Extend the maintenance and maintenance of TIMKEN angular contact ball bearings

In order for TIMKEN bearings to be fully utilized and to maintain their proper performance for a long time, regular maintenance (regular inspection) must be performed.
Through proper periodic inspections, early detection of failures and prevention of accidents are important to improve productivity and economy.
1, cleaning
When the angular contact ball bearing is removed for inspection, the appearance record is first recorded by photography. Also, verify the amount of lubricant remaining and sample the lubricant before cleaning the bearings.
a. The cleaning of the bearing is carried out by rough washing and fine washing, and a metal mesh frame can be placed on the bottom of the used container.
b. When rough washing, remove the grease or adhesive with a brush or the like in the oil. At this time, if the TIMKEN bearing is rotated in the oil, be careful that the rolling surface will be damaged by foreign matter or the like.
c. When washing finely, slowly rotate the bearing in the oil and carry out it carefully.
The cleaning agent generally used is a neutral non-aqueous diesel oil or kerosene, and a warm alkali liquid or the like is sometimes used as needed. Regardless of which cleaning agent is used, it is often filtered and kept clean.
Immediately after cleaning, apply anti-rust oil or anti-rust grease to TIMKEN bearings.
2, inspection and judgment
In order to judge whether the removed angular contact ball bearings can be reused, it is important to check the dimensional accuracy, rotation accuracy, internal clearance, mating surfaces, raceway surfaces, cages and seals.
Regarding the inspection result, it can be judged by a person who is using a conventional bearing or a proficient bearing.
The criteria for judgment vary depending on mechanical properties and importance, inspection period, and the like. Bearings must not be reused if they are damaged and must be replaced.
1) Breakage and defects of bearing components.
2) Peeling of the rolling surface of the raceway.
After the bearings have been installed, alignment may result in additional loads, friction and vibration of the angular contact ball bearings if not carefully aligned. These can accelerate fatigue and reduce bearing life and can damage the life of other machine parts. In addition, increased vibration and friction can greatly increase energy consumption and risk of premature failure.
3. Basic condition monitoring
During use, the basic external conditions of TIMKEN bearing operation are often monitored, such as temperature, vibration and noise measurements. These regular inspections will identify potential problems early and will prevent unexpected machine stops, enabling production plans, increased plant productivity and efficiency.
4, relubrication
During operation, the bearing is required to have the correct relubrication to perfect its performance. The method of bearing lubrication is divided into grease lubrication and oil lubrication. In order to make the bearing function well, first, choose a lubrication method that suits the conditions of use and the purpose of use. Lubricity of oil lubrication predominates if only lubrication is considered. However, grease lubrication has the advantage of simplifying the structure around the bearing.
5, remove
When the bearing will reach its end of life, it should be replaced. Although the bearing can no longer be used, properly replacing the original angular contact ball bearing and replacing the new bearing in time can promote the service life of the new TIMKEN bearing. First, the use of a suitable removal tool will help prevent damage to other machine components. Second, improperly removed technology can be hazardous to the operator.

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Timken spherical roller bearing fault maintenance precautions

Timken bearing fault characteristics show severe faults (usually, such as bearing damage, burns, sand cracking, raceways, beading, etc.) no more than a week old, equipment, larger capacity, faster, shorter Interval. Therefore, the actual bearing fault diagnosis, once the fault is discovered, its advanced function, should determine the fault of the spherical roller bearing decisively and repair as soon as possible.
  1. Selection and control of shaft and bearing chamber tolerance: After the bearing is pressed into the timken bearing, it should be flexible and unobstructed. If the obvious rotation is not flexible, it means that the size of the shaft is too large and the tolerance is lowered. If the spherical roller bearing is pressed into the shaft and turned by hand, there is a clear "sand" feeling, which may be that the tolerance of the shaft is too large or the roundness of the shaft is not good. Therefore, it is necessary to control the roundness when controlling the tolerance of the shaft and the bearing chamber. At present, many domestic manufacturers only control the tolerance and do not control the roundness.
    2, the assembly of the bearing: Because the bearing is a high-precision product, such as improper assembly can easily damage the bearing channel, resulting in bearing damage. Spherical roller bearings should have a special mold when assembling, can not be beaten at will, only a small circle of force when pressing the shaft, only a large circle when pressing the large circle. Air pressure or hydraulic pressure is required for assembly. When pressing, the upper and lower molds should be outside the horizontal state. If tilted, the timken bearing channel will be damaged due to the force, which will cause the bearing to produce a sound.
    3. Prevention of assembly of foreign objects: When the bearing is mounted on the rotor to make dynamic balance, it is easy to enter the iron filings generated during dynamic balancing into the bearing. Therefore, it is better to balance the load before loading the bearing. Some manufacturers have some oil or grease to lubricate the bearing chamber during assembly. However, it is often difficult for the operator to control the amount. If the oil or grease accumulates in the bearing chamber, the roller is in the centering roller. It is easy to enter the timken bearing along the shaft as the bearing rotates. It is best not to apply oil or grease to the bearing chamber. If it is not painted, it must be controlled not to accumulate in the bearing chamber.
     4, the prevention of paint rust: paint rust is characterized by multiple seals in the motor, the motor sounds very good when assembled, but after putting some time in the warehouse, the motor noise is very large, the bearing is removed Severe rust. In the past, many manufacturers thought that it was a bearing problem. After our constant publicity, the motor factory has now realized that it is mainly a problem of insulating varnish. This problem is mainly caused by the acidic substance volatilized by the insulating paint forming a corrosive substance under a certain temperature and humidity, which causes the tunken bearing channel to corrode and causes the spherical roller bearing to be damaged. The problem can only be achieved by selecting a good insulating varnish and venting it after drying for a while.
What we should cause is the performance of the bearing components in this flaw and other countries' vigilance, the failure is often very fast and very sudden. It is considered to be an example of measuring the rotor shaft end after two hours.
In the diagnosis of these counterfeit bearing faults, we should focus on high-quality timken bearings usually in the time domain spectrum and vibration conditions of the device, such events in the abnormal spectrum accumulation is normal, in order to determine in time when the spherical roller bearing failure, avoid equipment accident.

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