The IMPact And Torsional Vibration’s Calculation Of Orlling Mill Gear Transmission System

Rolling mill main drive system is composed of some inertial element and the " Quality spring system stability" composed by elastic element. a main transmission system torsional vibration does not occur, but when production load disturbance (such as biting steel, cast steel, start, speeding and so on), the system will generate the situation of unstable transient torsional vibration, the accident is frequent, so the study of the situation of mill active system torsional vibration can be better understanding of its essence, providing the theory support to the main transmission system design to reduce torsional vibration level.Rolling mill of reducer is one of the key equipment in main drive system, its performance directly affects the reliability of the whole system, in the mill process, gear system is also associated with the disturbance of initiation, transmission, bite steel and cast steel load, inevitably lead to the gear vibration and shock, not only affect the dynamic characteristics of self drive, but also cause the vibration of the main drive system. So the study of rolling mill gear dynamic characteristics is of great significance. From the kietic analysis and finite element calculation point of view, this text analyses rolling mill IMPact Torsional Vibration and dynamic strength of helicalgear reducer. of the main drive systemBased on continuous elastic collision theory and the system dynamics as the support, this text treat a factory’s a1580F2mill as research object, first using ANSYS/LS-DYNA display dynamic analysis software and LS-PREPOST post processor to set up the mill reducer gear3D analysis model, calculating the dynamic stress under the excitation of shock load and the situation of deformation, the comprehensive coMParison in different common disturbance conditions of start speed, start-up time and external load steel ect, helical gear system bearing capacity and dynamic characteristics of helical gear; be in shock excitation dynamics,as the design reference of reducer transmission system.Secondly according to impact torsional vibration of the rolling mill caused by the load disturbance,using the lumped parameter method and influence coefficient method to establish two kinds of main drive system of rolling mill branch dynamics model and the torsional vibration mathematical model, by using the Runge-Kutta numerical calculation method of slope in the software MATLAB,taking numerical simulation and analysis on load and step loading biting inpact process, obtained under impact loading of the shaft parts dynamic torque response curve and torque amplification coefficient TAF, judging when torsional vibration occurring, the main drive system of the maximum dynamic load, and research and analysis the affection of the different biting time on the main transmission system dynamic impact properties, derived inhibitory impact torsional vibration method...