Additive of cylindrical roller bearing load impact on service life

Cylindrical roller bearings with clearance, under the effect of load, the relative movement inside and outside the circle is going to produce this will reduce the stiffness of cylindrical roller bearing, cause the radial and axial vibration of shaft, working accuracy of the machine and life be affected. In order to reduce the vibration, for high precision and high speed machinery, when installing a cylindrical roller bearing often adopt the method of preloaded, namely when installed in advance for cylindrical roller bearing a certain load ( Radial or axial) , eliminate the original clearance, and make cylindrical roller bearing and produce elastic deformation on inner and outer body, thus preventing work relative movement between inside and outside the circle. 1, cleanliness, seriously affecting bearing vibration level, especially the vibration of the high frequency band. High cleanliness of low vibration velocity values 2, its influence on noise. Of TIMKEN bearing grease in the dust on the noise test, the influence of proof dust, the more the greater the noise. 3, the impact on the lubrication performance of TIMKEN bearing cleanliness, not only affect the formation of lubricating film, still can cause the deterioration of the grease and accelerate its ageing, a load for the purpose of the spindle, additive additive load cylindrical roller bearing, ball and the raceway eliminated the original clearance and formed certain elastic deformation, when under external load, have certain rigidity, cylindrical roller bearing has to load with the outside world force in the opposite direction of cylindrical roller bearing installation, not due to external load and make the ball and the raceway generation gap, so as to improve the spindle rotation accuracy, strengthening the stiffness of the spindle and increase the service life, and can also reduce the noise. Second, the principle of additive load prediction of loading, general is according to the size of the working load size, spindle rotating accuracy and speed. 1, the spindle load is small, high rotating accuracy and low speed, desirable larger additive load. 2, large working load, high speed, due to easy to heat expansion, YiQu smaller additive loads.