Do you know the failure mechanism of rolling bearings?

• Posted by Chen Zhixing November 2, 2022 Filed in Business #rolling bearings  42 views
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  For staff who are new to the bearing industry, many people do not know what the failure mechanism of rolling bearings is. Take a look: mainly abrasive wear, micro-motion wear, corrosion wear, scratching, gluing, fatigue stripping, etc.

   

  1. Corrosion and wear

  During the operation of rolling bearings, water, gas and corrosive media are inevitable. These substances will cause the rolling bearing to rust and corrosion. In addition, the rolling bearing will also be subject to micro-current and static electricity in operation, which will cause current corrosion of the rolling bearing. Rolling bearing rust and corrosion can lead to the collar. Pit rust and pear skin rust on the surface of the rolling body eventually lead to bearing failure.

   

  

  Overhead Conveyor Roller Turn Rollor

   

  2. Scratch

  Rolling bearing in the process of operation, larger hard impurities into the bearing gap. When relative motion occurs, the impurities do not move at the same speed. The resulting velocity difference will produce shallow marks or deep grooves on the surface, which will lead to bearing performance degradation.

   

  3. Abrasive wear

  Due to the different working conditions of bearings, the degree of bearing wear is also different. Under normal working environment, there will also be abrasive particles (such as dust, sand and other hard particles) into the bearing surface; when the bearing is working, abrasive particles will use the bearing surface as grinding plane, which will damage the surface and make the bearing performance deteriorate sharply before life, mainly in starting, stopping or shaft. When edge contact occurs between the neck and the bearing, the expected life will lead to geometric changes, loss of accuracy and increased bearing clearance.

   

  4. Micro-motion wear

  When the rolling bearing is in non-working condition, due to the external vibration load, or in a slight oscillation state, the rolling body in the raceway contact area near the relative motion will occur, because the range of motion is very small. Lubricating oil can not be redistributed in the contact area surface, so that the metal surface in the participation of oxygen direct contact and interaction, resulting in metal surface corrosion and metal oxide debris. This phenomenon is called the micro-motion wear of rolling bearings, which is an unavoidable wear caused by the external environment.

   

  5. Solid well

  Long-term continuous operation or improper maintenance of the bearing, as well as excessive load, will cause the overall temperature of the bearing to rise sharply, resulting in the rupture of the lubricating film; without lubrication and heavy load, adhesion will occur on the bearing surface, and if relative motion occurs, the bearing surface will break or the bearing will not be transportable. Rotation.

   

  6. Fatigue exfoliation

  Long-term heavy load work will make the metal of the bearing surface reach its fatigue limit. Crack-like fatigue cracks will appear on the surface perpendicular to the direction of motion, and then gradually expand. Finally, the metal will be fatigue exfoliated, resulting in the bearing losing its working performance.

   

  Due to the complex use and changeable environment of rolling bearings, the loss of working performance of rolling bearings is a comprehensive performance of various failure modes.