Power recovery type tester for high-pressure large-flow fuel pump

Abstract

The invention discloses a power recovery type tester for a high-pressure large-flow fuel pump, belongs to the technical field of aero-engine fuel pump tests, and solves the problem of large energy loss caused by the fact that redundant power of a tester is converted into heat dissipation. According to the technical scheme, the device mainly comprises a hydraulic motor, a generator, a safety overflow valve, an oil tank assembly and a refrigerating unit, one end of the oil tank assembly is connected with the refrigerating unit, the other end of the oil tank assembly is connected with a low-pressure oil supply pump, the low-pressure oil supply pump is connected with a tested piece, and one end of the tested piece is externally connected with a driving motor. One end of the control system is connected with a power supply system, the other end of the control system is connected with a safety overflow valve and a hydraulic motor, the hydraulic motor is connected with a generator, the generator is connected with an SMM converter system and an AEF active front end, the SMM converter system and the AEF active front end are matched to control a load system, and the generator is connected with a refrigerating unit. The invention is mainly used for reducing the energy dissipation and the installed power of the system.

Description

Technical Field

[0001] The invention relates to a power recovery tester for a high-pressure and large-flow fuel pump, belonging to the technical field of aviation engine fuel pump testing. Background Art

[0002] Before leaving the factory, aircraft engine fuel pumps need to undergo a series of test projects to simulate the working conditions of the fuel pumps when working on the engine. During the test, the fuel pumps often need to be loaded. Traditional aircraft engine fuel pump testers mostly use throttle valves or relief valves to load through throttling, but the throttle port is easily disturbed by temperature, causing fluctuations in loading pressure and howling at the outlet, which has a negative impact on the load stability during the fuel pump test and the health of the test personnel. In addition, during the test, a certain load needs to be applied to the fuel pump to simulate the actual working conditions of the fuel pump on the engine as much as possible, which requires the tester to provide sufficiently large hydraulic energy, which is eventually absorbed by the throttle valve / relief valve or dissipated through different pathways, such as being converted into heat energy and carried away by cooling water, dissipated by the radiator surface, component housing, and tester pipeline wall, and all excess power is converted into heat and dissipated. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a power recovery tester for a high-pressure and high-flow fuel pump, which improves the problem that the excess power of the tester is converted into heat dissipation, resulting in large energy loss.

[0004] The present invention provides a power recovery tester for a high-pressure and large-flow fuel pump, comprising a hydraulic motor, a generator, a safety overflow valve, a fuel tank assembly and a refrigeration unit, wherein one end of the fuel tank assembly is connected to the refrigeration unit, and the other end is connected to a low-pressure fuel supply pump, the low-pressure fuel supply pump is connected to a test piece, one end of the test piece is externally connected to a drive motor, and the other end is connected to a safety overflow valve and a hydraulic motor, the hydraulic motor is connected to a generator, the generator is connected to an SMM converter system and an AEF active front end, the SMM converter system and the AEF active front end cooperate to control a load system, and the generator is connected to the refrigeration unit.

[0005] Furthermore, the oil tank assembly includes an oil tank and an automatic refueling assembly connected to the oil tank, the oil tank includes an oil outlet and an oil return, the oil outlet is connected to a low-pressure oil supply pump, and the oil return is connected to a refrigeration unit.

[0006] Furthermore, the automatic refueling assembly includes an electric proportional valve and a refueling pump, the electric proportional valve is connected to the refueling pump, and the refueling pump is connected to the fuel tank.

[0007] Furthermore, the oil return line is also connected to a heat exchanger, and the heat exchanger is connected to a refrigeration unit.

[0008] Furthermore, a pressure sensor is provided at the front end of the hydraulic motor.

[0009] Furthermore, the oil tank is provided with a liquid level gauge for detecting the liquid level in the oil tank.

[0010] The above technical solution is adopted, and the advantages of the present invention are: through the SMM converter system and AEF active front end carried by the generator, the electric energy generated by the generator is rectified, filtered and stored in the load system by the SMM converter system and the AEF active front end. During the test, the load system can be selected to be in the energy storage or energy output state according to the test requirements: if it is a normal temperature medium test, the load system will store the rectified and filtered electric energy; if it is a low temperature medium test, the load system will provide electric energy for the refrigeration unit, realizing the recycling of energy flow, which not only reduces the energy dissipation, but also reduces the installed power of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of a power recovery tester for a high-pressure, high-flow fuel pump; Figure 2 This is a schematic diagram of a power recovery tester for a high-pressure and high-flow fuel pump; In the figure: hydraulic motor 1, generator 2, safety relief valve 3, oil tank assembly 4, oil tank 401, oil outlet 402, oil return 403, electric proportional valve 404, refueling pump 405, refrigeration unit 5, low-pressure oil supply pump 6, measured part 7, heat exchanger 8, pressure sensor 9, liquid level meter 10, oil filter 11, temperature sensor 12, turbine flowmeter 13, air filter 14, ball valve 15. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0013] The terms "first", "second", etc. (if any) in the specification and claims of the present invention are used to distinguish similar objects, rather than to describe a specific order or sequence. Even if "second" is used to distinguish before a certain technical feature, it does not necessarily indicate that "first" is present. It should be understood that in the present invention, "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. It should be understood that in the present invention, "multiple" refers to two or more. "And / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, X and / or Y can represent: X exists alone, X and Y exist at the same time, and Y exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "Including X, Y and Z", "Including X, Y, Z" means that X, Y, and Z are all included, "Including X, Y or Z" means that one of X, Y, and Z is included, and "Including X, Y and / or Z" means that any one, any two, or three of X, Y, and Z are included.

[0014] like Figure 1 to Figure 2 As shown, the present invention provides a power recovery tester for a high-pressure and large-flow fuel pump, comprising a hydraulic motor 1, a generator 2, a safety relief valve 3, a fuel tank 401 component 4 and a refrigeration unit 5, wherein one end of the fuel tank 401 component 4 is connected to the refrigeration unit 5, and the other end is connected to a low-pressure fuel supply pump 6, the low-pressure fuel supply pump 6 is connected to a test piece 7, one end of the test piece 7 is externally connected to a drive motor, and the other end is connected to the safety relief valve 3 and the hydraulic motor 1, the hydraulic motor 1 is connected to the generator 2, the generator 2 is connected to an SMM converter system and an AEF active front end, the SMM converter system and the AEF active front end cooperate to control the load system, and the generator 2 is connected to the refrigeration unit 5.

[0015] The present invention uses the SMM converter system and AEF active front end carried by the generator 2 to rectify and filter the electric energy generated by the generator 2 and store it in the load system. During the test, the load system can be selected to be in an energy storage state or an energy output state according to the test requirements: if it is a normal temperature medium test, the load system stores the rectified and filtered electric energy; if it is a low temperature medium test, the load system provides electric energy for the refrigeration unit 5, realizing the recycling of energy flow, which not only reduces energy dissipation, but also reduces the installed power of the system.

[0016] Specifically, the SMM converter system 9 works in the torque mode, and the generator 2 is quantitatively loaded by setting the torque value. The generator 2 is the load of the hydraulic motor 1, and the hydraulic motor 1 is the load of the test piece 7. Therefore, the load of the test piece 7 can be controlled by controlling the electromagnetic resistance during the operation of the generator 2. The magnitude of the electromagnetic resistance torque load of the generator 2 is calculated by the following formula:

[0017] Where T is the load torque; CT is the torque constant of generator 2; Ф is the magnetic flux; I is the armature current. According to the formula, the size of the system load is related to the size of the magnetic flux and the armature current. Therefore, applying different loads to the test piece 7 can be achieved by changing the values ​​of the magnetic flux and the armature current of the generator 2.

[0018] The oil tank 401 assembly 4 includes an oil tank 401 and an automatic refueling assembly connected to the oil tank 401. The oil tank 401 includes an oil outlet 402 and an oil return 403. The oil outlet 402 is connected to the low-pressure oil supply pump 6. The oil return 403 is connected to the refrigeration unit 5. An oil filter 11 is provided between the low-pressure oil supply pump 6 and the tested part 7. The low-pressure oil supply pump 6 draws out the oil in the oil tank 401 under the drive of the driving motor, and supplies the clean low-pressure fuel to the tested part 7 after filtering through the oil filter 11. The tested part 7 pressurizes the low-pressure fuel under the drive of the driving motor. The high-pressure, high-flow fuel is output. After the high-pressure, high-flow oil output by the side component passes through the quantitative hydraulic motor 1, the hydraulic motor 1 rotates under the drive of the high-pressure, high-flow fuel pressure energy, driving the generator 2 to rotate and generate electrical energy; a turbine flowmeter 13 is arranged on the outlet pipeline of the hydraulic motor 1 to measure the output flow; at the same time, the inlet of the hydraulic motor 1 is equipped with a pressure sensor 9 and a temperature sensor 12 to monitor the pressure of the output fuel of the side component in real time, and to perform closed-loop control with the terminal load control system to ensure that the output pressure fluctuation is within the range of ±0.5MPa.

[0019] Specifically, the automatic refueling component includes an electric proportional valve 404 and a refueling pump 405. An oil filter 11 is also provided between the electric proportional valve 404 and the refueling pump 405. The electric proportional valve 404 is connected to the refueling pump 405, and the refueling pump 405 is connected to the oil tank 401 to realize automatic refueling of the oil tank 401.

[0020] Specifically, the oil return line 403 is also connected to a heat exchanger 8, which is connected to the refrigeration unit 5. The heat exchanger 8 is used to initially cool the return oil. When the test medium needs to be cooled to -40°C, the refrigeration unit 5 is started to reduce the oil temperature to the target value.

[0021] An oil filter 11 for filtering oil is also provided between the refrigeration unit 5 and the oil tank 401 .

[0022] It can be understood that, in order to detect the amount of oil in the oil tank 401 , a liquid level gauge 10 for detecting the liquid level of the oil tank 401 is provided on the oil tank 401 , and an air filter 14 is also provided on the oil tank 401 .

[0023] Specifically, ball valves 15 are provided between the oil tank 401 and the refueling pump 405, between the oil tank 401 and the low-pressure oil pump, between the pressure sensor 9 and the oil outlet 402, between the water outlets of the heat exchanger 8, and between the refrigeration component and the oil tank 401 to control the flow of oil.

[0024] In addition to the above-mentioned preferred embodiments, the present invention also has other implementation modes. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A power recovery tester for a high-pressure and high-flow fuel pump, characterized in that: The invention comprises a hydraulic motor (1), a generator (2), a safety overflow valve (3), an oil tank assembly (4) and a refrigeration unit (5); one end of the oil tank assembly (4) is connected to the refrigeration unit (5), and the other end is connected to a low-pressure oil supply pump (6); the low-pressure oil supply pump (6) is connected to a device under test (7); one end of the device under test is externally connected to a drive motor, and the other end is connected to the safety overflow valve (3) and the hydraulic motor (1); the hydraulic motor (1) is connected to the generator (2); the generator (2) is connected to an SMM converter system and an AEF active front end; the SMM converter system and the AEF active front end cooperate to control a load system; and the generator (2) is connected to the refrigeration unit (5).

2. The power recovery tester for a high-pressure and high-flow fuel pump according to claim 1, characterized in that: The oil tank assembly (4) comprises an oil tank (401) and an automatic oil filling assembly connected to the oil tank (401); the oil tank (401) comprises an oil outlet (402) and an oil return (403); the oil outlet (402) is connected to a low-pressure oil supply pump (6); and the oil return (403) is connected to a refrigeration unit (5).

3. The power recovery tester for a high-pressure and high-flow fuel pump according to claim 2, characterized in that: The automatic refueling assembly comprises an electric proportional valve (404) and a refueling pump (405); the electric proportional valve (404) is connected to the refueling pump (405); and the refueling pump (405) is connected to the oil tank (401).

4. The power recovery tester for a high-pressure and high-flow fuel pump according to claim 2, characterized in that: The oil return line (403) is also connected to a heat exchanger (8), and the heat exchanger (8) is connected to a refrigeration unit (5).

5. The power recovery tester for a high-pressure and high-flow fuel pump according to claim 1, characterized in that: A pressure sensor (9) is provided at the front end of the hydraulic motor (1).

6. The power recovery tester for a high pressure and large flow fuel pump according to claim 1, characterized in that: The oil tank (401) is provided with a liquid level meter (10) for detecting the height of the liquid level in the oil tank.

Images