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Indirect effect type fuel metering device and metering method thereof

A metering device and fuel oil technology, which is applied in the direction of volume/mass flow generated by mechanical effects, fluid flow detection by measuring pressure difference, etc., can solve problems such as uncertain pressure at the inlet and outlet of fuel metering devices, and achieve simple structure and high opening stroke Small, high-precision control effect

Pending Publication Date: 2017-08-18
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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  • Indirect effect type fuel metering device and metering method thereof
  • Indirect effect type fuel metering device and metering method thereof
  • Indirect effect type fuel metering device and metering method thereof

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Embodiment Construction

[0029] The technical solution of this patent will be further described in detail below in conjunction with specific embodiments.

[0030] see Figure 1-5 , an indirect-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 an indirect equal-pressure valve control system 4.

[0031] The pipeline delivery system 1 is a circular pipe connected with various systems by various joints.

[0032] 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 Pipe 119, No. 10 pipe 1110, No. 11 pipe 1111, No. 12 pipe 1112, No. 13 pipe 1113, No. 14 pipe 1114, No. 15 pipe 1115, No. 16 pipe 1116, No. 17 pipe 1117, No. 18 pipe 1118 and No. 19 pipe 1119.

[0033] The high-temperature oval gear flowmeter system 2 includes a joint at both ends 5, a casing 6, two ellip...

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Abstract

The invention discloses an indirect effect type fuel metering device which comprises a pipeline delivery system, a high-temperature oval gear flowmeter system, an equivalent valve metering system and an indirect constant differential pressure valve control system. The indirect effect type fuel metering device is simple in structure and small in opening degree stroke, steady-state errors are effectively decreased, and the indirect effect type fuel metering device is high in reliability. In addition, the high-temperature oval gear flowmeter system is adopted, the control precision is high, and outside influence factors are small. Furthermore, when the spherical equivalent valve metering system and the indirect constant differential pressure valve control system are matched to control pressure and flow of fuel, meanwhile fuel flow control mainly relies on that the stroke of a main piston is controlled by a differential pressure valve, accordingly input flow of an oil port is changed, the purpose of stably metering previous and later differential pressures of the valve, the opening stroke of the differential pressure valve is smaller in the mode, and accordingly steady-state errors can be effectively decreased. The device can be widely applied to aero-engines needing high precision.

Description

technical field [0001] The invention relates to the technical test field of an aero-engine fuel injection system, in particular to an indirect-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 engi...

Claims

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Application Information

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IPC IPC(8): G01F1/36
CPCG01F1/36
Inventor 景永平姬宁宁张永郝晓波王鹏张晓明
Owner 西安成立航空制造有限公司
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