Research On Key Issues Of Guiding Device In Vertical Shaft Lifting

With the rapid development of modern mine construction,it is important to ensure the safety and stability of the lifting system while increasing the speed of the lift.The guiding device in lifting the shaft is an important factor influencing the stability of the lifting vessel.Shaft steel guide and guide roller are the main components of the guiding device,studying the key problems that exist is the basis for promoting the safety and efficiency of the mine.In order to obtain the mechanical properties of the shaft steel guide and guide roller,detailed static and dynamic analysis is required and verified.This paper mainly studies the equivalent stiffness of shaft steel guide structure and the overall stiffness and dynamic response characteristics of guide roller,mainly from the following four aspects.Mainly from the following four aspects:1.Studing the three calculation models of the mine shaft steel guide structure as research contents,through theoretical calculation and ANSYS finite element simulation,the deflection characteristics of simple supported beam model,three span continuous beam model and space grid structure model under moving load are obtained.In addition,the modal analysis of the space structure is carried out.2.A three-dimensional model of the L35 roller is established.Firstly,First,the stiffness characteristics of the polyurethane rubber wheel and the stiffness curve of the combination mode of the nine disc spring are calculated,the swing arm of the guide roller be simplified as a connecting rod mechanism,and the conversion relation between the horizontal force and the axial force of the compression buffer device is obtained,and the theoretical displacement of the guide roller under the maximum level is deduced.Then the ANSYS Workbench is used to simulate the guide roller,and the law of the static equivalent stiffness with the horizontal force is obtained.Finally,the simulation results are verified by the static stiffness test bench of the guide roller.3.According to the analysis of the dynamic characteristics of the guide roller,the modal analysis of the roller is carried out using ANSYS Workbench,and the natural frequencies and vibration shapes of each order are obtained.The rigid flexible coupling dynamic model of the guide roller is established by using ANSYS and ADAMS.The defects of the shaft steel guide are divided into three categories and the lifting speed is divided into four stages.Taking the horizontal displacement as the pumping signal and taking the center mark points of the front axle of the roller swing arm as the signal output point.The time domain dynamic response characteristics of the guide roller to the defect of the steel guide under different working conditions are obtained.4.Through the ADAMS vibration analysis module,the vibration analysis of the virtual prototype model of the guide roller is carried out,and its frequency domain characteristics are obtained.Then the model is optimized by the ADAMS parameter optimization design module to get the optimal parameters are obtained.The static and dynamic characteristics of the structure of the shaft steel guide and the guide roller are obtained through the modeling and analysis of the lifting guide device of the vertical shaft.Moreover,the dynamic response characteristics of guide roller to steel guide defects under different lifting speeds are analyzed,which can provide some basis for designing and calculating high-speed and heavy loading shaft steel guide and guide roller.