"Extension of KOYO bearing life expectancy" approach

Source: China Bearing Network Time: 2014-10-17

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(1) KOYO bearing life problem is widely used in ball bearings in car gearboxes; the original life expectancy is shorter than the extra life calculated according to the standard method juice; the performance is early fatigue and high noise. The life of bearings in other parts of the car is higher than the extra life.
(2) Analysis of the cause of KOYO bearing failure After reviewing the quality of the gearbox is excellent; the bearing device cooperates normally; smooth and plentiful; the suspected smooth oil does not enter the upper part of the bearing is removed. But all the inner ring channel has pressure Traces or craters or surface cracking type fatigue; not subsurface detachment damage; do not cause such an appearance when the oil is abundant.
It was found that the outer surface of the channel was mixed with metal particles such as iron, copper, aluminum and zinc, and non-metal scraps such as rubber, sand and plastic.
Discrimination: These foreign objects and the indentations formed by them damage the integrity of the oil film; it is verified by the fatigue of the early failure of KOYO bearings; the above discrimination is correct.
(3) KOYO bearing failure solution has adopted the increase of steel ball type, special heat treatment type or even double row ball type and vacuum remelting steel bearing; the value is more and more valuable; and the life progress is not large.
Finally, it was developed into a "sealed hygienic" type bearing; it has achieved great success. This kind of bearing is a special rubber sealing ring on each side of the original specification bearing; the characteristic is that the sealing ring is mainly used to avoid dirt. Intrusion into the bearing; not the same as the bearing seal that is primarily intended to adhere to grease.
(4) The role and the development of the rough seal sanitary bearing in the live simulation test shows that the test life is more than 7 times higher than the original bearing of the same scale standard; even the bearing with smaller scale standard; The number has also improved by more than 4 times.
This kind of bearing is cheaper; it promises to use high quality smooth grease; working noise. The ash is extended to 25 standards; this type of bearing is used in various gearboxes of 25 cars and trucks to replace the original The use of a variety of more expensive and the use of short life, often difficult problems of the bearing.
Sealed sanitary short cylindrical roller bearings and tapered roller bearings; they have been used effectively in various rolling equipment; bearings in this way continue to be used in other fields of use.

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