刮板输送机外文翻译文献Word文档格式.docx

1、刮板输送机外文翻译文献#刮板输送机外文翻译文献#（文档含中英文对照即英文原文和中文翻译）#Mine scraper conveyor soft-start mode#of selection and application # High yield and high efficiency in the coal mine fully mechanized coal face of the building, to face big-long, large to support the requirements of the power of Shearer and scraper convey

2、or. Ordinary fully mechanized coal face of the long-general in about 150 m, scraper conveyor transport capacity of 500 t / h around high yield and high efficiency and fully mechanized coal face of the long-General to 180 300 m, scraper conveyor transport capacity of 800 t / h and above, therefore, c

3、onveyor power greater growth. Pingdingshan Coal Mining Group Company to as an example, the scraper conveyor of power in most 400 （2 # 200） kW and above, the largest for the 750 （2 # 375） kW. Scraper conveyor to the start-up launched mainly two-speed, limited by a small number of filling hydraulic co

4、upler, which started two kinds of ways, not only operating costs, and it stands high. Therefore, the need to seek new technology and equipment to meet the requirements of high yield and high efficiency. #一、current situation and existing problems #（一） limit filling hydraulic coupler in the high-power

5、, big load, its size, when it with the motor and reducer connection, the greater the share of space. Limited space in the work of the occasion, too much volume will scraper conveyor layout difficult. Coupled with increased hydraulic transmission distance and high-speed rotating state and easy to hav

6、e a greater impact on the radial dynamic load, and the slowdown caused by electrical installations damaged. Coupled with the input and output speed than the speed of usually no more than 97 percent, that is impossible to achieve input shaft and output shaft of sync, which must exist greater power lo

7、ss, reducing the efficiency of the transmission system. #（二） two-speed motor drive system is currently in China#s mining scraper conveyor in common. Under normal circumstances, the rated speed motor to start the half, corresponding to start motor power is also rated power of the half. To low-speed m

8、otor launch, when the completion of the process initiated after the switch to high-speed operation, from start to the normal operation of sub-levels, in part, reduce the impact of the launch. In this way to use the special two-motor winding, two-and two-speed cable root switch. Two-speed motor compl

9、ex structure, high cost, power supply system equivalent to two Motors, low-speed switching not effectively controlled, the point of failure, equipment cables, at the same time, the fault lines will be doubled the increase. #二、soft-start several advanced methods of comparison #（一） thyristor surge sof

10、t-start mode. Start the process launched at the slope, pulse conflict jump start, speed up the slope, fast slope. Pulse conflict way can jump start the biggest short-term output of over 95 per cent of the rated voltage, to impose a short-time great starting torque （equivalent to 90 per cent of direc

11、t starting torque）, to overcome the static friction and the inertia of the transmission system. This soft-start approach and broad prospects for application. #（二） viscous liquid transmission soft-start mode. Dodge is a typical U.S. company CST （consecutive start transmission） soft-start devices. CST

12、 soft-start devices currently relies mainly on imports, high prices, the general mine unbearable. CST-mechanical, hydraulic, electronic control, cooling, materials for integrated, manufacturing, high-precision control, supply of spare parts in particular inconvenience. Scraper conveyor is moving equ

13、ipment, changing work environment, the extremely bad conditions, equipment failure rate correspondingly increased, the greater difficulty of maintaining the higher operating costs and narrow work space constraints of the CST in China mine AFC Machine applications. #（三） Frequency soft-start mode. Scr

14、aper conveyor used, its performance advantages not play;# expensive, the general mine unbearable;# components used its power IGBT modules, high-voltage IGBT module of the international embargo on China, so its difficult to voltage levels To 1140 V, to its coal mine conveyor on the application has br

15、ought great difficulties. # （四） SRM-driven approach. SRM is a new driver, in other sectors （such as the textile industry, machinery manufacturing, washing machines, etc.） have a very wide range of applications. The main feature is activated when the current low torque, speed performance, and easy to

16、 use pure electric control to achieve stepless speed regulation, and long run. Motor exclusive use of SRM, but flow, not burning motor, with good prospects for development. Components used for power IGBT module, it is very difficult to achieve voltage 1140 V. The current high-power explosion SRM is still in the development stage, the bulk smaller, higher cost, not suitable for the underground mine scraper conveyor application. #（五） soft-start mode. Taiyuan, t