【導(dǎo)讀】裝長(zhǎng)達(dá)52千米的螺紋槽系統(tǒng)（2個(gè)）。在1795年時(shí)，最初的帶式輸送機(jī)不便于操作，而且僅涉及一些簡(jiǎn)單的外形，進(jìn)導(dǎo)輪系統(tǒng)用滾動(dòng)摩擦來替代滑動(dòng)摩擦，以便減少傳送中的摩擦損失。草型帶式輸送機(jī)以及鋼絞線帶式輸送機(jī)都獲得較大發(fā)展。但在1900年早期，所有的槽形帶式輸送機(jī)都具有相同的外型，在外型上并沒。輪式運(yùn)行中的水平傳送帶被鋼絞線替代所產(chǎn)生的困難。第二步改變是著眼于鋼絞線。傳送帶和貨物之間的摩擦力，這應(yīng)使得傳送帶制動(dòng)器僅僅牢固在主動(dòng)鋼絞線上。21，一些特殊形式的可達(dá)28，在傳動(dòng)鋼絞線上不存在打滑脫落的現(xiàn)象。后期的鋼絞線帶式輸送機(jī)設(shè)計(jì)理念與傳統(tǒng)的非常相似的，在傳送機(jī)中也存在摩擦，關(guān)于摩擦損失已經(jīng)證實(shí)往往很難克服，并且所有的觀。鋼絞線傳送帶被定義為橫向堅(jiān)固縱向。輕柔的帶式輸送機(jī)，而從動(dòng)帶依附于兩條平行主動(dòng)帶的側(cè)翼或邊緣部分。此外，每一根主動(dòng)鋼絞線在工作中允許承受不同的拉伸力。主動(dòng)鋼絞線承重100噸時(shí)，每一部分都是如此。

　　

【正文】 ndred hours of running could be eliminated during manufacture but it conveniently provides the necessary space for splicing of the cable as well as generating extra cable which can be used when resplicing is necessary The choice of the modulus that governs the elastic stretch is a promise between minimising the stretch to reduce the space requirements and having sufficient stretch to ensure very low 39。breakaway39。 torques. As can be seen from the foregoing information the Cable Belt system while fulfilling the same role in many ways is quite different from the troughed belt conveyor. As most conveyors are of short length and low horsepower there is no doubt that the troughed belt conveyor is the correct solution for many conveyor applications. However in those areas of long lengths or high lifts the Cable Belt system often shows decisive advantages and in those cases where its unique design concepts can be used it may be the only choice. To define the precise applications which a Cable Belt system is suitable for is difficult, as nearly one third of the systems installed are in applications in which they were not the most petitive solution. In each case they were chosen for one of the unusual features that the system offers. As a general rule the Cable Belt in its current form is not technically suitable for short centre conveyors mainly due to the size of the terminals. In addition to the cost of the terminal equipment the main cost ponent of any belt conveyor, the belt, in the Cable Belt system has a constant cost irrespective of the power requirements. This 1oads the capital cost on low power conveyors but reduces it on high power conveyors in parison with a troughed belt conveyor. In summary the current petitive situation of the Cable Belt system appears to be : In slope conveyors of less than 750 kW or level conveyors of less than 3000 metre length the Cable Be1t is not the most petitive solution. Above these parameters the Cable Belt bees increasingly petitive in capital cost. In leve1 conveyors where the power due to friction losses is a substantial part of the total, the operating costs of the Cable Belt system are being increasingly attractive. In other cases there does not appear to be any significant differences. There is one significant development of the Cable Belt system which is currently undergoing field trials. When generally available in the next few years it should, for the same capital cost, show a significant reduction in operating costs. This involves the production of a drive cable where the individual wire reinforcing strands are separately moulded within an elastomer giving a round steel and elastomer drive cable. Initial results have been most encouraging with a three fold increase in the fatigue life as against a conventional steel wire rope. Recent developments in the Cable Belt system show that it can effectively pete with rail transport over distances which until now have not been regarded as suitable for conveyor systems. As an example there is currently being constructed in Western Australia for Worsley Alumina Pty. Ltd. a two flight, 52020 metre Cable Belt conveyor system To be operated by Worsley Alumina Pty Ltd., and located near Perth., W. Australia, this installation incorporates two Cable Belt conveyors in tandem and is an overland system which transports crushed bauxite from the mine to a refinery. At the intersection of the two conveyors, the material is turned through 50176。 (to the left) by means of chutes and rock boxes and fed to the second stage Cable Belt conveyor. Both the conveyors are angle drive conveyors with their drive and tension units located at the transfer/discharge ends of each conveyor. To minimise spares holdings, the conveyors have been standardised with almost plete interchangeability of ponents. Length: 31000m 21000m Difference in elevation: (Fall) 72m 14m Material: Bauxite Density: (Specific Gravity) 1520 kb/m179。 Rated capacity: 2040 . Annual tonnage: 9,06 x 106 Belt width: 900 mm Operating speed: 6,35 m/sec Drive cable: 57 mm dia. Linestand pitch: 4,75 m Power: 5300 kW 3600 kW In conclusion it would appear that the Cable Belt system has the capability of further development which should permit, the expansion of belt conveying into even longer economic lengths than those currently under construction. The Author wishes to acknowledge the assistance given by Worsley Alumna Pty. Ltd., and the Cable Belt panies in the preparation of this paper. References: Conveying and Belt Elevators Hetzel and Albright John Wiley amp。 sons Fu11ing Resistance of Belt Conveyors . Lachman