联合收获机发动机风冷系统优化设计OA

In order to reduce the boiling phenomenon of water tank in the harvesting process of combine harvester and prolong the trouble free working time of harvester.In this paper,the heat dissipation of the engine air cooling system of the 4LXZ-8F combine harvester was calculated.Based on the calculation results,the dust cover and radiator were optimally designed,and the cooling fan was matched and selected.The 3D modeling of the air cooling system before and after opti-mization was carried out using Solidworks the Fluent software was used to simulate and analyze the heat dissipation per-formance of the radiator before and after the optimization of the engine air cooling system.The simulation results show that the cooling water inlet temperature before optimization is 90℃,the outlet temperature is 72.3℃,and the temperature difference between the inlet and outlet is 17.7℃.The optimized cooling water inlet temperature is 90℃,the outlet tem-perature is 71.1℃,and the inlet and outlet temperature difference is 18.9℃ which proved that the heat dissipation per-formance of the optimized radiator is improved by 6.78％.The research results of this paper provide theoretical guidance for improving the heat dissipation performance of the engine air-cooling system and prolonging the trouble-free harvest time.