雙塔俯仰式纜機英文文獻翻譯-免費閱讀
【正文】 不同的槽深也就意味著不同的圓周速度，這必定會導(dǎo)致更大的纜索滑動，因此對內(nèi)套的磨損更大。在整個同步過程中必須按住按鈕不放。 跑索終端的各個限位開關(guān)通過電動方式最終停止纜車橫移。安裝好后 ,對限位開關(guān)進行設(shè)置，以保證纜車能在到達塔機前 130m 時停止或在到達計數(shù)器前 110m 時停止。運行小時計數(shù)器監(jiān)測纜車橫移馬達目前工作的時間，工作循環(huán)計數(shù)器監(jiān)測橫移運行的次數(shù)。由于物理原因，加速不應(yīng)大幅度超過 ,各自的路徑約為 在 12s 后停止，另外用機械制動時，由于制動負荷的 不同還會導(dǎo)致更短的制動時間。 有三種可能的方法來控制絞盤。將要在工地使用的纜索起重機屬仰俯式，也就是說，它之所以被稱為仰俯式是因為移動跑索時，起重塔或起重桅桿必須向上游或下游仰俯。s Republic of China. The cable cranes, representing the main transport facility of a dam construction jobsite, have been designed for the purpose of transporting concrete, formwork items, concrete prefabitems, reinforcing material, building machinery and machine ponents such as penstocks, generators, lock gates, etc. . The cable cranes that will be used on the jobsite are of the luffing type, i. e. it has been given that name because for moving the track rope, the towers or masts one have to luff to the upstream or downstream direction. Both the slewing masts of each single crane between which the track ropes are installed, are situated at an elevation of + 185 m on block 8 already concreted on the left bank and on the longitudinal coffer dam at the elevation of + 160 m. Each mast has a height of 125 + 25 = 150m, and is firmly anchored by rear stay ropes in longitudinal direction. On their sides, the masts are held respectively moved by 6strand luffing ropes actuated by winches. The spans are: Rear stay ropes on the left bank approx. 270m Rear stay ropes on the right bank approx. . Track ropes: approx. 1416m The machine houses for the winches of the cranes are arranged on the foot of the masts. In the machine houses on the foot of the head towers are arranged the winches for hoisting crab traversing and mast luffing. In the machine houses on the foot of the tail towers are only situated the winches for mast luffing . This machine houses are therefore called luffing winch house . The control electronics are each located in separate rooms, for thus avoiding any problems as might occur by dust or also temperature variations. There are three possibilities to control the winches. Normally the crane is controlled by the driver39。 at the shaft of which is also fitted :the screwtype limit switch and the position indicator, just also the tachometers for measuring the speed and for control of a possible over speed. Although the screwtype limit switch and the position indicator are driven by the nondriven return pulley, it is unavoidable that after a duration of operation occurs a certain missindication, so that the correction will have to be made (see chapter Traversing Limit Switches and Position Indicators). For safety reasons have been i
畢業(yè)設(shè)計相關(guān)推薦
鄂ICP備17016276號-1