Bearing life is basically divided into fatigue life, life, wear life, the failure life.
A fatigue life: bearing the main moving parts of the material reached its limit, resulting in a cumulative time beforethe bearing failure.
Rated dynamic load: the life expectancy of 10,000 rpm, the bearings can withstand the load.
The equivalent dynamic load: refers to the actual load bearing in accordance with the operating conditions to determine the dynamic load to convert the assumed load.
Life: the above-mentioned three kinds of life refers to the formulation, in theory, it refers to the fatigue life ofbearings, bearing wear life performance under normal use conditions, the condition is not normal, the manufacture of nodefect, on behalf of the failure life .
3 wear life: bearing due to normal wear, the clearance increases the cumulative working time before the specified limits.Today's bearing industry level, the wear life of> fatigue life, but in fact traction motors on the contrary.
Failure life: Bearing failure is the loss of the ability to work before the accumulated work time.
And bearing lubrication and bearing life has anything to do with it, take a look at the purpose of bearing lubrication everyone know:
Bearing lubrication purposes:
(1) to extend the fatigue life.
The rolling bearing fatigue life in the rotation, the rolling contact surface lubrication, will be extended. This is thegreatest advantage of lubricating bearings, you can increase the fatigue life, extend bearing life.
(2) reduce friction and friction loss.
Constitute the bearing rings, rolling element and to maintain contact with each other part, to prevent the metal contact,reducing friction, wear and tear. 3 discharge of frictional heat, cooling
Cycle oil law and other oil discharge occurred by friction heat, the heat coming from the external cooling. Preventbearing overheating and to prevent the lubricant itself aging.
(4) Other
Lubricated bearings have the effect of foreign body can only within the bearing, or to prevent the bearings rust and corrosion.
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