High-pressure fuel oil supply system of nozzle stress application regulator test bed

Abstract

The utility model provides a high-pressure fuel oil supply system of a nozzle force application regulator test bed, which comprises an oil supply line, an actuating cylinder and a load oil line, the oil supply line is connected with a C1 interface of a nozzle force application regulator, two oil inlets at two ends of an LC piston of the actuating cylinder are respectively connected with a C2 interface and a C3 interface of the nozzle force application regulator, and the load oil line is connected with the load oil line. The load oil way is connected with a load cavity oil port of the actuator cylinder LC; fuel oil pumped by the oil supply pump is subjected to two-stage filtration, the cleanliness of the fuel oil is guaranteed, and overflow valves are arranged at an oil inlet of the nozzle stress application regulator and an oil outlet of the oil supply pump to protect an oil supply way and guarantee the stability of the pressure of the whole oil supply way.

Description

Technical Field

[0001] The utility model relates to a high-pressure fuel oil supply system for a nozzle afterburner regulator test bench. Background Art

[0002] The nozzle afterburner regulator is a regulating component for the fuel supply amount in the fuel system of an aeroengine. The accuracy of its fuel pressure control is an important condition for the maneuverability of the aircraft. Therefore, before use, the nozzle afterburner regulator will be tested to debug its accuracy; during the test, the test bench requires a fuel supply system that can provide accurate and stable pressure. Content of the Utility Model

[0003] To solve the above technical problems, the utility model provides a high-pressure fuel oil supply system for a nozzle afterburner regulator test bench.

[0004] The utility model is achieved through the following technical solutions.

[0005] A high-pressure fuel oil supply system for a nozzle afterburner regulator test bench provided by the utility model includes an oil supply oil circuit, an actuating cylinder, and a load oil circuit. The oil supply oil circuit is connected to the C1 interface of the nozzle afterburner regulator. The two oil inlets at both ends of the LC piston of the actuating cylinder are respectively connected to the C2 and C3 interfaces of the nozzle afterburner regulator. The load oil circuit is connected to the load chamber oil port of the actuating cylinder LC;

[0006] The oil supply oil circuit includes a closed-loop oil supply pipeline and an open-loop oil supply pipeline. The outlet ends of the closed-loop oil supply pipeline and the open-loop oil supply pipeline are connected in parallel to the main oil supply pipeline. The inlet ends of the closed-loop oil supply pipeline and the open-loop oil supply pipeline are respectively connected to the main return oil pipeline and the main fuel tank Tank1. The main oil supply pipeline is connected to the C1 interface of the nozzle afterburner regulator. A filter FWP9 and a filter FWP10 are sequentially arranged in the direction of oil flow along the main oil supply pipeline. The two ends of the main oil supply pipeline are also respectively connected to a pilot-operated proportional overflow valve BF1 and a safety overflow valve SRV3 through pipelines. The overflow ports of the pilot-operated proportional overflow valve BF1 and the safety overflow valve SRV3 are both connected to the main fuel tank Tank1;

[0007] The C2 and C3 interfaces of the nozzle afterburner regulator are also both connected to the main return oil pipeline;

[0008] The load oil circuit includes an afterburning fuel pump. The afterburning fuel pump is connected to the actuating cylinder LC through a load pipeline. A pneumatic switch valve DF13, a throttle valve D1, and a pneumatic switch valve DF20 are sequentially installed on the load pipeline. The outlet of the afterburning fuel pump is also connected to an overflow valve SRV2. The load chamber oil port of the actuating cylinder is also connected to a manual pressure regulating valve DK10. The overflow valve SRV2 and the regulating valve DK10 are respectively connected to the main fuel tank Tank1.

[0009] The closed-loop fuel supply pipeline and the open-loop fuel supply pipeline respectively include a closed-loop oil pump LP2-1 and a switching oil pump LP2. The oil outlets of the closed-loop oil pump LP2-1 and the switching oil pump LP2 are connected to the main fuel supply pipeline in parallel through pipelines. The oil inlets of the closed-loop oil pump LP2-1 and the switching oil pump LP2 are respectively connected to a pneumatic switching valve DF35 and a pneumatic switching valve DF34 through inlet pipelines. A connecting pipeline is provided between the two inlet pipelines. The inlet of the pneumatic switching valve DF34 is connected to a manual switching valve DK14, and both the manual switching valve DK14 and the pneumatic switching valve DF35 are connected to the main fuel tank.

[0010] One end of the main fuel supply pipeline for inlet is also connected to a manual switching valve DK28, and the manual switching valve DK28 is connected to an accumulator EAT3. A turbine flow sensor Q13, a temperature transmitter T6, and a pressure transmitter PC1 are also installed at one end of the main fuel supply pipeline for outlet.

[0011] Outlet pipelines are respectively installed at the C2 and C3 interfaces of the nozzle afterburner regulator. Pressure transmitters and filters are installed on both outlet pipelines. The two oil inlets at both ends of the piston of the actuator LC are respectively connected to the two outlet pipelines through outlet branch pipes. The two outlet pipelines are also respectively connected to the main return oil pipeline through return oil branch pipes. Pneumatic switching valves are installed on both the outlet branch pipes and the return oil branch pipes.

[0012] A parallel-connected filter FWP3-1 and a filter FWP3-2 are also installed in parallel at the outlet of the afterburner fuel pump. The load pipeline is also connected to a cleanliness monitor OCD1, and a pneumatic switching valve DK26 is provided between the load pipeline and the cleanliness monitor OCD1.

[0013] The pneumatic switching valve DF13 is also connected to a turbine flow sensor Q20 and a throttle valve D2. The inlets of the turbine flow sensor Q20 and the throttle valve D2 are respectively connected in series with a pneumatic switching valve DF6 and a pneumatic switching valve DF7.

[0014] An accumulator EST2 and a turbine flow sensor Q12 are also provided between the throttle valve D1 and the pneumatic switching valve DF20.

[0015] A turbine flowmeter Q21 is also provided on the main return oil pipeline.

[0016] The beneficial effects of the present utility model are as follows: The fuel pumped by the fuel supply pump is filtered through two stages to ensure the cleanliness of the fuel. An overflow valve is provided at both the oil inlet of the nozzle afterburner regulator and the oil outlet of the fuel supply pump to protect the fuel supply pipeline and ensure the stability of the pressure of the entire fuel supply pipeline. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the principle of the high-pressure fuel supply system of the present utility model. Detailed Embodiments

[0018] The technical solution of the present utility model will be further described below, but the scope of protection is not limited thereto.

[0019] A high-pressure fuel supply system for a nozzle afterburner regulator test bench includes a fuel supply oil circuit, an actuator cylinder, and a load oil circuit. The fuel supply oil circuit is connected to the C1 interface of the nozzle afterburner regulator. The two oil inlets at both ends of the LC piston of the actuator cylinder are respectively connected to the C2 and C3 interfaces of the nozzle afterburner regulator, and the load oil circuit is connected to the load chamber oil port of the actuator cylinder LC;

[0020] The fuel supply oil circuit includes a closed-loop fuel supply pipeline and an open-loop fuel supply pipeline. The outlet ends of the closed-loop fuel supply pipeline and the open-loop fuel supply pipeline are connected in parallel to the main fuel supply pipeline. The inlet ends of the closed-loop fuel supply pipeline and the open-loop fuel supply pipeline are respectively connected to the main return oil pipeline and the main fuel tank Tank1. The main fuel supply pipeline is connected to the C1 interface of the nozzle afterburner regulator. A filter FWP9 and a filter FWP10 are sequentially arranged in the direction of fuel flow along the main fuel supply pipeline. Both ends of the main fuel supply pipeline are also respectively connected to a pilot-operated proportional relief valve BF1 and a safety relief valve SRV3 through pipelines. The overflow ports of the pilot-operated proportional relief valve BF1 and the safety relief valve SRV3 are both connected to the main fuel tank Tank1;

[0021] As Figure 1 shown, an explosion-proof three-phase asynchronous variable-frequency motor M2 drives a three-plunger pump LP2 to transport fuel from the fuel tank to the fuel pipeline. A safety relief valve SRV3 is connected in parallel at the outlet of the LP2 pump to protect the pipeline safety. The high-pressure fuel output by the LP2 pump flows through two-stage filtration of a 20um filter FWP9 and a 5um filter FWP10 and then enters the C1 port. The inlet pressure of the C1 port is adjusted by controlling the pilot-operated proportional relief valve BF1. The accumulator EST3 is used in the pipeline to absorb the impact pressure or pulsating pressure, playing a role in stabilizing the pressure and reducing the fuel pressure fluctuation in the pipeline. The temperature sensor T6, the flow sensor Q13, and the pressure sensor PS1 are used to measure the flow rate, temperature, and pressure values of the fuel in the C1 fuel supply pipeline.

[0022] When the nozzle afterburner regulator is tested, the fuel supplied to the C1 port can be in a closed-loop or an open-loop. When in the open-loop, the pneumatic switch valve DF34 is opened and DF35 is closed, and the fuel is supplied by the fuel tank T1. When in the closed-loop, the pneumatic switch valve DF35 is opened and DF34 is closed, and the fuel is supplied by the closed-loop fuel supply pipeline.

[0023] Working principle of the actuator: When the actuator moves to the right, solenoid valves DF16-1, DF15-1 and DF15-2 are opened, and the fuel oil at port C2 of the nozzle afterburner regulator enters the left chamber of the actuator, pushing the piston rod of the actuator to move to the right; when the actuator moves to the left, solenoid valves DF15-1, DF16-2 and DF16-2 are opened, and the fuel oil at port C3 of the nozzle afterburner regulator enters the right chamber of the actuator, pushing the piston rod of the actuator to move to the left. The displacement of the actuator is detected by a displacement sensor.

[0024] The load oil circuit includes an afterburner fuel pump. The afterburner fuel pump is connected to the actuator LC through a load pipeline. A pneumatic switch valve DF13, a throttle valve D1, and a pneumatic switch valve DF20 are sequentially installed on the load pipeline. The oil outlet of the afterburner fuel pump is also connected to a relief valve SRV2. The load chamber oil port of the actuator is also connected to a manual pressure regulating valve DK10. The relief valve SRV2 and the regulating valve DK10 are respectively connected to the main fuel tank Tank1. From the afterburner fuel pump

[0025] The closed-loop fuel supply pipeline and the open-loop fuel supply pipeline respectively include a closed-loop oil pump LP2-1 and a switch oil pump LP2. The oil outlets of the closed-loop oil pump LP2-1 and the switch oil pump LP2 are connected to the main fuel supply pipeline in parallel through pipelines. The oil inlets of the closed-loop oil pump LP2-1 and the switch oil pump LP2 are respectively connected to a pneumatic switch valve DF35 and a pneumatic switch valve DF34 through inlet pipelines. A connection pipeline is input between the two inlet pipelines. The inlet of the pneumatic switch valve DF34 is connected to a manual switch valve DK14. Both the manual switch valve DK14 and the pneumatic switch valve DF35 are connected to the main fuel tank.

[0026] One end of the main fuel supply pipeline for oil inlet is also connected to a manual switch valve DK28. The manual switch valve DK28 is connected to an accumulator EAT3. A turbine flow sensor Q13, a temperature transmitter T6, and a pressure transmitter PC1 are also installed on the end of the main fuel supply pipeline for oil outlet.

[0027] Outlet pipelines are respectively installed at the C2 and C3 interfaces of the nozzle afterburner regulator. Pressure transmitters and filters are installed on both outlet pipelines. The two oil inlet ports at both ends of the piston of the actuator LC are respectively connected to the two outlet pipelines through outlet branch pipes. The two outlet pipelines are also respectively connected to the main return oil pipeline through return oil branch pipes. Pneumatic switch valves are installed on both the outlet branch pipes and the return oil branch pipes.

[0028] Filters FWP3-1 and FWP3-2 in parallel are also installed in parallel at the outlet of the afterburner fuel pump. The load pipeline is also connected to a cleanliness monitor OCD1. A pneumatic switch valve DK26 is provided between the load pipeline and the cleanliness monitor OCD1. The fuel pressure is provided by the afterburner fuel pump and is input to the load chamber of the actuator after being regulated by the throttle valve D1 to provide a reverse and accurate test pressure for the nozzle afterburner regulator.

[0029] The pneumatic switch valve DF13 is also connected to the turbine flow sensor Q20 and the throttle valve D2. The inlets of the turbine flow sensor Q20 and the throttle valve D2 are respectively connected in series with the pneumatic switch valve DF6 and the pneumatic switch valve DF7. When the load chamber of the actuator is overpressured, the pneumatic switch valves DF6 and DF7 can be opened, the inlet pressure of the load chamber of the actuator is reduced by throttling through the throttle valve, and the pressure of the pressure-dividing pipeline is monitored by the turbine flow sensor Q20.

[0030] An accumulator EST2 and a turbine flow sensor Q12 are also provided between the throttle valve D1 and the pneumatic switch valve DF20.

[0031] A turbine flowmeter Q21 is also provided on the main oil return pipeline.

Claims

1. A high-pressure fuel supply system for a nozzle booster regulator test bench, characterized in that: It includes an oil supply circuit, an actuator, and a load oil circuit. The oil supply circuit is connected to the C1 interface of the nozzle booster regulator. The two oil inlets at both ends of the piston of the actuator LC are respectively connected to the C2 and C3 interfaces of the nozzle booster regulator. The load oil circuit is connected to the load chamber oil port of the actuator LC. The oil supply circuit includes a closed-loop oil supply pipeline and an open-loop oil supply pipeline. The oil outlet ends of the closed-loop oil supply pipeline and the open-loop oil supply pipeline are connected in parallel to the main oil supply pipeline. The oil inlet ends of the closed-loop oil supply pipeline and the open-loop oil supply pipeline are respectively connected to the main return oil pipeline and the main oil tank Tank1. The main oil supply pipeline is connected to the C1 interface of the nozzle booster regulator. A filter FWP9 and a filter FWP10 are sequentially provided on the main oil supply pipeline in the direction of oil flow. The two ends of the main oil supply pipeline are also respectively connected to the pilot proportional relief valve BF1 and the safety relief valve SRV3 through pipelines. The overflow ports of the pilot proportional relief valve BF1 and the safety relief valve SRV3 are both connected to the main oil tank Tank1. The C2 and C3 interfaces of the nozzle booster regulator are also connected to the main oil return pipeline; The load oil circuit includes a booster fuel pump, which is connected to the actuator LC through a load pipeline. A pneumatic switch valve DF13, a throttle valve D1, and a pneumatic switch valve DF20 are installed on the load pipeline in sequence. The oil outlet of the booster fuel pump is also connected to a relief valve SRV2. The load chamber oil port of the actuator is also connected to a manual pressure regulating valve DK10. The relief valve SRV2 and the regulating valve DK10 are respectively connected to the main oil tank Tank1.

2. The high-pressure fuel supply system of the nozzle booster regulator test bench according to claim 1, characterized in that: The closed-loop oil supply pipeline and the open-loop oil supply pipeline respectively include a closed-loop oil pump LP2-1 and a switch oil pump LP2. The oil outlets of the closed-loop oil pump LP2-1 and the switch oil pump LP2 are connected to the main oil supply pipeline in parallel through pipelines. The oil inlets of the closed-loop oil pump LP2-1 and the switch oil pump LP2 are respectively connected to the pneumatic switch valve DF35 and the pneumatic switch valve DF34 through oil inlet pipes. A communication pipeline is input between the two oil inlet pipes. The inlet of the pneumatic switch valve DF34 is connected to the manual switch valve DK14. The manual switch valve DK14 and the pneumatic switch valve DF35 are both connected to the main oil tank.

3. The high-pressure fuel supply system of the nozzle booster regulator test bench according to claim 1, characterized in that: The oil inlet end of the main oil supply pipeline is also connected to a manual switch valve DK28, which is connected to the accumulator EAT3. The oil outlet end of the main oil supply pipeline is also equipped with a turbine flow sensor Q13, a temperature transmitter T6, and a pressure transmitter PC1.

4. The high-pressure fuel supply system of the nozzle booster regulator test bench according to claim 1, characterized in that: The C2 and C3 interfaces of the nozzle booster regulator are respectively installed with outlet pipes, and pressure transmitters and filters are installed on the two outlet pipes. The two oil inlets at both ends of the actuator LC piston are respectively connected to the two outlet pipes through oil outlet branches, and the two outlet pipes are also connected to the main oil return pipeline through oil return branches, and pneumatic switching valves are installed on the oil outlet branch and the oil return branch.

5. The high-pressure fuel supply system of the nozzle booster regulator test bench according to claim 1, characterized in that: The booster fuel pump outlet is also installed with parallel filters FWP3-1 and FWP3-2. The load pipeline is also connected to the cleanliness monitor OCD1. A pneumatic switch valve DK26 is provided between the load pipeline and the cleanliness monitor OCD1.

6. The high-pressure fuel supply system of the nozzle booster regulator test bench according to claim 1, characterized in that: The pneumatic switch valve DF13 is also connected to the turbine flow sensor Q20 and the throttle valve D2. The inlets of the turbine flow sensor Q20 and the throttle valve D2 are respectively connected in series with the pneumatic switch valve DF6 and the pneumatic switch valve DF7.

7. The high-pressure fuel supply system of the nozzle booster regulator test bench according to claim 1, characterized in that: An accumulator EST2 and a turbine flow sensor Q12 are also provided between the throttle valve D1 and the pneumatic switch valve DF20.

8. The high-pressure fuel supply system of the nozzle booster regulator test bench according to claim 1, characterized in that: The main oil return pipeline is also provided with a turbine flowmeter Q21.

Images