摘要
针对振动机械滚动轴承内、外圈单点点蚀故障,通过分析轴承工作状况及钢球通过缺陷时接触变形量和弹性接触力的变化,建立了振动机械轴承内、外圈单点点蚀故障的动力学模型,并通过数值仿真得到了振动机械轴承内、外圈单点点蚀故障频谱。以振动筛为载体进行试验研究,验证了理论模型的正确性及有效性。理论分析与试验结果一致表明:振动机械轴承外圈单点点蚀故障时的故障包络谱中有较为明显的调制现象,内圈单点点蚀故障时的包络谱有轻微的调制现象,与旋转机械轴承内外圈单点点蚀故障谱有明显的区别。
Aiming at single point corrosion fault of inner and outer ring of rolling bearings used in vibrating machines, the dynamic model for fault is established according to analysis of working conditions of bearings and variation of contact deformation amount and elastic contact force when balls pass through defect.The frequency spectrum is obtained by nu-merical simulation.Taking vibrating screen as an object,the experimental study is carried out.The validity and effec-tiveness of theoretical model are verified.The theoretical analysis and experimental result show that the spectrum enve-lope of single point corrosion fault of outer ring of rolling bearings has relatively obvious modulation phenomenon,the spectrum envelope of single point corrosion fault of inner ring has slight modulation phenomenon,which has obvious difference from fault spectrum of single point corrosion of inner and outer ring of rolling bearings for rotating machine.
出处
《轴承》
北大核心
2015年第5期41-46,共6页
Bearing
基金
国家自然科学基金青年科学基金项目(51105292)
教育部博士点基金项目(20126120110009)
陕西省科技攻关项目(2013K07-09)
陕西省教育厅专项基金项目(2013JK1032)
关键词
滚动轴承
振动机械
点蚀
故障诊断
力学模型
rolling bearing
vibrating machine
point corrosion
fault diagnosis
mechanical model
