Analysis And Study On The Effect Of New Type Roller Cage Shoes On The Horizontal Dynamic Characteristics Of The Cage

The rigid trackway-cage hoisting system plays a particularly important role in coal mine production.The roller cage shoes are installed on the cage and cooperate with the trackway to play the role of guiding and buffering,which plays an important role in the smooth operation of the cage.Aiming at the problems of the traditional roller cage shoe,such as easy failure of buffer structure and poor cushioning performance,a new type of roller cage shoe is proposed in this paper,and its influence on the horizontal dynamic characteristics of the cage operation is analyzed and studied.It is of great academic significance and practical value for the research and development of the new type of roller cage shoe and for the safe operation of the cage hoisting system.In order to study the difference between the the new roller cage shoe and the disc spring cage shoe on the horizontal dynamic characteristics of the cage operation,the static stiffness of the new type of roller cage shoe was analyzed by means of finite element simulation and experimental test,and the material parameters of each part of the new type of roller cage shoe were obtained.The relationship between dynamic stiffness and amplitude and frequency was explored through experimental test.And the Berg model was used to describe the stiffness characteristics of rubber springs.The reliability of the model was verified through experiments and simulation analysis.On the basis,the dynamic stiffness model of a new type of roller cage shoe and a 2DOFs cage horizontal vibration model of the cage which can quickly and intuitively analyze the influence of the trackway and cage shoe on the cage vibration are established.The difference of cushioned performance between the new roller cage shoe and the disc spring roller cage shoe under different trackway defects excitation is analyzed,and the superiority of the new type of roller cage shoe in improving the horizontal stability of cage is compared and verified.At the same time,the serious defects of the trackway are analyzed.Based on the parallelism of the 2 DOFs vibration mode in the horizontal direction,the dynamic model of the cage horizontal vibration coupling system with new type of roller cage shoes is established,and the characteristics of cage horizontal vibration under the stimulation of seriously damaging trackway defects are analyzed by using ADAMS rigid and flexible coupling module,and the analysis results show that the cage operation is relatively stable.Then,the control variable method is used to study and analyze the influence of the new type of rubber spring parameters on the system,and it is obtained that the order of the influence of each parameter on the system from the largest to the smallest is the friction unit-maximum friction force,viscoelastic single-stiffness,main spring stiffness and viscous damping.Finally,a complete set of experimental scheme is proposed to verify the correctness of the 2 DOFs horizontal vibration model of the cage,which provides theoretical basis and technical support for the research and development of the new type of roller cage shoe.