基于双冲击特征的无转速计混合陶瓷球轴承剥落区宽度估计

摘要

A method based on vibration signal was introduced for evaluating the spall size of rolling ball bearings,which utilizes the interval measurement of double impulses generated by the spall and the rotor speed of the bearing mounted shafts.However,the measurement of rotor speed is not convenient under some working conditions.To solve this issue,a method based on double impulses was proposed without a speed meter.The rotor-speed estimated by counting the number of impulses in a full rotating cycle of the shaft.By combining the rotor speed and average double-impulse intervals,the new method realizes spall size estimation without a speed meter.It is thus appropriate for engineering applications.Experimental results indicate that the proposed method is valid.%首先介绍了一种基于振动信号分析的滚动球轴承剥落区宽度估计的方法,该方法可根据振动信号中的双冲击特征间隔和所在转轴的转速,完成对剥落区宽度的估计,但转速计的安装易受工况条件的限制,对此提出了一种基于滚动轴承剥落故障对应冲击特征的无转速计剥落区宽度估计方法,该方法通过振动信号中整周期的冲击次数实现转速估计,结合平均双冲击特征实现了无需转速计的混合陶瓷球轴承的剥落区宽度估计,使该方法更适合于工程应用.试验结果表明,所提方法可对混合陶瓷球轴承剥落区宽度进行有效估计.