关键词: 重型汽车；离合器；通风散热；热平衡分析；散热优化

Abstract: During the start of the heavy-duty vehicle, the flywheel and driven plate of the clutch change from a separated state to a fully engaged state. In the separated state, the flywheel of the clutch is driven to rotate by the engine, and the driven plate has no power source. And in the engaged state, as the speed of the driven plate continues to increase, the relative sliding occurs between the driving and the driven part, which will cause the temperature of the pressure plate and the flywheels to rise. If the temperature of the friction surface is too high, it will aggravate the friction lining wear, and will seriously affect the normal operation and service life of the clutch. In this paper, the thermal balance of three clutches with different structures was analyzed, and a better solution to improve the heat dissipation of the clutch was obtained according to the temperature distribution of the thermal balance for the clutch with different structures.

Key words: Heavy-duty vehicle; Clutch; Heat dissipation; Thermal balance analysis; Heat dissipaion optimization