表面技术2025，Vol.54Issue(17)：46-57,66,13.DOI:10.16490/j.cnki.issn.1001-3660.2025.17.004
不同配副材料非静态接触热导对多锥形摩擦副温升特性的影响
Influence of Non-static Thermal Contact Conductance of Different Mating Materials on Temperature Rise Characteristics of Multi-conical Friction Pairs
摘要
Abstract
The temperature of friction pairs has a significant impact on the working performance and service life of wet clutches.Studying the temperature distribution and temperature rise characteristics of multi-conical friction pairs during the engagement process under different material combinations helps in the design and application of new clutches.The multi-conical friction pair composes of two clutch plates and one friction plate.By controlling the engagement state between friction pairs through piston rings,torque can be transmitted from the engine to the transmission.Based on the tribology and heat transfer theory,the influence of non-static thermal contact conductance between the contact surfaces of the friction pair is considered,and the thermal boundary conditions of the multi-conical friction pair are analyzed.The thermal boundary conditions considered include convective heat transfer between the steel plate and the friction plate with the surrounding oil,frictional heat generation during sliding,and contact heat conduction between the steel plate and the friction plate.Assuming material properties do not change with temperature or direction and neglecting radiative heat transfer,the heat flux is uniformly distributed in the circumferential direction,allowing the three-dimensional heat transfer problem to be simplified to a two-dimensional problem for solving.By deriving the transient heat transfer equations for each node,the transient temperature field of the multi-conical friction pair is numerically simulated using the finite difference method.Finally,a numerical calculation model for the transient temperature field of the multi-conical friction pair is established.The accuracy of the numerical model is verified through bench tests,showing that the average temperature rise of the numerical simulation results has an error of less than 5％compared with the experimental data.The results indicate that,under identical radial dimensions and output torque,the axial size of multi-conical friction pairs is reduced by 14.29％compared with disc friction pairs,while the average surface temperature increase is approximately 40％higher.A significant positive interaction exists between relative velocity and contact pressure on the surface temperature of multi-conical friction pairs.The thermal conductivity of the material influences the internal temperature field of multi-conical friction plates.With the increase in the thermal conductivity of multi-conical friction plates,the temperature difference between the friction plate and the steel plate increases.The temperature difference between the apex and the base of the friction cones decreases,leading to a decline in the temperature gradient within the friction plate.In conclusion,the multi-conical friction pair exhibits superior torque transmission capability and can effectively reduce the axial size of the clutch.However,the conical structure leads to a higher surface temperature rise.Therefore,the multi-conical friction pair is suitable for special vehicles and engineering machinery where overall installation dimensions are limited but high power density is required.Enhancing the heat dissipation capacity of the friction pair and selecting materials with higher thermal conductivity can help reduce the temperature gradient within the friction plate,mitigate thermal stress,and prevent clutch thermal failure.Future research could focus on designing the conical groove structure to further improve heat dissipation.关键词
湿式离合器/非静态接触热导/瞬态温度场/有限差分/多锥形摩擦副/温升特性/离合器热失效Key words
wet clutch/non-static thermal contact conductance/transient temperature field/finite difference/multi-conical friction pair/temperature rise characteristics/clutch thermal failure分类
交通工程引用本文复制引用
刘雨薇,孙园植,陈昌辉,原彦鹏,衣超,石嘉炜..不同配副材料非静态接触热导对多锥形摩擦副温升特性的影响[J].表面技术,2025,54(17):46-57,66,13.基金项目
国家自然科学基金(52105232) （52105232）
多栖平台驱动系统全国重点实验室开放基金(QDXT-WY-202407-15) （QDXT-WY-202407-15）
中央高校基本科研业务费专项(2024ZKPYJD09)National Natural Science Foundation of China(52105232) （2024ZKPYJD09）
Open Foundation of National Key Laboratory of Multi-perch Vehicle Driving Systems(QDXT-WY-202407-15) （QDXT-WY-202407-15）
Fundamental Research Funds for the Central Universities(2024ZKPYJD09) （2024ZKPYJD09）
