刮板输送机外文翻译文献.doc

外文文献翻译 () 英文原文 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 conveyor. 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, conveyor 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 coupler, 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, 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 have 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 loss, reducing the efficiency of the transmission system. (二 ) two-speed motor drive system is currently in Chinas mining scraper conveyor in common. Under normal circumstances, the rated speed motor to start the half, correspond