Cooperative optimization method for bearing position and thickness of rotary-kiln cylinder

Abstract

The invention relates to a cooperative optimization method for the bearing position and the thickness of a rotary-kiln cylinder. The cooperative optimization method is characterized by including the steps that firstly, a relationship model between the bearing position, the cylinder thickness and bearing force is obtained according to the distribution condition of loads and the rigidity of the cylinder, the constraint condition of cylinder-load balancing distribution is considered, and a cylinder-load balancing distribution optimization model is established; secondly, stress-time courses of all cross sections of the cylinder are acquired through contact finite element analysis between the cylinder and a rolling ring, the fatigue life is forecasted with the nominal stress method, a constraint is the transverse-rigid-and-longitudinal-soft design rule of the cylinder and non-exceeded cylinder-cross-section deformation, and an equal-life optimization model of all the cross sections is established; finally, the cylinder-load balancing distribution optimization program and the cylinder equal-life optimization program are continually called, the loads of the cylinder are distributed on all bearings accordingly, and the service life of all the cross sections of the cylinder tends to be coincident. According to the cooperative optimization method, the potency of all parts of a rotary kiln can be fully developed, the number of kiln stopping is reduced, and the production benefits of the rotary kiln are improved.

Description

Technical field [0001] The invention belongs to the field of structural optimization of a rotary kiln, and relates to a method for synergistic optimization of the supporting position of the rotary kiln cylinder and the thickness of the cylinder. Background technique [0002] Rotary kiln is a key equipment in cement, metallurgy, chemical and other industries, and it runs continuously in high temperature, heavy load and open air environment for a long time. The cylinder is the core component of the rotary kiln, which is often up to 100 meters long and is supported by a multi-stage supporting system. The cylinder part supported by the support system is called the gear section, the cylinder part without the support system is called the cylinder section, and the connection area between the gear section and the cylinder section is called the transition section. Field investigations and related studies have shown that: in traditional design, the supporting position of the rotary kiln s...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems in the traditional design of the rotary kiln, such as uneven support and load at various places, and great differences in the service life of the cylinders of each section, the present invention discloses a method for synergistic optimization of the support position of the rotary kiln cylinder and the thickness of the cylinder, which is characterized in that: First, according to the cylinder load and stiffness distribution, considering the constraints of the balanced load distribution of the cylinder, an optimization model for the balanced load distribution of the rotary kiln cylinder is established; then the equivalent stress-time history of each section of the cylinder is obtained by the finite element method, based on The nominal stress method is used to predict the fatigue life of each section of the cylinder, and considering the principle of transverse rigidity and longitudinal flexibility in the design of the cylinder, an equal-life optimization model of each section of the cylinder is established; finally, through the collaborative optimization strategy, the optimization program of the cylinder load balance distribution and Cylinder equal life optimization program to realize the optimization of cylinder support position and cylinder thickness

Images