混合预紧下高速电主轴涡动频率的理论研究

发布时间：2018-06-04 05:01

本文选题：角接触球轴承 + 高速电主轴　；参考：《北京工业大学学报》2015年06期

【摘要】：为了有效预测并控制高速电主轴的支撑刚度和临界转速,建立了角接触球轴承在混合预紧机理下的数值计算模型,对主轴系统进行有限元建模,耦合轴承组模型与转轴模型构成转轴-轴承模型.通过对整体模型计算获得主轴系统的动态特性参数,将结果反代入整体模型,进而进行循环迭代,从而研究主轴涡动频率.制定转轴-轴承模型动力学计算流程,研究了电主轴在不同工况下轴承支撑刚度和涡动频率等动态特性.理论计算结果表明:与传统计算方法相比,所建模型计算电主轴在高速运转时的动态特性具有更高精度.采用合理的预紧方式和预紧力有利于提高主轴系统在高速运转时的临界频率.
[Abstract]:In order to effectively predict and control the support stiffness and critical speed of high speed motorized spindle, a numerical model of angular contact ball bearing under mixed preloading mechanism was established, and the finite element model of spindle system was established. The coupling bearing group model and the rotary shaft model constitute the rotary shaft-bearing model. The dynamic characteristic parameters of the spindle system are obtained by calculating the whole model, and the results are reversed into the global model, and then the cycle iteration is carried out to study the swirl frequency of the spindle. The dynamic calculation flow of rotary shaft-bearing model was established and the dynamic characteristics of bearing support stiffness and vortex frequency of motorized spindle under different working conditions were studied. The theoretical results show that compared with the traditional calculation method, the model has higher accuracy in calculating the dynamic characteristics of motorized spindle at high speed. Using reasonable preload and preloading force can improve the critical frequency of spindle system at high speed.
【作者单位】：北京工业大学机械工程与应用电子技术学院;中国兵器工业第二八研究所;
【基金】：国家“863”计划资助项目(SS2012AA040702) 科技重大专项(2011ZX04016-011)
【分类号】：TG659

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