气冷转向辊的结构优化和应力分析

Structure Optimization and Stress Analysis of Air-Cooled Steering Roll

摘要: 气冷转向辊是热镀锌机组的重要设备，基于对旧气冷转向辊的失效分析，设计了新的气冷转向辊，对比旧气冷转向辊，新辊做了多个方面的结构优化：旧气冷转向辊在电机端无轴套，新气冷转向辊电机端添加了长247 mm壁厚77.5 mm的轴套。旧气冷转向辊自由端轴套尺寸长155 mm，壁厚62.5 mm，新气冷转向辊自由端轴套尺寸加长为200 mm，壁厚加厚为77.5 mm。侧板开口形状也不同，由旧辊的圆孔改为梯形孔；加强筋布置也有所调整；为确保新辊的正常工作，对新辊的应力状况进行了仿真计算和分析。为此，建立了新气冷转向辊的有限元计算模型，对新气冷转向辊进行了应力分析和热应力分析。在相同的工况条件下，对旧气冷转向辊和新气冷转向辊电机驱动端和自由端的应力情况作了对比计算。计算结果表明，新气冷转向辊在电机驱动端和自由端的应力状况都有明显的改善。

Abstract: The air-cooled steering roller is an important equipment of the hot-dip galvanizing unit. Based on the failure analysis of the old air-cooled steering roller, a new air-cooled steering roller is designed. Compared with the old air-cooled steering roller, the new roller has made structural optimization in many aspects: The old air-cooled steering roller has no shaft sleeve at the motor end, and the new air-cooled steering roller has added a shaft sleeve with a length of 247 mm and a wall thickness of 77.5 mm at the motor end. The free end shaft sleeve of the old air-cooled steering roller is 155 mm long and 62.5 mm thick. The free end shaft sleeve of the new air-cooled steering roller is 200 mm long and 77.5 mm thick. The opening shape of the side plate is also different, and the round hole of the old roller is changed into a trapezoidal hole; the arrangement of reinforcing ribs is also adjusted. In order to ensure the normal operation of the new roller, the stress condition of the new roller is simulated and analyzed. Therefore, the finite element calculation model of the new air-cooled steering roll is established, and the stress analysis and thermal stress analysis of the new air-cooled steering roll are carried out. Under the same working condition, the stress of the driving end and free end of the old air-cooled steering roller and the new air-cooled steering roller are compared and calculated. The calculation results show that the stress condition of the new air-cooled steering roller at the driving end and the free end of the motor has been significantly improved.