and a plurality of assembly holes (18) are uniformly arranged in the assembly seat (17).

5. An air medium based compressor volumetric efficiency testing device as claimed in claim 1 wherein, The bottom of the support frame (14) is provided with a plurality of universal wheels (15) which are uniformly arranged.

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