Compressor performance test platform and test method

Abstract

The present invention relates to a compressor performance test platform, comprising an air circulation system including a compressor system to be tested; the air circulation system is located in the exhaust section after the compressor system to be tested and no pressure reducing valve is arranged; the exhaust section after the compressor system to be tested is provided with a first relief pipeline connected with a relief main pipe; a pneumatic valve is arranged on the first relief pipeline, and a flow blocking structure is arranged between the pneumatic valve and the relief main pipe; a first pressure transmitter for monitoring pressure and feeding back electrical signals to a control center is arranged at the front end of the pneumatic valve, and the control center forms a control of the opening and closing / opening degree of the pneumatic valve according to the electrical signal.

Description

Technical Field

[0001] The invention relates to a compressor performance test platform and a test method, and belongs to the technical field of compressor performance test. Background Art

[0002] The existing hydrogen compressor test equipment can basically implement some tests on the compressor performance. When performing reflux, the common operation is to use a pressure reducing valve to reduce the pressure of hydrogen in the pipeline. This method has the following problems:

[0003] First, the pressure after the compressor is high and the flow rate is large, which places high demands on the pressure reducing valve, and the cost will increase accordingly. Secondly, different compressor parameters have different requirements on the pressure reducing valve. It is necessary to adjust the parameters of the pressure reducing valve or even replace the model according to the performance parameters of the object being tested, and the versatility is not high. Finally, the pressure after the pressure reducing valve needs to be adjusted during the test, and the pressure after the valve needs to be checked for each test, which makes the operation more cumbersome. Summary of the invention

[0004] The purpose of the present invention is to provide a compressor performance test platform and test method, which eliminates the pressure reducing valve and adds a flow blocking structure. The flow blocking structure does not require manual operation in the later stage except for the early design calculation and verification, and is not affected by the pressure flow at the rear end of the compressor. The purpose of reducing costs, increasing versatility and reducing manual operation is achieved.

[0005] The present invention adopts the following technical solutions:

[0006] A compressor performance testing platform comprises an air circulation system including a compressor system 13 to be tested; the air circulation system is located in the exhaust section after the compressor system 13 to be tested and no pressure reducing valve is arranged; the exhaust section after the compressor system 13 to be tested is provided with a first relief pipeline connected to a relief main pipe 23; a pneumatic valve 17 is arranged on the first relief pipeline, and a flow blocking structure 18 is arranged between the pneumatic valve 17 and the relief main pipe 23; a first pressure transmitter 21 for monitoring pressure and feeding back electrical signals to a control center is arranged at the front end of the pneumatic valve 17, and the control center controls the opening and closing / opening degree of the pneumatic valve 17 according to the electrical signals.

[0007] Preferably, the first relief pipeline is also arranged in parallel with a safety pipeline, and an outlet safety valve 22 is provided on the safety pipeline.

[0008] Preferably, a first manual needle valve 15 and an exhaust buffer tank 16 are provided in sequence between the tested compressor system 13 and the first exhaust pipeline.

[0009] Preferably, the suction section before the tested compressor system 13 is provided with a second discharge pipeline connected to the discharge main pipe 23, the second discharge pipeline is provided with a second manual needle valve 8, and the front end of the second manual needle valve 8 is provided with a second pressure transmitter 11 for monitoring the pressure.

[0010] Preferably, the air circulation system is provided with an air intake buffer tank 5 and a mass flow meter 6 in sequence within the air intake section before the compressor system 13 to be tested.

[0011] Preferably, it also includes an air intake pipeline 4 connected to the air circulation system, and the air intake pipeline 4 is provided with an inlet pressure reducing valve 1, a first one-way valve 2, and a third manual needle valve 3 in sequence from front to back.

[0012] Preferably, the flow-blocking structure 18 comprises a flow-blocking structure body, a set small-caliber flow-limiting port in the middle of the flow-blocking structure body, and two ends thereof are respectively screwed to a connecting pipe.

[0013] Furthermore, a gasket is provided between the connecting pipe and the flow limiting port.

[0014] A compressor performance testing method, using the above compressor performance testing platform, comprises the following steps in sequence:

[0015] S1. Connect the test gas source, adjust the outlet of the inlet pressure reducing valve 1 to the predetermined pressure, and connect it to the inlet and outlet of the tested compressor system 13; open the third manual needle valve 3 and the first manual needle valve 15, start the compressor and start the test;

[0016] S2, hydrogen is decompressed by the inlet pressure reducing valve 1, flows through the second one-way valve 2, the third manual needle valve 3, enters the air intake buffer tank 5, flows through the mass flow meter 6, enters the tested compressor system 13 for pressurization, and the pressurized hydrogen enters the buffer tank 16;

[0017] S3, after observing that the pressure value of the first pressure transmitter 21 reaches the set pressure, close the third manual needle valve 3, after a predetermined number of cycles, open the third manual needle valve 3, observe the value of the second pressure transmitter 11, after reaching the predetermined pressure, close the third manual needle valve 3, observe that the pressure increase of the first pressure transmitter 21 reaches the predetermined pressure, and then cycle the above steps in step S3 until the value of the first pressure transmitter 21 reaches the maximum requirement;

[0018] S4, close the third manual needle valve 3, and the compressor automatically cycles within the set time;

[0019] S5. When reflux is started, the pressure in the rear end pipeline of the tested compressor system 13 reaches the outlet setting value of the tested compressor system, and the control center automatically opens the pneumatic ball valve 17 to actively release the pressure. When the pressure of the first pressure transmitter 21 reaches the setting value, the control center automatically closes the pneumatic ball valve 17. At this time, the mass of hydrogen in the outlet pipeline 14 decreases and the pressure decreases, and the hydrogen circulates in the closed-loop pipeline.

[0020] The beneficial effects of the present invention are:

[0021] 1) The pressure reducing valve is eliminated, and a portion of the hydrogen is discharged through the venting pipeline, and the pressure in the pipeline is reduced by reducing the mass of hydrogen. To control the exhaust volume, the pneumatic ball valve on the exhaust pipeline is used and interlocked with the main pipeline pressure transmitter. When the pressure in the pipeline drops to the target value, the pneumatic ball valve is turned off to stop exhaust. There is no need to set up a pressure reducing valve, nor is there any need to design the pressure control of the pressure reducing valve, which reduces costs, increases versatility, and simplifies the operation process.

[0022] 2) In the absence of external restrictions, high-pressure hydrogen is released at a very fast speed. In order to avoid exhausting the hydrogen, prolong the discharge time, and reserve the response time of the pneumatic ball valve, a flow-blocking structure is added to the discharge pipeline; after the internal aperture is determined in addition to the early design calculation and verification, the flow-blocking structure does not require manual operation in the later stage and is not affected by the pressure and flow at the rear end of the compressor, thereby achieving the purpose of reducing costs, increasing versatility, and reducing manual operation.

[0023] 3) The compressor itself is also equipped with an internal circulation pipeline system, which similarly needs to reduce the pressure before circulating. In the current existing technology, the circulation system of the compressor is also configured in the form of a pressure reducing valve. After the parameters of the tested compressor are determined, the test platform can be used to simulate the working conditions of the compressor and determine the flow resistance structure without waiting for the actual manufacturing of the compressor, which speeds up the development time of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a system structure diagram of the compressor performance testing platform of the present invention.

[0025] Figure 2 It is a structural cross-sectional view of the flow-blocking structure.

[0026] In the figure, 1 is an inlet pressure reducing valve, 2 is a first one-way valve, 3 is a third manual needle valve, 4 is an air intake pipeline, 5 is an air intake buffer tank, 6 is a mass flow meter, 7 is an inlet discharge pipeline, 8 is a second manual needle valve, 9 is a second one-way valve, 10 is a manual needle valve, 11 is a second pressure transmitter, 12 is an inlet safety valve, 13 is a compressor system under test, 14 is an outlet pipeline, 15 is a first manual needle valve, 16 is an exhaust buffer tank, 17 is a pneumatic ball valve, 18 is a flow-blocking structure, 19 is a one-way valve, 20 is a fourth manual needle valve, 21 is a first pressure transmitter, 22 is an outlet safety valve, 23 is a discharge main pipe, 24 is a fifth manual needle valve, and 25 is a third one-way valve. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] See also Figure 1-Figure 2 A compressor performance test platform, comprising an air circulation system including a compressor system 13 under test; the air circulation system is located in the exhaust section after the compressor system 13 under test and no pressure reducing valve is arranged; the exhaust section after the compressor system 13 under test is provided with a first relief pipeline connected with a relief main pipe 23; a pneumatic valve 17 is arranged on the first relief pipeline, and a flow blocking structure 18 is arranged between the pneumatic valve 17 and the relief main pipe 23; a first pressure transmitter 21 for monitoring pressure and feeding back electrical signals to a control center is arranged at the front end of the pneumatic valve 17, and the control center controls the opening and closing / opening degree of the pneumatic valve 17 according to the electrical signals.

[0029] In this embodiment, see Figure 1 The first relief pipeline is also arranged in parallel with a safety pipeline, and an outlet safety valve 22 is provided on the safety pipeline.

[0030] In this embodiment, see Figure 1 A first manual needle valve 15 and an exhaust buffer tank 16 are provided in sequence between the tested compressor system 13 and the first exhaust pipeline.

[0031] In this embodiment, see Figure 1 The suction section before the tested compressor system 13 is provided with a second discharge pipeline connected to the discharge main pipe 23, and the second discharge pipeline is provided with a second manual needle valve 8. The front end of the second manual needle valve 8 is provided with a second pressure transmitter 11 for monitoring the pressure.

[0032] In this embodiment, see Figure 1 The air circulation system is located in the air intake section before the compressor system 13 to be tested and is provided with an air intake buffer tank 5 and a mass flow meter 6 in sequence.

[0033] In this embodiment, see Figure 1, and also includes an intake pipeline 4 connected to the gas circulation system, and the intake pipeline 4 is provided with an inlet pressure reducing valve 1, a first one-way valve 2, and a third manual needle valve 3 from front to back.

[0034] In this embodiment, see Figure 2 The flow-blocking structure 18 includes a flow-blocking structure body, a set small-caliber flow-limiting port in the middle of the flow-blocking structure body, and two ends are respectively screwed to a connecting pipe. A gasket is also provided between the connecting pipe and the flow-limiting port. After the gas passes through the internal porous structure flow-limiting port, it is slowly discharged.

[0035] When performing a compressor performance test, the following steps are included in sequence:

[0036] S1. Connect the test gas source, adjust the outlet of the inlet pressure reducing valve 1 to the predetermined pressure, and connect it to the inlet and outlet of the tested compressor system 13; open the third manual needle valve 3 and the first manual needle valve 15, start the compressor and start the test;

[0037] S2, hydrogen is decompressed by the inlet pressure reducing valve 1, flows through the second one-way valve 2, the third manual needle valve 3, enters the air intake buffer tank 5, flows through the mass flow meter 6, enters the tested compressor system 13 for pressurization, and the pressurized hydrogen enters the buffer tank 16;

[0038] S3, after observing that the pressure value of the first pressure transmitter 21 reaches the set pressure, close the third manual needle valve 3, after a predetermined number of cycles, open the third manual needle valve 3, observe the value of the second pressure transmitter 11, after reaching the predetermined pressure, close the third manual needle valve 3, observe that the pressure increase of the first pressure transmitter 21 reaches the predetermined pressure, and then cycle the above steps in step S3 until the value of the first pressure transmitter 21 reaches the maximum requirement;

[0039] S4, close the third manual needle valve 3, and the compressor automatically cycles within the set time;

[0040] S5. When reflux is started, the pressure in the rear end pipeline of the tested compressor system 13 reaches the outlet setting value of the tested compressor system, and the control center automatically opens the pneumatic ball valve 17 to actively release the pressure. When the pressure of the first pressure transmitter 21 reaches the setting value, the control center automatically closes the pneumatic ball valve 17. At this time, the mass of hydrogen in the outlet pipeline 14 decreases and the pressure decreases, and the hydrogen circulates in the closed-loop pipeline.

[0041] The pressure reducing valve of this scheme discharges part of the hydrogen through the venting pipeline, and reduces the pressure in the pipeline by reducing the mass of hydrogen. To control the exhaust volume, the pneumatic ball valve on the exhaust pipeline is used and interlocked with the main pipeline pressure transmitter. When the pressure in the pipeline drops to the target value, the pneumatic ball valve is turned off to stop exhausting. In the absence of external restrictions, the high-pressure hydrogen is released very quickly. In order to avoid exhausting the hydrogen, prolong the discharge time, and reserve the response time of the pneumatic ball valve, a flow-blocking structure is added to the venting pipeline. The core of the flow-blocking structure is the flow-blocking hole in the center part, which is determined by calculation.

[0042] The compressor itself is also equipped with an internal circulation pipeline system, which similarly needs to reduce the pressure before circulating. In the current existing technology, the circulation system of the compressor is also configured in the form of a pressure reducing valve. After the parameters of the tested compressor are determined, the test platform can be used to simulate the working conditions of the compressor and determine the flow resistance structure without waiting for the actual manufacturing of the compressor, which speeds up the development time of the compressor.

[0043] In this technical solution, the pressure reducing valve is eliminated and a flow blocking structure is added. In addition to the design calculation and verification in the early stage, the flow blocking structure does not require manual operation in the later stage and is not affected by the pressure and flow at the rear end of the compressor. The purpose of reducing costs, increasing versatility and reducing manual operation is achieved.

[0044] The above are preferred embodiments of the present invention. A person skilled in the art may make various changes or improvements on this basis. Without departing from the general concept of the present invention, these changes or improvements should fall within the scope of protection claimed by the present invention.

Claims

1. A compressor performance test platform, characterized in that: A gas circulation system including a compressor system (13) to be tested; The gas circulation system is located in the exhaust section after the compressor system (13) under test and no pressure reducing valve is provided; The exhaust section after the compressor system (13) under test is provided with a first discharge pipeline connected to the discharge main pipe (23); A pneumatic valve (17) is provided on the first relief pipeline, and a flow-blocking structure (18) is provided between the pneumatic valve (17) and the relief main pipe (23); a first pressure transmitter (21) for monitoring pressure and feeding back an electrical signal to a control center is provided at the front end of the pneumatic valve (17), and the control center controls the opening and closing / opening degree of the pneumatic valve (17) according to the electrical signal.

2. The compressor performance testing platform according to claim 1, characterized in that: The first relief pipeline is also arranged in parallel with a safety pipeline, and an outlet safety valve (22) is arranged on the safety pipeline.

3. The compressor performance testing platform according to claim 1, characterized in that: A first manual needle valve (15) and an exhaust buffer tank (16) are also provided in sequence between the compressor system (13) to be tested and the first exhaust pipeline.

4. The compressor performance testing platform according to claim 1, characterized in that: The suction section before the compressor system (13) under test is provided with a second discharge pipeline connected to the discharge main pipe (23), the second discharge pipeline is provided with a second manual needle valve (8), and the front end of the second manual needle valve (8) is provided with a second pressure transmitter (11) for monitoring pressure.

5. The compressor performance testing platform according to claim 1, characterized in that: The air circulation system is provided with an air intake buffer tank (5) and a mass flow meter (6) in sequence within the air intake section before the compressor system (13) to be tested.

6. The compressor performance testing platform according to claim 1, characterized in that: It also includes an air intake pipeline (4) connected to the air circulation system, and the air intake pipeline (4) is provided with an inlet pressure reducing valve (1), a first one-way valve (2), and a third manual needle valve (3) in sequence from front to back.

7. The compressor performance testing platform according to claim 1, characterized in that: The flow-blocking structure (18) comprises a flow-blocking structure body, a set small-caliber flow-limiting port in the middle of the flow-blocking structure body, and two ends of the flow-blocking structure body are respectively screwed to a connecting pipe.

8. The compressor performance testing platform according to claim 7, characterized in that: A gasket is also provided between the connecting pipe and the flow limiting port.

9. A compressor performance testing method, characterized in that: The compressor performance test platform according to any one of claims 1 to 8 comprises the following steps in sequence: S1. Connect the test gas source, adjust the outlet of the inlet pressure reducing valve (1) to a predetermined pressure, and connect it to the inlet and outlet of the tested compressor system (13); open the third manual needle valve (3) and the first manual needle valve (15), start the compressor and start the test; S2, the hydrogen is depressurized by the inlet pressure reducing valve (1), flows through the second one-way valve (2), the third manual needle valve (3), enters the air intake buffer tank (5), flows through the mass flow meter (6), enters the compressor system (13) to be pressurized, and the pressurized hydrogen passes into the buffer tank (16); S3, after observing that the pressure value of the first pressure transmitter (21) reaches the set pressure, close the third manual needle valve (3), after a predetermined number of cycles, open the third manual needle valve (3), observe the value of the second pressure transmitter (11), after reaching the predetermined pressure, close the third manual needle valve (3), observe that the pressure increase of the first pressure transmitter (21) reaches the predetermined pressure, and then repeat the above steps in step S3 until the value of the first pressure transmitter (21) reaches the maximum requirement; S4, close the third manual needle valve (3), and the compressor automatically cycles within the set time; S5, when the backflow is turned on, the pressure in the rear end pipeline of the tested compressor system (13) reaches the outlet setting value of the tested compressor system, and the control center automatically opens the pneumatic ball valve (17) to actively release the pressure. When the pressure of the first pressure transmitter (21) reaches the setting value, the control center automatically closes the pneumatic ball valve (17). At this time, the mass of hydrogen in the outlet pipeline (14) decreases and the pressure decreases, and the hydrogen circulates in the closed-loop pipeline.

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