带式输送机超大型传动滚筒轴结构优化设计

Optimization Design of the Structure of the Ultra Large Transmission Drum Shaft for Belt Conveyors

针对传动滚筒轴长期运行发生疲劳失效的问题,以某超大型带式输送机传动滚筒轴为例,从滚筒轴材料选择,再建立滚筒轴的有限元模型,分析了滚筒轴的应力,得到滚筒轴的最大应力主要分布在安装轴承的轴肩过渡位置,基于滚筒轴的应力载荷谱,结合疲劳分析理论,研究计算得到滚筒轴的安全系数。对于滚筒轴轴肩过渡圆角处损伤最为严重的问题,提出了以滚筒轴质量最小为目标,通过优化迭代,增大了滚筒轴的安全系数。对于滚筒轴两端均安装联轴器的工况,特别加大设计安全系数。该研究对超大型滚筒轴的设计具有一定的指导意义,避免了设计缺陷引起的疲劳破坏。

In response to the problem of fatigue failure of the transmission drum shaft during long-term operation,taking the transmission drum shaft of a certain ultra large belt conveyor as an example,from the selection of drum shaft material,a finite element model of the drum shaft was established,and the stress of the drum shaft was analyzed.It was found that the maximum stress of the drum shaft was mainly distributed at the transition position of the bearing shoulder.Based on the stress load spectrum of the drum shaft and combined with fatigue analysis theory,the safety factor of the drum shaft was studied and calculated.For the most serious problem of damage at the transition fillet of the drum shaft shoulder,the goal of minimizing the mass of the drum shaft was proposed.Through optimization iteration,the safety factor of the drum shaft was increased.For the working condition where couplings are installed at both ends of the drum shaft,the design safety factor was particularly increased.This study has certain guiding significance for the design of ultra large drum shafts,avoiding fatigue damage caused by design defects.