機(jī)械設(shè)計(jì)外文翻譯-文庫吧資料
2025-07-02 05:13本頁面
【正文】 motor is usually used for tools of this type. They are available in a wide range of speed and power.DrillA rotary vanetype air motor is usually used for drills, reamers, tappers, and stud setters. Drills and reamers are used for steel, wood, and other materials. Some tools are reversible, with rotation possible in either direction, and tools are nonreversible. Drill speed can be caried by throttling the air supply to the drill. Portable drills powered by a vanetype rotary air motor are used also for drilling any mineral substance that can be penetrated by an auger or a tungsten carbied bitfor example, coal, chalk, shale, and hardpan.ScrewdriversA rotary vanetype air motor is usually used for screwdrivers, nut srtters, impact wrencher, and nibblers. Millions of nut, bolts, and screws, are driven daily by pneumatic tools in the large production plants making products,such as automobiles,refrigerator,radios,and various impact wrenches are used to remove or to tighten nuts by torsional or rotary impact,and pneumatic nibblers,and shears are used for cutting and sheathing steel metal. HammerIn the penbmatic chipping hammer,a piston delivers a series of blows to a forming tool or chisel at the end of the hammer。thus torque can be controlled by means of the pressure air motor can be arranged to be recersible in speed direction,by means of a fourway shown,the speed decreases as the load motor can be stalled without any damage being done.A curve for horsepower versus speed for a rotarytype air motor is power output is at a maximum between zero and maximum output is proportional to the product of torque times angular or rotational speed(rpm).The speed,torque,and direction og rotation of an air motor can be controlled and adjusted to job example,reversible air motors are used to turn or screm studs into castings,when assembling air pressure to the air motor is regulated,so that the air motor stalls when the stud is driven to the correct this instance,the air motor starts off at high speed(very low torque),is quickly loaded so that it stalls,and is then air motor has no tendency to heat when it is overheating。有些裝載機(jī)用漏斗或料槽把物料送進(jìn)運(yùn)輸設(shè)備中。刮板固定在螺旋給料器的下方。該裝載機(jī)的工作機(jī)構(gòu)是兩個(gè)左右螺旋桿組成的螺旋給料器，安裝在斗式提升機(jī)的兩側(cè)。多斗裝載機(jī)可用于混凝土預(yù)制品廠的生產(chǎn)線中，也可用于筑路。此外，該機(jī)還適用于對(duì)松散物料的顆粒分級(jí)，為此，可以安裝一個(gè)專用的振動(dòng)篩。多斗裝載機(jī)的產(chǎn)量比同一額定功率的單斗裝載機(jī)的產(chǎn)量高40%~60%。前卸式機(jī)構(gòu)只允許從裝料的一側(cè)卸料；側(cè)卸式機(jī)構(gòu)是側(cè)面卸料；翻轉(zhuǎn)式機(jī)構(gòu)則從后面卸料。在這些換裝裝置中，主要附件是鏟斗。單斗裝載機(jī)以履帶拖拉機(jī)或輪胎拖拉機(jī)作為行走機(jī)架。液力變距傳動(dòng)系統(tǒng)使運(yùn)動(dòng)平穩(wěn)。這些裝載機(jī)是根據(jù)卡車的原理制造的，所以也叫卡車裝載機(jī)，他們以內(nèi)燃機(jī)或帶有蓄電池的電動(dòng)機(jī)為動(dòng)力。當(dāng)裝上鏟斗或抓斗時(shí)，可用語裝卸松散和小塊物料，叉架機(jī)構(gòu)使這些裝載機(jī)能適于把貨物舉升到一個(gè)不大的高度，有時(shí)也適于建筑安裝工程。叉車的主要工作裝置是用于裝卸整件貨物的叉子。卸載機(jī)分為機(jī)動(dòng)卸載和氣動(dòng)卸載機(jī)。行走速度快，對(duì)公路路面和存活地面從不產(chǎn)生破壞作用。履帶行走式裝載機(jī)具有良好的通過性，能產(chǎn)生很大的推進(jìn)力。多斗裝載機(jī)用于大型倉庫、公路工程以及需要連續(xù)作業(yè)的工作。鏟斗裝載機(jī)分為單斗裝載機(jī)和連續(xù)作業(yè)多斗裝載機(jī)。實(shí)踐證明，在采石場(chǎng)和非金屬材料的倉庫作業(yè)中，挖掘機(jī)的裝在效率要比裝載機(jī)高。西 南 交 通 大 學(xué)本科畢業(yè)設(shè)計(jì)（論文）外文資料及翻譯年 級(jí): 2007級(jí)學(xué) 號(hào): 20077657姓 名: 王雪揚(yáng)專 業(yè): 工程機(jī)械指導(dǎo)老師: 李 春 林2011年 5 月13 / 13 Loading machines For materials handing in construction,use is made of has shown that excavators are less effective in the capacity of loads in quarries and storages of nonmetallic materials than loaders.By the kind of loads handled,loaders are classified as forklift loads and scooping loaders for loose loaders are divided into singlebucket and continuousaction Multibucket loaders are generalpurpose machines suited engineering and in applications requring continuous working process. Depending on the kind of running gear,crawler and loaders have a high passblibity and develop a great thrust
規(guī)章制度相關(guān)推薦
鄂ICP備17016276號(hào)-1