495HR电铲回转减速箱耳座焊缝区开裂原因及焊修工艺  

Cracking cause and welding and repair process of 495HR electric shovel rotary reducer in the ear base of welding area

作　　者：方立强 张永强 李贺 潘雷雷 FANG Liqiang;ZHANG Yongqiang;LI He;PAN Leilei(Equipment Maintenance Center,China Energy Group Zhunge'er Energy Co.,Ltd,Ordos 010300,China)

机构地区：[1]国能准能集团有限责任公司设备维修中心,内蒙古鄂尔多斯010300

出　　处：《露天采矿技术》2023年第2期126-128,共3页Opencast Mining Technology

摘　　要：通过对495HR电铲回转减速箱耳座异常开裂现象的研究,发现该裂纹系疲劳裂纹,主要成因包括设备点检不到位、耳座焊缝设计缺陷及设备使用工况较差导致的裂纹延伸扩展;根据现场检修状况并结合已有检修设备,提出了切实可行的焊接修复工艺方案。结果表明:工艺方案可成功修复495HR电铲回转减速箱耳座开裂。Through researching on the abnormal cracking phenomenon of the ear base of 495HR electric shovel rotary reducer,we find that the crack is a fatigue crack.The causes include inadequate spot inspection of equipment,design defects of ear base welds and crack extension and expansion caused by poor service conditions of equipment.According to the on-site maintenance conditions and combined with the existing maintenance equipment,this article proposes a feasible welding repair process scheme.The results show that the scheme can successfully repair the cracking of the ear base of 495HR electric shovel rotary reducer.

关 键 词：495HR电铲 回转减速箱 耳座 裂纹 焊修工艺 

分 类 号：TD422.21[矿业工程—矿山机电]