Precautions for Clearance Detection on Timken Bearing Tightening Sleeve
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Influence of Radial Clearance Adjustment of Fully loaded Cylindrical Roller Bearing on load
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2022年3月27日

The Failure Causes of Four Row Cylindrical Roller Bearings in Use are Analyzed

  • During the operation of the mechanism, the part where the rod end joint bearing is installed is allowed to have a certain temperature. When touching the shell of the mechanism by hand, it should be normal not to feel hot. On the contrary, it indicates that the temperature of SKF Bearing is too high.The Failure Causes of Four Row Cylindrical Roller Bearings in Use are Analyzed
  • SKF Bearing temperature is too high due to: the quality of lubricating oil is unqualified or deteriorated, and the viscosity of lubricating oil is too high; The mechanism assembly is too tight (insufficient gap); The assembly of rod end joint bearing is too tight; The bearing race rotates on the shaft or in the shell; Excessive load; Broken bearing cage or body, etc.
  • The SKF Bearing is allowed to make slight running noise in the office. If the noise is too large or there is abnormal noise or impact sound, it indicates that the rod end joint bearing is faulty.The Failure Causes of Four Row Cylindrical Roller Bearings in Use are Analyzed

1. Maintenance, overhaul and abnormal handling of bearings

In order to maintain the original performance of the rod end joint bearing in good condition for as long as possible, it is necessary to maintain and repair in order to prevent accidents, ensure the reliability of operation and improve the productivity and economy. Maintain the operation standard of corresponding mechanical operation conditions and carry out it regularly. The contents include monitoring the operation status, replenishing or changing lubricants, and regular disassembly inspection.

As the maintenance items in operation, there are SKF Bearing rotation sound, vibration, temperature, lubricant state and so on.

The Failure Causes of Four Row Cylindrical Roller Bearings in Use are Analyzed

2. Bearing damage and Countermeasures

Generally, if the rod end joint bearing is used correctly, it can be used until the fatigue life is reached. However, there will be accidental and premature damage, which is not resistant to use. This early damage, as opposed to fatigue life, limits the use of quality known as failure or accident. Most of them are caused by careless installation, use and lubrication, foreign matters invading from the outside, and insufficient research on the thermal effects of shafts and shells.The Failure Causes of Four Row Cylindrical Roller Bearings in Use are Analyzed

 

The Failure Causes of Four Row Cylindrical Roller Bearings in Use are Analyzed
  • The reasons for the failure of imported bearings are often multifactorial. All the influencing factors in the design and manufacturing process will be related to the failure of four row cylindrical roller bearings, which is difficult to judge by analysis. In general, it can be considered and analyzed from two aspects: use factors and internal factors.The Failure Causes of Four Row Cylindrical Roller Bearings in Use are Analyzed
  • Use factors mainly refer to whether the installation, adjustment, use and maintenance, maintenance and repair meet the technical requirements. The installation condition is one of the primary factors in the use factors. The improper installation of the four row cylindrical roller bearing often leads to the change of the stress state between the parts of the whole bearing, and the bearing operates in an abnormal state and fails early. 
  • According to the technical requirements of bearing installation, use, maintenance and repair, monitor and inspect the load, speed, working temperature, vibration, noise and lubrication conditions borne by the running bearing, find out the cause immediately and adjust it to make it return to normal. In addition, it is also important to analyze and test the quality of grease and the surrounding medium and atmosphere.The Failure Causes of Four Row Cylindrical Roller Bearings in Use are Analyzed
  • 1. If you hear the noise from the inlet, first of all, it is important to find the location where the noise occurs. There are many moving parts that may produce noise, or some rotating parts may come into contact with non rotating parts. If it is confirmed that the noise in the four row cylindrical roller bearing may have been damaged and need to be replaced.
  • 2. Since the working conditions leading to the failure of both sides of the front are similar, even if only one is broken, it is recommended to replace it in pairs.
  • 3. Import is relatively sensitive, and correct methods and appropriate tools need to be adopted in any case. During storage, transportation and installation, the components of the bearing shall not be damaged. A large pressure is required to press in, so a special tool is required. Be sure to refer to the instructions.The Failure Causes of Four Row Cylindrical Roller Bearings in Use are Analyzed
  • 4. It should be installed in a clean and tidy environment. The entry of small particles will also shorten the service life of four row cylindrical roller bearings. It is very important to keep a clean environment during replacement. It is not allowed to knock with a hammer. Be careful not to fall on the ground (or similar improper handling). Even if the fit is small, the front axle seat will be damaged.The Failure Causes of Four Row Cylindrical Roller Bearings in Use are Analyzed
  • The metallurgical quality of imported bearing materials was once the main factor affecting the early failure of rolling bearings. With the progress of Metallurgical Technology (such as vacuum degassing of bearing steel), the quality of raw materials has been improved. The proportion of raw material quality factor in bearing failure analysis has decreased significantly, but it is still one of the main influencing factors of four row cylindrical roller bearing failure. Proper material selection is still a factor that must be considered in bearing failure analysis.The Failure Causes of Four Row Cylindrical Roller Bearings in Use are Analyzed
  • The main task of imported bearing failure analysis is to find out the main factors causing bearing failure according to a large number of background materials, analysis data and failure forms, so as to put forward targeted improvement measures, prolong the service life of four row cylindrical roller bearings and avoid sudden early failure of bearings.The Failure Causes of Four Row Cylindrical Roller Bearings in Use are Analyzed