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Method and system for improving starting success rate of aero-engine on plateau

A technology for aero-engine and engine starting, applied in the direction of machines/engines, mechanical equipment, gas turbine devices, etc.

Active Publication Date: 2020-11-27
SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of this application is to provide a method and system for improving the success rate of aero-engine plateau starting, so as to solve or alleviate at least one of the problems in the background technology

Method used

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  • Method and system for improving starting success rate of aero-engine on plateau
  • Method and system for improving starting success rate of aero-engine on plateau

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1: The method and system of the present application will be described below by taking the process of starting the left engine of the aircraft at a plateau as an example.

[0054] When the aircraft is at a plateau, before starting the left engine, first set the plateau state switching switch 11 to the "plateau" position to generate a high-voltage state signal, and set the hydraulic unloading switch 15 to the "on" position so that the electromechanical integrated management system 14 can control the hydraulic system hydraulic pump. Then start the left engine, and the electromechanical integrated management system 14 comprehensively judges according to the signals of the wheel load sensor 12, the rotational speed sensor 131 and the engine start switch 132, and judges that the conditions are as follows:

[0055] a) Plateau state switching switch 11 is in the "plateau" position;

[0056] b) The wheel load sensor 12 detects that the aircraft is in a loading state ...

Embodiment 2

[0061] Embodiment 2: The method and system of the present application will be described below by taking the process of starting the right engine of the aircraft at a plateau as an example.

[0062] When the aircraft is at a plateau, before starting the right engine, first set the plateau state switching switch 11 to the "plateau" position to generate a plateau state signal, and set the hydraulic unloading switch 15 to the "on" position so that the electromechanical integrated management system Can control the hydraulic system hydraulic pump. Then start the right engine, and the electromechanical integrated management system judges comprehensively according to the signals of the wheel load sensor 12, the rotational speed sensor 131 and the engine start switch 132, and judges the conditions as follows:

[0063] a) Plateau state switching switch 11 is in the "plateau" position;

[0064] b) The wheel load sensor 12 detects that the aircraft is in a loading state (unloading and lo...

Embodiment 3

[0069] Embodiment 3: The prevention of unloading by mistake after the left and right engines are started successfully will be described below in conjunction with the method and system of the present application.

[0070] In order to prevent accidental unloading of I and II hydraulic systems 16 / 17 after the engine is successfully started, a single-pole hydraulic unloading switch 15 containing two sets of contacts is provided in this application, and the I hydraulic system at the output end of the electromechanical integrated management system 14 The unloading control cable and the II hydraulic system unloading control cable are respectively connected to two sets of contacts of the switch. When the left and right engines are started successfully, set the switch to the "OFF" position to realize simultaneous disconnection of the I and II hydraulic systems, so as to ensure that the I and II hydraulic systems will not be unloaded by mistake and improve System reliability.

[0071] ...

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Abstract

The invention provides a method and system for improving the starting success rate of an aero-engine on a plateau, and belongs to the technical field of aero-engine control. The method comprises the steps that a plateau state signal, a wheel load signal, a high-pressure rotor speed signal and an engine starting signal are obtained; whether an aircraft is in a plateau state or not is judged according to the plateau state signal, whether the aircraft is in a ground state or not is judged according to the wheel load signal, and whether an engine is in a starting state or not is judged according to the high-pressure rotor speed signal and the engine starting signal; and when the conditions that the aircraft is in the plateau state and the ground state, and the engine is in the starting state are judged to be met at the same time, a hydraulic system corresponding to the engine on the current side is unloaded. Through the method of the invention, the starting success rate of the aero-engineunder the plateau environment can be improved.

Description

technical field [0001] The application belongs to the technical field of aero-engine control, and in particular relates to a method and a system for improving the success rate of an aero-engine starting at a plateau. Background technique [0002] At present, domestic traditional aircraft generally have the need to take off and land on plateaus. However, the air in plateau areas is thin and the air pressure is low, which reduces the air flow and output power when the engine starts, making it difficult to start the engine. In recent years, problems such as large engine dispersion, high exhaust temperature, and long start-up time have been exposed when aircraft are started at plateaus, which have seriously affected the start-up performance of the aircraft. Contents of the invention [0003] The purpose of this application is to provide a method and system for improving the success rate of aero-engine starting at high altitude, so as to solve or alleviate at least one problem ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02C9/00F02C7/27
CPCF02C9/00F02C7/27
Inventor 辛军锜董世良张波马欢王冲
Owner SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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