Brief introduction to the function of strapping steel strip tension control system

Brief introduction to the function of strapping steel strip tension control system
　　 In the strip steel production process, it is often required to control the tension of the steel strip (for example, during heat treatment in a heat treatment furnace). Therefore, high precision and constant tension control requirements are put forward for the continuous production of thin strips.
　　 gives the principle of the steel belt tension control hydraulic servo system.
　　In the steel belt tension control hydraulic servo system, the steel belt tension in the heat treatment furnace is determined by the steel belt traction roller group 2 and the steel belt loading roller group 8. The DC motor M1 is used for traction, and the DC motor M2 is used as the load to create the required tension. If the position of a certain component in the adjustment system is used to control the tension, due to the large inertia of each component in the system, large time lag, and low control accuracy, it cannot meet the requirements, so a hydraulic servo tension control system is installed between the two roller groups. control precision. Its working principle is: force sensors are installed on the left and right sides of the steering roller as detection devices. The average value of the signals detected by the two sensors is compared with the given signal value. When there is a deviation signal, the signal is After the electric amplifier is amplified, it is input to the electro-hydraulic servo valve. If the actual tension is equal to the given value, the deviation signal is zero, the electro-hydraulic servo valve does not output, the hydraulic cylinder remains stationary, and the floating roller does not move. When the tension increases, the deviation signal causes the electro-hydraulic servo valve to have a certain amount of opening and supply a certain flow rate, so that the hydraulic cylinder moves upward, and the floating roller moves upward to reduce the tension to a certain value. On the contrary, when the tension is reduced, the generated deviation signal causes the electro-hydraulic servo valve to control the hydraulic cylinder to move down, and the floating roller moves down to increase the tension to a certain value. Therefore, the system is a constant force control system. It ensures that the tension of the steel belt meets the requirements and improves the quality of the steel.