起重机回转支承轮齿冲击动态特征分析

为明确回转支承轮齿间碰撞失效的动力学原因，以回转支承的外齿圈齿轮为研究对象，建立回转支承轮齿在制动停车下的冲击动力学理论计算模型，并运用显式动力学有限元数值分析方法，分析回转支承轮齿在不同回转速度下停车的动态响应特性，探讨回转速度对回转支承外圈轮齿的影响规律。结果表明冲击载荷是引起点蚀和断齿的主要原因；冲击响应随回转速度的增加而增加。

Shock Response Properties of Crane Slewing Bearing Under the Condition of Revolve Braking

In order to figure out the origin of the gear failure of crane slewing bearing, this paper chose the outer race gear as research object, established an impact dynamics theory calculation model of the gear under the condition of revolve braking, analyzed the shock response properties of the gear in different rotary speed and discussed its general rule by using the explicit dynamics FEA analysis method. The result shows that the impulsive force is the main reason of gear surface pitting and brokenness; the shock response properties are more seriously while the rotary speed is increasing.