Semi-physical test device and method for engine thermal management

Abstract

The present application belongs to the field of semi-physical test of thermal management of fuel system of aviation gas turbine engine, and particularly relates to a semi-physical test device and method for thermal management of engine; the test device is an oil supply circuit formed by an oil supply pipeline through a fuel supply tank, a water-cooled radiator, a centrifugal pump, a fuel filter, a gear pump, a regulating device, a fuel and lubricating oil radiator, a nozzle and the fuel supply tank connected in series in sequence; an actuating device is connected in parallel between the centrifugal pump and the gear pump; a fuel temperature detection device for detecting the oil temperature at the outlet is installed at the outlet of the water-cooled radiator, and the size of the water valve of the water-cooled radiator is controlled by the oil temperature detected by the fuel temperature detection device so that the oil temperature at the outlet of the water-cooled radiator is maintained at a preset value; the present application does not require an electric fuel heating device, and is arranged according to the actual installation position, uses a return oil tank to simulate an engine combustion chamber, and uses a controller to simulate an engine flow control signal to meet the engine thermal management parameter requirements.

Description

Technical Field

[0001] The present application belongs to the field of semi-physical testing of thermal management of aviation gas turbine engine fuel systems, and in particular, to a semi-physical testing device for thermal management of an engine. Background Art

[0002] The semi-physical test of thermal management of the fuel system of a gas turbine engine is one of the important verification activities in the engine design process. By simulating the engine state, the changes in the pressure, temperature and internal return oil flow parameters of the fuel inside the fuel system when the engine inlet fuel temperature increases are obtained, supporting the subsequent whole machine test.

[0003] The adjustable installation device of a typical semi-physical test of engine thermal management is that the fuel in the fuel tank is heated to the test temperature by the fuel heating device and then enters the fuel system, passes through the fuel system's pumps, pipes, regulators, fuel oil radiators, nozzles, etc., and finally flows out of the fuel system. The high-temperature fuel flowing out of the fuel system is cooled by a water-cooled heat exchanger and then returned to the fuel tank for recycling. The fuel heating device is used to heat the fuel, the electric motor is used to simulate the speed of the fuel system pump, and the regulating device is used to simulate the engine fuel flow. To ensure the safety of the test, the electric heater of the fuel heating device does not directly heat the fuel, but indirectly heats the inlet fuel of the test piece through heat transfer oil and a heat exchanger. Usually, the fuel heating device is a more complex and dangerous system.

[0004] The centrifugal pump, gear pump, regulating device and other fuel accessories of the adjustable mounting device of the existing engine thermal management semi-physical test are consistent with the fuel accessories used for the engine, and the front and rear connection sequence is also consistent, but the relative position of each component is quite different from the actual installation position on the engine. The connecting pipes between each component need to be designed separately. Usually, the pipes are longer than the actual pipes on the engine, and the pipes dissipate more heat to the outside world, resulting in a certain error between the temperature test results of the semi-physical test and the temperature test results of the engine whole machine test. With the continuous improvement of the accuracy requirements of the engine thermal management test, the existing semi-physical test equipment has gradually failed to meet the test needs.

[0005] The existing adjustable installation device for semi-physical test of engine thermal management has the following defects and deficiencies:

[0006] 1. The actual installation position of fuel accessories such as centrifugal pumps, gear pumps, and regulating devices on the engine is not considered, and the connecting pipeline is quite different from the actual pipeline of the engine, resulting in test errors of temperature and pressure;

[0007] 2. Solve the problem that the fuel heating device has a complex structure and safety risks. Summary of the invention

[0008] In order to solve the above problems, the present application provides a semi-physical test device for engine thermal management, the test device comprising an oil supply circuit formed by an oil supply pipeline through a series connection of an oil supply tank, a water cooling radiator, a centrifugal pump, a fuel filter, a gear pump, a regulating device, a fuel oil radiator, a nozzle and the oil supply tank; an actuating device is connected in parallel between the centrifugal pump and the gear pump; the centrifugal pump and the gear pump are connected to the same engine casing for providing different speeds, and the engine casing is driven by a motor;

[0009] Among them, a fuel temperature detection device for detecting the oil temperature at the outlet is installed at the outlet of the water-cooled radiator. The water valve size of the water-cooled radiator is controlled by the oil temperature detected by the fuel temperature detection device so that the oil temperature at the outlet of the water-cooled radiator is maintained at a preset value;

[0010] The fuel supply tank and water cooling radiator are installed on the bench; the centrifugal pump, fuel filter, gear pump, engine casing, regulating device, actuating device, fuel and lubricating oil radiator and nozzle are installed on the engine barrel, and the engine barrel is installed on the bench through a bracket.

[0011] The technical effect of the above-mentioned technical features is that it eliminates the traditional method of heating the fuel and avoids the danger of directly heating the fuel. The present application simulates the speed of a real engine by using an engine casing, so that the fuel naturally heats up in the test device, and forms a negative feedback temperature control system through a water-cooled radiator and a temperature detection device, so that the test device maintains a preset test temperature, thereby more realistically simulating the working conditions of a real engine.

[0012] Preferably, the installation positions of the centrifugal pump, fuel filter, gear pump, engine casing, adjustment device, actuator, fuel and oil radiator and nozzle are the same as their positions on the real aircraft engine.

[0013] Preferably, the engine barrel comprises a real engine barrel or a proportional model of the engine barrel.

[0014] Preferably, the oil supply pipeline is a steel connecting pipe.

[0015] An engine thermal management semi-physical test method, using the engine thermal management semi-physical test adjustable installation device; the method comprises:

[0016] Close the water valve, adjust the motor speed to be consistent with the actual engine speed, and allow the fuel to circulate and heat up in the test device until the fuel temperature rises to a first preset temperature;

[0017] The water valve is opened, and the size of the water valve is automatically or manually controlled according to the oil temperature detected by the fuel temperature detection device so that the fuel temperature is maintained at a second preset value.

[0018] Preferably, the second preset value is a test target value, and the first preset value is 0.8 to 0.9 of the second preset value.

[0019] The advantages of the present application include: the present invention provides a semi-physical test method and device for engine thermal management that takes into account the actual installation position. The method aims at simulating the actual working state of the engine in the thermal management test of the engine fuel system, arranges the fuel system accessories on the engine barrel according to the actual installation position, uses an electric motor to simulate the actual speed of the engine, drives the centrifugal pump, gear pump and other fuel system accessories through a transmission device, and simulates the fuel flow signal of the engine through a controller to meet the control requirements of parameters such as fuel pressure, temperature, and flow.

[0020] The technical problems to be solved by the present invention are as follows:

[0021] 1. Solve the problem that the connection pipes of centrifugal pumps, gear pumps, regulating devices and other components are quite different from the actual pipes of the engine, and there are errors in temperature and pressure tests;

[0022] 2. Solve the problem that the fuel heating device has a complex structure and safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a connection diagram of the test device described in a preferred embodiment of the present application;

[0024] Figure 2 It is a connection diagram of the test device and the engine barrel according to a preferred embodiment of the present application;

[0025] Figure 3 This is a schematic diagram of the oil supply pipeline connection of a preferred embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the implementation of this application clearer, the technical scheme in the implementation of this application will be described in more detail in combination with the drawings in the implementation of this application. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described implementation is a part of the implementation of this application, not all of the implementations. The implementation described below with reference to the drawings is exemplary and is intended to be used to explain this application, and cannot be understood as a limitation on this application. Based on the implementation in this application, all other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The implementation of this application is described in detail below in combination with the drawings.

[0027] The present invention provides a semi-physical test method and device for engine thermal management taking into account the actual installation position. The method aims at simulating the actual working state of the engine in the thermal management test of the engine fuel system. The various components of the fuel system are arranged on the cylinder according to the actual installation position, and the actual speed of the engine is simulated by an electric motor. The fuel system accessories such as a centrifugal pump and a gear pump are driven by a transmission device. The fuel flow signal of the engine is simulated by a controller to meet the control requirements of parameters such as fuel pressure, temperature, and flow.

[0028] like Figure 1 As shown, the present application provides an adjustable installation device for semi-physical test of engine thermal management, wherein the test device is an oil supply circuit formed by an oil supply pipeline through a series connection of an oil supply tank, a water-cooled radiator, a centrifugal pump, a fuel filter, a gear pump, an adjustment device, a fuel oil radiator, a nozzle and the oil supply tank; an actuating device is connected in parallel between the centrifugal pump and the gear pump; the centrifugal pump and the gear pump are connected to the same engine casing for providing different speeds, and the engine casing is driven by a motor; wherein a fuel temperature detection device for detecting the oil temperature at the outlet is installed at the outlet of the water-cooled radiator, and the water valve size of the water-cooled radiator is controlled by the oil temperature detected by the fuel temperature detection device so that the oil temperature at the outlet of the water-cooled radiator is maintained at a preset value; the oil supply tank and the water-cooled radiator are installed on a bench; the centrifugal pump, the fuel filter, the gear pump, the engine casing, the adjustment device, the actuating device, the fuel oil radiator, and the nozzle are installed on the engine barrel, and the engine barrel is installed on the bench through a bracket. The engine barrel includes a real engine barrel or a proportional model of the engine barrel. The oil supply pipeline is a steel connecting pipe.

[0029] The technical effect of the above technical features is that the traditional method of heating the fuel is eliminated, and the danger of directly heating the fuel is avoided. The present application simulates the speed of the real engine by using the engine casing, so that the fuel is naturally heated and heated in the test device, and a negative feedback temperature regulation system is formed by a water-cooled radiator and a temperature detection device, so that the test device maintains a preset test temperature, and more realistically simulates the working condition of the real engine.

[0030] The engine thermal management semi-physical test method is carried out using the above-mentioned adjustable installation device for semi-physical test of engine thermal management, and the method comprises:

[0031] Close the water valve, adjust the motor speed to be consistent with the actual engine speed, and allow the fuel to circulate and heat up in the test device until the fuel temperature rises to a first preset temperature;

[0032] The water valve is opened, and the water valve is automatically or manually controlled according to the oil temperature detected by the fuel temperature detection device to keep the fuel temperature at a second preset value. The second preset value is the test target value, and the first preset value is 0.8 to 0.9 of the second preset value.

[0033] The following is combined with Figure 2 and Figure 3 To explain, Figure 2 Figure 3 As shown, the engine fuel system accessories include a centrifugal pump 2, a fuel filter 3, a gear pump 5, an engine casing 4, an adjustment device 6, a fuel radiator 8, an actuator 7 and a nozzle installed on the engine barrel 1 by welding, bolting or riveting, and the installation position of the engine fuel system accessories is consistent with its actual installation position on the engine; during the thermal management semi-physical test, the fuel accessories are connected with an oil supply pipeline, and the oil supply pipeline 10 is consistent with the actual fuel pipeline of the engine. The fuel in the fuel supply tank enters the centrifugal pump after passing through the water-cooled radiator. One end of the fuel supply pipeline 10 at the outlet of the fuel radiator is connected to the fuel nozzle. The nozzle to the fuel tank, the fuel tank to the water-cooled radiator, and the water-cooled radiator to the centrifugal pump are connected by steel connecting pipes, and the structure of the connecting pipe can be designed according to the layout of the test bench.

[0034] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A semi-physical test device for engine thermal management, characterized in that: The test device comprises: an oil supply circuit formed by an oil supply pipeline through an oil supply tank, a water cooling radiator, a centrifugal pump, a fuel filter, a gear pump, a regulating device, a fuel oil radiator, a nozzle and the oil supply tank in series in sequence; an actuating device is connected in parallel between the centrifugal pump and the gear pump; the centrifugal pump and the gear pump are connected to the same engine casing for providing different speeds, and the engine casing is driven by a motor; Among them, a fuel temperature detection device for detecting the oil temperature at the outlet is installed at the outlet of the water-cooled radiator. The water valve size of the water-cooled radiator is controlled by the oil temperature detected by the fuel temperature detection device so that the oil temperature at the outlet of the water-cooled radiator is maintained at a preset value; The fuel supply tank and water cooling radiator are installed on the bench; the centrifugal pump, fuel filter, gear pump, engine casing, regulating device, actuating device, fuel and lubricating oil radiator and nozzle are installed on the engine barrel, and the engine barrel is installed on the bench through a bracket.

2. The semi-physical test device for engine thermal management according to claim 1, characterized in that: The installation positions of the centrifugal pump, fuel filter, gear pump, engine casing, adjustment device, actuator, fuel and oil radiator and nozzle are the same as those on the real aircraft engine.

3. The semi-physical test device for engine thermal management according to claim 1, characterized in that: The engine cylinder includes a real engine cylinder or a proportional model of the engine cylinder.

4. The semi-physical test device for engine thermal management according to claim 1, characterized in that: The oil supply pipeline is a steel connecting pipe.

5. A semi-physical test method for engine thermal management, using the semi-physical test device for engine thermal management as claimed in any one of claims 1 to 4; the method comprising: Close the water valve, adjust the motor speed to be consistent with the actual engine speed, and allow the fuel to circulate and heat up in the test device until the fuel temperature rises to a first preset temperature; The water valve is opened, and the size of the water valve is automatically or manually controlled according to the oil temperature detected by the fuel temperature detection device so that the fuel temperature is maintained at a second preset value.

6. The semi-physical test method for engine thermal management according to claim 5, characterized in that: The second preset value is the test target value, and the first preset value is 0.8-0.9 of the second preset value.

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