摘要
针对矿用锚杆钻车钻箱主轴在井下复杂工况下易疲劳断裂、服役周期短的问题,采用有限元分析与实验验证相结合的方法,对主轴进行了设计优化与寿命预估研究。通过三维模型分析,发现键槽根部应力集中是花键疲劳断裂的主要原因。基于此提出过渡圆角优化、表面喷丸强化和双列圆锥滚子轴承支撑等改进措施,使应力集中系数降至1.8,动态承载能力提升30%。结合S-N曲线和Miner线性累积损伤理论,构建了寿命预测模型,优化后预估寿命提升至131 130次循环。研究及应用结果证实,寿命预估模型可靠,优化后主轴动态承载能力提升30%,工业应用实测寿命等效循环次数提升34.8%。
In response to the issue of the drill box spindle of mining anchor rod drilling vehicle being prone to fatigue fracture and having a short service life under complex underground working conditions,a combination method of finite element analysis and experimental validation was used to conduct research on the design optimization and life prediction of the spindle.Through three-dimensional model analysis,it was found that stress concentration at the root of the keyway is the main cause of spline fatigue fracture.Based on this,improvement measures such as transition fillet optimization,surface shot peening,and double-row tapered roller bearing support were proposed,reducing the stress concentration factor to 1.8 and increasing the dynamic load capacity by 30%.By integrating the S-N curve with Miner′s linear cumulative damage theory,a life prediction model was established,and the optimized estimated service life was enhanced to 131130 cycles.Research and application results have validated the reliability of the life prediction model.The optimized spindle demonstrates a 30%enhancement in dynamic load-bearing capacity,with industrial application actual measured life equivalent cycle times increased by 34.8%.
作者
叶竹刚
Ye Zhugang(Inner Mongolia Branch,Shanxi Tiandi Coal Mining Machinery Co.,Ltd.,Ordos 017209,China)
出处
《煤矿机械》
2025年第12期164-166,共3页
Coal Mine Machinery
关键词
锚杆钻车
钻箱主轴
设计优化
寿命预估
anchor rod drilling vehicle
drill box spindle
design optimization
life prediction
