Vibration&Noise Reduction On Brush And Slip-ring System Of Propulsion Motor

For developing marine resources and protecting maritime rights better, higher dynamical requirements have been made for the dynamical systems of underwater vehicle. To ensure that underwater vehicle performs the task more quickly and effectively, the counter rotating direction has been used in propulsion motor which as a usual dynamical system of underwater vehicle. The phenomenon that radiation noise of propulsion motor becomes louder, in consequence of the counter rotating direction, has been a hidden danger for underwater vehicle which is running in the water. The brush and slip-ring system, as the slidable contact body of propulsion motor in current conduction, is an important component of propulsion motor in changing the electric energy to mechanical energy. In the operational process of propulsion motor, the poor slidable contact of brush and slip-ring will lead the radiation noise becoming louder, and even cause the trouble that propulsion motor cann’t work normally. Both of those are very bad for underwater vehicle running in the water. Therefore it has a very essential significance for vibration&noise reduction on brush and slip-ring system in vibration&noise reduction on propulsion motor.Through vibration&noise reduction on the brush and slip-ring system, the schemes that can control vibration&noise of brush and slip-ring system had been established in this paper, and some improved design on brush slip-ring system had also been made in this paper. Finally this paper provided the technical support for the client.Based on the noise and vibration characteristic test of brush and slip-ring system in working condition, the noise source&vibration source recognition and corresponding characteristics analysis of brush and slip-ring system have been finished in this paper. For modeling the complex brush and slip-ring system with finite element method, the method of dynamic synthesized modeling that combining finite element method and experimental analysis method has been used in this paper. The numerical errors of first four modes, made by finite element modal analysis and experimental modal analysis, have been less than10percentage. The finite element model of brush slip-ring system can simulate the dynamics features of prototype system precisely, and provides scientifically reasonable and realizable foundation for the further research that such as dynamics response, vibration and acustic radiation,dynamic optimize design on brush and slip-ring system, etc.