THE EFFECT OF THE RADIAL CLEARANCES ON THE DYNAMIC PROCESSES IN ROLLING BEARINGS

Abstract

A method for calculating the parameters of shock pulses generated in rolling bearings due to the presence of radial clearance in them is proposed. The method is a further development of theoretical research in the scientific direction of vibration-pulse diagnostics in relation to the operational assessment of the technical condition of bearing units as components of the gear drive mechanism, which largely determine the drive resource as a whole. The calculation is based on the consideration of the precession movement of the bearing axis, which it makes during the rotation of its shaft, and the theory of shock interaction of elastic bodies by G. Hertz. The mechanism of occurrence of shock pulses has been studied with an additional introduction to the calculation of the radial force acting on the shaft. It is shown that wear, which causes an increase in the working radial clearance between the races and the rolling bodies in the bearing, increases the speed and amplitude of the impact interaction of the inner ring with the rolling bodies. An example of calculating the parameters of shock pulses in ball radial single-row bearings of the 307 series is given. Conclusions are made about the prospects of using the developed method for diagnostics and forecasting the remaining life of bearings of transmission units of mobile machines.