Research on Vibration Waveform of Electro-hydraulic Exciter with Rotary Valve Based on Different Valve Port Shapes

Abstract

Abstract: In order to provide the reference for design of valve port shape of electro-hydraulic exciter with rotary valve, rotary valves with triangle valve port, half round valve port and rectangular valve port are designed, and flow area model of three different valve port shapes is established. Based on analysis of the work principle of the electro-hydraulic exciter, mathematical model of the exciter is established, and vibration waveforms of the electro-hydraulic exciter are numerically simulated and experimentally validated. The results indicate that the flow area of rectangular valve port is linear and the flow area of triangle valve port and half round valve port is non-linear. Among the three different valve port shapes, the flow area peak of rectangular valve port is highest and the flow area peak of half round valve port is lowest. The vibration waveform with highest amplitude can be obtained by using rectangular valve port under the condition of the same oil pressure, but the acceleration fluctuation is largest at the same time. The vibration waveform with smallest acceleration fluctuation can be obtained by using half round valve port under the condition of the same amplitude, but the highest oil pressure must be supplied.

Key words: acceleration, amplitude, electro-hydraulic exciter, valve port shape, vibration waveform

WANG He, GONG Guofang, ZHOU Hongbin, LIAO Xiangping, WANG Wei. Research on Vibration Waveform of Electro-hydraulic Exciter with Rotary Valve Based on Different Valve Port Shapes[J]. Journal of Mechanical Engineering, 2015, 51(24): 146-152.

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