结构参数对径向唇形密封圈密封性能的影响研究  

Study of the influence of structure parameters on sealing performance of radial lip seal

作　　者：吴庄俊[1] 赵良举[1] 杜长春 洪玉意 李云飞 赵向雷[1] 

机构地区：[1]重庆大学动力工程学院,重庆400030 [2]重庆杜克高压密封件有限公司,重庆400039

出　　处：《合肥工业大学学报（自然科学版）》2012年第11期1451-1455,1581,共6页Journal of Hefei University of Technology：Natural Science

基　　金：重庆市自然科学基金资助项目(CSTC2007BB6184);中央高校基本科研业务费专项资金资助项目(CDJZR11140002)

摘　　要：文章针对径向唇形密封圈,考虑抱轴力与唇口接触宽度的关系,建立简化的二维模型,推导得到了新的包含转速与抱轴力的生热量和泵汲率表达式,并分析了结构参数对密封性能的影响。结果表明:计算数据与现有实验和模拟结果取得了较好的一致性,结构参数中的两侧唇角、唇口厚度和轴径的改变会影响唇口的形变量,从而改变接触宽度,最终影响到密封性能;空气侧唇角的变化对抱轴力的影响更大,而油侧唇角的变化对泵汲率的影响更显著;随着唇口厚度的增加,接触宽度也增加,这会导致唇口压力均匀分布,不利于促进泵汲率;随着轴径的增加,抱轴力也变大,生热量和泵汲率都逐渐增加。Aiming at the radial lip seal, new expressions of heat generation and pumping rate with rota- tional rate and wringing force are deduced from the simplified 2-D model considering the relationship of wringing force and contact width, and the influence of structure parameters on the sealing perform- ance is studied. The results show that there is good consistency between the calculated data and the existing experimental data. The lip deformation and contact width will be determined by the structure parameters, such as the lip angles of both sides, the thickness of lip and the shaft diameter, which will affect the sealing performance. The effect of the angle of air side on wringing force is more impor- tant, while the effect of the angle of oil side on pumping rate is more obvious. It is not conducive to promote pumping rate with the lip thickness increasing, as it will lead to an even pressure distribu- tion. With the increase of shaft diameter, the wringing force, heat generation and pumping rate will rise.

关 键 词：径向唇型密封 生热量 泵汲率 结构参数 密封性能 

分 类 号：TB42[一般工业技术]