Dynamic Simulation And Fatigue Analysis Of Slewing Bearing On Blast Furnace Distributor

The rotary distributor of blast furnace is an important bearing component connecting the gear of the blast furnace and the rotary sleeve of the trunn.the operation is completed by the joint drive of the motor and the hydraulic cylinder.The two driving modes respectively control the rotation of the rotary distributor's chute and the up and down tilting of the chute,so as to ensure the different distribution forms required by the blast furnace ironmaking.The upper slewing bearing is one of the indispensable parts of the blast furnace rotary feeder.The type of the upper slewing bearing in the blast furnace studied in this paper is the single row cross roller slewing bearing,which has the characteristics of strong bearing capacity and can bear loads in different directions.It is suitable for working in high temperature and heavy load for a long time.Because the upper slewing bearing is installed at the throat of the blast furnace,it is the only way for materials to pass through.Once the failure occurs,it will cause immediate production stop,maintenance and disassembly are extremely difficult.It is very necessary to prevent and find the cause of failure in advance.Rotary bearing in the blast furnace feeder rotating cloth compared with the rotary bearing failure reason is more complex,in this paper some iron and steel group's iron single row cross roller slewing bearing dynamics analysis and strength check,combined with the intensity analysis of the results are analyzed in life calculation,got the conclusion of some reference significance and use value,The research contents are as follows:1 Use the drawings provided by the manufacturer to carry out 3D modeling with Solid Works,assemble the assembly into the dynamic analysis software,and properly simplify the model to save computational resources for the subsequent dynamic analysis of the virtual prototype.2 The 3D model established by 3D software was transferred into ADAMS in Parasolid mode,the material attributes of each component were input,the constraint type was determined based on the actual operation of upper slewing ring,the dynamics model of virtual prototype of upper slewing ring was established,and the kinematics and dynamics equations used in ADAMS in the paper were listed.An appropriate solver was selected to solve the model.In order to ensure the accuracy of operation,the rollers were replaced with flexible bodies,and the constrained model was packaged and imported into the finite element software to prepare for the next flexible processing.3 The roller of the upper slewing bearing is established through modal analysis using ABAQUS,and the corresponding rigid parts are replaced in ADAMS to generate the rigid-flexible coupling model.The contact force between the roller deformation and the inner and outer ring of the slewing bearing is obtained.4 Considering that the reason of roller failure is that the actual axis of the slewing bearing deviates from the ideal geometric axis of the slewing bearing,virtual prototype simulation is carried out with this as the research parameter,and the mechanical results obtained from dynamics are imported into ANSYS for strength analysis.Combined with the results of statics,the roller life is predicted under different conditions.The simulation results show that the stress and strain between the roller raceways increase with the increase of the offset load Angle,and the service life of the roller decreases sharply with the increase of the offset load Angle.There is no linear relationship between the service life and the offset load Angle of the roller.