改进的湿式离合器带排转矩模型

Improved drag torque model for wet clutch

基于表面张力和表面波度以及摩擦副不平行度的影响,建立了改进的湿式离合器带排转矩模型。推导了考虑表面张力和表面湿润的摩擦副径向压力分布方程,同时推导了摩擦副不平行度和表面波度影响下的油膜厚度。通过计算研究发现:表面张力、摩擦副不平行度和表面波度均使离合器带排转矩增大,而且不平行程度越大,带排转矩增加越快,而表面波度对带排转矩的影响较小。将改进的模型与原模型和试验数据进行了对比,验证了改进模型的有效性。

An improved drag model for wet clutch is proposed based on the surface tension of lubricant, surface waviness and nonparallelism of friction pairs. The radial pressure distribution equation is derived by considering the surface tension and surface wettability. The thickness of oil film is deduced under the influences of surface waviness and nonparallelism of the friction pairs. Results of numerical calculation indicate that the surface tension, surface waviness and nonparallelism of friction pairs all lead to increase in the drag torque of wet clutch. The drag torque increases rapidly with rise of the nonparallelism, while the influence of the surface waviness is not obvious. The effectiveness of proposed model is verified by comparison of this model with existing model and with test data.