常用的卷扬机有JJK快速卷扬机和JM慢速卷扬机两类。前者的额定牵引力在5-80kN之间,钢绳平均运行速度为28-40m／min,绳径7.7～26mm,建筑工地使用的龙门提升架就是这类卷扬机带动的。后者的额定牵引力在30～500kN之间,钢绳平均运行速度为8～12m／min,绳径15～65mm,由于牵引速度慢、吊装平稳可靠,常用于各种构件的吊装或拖曳、预应力钢筋的冷拉加工 Common winches have JJK fast winch and JM slow winch two categories. The former rated traction between 5-80kN, average speed of steel wire rope is 28-40m / min, rope diameter 7.7 ~ 26mm, gantry crane used in construction sites is driven by such winch. The latter rated traction 30 ~ 500kN, the average running speed of steel wire 8 ~ 12m / min, rope diameter 15 ~ 65mm, due to slow traction, hoisting smooth and reliable, commonly used in a variety of components such as lifting or towing, pre Cold-drawn steel processing