曳引机调心滚子轴承唇形密封圈密封及摩擦性能分析

Sealing and Friction Performance Analysis on Lip Seal Ring of Self-aligning Roller Bearing of Traction Machine

针对曳引机主支承调心滚子轴承密封过早失效及密封圈摩擦损耗大问题,构建调心滚子轴承唇形密封圈的有限元模型,研究唇形密封圈主要结构参数及橡胶材料硬度对其密封性能(最大接触应力表征)及摩擦性能(摩擦力矩表征)的影响规律,并基于响应曲面法探明唇形密封圈主要结构参数间存在的交互作用。结果表明:最大接触应力随唇形密封圈过盈量、腰部厚度及橡胶材料硬度的增加呈近似线性增加,随唇倾角及唇口圆角半径的增加分别呈近似线性减小及非线性减小;摩擦力矩随过盈量、腰部厚度及橡胶材料硬度的增加而增加,随唇口圆角半径的增加先快速增加后缓慢增加,随唇倾角的增加呈非线性减小;过盈量和唇口圆角半径的交互作用及腰部厚度和唇口圆角半径的交互作用对最大接触应力的影响较为显著;腰部厚度和过盈量的交互作用对摩擦力矩的影响较为显著。研究结果可为调心滚子轴承唇形密封圈设计及选型提供一定指导。

Aiming at the premature failure and the large friction loss of the seal ring of the self-aligning roller bearing seal on the main support of the traction machine,the finite element model of the lip seal ring for the self-aligning roller bearing was constructed,the influence of the main structural parameters of the lip seal ring and rubber hardness on sealing performance(maximum contact stress characterization)and friction performance(friction torque characterization)were studied,and the interaction among the main structural parameters of the lip seal ring was analyzed based on the response surface method.The results are as follows,the maximum contact stress increases approximately linearly as the interference,waist thickness of the lip seal ring and rubber hardness increase,and decreases approximately linearly and nonlinearly with the increase of lip inclination angle and fillet radius respectively.Friction torque increases with the increase of interference,waist thickness and rubber hardness,also increases rapidly and then increases slowly with the increase of fillet radius,while it decreases nonlinearly with the increase of lip inclination.The interaction between interference and fillet radius and the interaction between waist thickness and fillet radius significantly impact on the maximum contact stress.The interaction between waist thickness and interference has a significant influence on friction torque.The results can provide guidance for the design and selection of lip seal ring for self-aligning roller bearing.