Dynamics Analysis Of The Mutiple-point Meshing Transmission Mechanism System With Flexible Support

Dynamic problems of large basic oxygen converter are investigated in this paper.In this thesis,the dynamic response properties,parameter design criterion and structural parameters optimization design for the multiple-point meshing transmission mechanism system with flexible support are researched deeply through theoretical analysis and numerical calculation.And experimental researches are carried out in the workplace of a300-Ton Oxygen Converter,which is a typical application equipment of this system.During the blowing period of oxygen converter,the fluctuations of melten steel in the melten bath will cause vibrations of the equipment. Thus,the dynamic characters of large combined blowing converter during the blowing period are fiestly analysed.The motion differential equations for the multiple-point meshing mechanism system with flexible support are estsblished by the Lagrange formula.The analysis solutions of the dynamic torque in the main shaft and to the ground acted by the gear housing are deduced,and their amplifying coefficients or varying range are also given.The influence of equivalent torsional stiffness ratio of the flexible support to the main shaft to the peak value of the system’s dynamic torque is discussed. And the influences of design parameters to the system’s natural frequencies and dynamic torque are studied deeply through numerical calculation.Dynamic responses of typal dynamic load during the starting and stopping period are analysed in this paper.The results show that the rigidity of the torsionsal bar has a notable influence on dynamic load of the system.Based on this,by constructing mathematical model of muti-object optimization problem,optimization of the diameter of the torsional bar is proceeded.The satisfactory results prove that this optimization method,for the chionce of the diameter of the torsional bar in the flexible transmission,is of general reference.Finally, the suspension of converter titling agencies torsion bar is mechanical modeled in this paper. And the finite element of the torsion bar is analysed in these two conditions of normal work and accident situation these two conditions. The distribution of the torsion bar’s respectively the displacement and stress is made to find dangerous parts. And strength and stiffness of the dangerous parts are carried out and checked.