A two-stage air-floating compressor performance test bench for fuel cells

Abstract

The present application relates to the technical field of air compressors, and specifically discloses a two-stage air-floating air compressor performance test bench for fuel cells, comprising: a primary pipeline connected to the air inlet end of the air compressor to be tested, a secondary pipeline connected to the exhaust end of the air compressor to be tested, an intercooler, a motor controller, a first water cooling system, a second water cooling system, a third water cooling system and a preset controller; one side of the first water cooling system is connected to the cooling water inlet joint of the air compressor to be tested, and one side is connected to the cooling water drain joint of the air compressor to be tested, one side of the second water cooling system is connected to the cooling water inlet joint of the intercooler, and one side is connected to the cooling water drain joint of the intercooler, and one side of the third water cooling system is connected to the cooling water inlet joint of the motor controller, and one side is connected to the cooling water drain joint of the motor controller; the first water cooling system, the second water cooling system and the third water cooling system are all connected to the preset controller.

Description

Technical Field

[0001] The present application relates to the technical field of air compressors, and in particular to a two-stage air-floating air compressor performance test bench for fuel cells. Background Art

[0002] An air compressor is a device used to compress gas. It converts the mechanical energy of a prime mover (usually an electric motor) into the pressure energy of gas. Air compressors are currently used in a wide range of applications, such as in the blasting, instrumentation, and automotive industries.

[0003] During operation, it's common to test the water cooling system's impact on compressor performance. However, existing techniques typically only cool the compressor motor during these tests. Furthermore, the specifications of the coolers used during the test are fixed, and different coolers produce varying cooling effects. Consequently, accurate simulation of actual compressor performance cannot be achieved, resulting in poor accuracy in compressor performance testing. Summary of the Invention

[0004] In view of this, the present application provides a two-stage air-floating air compressor performance test bench for fuel cells. Three water cooling systems are set in the two-stage air-floating air compressor performance test bench for fuel cells. On the one hand, water cooling simulation tests can be performed on different parts that affect the performance of the air compressor. On the other hand, the pressure, temperature, flow rate, etc. of the water in the water cooling system can be adjusted, so that the performance test of the air compressor is closer to the actual operating conditions and the test results are more accurate.

[0005] According to one aspect of the present application, a two-stage air-floating air compressor performance test bench for a fuel cell is provided, comprising:

[0006] A primary pipeline connected to the air inlet end of the air compressor to be tested, a secondary pipeline connected to the exhaust end of the air compressor to be tested, an intercooler, a motor controller, a first water cooling system, a second water cooling system, a third water cooling system and a preset controller;

[0007] One side of the first water cooling system is connected to the cooling water inlet joint of the air compressor to be tested, and one side is connected to the cooling water drain joint of the air compressor to be tested; one side of the second water cooling system is connected to the cooling water inlet joint of the intercooler, and one side is connected to the cooling water drain joint of the intercooler; one side of the third water cooling system is connected to the cooling water inlet joint of the motor controller, and one side is connected to the cooling water drain joint of the motor controller;

[0008] The first water cooling system, the second water cooling system and the third water cooling system are all connected to the preset controller, and the preset controller is used to control the pressure, temperature and flow of water in at least one water cooling system.

[0009] Optionally, the first water cooling system, the second water cooling system and the third water cooling system respectively include a water inlet pipe and a drainage pipe, the water inlet pipe is provided with a water inlet pressure sensor, a water inlet temperature sensor, and a water inlet flow sensor, and the drainage pipe is provided with a drainage temperature sensor and a drainage pressure sensor.

[0010] Optionally, the sensors of the first water cooling system, the second water cooling system and the third water cooling system are all connected to a data analysis device, which calculates the pressure loss based on the collected data of the water inlet pressure sensor and the water outlet pressure sensor, and calculates the cooling capacity based on the collected data of the water inlet temperature sensor and the water outlet temperature sensor.

[0011] Optionally, the data analysis device calculates a target water inlet flow rate and a target water inlet temperature in a water inlet pipe of the third water cooling system based on a cooling capacity requirement corresponding to the third water cooling system.

[0012] Optionally, the outlet of the intercooling device is connected to the inlet of the fuel cell stack, and the data analysis device calculates the matching degree between the intercooling device and the fuel cell stack based on the collected data of the drainage pressure sensor and the drainage temperature sensor of the second water cooling system.

[0013] Optionally, a control valve and a solenoid valve connected in parallel are provided between the outlet of the intercooling device and the inlet of the fuel cell stack.

[0014] Optionally, the motor controller is a high-voltage inverter.

[0015] The two-stage air flotation compressor for fuel cells includes a two-stage air compressor; the performance test bench also includes a first straight pipe section, a second straight pipe section, a third straight pipe section, and a fourth straight pipe section;

[0016] One side of the first straight pipe section is connected to the outlet of the first-stage air compressor, and the other side is connected to the second straight pipe section. A first pressure sensor and a first temperature sensor are provided on the first straight pipe section.

[0017] One side of the fourth straight pipe section is connected to the third straight pipe section, and one side is connected to the inlet of the secondary air compressor. A second pressure sensor and a second temperature sensor are provided on the fourth straight pipe section.

[0018] The first straight pipe section pipeline, the second straight pipe section pipeline, the third straight pipe section pipeline and the fourth straight pipe section pipeline are connected in sequence through elbows.

[0019] Optionally, it also includes an air supply pipeline for the air compressor motor;

[0020] The air supply pipeline of the air compressor motor is connected to the third straight pipe section pipeline, and an air supply flow sensor, an air supply temperature sensor and an air supply pressure sensor are provided on the air compressor motor air supply pipeline.

[0021] Optionally, the primary pipeline is provided with an intake pressure sensor and an intake temperature sensor, and the secondary pipeline is provided with an exhaust pressure sensor and an exhaust temperature sensor;

[0022] The data analysis device calculates the performance of the first-stage air compressor based on the collected data of the intake pressure sensor and the intake temperature sensor, and the collected data of the first pressure sensor and the first temperature sensor;

[0023] The data analysis device calculates the performance of the two-stage air compressor based on the collected data of the second pressure sensor and the second temperature sensor, and the collected data of the exhaust pressure sensor and the exhaust temperature sensor.

[0024] By means of the above technical solution, the present application provides a two-stage air-floating air compressor performance test bench for fuel cells, which may include a primary pipeline, a secondary pipeline, an intercooler, a motor controller, three water cooling systems and a preset controller. Among them, the primary pipeline refers to the pipeline connected to the air inlet end of the air compressor to be tested, and the secondary pipeline refers to the pipeline connected to the exhaust end of the air compressor to be tested. The inlet of the intercooler is connected to the secondary pipeline, and the outlet of the intercooler is connected to the inlet of the fuel cell stack. One side of the first water cooling system is connected to the cooling water inlet joint of the air compressor to be tested, and the other side is connected to the cooling water drain joint of the air compressor to be tested. One side of the second water cooling system is connected to the cooling water inlet joint of the intercooler, and the other side is connected to the cooling water drain joint of the intercooler. One side of the third water cooling system is connected to the cooling water inlet joint of the motor controller, and one side is connected to the cooling water drain joint of the motor controller. The first, second, and third water cooling systems are all connected to a preset controller, allowing the preset controller to control one or more of the three water cooling systems. Under the control of the preset controller, the pressure, temperature, flow rate, and other factors of the water in the water cooling system can be changed. This application provides three water cooling systems in a two-stage air-floating air compressor performance test bench for fuel cells. This allows for water-cooling simulation tests of various components that affect air compressor performance, and also allows for adjustments to be made to the pressure, temperature, and flow rate of the water in the water cooling system, making the air compressor performance test more closely aligned with actual operating conditions and providing more accurate test results.

[0025] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0027] Figure 1 A schematic diagram showing the overall test structure of a two-stage air-floating air compressor performance test bench for fuel cells provided in an embodiment of the present application is shown;

[0028] Figure 2 A schematic diagram showing the water cooling system inlet and outlet pipes of the overall test structure of a two-stage air-floating air compressor performance test bench for fuel cells provided in an embodiment of the present application;

[0029] Figure 3 A schematic diagram showing a valve group of an overall test structure of a two-stage air-floating air compressor performance test bench for a fuel cell provided in an embodiment of the present application;

[0030] Figure 4 A schematic diagram showing a single-stage test structure of a two-stage air-floating air compressor performance test bench for fuel cells provided in an embodiment of the present application is shown;

[0031] Figure 5 A schematic diagram of the air supply pipeline of the air compressor motor of a two-stage air-floating air compressor performance test bench for fuel cells provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0032] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other.

[0033] In this embodiment, a two-stage air-floating air compressor performance test bench for fuel cells is provided. Figure 1 As shown, the test bench includes:

[0034] A primary pipeline 1 connected to the air inlet end of the air compressor to be tested, a secondary pipeline 2 connected to the exhaust end of the air compressor to be tested, an intercooler 3, a motor controller 4, a first water cooling system 5, a second water cooling system 6, a third water cooling system 7, and a preset controller 8 (not shown in the figure);

[0035] One side of the first water cooling system 5 is connected to the cooling water inlet joint of the air compressor to be tested, and one side is connected to the cooling water drain joint of the air compressor to be tested; one side of the second water cooling system 6 is connected to the cooling water inlet joint of the intercooling device 3, and one side is connected to the cooling water drain joint of the intercooling device 3; one side of the third water cooling system 7 is connected to the cooling water inlet joint of the motor controller 4, and one side is connected to the cooling water drain joint of the motor controller 4;

[0036] The first water cooling system 5 , the second water cooling system 6 , and the third water cooling system 7 are all connected to the preset controller 8 , and the preset controller 8 is used to control the pressure, temperature, and flow of water in at least one water cooling system.

[0037] The fuel cell two-stage air-floating air compressor performance test bench provided in the embodiment of the present application may include a primary pipeline 1, a secondary pipeline 2, an intercooler 3, a motor controller 4, three water cooling systems (a first water cooling system 5, a second water cooling system 6, and a third water cooling system 7) and a preset controller 8. Among them, the primary pipeline 1 refers to the pipeline connected to the air inlet end of the air compressor to be tested, and the secondary pipeline 2 refers to the pipeline connected to the exhaust end of the air compressor to be tested. The inlet of the intercooler 3 is connected to the secondary pipeline 2, and the outlet of the intercooler 3 is connected to the fuel cell stack inlet. In the hydrogen fuel cell structure, the exhaust end of the air compressor cannot be directly connected to the thermal reactor of the fuel cell, and a set of air-cooled coolers (intercooler 3) needs to be added in the middle. In addition, one side of the first water cooling system 5 is connected to the cooling water inlet joint of the air compressor to be tested, and the other side is connected to the cooling water drain joint of the air compressor to be tested, which is used to cool the motor of the air compressor. The second water cooling system 6 is connected to the cooling water inlet connector of the intercooler 3 on one side and to the cooling water drain connector of the intercooler 3 on the other side, and is used to cool the air compressor outlet gas flowing through the intercooler 3. The third water cooling system 7 is connected to the cooling water inlet connector of the motor controller 4 on one side and to the cooling water drain connector of the motor controller 4 on the other side, and is used to cool the motor controller 4.

[0038] In order to avoid the problem of inaccurate air compressor performance test caused by the use of fixed-size coolers on the test bench in the prior art, the present application connects the three water cooling systems, namely the first water cooling system 5, the second water cooling system 6 and the third water cooling system 7, to a preset controller 8, so that the preset controller 8 can control one or more of the three water cooling systems. Under the control of the preset controller 8, the pressure, temperature, flow rate, etc. of the water in the water cooling system can be changed, so that the actual performance of the air compressor at different cooling temperatures during the actual operation of the air compressor can be truly simulated, making the performance test of the air compressor more accurate. Among them, the preset controller 8 can be a PLC controller. In the embodiment of the present application, the first water cooling system 5, the second water cooling system 6 and the third water cooling system 7 can work simultaneously, thereby truly simulating the operating state of the air compressor. In addition, they can also work separately, thereby studying the influence of a certain cooling system separately.

[0039] By applying the technical solution of this embodiment, three water cooling systems are set up in the two-stage air-floating air compressor performance test bench for fuel cells. On the one hand, water cooling simulation tests can be performed on different parts that affect the performance of the air compressor. On the other hand, the pressure, temperature, flow rate, etc. of the water in the water cooling system can be adjusted, so that the performance test of the air compressor is closer to the actual operating conditions and the test results are more accurate.

[0040] In an embodiment of the present application, optionally, the first water cooling system 5, the second water cooling system 6 and the third water cooling system 7 respectively include a water inlet pipe and a drainage pipe, and the water inlet pipe is provided with a water inlet pressure sensor, a water inlet temperature sensor, and a water inlet flow sensor, and the drainage pipe is provided with a drainage temperature sensor and a drainage pressure sensor.

[0041] In this embodiment, if Figure 2 As shown, each water cooling system includes a water inlet pipe and a drainage pipe, wherein the first water cooling system 5 includes a water inlet pipe 501 and a drainage pipe 502, the second water cooling system 6 includes a water inlet pipe 601 and a drainage pipe 602, and the third water cooling system 7 includes a water inlet pipe 701 and a drainage pipe 702. Regardless of the first water cooling system 5, the second water cooling system 6, or the third water cooling system 7, a water inlet pressure sensor (such as Figure 2 middle ), water inlet temperature sensor (such as Figure 2 middle ) and water flow sensor (such as Figure 2 middle ), a drainage temperature sensor can also be set on the drainage pipe (such as Figure 2 middle ), drainage pressure sensor (such as Figure 2 middle The water inlet pressure sensor collects pressure data in the water inlet pipe, the water inlet temperature sensor collects temperature data in the water inlet pipe, the water inlet flow sensor collects flow data in the water inlet pipe, the drain temperature sensor collects temperature data in the drain pipe, and the drain pressure sensor collects pressure data in the drain pipe. The data collected by each sensor can better determine the cooling capacity of each water cooling system and better test the performance of the air compressor under different cooling environments.

[0042] In an embodiment of the present application, optionally, the sensors of the first water cooling system 5, the second water cooling system 6 and the third water cooling system 7 are all connected to a data analysis device, and the data analysis device calculates the pressure loss based on the collected data of the water inlet pressure sensor and the water outlet pressure sensor, and calculates the cooling capacity based on the collected data of the water inlet temperature sensor and the water outlet temperature sensor.

[0043] In this embodiment, whether it is the sensor in the first water cooling system 5 or the sensor in the second water cooling system 6 or the third water cooling system 7, they can be connected to the data analysis device, and the data collected by each sensor can be uploaded to the data analysis device. In this way, the data analysis device can use the collected data of the water inlet pressure sensor and the water outlet pressure sensor of any water cooling system received to calculate the pressure loss of the water cooling system, and can also use the collected data of the water inlet temperature sensor and the water outlet temperature sensor of any water cooling system received to calculate the cooling capacity of the water cooling system. Through the data analysis device, the embodiment of the present application can simply and conveniently determine the corresponding pressure loss, cooling capacity, etc. of any water cooling system under different working conditions, thereby conveniently understanding the performance of different water cooling systems.

[0044] In an embodiment of the present application, optionally, the data analysis device calculates a target water inlet flow rate and a target water inlet temperature in the water inlet pipe 701 of the third water cooling system 7 based on a cooling capacity requirement corresponding to the third water cooling system 7 .

[0045] In this embodiment, when the cooling capacity requirement of the third water cooling system 7 is fixed, the target water inlet flow rate and target water inlet temperature in the water inlet pipe 701 of the third water cooling system 7 can also be determined by a data analysis device. Generally, the motor controller 4 corresponding to the third water cooling system 7 is a high-voltage frequency converter, which needs to be water-cooled. Therefore, the minimum water volume and minimum water temperature in the water inlet pipe 701 of the third water cooling system 7 can be determined by a data analysis device under the normal working state of the motor controller 4 (the cooling capacity required at this time is the above-mentioned cooling capacity requirement), wherein the target water inlet flow rate can be the minimum water volume, and the target water inlet temperature can be the minimum water temperature. The embodiment of the present application can determine the minimum water volume and minimum water temperature in the water inlet pipe 701 of the third water cooling system 7 through a data analysis device and the cooling capacity required by the third water cooling system 7. It is simple and convenient, so that the cooling effect of the third water cooling system 7 can be achieved under the conditions of minimum water volume and minimum water temperature.

[0046] In an embodiment of the present application, optionally, the outlet of the intercooling device 3 is connected to the inlet of the fuel cell stack, and the data analysis device calculates the matching degree between the intercooling device 3 and the fuel cell stack based on the collected data of the drainage pressure sensor and the drainage temperature sensor of the second water cooling system 6.

[0047] In this embodiment, the inlet of the intercooler 3 is connected to the second pipeline 2, and the outlet of the intercooler 3 is connected to the inlet of the fuel cell stack. Considering that an intercooler is required between the fuel cell stack and the air compressor, what the fuel cell stack really needs is not the performance of the air compressor, but the performance of the intercooler outlet. Therefore, the collected data of the drainage pressure sensor and the drainage temperature sensor of the second water cooling system 6 of the intercooler 3 can be uploaded to the data analysis device, and the data analysis device can be used to calculate the matching degree between the outlet of the intercooler 3 and the fuel cell stack, so as to better match the air compressor and the fuel cell stack.

[0048] In the embodiment of the present application, optionally, a control valve 9 and a solenoid valve 10 connected in parallel are provided between the outlet of the intercooling device 3 and the inlet of the fuel cell stack.

[0049] In this embodiment, the outlet of the intercooler 3 is connected to the inlet of the fuel cell stack. A valve group can be set between the outlet of the intercooler 3 and the inlet of the fuel cell stack, such as Figure 3 As shown, the valve group can include two valves: a control valve 9 and a solenoid valve 10. The control valve 9 and the solenoid valve 10 are arranged in parallel and are specifically connected using a tee. When the air compressor surges, the solenoid valve 10 can be automatically opened to help exhaust.

[0050] In the embodiment of the present application, optionally, the motor controller 4 is a high-voltage inverter.

[0051] In this embodiment, the motor controller 4 can be a high-voltage inverter. A high-voltage inverter is a high-power inverter with an input power voltage of 3 kV or higher. Voltage levels include 3 kV, 3.3 kV, 6 kV, 6.6 kV, and 10 kV. High-voltage inverters require water cooling.

[0052] The various components of the two-stage air-floating air compressor performance test bench for fuel cells mentioned in the above embodiments can be used in the overall performance test of the air compressor.

[0053] In an embodiment of the present application, optionally, the two-stage flotation air compressor for the fuel cell includes a two-stage air compressor; the performance test bench also includes a first straight pipe section pipeline 11, a second straight pipe section pipeline 12, a third straight pipe section pipeline 13 and a fourth straight pipe section pipeline 14; one side of the first straight pipe section pipeline 11 is connected to the outlet of the first-stage air compressor, and one side is connected to the second straight pipe section pipeline 12, and the first straight pipe section pipeline 11 is provided with a first pressure sensor 111 and a first temperature sensor 112; one side of the fourth straight pipe section pipeline 14 is connected to the third straight pipe section pipeline 13, and one side is connected to the inlet of the second-stage air compressor, and the fourth straight pipe section pipeline 14 is provided with a second pressure sensor 141 and a second temperature sensor 142; the first straight pipe section pipeline 11, the second straight pipe section pipeline 12, the third straight pipe section pipeline 13 and the fourth straight pipe section pipeline 14 are connected in sequence through elbows.

[0054] In an embodiment of the present application, optionally, an intake pressure sensor 101 and an intake temperature sensor 102 are provided on the primary pipeline 1, and an exhaust pressure sensor 201 and an exhaust temperature sensor 202 are provided on the secondary pipeline 2; the data analysis device calculates the performance of the primary air compressor based on the collected data of the intake pressure sensor 101 and the intake temperature sensor 102, and the collected data of the first pressure sensor 111 and the first temperature sensor 112; the data analysis device calculates the performance of the secondary air compressor based on the collected data of the second pressure sensor 141 and the second temperature sensor 142, and the collected data of the exhaust pressure sensor 201 and the exhaust temperature sensor 202.

[0055] In this embodiment, the two-stage air flotation air compressor for fuel cells includes two-stage air compressors, which can be referred to as a primary air compressor and a secondary air compressor. The performance of both the primary air compressor and the secondary air compressor can affect the overall performance of the air compressor. Therefore, when the overall performance test results of the air compressor do not meet expectations, in order to find the problem, separate performance tests can be performed on the primary air compressor and the secondary air compressor. Specifically, if Figure 4 As shown, a straight pipe section can be added to the outlet of the first-stage air compressor. Specifically, this straight pipe section can be called the first straight pipe section 11, and the original inlet pipe of the first-stage air compressor can be retained. In this way, the first straight pipe section 11 and the original inlet pipe can form the pipeline system of the first-stage air compressor. At the same time, a first pressure sensor 111 and a first temperature sensor 112 can be set on the first straight pipe section 11, and the first-stage pipeline 1 itself is provided with an intake pressure sensor 101 and an intake temperature sensor 102. Therefore, the first-stage air compressor can be individually tested for performance and the performance of the first-stage air compressor can be calculated by collecting data from the intake pressure sensor 101 and the intake temperature sensor 102 installed on the first-stage pipeline 1, as well as the pressure data and temperature data collected by the first pressure sensor 111 and the first temperature sensor 112.

[0056] In addition, a straight pipe section can be added to the inlet of the secondary air compressor 2. Specifically, this straight pipe section can be referred to as the fourth straight pipe section 14, and the original outlet pipeline of the secondary air compressor can be retained. In this way, the pipeline system of the secondary air compressor can be formed by the fourth straight pipe section 14 and the original outlet pipeline. At the same time, a second pressure sensor 141 and a second temperature sensor 142 can be installed on the fourth straight pipe section 14, and the secondary pipeline 2 itself is also equipped with an exhaust pressure sensor 201 and an exhaust temperature sensor 202. Therefore, the data collected by the exhaust pressure sensor 201 and the exhaust temperature sensor 202 installed on the secondary pipeline 2, as well as the pressure data and temperature data collected by the second pressure sensor 141 and the second temperature sensor 142, can be used to perform a separate performance test on the secondary air compressor and calculate the performance of the secondary air compressor.

[0057] The performance calculation can also be realized by using a data analysis device. The first pressure sensor 111, the first temperature sensor 112, the second pressure sensor 141, the second temperature sensor 142, the intake pressure sensor 101, the intake temperature sensor 102, the exhaust pressure sensor 201, and the exhaust temperature sensor 202 can all be connected to the data analysis device. The data analysis device can receive and analyze the collected data of these sensors. In addition, Figure 4As shown, the first straight pipe section 11 and the fourth straight pipe section 14 can also be connected by providing a second straight pipe section 12 and a third straight pipe section 13. In the embodiment of the present application, by providing the first straight pipe section 11 at the outlet of the first-stage air compressor and the fourth straight pipe section 14 at the inlet of the second-stage air compressor, if the overall performance test result of the air compressor does not meet the expected result, the performance test of the first-stage air compressor and the second-stage air compressor can be performed separately, so that the problem can be accurately found.

[0058] It should be noted that in order to ensure accurate measurement of the performance of the first-stage air compressor and the second-stage air compressor, the first straight pipe section 11 connected to the outlet of the first-stage air compressor and the fourth straight pipe section 14 connected to the inlet of the second-stage air compressor should both maintain a certain length, and the first pressure sensor 111 and the first temperature sensor 112 arranged on the first straight pipe section 11 can maintain a certain distance from the outlet of the first-stage air compressor, and the second pressure sensor 141 and the second temperature sensor 142 arranged on the fourth straight pipe section 14 can maintain a certain distance from the inlet of the second-stage air compressor. This is because, whether it is the gas at the first-stage air compressor or the gas at the second-stage air compressor, the gas is swirled due to the action of the turbine inside the air compressor. In order to avoid the effect of the swirling gas on the single-stage performance test of the air compressor, the first straight pipe section 11 and the fourth straight pipe section 14 should both have a certain length, and the first pressure sensor 111 and the first temperature sensor 112 set on the first straight pipe section 11 can maintain a certain distance from the first-stage air compressor outlet, and the second pressure sensor 141 and the second temperature sensor 142 set on the fourth straight pipe section 14 can maintain a certain distance from the second-stage air compressor inlet, so that the temperature and pressure data can be collected after the gas stabilizes. Here, the distance between the first pressure sensor 111 and the first temperature sensor 112 set on the first straight pipe section 11 and the first-stage air compressor outlet, and the distance between the second pressure sensor 141 and the second temperature sensor 142 set on the fourth straight pipe section 14 and the second-stage air compressor inlet, are at least 6 times the diameter of the straight pipe section.

[0059] In an embodiment of the present application, optionally, an air compressor motor air supply pipeline 15 is also included; the air compressor motor air supply pipeline 15 is connected to the third straight pipe section pipeline 13, and the air compressor motor air supply pipeline 15 is provided with an air supply flow sensor 151, an air supply temperature sensor 152 and an air supply pressure sensor 153.

[0060] In this embodiment, if Figure 5As shown, when performing separate performance tests on the first-stage air compressor and the second-stage air compressor, a section of air compressor motor air supply line 15 can be added to the third straight pipe section 13. One side of the air compressor motor air supply line 15 is connected to the third straight pipe section 13, and one side is connected to the air compressor. Currently, air compressor motor bearings are commonly used, and gas needs to be blown to the air bearing position. Therefore, in the prior art, air compressors using motors with air bearings all draw gas from the outlet of the first-stage pipeline 1 directly to the motor position of the air compressor. In order to simplify the structure and avoid interference, the present application draws out a section of air compressor motor air supply line 15 on the third straight pipe section 13, and draws gas from the third straight pipe section 13 to the air bearing of the motor. In order to monitor the air supply line of the air compressor motor, an air flow sensor 151, an air temperature sensor 152, and an air pressure sensor 153 may be provided on the air compressor motor air supply line 15. These sensors respectively collect the gas flow, gas temperature, and gas pressure in the air compressor motor air supply line 15. It should be noted that the air flow sensor 151, the air temperature sensor 152, and the air pressure sensor 153 may also be connected to a data analysis device, so that the data analysis device can also perform analysis based on the data collected by the air flow sensor 151, the air temperature sensor 152, and the air pressure sensor 153.

[0061] Through the description of the above embodiments, the present application provides a two-stage air-floating air compressor performance test bench for fuel cells, which can include a primary pipeline 1, a secondary pipeline 2, an intercooler 3, a motor controller 4, three water cooling systems, and a preset controller 8. The primary pipeline 1 refers to the pipeline connected to the air inlet end of the air compressor under test, and the secondary pipeline 2 refers to the pipeline connected to the exhaust end of the air compressor under test. The inlet of the intercooler 3 is connected to the secondary pipeline 2, and the outlet of the intercooler 3 is connected to the inlet of the fuel cell stack. The first water cooling system 5 is connected to the cooling water inlet connector of the air compressor under test on one side and to the cooling water drain connector of the air compressor under test on the other side. The second water cooling system 6 is connected to the cooling water inlet connector of the intercooler 3 on one side and to the cooling water drain connector of the intercooler 3 on the other side. The third water cooling system 7 is connected to the cooling water inlet connector of the motor controller 4 on one side and to the cooling water drain connector of the motor controller 4 on the other side. The first water cooling system 5, the second water cooling system 6, and the third water cooling system 7 are all connected to a preset controller 8, so that the preset controller 8 can control one or more of the three water cooling systems. Under the control of the preset controller 8, the pressure, temperature, flow rate, etc. of the water in the water cooling system can be changed. This application sets up three water cooling systems in a two-stage air-floating air compressor performance test bench for fuel cells. On the one hand, water cooling simulation tests can be performed on different parts that affect the performance of the air compressor. On the other hand, the pressure, temperature, flow rate, etc. of the water in the water cooling system can be adjusted, making the performance test of the air compressor closer to actual operating conditions and the test results more accurate.

[0062] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A two-stage air-floating air compressor performance test bench for fuel cells, characterized in that: include: A primary pipeline connected to the air inlet end of the air compressor to be tested, a secondary pipeline connected to the exhaust end of the air compressor to be tested, an intercooler, a motor controller, a first water cooling system, a second water cooling system, a third water cooling system and a preset controller; One side of the first water cooling system is connected to the cooling water inlet joint of the air compressor to be tested, and one side is connected to the cooling water drain joint of the air compressor to be tested; one side of the second water cooling system is connected to the cooling water inlet joint of the intercooler, and one side is connected to the cooling water drain joint of the intercooler; one side of the third water cooling system is connected to the cooling water inlet joint of the motor controller, and one side is connected to the cooling water drain joint of the motor controller; The first water cooling system, the second water cooling system and the third water cooling system are all connected to the preset controller, and the preset controller is used to control the pressure, temperature and flow of water in at least one water cooling system; The two-stage air flotation compressor for fuel cells includes a two-stage air compressor; the performance test bench also includes a first straight pipe section, a second straight pipe section, a third straight pipe section, and a fourth straight pipe section; One side of the first straight pipe section is connected to the outlet of the first-stage air compressor, and the other side is connected to the second straight pipe section. A first pressure sensor and a first temperature sensor are provided on the first straight pipe section. One side of the fourth straight pipe section is connected to the third straight pipe section, and one side is connected to the inlet of the second-stage air compressor. A second pressure sensor and a second temperature sensor are provided on the fourth straight pipe section. The first straight pipe section, the second straight pipe section, the third straight pipe section, and the fourth straight pipe section are sequentially connected through elbows. The first-level pipeline is provided with an intake pressure sensor and an intake temperature sensor, and the second-level pipeline is provided with an exhaust pressure sensor and an exhaust temperature sensor; The data analysis device calculates the performance of the first-stage air compressor based on the collected data of the intake pressure sensor and the intake temperature sensor, and the collected data of the first pressure sensor and the first temperature sensor; The data analysis device calculates the performance of the two-stage air compressor based on the collected data of the second pressure sensor and the second temperature sensor, and the collected data of the exhaust pressure sensor and the exhaust temperature sensor.

2. The two-stage air-floating air compressor performance test bench for fuel cells according to claim 1 is characterized in that: The first water cooling system, the second water cooling system and the third water cooling system respectively include a water inlet pipe and a drainage pipe. The water inlet pipe is provided with a water inlet pressure sensor, a water inlet temperature sensor and a water inlet flow sensor. The drainage pipe is provided with a drainage temperature sensor and a drainage pressure sensor.

3. The two-stage air-floating air compressor performance test bench for fuel cells according to claim 2 is characterized in that: The sensors of the first water cooling system, the second water cooling system and the third water cooling system are all connected to a data analysis device, which calculates the pressure loss based on the collected data of the water inlet pressure sensor and the drainage pressure sensor, and calculates the cooling capacity based on the collected data of the water inlet temperature sensor and the drainage temperature sensor.

4. The two-stage air-floating air compressor performance test bench for fuel cells according to claim 3 is characterized in that: The data analysis device calculates a target water inlet flow rate and a target water inlet temperature in a water inlet pipe of the third water cooling system based on a cooling capacity requirement corresponding to the third water cooling system.

5. The two-stage air-floating air compressor performance test bench for fuel cells according to claim 3 or 4, characterized in that: The outlet of the intercooler is connected to the inlet of the fuel cell stack, and the data analysis device calculates the matching degree between the intercooler and the fuel cell stack based on the collected data of the drainage pressure sensor and the drainage temperature sensor of the second water cooling system.

6. The two-stage air-floating air compressor performance test bench for fuel cells according to claim 5 is characterized in that: A control valve and a solenoid valve connected in parallel are provided between the outlet of the intercooling device and the inlet of the fuel cell stack.

7. The two-stage air-floating air compressor performance test bench for fuel cells according to claim 1 is characterized in that: The motor controller is a high-voltage frequency converter.

8. The two-stage air-floating air compressor performance test bench for fuel cells according to claim 1 is characterized in that: It also includes the air supply pipeline for the air compressor motor; The air supply pipeline of the air compressor motor is connected to the third straight pipe section pipeline, and an air supply flow sensor, an air supply temperature sensor and an air supply pressure sensor are provided on the air compressor motor air supply pipeline.

Images