As the main parts of mechanical equipment, the performance quality of bearings in the operation process will directly affect the normal operation performance of mechanical equipment. It is inevitable that abnormal state occurs in the process of bearing operation. The common abnormal state mainly includes noise, abnormal temperature rise, large vibration (shaft runout), excessive lubricant leakage and discoloration. Today I would like to share with you the types and Countermeasures of abnormal noise in the process of bearing use, hoping to help you.

轴承若处于良好的连转状态会发出低低的呜呜或嗡嗡声音。若是发出尖锐的嘶嘶音、吱吱音或其它不规则的声音，则很有可能表示轴承处于不良的连转状况。尖锐的吱吱噪音可能是由于不适当的润滑所造成的。不适当的轴承间隙也会造成金属声。

If the bearing is in a good continuous running state, it will make a low whine or buzzing sound. If there is a sharp hiss, squeak or other irregular sound, it is likely to indicate that the bearing is in a bad continuous running condition. Sharp squeaking noise may be caused by improper lubrication. Improper bearing clearance can also cause metallic noise.

常见的轴承运行异常噪音主要三种情况，分别为：大的金属噪音、规则的噪音和不规则噪音。

There are three kinds of common abnormal noise in bearing operation: large metal noise, regular noise and irregular noise.

01大的金属噪音

01 heavy metal noise

造成轴承发出大的金属噪音主要原因有异常负荷、安装不良、润滑剂不足、不适合等。针对轴承异常负荷的对策：修正配合，研究轴承游隙，调整预负荷，修正外壳挡肩位置。针对轴承安装不良的对策：提高轴、轴承座的加工精度，改善安装精度、安装方法。针对轴承润滑剂不足的对策：补充润滑剂，选择恰当的润滑剂。

The main reasons for the heavy metal noise of the bearing are abnormal load, poor installation, insufficient lubricant, unsuitable, etc. Countermeasures for abnormal load of bearing: correct fit, study bearing clearance, adjust preload and correct housing shoulder position. The Countermeasures for the poor installation of bearings are to improve the machining accuracy of shaft and bearing seat, and improve the installation accuracy and installation method. In view of the bearing lubricant insufficiency countermeasure: supplements the lubricant, chooses the suitable lubricant.

导轨丝杠

Guide screw

02规则噪音

02 regular noise

有时轴承在运转过程中会发生“呲啦-呲啦“的声音”，断断续续，并有规则的发生，这种就属于规则的噪音。造成轴承产生规则噪音的原因主要有：由于异物滚动面产生压痕、锈、伤痕，(钢渗碳后)表面变形和滚道面断裂。

Sometimes the bearing in the process of operation will occur "Yila - Yila" sound, intermittent, and regular occurrence, this belongs to the rule of noise. The main causes of bearing regular noise are: indentation, rust and scar on rolling surface caused by foreign matters, surface deformation (after carburizing) and raceway surface fracture.

针对异物滚动面产生压痕、锈、伤痕的轴承对策：更换轴承，清洗有关零件，改善密封装置，使用干净的润滑剂。针对轴承(钢渗碳后)表面变形的对策：更换轴承并注意其使用。针对轴承滚道面断裂的对策：更换轴承。

Bearing countermeasures for indentation, rust and scar on rolling surface of foreign matters: replace bearing, clean relevant parts, improve sealing device, and use clean lubricant. Countermeasures for surface deformation of bearing (Steel Carburized): replace the bearing and pay attention to its use. The countermeasure for the fracture of bearing raceway surface is to replace the bearing.

03不规则噪音

03 irregular noise

如果轴承运行中发生“吱啦吱啦”的声音，并且不会随着回转速度变化而变化，这种情况就属于不规则噪音，多见于小型轴承上。导致这种情况的主要有：游隙过大、异物侵入和球的损伤、断裂。针对轴承游隙过大的对策：研究配合及轴承游隙，修改预负荷量。针对轴承发生异物侵入的对策：研究更换轴承，清洗有关零件，改善密封装置，使用干净的润滑剂。

If the "creak" sound occurs in the operation of the bearing, and it will not change with the change of rotation speed, this situation belongs to irregular noise, which is more common in small bearings. The main causes of this situation are: excessive clearance, foreign body invasion and ball damage, fracture. For the bearing clearance is too large countermeasures: research fit and bearing clearance, modify the preload. In view of the bearing foreign matter invasion countermeasure: Research replacement bearing, cleaning related parts, improving sealing device, using clean lubricant.