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1、翻译部分英文原文The present and future development of belt conveyerAbstractThis paper analyzes the present and future development of domestic and overseas about belt conveyer，especially，heavy belt conveyer（include trend analysis of the belt conveyer and monitoring technology），equipment function，reliability
2、and life，expounds the developing trend of belt conveyer.Key words：belt conveyer； present； future development1 Belt conveyor technology, the status quo abroad Conveyor technology abroad soon, and its mainly manifested in two aspects: on the one hand, the function of conveyor diversification, expansio
3、n of the scope of application, such as high angle conveyor, tube conveyor, space models such as turning conveyor; conveyor itself on the other hand, the technology and equipment has been tremendous development, especially long-distance, large capacity, high-speed large-scale conveyor belt has been b
4、ecome the main direction of development, the core technology is the development and application of the conveyor dynamic analysis and monitoring technology, enhancing the operation of the conveyor performance and reliability. At present, the use of coal mine belt conveyor shown in table 1 has reached
5、 the major technical indicators, the key technology and equipment has the following characteristics: (1) Large-scale equipment. The main technical parameters and equipment toward the large-scale development to meet the annual production capacity of 300 to more than 5,000,000 t of intensive high-yiel
6、d production of high-performance needs. (2) The application of dynamic analysis techniques, and mechanical and electrical integration, computer monitoring Control, such as high-tech, using high-power soft-start and auto-tensioning technology, dynamic conveyor monitoring and control, greatly reduced
7、the dynamic tension of the conveyor belt, equipment performance, and high transport efficiency. (3) The use of multi-machine-driven and power-driven and middle-balance to the operation of conveyor technology changes, so that run the length of a single conveyor has unlimited in theory, and to ensure
8、that the common carrier system equipment, and interchangeability and reliability-driven unit. (4) New, high reliability, the key technology components. Such as the CST, including include a variety of advanced high-power-driven devices and speed control devices, high-life high-speed roller, roller-ty
9、pe by itself devices with high-performance storage devices, the rapid shift from the tail and so on. FSW production such as the United Kingdom FSW1200 / (2 3) 400 (600) face conveyor trough the introduction of a liquid or viscous differential frequency converter, transport capacity of 3 000 t / h or
10、 more, its reproduced in the tail with the new machines (such as the United States produced by Joy S500E) matching can be automatically goes with the face changed rapidly since, manual less, manufacturing and high efficiency .Tab.1 The main technical parameters of belt conveyer in overseasThe Main p
11、arametersTelescopic belt conveyor troughDistances / m2000-3000More than 3000Speeds/(m/s)3.5-44-5,the top is 8Transport numbers/(t/h)2500-30003000-4000power-driven/kw1200-20001500-3000，the top is 101002 Domestic conveyor technology, the status quo Chinas production of varieties of belt conveyor, type
12、 more. In the Eighth Five-Year Plan period, through the national one-stop Nissan 10,000 tons fully mechanized mining equipment project, the skill level of conveyor greatly improved coal mine with high-power, long-distance belt conveyor The key technology research and new product development have mad
13、e great progress. Such as the long-distance belt conveyor inclination complete sets of equipment, high-yield high-performance scalable face conveyor trough filled the gap, etc., and the key technology of belt conveyor components and its main research and theoretical product development, successfully
14、 developed a wide range of soft start and braking device and the PLC as the core of the programmable electronic control devices, variable speed drive system using fluid couplings and planetary gear reducer. At present, Chinas coal mine belt conveyor with the main technical characteristics of indicat
15、ors as shown in table 2.Tab.2 The main technical parameters of belt conveyer in ChinaThe Main parameters300-500 million t / a high efficiency coal mine in ChinaTelescopic belt conveyorDistances / m1000-20001000-4000Speeds/(m/s)2-3.52.5-4Transport numbers/(t/h)800-18001000-2000power-driven / kw250-75
16、0750-15003 Conveyor technology gap between domestic and foreign Large belt conveyor 3.1 key core technology gap (1) Belt conveyor Dynamic Analysis and long-distance monitoring technology, the key to high-power conveyor technology is a dynamic design and monitoring, it is the constraints of large-scale conveyor core technology development. Chinas use of rigid conveyor t
