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针对某钢厂210 t转炉倾动机构在启动过程中存在抱闸开启不同步现象,为研究此工况下接触冲击对齿轮强度的影响,在Pro/E中建立减速器末级齿轮的几何实体模型,将其导入Hyper Mesh有限元前处理软件建立有限元求解模型,利用显式动力学求解器LS-DYNA进行求解。结果表明,在齿轮零间隙接触的情况下,抱闸不同步打开使滞后启动小齿轮所受冲击应力远小于其他3个小齿轮。同时,验证了齿轮接触冲击应力随着齿轮间速度差的增加而增大,齿轮最大冲击应力发生在齿宽中部齿根位置处。
In order to study the influence of the contact impact on the gear strength in the 210 t converter tilting mechanism of a steel mill during start-up, a geometric solid model of the final gear of the reducer is established in the Pro / E , And introduced into Hyper Mesh finite element preprocessing software to establish the finite element solution model and solved it by the explicit dynamics solver LS-DYNA. The results show that when the gear is in zero-clearance contact, the brake does not open synchronously and the impact stress of the hysteresis starter pinion is far less than that of the other three pinions. At the same time, it is verified that the impact stress of gear contact increases with the increase of the speed difference between gears, and the maximum impact stress of gear occurs at the middle gear tooth root.