高性能超静定特大型振动筛分技术的基础研究

In China, oversize vibrating screen is the essential mining equipment to ensure the extensive clean utilization of coal. Considering the scientific puzzles such as the high failure rate, poor reliability and low efficiency of screening, this proposed project will concentrate on the fundamental research on high-performance oversize vibrating screen with hyperstatic structure. The proposed research will mainly focus on the following topics: 1) Studying on the dynamic interaction between particles and screen surface in a high capacity screening with large screen, and establishing the screening theory of the interaction between screening process and vibration parameters in oversize vibrating screen. 2) Applying the hyperstatic theory to the design of oversize vibrating screen, and investigating the dynamic characteristics and hybrid optimization between force and shape of the exciting vibration system with hyperstatic net-beam structure, which enable the high reliability of the exciting vibration system. 3) Proposing the optimal distribution criterion for screen surface by the exploration of modular elastic screen surface, which will reduce the structure damage in screen surface during sieving. 4) Researching on the side panel of screen box of high-performance oversize vibrating screen with hyperstatic structure and overall lightweight design, and constructing the screening theory of high-performance oversize vibrating screen with hyperstatic structure. The research will enhance the reliability and reduce the fault of oversize vibrating screen, and it will improve the manufacturing level of large-scale mining machinery in Liaoning Province, and even in China. These will change the situation that China has relied on importation of large-scale vibrating screen for a long time and realize the effective and clean utilization of coal.

特大型振动筛是实现我国煤炭大规模洁净利用的关键矿山装备。本项目以特大型振动筛为研究对象，针对其筛分过程中故障率高、可靠性差、筛分效率低的科学难题，开展高性能超静定特大型振动筛分技术的基础研究。研究大筛面、大处理量筛分过程中粒群-筛面动态交互作用，建立特大型振动筛工艺与振动参数交互匹配的筛分理论；将超静定理论应用于特大型振动筛的设计，研究超静定网梁体激振系统结构动态特性及力/形混合优化方法，提高激振系统的可靠性；通过模块化弹性筛面的柔性设计研究，提出筛面最优分布准则，降低筛分过程筛面结构损伤；进行特大型超静定结构振动筛箱体结构侧板研究与整体轻量化设计，形成高性能超静定特大型振动筛分理论。研究成果对提高特大型振动筛可靠性、减少故障发生，提升辽宁乃至全国大型矿山机械制造水平，改变我国大型振动筛长期依赖进口的局面，实现煤炭的高效清洁利用具有重要意义。

特大型振动筛是实现我国煤炭大规模洁净利用的关键矿山装备。本项目以特大型振动筛为研究对象，针对其筛分过程中故障率高、可靠性差、筛分效率低的难题，围绕“特大型振动筛分过程中筛体参振质量变化规律与粒群-筛面动态交互作用机制、大跨度复杂结构梁的动力学响应机理与修改方法、弹性筛面振动模型及沿料流方向分布规律”等科学问题，开展了高性能超静定特大型振动筛分技术的基础研究，圆满地完成了研究任务，取得了如下重要进展：.(1)揭示了筛分过程中粒群-筛面动态交互作用机制，建立了特大型振动筛工艺与振动参数交互匹配的筛分理论。.(2)建立了超静定网梁体结构的横向振动模型，确定了超静定网梁体结构能量分布概貌，提出了超静定网梁体激振系统的结构动态设计方法。.(3)开发了模块化弹性筛面柔性设计技术，阐明了潮湿粒群弹性筛分过程行为与空间分布规律，揭示了多自由度刚柔耦合弹性筛分过程堵孔消除机制。.(4)提出了特大型振动筛整体结构轻量化设计策略，实现了特大型超静定结构振动筛高性能设计，建立了高性能超静定特大型振动筛的设计理论及方法。.(5)研制了高性能超静定特大型振动筛技术原型，无故障运行3000小时以上、筛分效率大于90%、节能约10%，已在我国山西焦煤、蒙东能源等应用，并出口俄罗斯、秘鲁。解决了特大型振动筛故障率高、可靠性差、筛分效率低、能耗大和使用寿命短等难题。.研究成果提升了辽宁省及我国特大型振动筛的设计研发水平和国际竞争力，为我国大型选煤厂建设提供了技术保障与装备支撑。对改变我国特大型振动筛完全依赖进口的局面，使我国特大型振动筛由跟踪仿制跨越为自主研发、国际领先，实现煤炭高效清洁利用具有重要意义。.发表论文33篇，其中SCI论文22篇(JCR一区13篇)，出版著作1部；授权中国发明专利8项、国际专利3项，申请发明专利8项；培养博士后2名、博士研究生9名、硕士研究生14名。获国家科技进步二等奖1项、中国煤炭工业科学技术一等奖1项，获国际匹兹堡煤炭转化创新奖1项。