EBZ55型掘进机回转平台不同工况下强度分析

EBZ55 rotary strength analysis under different working conditions

悬臂式掘进机是煤矿生产中应用广泛的巷道掘进设备,可以提高巷道的掘进效率。掘进机的回转平台是连接截割部与机身的重要部件,常受到截割部的冲击载荷,容易产生故障。为了提高掘进机的可靠性,以挖金湾煤业EBZ55型悬臂式掘进机为例,研究回转平台在不同工况下应力结构强度,建立EBZ55型悬臂式掘进机回转平台的有限元分析模型,并根据实际使用状态确定2种较为恶劣的极端工况。计算得到回转平台应力分布情况,回转平台最大应力小于材料的屈服强度,但存在应力集中较明显的区域。根据应力分析结果以及掘进机实际使用情况,提出了对回转平台结构的改进意见。

Cantilever mining header is a widely used roadway mining equipment in mines,which can improve the efficiency of roadway mining.The slewing platform of the header is an important part connecting the cutting part and the machine body,which is often subject to the impact load of the cutting part and prone to failure.In order to improve the reliability of the header,EBZ55 cantilever header was taken as an example to study the structural strength of the slewing platform under different working conditions,to establish the finite element analysis model of EBZ55 cantilever header slewing platform,and to determine the two kinds of extreme working conditions according to the actual conditions.The stress distribution of the rotary table was calculated,and the maximum stress of the rotary table was less than the yield strength of the material,but there were obvious areas of stress concentration.According to the stress analysis results and the actual use of the header,the improvement of the rotary table structure was proposed.