轴承预紧力作用下电主轴系统动力学特性研究  

STUDY ON DYNAMIC CHARACTERISTICS OF MOTORIZED SPINDLE SYSTEM UNDER BEARING PRELOAD

作　　者：高峰[1] 贾伟涛 李艳[1] 张东亚[1] 程明科 吴文武 GAO Feng;JIA WeiTao;LI Yan;ZHANG DongYa;CHENG MingKe;WU WenWu(School of Mechanical and Precision Instrument Engineering&Key Lab,of Manufacturing Equipment of Shaanxi Province&Key Lab,of NC Machine Tools and Integrated Manufacturing Equipment of the Ministry of Education,Xi'an University of Technology,Xi'an 710048,China)

机构地区：[1]西安理工大学,机械与精密仪器工程学院,陕西省制造装备重点实验室,教育部数控机床及机械制造装备集成重点实验室,西安710048

出　　处：《机械强度》2020年第2期255-262,共8页Journal of Mechanical Strength

基　　金：陕西省重点研发计划项目(2018ZDXM-GY-074);陕西省自然科学基础研究计划(2019JM-148)资助.

摘　　要：考虑轴承预紧力这一非线性因素对轴承支承动态刚度的影响,建立了磨削电主轴系统动力学模型。在转子系统中考虑由于转子质量偏心而产生的不平衡力,采用数值积分方法研究电主轴转子系统在轴承不同预紧力、不同转速下系统的非线性动力学行为。结果表明:轴承预紧力是影响电主轴转子系统非线性动力学特性的一个重要因素,合理的选择转子系统的工作参数,可提高系统的稳定性。Considering the influence of the nonlinear factor of bearing preload on the dynamic stiffness of bearing support,a dynamic model of grinding motorized spindle system is established.Considering the unbalanced force caused by the eccentricity of the rotor mass in the rotor system,the numerical integration method is used to study the nonlinear dynamic behavior of the motorized spindle rotor system under different preload and rotating speeds.The results show that the bearing preload is an important factor affecting the nonlinear dynamic characteristics of the motorized spindle rotor system.Rational selection of the operating parameters of the rotor system can improve the stability of the system.

关 键 词：磨削电主轴系统 轴承预紧 非线性动力学 

分 类 号：TH113[机械工程—机械设计及理论]