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The Influence of the Check on the Use of Angular Contact Ball Bearing
Jan 02, 2018

The Influence of the Check on the Use of Angular Contact Ball Bearing


The shaft parts of the machine, especially the main shaft, are generally integrated with thrust ball bearings and rotate at a high speed, sometimes producing high heat.If not promptly eliminate, this phenomenon will cause the angular contact ball bearing overheating, and makes the corresponding parts temperature rise and thermal deformation will occur, serious when they make the main shaft and tail frame range is high, which not only affect the accuracy and machining accuracy of machine tool itself, but also the bearing burn out.

The rated fatigue life refers to the operation of a set of bearings of the same type under the same conditions, of which 90% of the angular contact ball bearings do not show the total number of revolutions caused by the rolling fatigue.At constant speed, the total operation time is used to indicate the rated fatigue life.

In the study of the life of thrust ball bearing, the fatigue life should not be considered, but the performance of the bearing should be considered.For example, grease lubricant life of grease lubrication bearing.Noise life, wear life and so on, according to the use of different, using the limit base of different, so, mostly preselected experience limit.

Therefore, it is difficult to know the real cause of injury of the contact ball bearing injury.But, if you know the use of thrust ball bearing machinery, conditions of use, bearing the surrounding structure, to get hold of before and after the accident, combined with several damage status and causes of bearing, can prevent the similar accident happen again.

Whether the Angle contact ball bearing can be used is the determination of bearing damage degree, mechanical performance, importance, operation condition and the time of the next overhaul.New thrust ball bearings must be replaced if any of the following defects cannot be used.Any of the inner circle, outer ring, rolling body, and any of the retaining shelves have cracks or gaps.

Wear failure is one of the common failure modes of various kinds of bearings, which can be divided into the most common abrasive wear and adhesion wear.

1. Oil film resistance diagnosis technology

Features: the same criteria can be used for different working conditions.Poor diagnosis of surface peeling, indentation, crack and so on.

Application scope: applicable to the appearance of the rotating shaft.

2. Vibration diagnosis technology

Characteristics: vibration diagnosis technology is widely used;Online monitoring can be achieved;Diagnosis is fast, diagnostic theory is mature.

Application range: especially suitable for the failure monitoring of angular contact ball bearings in rotating machinery.

3. Iron spectrum diagnosis technology

Features: the machine does not need to disintegrate;Low investment, good effect;The early fatigue failure of the oil-free bearing can be found;Study on wear mechanism.

Application range: the fault diagnosis of contact ball bearing with lubrication of lubricating oil is applicable, and it is difficult to lubricate bearings with grease.

4. Temperature diagnosis technology

Features: simple diagnosis;Good effect on bearing burn judgment.

Application range: simple and conventional diagnosis of bearing in machine.  

5. Optical fiber monitoring and diagnosis technology

Characteristics: high sensitivity of optical fiber displacement sensor;The signal-to-noise ratio is improved by extracting the signal directly from the non-oil bearing surface.It can directly reflect the manufacturing quality, surface abrasion degree, load, lubrication and clearance of angular contact ball bearings.

Application range: the machine that can be installed in the bearing seat of the sensor. 

6. Acoustic emission diagnosis technology

Features: quick diagnosis and simple diagnosis;On-line monitoring.

Application scope: new technology developed in recent years has been used less in bearing condition monitoring.

When taking the oil bearing without oil directly, wash the sweat away from your hands thoroughly, and then apply it with high quality mineral oil, especially during the rainy season and summer.Under some special operating conditions, angular contact ball bearings can obtain longer life than traditional calculation, especially under light load.These special operating conditions are when the rolling surfaces (orbits and rolling pieces) are effectively separated by a lubricating film and limiting the surface damage that can be caused by pollutants.In fact, under ideal conditions, so-called permanent bearing life is possible

Strong stamping is not allowed, and the bearing is not allowed to be hit directly with the hammer, and it is not allowed to pass the pressure through the rolling body.

Angular contact ball bearing a rotation, inner ring and outer ring raceway surface, with rolling body is rolling contact, as the dark side, thus orbit trajectory are attached to the raceway surface does not belong to abnormal, which can be learned that load conditions, so when removing oilless bearing, please keep close attention and observation on the surface of the raceway.