Helicopter engine starting device and method in plateau environment

Abstract

The invention belongs to a helicopter design technology, and particularly relates to a helicopter engine starting device and method in a plateau environment. According to the helicopter engine starting method in the plateau environment, an auxiliary power device is selected to generate power to provide starting energy for a helicopter engine, when the engine is started, an electronic controller ofthe auxiliary power device is triggered at the same time, the electronic controller of the auxiliary power device instantly outputs larger current to a fuel servo control device, the fuel servo control device is controlled to compensate fuel flow to the auxiliary power device, and rotation speed fluctuation is reduced. According to the helicopter engine starting device and method in the plateau environment, a helicopter engine starting technology is optimized, an improved scheme of a helicopter engine starting energy source is provided, the operation is simple and convenient, the implementation is convenient, the electric power input capability and the regulation performance of the engine starting are improved through the use verification of plateau and low-temperature environments, the function and the performance are reliable, and the technical problem of difficult helicopter engine starting in plateau, high and low-temperature environments in the prior art is solved.

Description

technical field [0001] The invention belongs to the helicopter design technology, and in particular relates to a starting device and an optimization method for a helicopter engine in a plateau environment. Background technique [0002] my country has a vast territory and complex terrain. The Qinghai-Tibet Plateau, with an average altitude of 4000m, covers an area of ​​2.4 million square kilometers, accounting for one of the country's land areas. The air in the plateau area is thin, the atmospheric pressure and density are low, and there is severe hypoxia. Plateau helicopters, especially the engine plateau start and related systems have been an important direction of helicopter research. [0003] In plateau and low temperature environment, when the helicopter engine starts, it is prone to start overheating or start suspension phenomenon, resulting in engine starting failure or a serious reduction in the success rate of starting, which affects the helicopter's mission attenda...

AI Technical Summary

Problems solved by technology

[0004] Before the optimization of the starting technology, the helicopter engine was directly started by the battery or the auxiliary power unit was used to start the engine. For example, RU2018142889 gave the battery to start the engine. However, the starting procedure is not perfect, and various technical problems cannot meet the use requirements of plateau helicopters.

If the battery cannot guarantee the starting energy demand of the engine in plateau and low temperature environment, the auxiliary power unit is prone to large speed fluctuations, resulting in under-frequency or over-frequency protection of the generator. The heat of the engine can easily lead to compressor surge and start overheating. When the engine is cold started, it will cause the start suspension due to the heavy load of the helicopter.

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