Bearing damage cause and measures
2015-07-13 by zysbearing
Deep groove ball bearing in operation can not be directly observed, tapered roller bearings, but by noise, vibration, temperature, and other conditions may be detectable in the bearing lubricant exception. Representative examples of bearing damage:
1. Cracked
Part of the gap cracks. The reasons are: the impact load host is too large, spindle and bearing with large amount of interference; also has a larger friction caused by peeling crack; installation poor accuracy; improper use (use copper hammer, Snap large foreign bodies) and friction cracks.
Solution: check conditions, while setting an appropriate examination material interference and improved installation and use, inspection lubricant to prevent friction cracks.
2, the raceway surface of the metal peeled
Peeling operation. After stripping was significantly uneven shape. Reasons bearing rolling elements and inner, are under periodic pulsating load outer ring raceway surface, resulting in periodic changes of contact stress. When the number of stress cycles reaches a certain value, the rolling elements or the outer ring on the work surface fatigue peeling roller track. If the bearing load is too large, this fatigue worse. In addition, the bearing is not properly installed, shaft bending, also have a roller peeling.
Solution: to re-examine the conditions of use and selection of bearings and clearance, and check the shaft and housing machining accuracy, installation method, lubricants and lubrication methods.
3, Burn
Bearing heat discoloration, and then burn can not be rotated. Cause burns usually insufficient lubrication, oil quality does not meet the requirements or deterioration, and the bearing assembly too tight and the like. Further clearance is too small and too high load (preload large) roller deflection.
Solution: Select the appropriate clearance (or increase clearance), to check the types of lubricants to ensure the injection amount, checking conditions of use, to prevent the positioning error, improve the bearing assembly methods.
4, the retainer fragmentation
Rivets loose or break, rolling broken. The reasons are: torque overload, lack of lubrication, frequent changes in speed, vibration, bearing mounted in an inclined state, Snap foreign body.
Solution: To find whether the status and conditions of use suitable lubrication, note the use of the bearing, the cage Study selection is appropriate and whether the rigidity of the bearing housing load requirements.
5. Creep
Radially inner surface or outer surface slippery, causing the mirror or discoloration, sometimes stuck. The reasons are: lack of interference with the Department, the sleeve tightened enough, abnormal temperature rise, the host load is too large and the like.
Solution: To re-examine the amount of interference is appropriate, checking conditions of use, check the accuracy of the shaft and the bearing housing.
6, rust corrosion
Partial or total surface rust, rolling changed lines like rust. The reasons are: bad state custody, improper packaging, lack of rust inhibitors, water intrusion acid, etc., directly with the hand bearing. Solution: To prevent rust in custody, regularly or irregularly re-oiled packaging, strengthen sealing performance, regularly check the oil, failure or deterioration of the oil should be replaced, to use the correct bearing.
1. Cracked
Part of the gap cracks. The reasons are: the impact load host is too large, spindle and bearing with large amount of interference; also has a larger friction caused by peeling crack; installation poor accuracy; improper use (use copper hammer, Snap large foreign bodies) and friction cracks.
Solution: check conditions, while setting an appropriate examination material interference and improved installation and use, inspection lubricant to prevent friction cracks.
2, the raceway surface of the metal peeled
Peeling operation. After stripping was significantly uneven shape. Reasons bearing rolling elements and inner, are under periodic pulsating load outer ring raceway surface, resulting in periodic changes of contact stress. When the number of stress cycles reaches a certain value, the rolling elements or the outer ring on the work surface fatigue peeling roller track. If the bearing load is too large, this fatigue worse. In addition, the bearing is not properly installed, shaft bending, also have a roller peeling.
Solution: to re-examine the conditions of use and selection of bearings and clearance, and check the shaft and housing machining accuracy, installation method, lubricants and lubrication methods.
3, Burn
Bearing heat discoloration, and then burn can not be rotated. Cause burns usually insufficient lubrication, oil quality does not meet the requirements or deterioration, and the bearing assembly too tight and the like. Further clearance is too small and too high load (preload large) roller deflection.
Solution: Select the appropriate clearance (or increase clearance), to check the types of lubricants to ensure the injection amount, checking conditions of use, to prevent the positioning error, improve the bearing assembly methods.
4, the retainer fragmentation
Rivets loose or break, rolling broken. The reasons are: torque overload, lack of lubrication, frequent changes in speed, vibration, bearing mounted in an inclined state, Snap foreign body.
Solution: To find whether the status and conditions of use suitable lubrication, note the use of the bearing, the cage Study selection is appropriate and whether the rigidity of the bearing housing load requirements.
5. Creep
Radially inner surface or outer surface slippery, causing the mirror or discoloration, sometimes stuck. The reasons are: lack of interference with the Department, the sleeve tightened enough, abnormal temperature rise, the host load is too large and the like.
Solution: To re-examine the amount of interference is appropriate, checking conditions of use, check the accuracy of the shaft and the bearing housing.
6, rust corrosion
Partial or total surface rust, rolling changed lines like rust. The reasons are: bad state custody, improper packaging, lack of rust inhibitors, water intrusion acid, etc., directly with the hand bearing. Solution: To prevent rust in custody, regularly or irregularly re-oiled packaging, strengthen sealing performance, regularly check the oil, failure or deterioration of the oil should be replaced, to use the correct bearing.