基于共振法的第三代轮毂轴承负游隙测量技术研究

Research on Measuring Technology for Negative Clearance of Third Generation Hub Bearings Based on Resonance Method

针对第三代轮毂轴承负游隙难以直接测量的问题,基于Hertz接触理论推导出了第三代轮毂轴承载荷与变形的关系,构建了第三代轮毂轴承负游隙与轴向接触副共振频率的关系曲线;根据幅频特性曲线提出了测量轮毂轴承接触副固有频率的简化共振法模型并研制了第三代轮毂轴承负游隙在线测量仪。由激励器激励轮毂轴承使其产生共振,通过LabVIEW软件采集与分析轮毂轴承共振的特征频率,从而实现第三代轮毂轴承负游隙的在线测量。研究结果表明:第三代轮毂轴承负游隙与接触副共振频率之间存在一定的映射关系,测量值与理论计算值具有较好的一致性,能够满足第三代轮毂轴承负游隙在线测量的工业要求。

The negative clearance of third generation hub bearings is difficult to measure directly,the relationship between load and deformation of the bearings is derived based on Hertz contact theory,and the relationship curve is plotted between negative clearance of the bearings and resonance frequency of axial contact pair.According to amplitude-frequency characteristic curve,a simplified resonance method model is proposed for measurement of natural frequency of contact pair of hub bearings,and the online measuring instrument is developed for negative clearance of third generation hub bearings.The hub bearings are excited by exciter to generate resonance,the characteristic frequency of resonance of hub bearings is collected and analyzed by using Labview software,and the online measurement of negative clearance is realized.The research results show that there is a certain mapping relationship between negative clearance of third generation hub bearings and resonance frequency of contact pair,and the measured value agrees well with theoretical calculation value,the industrial requirements are met for online measurement of negative clearance of third generation hub bearings.