Structure Design of a Belt Conveyor
Student name: Hao Zu Zhen Class: 1081023 Supervisor: Liu WenGuang
Abstract: What is designed in this paper is belt conveyor, the design requirements are:
transport of materials: lime, transport capacity: 50 tons / hour, transmission length: 30meters, 2.5meters high upgrade; Bulk Density: 900 kg / m 3; materials in the dynamic accumulation of the surface with angle is 30°, conveyor idlers speed: 2 m / s, on the trough roller arrangement. Today, long distance, high speed, low friction is the direction of belt conveyor’s development. Air cushion belt conveyor is one of them. At present, we still fall far short of abroad advanced technology in design, manufacture and using. There are a lot of wastes in the design of belt conveyor.
The main work of this design include ;Completed the overall design of the belt conveyor; And based on the introduced conveyor belt,driving device,slotted roller,roller,frame and the middle frame and so on.Then completed the design and calculation of main components ,and finally running deviation of belt conveyor problem is studied.
Keywords: slotted roller belt conveyor conveyor idlers
Signature of Supervisor:
目 录
1 绪 论 ......................................................................................................................... 1
1.1 带式输送机的概述 ................................................................................................. 1 1.2 带式输送机的工作原理 ......................................................................................... 2 1.3带式输送机的种类 .................................................................................................. 3
1.3.1按可否移动分类 ............................................................................................ 3 1.3.2 按承载能力分类 ........................................................................................... 3 1.3.3 按输送带的结构形式分类 ........................................................................... 3 1.4 本文的主要工作 ..................................................................................................... 4
2 带式输送机的总体构成及部件选用 ............................................................ 5
2.1 输送带 ..................................................................................................................... 5
2.1.1 输送带的分类 ............................................................................................... 5 2.1.2 输送带的选用 ............................................................................................... 5 2.2驱动装置 .................................................................................................................. 8 2.3传动滚筒 .................................................................................................................. 9
2.3.1 传动滚筒的作用及类型 ............................................................................... 9 2.3.2 传动滚筒的选型及设计 ............................................................................... 9 2.3.3 传动滚筒结构 ............................................................................................. 10 2.3.4 改向滚筒 ..................................................................................................... 10 2.4 托辊 ..................................................................................................................... 10 2.5 机架与中间架 ....................................................................................................... 12 2.6 拉紧装置 ............................................................................................................... 13
2.6.1拉紧装置的作用 .......................................................................................... 13 2.6.2拉紧装置的结构形式 .................................................................................. 13 2.7 制动装置 ............................................................................................................. 15
2.7.1 逆止器 ......................................................................................................... 15 2.7.2 制动器 ....................................................................................................... 16
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2.8 清扫器 ................................................................................................................... 16
2.8.1头部清扫器 .................................................................................................. 16 2.8.2 空段清扫器 ................................................................................................. 17 2.9 卸料装置及导料槽 ............................................................................................... 17
3 带式输送机的计算 ................................................................................................ 18
3.1 原始数据及工作条件 ........................................................................................... 18 3.2 输送带选择步骤 ................................................................................................... 18
3.2.1选定带宽 ...................................................................................................... 18 3.2.2输送带上物料流横截面面积S的计算 ...................................................... 19 3.3 圆周驱动力 ........................................................................................................... 20
3.3.1 圆周驱动力(N) Fu ...................................................................................... 20 3.3.2主要阻力F ............................................................................................... 20 3.3.3附加阻力FN ................................................................................................ 21 3.3.4主要特征阻力
........................................................................................ 21
3.3.5附加特种阻力Fs ....................................................................................... 22 3.3.6倾斜阻力Fst ................................................................................................ 22 3.4 输送带张力 ......................................................................................................... 23
3.4.1 输送带不打滑条件 ..................................................................................... 23 3.4.2 输送带下垂度校核 ..................................................................................... 23 3.4.3各特性点张力(N) ......................................................................................... 24 3.5 传动滚筒轴功率 ................................................................................................. 24 3.6 电动机功率和驱动装置组合 ............................................................................. 25 3.7输送带选择计算 .................................................................................................... 25
3.7.1织物芯输送带层数 ...................................................................................... 25 3.7.2 输送带厚度 ................................................................................................. 26 3.8托辊的选用计算 .................................................................................................... 26 3.9 输送带的强度校核 ............................................................................................... 27 3.10传动滚筒轴的强度计算和校核 .......................................................................... 28
3.10.1传动滚筒的载荷集度 ................................................................................ 28
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3.10.2传动滚筒扭矩M（N?m） ..................................................................... 28 3.10.3抗弯截面系数W ....................................................................................... 28 3.10.4滚筒轴的弯曲强度 .................................................................................... 29 3.11传动滚筒轴承的寿命计算 .................................................................................. 29
4带式输送机皮带跑偏问题 .................................................................................. 32
毕业设计总结 ............................................................................................................... 36 致 谢 .............................................................................................................................. 36 参考文献 ......................................................................................................................... 37
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南昌航空大学科技学院2014届学士学位论文
1.绪 论
1.1 带式输送机的概述
带式输送机是一种摩擦驱动以连续方式运输物料的机械。应用它，可以将物料在一定的输送线上。它既可以进行碎散物料的输送，还可以与各工业企业生产流程中的工艺过程的要求相配合，形成有节奏的流水作业运输线。所以带式输送机广泛应用于现代化的各种工业企业中。
( 1 ) DTⅡ 江型固定式带式输送机适用的工作环境温度一般为-25 ~40 ℃ 。对于在特殊环境中工作的带式输送机，如要求具有耐热、耐寒、防水、防腐、防爆、阻燃等条件，应另行采取相应的防护措施。
( 2 ) DTⅡ互型固定式带式输送机是通用型系列产品，可广泛用于冶金、矿山、煤炭、港口、电站、建材、化工、轻工、石油等各个行业。由单机或多机组合成运输系统来输送物料，可输送松散密度为500 -- 2500kg / 件物品。
( 3 ）输送机允许输送的物料粒度取决于带宽、带速、槽角和倾角，也取决于大块物料出现的频率。各种带宽适用的最大粒度，本系列推荐按表2 一1 选取。当输送硬岩时，带宽超过1200mm 后，粒度一般应限制在350mm 范围内，而不能随带宽的增加而加大。
( 4 ) DTⅡ型固定式带式输送机均按部件系列进行设计。设计者可根据输送工艺要求，按不同的地形、工况进行选型设计并组合成整台输送机。
表1-1 各种带宽适用的最大粒度 mm
带宽 500 650 800 1000 1200 1400 1600 1800 2000 2200 2400 ，的各种散状物料及成
最大粒度 100 150 200 300 350 350 350 350 350 350 350 注：粒度尺寸系指物料块最大线性尺寸．
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