圆锥破碎机结构性能参数优化设计

发布时间：2019-04-19 07:13

【摘要】：圆锥破碎机是选矿厂的大型设备之一,它不仅在选矿中起着重要的作用,而且在冶金矿山工业和建筑建材行业中得到了广泛的应用。近年来,随着“多碎少磨”理论的提出和原矿量的增加,现有的圆锥破碎机已不能完全满足社会生产的需求。因此本文对圆锥破碎机的结构参数和性能参数进行优化计算,提高了圆锥破碎机的工作性能和生产率,改善了破碎产品质量。基于层压破碎理论,本文对圆锥破碎机的工作机理进行了深入的研究。以散体物料运动学特性为依据,分析了散体物料在破碎腔中三种运动状态,以自由落体运动轨迹通过破碎腔的临界速度为前提,对破碎腔进行了分层划分,并利用面积法,得到了各破碎层的实际压缩比。基于固定质量原理,通过研究破碎腔中散体物料的运动轨迹和对破碎腔的分层划分,建立了堵塞层处物料填充度与压缩比之间的关系,改进了圆锥破碎机生产率模型,提高了生产率模型的计算精度,并结合某型号圆锥破碎机验证了模型的可行性和可靠性。基于总体平衡模型,建立了选择函数模型和破碎函数模型。通过岩石压力机模拟层压破碎实验,对实验数据的进行分析处理,得到了相应的选择函数和破碎函数,实现了对破碎产品的粒度分布情况的预测和控制。本文以破碎机生产率为主要目标,破碎产品粒度分布为非线性约束条件,建立了圆锥破碎机多目标优化模型。研究了四个设计变量对生产率和破碎产品粒度分布的影响,通过编程优化,在保证产品质量的前提下,提高了破碎机的生产率。
[Abstract]:Cone crusher is one of the large equipment in concentrator. It not only plays an important role in mineral processing, but also is widely used in metallurgical mine industry and building material industry. In recent years, with the introduction of the theory of "multi-crushing and less grinding" and the increase of ore volume, the existing cone crushers can no longer fully meet the needs of social production. Therefore, the structure parameters and performance parameters of the cone crusher are optimized and calculated in this paper. The working performance and productivity of the cone crusher are improved, and the quality of the crusher is improved. Based on the theory of laminate crushing, the working mechanism of cone crusher is deeply studied in this paper. Based on the kinematic characteristics of bulk materials, three kinds of motion states of bulk materials in the crushing chamber are analyzed. On the premise of the critical velocity of the free falling body moving through the broken cavity, the broken cavities are divided into layers, and the area method is used. The actual compression ratios of each broken layer are obtained. Based on the principle of fixed mass, the relationship between material filling degree and compression ratio in the clogging layer is established by studying the movement trajectory of bulk material in the crushing chamber and the delamination of the crushing cavity, and the productivity model of the cone crusher is improved. The calculation precision of productivity model is improved, and the feasibility and reliability of the model are verified by a cone crusher. Based on the general equilibrium model, the selection function model and the breaking function model are established. Through the rock press simulation laminar crushing experiment, the experimental data are analyzed and processed, the corresponding selection function and crushing function are obtained, and the prediction and control of the particle size distribution of the broken product is realized. In this paper, the multi-objective optimization model of cone crusher is established with the productivity of crusher as the main objective and the particle size distribution of crusher as the nonlinear constraint condition. The effects of four design variables on productivity and particle size distribution of crushing products are studied. Through programming optimization, the productivity of crusher is improved on the premise of ensuring product quality.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD451

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