Dynamic analysis of ball screw in lifting conveyor
                                                              GUO Yihang, SUN Dongming, QIN Yeqiu, WANG Bin
              (Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650500, China)

Abstract: Aiming at the problem that the ball screw of the lifting conveyor was susceptible to damage when subjected to radial load,the force of the ball screw during the working process of the lifting conveyor and the cause of the radial load were studied.The force of the ball screw in the process of starting,conveying and braking of the lifting conveyor was obtained,and two methods of increasing the guide rod and adding four hydraulic cylinders on both sides of the lifting conveyor frame to reduce the radial load of the ball screw were proposed.The dynamic analysis of Adams was used to discuss the variation of the ball screw force and the radial load of the ball screw during the starting, transporting and braking of the lifting conveyor under different improved schemes. The results indicate that the proposed two methods of reducing the radial load of the ball screw can effectively reduce the radial load on the ball screw,the damage caused by the radial load on the ball screw is reduced,the service life of the ball screw is increased,and the conveying efficiency of the lifting conveyor is improved.

Key words: lifting conveyor ;force analysis of ball screw;radial load;structural improvement; simulation