Compressor performance test system

Abstract

The utility model provides a compressor performance test system, which comprises a control device, the system is used for testing the performance of a compressor body, the control device is used for controlling the data change when the compressor body is tested, and the test system further comprises a test device and a test instrument. The testing device is connected with the compressor body and is used for conveying a testing medium to the compressor body and outputting the testing medium from the compressor body; the test instrument is connected with the test device and is used for reading data of a medium conveyed or output by the test device; and the test instrument is connected with the control device and transmits read data of the test device to the control device, so that performance parameters such as flow, shaft power and the like of the compressor are measured and monitored on line, manual operation links are reduced, the test efficiency is improved, the debugging period is shortened, and the measurement precision is relatively high.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressor testing, and particularly relates to a compressor performance testing system. Background Art

[0002] Currently, in industrial applications, compressors are widely used in the compression and transportation of gases. However, there are some limitations in existing compressor performance testing systems. For example, traditional testing methods usually require manual intervention and data processing, resulting in low testing efficiency, inaccurate data, and the inability to achieve real-time monitoring and remote control. In addition, with the improvement of industrial automation levels, the requirements for compressor performance testing systems are also getting higher and higher.

[0003] Therefore, it is necessary to propose a compressor performance testing system to solve the problems of low testing efficiency, high labor costs, and inaccurate data existing in the existing system. Summary of the Utility Model

[0004] The utility model proposes a compressor performance testing system, which reduces the manual operation links, improves the testing efficiency, shortens the debugging cycle, and at the same time meets the accuracy and reliability requirements of measurement data. When performing flow measurement, compared with pipeline flow meters, the measurement accuracy of the utility model is higher, and the applicable range is wide, which can be applied to the flow measurement of various media, with strong versatility. In addition, an improved orifice plate differential pressure method for measuring flow is adopted, which reduces the device installation requirements and calculation amount on the premise that the impact on the accuracy of measurement data is small, and has good guiding significance.

[0005] The technical solution of the utility model is realized as follows: a compressor performance testing system includes a control device. This system is used to test the performance of the compressor body. The control device is used to control the data change during the test of the compressor body. This testing system also includes a testing device and testing instruments; the testing device is connected to the compressor body and is used to transport the test medium to the compressor body and output the test medium from the compressor body; the testing instruments are connected to the testing device and are used to read the data of the test medium transported or output by the testing device; the testing instruments are connected to the control device and transmit the data of the testing device read to the control device.

[0006] As a preferred embodiment, the testing device includes an intake assembly and an exhaust assembly. The intake assembly is connected to the compressor body and is used to transport the test medium to the compressor body. The exhaust assembly is connected to the compressor body and is used to output the test medium from the compressor body.

[0007] As a preferred embodiment, the intake assembly includes a first intake pipe connected to the compressor body. One end of the first intake pipe opposite to the compressor body is connected to an intake muffler. One end of the intake muffler opposite to the first intake pipe is connected to a second intake pipe. The end of the second intake pipe is connected to an orifice plate.

[0008] As a preferred embodiment, an intake assembly support seat is fixedly arranged at the bottom of the intake muffler. An intake pressure regulating valve is arranged between the first intake pipe and the intake muffler.

[0009] As a preferred embodiment, the exhaust assembly includes a first exhaust pipe connected to the compressor body. One end of the first exhaust pipe opposite to the compressor body is connected to an exhaust muffler. One end of the exhaust muffler opposite to the first exhaust pipe is connected to a second exhaust pipe.

[0010] As a preferred embodiment, an exhaust assembly support seat is fixedly arranged at the bottom of the exhaust muffler. An exhaust pressure regulating valve is arranged between the first exhaust pipe and the exhaust muffler.

[0011] As a preferred embodiment, the test instruments include an atmospheric temperature and humidity meter, an atmospheric pressure gauge, an orifice plate differential pressure gauge, an intake pressure gauge, an intake temperature gauge, an exhaust pressure gauge, an exhaust temperature gauge, an oil pressure gauge, and an oil temperature gauge. The atmospheric temperature and humidity meter and the atmospheric pressure gauge are located on the side of the orifice plate away from the second intake pipe. The orifice plate differential pressure gauge is installed at the orifice plate. The intake pressure gauge and the intake temperature gauge are located between the first intake pipe and the compressor body. The oil pressure gauge and the oil temperature gauge are located at the compressor body. The exhaust pressure gauge and the exhaust temperature gauge are located at the second exhaust pipe.

[0012] As a preferred embodiment, the control device includes a motor, and the motor is connected to the compressor body.

[0013] As a preferred embodiment, the intake muffler and the exhaust muffler adopt impedance composite mufflers.

[0014] After adopting the above technical solutions, the beneficial effects of the present utility model are:

[0015] It can measure and perform on-line monitoring of performance parameters such as the flow rate and shaft power of the compressor. The system operation is simple and convenient, reducing the manual operation links, improving the test efficiency, shortening the commissioning cycle, and at the same time meeting the accuracy requirements of the measurement data;

[0016] Adopting an improved method of measuring flow rate by orifice plate differential pressure, on the premise of having little impact on the accuracy of the measurement data, it reduces the installation requirements and calculation amount of the device, and has a good guiding role. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 is a structural schematic diagram of the present invention;

[0019] Figure 2 is a structural schematic diagram of the test device in the present invention;

[0020] Figure 3 is a structural schematic diagram of another perspective of the test device of the present invention.

[0021] In the figure, 1 - compressor body; 2 - test device; 21 - orifice plate; 22 - first intake pipe; 23 - intake pressure regulating valve; 24 - intake muffler; 241 - intake component support seat; 25 - first exhaust pipe; 26 - exhaust muffler; 261 - exhaust component support seat; 27 - exhaust pressure regulating valve; 28 - second intake pipe; 29 - second exhaust pipe; 3 - test instrument; 31 - atmospheric temperature and humidity meter; 32 - atmospheric pressure gauge; 33 - orifice plate differential pressure gauge; 34 - intake pressure gauge; 35 - intake temperature gauge; 36 - exhaust pressure gauge; 37 - exhaust temperature gauge; 38 - oil pressure gauge; 39 - oil temperature gauge; 4 - control device; 45 - motor. Detailed implementation manners

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0023] Such as Figures 1 - 2As shown in the figure, a compressor performance test system includes a control device 4. This system is used to test the performance of the compressor body 1. The control device 4 is used to control the data change during the test of the compressor body 1. This test system also includes a test device 2 and a test instrument 3. The test device 2 is connected to the compressor body 1 and is used to transport the test medium to the compressor body 1 and output the test medium from the compressor body 1. The test instrument 3 is connected to the test device 2 and is used to read the data of the test medium transported or output by the test device 2. The test instrument 3 is connected to the control device 4 and transmits the data of the test device 2 read to the control device 4. The control device 4 includes a motor 45, and the motor 45 is connected to the compressor body 1.

[0024] The test device 2 includes an intake component and an exhaust component. The intake component is connected to the compressor body 1 and is used to transport the test medium to the compressor body 1. The exhaust component is connected to the compressor body 1 and is used to output the test medium from the compressor body 1.

[0025] The intake component includes a first intake pipe 22 connected to the compressor body 1. At the end of the first intake pipe 22 opposite to the compressor body 1, an intake silencer 24 is connected. At the end of the intake silencer 24 opposite to the first intake pipe 22, a second intake pipe 28 is connected. A orifice plate 21 is connected to the end of the second intake pipe 28. An intake component support base 241 is fixedly arranged at the bottom of the intake silencer 24. An intake pressure regulating valve 23 is arranged between the first intake pipe 22 and the intake silencer 24. The size of the orifice plate 21 conforms to the provisions of GB / T 2624. For compressor bodies 1 of different specifications and models, corresponding orifice plates 21 are adopted. The compressor performance test system adopts the improved differential pressure measurement flow method of the orifice plate 21. There is no pipe upstream of the orifice plate 21. The pressure on the upstream side of the orifice plate 21 is the atmospheric pressure. The pipe diameter on the upstream side of the orifice plate 21 tends to infinity. When calculating the flow rate, the discharge coefficient and the expansibility coefficient adopt fixed values and no iterative operation is required. The discharge coefficient is calculated by the Reader-Harris / Gallagher formula, and the discharge coefficient C = 0.5961. The expansibility coefficient is calculated according to the general empirical formula, and the expansibility coefficient ε = 1 - 0.351[1 - (p2 / p1) 1 / κ .

[0026] The exhaust component includes a first exhaust pipe 25 connected to the compressor body 1. At the end of the first exhaust pipe 25 opposite to the compressor body 1, an exhaust silencer 26 is connected. At the end of the exhaust silencer 26 opposite to the first exhaust pipe 25, a second exhaust pipe 29 is connected. An exhaust component support base 261 is fixedly arranged at the bottom of the exhaust silencer 26. An exhaust pressure regulating valve 27 is arranged between the first exhaust pipe 25 and the exhaust silencer 26.

[0027] The intake muffler 24 and the exhaust muffler 26 adopt impedance compound mufflers. The intake muffler 24 and the exhaust muffler 26 adopt impedance compound mufflers, which have the best noise reduction effect and relatively small pipe loss. Depending on the situation, a resistance muffler or a reactive muffler can also be used. When the test is placed in a soundproof room, the muffler may not be used either.

[0028] The test instrument 3 includes an atmospheric temperature and humidity meter 31, an atmospheric pressure gauge 32, an orifice differential pressure gauge 33, an intake pressure gauge 34, an intake temperature gauge 35, an exhaust pressure gauge 36, an exhaust temperature gauge 37, an oil pressure gauge 38, and an oil temperature gauge 39. The atmospheric temperature and humidity meter 31 and the atmospheric pressure gauge 32 are located on the side of the orifice 21 away from the second intake pipe 28. The orifice differential pressure gauge 33 is installed at the orifice 21. The intake pressure gauge 34 and the intake temperature gauge 35 are located between the first intake pipe 22 and the compressor body 1. The oil pressure gauge 38 and the oil temperature gauge 39 are located at the compressor body 1. The exhaust pressure gauge 36 and the exhaust temperature gauge 37 are located at the second exhaust pipe 29.

[0029] The compressor performance test system adopts an improved method for measuring the flow rate by the differential pressure of the orifice 21. There is no pipe provided upstream of the orifice 21. The pressure on the upstream side of the orifice 21 is the atmospheric pressure. The diameter of the upstream side of the orifice 21 tends to infinity. When calculating the flow rate, the discharge coefficient and the expansibility coefficient adopt fixed values and no iterative operation is required.

[0030] The test device 2 includes an orifice 21, a first intake pipe 22, a second intake pipe 28, an intake pressure regulating valve 23, an intake muffler 24, a first exhaust pipe 25, a second exhaust pipe 29, an exhaust muffler 26, an exhaust pressure regulating valve 27. The test instrument 3 includes an atmospheric temperature and humidity meter 31, an atmospheric pressure gauge 32, an orifice differential pressure gauge 33, an intake pressure gauge 34, an intake temperature gauge 35, an exhaust pressure gauge 36, an exhaust temperature gauge 37, an oil pressure gauge 38, an oil temperature gauge 39. The control device 4 includes a host computer, a PLC, a human-machine interface, an inverter, and a motor 45. Flange plates are provided on each component of the test device 2. The flange plates are fixedly connected by bolts. A flange gasket is provided between the flange plates. In order to connect and fix different test devices 2 and facilitate adjustment, at least one movable flange must be included in each pair of connected flanges. The intake pipe and the exhaust pipe should each have multiple pipe segments and also include elbows considering the on-site layout.

[0031] The test instruments 3 are all connected to the PLC. The atmospheric temperature and humidity meter 31, the intake air temperature meter 35, the exhaust air temperature meter 37, and the oil temperature meter 39 all have communication functions and are connected to the RS485 serial port. The communication method can adopt free format communication. If the motor 4545 also uses RS-485 communication, the same port parameters are configured and different communication addresses are set. The atmospheric pressure gauge 32, the orifice differential pressure gauge 33, the intake air pressure gauge 34, the exhaust air pressure gauge 36, and the oil pressure gauge 38 are all output through the analog quantity module. The PLC 42 is provided with an analog quantity expansion module to provide sufficient analog quantity output channels. The PLC is provided with an analog quantity expansion module.

[0032] The test systems are connected through cable lines and data lines. To ensure that the signals are not interfered, the cable lines of the test instruments 3 all use shielded wires. To improve the power factor on the input side of the frequency converter and suppress the high-order harmonic current, the test system should be equipped with an input reactor. To suppress the electromagnetic interference transmitted from the frequency converter to the public power grid through the input power line, the test system should be equipped with an input filter. To suppress the interference generated at the wiring point on the output side of the frequency converter, the test system should be equipped with an output filter. To extend the effective transmission distance of the frequency converter and suppress the instantaneous high voltage generated by the frequency converter, the test system should be equipped with an output reactor. The above are non-essential measures added to optimize the test system and can be adjusted by considering costs during actual application.

[0033] The test system should be equipped with components such as a circuit breaker, an emergency stop switch, and an indicator light. For the power supply of multiple electrical devices, the test system should be equipped with a transformer. The test system should be provided with an alarm. When the value of the test instrument 3 exceeds the set value, it should alarm and stop immediately. The above are essential measures added to ensure the safety and use of the test system and cannot be adjusted by considering costs during actual application.

[0034] The compressor performance test system reads the parameter values of the atmospheric temperature and humidity meter 31, the atmospheric pressure gauge 32, the orifice differential pressure gauge 33, the intake air pressure gauge 34, and the intake air temperature meter 35 for calculating the mass flow rate and the volume flow rate. If it is factory inspection, when the requirement for the flow test accuracy is not high, the mass flow rate and the volume flow rate are calculated according to the calculation method provided by GB / T 2624.2. When the requirement for the flow test accuracy is relatively high, the measured mass flow rate and volume flow rate should be added with a correction factor to remove the error influence caused by the change in the device structure.

[0035] The compressor performance test system reads the output voltage value, output current value, and power percentage value of the frequency converter to calculate the shaft power. The shaft power of the compressor body 1 can be obtained from the output voltage value, output current value, motor 45 efficiency, and power factor, or from the power percentage and rated power. The compressor performance test system reads the motor 45 speed of the frequency converter to calculate the volumetric efficiency. By confirming the speed ratio, the speed of the compressor body 1 is calculated, and then the volumetric efficiency can be obtained from the theoretical flow rate per revolution and the volume flow rate.

[0036] The parameters of the ambient temperature and humidity meter 31, intake temperature meter 35, exhaust temperature meter 37, and oil temperature meter 39 are directly read by the PLC. The analog parameters of the atmospheric pressure gauge 32, orifice differential pressure gauge 33, intake pressure gauge 34, exhaust pressure gauge 36, and oil pressure gauge 38 are converted into digital parameters by the PLC. Parameters such as mass flow rate, density, volume flow rate, shaft power, volumetric efficiency, and specific power are calculated through the calculation formula program written into the PLC. All the above parameters are displayed on the host computer and the human-machine interface.

[0037] The specific implementation method of the compressor performance test system is as follows: After confirming the compressor body, confirm that the motor 45 rotates in the correct direction. Install the test device 2 in sequence, connect and fix it with bolts, then install the test instrument 3, check the connection, check the test device 2 and the test instrument 3. After confirming that everything is correct, add lubricating oil to the compressor body and perform a turning inspection. Then turn on the test system, operate on the host computer or the human-machine interface, select the compressor body model and orifice plate 21. After confirming that the transmission mode, speed ratio and other parameters are correct, first perform a short-term trial operation. After everything is normal, perform a startup test. During the startup test, first adjust the motor 45 parameters. The frequency of the frequency converter is slowly adjusted from low frequency to the specified frequency, then adjust the exhaust pressure regulating valve 27, and adjust the exhaust pressure from low pressure to the specified pressure. Read the real-time flow rate, shaft power and other parameter information on the human-machine interface. After monitoring that the compressor body runs normally for a long time, stop the machine and turn the compressor by hand. The compressor performance test is completed.

[0038] The compressor performance test system reads the motor 45 speed of the frequency converter to calculate the volumetric efficiency.

[0039] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A compressor performance testing system, including a control device (4), the system is used to test the performance of the compressor body (1), and the control device (4) is used to control the data change when testing the compressor body (1), characterized in that, The test system further includes a test device (2) and a test instrument (3); The test device (2) is connected to the compressor body (1) and is used to convey a test medium to the compressor body (1) and output the test medium from the compressor body (1). The test device (2) includes an intake assembly and an exhaust assembly. The intake assembly is connected to the compressor body (1) and is used to convey the test medium to the compressor body (1). The exhaust assembly is connected to the compressor body (1) and is used to output the test medium from the compressor body (1); The test instrument (3) is connected to the test device (2) and is used to read the data of the medium conveyed or output by the test device (2). The test instrument (3) includes an atmospheric temperature and humidity meter (31), an atmospheric pressure gauge (32), an orifice plate differential pressure gauge (33), an intake pressure gauge (34), an intake temperature gauge (35), an exhaust pressure gauge (36), an exhaust temperature gauge (37), an oil pressure gauge (38), and an oil temperature gauge (39). The atmospheric temperature and humidity meter (31) and the atmospheric pressure gauge (32) are located on the side of the orifice plate (21) away from the second exhaust pipe (29). The orifice plate differential pressure gauge (33) is installed at the orifice plate (21). The intake pressure gauge (34) and the intake temperature gauge (35) are located between the first intake pipe (22) and the compressor body (1). The oil pressure gauge (38) and the oil temperature gauge (39) are located at the compressor body (1). The exhaust pressure gauge (36) and the exhaust temperature gauge (37) are located at the second exhaust pipe; The test instrument (3) is connected to the control device (4) and transmits the data of the test device (2) read to the control device (4); the control device (4) includes a motor (45), and the motor (45) is connected to the compressor body (1).

2. The compressor performance testing system according to claim 1, wherein, The intake assembly includes a first intake pipe (22) connected to the compressor body (1). One end of the first intake pipe (22) opposite to the compressor body (1) is connected to an intake muffler (24). One end of the intake muffler (24) opposite to the first intake pipe (22) is connected to a second exhaust pipe (29). The end of the second exhaust pipe (29) is connected to an orifice plate (21).

3. A compressor performance testing system according to claim 2, wherein An intake assembly support base (241) is fixedly arranged at the bottom of the intake muffler (24). An intake pressure regulating valve (23) is arranged between the first intake pipe (22) and the intake muffler (24).

4. A compressor performance testing system according to claim 2, wherein, The exhaust assembly includes a first exhaust pipe (25) connected to the compressor body (1). One end of the first exhaust pipe (25) opposite to the compressor body (1) is connected to an exhaust muffler (26). One end of the exhaust muffler (26) opposite to the first exhaust pipe (25) is connected to a second exhaust pipe.

5. A compressor performance test system according to claim 4, characterized in that, An exhaust assembly support base (261) is fixedly arranged at the bottom of the exhaust muffler (26). An exhaust pressure regulating valve (27) is arranged between the first exhaust pipe (25) and the exhaust muffler (26).

6. The compressor performance testing system according to claim 4, characterized in that, The intake muffler (24) and the exhaust muffler (26) adopt impedance composite mufflers.

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