Magnetic Powder Clutches And Brakes Are Commonly Used Actuators In Tension Control Systems

1. Magnetic powder clutch also has more significant cost performance
The pneumatic clutches and brakes commonly used in the slitter tension control system are: electromagnetic type, pneumatic clutch for grinding machine, pneumatic clutch for ball mill, magnetic powder type and pneumatic type. Electromagnetic clutches and brakes have some applications in small tension control systems, but because of the small torque control, the application range is also narrow. Magnetic powder clutches and magnetic powder brakes are commonly used actuators in tension control systems and are widely used in traditional small tension control systems. However, due to its own structure and nature, magnetic powder is prone to moisture for a long period of time in a humid environment (or when its climate and humidity is relatively high). At the same time, due to its structural and principle characteristics, magnetic powder sintering and rust are prone to occur during long-term work. , So that linear torque cannot be output. Moreover, when a large torque is to be output, the cost of the magnetic powder clutch and brake is also high. Pneumatic brakes and clutches should be said to be needed for the development of tension control. The magnetic powder clutch of Haian County Hangcheng Electromechanical Manufacturing Co., Ltd. has been widely used in various industrial links after continuous innovation: papermaking, printing, textile, coating, cutting, rewinding, slitting and other tension control systems, product torque The control range covers 2.2～36500 N·m. Not only will it never sinter and will not rust, but it also eliminates the residual magnetic torque of the magnetic powder brake during use. The linearity is more ideal and can better meet the heat dissipation power requirements during high-speed operation. Of course, when tension control requires a large torque output (such as paper, wide film and metal industries), pneumatic brakes and clutches also have a more significant price/performance ratio than magnetic powder clutches.

2. Product quality and cost
In the cutting process of paper, plastic, film, film, rubber, non-woven fabric, copper foil, aluminum foil, steel tape, aluminum tape and other coils, we must ensure product quality, production efficiency and reliability, and a complete set of functions The tension control system is a necessary condition. The general tension control system mainly includes tension controller, tension detector, brake and clutch. The brake and clutch as the terminal actuators in the entire system, the performance of the performance, the length of life, the difficulty of installation and maintenance directly affect the quality and cost of the product.

Preparation before using magnetic powder brake
Do not hit hard when the magnetic powder brake is transported. The magnetic powder being inserted will segregate to an indefinite position before use. If the driving side and the passive side have difficulty in turning, they can be tilted up and down, and the outer periphery of the yoke can be tapped to restore the shape.

Do not leave it in a place with high humidity for a long time. When setting, please make it too fine. When entering, put in the force shaft and tap on the corner. Please connect the input shaft and the drive shaft, and the input and output forces to the load shaft. If the input shaft is too thin, it will not reverse. In addition, the elastic shaft coupling must be used for the connection of the force shaft, and the concentricity and straight angle of the thin coupling must be too small. Please use it within the tolerance of the coupling.

   Please make sure that the thin wires are not enough to fight the turning part. Do not cover the ventilation window when installing the plate bracket during installation. When the atmosphere cools, the air pressure must be above the specified value. Before the formal operation or after the device moves, it must be operated symmetrically before the formal operation. Evenly symmetrical torque can be bred to produce a smooth and steady life. The principle of evenly symmetrical operation is as follows: In the non-excited state, the drive side rotates at a high speed (below 1800 rpm) for about 1 minute, and the excitation current is set at 1/4-1/rated. 5. On the one hand, it turns on the drive side, on the other hand, it opens in 5 seconds and closes in 10 seconds.

   During continuous sliding operation, please pay attention to the external temperature of the magnetic powder brake, which cannot exceed the maximum temperature. The natural cooling type should not be higher than °C. The axial fan and forced air cooling type should not exceed 70°C. Once the temperature rises above the boundary temperature, Will affect the durability of the magnetic powder brake.