基于O形密封圈磨损过程的不同工况下溢流阀寿命预测方法

为了对不同工况下的某溢流阀进行寿命预测,通过寿命试验与ANSYS仿真相结合的手段,基于溢流阀内O形圈磨损过程,首先进行溢流阀的寿命试验,通过溢流阀寿命试验得出溢流阀在标准环境下的寿命信息,然后进行O形圈磨损过程的ANSYS仿真,建立仿真模型,模拟O形圈在标准环境下溢流阀中的受力状态和材料属性,得到O形圈所受接触压力小于工作压力时的O形圈失效当量半径,该当量半径与试验所得寿命信息可视为同一点,通过Archard磨损模型计算得到该元件的磨损率,并根据O形圈不同温度下的材料常数在ANSYS仿真模型中测得该工况下的失效半径,计算出这一工况下的寿命信息,通过不同工作压力和工作温度下的多次仿真,利用所得寿命信息,建立了溢流阀在不同工况下的寿命响应面,该方法可以应用到不同工况下的溢流阀寿命预测领域,为不同工况下液压元件寿命预测提供了参考.

Life prediction method of relief valve under different working conditions based on wear process of O-ring seal

Based on the wear process of O-ring in relief valve, the life prediction of an overflow valve under different working conditions was carried out by means of life test and ANSYS simulation. Firstly, the life test of the relief valve was carried out, and the life information of the relief valve in the standard environment was obtained through the life test. Then the ANSYS simulation of the O-ring wear process was conducted, and the simulation model was established to simulate the stress state and material properties of the O-ring in the standard environment. The equivalent radius of O-ring failure was obtained when the contact pressure of O-ring is less than the working pressure. The equi-valent radius can be regarded as the same point as the life information obtained from the test. The wear rate of the element was calculated by the Archard wear model. According to the material constant of O-ring under different temperatures, the failure radius under this working condition was measured in ANSYS simulation model, and the life information under this working condition was calculated. The life response surface of relief valve under different working conditions was established by using the life information is obtained from multiple simulation under different working pressure and temperature. This method can be applied to the field of life prediction of relief valve under different working conditions, which provides a reference for the life prediction of hydraulic components under different working conditions.