振动环境下插装阀的动态特性

为研究强振动环境对二通插装阀工作性能的影响,建立了振动环境下的二通插装阀结构模型及AMESim仿真模型,分别分析振动条件及插装阀结构参数对其动态特性的影响规律。研究表明:基础振动会引起插装阀阀口流量及阀芯开度出现波动现象;阀芯在稳态时的波动程度随基础振动幅值线性增加,振动频率大于20Hz后,波动程度明显。较小的阻尼孔径会使流量上升至最大值的时间增加,但通过阀口的流量更平稳;插装阀在开启状态时,阀芯波动值与阀芯质量呈正相关关系;改变插装阀的面积对改善流量波动现象效果有限;增加弹簧刚度可以改善流量波动现象,但会使通过阀口的流量减小。

Study on Dynamic Characteristics of Cartridge Valve in a Vibration Environment

In order to investigate the influence of a strong vibration environment on the working performance of two way cartridge valves, the structure model and simulation model of the cartridge valve in a vibration environment are established using AMESim software. Influence laws of the vibration condition and the structural parameters of the cartridge valve to its dynamic characteristics are also analyzed separately. The results show that foundation vibrations can cause the cartridge valve flow and open height to fluctuate. The degree of fluctuation of the open height in the steady state increases linearly with the amplitude of the foundation vibration, and is significant when the vibration frequency is over 20Hz. Furthermore, a smaller damping hole diameter can increase the time of the flow raise to the maximum, but the hydraulic oil flow through the valve will be smoother; the fluctuation degree of the open height increases correspondingly with spool quality when the cartridge valve is in the opening state; changing the cartridge valve area can reduce the flow fluctuation; and finally, increasing spring stiffness can also reduce the flow fluctuation, but reduce the flow through the valve.