综采工作面重型刮板输送机采用双速电动机驱动后,有效地解决了重载难以启动、液力联轴器喷油等问题,但是由于为之配套的双速开关经常出现故障,因而造成双速电动机烧毁现象频繁发生。为此,我们采用现在综采工作面普遍使用的徐州双保护型低压真空磁力启动器对多个不同型号的刮板 Full-mechanized mining face heavy scraper conveyor driven by two-speed motor, effectively solve the heavy load is difficult to start, the hydraulic coupling fuel injection and other issues, but because of the accompanying two-speed switch often fails, resulting in Two-speed motor burned frequently occur. To this end, we are now using fully mechanized coal face Xuzhou double-protected low-voltage vacuum magnetic starter for a number of different types of scraper