农业机械学报2026，Vol.57Issue(14)：397-406,10.DOI:10.6041/j.issn.1000-1298.2026.14.039
基于油膜动态特性的拖拉机湿式离合器摩擦副接合热行为研究
Thermal Behavior During Engagement of Tractor Wet Clutch Friction Pairs Based on Oil Film Dynamic Characteristics
摘要
Abstract
As the core power control component of the tractor transmission system,the transient viscous flow of the oil film between friction pairs and the thermo-fluid-solid coupling effect of the wet clutch during engagement directly determine transmission reliability and thermal stability.Aiming at the unclear mechanism of how the wet clutch oil film's dynamic characteristics affect friction pair temperature evolution,the fluid control and heat generation rules during engagement were analyzed,the dynamic mesh and thermal boundary constraints were studied,and a thermo-fluid-solid coupling model was established.Fluent simulated the friction pair engagement to obtain oil velocity,pressure,temperature and volume fraction distributions,revealing the transient heat generation and transfer mechanism.Wet clutch bench temperature tests were conducted with R2,RMSE and MAPE as indicators to verify the model's effectiveness in characterizing engagement thermal behavior.Results showed that oil velocity increased radially under centrifugal and shear forces;the middle-inner diameter zone had little oil,high pressure and poor lubrication,concentrating high temperature there with the peak at 75%radial depth of the steel disc and a radial temperature gradient.Tests verified the thermo-fluid-solid coupling model(R2=0.971,RMSE was2.11℃,MAPE was2.23%)had higher prediction accuracy than the thermo-solid coupling model(R2=0.931,RMSE was 3.47℃,MAPE was 3.00%).The research result revealed the oil film dynamics'regulation mechanism on heat generation and transfer,providing theoretical and technical support for tractor wet clutch structural optimization and transmission performance improvement.关键词
湿式离合器/热流固耦合/动网格/CFD仿真/油膜动态特性/温度预测Key words
wet clutch/thermal-fluid-solid coupling/dynamic mesh/CFD simulation/oil film dynamic characteristic/temperature prediction分类
农业科技引用本文复制引用
闫祥海,曹涵博,贾方,郭晓博,王双坚,张方明,吴依伟..基于油膜动态特性的拖拉机湿式离合器摩擦副接合热行为研究[J].农业机械学报,2026,57(14):397-406,10.基金项目
宁波市2025年农机研发制造推广应用一体化试点项目(甬农发(2025)145号)和宁波市科技局科技创新2025重大专项(2022Z184) （甬农发(2025）
