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Direct acting fuel oil metering device and metering method thereof

A metering device and fuel technology, which is applied to gas turbine devices, jet propulsion devices, fuel valves of turbine/propulsion devices, etc., can solve the problems of uncertain inlet and outlet pressure of fuel metering devices, and achieve small external influence factors and control accuracy. High and simple device structure

Pending Publication Date: 2017-08-22
西安成立航空制造有限公司
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AI Technical Summary

Problems solved by technology

Under such circumstances, the inlet and outlet pressures of the fuel metering device in the engine are uncertain

Method used

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  • Direct acting fuel oil metering device and metering method thereof
  • Direct acting fuel oil metering device and metering method thereof
  • Direct acting fuel oil metering device and metering method thereof

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Embodiment Construction

[0028] The technical solution of this patent will be further described in detail below in conjunction with specific embodiments.

[0029] see Figure 1-5 , a direct-acting fuel metering device, including a pipeline delivery system 1, a high-temperature oval gear flowmeter system 2, an equivalent valve metering system 3 and a direct equal-pressure valve control system 4.

[0030] The pipeline delivery system 1 is a round pipe firmly connected with each system by various joints.

[0031] The pipeline transportation system 1 includes No. 1 pipe 111, No. 2 pipe 112, No. 3 pipe 113, No. 4 pipe 114, No. 5 pipe 115, No. 6 pipe 116, No. 7 pipe 117, No. 8 pipe 118, No. 9 pipe Tube 119, tube ten 1110 and tube eleven 1111.

[0032] The high-temperature oval gear flowmeter system 2 includes two end fittings 5, a housing 6, two elliptical leaf-shaped gears 7 that move vertically with each other, two shafts 8, four bearings 9, an end cover and a metering display 10 The end joints 5 are i...

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Abstract

The invention discloses a direct acting fuel oil metering device. The direct acting fuel oil metering device comprises a pipeline conveying system, a high-temperature type oval gear flowmeter system, an equivalent valve metering system and a direct constant pressure difference valve control system. The direct acting fuel oil metering device is simple in structure, obvious in effect and high in reliability. The high-temperature type oval gear flowmeter system is adopted, the control precision is high, and the device is hardly influenced by outside influential factors. The spherical equivalent valve metering system and the direct constant pressure difference valve control system are adopted to cooperatively control the oil pressure and the flow rate of fuel oil. A fuel oil flow control mode is adopted, and the constant pressure difference effect is achieved mainly on the basis of adjusting the opening degree of an oil return window of the direct constant pressure difference valve control system to convey surplus oil flow output by a fuel oil pump back to an inlet of the pump. No amplifier element is arranged, and a constant pressure difference valve doubles as a metering element and an actuating element, so that the steady state error is large, however, the device is simple in structure and high in reliability, and the direct acting fuel oil metering device can be widely applied to aircraft engines of which the required accuracy is not high.

Description

technical field [0001] The invention relates to the technical test field of an aero-engine fuel injection system, in particular to a direct-acting fuel metering device and a metering method thereof. Background technique [0002] At present, in the field of aviation, aero-engines are generally very expensive, and research on aero-engine fuel metering devices has become a current technical improvement issue. The continuous development of modern aero-engines puts forward higher requirements on the control performance of the engines. The increase of control functions and the improvement of control precision make the requirements for the control system higher and higher. Aircraft engines often work at the margin of safety. If the fuel flow cannot be precisely controlled, the working state of the engine may exceed the safety margin, resulting in serious consequences of engine damage or even aircraft crash. In general, it is relatively easy to control the fuel flow of the engine,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02C7/22F02C7/232F02C9/26G01F1/20
CPCF02C7/22F02C7/222F02C7/232F02C9/26F02C9/263G01F1/20
Inventor 张永姬宁宁王康王鹏景永平张晓明
Owner 西安成立航空制造有限公司
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