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A starting exhaust device for aero-engine fuel control system

An aero-engine and fuel control technology, which is applied in the directions of engine starting, engine ignition, engine components, etc., can solve the problems of increasing engine maintenance costs, simple structure, poor automation, etc., and achieves reduced maintenance costs, simple structure, and reduced work. amount of effect

Inactive Publication Date: 2017-06-16
BEIJING HANGKE ENGINE CONTROL SYST SCI & TECH
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  • Claims
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AI Technical Summary

Problems solved by technology

This type of starting exhaust device has a simple structure but poor automation. It needs to use special tooling to manually open the starting exhaust device, which increases the maintenance cost of the engine.

Method used

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  • A starting exhaust device for aero-engine fuel control system

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Embodiment Construction

[0013] The technical solution will be described in further detail below in conjunction with the accompanying drawings. see figure 1 .

[0014] A starting exhaust device for an aircraft engine fuel control system, said starting exhaust device is located at the top of the aircraft engine fuel control system, which includes a spring 1, a valve 2, a rubber pad 3, a protrusion 4, a piston 5, and a bush 6 , sealing ring 7. A cavity is opened in the housing, and the bushing 6 is installed in the cavity, and a sealing ring 7 is arranged between the bushing 6 and the housing; a groove is arranged on the top of the valve 2, and a rubber pad 3 is installed in the groove, and the rubber pad 3 is installed in the groove. Pad 3 is press-fitted on one opening end of bushing 6, and there is a gap on the peripheral surface of valve 2 connecting the low-pressure oil in the fuel tank and the cavity between valve 2 and piston 5; There is a piston 5, and the protrusion 4 is fixed on the end of ...

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Abstract

The invention belongs to the field of aero-engine fuel control, and relates to a starting exhaust device for an aero-engine fuel control system. There is a cavity in the casing, the bushing (6) is installed in the cavity, a sealing ring (7) is arranged between the bushing (6) and the casing, a groove is arranged on the top of the valve (2), and the groove A rubber pad (3) is installed inside, and the rubber pad (3) is press-fitted on an open end of the bush (6), and gaps are provided around the groove on the valve (2); the bush ( 6) A piston (5) is installed outside the other open end, and a protrusion (4) is arranged on the end surface of the piston (5) close to the valve (2), and the bush (6) and the piston (5), the piston ( 5) and the valve (2) are respectively provided with a spring (1), and a sealing ring (7) is provided between the outer end of the piston (5) and the housing. A starting exhaust device with simple structure, which can be opened and closed automatically with the change of servo pressure is proposed.

Description

technical field [0001] The invention belongs to the field of aero-engine fuel control and relates to the improvement of a starting exhaust device. Background technique [0002] When the fuel control system of an aero-engine is started, the mixed air in the cavity needs to be evacuated, which requires a starting exhaust device to be installed in the fuel control system. The traditional starting exhaust device is a simple ball valve. When starting, pressurized oil is passed through the fuel control system. Special tooling is used to manually open the ball valve to discharge the fuel mixed with air out of the fuel control system. This form of starting exhaust device has a simple structure but poor automation, and special tooling is required to manually open the starting exhaust device, which increases the maintenance cost of the engine. Contents of the invention [0003] The technical problem to be solved by the invention is to provide a starting exhaust device with simple s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02C7/232F02C7/26
Inventor 袁鹏杨惠英
Owner BEIJING HANGKE ENGINE CONTROL SYST SCI & TECH
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