重型汽车变速器润滑系统流动与传热仿真分析
Simulating Flow and Heat Transfer in Lubrication System of a Heavy-duty Automobile Transmission

应用AMESim软件并结合AMESet二次开发平台，建立了某重型汽车变速器润滑系统流动与传热耦合仿真模型，并在变速器专用试验台上进行了模型的实验验证。应用所建模型完成了不同工况条件下润滑系统的流动与传热仿真，对典型润滑节点的润滑状况进行了分析评价及改进。结果表明：变速器在低速大负荷及高速小负荷工况下工作时，除中间轴左轴承润滑不足外，其余轴承均润滑良好；采取加大轴承润滑油道直径使节点流量率增大来改善中间轴左轴承润滑状况的措施是可行的。
The model for simulating the flow and heat transfer in the lubrication system of a heavy-duty automobile transmission was established with AMESim and AMESet and validated on the test bed designed for the automobile transmission. The flow and heat transfer in the lubrication system under different operation conditions were simulated, and the lubrication conditions at several typical nodes were analyzed and improved. The simulation results and their analysis show that all the validated bearings have good lubrication except the left bearing of the middle axle of the heavy-duty automobile transmission under the operation conditions of high speed and light load or low speed and heavy load. It is feasible to increase the oil channel diameter so that the node flow rate increases in order to improve the lubrication of the left bearing of the middle axle