摘要
为研究滚动轴承在高速周期载荷作用下的振动特性,基于滚动轴承的动力学方程,以61896深沟球轴承为研究对象,开展轴承在简谐周期力作用下的动力学仿真分析,探究滚动轴承的振动响应特性,明确对轴承影响最大的模态频率及幅频关系,并以此探究激振频率、轴承球体材料及数量等轴承参数对轴承动刚度的影响规律。研究发现:结构1阶固有频率为轴承共振位移最大点,其内圈和滚子破坏较为严重。而且,随着激励频率的增加,轴承振动位移值呈现出先增大后减小趋势,当达到共振频率时,位移值急剧增加。此外,在达到1阶频率之前,轴承的动刚度随激振频率的增加而减小,随球体个数的增加而增加;球材料变化时,轴承动刚度随频率的变化曲线也随之改变,其中陶瓷氮化硅Si3N4动刚度较好。
The vibration characteristics of rolling bearings under high-speed periodic load are studied.Based on the dynamic equation of rolling bearing,with the 61896 deep groove ball bearing as the research object,dynamic simulation analysis of the bearing is carried out under the action of simple harmonic periodic force.The vibration response characteristics of rolling bearing are explored.The relationship between the modal frequency and amplitude-frequency that have the greatest influence on the bearing is clarified.On this basis,the influence law of bearing parameters,such as excitation frequency,material and number of bearing balls on bearing dynamic stiffness,are explored.It is found that the first order natural frequency of the structure is the maximum point of bearing resonance displacement,and the inner ring and roller are seriously damaged.Moreover,with the increase of excitation frequency,the vibration displacement value of the bearing shows a trend of increasing first and then decreasing.When it reaches the resonance frequency,the displacement value increases rapidly.In addition,before reaching the first frequency,the dynamic stiffness of the bearing decreases with the increase of excitation frequency and increases with the increase of the number of balls.When the ball material changes,the curve of dynamic stiffness of bearing against the frequency also changes.Among all the ball materials,the dynamic stiffness of ceramic silicon nitride Si3N4 is the best.
作者
万光海
王全龙
武美萍
韩志平
WAN Guanghai;WANG Quanlong;WU Meiping;HAN Zhiping(School of Mechanical Engineering,Jiangnan University,Wuxi 214122,Jiangsu,China;Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology,Jiangnan University,Wuxi 214122,Jiangsu,China;Jiangsu Fasten Group Co.,Ltd.,Jiangyin 214400,Jiangsu,China)
出处
《噪声与振动控制》
CSCD
北大核心
2024年第4期37-42,共6页
Noise and Vibration Control
基金
国家自然科学基金资助项目(51705202)
江苏省自然科学基金资助项目(BK20170191)
江苏省博士后科研资助计划项目(2021Z325)。
关键词
振动与波
简谐周期力
模态分析
谐响应分析
动刚度
影响因素
vibration and wave
harmonic periodic force
modal analysis
harmonic response analysis
dynamic stiffness
influencing factor
