三通道吊式直线振动筛

论文编号:JX297 所有图纸,外文翻译。论文字数:28368.页数:77

摘   要

     筛分作业是煤炭加工的重要环节，它广泛用于筛选厂和选煤厂。筛分作业所用的设备多为振动筛
振动筛是一种适合潮湿细粒级难筛物料干法筛分的振动筛分机械设备，是目前国内处理难筛物料的振动筛分机械设备。振动筛具有大振幅、大振动强度、较低频率和弹性筛面的工艺特点。工作过程中始终保持最大的开孔率，从而筛分效率高、处理能力大，筛板更换方便，降低了成本。振动筛超大筛面和大处理能力可满足现场的生产需要。振动筛筛子的结构采用多段筛面振动而筛箱和机架不参与振动的运动方式，使筛子实现了大型化。
我国的直线振动筛研究一直落后与国外，特别是在大型化方面。
该设计结构与普通筛不一样，它有4块侧板，中间两侧是主要的，振动器安装在它上面，由它向筛面传递振动力，外面两块是次要的，只起挡料板的作用。物料是通过三个通道筛分和运输的，这种结构的最大优点是横梁尺寸可以大大减小，大大降低参振质量。经济效益十分明显，而且筛型越大，效果越明显。
激振力直接由侧板传递到各个部件上,省去工字大梁,降低了筛箱重量和成本,但对筛箱结构设计提出了较高的要求,为此我们对筛箱强度、刚度、重心、空间结构进行了优化设计。

关键词：
选煤机械； 振动筛； 设计； 筛分

Abstract

The screening work is the coal processing important link, it widely uses in screening the factory and the coal dressing plant.
The screening work uses the equipment many shaker is one kind suits the moist thin grade for shaker the difficult to sieve the material dry screening the vibration screening mechanical device, is the present domestic processing difficult to sieve the material the vibration screening mechanical device. The shaker has the great oscillation amplitude, the big intensity of vibration, to compare the low frequency and the elastic screening surface craft characteristic. In the work process maintains the biggest percentage open area throughout, thus the screening efficiency is high, handling ability is big, the lamina crib Rosa replacement was convenient, reduced the cost. The shaker ultra big screening surface and big handling ability may satisfy the scene the production need. The shaker screen's structure uses the multistage screening surface vibration to sieve the box and the rack does not participate in the vibration the mode of motion, caused the screen to realize the large scale.
Our country's straight line shaker research has been backward and is overseas, specially in large scale aspect.
The this design structure and sieves ordinary is dissimilar, it has 4 side bars, the middle both sides are main, the vibrator installs above it, by it to the screening surface transmission vibration power, outside two is secondary, only plays keeps off the yard lumber the role. The material is through three channel screening and the transportation, this kind of structure's biggest merit is the crossbeam size may reduce greatly, reduces the Parameter to inspire the quality greatly. The economic efficiency is very obvious, moreover sieves is bigger, effect more obvious.
The exciting force transmits on directly each part from the side bar, omits the I-girder, reduced has sieved the box weight and the cost, but to sieved the box structural design to propose the high request, we to sieved the box intensity, the rigidity, the center of gravity, the spatial structure to carry on the optimization design for this reason.

Keywords:
coal preparation machine； vibrating screen；  design；  screening

目    录

1 概述 ...................................................................1
1.1 筛分机构的分类 .......................................................1
1.2 振动筛............................................................... 1
1.3 国内外筛分机械行业现状............................................... 2
1.3.1 筛分机械的应用..................................................... 2
1.3.2 国内外筛分机械的发展 ...............................................3
1.3.3 国内振动筛的研发和制造能力 .........................................5
1.4 筛分机械发展趋势..................................................... 6
1.5 振动筛的工作原理..................................................... 7
1.5.1 惯性振动筛的工作原理............................................... 8
1.5.2 直线振动筛的工作原理............................................... 8
1.5.3 直线振动筛筛面上物料的运动分析 .....................................10
2 直线筛的设计 ...........................................................12
2.1 振动筛的选择......................................................... 12
2.2 激振器的确定 .........................................................13
2.3 三通道分法的优点..................................................... 17
3 直线筛结构设计......................................................... 26
3.1 筛箱结构............................................................. 26
3.2 激振器的选择 .........................................................27
3.3 筛面及其紧固装置..................................................... 28
3.3.1 筛面的安装型式 .....................................................28
3.3.2 筛框............................................................... 31
3.3.4 传动方式........................................................... 33
3.3.4 支撑装置 ...........................................................36
4 主要工艺参数和技术参数 .................................................37
4.1单层三通道吊式直线振动筛的技术特征.................................... 37
4.2 筛面倾角a ............................................................37
4.3 振动方向角B.......................................................... 37
4.4 筛面的振幅........................................................... 38
4.5 筛面的振动次数 .......................................................38
4.6 生产率的计算 .........................................................40
4.7 偏心块的设计与计算................................................... 41
4.8 轴承的选取与校核..................................................... 46
4.9 轴的设计和校核 .......................................................47
4.10 键的选择和校核...................................................... 50
4.11 弹簧的设计计算...................................................... 51
4.12 横梁的设计和校核.................................................... 52
5 使用说明书............................................................. 55
5.1 激振器的密封与润滑................................................... 55
5.2 筛分机的使用和维护 ...................................................55
5.3 振动筛的操作、维护和维修............................................. 56
5.4 振动机的安全技术 .....................................................56
5.5 筛子的常见故障和消除措施 .............................................57
参考文献 .................................................................59
小结 ....................................................................61
英文原文 .................................................................62
中文译文................................................................. 69
致  谢................................................................... 76