中文摘要：

传动滚筒作为圆管带式输送机的关键零部件,常采用经验公式取较大安全系数设计筒体结构,实际运行过程中受到弯扭耦合及不平衡所导致动态载荷联合作用,容易导致筒体表面及支撑轴承过早失效。针对现有圆管带式输送机中常见圆柱型、腰鼓型、内凹型3种筒体结构形状的传动滚筒,采用微元法开展滚筒结构受力分析,分别建立相应的有限元模型,研究其应力应变分布及变形规律,得出当筒体表面最大内凹量为直径的7%时,内凹型比圆柱型滚筒最大应力要低63%,最大变形量要减少76%。然后以内凹型传动滚筒结构形式为例,研究其临界转速与模态振型等动力学特性,分析不平衡激励位于筒体中间表面时的稳态同步响应,发现滚筒振动和支撑轴承动载荷随转频成指数增长关系。力学特性分析结论可为此类传动滚筒结构形式设计及不平衡量控制提供参考。

英文摘要：

Driving drum as the main driving equipment components of pipe belt conveyor, the traditional empirical formula and bigger safety coefficient method is used to design the structure. In the process of actual operation, the driving drum is influenced by the bending moment and torque coupling effect and dynamic load caused by imbalance. Therefore, the driving drum surface and support bearing are easily damaged. Taking existing same thickness cylindrical, drum type, concave type, three different models drive drum structure as examples, the stress analysis of driving drum is studied, the finite element model is established, the stress dis- tribution and deformation law of the three type structures is obtained and the result is that when the maximum amount of concave is 7% of the diameter, the maximum stress decreased 63% and the maximum deformation decreased 76% comparing with common cylinder. Taking the concave type as an example to analyze dynamic characteristic, critical speed and modal vibration mode are studied. When the unbalance appear in the middle, vibration response and bearing load increases exponentially along with the speed change. The results provide guidance for transmission drum structure design and balance control.