Check the Fault of SKF Combined Bearing in Operation and Take Necessary Measures
2022年3月30日
Solving measures and principles of IKO plastic bearing noise
2022年3月30日

Adjustment method of SKF universal joint Bearing Damage

Adjustment method of SKF universal joint Bearing Damage

  • 1. Listening: using hearing to identify irregular operation is a very common method. For example, using a screwdriver or electronic stethoscope to detect a simple abnormal noise is a method often used by experienced operators and maintenance personnel.
  • The damage degree of SKF Bearing in use can be determined by listening, touching and observing.
  •  If the universal joint bearing is in good operation, it will make a low whine sound. If the bearing makes sharp hiss, squeak and other irregular sounds, it may indicate that the bearing is in poor operation.Adjustment method of SKF universal joint Bearing Damage
  • 2. Touch: high temperature often indicates that SKF Bearing has been in abnormal condition, and high temperature is also harmful to the lubricant in the bearing. However, the high temperature of the bearing is caused by the lubricant in the bearing at some times. If the universal joint bearing operates for a long time at a temperature exceeding 120 ℃, the service life of the bearing will be reduced. 
  • The causes of bearing high temperature include insufficient or excessive lubrication of lubricant, impurities in lubricant, excessive load, bearing damage, insufficient clearance and friction caused by oil seal. 
  • Under normal circumstances, the bearing will have a natural temperature rise just after lubrication or after lubrication, and it will last for one to two days.Adjustment method of SKF universal joint Bearing Damage
  • 3. Observation: if the SKF Bearing is well lubricated and there are no sundries and moisture, it indicates that the oil seal of SKF Bearing is not worn. If the original bearing box is opened, visually check the universal joint bearing and regularly check the oil seal. 
  • Check the condition of the oil seal near the bearing to ensure that they are sufficient to prevent hot liquid, corrosive liquid and gas from penetrating into the bearing along the axis. 
  • If the oil seal is damaged, replace it as soon as possible. Check the automatic lubrication system to ensure that the oil or grease enters the bearing and the correct amount is added. 
  • At the same time, check whether the lubricant is discolored or blackened. If so, it usually indicates that the lubricant contains impurities, which is also harmful to the use of the bearing.Adjustment method of SKF universal joint Bearing Damage
Adjustment method of SKF universal joint Bearing Damage

Adjustment method of SKF universal joint Bearing Damage

  • The clearance of SKF Bearing refers to the large amount of activity made by the other ring along the radial or axial direction when one ring is fixed, so the clearance is divided into radial clearance and axial clearance. When assembling the universal joint bearing, the clearance shall not be too large or too small. 
  • Too large clearance will reduce the number of rolling elements bearing load at the same time and increase the load of a single rolling element, so as to reduce the rotation accuracy and service life of the bearing;
  •  If the clearance is too small, the friction will increase, the heat generated will increase, and the wear will be intensified, which can also reduce the service life of the bearing. Therefore, the clearance of SKF Bearing should be strictly controlled and adjusted during assembly.Adjustment method of SKF universal joint Bearing Damage
  • Preloading is to give an axial force to the inner or outer ring of SKF Bearing during assembly, so as to eliminate the bearing clearance and make the initial deformation at the contact between the rolling element and the inner and outer rings. 
  • Preloading can improve the stiffness and rotation accuracy of the bearing in the working state. Most bearings with large load and high rotation accuracy requirements work in the state of no clearance or even a small amount of interference. Adjustment method of SKF universal joint Bearing Damage
  • In this case, it is necessary to preload the universal joint bearing during assembly. The clearance adjustment and pre tightening are usually completed by making appropriate axial relative displacement of the inner ring to the outer ring. 
  • It is not difficult to see from the above technological concepts that the bearing capacity and rotation accuracy of SKF Bearing can be improved and the service life of the bearing can be improved by adjusting the clearance of rolling bearing. 
  • But at the same time, it will aggravate the bearing friction and increase the calorific value, so good lubrication and heat dissipation must be ensured when adjusting the clearance or preload. 
  • Improper adjustment or poor lubrication will in turn aggravate the wear of universal joint bearing and reduce its service life.Adjustment method of SKF universal joint Bearing Damage
Technical requirements for Timken non-standard bearing