机械毕业设计英文外文翻译187关于重力清选机几个问题的探讨.docx
机械毕业设计英文外文翻译187关于重力清选机几个问题的探讨
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机械毕业设计英文外文翻译187关于重力清选机几个问题的探讨,机械毕业设计英文翻译文献翻译
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附录 About gravity qing separator is discussed some problems According to the content and gravity qing separator for dry bulk density, liquidity, choose the clear separation. This equipment often used in improving seed, grain,minerals and recycling material quality products. This paper stated the gravity clear how to work there, working with the use of material is gravity clear separator adapt, how to select the gravity qing separator, gravity qing separator mesa of the mixed zone seed treatment and gravity, there have a good clear investment prospects. If the material contains light impurity, mildew metamorphic seeds, weed seeds and heavy impurity,So can use gravity qing separator, through the material of it from the material in bulk density points To improve the material from out of the quality. For instance in processing seeds and grain process, do not The full, worms cracking seeds (grain), not mature, mildew seeds (valley Content), weed seeds,Small stones from good seeds (grain) of separation of to improve Seed germination rate and clarity. However, not every kind of material can be gravity high efficiency in the qing qing separator choose points From, sometimes use many sets of gravity when the qing qing separator material chosen separation effect is not obvious The. Here there how to work the gravity. How to determine whether the material and gravity Qing separator adapt. 1 there is clear how gravity 1. 1 gravity structure of qing separator 1. 1. 1Typical of the gravity qing separator by frameWith a sieve net, material of conducting bar torque Form vibration mesa (or triangle mesa), one or more Taiwan fan, wind room, feed hopper,Discharging system, CVT institutions. 1. 1. 2 general mesa change from 46 cm x 92 cm to 183 cmx457. 5 cm, mesa in two directions Angle can be adjusted. 1. 1. 3 feeding device installed in the washing machine of gravity (at least for 15 minutes or more consecutive materials; next, mesa high above the edge. Feeding device may have condiment door， Through the material door can increase or decrease the mesa of material flow. Mesa have ntsthree materials Row export, heavy material and light material row in feeding and export mouth relative low mesa Edge, of course, intermediate product material row in heavy material and export light material among export. 1. 1. 4 vibration device installed in the bottom of the table, a kind of eccentric movement for vibration.A fan or a group of fans also be placed in the table below. Automatic control panel and laid it inMesa make handlers beside convenient to console the dip Angle, vibration frequency and windVolume. 1. 2 working principle 1.2.1 material layer At work, the material from bunker eduction, flows through feeding device to gravity clear choice Machine woven nets mesa, mesa is mainly along the vertical vibration, mesa vibration frequency For 200 time/minutes to 600 times/minutes. The vibration of the mesa and air flow to make materials spread And a fluid state. Air through the wind chamber spread to mesa on screen mesh, through the control gas Flow make mesa material produce the layer (and not light material be given heavier blow in material out), Heavy materials remain in mesa, light material in air under the action of floating in heavy leave mesa Material above. At this time the materials under layered area. Mesa material distribution in the material and guide Between article, help mesa materials uniform transition. 1. 2.2 things shake separation Vibration in two direction mesa have tilt, to promote material separation and discharging in Mesa material stratification, because the mesa vibration influence, mesa heavier particles due to the ground Wipe the force ACTS to mesa high edge mobile, heavy material on the mesa the crawling to mesa high Edge, and float in heavy material above the lighter particles, by gravity to lower edge mobile, So the material into a vertical stratification level separation. Heavy material over the edge of the mesa high living board The door, the outflow into heavy material row mesa export; At the same time, the light material flow of mesa low Edge, into the light material row exports. So clear separator finished materials gravity separation Process. The proportion of medium within the scope of the particles called intermediate products, intermediate products be given heavier, Light materialRow export middle area into its row. 1. 2. 3 material choose clear separation is the premise of material layer, material layered regional ntsgeneral From feed mouth began to no more than a third of the mesa, only the material fully stratification, just Can make different density of material completely separate. 1. 2. 4 material into the gravity there must be approved by a clear before the washing to remove material in the screen Most of the chaff, leaf stalks and big miscellaneous, then into the gravity of the separator basic materials On similar appearance, just on the density change. 2 how to choose a gravity clear there In determining the material of the gravity clear the adaptability of the separator, the next step is to content Material in clear on the gravity there, to determine the most suitable for the gravity of the material washing qing. 2. 1 provide sample The premise of the test is to provide adequate test first material sample. For big The gravity model clear separator, need to provide several tons of material make it can pack to gravity clear store there After the storehouse for feeding and processing, gravity for lab sorting machine, you are required to offer 57g Or so the material sample. 2.2 analysis gravity clear separation of the good material washing and abandon material sample (1) good material quality whether meet your requirements, material quality improvement of process How degrees. (2) rejected material is how many, rejected material in the content of good material How much 畚 The machining process of good material in the future if can recycle. (3) as gravity qing separator try Check the results, and the material quality be dropped, the quality descend the reason is to adjust (such as mesa vibration Still need to reduce) or storage, material feeding device, Discharging mouthAnd the cause of the hoist.(4) clearChoose separation effect is a can achieve. If you cant reach, can you change a large Gravity qing separator, productivity in the lower limit of materials processing to make materials have a long separation A process to improve separation result. 2.3 the material mouth was different materials bulk density Through the determination of the material KouChong different material and light material differences reflect gravity qing The qing choose washing effect. For seed batch of speaking, in the determination of bulk density, meanwhile, the different Material of the seed germination rate and mouth clarity in a seed checkout room. 3 Gravity qing separator mixed zone materials handling nts3.1 the T-shirt material by gravity after washing the intermediate product material (about 20% or so) The problem is more trouble between. According to domestic common practice is intermediate product materials for again The gravity of the separator feeding mouth. Gravity enter the homework after washing the state, each unit Several are stable, by gravity of intermediate product material clear separator, the second time There is a clear gravity in the form of intermediate product material discharge. Gravity qing separator Industry after several hours, intermediate product material is piling up, plus the normal material feeding,Gravity qing separator unbearable heavy burden, clear choose effect is reduced, reduce the complete sets of equipment to use effect Fruit (for wheat seed gravity is chosen last procedure for corn seeds, at present Classification process . 3.2 foreign to this problem puts forward more objective practice, they say the feeling Often appear in the form. General intermediate product material by heavy small materials and light big materials group Become, will intermediate product materials into the wind to screen the separator (and not gravity feed entrance qing Separator entrance) hello again a screening and, to some extent, improve the physics properties of materials (xi 1, form Size), be helpful for gravity qing separator Light go into battle, make each type of production in production Force matching, balanced, improve the material qing choose effect, or intermediate product material deposited in the AD The door in the warehouse. To use single small gravity qing separator processing or intermediate product materials Eliminated. The three methods is likely to increase in the cost of production line, but smooth production line Tong, this is the domestic make seeds add. nts 关于重力清选机几个问题的探讨 重力清选机根据物并的容重对干燥的、有流动性的顺拉进行清选分离。这种设备经常应用在改进种子、谷物、矿物和回收物质的产品品质。本文主要陈述了重力清选机如何工作 , 所加工的物料是否与所使用的重力清选机相适应 , 如何选择重力清选机 , 重力清选机台面混合区种子处理及所纳重力清选机是否有好的投资前景。 如果物料中含有轻杂质、霉烂变质种子、杂草种子和重杂 ,那么可以使用重力清选机 , 通过物料的容重将它们从物料中分离出来以改进物料的品质。比如在加工种子和谷物过程中 , 不饱满的、被虫子磕过的种子 (谷物 ) 、不成 熟的、霉烂种子 (谷 物 ) 、杂草种子、小石子从好的种子 (谷物 ) 中分离出来 , 以提高种子净度和发芽率 .然而并不是每一种物料都能被重力清选机高效地清选分离 , 有时使用多台重力清选机时物料的清选分离效果仍不显著。下面介绍重力清选机如何工作。如何确定是否物料与重力清选机相适应 , 怎样选择一台重力清选机 , 重力清选机台面混合区种子处理及是否有好的投资前景 . 1 重力清选机是怎样工作的 1.1 重力清选机的结构 1.1.1 典型的重力清选机由机架、带有筛网、有物料导条的矩形振动台面 (或三角形台面 ) 、一台或多台风机、风室、喂料斗、排料系统、无级变速机构组成。 1.1.2 一般台面变化从 46cmx92cm 183cmx457cm ,台面两个方向的角度可以调整。 1.1.3 喂入装置安装在重力清选机料仓 (至少连续供物料 15分钟以上下面 , 台面高边上面。喂入装置上有可调料门 , 通过料门可以增加或减少台面上的物料的流量。台面上有三个物料排出口 , 重物料和轻物料排出口设在与喂料口相对的台面低 边 , 当然 , 中级品物料排出口设在重物料和轻物料出口中间。 1.1.4 振动装置安装在台面的下方 , 振动为一种偏心运动 。一台风机或一组风机nts也被安置在台面下方。自动控制面板安放在台面旁边使操作者能够方便地控制台面的倾角、振动频率和风量。 1.2 工作原理 1.2.1 物料分层 在工作时 , 物料从料仓排出 , 流经喂入装置到达重力清选机编织网台面上 , 台面振动主要是沿纵向进行 , 台面振动频率为 20 0 次 / 分钟到 60 次 / 分钟。台面的振动和气流使物料扩散而呈流体状态。气流通过风室扩散到台面筛网上 , 通过控制气流使台面物料产生分层 (而不是轻的物料从重物料中吹出来 ) ,重物料仍保持在台面上 , 轻物料在气流作用下离开台面浮 在重物料上面。这时物料处于分层区。台面上的物料分布在物料导条之间 , 有助于台面物料均匀过渡。 1.2.2 物抖分离 振动台面在两个方向都有倾斜 , 以促进物料分离和排料在台面物料分层后 , 由于台面振动影响 , 台面上较重颗粒由于磨擦力作用向台面高边移动 , 重物料贴着台面“ 爬行”到台面的高边 , 而浮在重物料上面较轻的颗粒 , 在重力作用下向低边移动 ,于是物料垂直分层变为水平分离。重物料越过台面高边的活板门 , 流出台面进入重物料排出口 ; 同时 , 轻物料流向台面的低边 , 进入轻物料排出口。于是重力清选机完成了 物料的分离过程。中等比重范围内的颗粒被称为中级品 , 中级品从重、轻物料排出口中间的区域进入其排料口。 1.2.3 物料清选分离的前提是物料分层 , 物料分层区域一般从喂料口开始不超过台面的 3 分之 1 , 只有物料充分分层 , 才能使不同容重的物料彻底分离。 1.2.4 物料进入重力清选机之前须经风筛清选机除去物料中大部分的谷壳、叶梗和大杂 , 那么进入重力清选机的物料基本上外形相似
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