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课程设计 XLL-1100立式螺旋卸料离心脱水机(附开题报告,AutoCAD图,正文共69页,25916字)
摘要
本文通过对国内外离心过滤技术研究现状的分析和亲身的现场时间工作经验总结，指出了离心脱水技术的重要性，和未来在该领域内需要开展的理论研究方向。文中描述了离心力场的基本特征，提出了提高分离因数的基本途径；结合立式螺旋卸料离心机的脱水机理，分析了颗粒在筛面上的运动情况，运用数学方法和理论力学知识建立了物料在筛篮运动上的动力学模型。对XLL—1100型离心机的结构、零部件和工作原理进行了细致的分析研究，并针对现场使用过程中出现的问题进行了原因分析。XLL—1100型离心脱水及存在处理能力低、入料粒度范围小等问题，主要原因是由于刮刀与筛篮设计不合理、过煤面积小造成的。本论文在对筛筛篮和螺旋刮刀进行研究的基础上，对筛篮和螺旋刮刀进行改进设计，并对分配盘角度进行了改进。把螺旋刮刀的升角减小到20°，分配盘角度由原来的90°改为150°，并在其上增加加大导流叶片更利于煤的疏导，提高了处理效率。
关键词：离心机；螺旋刮刀；分离因数。
ABSTRACT
This article through summarized to the domestic and foreign Centrifugal Filter engineering research present situation analysis and the oneself scene time work experience, had pointed out the centrifugaldehydration technology importance, with the future the fundamentalresearch direction which will need to develop in this gentrifugalism domain.Asked described the centrifugal force field basic characteristic,proposed the enhancement separation factor essential way; Unifies the vertical spiral Discharge centrifuge the dehydratedmechanism, has analyzed the pellet in screening surface movementsituation, established the material using mathematics method and the theoretical mechanics knowledge in to sieve in the basket movementdynamics model. To the XLL-1,100 centrifuges structures, the spare part and theprinciple of work has conducted the careful analysis research, andaimed at the question which in the field use process appeared to carryon the reason analysis. The XLL -1,100 gentrifugalism dehydrations and the existence handlingability low, enters the material granularity scope slightly and so onthe question, the main reason is because the shaving knife with sieves the basket design not to be unreasonable, the coal area slightly tocreate. The present paper in to sieves the basket and the spiral shaving knifeconducts the research in the foundation, to sieves the basket and thespiral shaving knife carries on the improvement design, and has madethe improvement to the distributor disk angle. Angle reduces the spiral shaving knife 20°, the distributor diskangle by original 90° changes 150°, and increases in above enlargesthe stator vane favor the coal unblocking, enhanced the processingefficiency.
Key word: Centrifuge; Spiral shaving knife; Separation factor.
目录
1 绪论.............................................1
1.1引言.....1
1.2选煤的工艺过程....................................1
1.3 选煤产品的脱水...................................3
2 离心分离理论及设备.................6
2.1离心力场的基本特性............................6
2.1.1 离心力和分离因数......................6
2.1.2 哥氏力..........................................8
2.1.3 离心液压…..................................8
2.2 分离物料的特性...................................9
2.2.1 悬浮液特性................................9
2.2.2 固体颗粒特性..........................10
2.3离心分离理论及分离原理..................11
3 XLL-1100型离心脱水机总体设计…......................12
3.1设计选用机型及工作原理................12
3.2离心机整体方案的确定及结构特点12
3.2.1 工作部分..................................13
3.2.2 传动部分..................................14
3.2.3 润滑系统…..............................14
3.3主要技术特征....................................14
3.4 安装与运转.......................................15
3.4.1 安装..........................................15
3.4.2 运转..........................................15
3.5 操作与维护.......................................16
3.5.1 操作..........................................16
3.5.2 维护..........................................17
4 工作部分设计...........................19
4.1 分离因数 Fr的确定.........................19
4.2 筛篮转速确定...................................19
4.3 筛篮结构设计...................................20
4.3.1筛篮大端直径D.......................20
4.3.2筛篮长度H...............................21
4.3.3筛篮半锥角α的确定...............21
4.3.4筛网选型及其特征对脱水效果的影响...............27
4.3.5筛网缝隙宽度的选择...............27
4.3.6筛网缝隙排列对分离效果的影响....................28
4.3.7 筛篮主要参数..........................28
4.3.8筛篮强度校核...........................28
4.3.9筛篮的制造...............................30
4.3.10筛篮的平衡实验...... ..31
4.4螺旋转子结构设计..............................31
4.4.1螺旋转子结构...........................31
4.4.2螺旋转子的升角的确定...........33
4.4.3提高刮刀耐磨性措施...............33
4.5离心机生产能力校核..........................33
4.6筛篮与刮刀转子间间隙的确定..........35
4.7 分配盘结构设计.................................35
4.8钟形罩结构设计..................................36
4.9壳体结构设计......................................36
4.10减震装置设计....................................38
4.11润滑系统的设计.................................40
5经济技术分析............................42
6小节............................................44
参考文献.......................................45
致谢辞...........................................47
附录（汉英）...............................48