In many paper mills, color printing mills, weaving and dyeing factories, wire and cable factories, metal foil processing plants and other winding process in the production process, the tension control instrument is used to deal with a number of such as paper, cloth, wire, metal foil, film and other materials and products, when the material and discharge to the tension control instruments.
A complete set of tension control system, its basic components include controllers, clutches and brakes. Tension controller can be divided into manual control and automatic control, manual controller that is the current stabilized power supply is based on the change of receiving or discharging roll diameter and manually adjust the clutch or brake excitation current in stages, so as to obtain a consistent tension, automatic tension controller is by the tension detector to directly determine the tension of the roll material, and then the tension data is processed and then go to automatic adjustment of the clutch or brake excitation current to control the tension of the roll material.
The tension control device is used to measure the tension of the web directly by the tension detector.
Reeling: the tension of the reel is controlled by the braking torque of the magnetic powder brake in the reeling device, with the continuous reduction of the coil diameter of the coiled material must be constantly reducing the braking torque, the figure uses the tension detector to detect the tension of the coiled material, the tension control instrument automatically controls the torque of the magnetic powder brake, so that the tension is constant. Winding: the winding speed is normally faster than the linear speed of the material, so the magnetic powder clutch works in the slip state, the tension is controlled by the magnetic powder clutch torque, in order to keep the tension constant, it is necessary to increase or decrease the magnetic powder clutch torque according to the size of the winding diameter.