Experimental analysis of Axial load internal circulation ball screw pair of friction torque and the impact

According to the working principle of the ball in and out of the race in inner circulation and external loop, analyzed under the action of axial force of the ball in and out of the influence of the raceway for the ball screw friction resistance, due to ball in rail friction drag is small, that the inner loop no loss as external loop ball friction energy in the circulation pipe, friction torque variation of the ball in and out is small. Experimental results show that the inner loop of the ball screw's friction torque increases with the increase of rotational speed, but the amount of friction torque fluctuation is small, under the screw speed, the axial force has certain influence for inner loop ball screw's friction torque fluctuation and ball impact, but under the relatively high speed is not obvious of on the two.