Research On Dynamic Numerical Simulation Of Support System Of Large Rotary Kiln

Rotary kiln is composed of gas flow,fuel combustion,energy transfer and material movement.It is widely used in rotary cylinder equipment in metallurgy,building materials,chemical industry and other industries.The technical performance of the rotary kiln and the strength of its supporting system largely determine the quality of its products.Therefore,studying the mechanical behavior of the rotary kiln support system has extremely important engineering and economic significance.Traditional mechanical methods calculate that the main components of the rotary kiln's support system are difficult to accurately reflect its mechanical behavior.Therefore,a combination of traditional mechanics and numerical simulation is used to study the mechanical characteristics of the rotary kiln support system.The support system of the rotary kiln is a key component that carries the rotary part of the rotary kiln.The failure of the support system will lead to the paralysis of the entire rotary kiln working system,resulting in huge economic losses and many potential safety hazards.The main components of the support system are calculated and analyzed through the field measurement data combined with the mathematical model established by the finite element,and the cause of the failure of the main components and the main location of the damage are found.Extremely important role.The rollers and tugs of the rotary kiln are the core components of the support system and play the role of transmitting the rotary force to the cylinder.The main reasons for the damage of the rolling ring and tug are the surface broken and falling blocks caused by the contact of the structural surface,the fatigue cracking of the rolling ring,the wear of the idler shaft hole,the fatigue fracture of the idler shaft,etc.The damage of these parts can cause the support system Failure,and thus will cause various mechanical failures and safety accidents.This article aims at these problems that may exist in the operation of the rotary kiln,starting from the contact force of the rolling ring and the supporting wheel,the contact and force of the supporting wheel and the tug shaft,the contact and the force of the rotary kiln barrel and the rolling ring,etc.Through the ANSYS finite element analysis software,the contact pressure distribution of the rotary kiln barrel and the rolling ring,the size of the contact angle,the matching form of the supporting wheel and the tug shaft The pressure distribution of the contact area of the rolling ring and the supporting wheel were systematically studied.The pressure distribution of the cylinder to the rolling ring,the best gap between the cylinder and the rolling ring,and the optimal thickness of the contact area between the cylinder and the rolling ring are obtained;the supporting roller pair is obtained based on the worst gear of the rotary kiln The contact pressure distribution of the rolling ring;and in the study of the contact between the rolling ring and the supporting wheel,the contact pressure distribution of the normal contact area of the two elastic cylinders and the cause of the damage of the rolling ring and the supporting wheel were studied,and the prevention of damage was proposed And methods to extend the service life of components.The stress distribution of the cylinder under normal operation and axis offset was calculated,and it was concluded that the cylinder axis offset had a much greater effect on the stress and strain of the cylinder than the materials and kiln lining.In this paper,the contact mathematical model of the rotary kiln support system is established.The working conditions and failure forms of the rotary kiln support components observed on site are compared with the models established in this paper.The finite element model of the body is reasonable,and the analysis results obtained can truly reflect the distribution and deformation of the stress and strain of each component.