Based on the MB fractal theory, the contact thermal resistance of the raceway contact surface was determined, and a finite element model for thermal analysis of high-speed ball screw pairs considering contact thermal resistance was established. The temperature rise characteristics of ball screw pairs under different contact thermal resistances were analyzed through simulation calculations. The results indicate that the highest temperature of the screw is concentrated at the joint between the front bearing and the ball raceway, while the peak temperature of the ball and nut is concentrated in the middle of the raceway. The change in contact resistance has a significant impact on the steady-state temperature of the ball and nut. As the contact resistance increases, the steady-state temperatures of the ball and nut both increase significantly. The above work provides a theoretical basis for studying the temperature rise control and cooling lubrication methods of high-speed ball screws.
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