Angular contact ball bearing effect on the use of the check

Machine shaft parts, especially the spindle, the general thrust ball bearings are assembled into one, and a high speed of rotation, and sometimes it will produce a very high heat. This phenomenon if not removed, will cause angular contact ball bearings overheating, and to the corresponding parts of the machine to produce thermal deformation temperature, causes severe spindle and tailstock is not high, which not only affects the accuracy and precision machine itself and bearing will burn.

Rating fatigue life, refers to a group of the same type of bearing, operating under the same conditions, 90% of the angular contact ball bearings from falling off the total number of revolutions caused by the rolling fatigue occurs. At constant speed, multi-rated fatigue life is represented with a total running time.

In examining the thrust ball bearing life, not only consider the fatigue life, but also according to the bearing should have the performance, integrated use of several limits to consider. For example, greased bearing grease life. Noise life, abrasion life, etc., depending on the purpose, use the reference limits vary, therefore, most of the experience of pre-selected limits.

Therefore, only the angular contact ball bearing damage survey, it is difficult to know the real cause of injury. However, if you know the use of machinery, conditions of use, bearing thrust ball bearing structure around, to understand the situation before and after the accident, combined with state of the bearing damage, and several reasons, we can prevent similar incidents from recurring.

Angular contact ball bearings are available in judgment, mainly on account of the extent of bearing damage, mechanical properties, the importance of operating conditions to be determined during the next overhaul. If you have the following defects can no longer use, must be replaced with new thrust ball bearings. Inner ring, outer ring, rolling elements of any cracks or gaps on the holder.

Wear failure is one of the types of bearings common failure mode, press the wear is usually divided into the most common form of abrasive wear and adhesive wear.

1 film resistors diagnostic techniques

    Features: different working conditions can use the same criteria. Of flaking, abnormal diagnostic results indentation, cracks worse.

    Applications: suitable for rotary axes exposed occasions.

2 vibration diagnostic techniques

    Features: Vibration diagnostic technique widely used; enables online monitoring; diagnosis faster diagnosis theory has matured.

    Applications: especially suitable for rotating machinery angular contact ball bearing fault monitoring.

3 Ferrography diagnostic techniques

    Features: Machine without disintegration; low investment, good effect; able to find oil-bearing early fatigue failure; mechanism do wear.

    Applications: suitable for fault diagnosis lubricating angular contact ball bearings with grease lubricated bearings for the more difficult.

4. Temperature diagnostic techniques

    Features: Diagnostic simple; bearing burns better judgment.

    Applications: for simple routine diagnostic machine bearings.

5 Optical Monitoring diagnostic techniques

    Features: Fiber optic displacement sensor with high sensitivity; never direct signal to extract the oil bearing surface to improve the signal to noise ratio; may be a direct reflection of angular contact ball bearing manufacturing quality, surface wear, load, lubrication and clearance situation.

    Applications: apply to the sensor can be installed in the bearing machine.

6. Acoustic emission diagnostic techniques

    Features: diagnostic fast, simple; online monitoring.

    Applications: In recent years the development of new technologies, in bearing condition monitoring applications less.

    Direct hand when handling oil-bearing, to fully wash hands sweat, and coated with high-quality mineral oil before operation, during the rainy season and summer with particular attention to rust. In some special operating conditions, angular contact ball bearings can be obtained in a longer life of traditional computing, in particular under light-load conditions. These special operating conditions is that when the rolling surface (track and rolling elements) are effectively separated and limit pollutants may cause damage to the surface of a lubricant film. In fact, under ideal conditions, the so-called permanent bearing life is possible

    Does not allow a strong punch, does not allow a direct hit with a hammer bearing is not allowed to pass through the rolling pressure.

A rotational angular contact ball bearings, inner and outer ring raceway surface, because the rolling contact with the rolling body is so dark surface running track, running track attached to the raceway surface is not abnormal, which can be learned load conditions, so the demolition of non-oil bearing, please pay attention and observe strict raceway running track.