基础振动下直动式减压阀动态特性分析

针对基础振动对TBM液压元件性能的影响，为TBM液压元件优化设计提供理论依据，选择直动式减压阀为研究对象，分析其工作原理，建立减压阀的动态响应数学模型，仿真研究基础振动幅值和频率对减压阀波动特性的影响规律，分析减压阀不同结构参数对压力波动的影响.结果表明：基础振动会引起减压阀出口压力波动，波动幅值随振动幅值增加而增大；当基础振动频率大于50 Hz时，压力波动幅值随频率的增加明显增大；减小背压腔初始容积和回流通道直径能提高减压阀的动态稳定性.

The dynamic characteristics analysis of direct operated pressure reducing valve on fundamental vibration

In order to focus on the impact of fundamental vibration on the performance of the TBM hydraulic components and provide theoretical basis for the optimal design of TBM hydraulic components, mathematical model was established based on the operating principle of direct operated pressure reducing valve. The influences of different fundamental vibration amplitudes and frequencies on valve fluctuation characteristics were researched， and the structural parameters influencing its pressure fluctuations were analyzed. The results indicate that fundamental vibration causes the valve outlet pressure fluctuations， the fluctuation amplitudes increase with the excitation amplitudes. Pressure amplitude increases with frequency significantly when the excitation frequency is greater than 50 Hz. Reducing the backpressure chamber volume and diameter of the return channel can improve the valve dynamic stability.