基于边频带分析的齿轮故障诊断研究

Study on Gear Fault Diagnosis Based on Sideband Analysis

齿轮啮合时边频率带携有大量的有效信息。齿轮点蚀时边频带阶数少而集中在啮合频率及其谐频的两侧,左右基本对称;出现裂纹时啮合频率两侧边频对应幅值明显不对称,且两侧幅值变化较大;齿端折断时一阶啮合频率两侧有少量的边频带且两侧不对称,一侧边频幅值是另一侧边频幅值的2~3倍;轮齿折断时伴有啮合频率的高次谐波成分,且两侧有边频现象,啮合频率左侧高次边频幅值升高,啮合频率右侧2次边频幅值升高,一般会超过啮合频率处的幅值。边频分析的结果与拆箱检查情况基本吻合,验证边频分析的可靠性。

When the gear meshes, sideband conveys lots of useful information. When the gear appears pitting, sideband degree is less and focuses on both sides of the meshing frequency and its harmonic frequency with basic symmetry. When the crackles appear, the meshing frequency on both sides of the corresponding amplitude frequency is obviously asymmetric. When the tooth end breaks, first degree meshing frequency has little sideband on both sides with asymmetry, and side frequency amplitude of one side is two or three times of the other. Side frequency analysis is in agreement with the unpacking inspection to verify the reliability of side fre-quency.