High-speed high-temperature efficient fuel pump for aerospace

Abstract

The invention discloses a high-speed, high-temperature and high-efficiency fuel pump for aerospace, and aims to solve the problems of large flow pulsation, large vibration impact, high noise and the like of the pump due to the fact that a straight-tooth gear pump is adopted as a traditional oil pump and gear teeth enter and are separated at the same time when the straight-tooth gear pump works because a contact line of a straight gear is parallel to an axis. Meanwhile, due to the oil trapping phenomenon of the gear pump, a shaft and a bearing need to bear huge pulsating loads, the service life of the bearing is greatly shortened, the contact stress of the gear is increased, abrasion of the gear is increased, and vibration, noise, liquid heating, power loss increase and the like are caused when the gear works. According to the invention, the problem of noise is effectively controlled by adopting a proper meshing angle, adjusting an unloading groove, additionally arranging an oil suction extension groove, a deviation floating bearing, a tooth-shaped modification pump cover and the like, the problem of oil trapping is solved, the overall working efficiency is improved, and the service life of the fuel pump is also prolonged.

Description

technical field [0001] The invention relates to the technical field of engine fuel pumps, in particular to a high-speed, high-temperature and high-efficiency fuel pump for aerospace. Background technique [0002] The traditional oil pump uses a spur gear pump, the disadvantage of which is that the contact line of the spur gear is parallel to the axis, and the gear teeth enter and separate at the same time during operation, which causes problems such as large flow pulsation, large vibration shock and high noise of the pump. It will be more obvious at high speed; at the same time, during the working process of the gear pump, part of the liquid between the two meshing gears is trapped and cannot be discharged to the outlet cavity, resulting in trapped oil, which makes the shaft and bearing bear a huge The pulsating load greatly reduces the life of the bearing, and also increases the contact stress of the gear, increases the wear of the gear, and causes vibration, noise, liquid ...

AI Technical Summary

Problems solved by technology

[0002] The traditional oil pump uses a spur gear pump. The disadvantage is that the contact line of the spur gear is parallel to the axis, and the gear teeth enter and separate at the same time during operation, which causes problems such as large flow pulsation, large vibration impact, and high noise of the pump. It will be more obvious at high speed; at the same time, during the working process of the gear pump, part of the liquid between the two meshing gears is trapped and cannot be discharged to the outlet cavity, resulting in trapped oil, which makes the shaft and bearing bear a huge load. The pulsating load will greatly reduce the life of the bearing, and it will also increase the contact stress of the gear, increase the wear of the gear, and cause the gear to vibrate during operation, generate noise, heat the liquid, and increase power loss.

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