Oil supply device of APU system

Abstract

The utility model relates to an oil supply device, in particular to an oil supply device of an APU system. Comprising an auxiliary fuel tank, an APU fuel pump, a fuel filter, a low fuel pressure sensor and a fuel controller. An oil inlet of the auxiliary oil tank is connected with a main engine oil supply pipeline through a first APU oil supply pipeline; an oil outlet of the auxiliary oil tank is connected with an oil inlet of the APU fuel pump, an oil outlet of the APU fuel pump is connected with an oil inlet of the fuel filter through a second APU oil supply pipeline, an oil outlet of the fuel filter is connected with an oil inlet of the fuel controller through a third oil supply pipeline, and an oil outlet of the fuel controller is connected with an oil inlet of the APU system; the low fuel oil pressure sensor is fixedly installed in the middle of the third oil supply pipeline. The auxiliary fuel tank, the APU fuel pump, the fuel filter, the low fuel pressure sensor and the fuel controller are additionally arranged, fuel is provided for the APU system, and it is ensured that the additionally-arranged APU system can work normally.

Description

Technical Field

[0001] The utility model relates to an oil supply device, in particular to an APU system oil supply device. Background Art

[0002] In the aviation field, the auxiliary power unit (APU) plays a vital role as an important component of the aircraft; the main function of the APU is to provide electricity and compressed air to the aircraft when the main engine of the aircraft is not running, ensuring that the aircraft can maintain the operation of key systems during the ground phase or in an emergency in the air, including but not limited to cockpit lighting, air conditioning system, and power supply for electronic equipment. This system significantly improves the autonomy and flexibility of the aircraft and reduces dependence on external ground equipment.

[0003] However, not all aircraft models are equipped with an APU system. In order to improve the aircraft's safety performance and air emergency response capabilities, it is usually necessary to additionally install an APU system on models that do not have an APU system. Therefore, it is urgently necessary to provide a device that can supply oil to the APU system after the APU system is installed. Utility Model Content

[0004] The utility model aims to solve the technical problem that some existing models need to supply oil to the APU system after the APU system is installed, and provides an APU system oil supply device.

[0005] In order to solve the above technical problems, the technical solutions provided by the utility model are as follows:

[0006] An APU system fuel supply device includes an auxiliary fuel tank, an APU fuel pump, a fuel filter, a low fuel pressure sensor and a fuel controller;

[0007] The oil inlet of the auxiliary oil tank is connected to the main engine oil supply pipeline through the first APU oil supply pipeline; the oil outlet of the auxiliary oil tank is connected to the oil inlet of the APU fuel pump, the oil outlet of the APU fuel pump is connected to the oil inlet of the fuel filter through the second APU oil supply pipeline, the oil outlet of the fuel filter is connected to the oil inlet of the fuel controller through the third oil supply pipeline, and the oil outlet of the fuel controller is connected to the oil inlet of the APU system;

[0008] The low fuel pressure sensor is fixedly installed in the middle of the third fuel supply pipeline.

[0009] Furthermore, the first APU oil supply pipeline is connected to the main engine oil supply pipeline via a three-way interface.

[0010] Furthermore, the auxiliary oil tank is an aluminum round tube, and a first flange interface and a second flange interface are provided on the aluminum round tube. The first flange interface is the oil inlet of the auxiliary oil tank, and the second flange interface is the oil outlet of the auxiliary oil tank.

[0011] Furthermore, the auxiliary oil tank has a capacity of 6L and a maximum pressure resistance of 0.6MPa.

[0012] Furthermore, the maximum flow rate of the APU fuel pump is 1500L / h.

[0013] Furthermore, the filtering accuracy of the fuel filter is 10 μm.

[0014] Furthermore, a fuel solenoid valve is provided on the second APU oil supply pipeline.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The APU system fuel supply device provided by the utility model is convenient for providing sufficient fuel flow with sufficient pressure for the APU system by arranging an auxiliary fuel tank and an APU fuel pump; by arranging a fuel filter, it is convenient for filtering impurities in the fuel to meet the fuel requirements of the APU system; by arranging a low fuel pressure sensor and a fuel controller, it is convenient for monitoring the fuel supply pressure of the APU fuel pump through the low fuel pressure sensor, and feeding back the pressure signal to the fuel controller, and the fuel controller adjusts the fuel pressure and fuel quantity.

[0017] 2. The APU system oil supply device provided by the utility model can ensure the smooth flow of the oil supply pipeline when the APU system is working normally, and can also ensure that the oil supply pipeline can be quickly cut off when the APU system needs to be extinguished, by setting a fuel solenoid valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0019] Explanation of the reference numerals: 1 is an auxiliary fuel tank, 2 is an APU fuel pump, 3 is a fuel filter, 4 is a low fuel pressure sensor, 5 is a fuel controller, 6 is a first APU fuel supply pipeline, 7 is a main engine fuel supply pipeline, 8 is a second APU fuel supply pipeline, 9 is a third fuel supply pipeline, 10 is an APU system, 11 is a three-way interface, and 12 is a fuel solenoid valve. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] like Figure 1As shown, an APU system fuel supply device includes an auxiliary fuel tank 1, an APU fuel pump 2, a fuel filter 3, a low fuel pressure sensor 4 and a fuel controller 5;

[0022] The oil inlet of the auxiliary oil tank 1 is connected to the main engine oil supply pipeline 7 through the first APU oil supply pipeline 6; the oil outlet of the auxiliary oil tank 1 is connected to the oil inlet of the APU fuel pump 2, and the maximum flow of the APU fuel pump 2 is 1500L / h to ensure that the fuel inlet pressure and fuel flow meet the APU requirements; the oil outlet of the APU fuel pump 2 is connected to the oil inlet of the fuel filter 3 through the second APU oil supply pipeline 8, and the filtration accuracy of the fuel filter 3 is 10μm, which is used to filter the metal particles that may be generated by the fuel pump and the solenoid valve to meet the APU's filtration accuracy requirements for fuel; the oil outlet of the fuel filter 3 is connected to the oil inlet of the fuel controller 5 through the third oil supply pipeline 9, and the oil outlet of the fuel controller 5 is connected to the oil inlet of the APU system 10;

[0023] The low fuel pressure sensor 4 is fixedly installed in the middle of the third fuel supply pipeline 9, and is used to monitor the fuel pressure inside the third fuel supply pipeline 9 and transmit the pressure signal to the fuel controller 5. The fuel controller 5 adjusts the fuel pressure and flow entering the APU system 10 according to the pressure signal.

[0024] like Figure 1 As shown, the first APU oil supply pipeline 6 is connected to the main engine oil supply pipeline 7 through a three-way interface 11.

[0025] like Figure 1 As shown, the auxiliary oil tank 1 is an aluminum round tube, and a first flange interface and a second flange interface are provided on the aluminum round tube. The first flange interface is the oil inlet of the auxiliary oil tank 1, and the second flange interface is the oil outlet of the auxiliary oil tank 1. The volume of the auxiliary oil tank 1 is 6L, and the maximum pressure is 0.6MPa.

[0026] like Figure 1 As shown, in order to ensure the fire safety of the APU system 10, a fuel solenoid valve 12 is provided on the second APU oil supply pipeline 8; it can ensure the smooth flow of the oil supply pipeline when the APU system 10 is working normally, and can ensure that the oil supply pipeline can be quickly cut off when the APU system 10 needs to be extinguished.

[0027] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or replacements within the technical scope disclosed in the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An APU system oil supply device, characterized in that: It includes an auxiliary fuel tank (1), an APU fuel pump (2), a fuel filter (3), a low fuel pressure sensor (4) and a fuel controller (5); The oil inlet of the auxiliary oil tank (1) is connected to the main engine oil supply pipeline (7) through the first APU oil supply pipeline (6); the oil outlet of the auxiliary oil tank (1) is connected to the oil inlet of the APU fuel pump (2); the oil outlet of the APU fuel pump (2) is connected to the oil inlet of the fuel filter (3) through the second APU oil supply pipeline (8); the oil outlet of the fuel filter (3) is connected to the oil inlet of the fuel controller (5) through the third oil supply pipeline (9); the oil outlet of the fuel controller (5) is connected to the oil inlet of the APU system (10); The low fuel pressure sensor (4) is fixedly installed in the middle of the third fuel supply pipeline (9).

2. The APU system oil supply device according to claim 1, characterized in that: The first APU oil supply pipeline (6) is connected to the main engine oil supply pipeline (7) via a three-way interface (11).

3. The APU system oil supply device according to claim 1, characterized in that: The auxiliary oil tank (1) is an aluminum round tube, on which a first flange interface and a second flange interface are provided, the first flange interface being the oil inlet of the auxiliary oil tank (1), and the second flange interface being the oil outlet of the auxiliary oil tank (1).

4. The APU system oil supply device according to claim 1, characterized in that: The auxiliary oil tank (1) has a capacity of 6L and a maximum pressure resistance of 0.6MPa.

5. The APU system oil supply device according to claim 1, characterized in that: The maximum flow rate of the APU fuel pump (2) is 1500 L / h.

6. The APU system oil supply device according to claim 1, characterized in that: The filtration accuracy of the fuel filter (3) is 10 μm.

7. The APU system oil supply device according to claim 1, characterized in that: The second APU oil supply pipeline (8) is provided with a fuel solenoid valve (12).

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