基于参数化思想的井下滚轴筛设计  

Design of underground roll screen based on the parametrization perspective

作　　者：刘晓军 LIU Xiaojun(CCTEG Tangshan Research Institute Co.Ltd.,Tangshan 063012,China;Hebei Province Coal Washing Technology Innovation Center,Tangshan 063012,China)

机构地区：[1]中煤科工集团唐山研究院有限公司,河北唐山063012 [2]河北省煤炭洗选技术创新中心,河北唐山063012

出　　处：《选煤技术》2024年第3期35-39,共5页Coal Preparation Technology

基　　金：天地科技股份有限公司科技创新创业资金专项项目(2023-TD-ZD004)。

摘　　要：为适应煤矿井下筛分对设备安装检修、硐室设计以及减少筛分土建投资等方面的要求,针对现有装备的不足,运用参数化设计思想,通过筛分过程的仿真以及关键部件的有限元分析,进行了井下滚轴筛的设计。最终确定:井下滚轴筛采用三段分体模块化结构,以便于设备的安装和维护,三段筛面连接后呈香蕉形,各段箱体均采用全密封结构,无粉尘外溢且噪声低;筛面宽度应大于物料的最大粒度(D_(max))的3倍,筛面长度应为筛宽的3~8倍;每根筛轴均通过弹性柱销联轴器与筛箱外侧的驱动电机一一相连,可对每根筛轴的转速进行实时调整,同时也方便检修和维护;筛盘所受应力为0.018 MPa,位置在齿尖处,筛轴以弯曲应力为主,最大应力为1.71 MPa,位置在轴承处,二者材质均选用经调质处理的45_#钢,可满足使用要求;优化筛轴转速、筛面倾角等因素可优化筛分效率;采用迭代算法进行优化,可在筛分效率最大化的前提下最大限度地提高滚轴筛处理量。运用参数化思想设计得到的井下滚轴筛达到了设计目标,为井下筛分的推广应用提供了一定的装备基础。In order to facilitate the installation and maintenance of roll screen used in underground mine and design of screen chamber,and to meet the requirement for reduction of investment in civil work,as well as in consideration of the inadequacy of such screens,the roll screen is redesigned through simulation of its screening process and finite-element analysis of the screen′s key parts,based on a parametrization perspective.It is finally defined that the screen is preferably in a 3-section modular structure for facilitating its mounting and maintenance,and the screen deck formed up through connection of the three sections is in form of a banana;the box of each section is totally encapsulated for avoiding escape of dust and for abatement of noise;the width of the deck is three-fold that of the maximum size of material while deck′s length is 3~8 times that of its width;each shaft is linked up to the drive motor on outside of the screen box via a flexible pin coupling for facilitating real-time adjustment of the shaft′s rotating speed,as well as repair and maintenance;the pan of the screen is subjected to a stress of 0.018 MPa at the point of tooth tip while the screen shaft is subjected principally to a bending stress with a maximum magnitude of 1.71 MPa at the both made of heat-treated 45#steel which can meet the specifications as required.Through optimization of shaft speed and inclination angle of screen surface using iteration algorithm,while maintaining the highest screening efficiency,the capacity of the screen can be raised to a maximum.The roll screen designed based on the parameterization concept proves to be able to reach the expected objective,and its design provides a basis for the widespread application of the screen underground.

关 键 词：井下筛分 井下滚轴筛 参数化设计 筛分过程仿真 有限元分析 筛分过程智能控制 

分 类 号：TD452[矿业工程—矿山机电]