機(jī)械設(shè)計(jì)外文翻譯--氣動(dòng)馬達(dá)及工具-機(jī)械設(shè)計(jì)-全文預(yù)覽
【正文】 d stalling form an overload without damage. Rock drills and paving breakers The second class of airoperated tools include various types of rock drills and pavement hammers drills is monly used airoperated tool in mining and genera excavation work. A piston can be fund inside the air cylinder, and adrill steel in used. The drill steel is provided with a shank on one end and a bit at the other end . the freely moving piston hammers or strikers rapid 10 blows on the shank of the drill steel. Paving breakers are handoperated pneumatic tools that have a wide variety of uses in industrial plants and in general construction work. One type of tool is valveless。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。刮板固定在螺旋給料器的下方。多斗裝載機(jī)可用于混凝土預(yù)制品廠(chǎng)的生產(chǎn)線(xiàn)中，也可用于筑路。 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%。在這些換裝裝置中，主要附件是鏟斗。液力變距傳動(dòng)系統(tǒng)使運(yùn)動(dòng)平穩(wěn)。當(dāng)裝上鏟斗或抓斗時(shí)，可用語(yǔ)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。 卸載機(jī)分為機(jī)動(dòng)卸載和氣動(dòng)卸載機(jī)。履帶行走式裝載機(jī)具有良好的通過(guò)性，能產(chǎn)生很大的推進(jìn)力。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)。1 本科畢業(yè)設(shè)計(jì)（論文） 外文資料及翻譯 年 級(jí) : 2020 級(jí) 學(xué) 號(hào) : 20207657 姓 名 : 專(zhuān) 業(yè) : 工程機(jī)械 指導(dǎo)老師 : 2020 年 5 月2 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 efftort. Wheeled loaders feature a high manoeuvrability and high traveling speeds making no damage to the road pavement and the storage areas. Unloaders are used for unloading sand, gravel, crushed stone, cement form railway cars. Power and pneumatic unloaders are used,power for unloading materials from flat cars or gondola cars(open wagons)and pneumatic for unloading cement. The main working member of forklift loaders is the fork serving to load and unload piece loads. These loaders have different change attachments. When equipped with buckets or grabs, they are used for loading loose and smallpiece materials, and the boom attachment makes these loaders suited for hoisting loads to a small heighe and sometimes for erection work in construction. Forklift loaders are operated on hardpavement areas,therefore they are mainly used in storehouse and as factory materialshanding are made on the basis of a tru
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