针对拖拉机用湿式离合器的换挡过程,在分析传统拖拉机档位使用时间以及换挡时间的基础上,通过AMESim软件建立一维仿真模型,考虑与离合器毂的传热,仿真分析了湿式离合器连续换挡时热传递情况以及不同换挡频率下温升特性。结果表明：连续换挡7次后,温升幅度小于1 ℃。随着换挡频率加快,连续换挡后最高温度上升幅度逐渐增大。摩擦片瞬时传热量从大到小依次为油液、钢片、离合器内毂。钢片瞬时传热量从大到小依次为摩擦片、油液、离合器外毂。与离合器毂的瞬时传热量小于40 W,低于油液瞬时传热量的5%。
Aiming at the shift process of the wet clutch used in tractors, and based on the analysis of the service time and shift time of the traditional tractor gear, it simulated and analyzed the heat transfer of the wet clutch during continuous shift gear and the temperature rise characteristics under different shift frequencies, which a one-dimensional simulation model was established by AMESim software and the heat transfer with the clutch hub was considered. The results show that the temperature increase is less than 1 ℃ after 7 consecutive shifts. While with the acceleration of gear shifting frequencies, the rising amplitude of the maximum temperature increases gradually after continuous gear shifting. Instantaneous heat transfer quantity of friction plate is in the order of oil, steel plate and clutch inner hub from more to less. Instantaneous heat transfer quantity of steel plate is friction plate, oil and clutch outer hub from more to less. The instantaneous heat transfer quantity with the clutch hub is less than 40 W, which is lower than 5% of the instantaneous heat transfer quantity of the oil.
丁华,赵敬彦,陈潘明,等. 拖拉机湿式离合器连续换挡温升特性仿真分析[J]. 科学技术与工程, 2023, 23(30): 12858-12865.
Ding Hua, Zhao Jingyan, Chen Panming, et al. Simulation analysis of temperature rise characteristics of tractor wet clutch’s shift gears in succession[J]. Science Technology and Engineering,2023,23(30):12858-12865.