【摘要】 测量轴承滚动体转速的方法有限，目前仅有基于电磁感应原理的滚动体磁化方法较为通用，但磁化滚动体的磁性不稳定，容易受到温度、碰撞等因素的影响，导致测量精度降低或测量方法失效。为进一步提高磁化法的测量可靠性，提出一种基于电磁感应原理的改进滚子转速测量方法，将对滚子进行磁化改为在滚子端面嵌入磁铁，以提高滚子磁场稳定性。利用有限元分析方法对测量装置进行模拟，分析得到滚子瞬时转速与环形线圈内感应电压频率的定量关系；通过行星轮试验得到的行星轮转速与环形线圈感应电压频率的对应关系与仿真结果一致，验证了提出的滚子转速测量方法的合理性与有效性；搭建圆柱滚子轴承测速与打滑测试平台，测量了滚子的瞬时转速与打滑率，测量值与理论值一致，验证了提出的滚子转速测量方法在实际工程应用中的可行性和准确性。更多还原

【Abstract】 The methods for measuring the rotational speed of bearing rolling elements are limited. At present, only the magnetization method for rolling elements based on electromagnetic induction principle is widely used. However, the magnetism of magnetized rolling elements is unstable and easily affected by factors such as temperature and collision, resulting in reduction of measurement accuracy or failure of measurement methods. To further improve the measurement reliability of magnetization method, an improved measurement method for rotational speed of rollers is proposed based on electromagnetic induction principle. The magnetization of rollers is changed to embed the magnets on end faces of rollers, enhancing the stability of magnetic field of rollers. The measuring device is simulated using finite element analysis method, and the quantitative relationship is obtained between instantaneous rotational speed of rollers and induced voltage frequency inside toroidal coil. The correspondence between rotational speed of planetary gear and induced voltage frequency inside toroidal coil is obtained by planetary gear test, which is consistent with simulation results, thus verifying the rationality and effectiveness of proposed method. A test platform is built for measuring the rotational speed and slip rate of cylindrical roller bearings, and the instantaneous rotational speed and slip rate of rollers are measured. The measured values are consistent with theoretical values, verifying the feasibility and accuracy of proposed method in practical engineering applications.更多还原