摘要
以某车辆变速器传动系统为研究对象,基于传热学原理建立了该传动系统的热分析数学模型,依照分析复杂度给出了简化的假设条件,根据实际工况计算热分析的边界条件,采用有限元法研究了该传动系统温度场的分布规律,并与实验测试数据对比验证预测结果。结果表明:各零部件间的温度差异受到各自几何参数、传递载荷、转速以及油气混合物物性与冷却方式的共同影响;与滚动轴承摩擦生热相比,齿轮啮合是变速器传动系统中的主要热源;预测结果符合实际,为车辆变速器传动系统热平衡状态下的温度预测提供了必要的理论基础。
Taking a transmission system in automobile gearbox as research object, the mathematical model and solutioa assumptions of the thermal ancdysis were established based on the heat transfer theory and complexity of analysis. The boundary conditions of the thermal analysis were calculated according to the actual working conditions, and the boundary conditions were loaded and the temperature distribution was simulated based on the finite element method. By comparing with the temperature test of bearings, the analysis results were verified. The results show that the temperature difference of each part or component is jointly determined by the load, rotating speed, physical property of gas-oil mixture, cooling-down method and geometrical parameters. By comparing the friction heat of rolling bearing and gear meshing, it is found that gear meshing is the main heat source of gear transmission system. The analysis results are more practical and lay a necessary theoretical foundation for the thermal analysis of the transmission system in automobile gearbox.
出处
《机械设计与制造》
北大核心
2015年第6期194-197,共4页
Machinery Design & Manufacture
基金
国家自然科学基金项目(51275081)
辽宁省教育厅科学研究项目(L2014246)
辽宁工业大学校基金项目(X201202)
关键词
车辆变速器
传动系统
温度场
有限元法
Automobile Gearbox
Transmission System
Temperature Field
Finite Element Method
