抱轴力与唇口形变耦合作用下唇形密封生热和泵汲效应  

Study of Heat Generating and Pumping Effect of Lip Seals under Coupling Action of Wringing Force and Lip Deformation

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

机构地区：[1]重庆大学动力工程学院,重庆400044 [2]重庆杜克高压密封件有限公司,重庆400039

出　　处：《内燃机工程》2013年第6期64-69,共6页Chinese Internal Combustion Engine Engineering

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资助项目(CDJZR11140002)

摘　　要：针对径向唇形密封，考虑抱轴力与唇口形变量的应变关系，建立了生热与泵汲的二维模型，计算了不同参数下生热量和泵汲率。研究结果表明：随着转速提高，唇口最大形变量和接触宽度不发生变化，但单位面积生热率增加；同时，在流体动力作用下，油膜厚度增加，泵汲率增大；当抱轴力增加时，单位面积生热率增加，油膜厚度并未发生变化，泵汲率不变；随着材料的杨氏模量（硬度）增加，单位面积生热率增加，泵汲率减小；当空气侧唇角一定，两侧唇角之差约为20°～30°时，单位面积生热率较小，泵汲率最大，密封性能较好。进行密封参数设计时，需要综合考虑生热和泵汲效应对密封性能的影响。The results show that while shaft speed rises, the lip deformation and contact width do not change but heat generation rate per unit area increases, and owing to hydrodynamic oil film thickness added the pumping rate rises~ while wringing force increasing the heat generation rate will grow, the oil film thickness does not change and the pumping rate unchanged. With Young＇s modulus of the material increases, the heat generation rate will go rise, but pumping rate decreases~ For a certain air side lip angle, the lip angle difference of two sides is 20°～30°,a better sealing performance scheme of the min. heat generation rate with the max. pumping rate may be achieved. It is indicated that the influence of heat generation and pumping effect should be taken into account comprehensively in designing the shaft sealing.

关 键 词：内燃机 应变关系 唇口形变 密封性能 生热与泵汲效应 

分 类 号：TK412[动力工程及工程热物理—动力机械及工程]