基于格来圈结构的O形密封圈动密封分析

Analysis of O-ring Dynamic Sealing Based on Glyd Ring

针对导向叶片作动筒漏油故障,采用ANSYS WORKBENCH软件分析格来圈动密封性能。依据密封理论通过分析接触压力,发现了结构、材料及间隙等关键因素,模拟了活塞杆-保护圈、保护圈-密封圈、密封圈-密封槽之间的密封效果。计算结果表明:在同等条件下,氟橡胶相对氟硅橡胶密封效果更优。采用Archard磨损理论进行校验计算,间接证明了仿真结果与实际情况较吻合,仿真结果与实际工作时间误差为14.8%,具备较高的可信度。最后提出提高动密封性能应从提高接触面的光洁度入手,从而达到降低磨损的目的。

In view of the oil leakage fault of the guide vane actuator, the dynamic sealing performance of glyd ring was analyzed using ANSYS WORKBENCH software. According to sealing theory,the key factors such as structure,material and clearance were found by analyzing contact pressure. The sealing effect between piston rod and protection ring, protection ring and sealing ring and sealing ring and sealing groove were simulated. The calculation results show that the sealing effect of fluoro rubber is better than that of fluorosilicone rubber under the same conditions. To check the calculation using Archard wear theory, it is indirectly proved that the simulation results are consistent with the actual situation,and the error between the simulation results and the actual working time is 14.8%,which has high credibility. Finally,it is suggested that the improvement of dynamic sealing performance should start with the improvement of the contact surface finish,so as to reduce the wear.