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Engine mechanical hydraulic fuel flow auxiliary metering adjusting device

A technology of mechanical hydraulic and regulating devices, which is applied in the direction of engine components, gas turbine devices, machines/engines, etc., can solve the problems of engine fuel-rich flameout, high-altitude adaptability and safety reduction of mechanical hydraulic fuel regulators, etc., to achieve universal application sexual effect

Active Publication Date: 2017-08-18
BEIJING HANGKE ENGINE CONTROL SYST SCI & TECH
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Problems solved by technology

However, with the improvement of the performance of the aero-engine and the increase of the flight altitude, it is not feasible to only set the minimum fuel limit, especially in the high altitude, the required fuel flow is less than the fuel required on the ground, if only the minimum displacement of the oil needle Immobilized, unassisted fuel metering may also result in engine rich stalls, making mechanical hydraulic fuel regulators less suitable for altitude and less safe

Method used

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  • Engine mechanical hydraulic fuel flow auxiliary metering adjusting device

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Embodiment Construction

[0019] see figure 1 , The engine mechanical hydraulic fuel flow auxiliary metering adjustment device of the present invention includes an air pressure sensor 1 , a first metering valve 2 , a second metering valve 3 , an auxiliary fuel oil circuit 6 , and a minimum displacement stop rod 7 . Wherein, the auxiliary fuel oil passage 6 communicates with the main fuel oil passage. The first metering valve 2 is arranged in the auxiliary fuel oil passage 6 and rigidly connected with the air pressure sensor 1 . The second metering valve 3 is arranged at the outlet of the auxiliary fuel oil circuit 6 and merges with the oil needle outlet of the main fuel oil circuit. Under the action of air pressure at different altitudes, the air pressure sensor 1 will produce different displacements and drive the first metering valve 2 to move, controlling the first fuel metering of the auxiliary fuel oil circuit.

[0020] In addition, the second metering valve 3 is rigidly connected with the minimu...

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Abstract

The invention belongs to the engine fuel technology and particularly relates to an engine mechanical hydraulic fuel flow auxiliary metering adjusting device. The engine mechanical hydraulic fuel flow auxiliary metering adjusting device comprises an air pressure sensor (1), a first metering valve (2), a second metering valve (3) and an auxiliary fuel way (6). According to the engine mechanical hydraulic fuel flow auxiliary metering adjusting device, an automatic auxiliary metering device sensing the air state of the outside atmosphere is added to assist in metering of fuel flow of a fuel regulator, and thus the fuel metering precision of the engine mechanical hydraulic type fuel regulator can be improved effectively. Meanwhile, two adjusting screws can both achieve metering adjustment, the high-altitude adaptability of a mechanical hydraulic type fuel control unit is improved, the minimum fuel quantity of engine fuel is ensured, and large practical application value is achieved.

Description

technical field [0001] The invention belongs to engine fuel technology, in particular to an engine mechanical hydraulic fuel flow auxiliary metering and adjusting device. Background technique [0002] In aviation products, the fuel regulator is an important part of the aircraft engine control system. In the mechanical hydraulic fuel regulator, generally only the minimum displacement stop of the oil needle is set to limit the minimum fuel flow and prevent the engine from stalling due to poor fuel. Such a structure is simple and easy to implement. However, with the improvement of the performance of the aero-engine and the increase of the flight altitude, it is not feasible to only set the minimum fuel limit, especially in the high altitude, the required fuel flow is less than the fuel required on the ground, if only the minimum displacement of the oil needle Immobilized, unassisted fuel metering may also result in engine rich stalls, reducing the altitude suitability and saf...

Claims

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Application Information

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IPC IPC(8): F02C9/28
CPCF02C9/263F02C9/28
Inventor 毛碧波杨惠英刘雪娇董文武
Owner BEIJING HANGKE ENGINE CONTROL SYST SCI & TECH
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