Compressor volumetric efficiency testing device based on air medium

Abstract

The invention 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 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, a second oil-water separator and a supporting frame. In the invention, 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, complicated parts such as a condenser, an evaporator and an expansion valve are not needed, and the equipment design and manufacturing cost is reduced; the method has the advantages of simple operation, higher precision, no phase change problem of the air medium, simple test process, more stable data and higher measurement precision.

Description

Technical Field

[0001] The invention relates to the technical field of compressor performance detection, and in particular to a compressor volumetric efficiency testing device based on air medium. Background Art

[0002] Compressors are widely used in many industries, including refrigeration and air conditioning, pneumatic equipment, gas transportation, natural gas storage, etc. In these applications, the volumetric efficiency of the compressor directly affects its operating performance and energy consumption level. The volumetric efficiency refers to the ratio of the actual exhaust volume of the compressor to the theoretical exhaust volume, reflecting the gas transportation capacity of the compressor under given working conditions;

[0003] Traditional compressor volumetric efficiency testing technologies and methods include the following:

[0004] Refrigerant medium method: a volumetric efficiency test method that uses a refrigerant (such as Freon, ammonia or carbon dioxide) as the medium. In this method, a complete refrigeration cycle system needs to be established, including equipment such as compressors, condensers, evaporators and expansion valves. The test process determines the performance of the compressor by monitoring the flow and state changes (such as phase change, pressure, temperature, etc.) of the refrigerant between different devices. The main disadvantage of this method is that the equipment system is complex, involving multiple key components, and the installation and commissioning are time-consuming and labor-intensive; at the same time, the state of the refrigerant (such as phase change) needs to be precisely controlled, which increases the uncertainty and difficulty of the test. In addition, due to the complex physical and chemical changes of the refrigerant under different operating points, the test process is greatly affected by environmental factors, and the accuracy is not easy to guarantee;

[0005] Gas displacement method: Displace a known volume of gas into the compressor to measure its volumetric efficiency. This method is relatively simple to operate, but due to the fluidity and uncertainty of the gas displacement process, the accuracy of the results may be affected;

[0006] Computational simulation method: The volumetric efficiency is calculated based on the design parameters of the compressor and the fluid dynamics model through computer simulation technology. This method does not require physical testing equipment, but the accuracy of the results depends on the complexity and assumptions of the model and cannot fully reflect the actual working conditions;

[0007] The traditional compressor volumetric efficiency test technology has the following problems:

[0008] 1. Complex equipment and high cost: The test method using refrigerant as the medium requires a complete refrigeration cycle system, including multiple components such as compressor, condenser, evaporator, expansion valve, etc., which leads to complex equipment system, high design and manufacturing costs, and difficulty in maintenance and operation;

[0009] 2. Strict operation and environmental requirements: Refrigerant testing requires precise control of the phase change process of the refrigerant and the temperature, pressure and other parameters in the system. This testing process has high requirements on the professional skills of the operator and is easily disturbed by external environmental conditions (such as temperature fluctuations, humidity changes, etc.), which makes the test repeatability and stability poor;

[0010] 3. Poor flexibility and limited test conditions: Traditional refrigerant testing methods can usually only be used to measure at specific operating points when the compressor reaches a stable operating state. It is difficult to flexibly adjust the test parameters to cover a variety of operating points. In addition, this test method cannot simulate the operating performance of the compressor under non-standard conditions, which limits the comprehensiveness and diversity of the test.

[0011] 4. High time and cost consumption: The refrigerant needs to undergo a complex phase change process in the system, the test cycle is long, and the time and resource costs are high. In addition, the price fluctuations of refrigerants and environmental safety management may also bring additional operating costs and restrictions;

[0012] In view of the above problems, the inventor proposes a compressor volumetric efficiency testing device based on air medium to solve the above problems. Summary of the invention

[0013] In order to solve the above-mentioned problems, the object of the present invention is to provide a compressor volumetric efficiency testing device based on air medium.

[0014] In order to solve the above technical problems, the present invention adopts the following technical scheme: a compressor volumetric efficiency test device based on air medium, the test device comprises a No. 1 air storage tank, a motor, a pulley group, a No. 1 pressure reducing valve, a No. 2 pressure reducing valve, a No. 3 pressure reducing valve, an oil storage tank, a No. 2 air storage tank, a No. 3 air storage tank, a No. 1 oil-water separator, a No. 2 oil-water separator and a support frame, the motor, the No. 1 pressure reducing valve, the No. 2 pressure reducing valve, the No. 3 pressure reducing valve, the oil storage tank, the No. 2 air storage tank, the No. 3 air storage tank, the No. 1 oil-water separator and the No. 2 oil-water separator are assembled on the support frame;

[0015] The driving output end of the motor is connected to the pulley group in a driving manner, the outlet of the No. 1 gas tank is connected to the No. 1 pressure reducing valve and the No. 2 pressure reducing valve respectively through pipelines, the No. 3 pressure reducing valve is connected to the inlet of the oil tank through a pipeline, the outlet of the No. 2 gas tank is connected to the No. 1 oil-water separator, the outlet of the No. 3 gas tank is connected to the No. 2 oil-water separator, the air outlet of the No. 1 oil-water separator is connected to the air inlet of the No. 1 pressure reducing valve through a pipeline, and the air outlet of the No. 2 oil-water separator is connected to the air inlet of the No. 2 pressure reducing valve through a pipeline.

[0016] Preferably, the driving output end of the motor is equipped with a gearbox, and one shaft of the pulley assembly is fixedly connected to the driving shaft of the gearbox.

[0017] Preferably, a frame plate is mounted on the support frame, and two shafts of the pulley assembly are rotatably arranged on one side of the frame plate.

[0018] Preferably, an assembly seat is fixedly provided on the frame plate, and a plurality of evenly distributed assembly holes are opened on the assembly seat.

[0019] Preferably, the bottom of the support frame is equipped with a plurality of evenly distributed universal wheels.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. In the present invention, through the combination of the No. 1 gas storage tank, the motor, the pulley group, the No. 1 pressure reducing valve, the No. 2 pressure reducing valve, the No. 3 pressure reducing valve, the oil storage tank, the No. 2 gas storage tank, the No. 3 gas storage tank, the No. 1 oil-water separator, and the No. 2 oil-water separator, the equipment is simplified and the cost is reduced. There is no need for complex components such as condensers, evaporators, and expansion valves, thereby reducing the equipment design and manufacturing costs;

[0022] 2. In the present invention, the compressor body is tested by a combination of a No. 1 gas tank, a motor, a pulley group, a No. 1 pressure reducing valve, a No. 2 pressure reducing valve, a No. 3 pressure reducing valve, an oil storage tank, a No. 2 gas tank, a No. 3 gas tank, a No. 1 oil-water separator, and a No. 2 oil-water separator. The operation is simple, the accuracy is higher, there is no phase change problem in the air medium, the test process is simple, the data is more stable, and the measurement accuracy is higher;

[0023] 3. The present invention can flexibly adapt to various working conditions, is not limited by the phase change temperature of the refrigerant, can be tested under various working conditions, and is suitable for different types of compressors. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 The figure is a schematic diagram of the overall structure of a compressor volumetric efficiency testing device based on air medium according to the present invention.

[0026] Figure 2 It is a schematic diagram of the composition structure of the testing device of the present invention.

[0027] Figure 3 It is a schematic structural diagram of the compressor body and the motor of the present invention.

[0028] In the figure: 1. No. 1 gas 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 storage tank; 10. No. 2 gas tank; 11. No. 3 gas tank; 12. No. 1 oil-water separator; 13. No. 2 oil-water separator; 14. Support frame; 15. Universal wheel; 16. Frame plate; 17. Assembly seat; 18. Assembly hole. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example: Figure 1-3 As shown, the present invention provides a compressor volumetric efficiency test device based on air medium, the test device comprises a No. 1 gas storage tank 1, a motor 2, a pulley group 4, a No. 1 pressure reducing valve 6, a No. 2 pressure reducing valve 7, a No. 3 pressure reducing valve 8, an oil storage tank 9, a No. 2 gas storage tank 10, a No. 3 gas storage tank 11, a No. 1 oil-water separator 12, a No. 2 oil-water separator 13 and a support frame 14, the motor 2, the No. 1 pressure reducing valve 6, the No. 2 pressure reducing valve 7, the No. 3 pressure reducing valve 8, the oil storage tank 9, the No. 2 gas storage tank 10, the No. 3 gas storage tank 11, the No. 1 oil-water separator 12 and the No. 2 oil-water separator 13 are assembled on the support frame 14, and the bottom of the support frame 14 is equipped with a plurality of evenly distributed universal wheels 15, and the universal wheels 15 are arranged to facilitate the overall movement of the test device, and the use is convenient;

[0031] The driving output end of the motor 2 is transmission-connected with the pulley group 4, and the driving output end of the motor 2 is equipped with a gearbox 3, one of the shafts of the pulley group 4 is fixedly connected to the driving shaft of the gearbox 3, and a frame plate 16 is installed on the support frame 14, two shafts of the pulley group 4 are rotatably arranged on one side of the frame plate 16, and the other shaft of the pulley group 4 is fixedly connected to the rotating wheel shaft of the compressor body 5. By setting the gearbox 3, when the motor 2 starts to work, the gearbox 3 is used to achieve a constant speed in the test working condition, and the pulley group 4 drives the rotating shaft wheel of the compressor body 5 to rotate, so that the wheel of the compressor body 5 rotates, and the outlet of the No. 1 gas storage tank 1 is respectively connected to the No. 1 pressure reducing valve 6 and the No. 2 pressure reducing valve 7 through pipelines. By setting the No. 1 gas storage tank 1, when the external compressed air is connected to the inlet of the No. 1 gas storage tank 1, the external compressed air can be stored in the No. 1 gas storage tank 1, and the outlets of the No. 1 pressure reducing valve 6 and the No. 2 pressure reducing valve 7 are connected to the air inlet of the compressor body 5 through pipelines. The outlet is connected to the No. 1 pressure reducing valve 6 and the No. 2 pressure reducing valve 7, and the intake air pressure entering the compressor body 5 is adjusted by the size of the No. 1 pressure reducing valve 6 and the No. 2 pressure reducing valve 7. The No. 3 pressure reducing valve 8 is connected to the inlet of the oil storage tank 9 through a pipeline. The outlet of the No. 2 gas storage tank 10 is connected to the No. 1 oil-water separator 12. The outlet of the No. 3 gas storage tank 11 is connected to the No. 2 oil-water separator 13. The outlet of the compressor body 5 is connected to the inlets of the No. 2 gas storage tank 10 and the No. 3 gas storage tank 11 through pipelines. By setting up a No. 3 pressure reducing valve 8 and an oil storage tank 9, the continuous oil supply to the inlet of the compressor body 5 is achieved by utilizing the air pressure difference between the No. 3 pressure reducing valve 8 and the No. 1 pressure reducing valve 6 and the No. 2 pressure reducing valve 7. The oil supply rate is adjusted by the gas pressure difference between the No. 1 pressure reducing valve 6, the No. 2 pressure reducing valve 7 and the No. 3 pressure reducing valve 8. The air outlet of the No. 1 oil-water separator 12 is connected to the air inlet of the No. 1 pressure reducing valve 6 through a pipeline, and the air outlet of the No. 2 oil-water separator 13 is connected to the air inlet of the No. 2 pressure reducing valve 7 through a pipeline.

[0032] An assembly seat 17 is fixedly provided on the frame plate 16, and a plurality of evenly distributed assembly holes 18 are opened on the assembly seat 17. The base of the compressor body 5 can be detachably assembled on the frame plate 16 through the assembly holes 18 and the assembly seat 17. By providing the assembly seat 17 and the assembly holes 18, it is convenient to assemble the compressor body 5 on the support frame 14 for testing.

[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, boards and PC acquisition are arranged at the inlet and outlet of the compressor body 5 to capture the inlet temperature, outlet temperature, inlet pressure, outlet pressure and inlet flow of the compressor body 5. The oscilloscope captures the current and voltage during the operation of the motor 2, and the actual exhaust volume / theoretical exhaust volume formula is used to calculate the volumetric efficiency of the compressor body 5 under air medium and different speed conditions;

[0034] Then start the motor 2, and achieve a constant speed in the test condition through the gearbox 3. The pulley group 4 drives the rotating shaft wheel of the compressor body 5 to rotate, so that the wheel of the compressor body 5 rotates. At the same time, the No. 1 pressure reducing valve 6, the No. 2 pressure reducing valve 7 and the No. 3 pressure reducing valve 8 adjust and continuously supply the air and lubricating oil required for the test, and the compressor body 5 starts to work normally and discharges high-temperature and high-pressure air. The No. 1 pressure reducing valve 6, the No. 2 pressure reducing valve 7 and the No. 3 pressure reducing valve 8 control the outlet pressure change rate. The air reaches the No. 2 air storage tank 10 and the No. 3 air storage tank 11 from the outlet of the compressor body 5, and the gas oil in the air is separated from the air through the No. 1 oil-water separator 12 and the No. 2 oil-water separator 13. The lubricating oil is stored in the No. 1 oil-water separator 12 and the No. 2 oil-water separator 13. The air returns to the No. 1 pressure reducing valve 6 and the No. 2 pressure reducing valve 7 and continues to supply air to the inlet of the compressor body 5 together with the air in the No. 1 air storage tank 1 to realize gas circulation.

[0035] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A compressor volumetric efficiency test device based on air medium, characterized in that: The testing device comprises a No. 1 gas storage tank (1), a motor (2), a pulley group (4), a No. 1 pressure reducing valve (6), a No. 2 pressure reducing valve (7), a No. 3 pressure reducing valve (8), an oil storage tank (9), a No. 2 gas storage tank (10), a No. 3 gas storage tank (11), a No. 1 oil-water separator (12), a No. 2 oil-water separator (13) and a support frame (14); the motor (2), the No. 1 pressure reducing valve (6), the No. 2 pressure reducing valve (7), the No. 3 pressure reducing valve (8), the oil storage tank (9), the No. 2 gas storage tank (10), the No. 3 gas storage tank (11), the No. 1 oil-water separator (12) and the No. 2 oil-water separator (13) are assembled on the support frame (14); The driving output end of the motor (2) is connected to the pulley group (4) in a transmission manner; the outlet of the No. 1 gas storage tank (1) is connected to the No. 1 pressure reducing valve (6) and the No. 2 pressure reducing valve (7) through pipelines respectively; the No. 3 pressure reducing valve (8) is connected to the inlet of the oil storage tank (9) through a pipeline; the outlet of the No. 2 gas storage tank (10) is connected to the No. 1 oil-water separator (12); the outlet of the No. 3 gas storage tank (11) is connected to the No. 2 oil-water separator (13); the air outlet of the No. 1 oil-water separator (12) is connected to the air inlet of the No. 1 pressure reducing valve (6) through a pipeline; and the air outlet of the No. 2 oil-water separator (13) is connected to the air inlet of the No. 2 pressure reducing valve (7) through a pipeline.

2. A compressor volumetric efficiency test device based on air medium as claimed in claim 1, characterized in that: The drive output end of the motor (2) is equipped with a gearbox (3), and one shaft of the pulley set (4) is fixedly connected to the drive shaft of the gearbox (3).

3. A compressor volumetric efficiency test device based on air medium as claimed in claim 1, characterized in that: The support frame (14) is equipped with a frame plate (16), and two shafts of the pulley group (4) are rotatably arranged on one side of the frame plate (16).

4. A compressor volumetric efficiency test device based on air medium as claimed in claim 3, characterized in that: An assembly seat (17) is fixedly arranged on the frame plate (16), and a plurality of evenly distributed assembly holes (18) are opened on the assembly seat (17).

5. A compressor volumetric efficiency test device based on air medium as claimed in claim 1, characterized in that: The bottom of the support frame (14) is equipped with a plurality of evenly distributed universal wheels (15).

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