Research of Noise Reduction about Excavator Return Line

굴삭기 리턴 라인 유동소음 감소에 관한 연구

In this paper the noise source and the amplifying mechanism are analyzed to reduce the noise of the excavator return line using the experimental approach and the CFD simulation. The result says that the reason of noise generation is pipe vibration caused by the cavitation at the main control valve and the level of noise is proportional to the valve back pressure at the return line. The methodology to reduce this noise was proposed and verified by the vehicle test.