轴承径向跳动气压驱动精密测量方法研究  

Research on precision measurement method of pneumatic drive for radial run-outof bearing

作　　者：王峻峰[1] 赵文辉[1] 王飞[1] 陈久旭 毛力[1] Wang Junfeng;Zhao Wenhui;Wang Fei;Chen Jiuxu;Mao Li(Shenyang University of Technology,Shenyang 110000,China)

机构地区：[1]沈阳工业大学,沈阳110870

出　　处：《仪器仪表学报》2024年第12期149-156,共8页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(51975386)项目资助。

摘　　要：为实现P4/P2级角接触球轴承外圈径向跳动的在线自动测量,提出了相对法气压驱动精密测量方法,并研制了测量装置。采用有限元分析计算了电机驱动和气压驱动对测量精度的影响,结果显示采用气压驱动方式对测量精度的影响小于电机连续驱动方式,确定了以气压驱动作为测量装置的驱动方式。基于三角函数变换的测量误差与轴线偏差之间的几何关系,建立了轴承轴向垂直偏差角、偏移量和径向垂直偏差角与测量误差的非线性数学模型。数值分析结果显示轴向垂直偏差角在0°~0.1°,偏移量在0~0.1 mm,径向垂直偏差角在0°~0.1°时,综合测量误差的最大值为外圈径向跳动量的7.5×10^(-6)倍。最后,以2组7008C/P4级角接触球轴承(出厂检定外圈径向跳动为2、3μm)进行精度验证。结果表明:测量重复精度为0.3μm。In order to achieve the online automatic measurement of the radial runout of the outer ring of P4/P2 angular contact ball bearings,a relative Pneumatic driven precision measurement method is proposed and a measuring device is developed.The influence of motor drive and pneumatic drive on the measurement accuracy is calculated by finite element analysis.The results show that the influence of pneumatic drive on the measurement accuracy is less than that of motor continuous drive,and the pneumatic drive is determined as the driving mode of the measuring device.A nonlinear mathematical model of the axial vertical deviation angle,offset and radial vertical deviation angle of the bearing,as well as the measurement error,is established based on the geometric relationship between the aforementioned variables and the axis deviation of the trigonometric function transformation.The results of the numerical analysis demonstrate that when the axial vertical deviation angle is within the range of 0°~0.1°,the offset is within the range of 0~0.1 mm,and the radial vertical deviation angle is also within the aforementioned range,The maximum value of comprehensive measurement error is 7.5×10^(-6) times the radial runout of the outer ring.Finally,two groups of 7008C/P4 angular contact ball bearings(factory-verified outer ring radial run-out of 2,3μm)were employed for accuracy verification.The results indicate that the measurement repeatability is 0.3μm.In order to achieve the online automatic measurement of the radial runout of the outer ring of P4/P2 angular contact ball bearings,we proposed a relative Pneumatic driven precision measurement method and have developed an accompanying measuring device.Through finite element analysis,we assessed the influence of both motor drive and pneumatic drive on the measurement accuracy.The results show that pneumatic drive exerts a lesser influence on accuracy compared to continuous motor drive,leading us to adopt pneumatic actuation for our device.A nonlinear mathematical model of the axial

关 键 词：径向跳动 气压驱动 相对测量法 光栅位移传感器 精度验证试验 

分 类 号：TH133[机械工程—机械制造及自动化]