Motion stability analysis of cage of rolling bearing under the variable-speed condition

The fluctuation of the cage rotating speed will lead to strong instability movement rolling bearing, which seriously affect operation performance and service life bearing. In this paper, a nonlinear dynamic model cylindrical roller bearing is established considering contact relationship between rollers, raceways, cage. variation motion characteristics its internal mechanism under uniform, acceleration, deceleration, harmonic are discussed, respectively. effects angular amplitude, period on stability analyzed. results show unstable mainly happens at initial stage acceleration process later deceleration process. Appropriate increases in can help improve movement, but excessive fluctuations should be avoided adversely guiding force outer raceway plays an important role variable-speed conditions. paper provide theoretical basis for design failure analysis