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2YAH1548型圆振动筛设计【8张图纸】【优秀】【Word+CAD全套设计】

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关键词：: yah1548 振动筛设计

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2YAH1548型圆振动筛设计

摘要

目前我国各种选煤厂使用的设备中,振动筛是问题较多、维修量较大的设备之一。这些问题突出表现在筛箱断梁、裂帮,稀油润滑的箱式振动器漏油、齿轮打齿、轴承温升过高、噪声大等问题,同时伴有传动带跳带断带等故障。这类问题直接影响了振动筛的使用寿命,严重影响了生产。2YAH1548型圆振动筛可以很好的解决此类问题，因此本次设计的振动筛为2YAH1548型圆振动筛，该系列振动筛主要用于煤炭行业中物料分级、脱水、脱泥、脱介等作业。其工作可靠，筛分效率高，但设备自身较重。设计分析论述了设计方案，包括振动筛的分类与特点和设计方案的确定；对物料的运动分析，对振动筛的动力学分析及动力学参数的计算，合理设计振动筛的结构尺寸；进行了激振器的偏心块等设计与计算，包括原始的设计参数，电动机的设计与校核；进行了主要零部件的设计与计算，皮带的设计计算与校核，弹簧的设计计算，轴的强度计算，轴承的选择与计算，然后进行了设备维修、安装、润滑及密封的设计，最后进行了振动筛的环保以及经济分析。

关键词：振动筛；激振器；圆振动筛

Abstract

At present, China's coal preparation plant all the equipment used in the shaker is more problems, maintenance of one of the larger equipment. These issues in sieve outstanding performance me off beam, crack help, lubrication oil dilute the box-type vibrator oil spills, fighting tooth gear, bearing temperature rise too high, major issues such as noise, accompanied by dancing with broken belts, such as fault zone. Such issues directly affecting the life of the shaker, which has seriously affected the production. 2YAH1548-round good shaker can solve such problems, so this shaker designed for round 2 YAH1548-shaker, the series of major shaker in the materials used in the coal industry classification, dehydration, desliming, such as referrals from

Operations. Its reliable, efficient screening, but their heavy equipment. Design analysis on the design options, including the classification and shaker features and design programmes to be confirmed; materials on the movement of the shaker and the dynamics of the parameters, to design the structure of vibrating screen size; conduct The eccentric block of the exciter, such as design and calculation, including the original design parameters, motor design and verification; were the main components of the design and calculation, belts and check the design and calculation, the design of spring, the axis of Strength, the choice of bearings and calculation and then proceed to the maintenance of equipment, installation, lubrication and seal the design, a shaker final environmental and economic analysis.

Key words: shaker; Vibrator; round shaker

摘要I

AbstractII

1 绪论1

1.1前言1

1.2背景1

1.2.1振动筛的发展概况1

1.2.2我国振动筛的发展概况2

1.3振动筛的分类3

1.4筛分机械发展方向4

2振动筛筛面物料运动理论5

2.1筛上物料的运动分析5

2.2正向滑动6

2.3反向滑动7

2.4跳动条件的确定7

2.5物料颗粒跳动平均运动速度8

3.振动筛的工作原理及结构组成10

3.1圆振动筛的工作原理10

3.2振动筛基本结构10

3.2.1筛箱10

3.2.2激振器10

3.2.3支承装置和隔振装置10

3.2.4 传动装置10

4.振动筛动力学基本理论11

5.振动筛参数计算15

5.1运动学参数的确定15

5.2振动筛工艺参数的确定16

5.3动力学参数17

5.4电动机的选择17

5.4.1电动机功率计算17

5.4.2选择电机18

5.4.3电机的启动条件的校核18

6主要零件的设计与计算20

6.1轴承的选择与计算20

6.1.1轴承的选择20

6.1.2轴承的寿命计算20

6.2皮带的设计21

6.2.1选取皮带的型号21

6.2.2传动比21

6.2.3带轮的基准直径21

6.2.4带速21

6.2.5确定轴间距和带的基准长度21

6.3轴的设计23

6.3.1轴的设计特点23

6.3.2轴的常用材料23

6.3.3轴的强度验算23

6.4支承弹簧设计验算26

7振动筛的安装维护及润滑28

7.1振动筛的安装及调试30

7.1.1安装前的准备30

7.1.2安装30

7.1.3试运转30

7.2操作要点31

7.3维护与检修31

7.3.1维护31

7.3.2常见故障处理32

7.4振动筛的轴承润滑的改进32

7.4.1措施32

7.4.2效果33

8 设备的环保、可靠性和经济评价34

8.1 设备的环保34

8.2 设备的可靠性32

8.2.1可靠度的计算32

8.2.2可靠度的计算33

8.3设备的经济评价35

8.3.1投资回收期35

8.3.2设备合理的更新期36

结束语37

致谢38

参考文献39

附录……………………………………………………………………..40

QQ截图20150608094330.jpg

QQ截图20150608094337.jpg

侧板.jpg

激振器.jpg

零件图1.jpg

筛面托架.jpg

总图.jpg

内容简介：: 辽宁科技大学本科生毕业设计第 1页 Screening Vibrating screens Principles -Vibrating screens save space and weight and operate on little power because the screening surface may be actuated by vibrating, gyrating or pulsating movement of small amplitude, but at frequencies that normally exceed 3,000/min. Selection of Proper Vibration Sereen -Be sure the screen supplier knows all details of the application. The centrifugal force factor, or combination of frequency of vibration (speed) and amplitude (throw), may affect performance of any vibrating screen. Also, a correct combination of slope and direction of mechanism rotation is vital for inclined screens. Usually, the larger the opening, the greater the amplitude needed for a screen. If the throw is too small, the material may clog or wedge in the openings. Increasing the throw beyond what is required to prevent blinding or plugging does not necessarily increase the life of the bearings and reduce screening efficiency. Increased rate of travel permits more tonnage to be passed over the screen per unit of time. For a given tonnage, a faster rate of travel results in a thinner bed of material and high screening efficiency. Maximum slope is reached when the material travels too fast for the fines to penetrate the ribbon of material and reach the apertures in the screen cloth. At this point an excessive amount of fine material passes over the screen with the oversize, resulting in poor efficiency. When an existing screen is to be used for an application other than that for which it was originally intended, check with the Supplier to see if any of the operating characteristics need modification and if the the screen is structurally suitable for the new application. The operator can get the correct vibrating screen by providing the supplier with the following information: Maximum tons per hour to be screened, including any circulating load or any surges in the feed rate. A complete size consist or sieve analysis of the material or, if available, an estimated analysis. Type of material and weight per cubic foot in broken state. Separations desired on each deck. Surface moisture carried by the material if screening is to be dry or amount of water with feed if wet. Special operating requirements or conditions such as temperature, abrasiveness, corrosiveness or other physical characteristics of the feed, nts 辽宁科技大学本科生毕业设计第 2页 efficiency or product requirements which determine selection of screening surface, or installation problems which affect screen size selection or capacity. General Types -Vibrating screens may be divided into two main classes: mechanically-vibrated and electrially-vibrated. The former can be subdivided into classes based on how the vibration is produced-by eccentrics; by unbalanced weight; by cams or bumpers. They can also be subdivided as inclined and horizontal. Sizes -Vibrating screens are made in standard sizes of from 12 in. to 10 ft wide and from 2 1/2 ft to 28 ft long. Common practice dictates that the length of the screen should be 2.5 times the width for dry screening. For wet screening, wider and shorter screen is best. Screens for scalping ahead of primary crushers, operate at a slope of from 12 degrees to 18 degrees and have openings as large as 11-in. square. The eccentric throw for openings from 5 to 11 in. is usually 1/2 in.; for openings from 3 to 5 in. about 3/8 in.; and for smaller openings 1/4 in. The screening surface consists of a heavy cast desk, perforated steel with or without skid bars welded between the holes, rod deck, etc. The mechanical shaking screen comprises a rectangular frame, with perforated steel or wire cloth screening medium. It is usually inclined and suspended on loose rods or cables. These screens now are used mainly for special tasks of coarse screening, having given way to vibrating screens. Electrically-Heated Screens -Electrically heated screen cloth decks have afforded better screening and less dust. Modern or updated screening operations, now handling clays, limestone, potash, salts, phosphates and various hydroscopic materials, report minimum dust loss when equipped with heated screens. The controlling factor in this improvement is the electrically-heated screen doth deck. Any vibratory screen with fine opening (less than 1/2 in.) can be equipped with low volt-age-high amperage resistance heating. The principle of electric heating is based on the fact that small diameter wire of screen cloth (especially stainless steel) serves as a conductor, but offers resistance to a high-amperage current. This resistance causes heating of the wire when powerful transformer and specially designed bus bars connected to screen doth decks push up to 6,000 amps current into a circuit. The current is safe and shock-proof because voltage is low, ranging from approximately 1 1/2 to 16 volts. Workers can do their jobs around electrically-heated screens without special precautions. Heated screens are effective in preventing moisture content of material from causing buildup and blinding. The screen wire is kept at 100 degrees to 130 degrees F depending on character and tonnage of the material processed. This temperature is not high enough to weaken the wire cloth or screen structure, nor does it suffice to drive off moisture held in material. The warm wire stays dry, breaking the surface tension that otherwise would bind damp material to cold, damp metal. This differential or nts 辽宁科技大学本科生毕业设计第 3页 warm, dry screen wire versus cold, damp material can be maintained economically through transformer control settings. With every opening in the heated screen mesh protected against blinding, there is no guesswork about what size particle will be delivered. A uniform, unvarying quality to meet tough specifications comes through day after day, no matter what the weather. (High humidity makes trouble with unheated screens.) Plants operating heated screens will have no trouble with excessive amounts of fine, dusty material that formerly sifted through reduced meshes on clogged screens. Service life of screen cloth is greatly increased when electric heating ends the punishment of old-fashioned cleaning methods, such as rough pounding or brushing. Blowtorch flames put too much heat in one spot and bouncing chains added to wear and tear. But, screens kept clean and open with electric heating reportedly are seldom mistreated and last up to eight times as long. Heated decks end the threat of pile ups and strains that can break the mesh. Economical operation of electric heating for screens requires one transformer for installations of up to three panels of screen cloth (maximum area 4- x 12-ft). Two transformers are used on longer decks. Any deck (top, center or bottom) can be heated. Electric heating is most desirable of all where a screen surface is hard to get at. Changing heated screens does not involve more unbolting than needed for ordinary screens. In specifying screens to deliver a uniform particle through heated mesh, the first thing to consider is weight per square foot of the wire cloth needed to set up appropriate resistance. Most calculations are based on square openings. Slotted openings must be identified as to width of clear opening, diameter of wire and number of wires per inch before weight per square foot can be found in any screen cloth manufacturers catalog. Having determined the usable weight per square foot of screen cloth, the next step is to select the size of clear opening needed, making no allowance for reduction in this size as formerly was the case when material stuck to the wires. Heated wires will maintain the clear opening at all times, making it possible to screen finer without blinding. From a wire catalog, select a mesh weighing no more per square foot (can weigh less) than determined using the method above with the clear opening characteristics desired. This often turns out to be a more efficient screen because the wire diameter will be smaller and the percentage of the open area will be greater. For example, where a 1/8-in. clear opening was desired (but often blinded) on unheated screens, the wire diameter was 0.63 and the open area was 44 percent. The cloth weighed 1.43 lb/ft. 2. For a heated 3- x 12-ft screen, the weight must not exceed nts 辽宁科技大学本科生毕业设计第 4页 1.1 lb/ft2. Two options were found in cloth with 1/8-in. clear opening: wire diameter .054 weighing 1.09 lb/ft2 providing 48.8 percent open area; and wire diameter .047 weighing 0.85 lb/ft2 with a 52.8 percent open area. Load conditions may make fine diameters of carbon

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