Design And Analysis Of The Driven Mechanism Of Train Puller

At present, unloading system is widely used in ports,power plants and other industries,this system consists dumper and car puller.With the rapid economic development,the requirements of the unloading efficiency are also increasing.Designing reasonable drive mechanism and gear rack mechanism has important significance to improve the practicality and economy of the train puller.This paper analyzes the various obstacles may be suffer when the car puller is working,Calculated the load resistance of three kinds of working condition,which are constant speed running phase,start up phase and the braking phase,calculation the required motor power according to the resistance load,and designed two schemes which are the drive gear in the same side of the rack and the drive gear in the opposite side of the rack.Secondly,using ADAMS to analyze the gear teeth contact force rack in meshing process over time,compare the difference of the contace force between uniformly accelerated start and varying accelerated start,considering the stiffness,damping,deviation of gear rotating center and drive gear center distance influence on the load balancing,and found that the stiffness and the deviation of gear rotating have great influence on the contact force,the influence of damping on the contact force is small,the performance is better when the distance of drive gear is non-integer times pitch than integer times pitch.Finally,used ABAQUS to analyze the contact stress in gear rack meshing process and the energy consumed due to friction.Contact stress in gear rack meshing process is time-varying.The contact stress is greater when a tooth contact than two teeth contact,and Maximum stress meet the material requirements.The position of the tooth contact area,the shaft and the root of the gear teeth have greater stress.In practice these positions prone to wear and tear,failure and so on.So the simulation results have some reference value.