A performance test bench and test method for an electric turbocompound air compressor

Abstract

The present invention discloses a performance test bench and a test method for an electric turbine compound air compressor. The electric turbine compound air compressor performance test bench includes a turbine to be tested, a compressor to be tested, a motor, a first measuring component, a second measuring component, a third measuring component, a gas heater, a first flow meter, a second flow meter, a pressure stabilizing chamber, an intercooler, an air filter, a first heat exchanger, a second heat exchanger, a first torque sensor, a second torque sensor, and a speed sensor. The test bench also includes an adjustable first throttle valve, a second throttle valve, a third throttle valve, a fourth throttle valve, and a fifth throttle valve. The test bench has multiple working modes and can perform performance tests on the compressor, turbine, and electric turbine compound system. It also has the ability to simulate high-altitude environmental conditions and pulsed flow conditions to meet testing requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of engine testing, and in particular to a performance test bench and a testing method for an electric turbo compound air compressor. Background Art

[0002] Electric turbocompound compressors are a key development in engine turbocharging or fuel cell compressor technology, but specialized test benches for performance testing of these products are lacking. Traditional internal combustion engine turbochargers, which lack motors, require performance testing and adjustment methods under different operating conditions that cannot meet the performance testing requirements of electric turbocompound compressors. For fuel cell compressors, the main current products are electric-driven single-stage or two-stage compressors, which do not include turbines.

[0003] Furthermore, automotive engines or drones may operate in high-altitude environments. As atmospheric pressure decreases with increasing altitude, the engine's air intake decreases, leading to deterioration in engine power and increased fuel consumption. Electric turbocompound air compressors can replenish engine air intake at high altitudes, alleviating air shortages. However, there is currently a lack of performance test benches for electric turbocompound air compressors in high-altitude environments. Conducting such tests requires travel to high-altitude locations, which is costly and inefficient.

[0004] Furthermore, for automotive internal combustion engines, the exhaust process is pulsed due to the periodic opening and closing of the exhaust valve. This means that the pressure of the airflow before the turbine fluctuates significantly, causing the turbine performance to deviate from that under a steady inflow. Currently, turbine performance testing is mainly based on steady inflow conditions, meaning that the pressure and temperature of the gas entering the turbine do not change over time. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a performance test bench for electric turbocompound air compressors that can meet the requirements for air compressor testing under various operating conditions and environments, including high-altitude testing in plain areas. It also proposes a turbine performance testing method for pulsed flow.

[0006] The present invention also provides a method for testing the performance of an electric turbine compound air compressor.

[0007] An electric turbocompound air compressor performance test bench according to an embodiment of the first aspect of the present invention includes: a turbine to be tested, a compressor to be tested, a motor, a first measuring component, a second measuring component, a third measuring component, a gas heater, a first flow meter, a second flow meter, a pressure stabilizing chamber, an intercooler, an air filter, a first heat exchanger, a second heat exchanger, a first torque sensor, a second torque sensor, and a speed sensor, and also includes an adjustable first throttle valve, a second throttle valve, a third throttle valve, a fourth throttle valve, and a fifth throttle valve;

[0008] wherein the motor is connected to the turbine and the compressor respectively;

[0009] The first torque sensor is used to measure the torque of the compressor, the second torque sensor is used to measure the torque of the turbine, and the speed sensor is used to measure the speed of the turbine, the compressor or the motor;

[0010] The compressor is connected to the air inlet through a first pipe. Along the direction from the air inlet to the compressor, the air filter, the first heat exchanger, the fourth throttle valve, the pressure stabilizing chamber, the second flow meter and the third measuring component are sequentially arranged on the first pipe;

[0011] The compressor is connected to the first air outlet via a second pipe, and the second measuring component, the intercooler and the third throttle valve are sequentially arranged on the second pipe in the direction from the compressor to the first air outlet;

[0012] A third pipe is provided between the intercooler and the third throttle valve, the third pipe is provided with a second throttle valve and a first flow meter and is connected to one end of the gas heater;

[0013] The other end of the gas heater is connected to one end of the turbine via a fourth pipe, and the first measuring component is provided on the fourth pipe;

[0014] The other end of the turbine is connected to the second air outlet via a fifth pipe, and the fifth pipe is provided with a first throttle valve;

[0015] A sixth pipeline is provided between the other end of the turbine and the first throttle valve. The second heat exchanger and the fifth throttle valve are sequentially provided on the sixth pipeline and the pipeline is connected to the pressure stabilizing chamber.

[0016] The electric-turbine-compound air compressor performance test bench according to the first embodiment of the present invention has at least the following beneficial effects: the test bench has multiple operating modes, can perform performance tests on the compressor, turbine, and electric-turbine-compound system, and has the ability to simulate high-altitude environmental conditions and simulate pulsed flow conditions to meet testing requirements.

[0017] According to the electric turbocompound air compressor performance test bench described in the embodiment of the first aspect of the present invention, the first throttle valve and the fourth throttle valve are fully open, the fifth throttle valve is closed, and the openings of the second throttle valve and the third throttle valve are adjusted to measure the performance of the compressor separately.

[0018] According to the electric turbo-compound air compressor performance test bench described in the embodiment of the first aspect of the present invention, the first throttle valve and the fourth throttle valve are fully open, the third throttle valve and the fifth throttle valve are closed, and the opening of the second throttle valve, the intercooler and the gas heater are adjusted to measure the performance of the turbine separately.

[0019] According to the electric turbocompound air compressor performance test bench described in the embodiment of the first aspect of the present invention, the first throttle valve is fully open, the fifth throttle valve is closed, and the openings of the fourth throttle valve, the second throttle valve and the third throttle valve are adjusted to test the performance of the compressor under a specific altitude environment.

[0020] According to the electric turbine compound air compressor performance test bench described in the embodiment of the first aspect of the present invention, the fifth throttle valve is fully open, the first throttle valve and the third throttle valve are closed, and the opening of the fourth throttle valve and the second throttle valve are adjusted to test the performance of the turbine at a specific altitude.

[0021] According to the electric turbine compound air compressor performance test bench described in the embodiment of the first aspect of the present invention, the first throttle valve and the fourth throttle valve are fully open, the third throttle valve and the fifth throttle valve are closed, and the opening degree of the second throttle valve changes periodically to test the performance of the turbine with pulses.

[0022] According to the electric turbo-compound air compressor performance test bench described in the embodiment of the first aspect of the present invention, the first throttle valve and the fourth throttle valve are fully open, the third throttle valve and the fifth throttle valve are closed, and the intercooler, the second throttle valve and the gas heater are coordinated and controlled to test the overall performance of the electric turbo-compound air compressor and the power machine working together.

[0023] According to the electric turbo-compound air compressor performance test bench described in the embodiment of the first aspect of the present invention, the first measuring component includes a first temperature sensor, a first total pressure sensor, and a first static pressure sensor arranged in sequence; the second measuring component includes a second temperature sensor, a second total pressure sensor, and a second static pressure sensor arranged in sequence; and the third measuring component includes a third temperature sensor, a third total pressure sensor, and a third static pressure sensor arranged in sequence.

[0024] According to the electric turbo-compound air compressor performance test bench described in the embodiment of the first aspect of the present invention, the electric turbo-compound air compressor performance test bench also includes a first coupling and a second coupling, the first coupling is used to connect the compressor and the motor, and the second coupling is used to connect the turbine and the motor.

[0025] A method for testing the performance of an electric turbocompound air compressor according to a second embodiment of the present invention uses the electric turbocompound air compressor performance test bench described in the first embodiment of the present invention, comprising the following steps:

[0026] When measuring the performance of the compressor alone, the first throttle valve and the fourth throttle valve are fully opened, the fifth throttle valve is closed, and the openings of the second throttle valve and the third throttle valve are cooperatively controlled to control the pressure ratio and flow rate of the compressor.

[0027] When measuring the performance of the turbine alone, the first throttle valve and the fourth throttle valve are fully opened, the third throttle valve and the fifth throttle valve are closed, and the opening of the second throttle valve is adjusted to control the expansion ratio and flow rate of the turbine, and the inlet gas temperature of the turbine is controlled through the intercooler and the gas heater;

[0028] When testing the performance of the compressor under a specific altitude environment, the first throttle valve is fully opened, the fifth throttle valve is closed, the opening of the fourth throttle valve is adjusted to simulate a low-pressure environment at the compressor inlet, the first heat exchanger is adjusted to simulate a low-temperature environment at the compressor inlet, and the openings of the second and third throttle valves are coordinated to control the operating pressure ratio and flow rate of the compressor;

[0029] When testing the performance of the turbine at a specific altitude, the fifth throttle valve is fully opened, the first throttle valve and the third throttle valve are closed, the opening of the fourth throttle valve is adjusted to create a low-pressure environment at the compressor inlet and the turbine outlet, the first heat exchanger is adjusted to create a low-temperature environment at the compressor inlet and the turbine outlet, and the opening of the second throttle valve is cooperatively controlled to allow a specific air flow to enter the gas heater for heating and then enter the turbine for expansion;

[0030] When testing the performance of the turbine by pulse flow, the first throttle valve and the fourth throttle valve are fully opened, the third throttle valve and the fifth throttle valve are closed, and the opening degree of the second throttle valve is periodically changed to generate a pulsating airflow at the turbine inlet;

[0031] When testing the overall performance of the combined operation of the compressor and the turbine, the first throttle valve and the fourth throttle valve are fully opened, the third throttle valve and the fifth throttle valve are closed, and the intercooler, the second throttle valve and the gas heater are controlled in a coordinated manner to simulate the temperature and pressure changes of the gas after passing through the power machine.

[0032] It is not difficult to understand that the electric turbine compound air compressor performance testing method in the embodiment of the second aspect of the present invention has the technical effect of the electric turbine compound air compressor performance testing bench in the embodiment of the first aspect mentioned above, and therefore will not be repeated.

[0033] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0035] Figure 1 is a system block diagram of an embodiment of the present invention;

[0036] Figure 2 This is a block diagram of the principle of connecting the electric turbo compound air compressor to the power machine.

[0037] Reference numerals:

[0038] 1 First throttle valve, 2 Turbine, 3 First temperature sensor, 4 First total pressure sensor, 5 First static pressure sensor, 6 Gas heater, 7 First flowmeter, 8 Second throttle valve, 9 Third throttle valve, 10 Intercooler, 11 Second static pressure sensor, 12 Second total pressure sensor, 13 Second temperature sensor, 14 Compressor, 15 Third static pressure sensor, 16 Third total pressure sensor, 17 Third temperature sensor, 18 Second flowmeter, 19 Pressure stabilizing chamber, 20 Fourth throttle valve, 21 First heat exchanger, 22 Air filter, 23 First torque sensor, 24 First coupling, 25 Fifth throttle valve, 26 Motor, 27 Second heat exchanger, 28 Speed ​​sensor, 29 Second coupling, 30 Second torque sensor. DETAILED DESCRIPTION

[0039] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0040] In the description of this application, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0041] In the description of this application, "several" means one or more, "more" means at least two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the technical features.

[0042] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense. Technical personnel in the relevant technical field can reasonably determine the specific meanings of the above terms in this application after combining the specific content of the technical solution.

[0043] It is understandable that, referring to Figure 2 Electric turbocompounding technology is primarily used in power machines, internal combustion engines, or fuel cell engines. This technology uses turbine 2 to recover exhaust energy from the internal combustion engine or fuel cell stack and convert it into electrical or mechanical energy, significantly improving system efficiency and saving energy. It is expected to be widely used in internal combustion and fuel cell engines in the future. The electric turbocompounding air compressor consists of three main components: compressor 14, motor 26, and turbine 2. Turbine 2 and motor 26 are coaxially arranged, recovering engine exhaust energy and driving compressor 14, which pressurizes air to provide oxidant for the engine. Due to changes in engine operating conditions, the energy provided by turbine 2 may not be balanced with the energy required by compressor 14. In these situations, motor 26 may need to operate in either motor or generator mode. For example, when the engine's air intake is insufficient, motor 26 operates in motor mode, actively increasing the compressor speed, increasing engine air intake, and improving engine power output. When the engine is operating at full load, with sufficient exhaust energy, motor 26 operates in generator mode, recovering more exhaust energy from the engine's exhaust and improving fuel efficiency. The electric turbo compound system can improve the engine's power performance or fuel consumption performance under any engine operating conditions. Therefore, the electric turbo compound air compressor is the development direction of engine turbocharging or fuel cell air compressor technology.

[0044] Reference Figure 1 and Figure 2The electric turbine compound air compressor performance test bench of the first embodiment of the present application can test the performance of the electric turbine compound air compressor under various environments and working conditions. It is a performance test bench capable of simulating high-altitude environmental conditions and pulsed flow conditions.

[0045] The electric turbo compound air compressor performance test bench includes a turbine 2 to be tested, a compressor 14 to be tested, a motor 26, a first measuring component, a second measuring component, a third measuring component, a gas heater 6, a first flow meter 7, a second flow meter 18, a pressure stabilizing chamber 19, an intercooler 10, an air filter 22, a first heat exchanger 21, a second heat exchanger 27, a first torque sensor 23, a second torque sensor 30 and a speed sensor 28, and also includes an adjustable first throttle valve 1, a second throttle valve 8, a third throttle valve 9, a fourth throttle valve 20 and a fifth throttle valve 25;

[0046] The motor 26 is connected to the turbine 2 and the compressor 14 respectively;

[0047] The first torque sensor 23 is used to measure the torque of the compressor 14, the second torque sensor 30 is used to measure the torque of the turbine 2, and the speed sensor 28 is used to measure the speed of the turbine 2, the compressor 14 or the motor 26;

[0048] The compressor 14 is connected to the air inlet through a first pipe. Along the direction from the air inlet to the compressor 14, the first pipe is provided with an air filter 22, a first heat exchanger 21, a fourth throttle valve 20, a pressure stabilizing chamber 19, a second flow meter 18 and a third measuring component in sequence.

[0049] The compressor 14 is connected to the first air outlet through a second pipe. In the direction from the compressor 14 to the first air outlet, the second pipe is provided with a second measuring component, an intercooler 10 and a third throttle valve 9 in sequence.

[0050] A third pipe is provided between the intercooler 10 and the third throttle valve 9 , and the third pipe is provided with a second throttle valve 8 and a first flow meter 7 and is connected to one end of the gas heater 6 ;

[0051] The other end of the gas heater 6 is connected to one end of the turbine 2 via a fourth pipe, and a first measuring component is provided on the fourth pipe;

[0052] The other end of the turbine 2 is connected to the second air outlet via a fifth pipe, and the fifth pipe is provided with a first throttle valve 1;

[0053] A sixth pipeline is provided between the other end of the turbine 2 and the first throttle valve 1 . The second heat exchanger 27 and the fifth throttle valve 25 are sequentially provided on the sixth pipeline and the pipeline is connected to the pressure stabilizing chamber 19 .

[0054] Reference Figure 1 and Figure 2The electric turbine compound air compressor performance test bench of the first embodiment of the present application has multiple working modes, can perform performance tests on the compressor 14, turbine 2 and electric turbine compound system, and has the ability to simulate high-altitude environmental conditions and simulate pulsed flow conditions to meet testing requirements.

[0055] More specifically, by simulating high-altitude ambient temperature and pressure, the performance test bench can conduct bench tests of electric turbocompound air compressors under high-altitude environmental conditions in plain areas, saving testing time and cost. By periodically varying the throttle valve opening, pulsed airflow is generated to simulate the overall performance of the electric turbocompound air compressor and power machine, improving testing efficiency. Separate performance tests of compressor 14 or turbine 2 are conducted, increasing the utilization rate of the performance test bench. During compressor 14 performance testing, energy is recovered through turbine 2, reducing the power of motor 26 and the energy consumption of compressor 14 testing. During turbine 2 performance testing, no additional air compressor is required to supply air to turbine 2, reducing experimental costs and laboratory space requirements, and making the test bench more compact.

[0056] It should be noted that the first throttle valve 1, the second throttle valve 8, the third throttle valve 9, the fourth throttle valve 20 and the fifth throttle valve 25 are used to control the flow and pressure of the gas in the pipeline, the gas heater 6 is used to heat the gas in the pipeline to maintain the inlet temperature of the turbine 2 at the target value, the first flow meter 7 and the second flow meter 18 are used to measure the flow of the gas in the pipeline, the intercooler 10 is used to cool the air after being pressurized by the compressor 14, the pressure stabilizing chamber 19 is used to stabilize the pressure of the gas in the pipeline to ensure that the pressure does not fluctuate violently, the first heat exchanger and the second heat exchanger 27 are used to cool the gas in the pipeline, and the motor 26 can select the electric mode or the power generation mode according to the working conditions.

[0057] In some embodiments of the present application, the first throttle valve 1 and the fourth throttle valve 20 are fully open, the fifth throttle valve 25 is closed, and the openings of the second throttle valve 8 and the third throttle valve 9 are adjusted to independently measure the performance of the compressor 14. It should be noted that by coordinating the openings of the second throttle valve 8 and the third throttle valve 9 to adjust the outlet pressure of the compressor 14, the pressure ratio and flow rate of the compressor 14 can be controlled. In addition, a portion of the gas at the outlet of the compressor 14 flows through the second throttle valve 8 and flows into the turbine 2 to expand and perform work. This energy is recovered, reducing the electrical energy consumption of the compressor 14 test.

[0058] In some embodiments of the present application, the first throttle valve 1 and the fourth throttle valve 20 are fully open, the third throttle valve 9 and the fifth throttle valve 25 are closed, and the opening of the second throttle valve 8, the intercooler 10, and the gas heater 6 are adjusted to independently measure the performance of the turbine 2. It should be noted that the compressor 14, driven by the motor 26, generates high-pressure gas. After passing through the second throttle valve 8, the high-pressure gas enters the turbine 2 and is discharged into the environment through the first throttle valve 1. Adjusting the opening of the second throttle valve 8 controls the expansion ratio and flow rate of the turbine 2. Through the intercooler 10 and the gas heater 6, the gas temperature at the inlet of the turbine 2 is maintained at a target value.

[0059] In some embodiments of the present application, the first throttle valve 1 is fully open, the fifth throttle valve 25 is closed, and the openings of the fourth throttle valve 20, the second throttle valve 8, and the third throttle valve 9 are adjusted to test the performance of the compressor 14 under a specific altitude environment. It should be noted that by adjusting the opening of the fourth throttle valve 20 to create a certain vacuum within the pressure stabilizing chamber 19, simulating a low-pressure environment at the inlet of the compressor 14, and by adjusting the first heat exchanger 21 to simulate a low-temperature environment at the inlet of the compressor 14, the outlet pressure of the compressor 14 is adjusted by coordinated control of the openings of the second throttle valve 8 and the third throttle valve 9, thereby controlling the pressure ratio and flow rate of the compressor 14.

[0060] In some embodiments of the present application, the fifth throttle valve 25 is fully opened, the first throttle valve 1 and the third throttle valve 9 are closed, and the openings of the fourth throttle valve 20 and the second throttle valve 8 are adjusted to test the performance of the turbine 2 at a specific altitude. It should be noted that the motor 26 drives the compressor 14 to compress the air. By adjusting the opening of the fourth throttle valve 20, a certain vacuum is formed in the pressure stabilizing chamber 19, resulting in a low-pressure environment at the compressor 14 inlet and the turbine 2 outlet. The first heat exchanger 21 is adjusted to simulate the low-temperature environment at the compressor 14 inlet and the turbine 2 outlet. After passing through the compressor 14, the opening of the second throttle valve 8 is coordinated with the control of the opening of the second throttle valve 8 to ensure that the appropriate air flow enters the gas heater 6 for heating, then enters the turbine 2 for expansion. The expanded gas is cooled by the second heat exchanger 27 and then re-enters the pressure stabilizing chamber 19 through the fifth throttle valve 25.

[0061] In some embodiments of the present application, the first throttle valve 1 and the fourth throttle valve 20 are fully open, the third throttle valve 9 and the fifth throttle valve 25 are closed, and the opening of the second throttle valve 8 changes periodically to test the performance of the turbine 2 with pulse flow.

[0062] In some embodiments of the present application, Figure 2The first and fourth throttle valves 1 and 20 are fully open, while the third and fifth throttle valves 9 and 25 are closed. The intercooler 10, second throttle valve 8, and gas heater 6 are controlled in a coordinated manner to test the overall performance of the electric turbocompound air compressor and power engine. This coordinated control of the intercooler 10, second throttle valve 8, and gas heater 6 simulates the temperature and pressure changes of the gas after it passes through the power engine (fuel cell stack or internal combustion engine).

[0063] In some embodiments of the present application, the first measuring component includes a first temperature sensor 3, a first total pressure sensor 4, and a first static pressure sensor 5 arranged in sequence; the second measuring component includes a second temperature sensor 13, a second total pressure sensor 12, and a second static pressure sensor 11 arranged in sequence; and the third measuring component includes a third temperature sensor 17, a third total pressure sensor 16, and a third static pressure sensor 15 arranged in sequence.

[0064] It can be understood that the temperature sensor is used to measure the temperature of the gas in the pipeline, the total pressure sensor is used to measure the total pressure of the gas in the pipeline, and the static pressure sensor is used to measure the static pressure of the gas in the pipeline.

[0065] In some embodiments of the present application, the electric turbocompound air compressor performance test bench also includes an air filter 22, a first coupling 24 and a second coupling 29. The air filter 22 is arranged between the air inlet and the first heat exchanger 21. The air filter 22 is used to filter impurities in the air. The first coupling 24 is used to connect the compressor 14 and the motor 26. The second coupling 29 is used to connect the turbine 2 and the motor 26.

[0066] Reference Figure 1 and Figure 2 The electric turbine compound air compressor performance testing method of the second embodiment of the present application may be a method for using the electric turbine compound air compressor performance testing bench of the first embodiment of the present application. The electric turbine compound air compressor performance testing method includes the following steps:

[0067] When measuring the performance of the compressor 14 alone, the first throttle valve 1 and the fourth throttle valve 20 are fully opened, the fifth throttle valve 25 is closed, and the openings of the second throttle valve 8 and the third throttle valve 9 are controlled in coordination to control the pressure ratio and flow rate of the compressor 14.

[0068] More specifically, a control signal is used to set motor 26 to electric mode, controlling motor 26 to accelerate compressor 14 to a target value. Second throttle valve 8 and third throttle valve 9 are coordinated to control compressor 14 to achieve different pressure ratios and flow rates, enabling performance testing of compressor 14. Following these steps, air in the pipeline passes through fourth throttle valve 20 and pressure-surge chamber 19, is compressed by compressor 14, flows through intercooler 10, and is discharged to the environment through second throttle valve 8 and third throttle valve 9.

[0069] When measuring the performance of turbine 2 alone, the first throttle valve 1 and the fourth throttle valve 20 are fully opened, the third throttle valve 9 and the fifth throttle valve 25 are closed, and the opening of the second throttle valve 8 is adjusted to control the expansion ratio and flow rate of turbine 2. The inlet gas temperature of turbine 2 is controlled through the intercooler 10 and the gas heater 6.

[0070] More specifically, a control signal is used to place motor 26 in electric mode, controlling motor 26 to accelerate turbine 2 to the target value. Motor 26 also drives compressor 14 to produce high-pressure gas. Intercooler 10 and gas heater 6 are regulated to maintain the target inlet temperature of turbine 2. Adjusting second throttle valve 8 controls turbine 2 to achieve different expansion ratios and flow rates, enabling performance testing of turbine 2. Following these steps, air in the pipeline passes through fourth throttle valve 20 and pressure-stabilizing chamber 19, is compressed by compressor 14, and heated by gas heater 6 before entering turbine 2, where it expands and performs work. It is then discharged to the environment through first throttle valve 1.

[0071] When testing the performance of the compressor 14 at a specific altitude, the first throttle valve 1 is fully opened, the fifth throttle valve 25 is closed, and the opening of the fourth throttle valve 20 is adjusted to simulate a low-pressure environment at the inlet of the compressor 14. The openings of the second throttle valve 8 and the third throttle valve 9 are controlled in a coordinated manner to control the pressure ratio and flow rate of the compressor 14.

[0072] When testing the performance of turbine 2 at a specific altitude, the fifth throttle valve 25 is fully opened, the first throttle valve 1 and the third throttle valve 9 are closed, and the opening of the fourth throttle valve 20 is adjusted to create a low-pressure environment at the inlet of the compressor 14 and the outlet of the turbine 2. The opening of the second throttle valve 8 is coordinated and controlled to allow a specific air flow to enter the gas heater 6 for heating and then enter the turbine 2 for expansion;

[0073] More specifically, the method of simulating high-altitude environmental conditions is: adjusting the first heat exchanger 21 to cool the air in the pipeline to simulate the high-altitude environmental temperature; adjusting the fourth throttle valve 20 to form a certain vacuum degree in the pressure stabilizing chamber 19 to simulate the high-altitude environmental pressure.

[0074] When testing the performance of the pulse flow down the turbine 2, the first throttle valve 1 and the fourth throttle valve 20 are fully opened, the third throttle valve 9 and the fifth throttle valve 25 are closed, and the opening of the second throttle valve 8 is changed periodically to generate a pulsating airflow at the inlet of the turbine 2; it can be understood that the opening of the second throttle valve 8 is changed periodically to obtain a pulsed airflow.

[0075] When testing the overall performance of the combined operation of compressor 14 and turbine 2, the first and fourth throttle valves 1 and 20 are fully open, while the third and fifth throttle valves 9 and 25 are closed. The intercooler 10, second throttle valve 8, and gas heater 6 are controlled in a coordinated manner to simulate the temperature and pressure changes of the gas after passing through the power machine. By coordinating the intercooler 10, second throttle valve 8, and gas heater 6 to simulate the temperature and pressure changes of the gas after passing through the power machine, the performance of the electric turbo compound system can be tested.

[0076] 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.

[0077] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present application.

Claims

1. An electric turbo compound air compressor performance test bench, characterized in that: include: A turbine to be tested, a compressor to be tested, an electric motor, a first measuring component, a second measuring component, a third measuring component, a gas heater, a first flow meter, a second flow meter, a pressure stabilizing chamber, an intercooler, an air filter, a first heat exchanger, a second heat exchanger, a first torque sensor, a second torque sensor, and a speed sensor, and also includes a first throttle valve, a second throttle valve, a third throttle valve, a fourth throttle valve, and a fifth throttle valve that are adjustable; wherein the motor is connected to the turbine and the compressor respectively; The first torque sensor is used to measure the torque of the compressor, the second torque sensor is used to measure the torque of the turbine, and the speed sensor is used to measure the speed of the turbine, the compressor or the motor; as well as The compressor is connected to the air inlet through a first pipe. Along the direction from the air inlet to the compressor, the air filter, the first heat exchanger, the fourth throttle valve, the pressure stabilizing chamber, the second flow meter and the third measuring component are sequentially arranged on the first pipe; The compressor is connected to the first air outlet via a second pipe, and the second measuring component, the intercooler and the third throttle valve are sequentially arranged on the second pipe in the direction from the compressor to the first air outlet; A third pipe is provided between the intercooler and the third throttle valve, the third pipe is provided with a second throttle valve and a first flow meter and is connected to one end of the gas heater; The other end of the gas heater is connected to one end of the turbine via a fourth pipe, and the first measuring component is provided on the fourth pipe; The other end of the turbine is connected to the second air outlet via a fifth pipe, and the fifth pipe is provided with a first throttle valve; A sixth pipe is provided between the other end of the turbine and the first throttle valve, and the sixth pipe is provided with a second heat exchanger and a fifth throttle valve in sequence and is connected to the pressure stabilizing chamber; The first measuring component includes a first temperature sensor, a first total pressure sensor, and a first static pressure sensor arranged in sequence; the second measuring component includes a second temperature sensor, a second total pressure sensor, and a second static pressure sensor arranged in sequence; and the third measuring component includes a third temperature sensor, a third total pressure sensor, and a third static pressure sensor arranged in sequence; The electric turbocompound air compressor performance test bench also includes a first coupling and a second coupling, wherein the first coupling is used to connect the compressor and the motor, and the second coupling is used to connect the turbine and the motor.

2. The electric turbocompound air compressor performance test bench according to claim 1, characterized in that: The first throttle valve and the fourth throttle valve are fully opened, the fifth throttle valve is closed, and the openings of the second throttle valve and the third throttle valve are adjusted to measure the performance of the compressor separately.

3. The electric turbocompound air compressor performance test bench according to claim 1, characterized in that: The first throttle valve and the fourth throttle valve are fully opened, the third throttle valve and the fifth throttle valve are closed, and the opening of the second throttle valve, the intercooler and the gas heater are adjusted to measure the performance of the turbine individually.

4. The electric turbocompound air compressor performance test bench according to claim 1, characterized in that: The first throttle valve is fully opened, the fifth throttle valve is closed, and the openings of the fourth throttle valve, the second throttle valve, and the third throttle valve are adjusted to test the performance of the compressor under a specific altitude environment.

5. The electric turbocompound air compressor performance test bench according to claim 1, characterized in that: The fifth throttle valve is fully opened, the first throttle valve and the third throttle valve are closed, and the openings of the fourth throttle valve and the second throttle valve are adjusted to test the performance of the turbine at a specific altitude.

6. The electric turbocompound air compressor performance test bench according to claim 1, characterized in that: The first throttle valve and the fourth throttle valve are fully opened, the third throttle valve and the fifth throttle valve are closed, and the opening degree of the second throttle valve is changed periodically to test the performance of the turbine by pulse flow.

7. The electric turbocompound air compressor performance test bench according to claim 1, characterized in that: The first throttle valve and the fourth throttle valve are fully opened, the third throttle valve and the fifth throttle valve are closed, and the intercooler, the second throttle valve and the gas heater are controlled in a coordinated manner to test the overall performance of the electric turbo compound air compressor and the power machine working together.

8. A method for testing the performance of an electric turbocompound air compressor, characterized in that: Using the electric turbocompound air compressor performance test bench according to any one of claims 1 to 7 comprises the following steps: When measuring the performance of the compressor alone, the first throttle valve and the fourth throttle valve are fully opened, the fifth throttle valve is closed, and the openings of the second throttle valve and the third throttle valve are cooperatively controlled to control the pressure ratio and flow rate of the compressor. When measuring the performance of the turbine alone, the first throttle valve and the fourth throttle valve are fully opened, the third throttle valve and the fifth throttle valve are closed, and the opening of the second throttle valve is adjusted to control the expansion ratio and flow rate of the turbine, and the inlet gas temperature of the turbine is controlled through the intercooler and the gas heater; When testing the performance of the compressor under a specific altitude environment, the first throttle valve is fully opened, the fifth throttle valve is closed, the opening of the fourth throttle valve is adjusted to simulate a low-pressure environment at the compressor inlet, the first heat exchanger is adjusted to simulate a low-temperature environment at the compressor inlet, and the openings of the second and third throttle valves are coordinated to control the operating pressure ratio and flow rate of the compressor; When testing the performance of the turbine at a specific altitude, the fifth throttle valve is fully opened, the first throttle valve and the third throttle valve are closed, the opening of the fourth throttle valve is adjusted to create a low-pressure environment at the compressor inlet and the turbine outlet, the first heat exchanger is adjusted to create a low-temperature environment at the compressor inlet and the turbine outlet, and the opening of the second throttle valve is cooperatively controlled to allow a specific air flow to enter the gas heater for heating and then enter the turbine for expansion; When testing the performance of the turbine by pulse flow, the first throttle valve and the fourth throttle valve are fully opened, the third throttle valve and the fifth throttle valve are closed, and the opening degree of the second throttle valve is periodically changed to generate a pulsating airflow at the turbine inlet; When testing the overall performance of the combined operation of the compressor and the turbine, the first throttle valve and the fourth throttle valve are fully opened, the third throttle valve and the fifth throttle valve are closed, and the intercooler, the second throttle valve and the gas heater are controlled in a coordinated manner to simulate the temperature and pressure changes of the gas after passing through the power machine.

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