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Fuel metering device with redundant standby and undisturbed switching functions

A technology of non-disturbance switching and redundant backup, applied in the direction of measurement device, measurement capacity, volume measurement instrument/method, etc., can solve the problems of aero-engine performance impact and large disturbance, and achieve complete functions, high reliability and simple structure. Effect

Active Publication Date: 2017-03-15
BEIJING HANGKE ENGINE CONTROL SYST SCI & TECH
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  • Abstract
  • Description
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Problems solved by technology

[0003] The traditional fuel metering device, when switching between the main control and the backup, has a large disturbance, which has a certain impact on the performance of the aero-engine

Method used

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  • Fuel metering device with redundant standby and undisturbed switching functions

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Embodiment Construction

[0012] The present invention will be further described in detail below in conjunction with examples, but the embodiments of the present invention are not limited thereto.

[0013] The present invention will be described in further detail below. see figure 1 .

[0014] A fuel metering device with redundant backup and non-disturbance switching of the present invention includes an oil filter 1, a stepping motor 2, a displacement sensor 3, a backup metering valve 4, a main control metering valve 5, and an equal pressure difference valve 6, Lock valve 7, micro switch 8, fuel inlet 9, fuel outlet 10, fuel outlet 2 11, oil needle 12 and switch baffle 13;

[0015] Among them, the oil filter 1 is set at the outlet of the fuel booster pump to filter the fuel from the fuel booster pump, and the filtered fuel enters the backup metering valve 4 through the fuel inlet 9, and the backup metering valve 4 is provided with a switch baffle 13 , the switch baffle 13 can be rotated manually, an...

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Abstract

The invention relates to a fuel metering device with redundant standby and undisturbed switching functions. The fuel metering device comprises an oil filter (1), a stepping motor (2), a displacement sensor (3), a standby metering valve (4), a main control metering valve (5), a constant differential pressure valve (6), a locking valve (7), a microswitch (8), a fuel inlet (9), a fuel outlet I (10), a fuel outlet II (11), an oil pointer (12) and a switch baffle plate (13). The fuel metering device has the advantages that the redundant design of the fuel metering device is realized by fewer parts and simpler structure; the functions are complete, and the reliability is high.

Description

technical field [0001] The invention belongs to the field of fuel oil control of aero-engines, and in particular relates to a fuel metering device which has redundant backup and can be switched without disturbance. Background technique [0002] At present, the fuel control system of aero-engines has gradually changed from the traditional mechanical hydraulic system to full-authority digital control. In order to improve its reliability, many products have adopted a redundant design method for the fuel metering device of the fuel control system, that is, fuel metering The device is equipped with a backup metering device. When the main control metering device fails, the backup metering system can be used to complete the (short-time) fuel metering function to ensure the reliability and safety of the engine. [0003] In the traditional fuel metering device, when the main control and backup are switched, the disturbance is relatively large, which has a certain impact on the perfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F22/02G05B9/05
CPCG01F22/02G05B9/05
Inventor 袁鹏杨惠英
Owner BEIJING HANGKE ENGINE CONTROL SYST SCI & TECH
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