减振装置过油孔对阻尼阀水击的影响研究

针对车辆在各种路况行驶时阻尼阀频繁受到交变冲击力作用容易失效的特点,提出了研究阻尼阀水击压强的重要性。建立了环形节流阀片的单向阀物理模型,并分析水击波在阀门附近的传递规律。运用特征线法求解水击传递的偏微分方程组,考虑油路中的局部和沿程压力损失,将水击理论合理转化并应用到小型液压件中,创建了串联过油孔的阻尼阀水击数学模型。通过编程分析得出,随着过油孔结构参数的增大,阀门所受最大水击压强幅值及水击波振荡周期能够得到有效抑制,从而提高阀片抗冲击的可靠性,为阻尼阀设计提供了参考。

Influence of Shock Absorber Passing Oil Orifice upon Throttle Valve Water Hammer

In view of the fact that the throttle valve of a vehicle shock absorber is easy to fail due to the alternating impact induced from different road conditions, a study of the water hammer pressure to the throttle valve is presented in the paper.A physical model of the check valve with annular slice was built up and the transfer regularity of the water hammer wave near the slice of the valve was analyzed. The partial differential equations of water hammer were solved by the latent line method . Taking the pressure losses in the passing oil orifice into consideration,a water hammer mathematic model of the throttle valve was established. Simulated results show that the water hammer pressure and its periodic numbers can be effectively controlled by enlarging the structure parameters of passing oil orifice to improve the slice reliability. The work in this paper can offer reference in the design of a throttle valve.