工作面刮板輸送機(jī)技術(shù)現(xiàn)狀與發(fā)展趨勢(shì)畢業(yè)論文外文翻譯-文庫(kù)吧資料
2025-06-06 12:14本頁(yè)面
【正文】 per conveyor widely used vacuum smelting furnace of the more highquality lowcarbon steel alloy gear. Gear heat treatment using puter monitoring and control equipment carburizing atmosphere, and strictly monitor the furnace temperature, carbon potential, control gear and equipment parts used mainly CNC machining centers manufacturing, processing benefit substantially improve accuracy, domestic and foreign panies gear manufacturers in China can reach a GB100095 88 involute gear machining accuracy standard 665 level and above.3 China scraper conveyor direction of developmentWith coal mine production of intensive development, has a long wall face fully mechanized coal mining equipment and technology has been to the highend development, to meet the production capacity, a high degree of automation, safety and reliability of production requirements. At present, China39。s largest ring linked to φ42 mm 146mm pact chain, tensile strength of 2270 kN, the largest foreign ring linked to φ48 mm 152mm pact chain, tensile strength of 3550 kN. With the ring linked the increasing size of the central trough of higher and higher, conveyor magnificent performance declined, the gateway if not thorough cleanup will also affect passage of conveyor. So ring linked the direction of development is to improve tensile strength and reduce the high degree of Central legislation. Materials and Technology In order to improve the roundabout chain of tensile strength, the current foreign Grade C and Dlinked ring in the largesized materials with 23 MnNiCrMo54, 23MnNiCrMo54 and 23 MnNiCrMo64 scouring steel, tensile strength limit ≥ 1600 ~ 1800 MPa. Welding Technology: the use of advanced welding equipment, welding and the use of flash returns processing technology, successfully resolved the surfacing of the process of overheating, such as a burning issue. In quality testing, the use of scanning stretch fracture fracture of cables used to pretension ring linked to strengthen technology, greatly enhancing the carrying capacity and fatigue. form and geometry In 1985 the first to create a pany 38 mm 137mm flat chain. Flat is linked each of the chain is still ringCentral, Central was squeezed the flat ring. Flat chain link sliding work to reduce the size of the increase in the chain of slot pressure on the units and improve the legislation of the Central wear resistance。 ⑶ achieved a scraper conveyor loaded with empty and the smooth startup。⑺ scene debugging simple, it is easy to modify the parameters online and debugging. AC motor technology the main technical characteristics ⑴ and other softstart mode pared to the full realization of electrical softstart control, scraper conveyor drive system and power supply system to maximize the simplification。⑸ conveyor of all mechanical, electrical system overload protection, the protection system fast response。⑵ relative speed hydraulic coupler, the transmission efficiency。 ⑸ dualchamber design, pact, power transmission ponents without mechanical contact, high reliability.⑹ with water as a working fluid, safe and convenient and cheap, through pipes or water supply, drainage tube through the pump row, row of pressure from the main hydraulic motordriven cycle produced by the pilot of the portfolio directly to the valve To control the water cycle。 ⑶ through hydraulic coupler divisions will also reorder the multidrive can be achieved under the load balancing。 sprocket using highstrength alloy steel, of quenching the hardness to eat HRC55, effective hardening depth of 10 mm and above, the service life of up to 400 to 5 million t of the media. In addition, from sprocket on the tooth to be improved, for example, a pany design the GRsprocket and there is great difference between conventional sprocket, which always has three sprocket tooth led the entire load. 3 tooth contact will inevitably reduce the wear chain and sprocket, thereby extending the life of the chain and sprocket, reducing the chain elongation, power transmission efficiency is higher. Softstart devices Foreign advanced conveyor transmission use of softstart technology, in scraper conveyor on the successful use of the softstart main valve control devicefilled hydraulic coupler, CST controllable start and the exchange of electrical transmission system, such as Frequency Control . Because there is no domestic mature technologies and pr
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