CAJ | 학술논문

通过在一球一柱型轴连轴承上预置多种常见故障，采用半消声室声压测试方法，考察了含单一轴承故障的汽车水泵工作噪声，基于声压和时频域分析方法研究了轴承故障对汽车水泵工作噪声特性的影响。由此表明当水泵工作于发动机怠速附近时，轴承故障对水泵工作噪声增量的影响最明显。单一故障下的噪声时域波形表现出不同的冲击性特征；水泵400 Hz～3000 Hz内的噪声声压谱随轴承故障类型的不同而变化。另外，滚动体磨损成为水泵噪声最敏感因素，使水泵噪声声压谱呈宽频特性。滚道面伤使水泵增加高频主声源成分，同时，润滑脂异物及轴向游隙偏大也将引发高频滚道声。这些噪声特性均为水泵轴承的故障提供了识别的依据。
통과재일구일주형축련축승상예치다충상견고장，채용반소성실성압측시방법，고찰료함단일축승고장적기차수빙공작조성，기우성압화시빈역분석방법연구료축승고장대기차수빙공작조성특성적영향。유차표명당수빙공작우발동궤태속부근시，축승고장대수빙공작조성증량적영향최명현。단일고장하적조성시역파형표현출불동적충격성특정；수빙400 Hz～3000 Hz내적조성성압보수축승고장류형적불동이변화。령외，곤동체마손성위수빙조성최민감인소，사수빙조성성압보정관빈특성。곤도면상사수빙증가고빈주성원성분，동시，윤활지이물급축향유극편대야장인발고빈곤도성。저사조성특성균위수빙축승적고장제공료식별적의거。
Several kinds of common faults were prepared in the ball-and-roller type bearings. Noise of a faulty bearing of an automobile water pump was tested with sound pressure method in semi-anechoic room. Influence of bearing faults on water pump noise performance was studied based on sound pressure and time-frequency domain analysis methods. The re-sults show that the bearing faults have obvious influence on the noise increment when the water pump is operating near the engine idle speed. The noise wave of the unitary bearing fault can display different shock wave characteristics in time do-main. The sound pressure spectrum of the noise from 400 Hz-3 000 Hz of the water pump varies with different bearing fault types. Roller worn-out is the most sensitive factor of the water pump noise and make the sound pressure of the noise to have broadband characteristics of frequency. New main noise sources which frequency was higher than the normal may appear for the pump due to raceway scars in the bearing. Meanwhile, grease impurity and large axial clearance can also cause high-fre-quency raceway noise. These noise characteristics have provided a basis for fault identification of water pump bearings.