THE ANALYSIS OF INFLUENCE OF THE MATERIAL OF rolling element ON value OF CENTRIFUGAL FORCES AND LOSS ON THE FRICTION IN BEARINGS WITH STEEL AND CERAMIC BALLS

V.N. Dotsenko, S.V. Nikitin, E.А. Kononyhin

Questions of influence of a material of rolling elements in angular ball bearing on pressure in point of contact of rolling element and bearing rings are considered. For definition of a contact angle the non-stationary nonlinear volume problem of interaction of a ball and a race has been solved. Values of contact pressure for ceramic and steel rolling elements in hybrid ball-bearing are defined. It is shown that from the point of view of contact strength ceramic rolling elements with the considered size have advantages at rotary speeds more than 7000 rad/s. Specific power of a friction as a result of differential slipping of rolling elements on a race is estimated. It is shown that at low rotary speeds specific power of a friction of ceramic rolling elements on steel rings of the bearing differs from power of a friction of steel rolling elements a little, however at rotary speeds more than 7000 rad/s power of a friction of ceramic rolling elements almost twice to less than power of a friction of steel rolling elements.

Key words: a shaft bearing, the ball bearing, centrifugal force, ceramic balls, contact pressure, a friction, power of a friction.