论文部分内容阅读
变速器是轮式装载机底盘传动系统的重要组成部分,主要功用是改变输出转矩和转速的数值和方向,其工作性能的好坏直接影响整机的工作性能。随着工程车辆传动系统传递的功率不断增大,传动系发热量大幅度上升,其热损失不仅对系统的润滑和冷却有影响,而且对结构元件的工作强度也有很大影响。装载机工作时变速器产生大量的热,如果这些热量积聚在箱体内不能及时散发将导致变速器过热甚至内部零件的破坏,因此必须对变速器单位时间内的产热情况全面了解,以确保其热工况问题圆满解决。针对ZL80型轮式装载机的动力换挡变速器,分析了变速器内热源的发热机理,给出各热源产热量及传动系统总产热量的计算方法;给出齿轮啮合部位局部温升、支承轴承处局部温升的计算公式,并对其热量分布进行分析,为进一步改善变速器散热状况提供了依据。
Transmission is an important part of the wheel loader chassis transmission system, the main function is to change the value and direction of the output torque and speed, and its performance directly affects the overall performance of the machine. As the power transmitted by the transmission system of engineering vehicles continues to increase, the heat generation of the transmission system greatly increases. The heat loss not only affects the lubrication and cooling of the system, but also greatly affects the operating strength of the structural components. When the loader is working, the transmission generates a lot of heat. If the heat is accumulated in the box and can not be dissipated in time, it will lead to overheating of the transmission and even the destruction of internal parts. Therefore, the heat production situation per unit time of the transmission must be fully understood to ensure that its thermal condition The problem is solved satisfactorily. Aiming at the power shift transmission of ZL80 wheel loader, the heating mechanism of the heat source in the transmission is analyzed, and the calculation method of the heat output of each heat source and the total heat production of the transmission system is given. The temperature rise at the meshing part of the gear, The calculation formula of local temperature rise and the analysis of its heat distribution provide the basis for further improving the heat dissipation status of transmission.