Torsional Vibration-Suppression Device of High-power Aviation DC Generator

Abstract

The invention relates to a torsional vibration and damping device for high-power direct current aero-generators. The torsional vibration and damping device is characterized in that a transmission shaft of a generator is sleeved with a rigid damping disc, a friction plate, an elastic damping disc and a powder metallurgy bushing, an inner hole of the power metallurgy bushing is in a No.5 Brown-Sharpe cone structure press-fitted on the transmission shaft of the generator, an inner hole of the elastic damping disc is fitted to the power metallurgy bushing through involute spline sides, a hollow shaft is sleeved with the rigid damping disc, and the friction plate is disposed between the rigid damping disc and the elastic damping disc. The torsional vibration and damping device has the advantages that the hollow shaft and the transmission shaft are designed into a composite structure; additionally, the torsional vibration and damping device is disposed between the hollow shaft and the transmission shaft in order to suppress transmission amplitude of the transmission shaft, and accordingly influences of abnormal impact and vibration upon the generator are reduced and normal operation of the generator is guaranteed.

Description

technical field [0001] The invention belongs to an aviation power supply system, in particular to a torsional vibration-damping device for a high-power aviation DC generator. Background technique [0002] For the low-voltage DC power supply system, it is generally composed of a DC generator, a generator control box and a main contactor, and provides a certain capacity of DC power to the on-board power grid. In the aircraft, the DC generator is installed on the accessory casing of the engine and driven by the engine. The DC generator is designed as a composite structure of a drive shaft and a hollow shaft, the middle is connected by an involute spline or a cone-key structure, and the drive shaft and the inner set of teeth of the engine are connected by an involute spline to transmit torque. The characteristic of this structure is that the drive shaft can buffer certain engine shocks and vibrations on the generator. For high-power generators, especially generators used on tr...

AI Technical Summary

Problems solved by technology

For high-power generators, especially generators used on trainers, in actual use, trainer training is more frequent and frequently occurs various flight training actions such as climbing, maneuvering sharp turns, diving, landing and then taking off, which makes the impact of the engine , vibration and torque changes greatly, resulting in very unstable operation of the generator and affecting the normal operation of the generator, so necessary measures should be taken to eliminate or reduce its influence to ensure flight safety and the completion of training tasks

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