Full Suspension Converter Tilting Moments And Key Power Transmission Components Finite Element Analysis

Tilting device is one of the most important equipments for achieving converter steelmaking production. It is characterized by big tilting torque, big reduction ratio, frequent braking and big tolerance of dynamic load. Convertor tilting device works in the poor environment of high temperature and much slag and dust, so its reliability and life have an important influence on the safety of the whole convertor equipment.1#full mounted converter tilting device of Hangzhou Iron and Steel Group Company is taken as an object. Through field investigation analysis and computer simulation, this thesis analyzes tilting torque of convertor device and draws its tilting torque curve. This thesis analyzes four meshing transmission of convertor tilting device. In order to improve the overall performance and service life of tilting device, the fatigue strength and life of tilting device gear is predicted. This thesis provides the theoretical basis for convertor steelmaking safety production. The main contents in the thesis are as follows:The thesis systematically analyzes the structure of full mounted converter tilting device and working process. Basing on this, this thesis calculates the tiling torque and moment of inertia of full mounted coverter; Using Matlab as the tool to program tilting torque curve, this thesis analyzes torque curve in details, probes into the characteristics and application of convertor torque curve, analyzes the vibration reason of convertor tilting device and also provides its restraining measures.Applying Pro/E and Ansys Workbench sofewares, this thesis makes the finite element analysis of gear reducer of tilting device’s transmission system. This thesis studies the stress and contact displacement situation of all the gear parts. And the result demonstrates that the maximum stress of gear is on the root. The gear root is easy to fatigue failure and the gear’s contact displacement is small; Contact stress is bigger when the single gear meshes and reaches its peak near to root. And contact stress is smaller far away from pitch line. This is also why pitting usually occurs at the parts that are close to the pitch line of root.Applying Ansys12.1, the gear contact fatigue strength is analyzed and through Workbench, its life fatigue damage figure and fatigue sensitive curve are got. The result demonstrates that: gear contact stress is less than allowable stress and contact fatigue strength. And basing on the theoretic analysis of element’s reliability, the object gear’s reliability is calculated to be99.89%. In addition, gear shaft fracture occurs before gear fatigue damage when gear meshes with gear shaft. Its fatigue strength is enhanced by increasing the radius of gear shaft in order to achieve that the tilting device operates safely.