Analysis on Contact of Needle Roller Bearings

The elastic contact model of two elastomers is established,the computational formula of elastic approach of needle roller bearings is derived,and the distributions of contact stress and Mises stress field are analyzed when the angle of inclination increased gradually.Moreover,the formula of critical angle of inclination is deduced for needle roller bearings when the fatigue life is reduced by 20%.The results show that,when the angle of inclination is 0.04°,the local heavy wear at one needle end appears;and when the angle of inclination is 0.07°,the needles break down.With the increase of the angle of inclination,the life of needle roller bearings will shorten significantly.