Date: 2013-08-20

Four factors operating failure of spherical roller bearing

Wear failure means relative to the surface of sliding friction causes wear of its surface constantly arising out of failure. Spherical roller bearing parts caused by wear damage gradually, and eventually lead to loss of precision bearing size and other related issues. Wear can affect the shape change, increased clearance and surface morphology changes may affect the lubricants or lubrication function caused by pollution reaches a certain level and make it a complete loss, so that the loss of running accuracy of the bearing and does not operate properly. Wear failure is one of the common failure modes of all kinds of bearings, worn forms can generally be classified into the most common abrasive and adhesive wear of wear.
1, the impact on the life expectancy of bearings
Bearing the influence of cleanliness on spherical roller bearing life considerably, bearing who conducted a special test, is the difference between the results for several or even dozens of times more than double. Bearing cleaning more, longer life and other people's experiments show that different cleanliness of the lubricant to the ball bearing life considerably. Therefore, improve the cleanliness of the lubricant can extend the life of the bearing, in addition, lubricant with dirt particles control 10um, bearing life into several times growth.
2, the effect of noise and vibration
(1) effect on the vibration of bearing Test Center test results indicate that the cleanliness seriously affect bearing vibration levels, especially high-frequency vibrations more visible. Clean bearing vibration velocity values for high low, especially in the high frequency band.
(2) on the effect of noise on spherical roller bearing grease dust effects on noise test, prove that dust as much noise as possible.
3, effects on lubrication performance
Bearing cleanliness declined, not only affect the lubricant film formation, also cause spoilage and accelerate their ageing of grease, thus affecting the grease lubrication performance.
Bearing failure due to defects and overload two major factors. When the applied load exceeds the ultimate strength of the material part fracture called the overload fracture. Overload is mainly hosts sudden failure or improper installation. Micro-cracks, shrinkage of the sliding bearing, the overheated bubble, big foreign bodies, organizations and local defects such as burn in shock overload or high vibration is also prone to defects caused by fracture, break called defects. It should be noted that spherical roller bearings in the manufacturing process, raw materials into the plant a re-inspection, forging and heat treatment quality control, process control through the instrument correctly interpreting the defect exists, control must be strengthened in the future. In General, however, usually appear most of fracture failure overload failure of the bearing.

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