大型多支承变刚度回转窑支承载荷分配问题(英文)

Research on supporting load distribution of large-scale rotary kiln with multi-support and variable-stiffness

回转窑是冶金、水泥、耐火材料生产中的核心设备,是一种重载、大扭矩、多支点、静不定运行系统,由于其载荷和刚度分布复杂、各支承存在偏移,作用在它托轮上的支承载荷分配严重不均。本文针对回转窑载荷和刚度分布的特点,建立支承载荷求解的力学模型和线性方程组,导出支承载荷分配与支承偏差的关系式;用该方法对现场回转窑进行计算,得出该窑支承载荷分配的线性公式和一些分析结论,为生产中回转窑的状态分析、优化调控提供依据。

Kiln are the key equipment in the production of metallurgy, cement and material of fire-fast. It is the statically indeterminate system with over load, large torque and multi-support. Because of the complexity of load and stiffness distribution of the rotary kiln, the deflection of supporting center, the supporting load distribution will become seriously non-uniform. To the characters of load and stiffness distribution of the rotary kiln, the mechanical model and equation group are established, which are used to solve the variable-stiffness beam upon complex load for kiln. The relation between the supporting load distribution and deflection is derived. Accordingly, the liner formulas for calculating the support force of the support wheels fixing on the rotate kiln are obtained from the practical calculation of rotary kilns, and some useful analysis conclusions are obtained. This will provide helpful guide to condition analysis and optimization control of rotary kiln.