掘进机回转耳架改进前后的性能分析

Analysis of the Performance of Rotary Trunnion Before and After the Improvement of the Roadheader

回转耳架是掘进机的重要组成部分,在掘进机工作时,根据力学机制,回转耳架的耳板将受到较大的作用力。对掘进机水平和纵向截割时的回转耳架受力情况进行了分析,确定了回转耳架的最大受力位置,并对回转耳架模型最大受力位置加载相应的计算截割阻力,比较分析了改进前后的回转耳架性能,得出结论:改进后的回转耳架结构更合理,满足设计要求。

The rotary trunnion is an important part of the roadheader.When the roadheader is working,according to the mechanical principles,the cleat of the rotary trunnion will be subjected to a large force.The force situation of the rotary trunnion during the horizontal and longitudinal cutting of the roadheader was analyzed,the maximum stress position of the rotary trunnion was determined,the corresponding calculation cutting resistance was loaded to the maximum stress position of the rotary trunnion model,and the performance of the rotary trunnion before and after the improvement was compared and analyzed.It is concluded that the structure of the improved rotary trunnion is more reasonalde and can meet the design requirements.