Life expectancy of fatigue operation of outer spherical bearing housing

The influence of the metallurgical quality of the outer spherical bearing material is the main factor in the early failure of the rolling bearing. With the advancement of metallurgical technology (such as bearing steel, vacuum degassing, etc.), the quality of raw materials has been improved. The proportion of raw material quality factors in bearing failure analysis has dropped significantly, but it is still one of the main factors of bearing failure. The choice of proper or not is still a bearing failure analysis that must be considered.

    The main task of the failure analysis of the outer spherical bearing housing is based on a large number of background materials, data and failure mode analysis to find out the main factors causing bearing failure. In order to achieve targeted improvement, the service life of the bearing is extended to avoid bearing protrusion. The early event of the incident failed.
The fatigue life of the outer spherical bearing seat calculated according to the prescribed formula and calculation rules is calculated as the fatigue life. The calculated total rotation value is defined as the total rotation value when the inner ring or the shaft ring rotates (when the outer ring or the seat ring is fixed).
According to the specified standard test method, the rolling bearing fatigue life test procedure, in the performance of the test machine can meet the requirements of a method, the sampling fatigue life test of a batch of bearings, the actual test life obtained from the test data processing It is the fatigue test life of the batch of outer spherical bearing housings represented by the tested bearings.
The rolling bearing fatigue life test is an intensive fatigue life test method that uses sufficient lubrication to minimize the wear factor of the rolling bearing and uses the enhanced load and speed to highlight the bearing fatigue factor.
The calculation method of the fatigue life of the outer spherical bearing housing and the fatigue life test are complementary, and the results obtained by the two have sufficient correspondence.
However, in reality, for each specific use case, a sufficient number of bearings are taken for life testing to verify that the selected bearing is suitable, which is very economical, time-consuming and labor-intensive, so The test method for the life of a spherical bearing is only used when it is necessary or important. In most cases, the standard life calculation method is used to estimate the service life of the bearing, which has a sufficient degree of dependence.