An aero-engine start and stop mechanical control safety device
An aero-engine and safety device technology, which is applied in the direction of engine starting, engine components, engine ignition, etc., can solve the problems of engine starting failure, engine ground or air parking, and being in an open state, so as to facilitate miniaturization and reduce accidents rate and improve reliability
Active Publication Date: 2021-11-05
BEIJING HANGKE ENGINE CONTROL SYST SCI & TECH
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Problems solved by technology
Mechanical backup control is to control the working state of the engine by manually operating the throttle lever when the numerical control system fails or actively switches to mechanical control. At this time, the throttle lever should be in the closed state when the engine is started (that is, the fuel metering valve is in the minimum flow state). Start with the lever open, rich oil overheating may cause the engine to fail to start; when the engine is working normally, the throttle lever is in the open state, if the parking action is misoperated, the engine may stop on the ground or in the air
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[0019] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. For simplicity, some technical features known to those skilled in the art are omitted from the following description.
[0020] The aero-engine starting and parking mechanical control safety device of the present invention comprises a starting safety device, a parking safety device, an emergency stop device and an throttle lever 1 . Such as figure 1 As shown, the emergency stop device includes an electric parking valve 5, an emergency stop switch 8, and a power supply 7 connected in series, while the electric parking valve 5 is connected in parallel in the digital electronic control circuit 6; the starting safety device includes a starting safety mechanism 2 and a starting switch 3. The electric parking valve 5 and the power supply 7 ar...
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The invention relates to the field of aircraft engine control, in particular to an engine start and stop mechanical control insurance device. The aviation start-up and stop mechanical control safety device of the present invention comprises a start-up safety device, a parking safety device, an emergency stop device and an throttle lever. The starting safety device, parking safety device and emergency parking device work independently of each other, but share the power supply and electric parking valve located in the emergency parking device, and the starting safety device is connected in series with the throttle lever and the electric parking valve, and the three work together to control the starting , to realize that the fuel-rich start of the engine is prohibited when the throttle lever is opened, and the parking safety device is connected in series with the throttle lever and the electric parking valve. The device of the invention can effectively reduce the occurrence rate of accidents, improve the safety and reliability of the mechanical backup control of the aero-engine, and has a compact structure and a high degree of integration.
Description
technical field [0001] The invention relates to the field of aeroengine control, in particular to the design of an engine start and stop mechanical control safety device. Background technique [0002] In order to improve the safety and reliability of aero-engine control, the digital electronic control system usually adopts a dual-redundancy design, that is, by increasing the hot backup of the numerical control system to improve the reliability of the engine's work, and in the face of high-intensity electromagnetic countermeasures, increasing the mechanical Backup control increases engine extreme survivability. Mechanical backup control is to control the working state of the engine by manually operating the throttle lever when the numerical control system fails or actively switches to mechanical control. At this time, the throttle lever should be in the closed state when the engine is started (that is, the fuel metering valve is in the minimum flow state). Start with the lev...
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IPC IPC(8): F02C9/26F02C7/26
CPCF02C7/26F02C9/26
Inventor 袁树峥李学明刘洋付居岳廖远洋颜秋英周秀清
Owner BEIJING HANGKE ENGINE CONTROL SYST SCI & TECH