Damage analysis and lifetime prediction of round-link chain of mine-used scraper conveyor
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摘要: 利用三维软件CATIA建立了刮板输送机圆环链的三维模型，采用有限元分析软件ANSYS对圆环链的接触碰撞过程进行仿真分析，结果表明，圆环链处于瞬间启动状态时，应力主要集中于链环间的接触部位和链环直臂与弯臂的连接处，这两处是圆环链最薄弱的区域，极易发生断裂，在设计时应加强这两处的刚度；传动过程中，圆环链间接触区域不断摩擦，圆环链受反复交变载荷的作用会发生破裂。利用线性疲劳损伤累积理论对圆环链的寿命进行预测，得出圆环链最小寿命为49 073次循环，最小寿命部位为圆环链弯臂与直臂的连接处。该分析结果可为圆环链的优化设计提供依据。Abstract: A three-dimensional model of round-link chain of scraper conveyor was established by 3D software CATIA, contact-impact process of round-link chain was simulated and analyzed by finite element analysis software ANSYS. The analysis results show that stress is concentrated on the contact area between the round-link chains and joint between straight arm and curved arm when the round-link chain is in instant startup state. The joint between the straight arm and curved arm is the weakest area of the round-link chains, and it is easy to break, so stiffness was should be strengthened in design.The contact area between the round-link chains is rubbed continuously during transmission process, and the round-link chains are broken by repeated alternating load. Lifetime of the round-link chain was predicted by theory of fatigue damage accumulation, and draw conclusion: the minimum lifetime of the round-link chain is 49 073 cycles, position of the minimum lifetime is the joint between the straight arm and curved arm. The analysis results can provide basis for optimization design of the round-link chain.
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期刊类型引用(6)
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