插装式2D伺服阀流场仿真及实验研究

Simulation and Experimental Study on Cartridge 2D Servo Valve

阐述了插装式二维(2D)伺服阀的结构及工作原理,设计了圆形和扇形两种回油流道结构,通过Fluent软件对不同进出口压差下两种流道结构的流量、压力分布、速度分布进行数值模拟计算,进而算出两种流道结构的流阻系数,通过实验研究验证了仿真结果的正确性。研究表明,在进出口压差相同的条件下,扇形流道的流阻相比圆形流道的流阻较小,能量损失较小,通流能力较大,流阻系数是流道的本身性质与外界条件无关。这为插装式伺服阀的优化设计提供了一定的参考。

The structure and working principal of cartridge two-dimensional(2D)servo valve are demonstrated.The circular flow channel and the fan-shaped flow channel are designed.The flow,pressure distribution and velocity distribution of the two flow channel under different pressure difference between inlet and outlet are simulated by Fluent,and then the flow resistance coefficients of the two flow channel are calculated,and the simulation results are verified through experimental studies.The results show that,under the condition of identical pressure difference between inlet and outlet,the flow resistance of the fan-shaped flow channel is smaller than the circular flow channel,the energy loss is smaller and the flow capacity is larger,and the flow resistance coefficient is the nature of the flow channel and has nothing to do with the external conditions.This provides a certain reference for the optimization design of cartridge servo valve.