The impact of the accuracy class of bearings, rotational speed, load, clearances, and fits on the vibration levels of electric motor bearing units is investigated. The ways to reduce the vibrations of mechanical origin are offered. The boundary vibration levels of asynchronous motors limited by vibration levels of 40 dB at a frequency of 5 Hz and 80 dB at a frequency of 10,000 Hz are determined. The effect of increasing the rotational speed and load on the vibration levels of bearing units has been determined, and reserves for reducing vibration while ensuring the optimum bearing preload on the shaft journal have been identified. It is established that the clearance between the cap and the bearing when it is fixed in the housing (primer) does not ensure the unambiguity of the bearing unit assembly, which results in a large variation in vibration levels compared with rigid and elastic fixation. The results of this research can be applied to all types of traction electric motors.

研究了轴承精度等级，转速，负载，游隙和配合对电动机轴承单元振动水平的影响。提供了减少机械原点振动的方法。确定异步电动机的边界振动水平，该振动水平受5 Hz频率下40 dB的振动水平和10,000 Hz频率下80 dB的振动水平的限制。已经确定了提高转速和负载对轴承单元振动水平的影响，并且已经确定了减少振动的储备，同时确保了轴颈上的最佳轴承预负载。可以确定的是，当盖和轴承固定在壳体（底漆）中时，它们之间的间隙不能确保轴承单元组件的明确性，与刚性和弹性固定相比，这会导致振动水平发生较大变化。这项研究的结果可以应用于所有类型的牵引电动机。