機(jī)械設(shè)計外文翻譯--氣動馬達(dá)及工具-機(jī)械設(shè)計-展示頁
2025-05-26 23:41本頁面
【正文】 hrust 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 truck therefore they are also called truck are powered by internal bustion engines or electric motors with storage batteries. Engine powered truck are used for large warehouse and stockhanding application, for general yard work and fpr loading and unloading of vehicles. Torque converter transmission provides smooth operation。 power steering and allweather cabs are options available. 3 Singlebucket loaders have a crawler tractor or a wheeled truck as a carrier mounting. The loader permits mechanization of loading construction and erection and work with the aid of change attachments,of which the main one is the bucket. The loading equipment is available in three modifications: frontend,overloading, and halfswing,jibtype. The frontend attachment provides also side overloading modifiactaion permits back unloading. Presently frontend loader with the positive displacement hydraulic drives for the attachment are most widely used. The output of multibucket loaders is 40 to 60 percent higher than of singlebucket machines at the same power rating,it is expedient to use them in brickyards,prefabricated concrete products plants,railway stations with large volumes of loadingunloading operatins and also for loading loose addition,they are suited for size grading of loose materials,for which purpose they are provided with special vibrating screens. Multibucket loaders are very efficient in unloading flatcars with side dumping of the handle loaders can be applied in the production lines of prefabricatde ainstruction products plants and also in road the latter case they are used for loading sand and gravel into drying drums and mixers. The working member of the loader is a screw feeder consisting of tow righthand and lefthand screws,which are arranged on both sides of a bucket the feeder rotates,the loaded material is delivered to the buckets to make the scooping scraper is secured underneath the screw elevator of the multibucket loader usually dischanges the material onto belt conveyers that deliver it to tiansport facilities. Some loaders discharge the handle material into tranport facilities through hoppers or chutes. 4 裝載機(jī) 在建筑施工中，材料的裝卸是用裝載機(jī)和寫在機(jī)進(jìn)行的。 根據(jù)所裝載材料的種類，裝載機(jī)可以 分為叉式裝載機(jī)，用于裝在整塊物料；鏟斗式裝載機(jī)，用于裝載松散物料。單斗裝載機(jī)式通用機(jī)械，適用于多種條件下作業(yè)。 按照行走裝置的類型，可以分為履帶行走裝載機(jī)和輪胎式裝載機(jī)。輪胎裝載機(jī)機(jī)動性能良好。 裝載機(jī)用來卸掉火車車廂里的砂子、礫石、碎石和水泥。既定卸載機(jī)用于從平板貨車或 敞蓬車上卸貨；氣動卸載機(jī)用于卸水泥。這些裝載機(jī)有不同的換裝部件。 因為叉車在硬路面上作業(yè)，因此，主要用于倉庫并作為工廠物料的裝卸設(shè)備。 以發(fā)動機(jī)為動力的卡車用于大型倉庫和材料搬運(yùn)工作，用于一般的堆放場和車輛裝卸。還可以選 配動力轉(zhuǎn)向及全天候駕駛室。該裝載機(jī)可使裝載作業(yè)、建筑施工、安裝工程實現(xiàn)機(jī)械化。裝載設(shè)備有三種不同的形式，即前卸式、翻轉(zhuǎn)式和側(cè)卸式。 目前，具有變量液壓驅(qū)動的工作裝
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