拉紧装置选择（Tightening device selection）.docVIP

拉紧装置选择（Tightening device selection）The type of tensioning deviceThe common tension device is a screw tensioning device, gravity tensioning device, fixed winch tensioning device, automatic tensioning device, etc.1 spiral tension device. Screw tension device has simple structure, tension is too small, only applies to short conveyor, generally the captain is less than 80 m to choose, the disadvantage is that after the tape to elongation, does not automatically taut.2 gravity tensioning device. The gravity tensioning device is the simplest and most widely used kind of tensioning device. It makes use of heavy hammer to pull tight automatically, because the heavy hammer is pulled tight by itself, so it can guarantee that the tension force is constant in various working conditions and can automatically compensate the elongation of the tape. Of gravity tension device is characterized by constant tension force, strain displacement variable, it is suitable for fixed long-distance transport, advantage is of high reliability, the disadvantage is that tensioning force cant adjust, space requirements, where the space is restricted, cannot use.Fixed winch tension device. Fixed winch tensioning device is used to tighten the small winch, the winch usually USES worm gear reducer to drive the drum to coil the steel rope, and tighten the belt. The advantages of the tensioning device are small size and large tensile force, so it is widely used in underground belt conveyor. Downside is that it can only according to the need of tensioning force produced after setting a fixed tension force, tension force can not automatically adjust, when occurrence problem of winch and the control system, the adhesive tape machine cannot produce constant tension force or tension force failure, safety and reliability is relatively lower.Automatic tension device. The automatic tension device can adjust the tension force according to the pulling force of the active roller, and it can also compensate the elon