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INA bearing common faults and methods
Source: China Bearing Network Time: 2018-02-02
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Rolling bearing; if it can be correctly selected and used without fault; it can be used for a long time, in the correct selection and correct use; the damage condition is stripping. On the other hand; there is accidental early damage and cannot be used. Early damage, as the cause of the early damage; there are no smooth thinking, no foreign matter intrusion, and thus the bearing equipment error and shaft deflection, the accuracy of the shaft and bearing box, data research, etc. can be said; These conditions are more common than each other. Therefore, it is necessary to clarify the condition before and after the attack on the basis of the machine, the operating conditions and the peripheral layout of the bearing; and then contact the bearing damage status and various reasons for investigation; It is possible to avoid the recurrence of similar incidents, so that the bearing life reaches a higher period; inventing higher value.
Peeling damage condition When the bearing receives the rotation of the load; the raceway surface or the rolling surface of the inner and outer rings have a scale-like peeling appearance due to tumbling fatigue.
reason
1. The load is too large.
2. Poor equipment (non-linear), moment load, foreign matter intrusion, water ingress.
3. Poor smoothness, smoothing agent is not suitable for bearing clearance is not appropriate.
4. The accuracy of the bearing housing is not good; the rigidity of the bearing housing is not large.
5. The development caused by rust, corrosion spots, abrasions and indentations (representation of appearance deformation).
Method
1. Check the size of the load and the bearings used in the re-discussion
2. Improve equipment methods; improve sealing equipment, stop rust prevention.
3. Use a smoothing agent of the right viscosity to improve the smoothness.
4. View the accuracy of the shaft and bearing housing.
5. View the clearance.
Card injury condition
1. The so-called card injury is due to the appearance of some minor burns on the sliding surface injury and the appearance of the external damage.
2. Linear flaws in the circumferential direction of the slide surface and the rolling surface.
3. Cycloidal flaws on the end of the roller.
4. A card injury near the collar surface of the roller end face.
reason
1. Excessive load, excessive preload.
2. Poor smooth.
3. Foreign body bites into.
4. The outer ring outer ring is skewed and the axis is deflected.
5. The accuracy of the shaft and bearing housing is poor.
Method
1. View the size of the load.
2. Preload should be appropriate.
3. Improve the smoothing agent and smooth method.
4. View the accuracy of bearings and shafts, bearing housings.
The so-called abrasion of the scratched condition; it is on the raceway surface and the rolling surface; the external damage caused by the summary of the small burns following the tumbling slip and the oil film thermal cracking attack, the attack with the appearance of the rough appearance of the adhesion.
reason
1. High speed light load.
2. Rapid acceleration and deceleration.
3. Smoothing agent is not appropriate.
4. Intrusion of water; preloading is not appropriate.
Method
1. Improve bearing clearance.
2. Use a good oily smoothing agent.
3. Improve the smooth method.
4. Improved sealing equipment; improved pre-cracking damage condition, so-called cracking; means that some cracks are caused by some impact or excessive load on the rib of the bearing ring or the rolling element, and there is a significant drop or All cracks.
reason
1. The equipment was shocked.
2. When the load is too large.
3. Poor use and other reasons.
Method
1. Improve equipment methods (use hot clothes; use the right things).
2. Correct the load conditions.
3. The bearing equipment is in place; the rib is supported.
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