关键词: 伺服电机, 异常噪声, 频谱, 模态频率, 轴承跑圈

Abstract: Aiming at the abnormal noise of a certain servo motor in the process of trial-manufacture. The noise, vibration, and modal frequency of the abnormal and normal prototypes were measured and compared. The results showed that the abnormal prototypes had obvious fractional frequency peak values in the frequency spectrum of the noise and vibration, and the axial modal frequencies of the shaft system were significantly lower than that of the normal prototype. Analysis indicated that the abnormal noise was caused by the bearing slipping fault, which was further confirmed by disassembling the prototypes. The abnormal noise was solved by improving the assembly process of the bearing.

Key words: servo motor, abnormal noise, frequency spectrum, modal frequency, bearing slipping fault