The magnetic powder clutch, brake is based on the electromagnetic theory and the magnetic powder to transfer torque, the torque and excitation current is basically linear relation. Therefore, as long as the change in the value of the exciting current, can easily control torque. Under normal circumstances, in 5% to 100% of rated torque range, torque excitation current and the transfer of proportional linear relationship.
Stable slip torque
When the excitation current is kept constant, no torque acceptor transmission parts and follower between differential (sliding speed, check) is static and dynamic moment indifference. It can generate stable torque constant. This feature is used for tension control, only need to adjust the excitation current size, can accurately control the required torque, which is simple, effective to control the coiling tension objective.
The scope of application
The magnetic powder clutch, brake with the above characteristics, has been widely used in papermaking, printing, plastics, rubber, textile, printing and dyeing, wire and cable, metallurgy and other relevant coiling processing industry in the reeling and winding tension control. In addition the magnetic powder clutch can also be used for buffer starting, overload protection, control etc.. Magnetic powder brake was also often used in mechanical transmission and brake dynamometer.
Selection
Selection of magnetic powder clutch, brake with maximum torque required as the basis to select, and also note that the actual slip power should be less than the magnetic powder clutch, brake allowable sliding power.
In the absence of transmission case, rated torque, maximum torque winding material product required and the maximum radius of winding should be less than the magnetic powder brake in addition, a magnetic powder clutch choice but also its position; in the slip power matching under the premise, the clutch on the high level, you can choose the smaller size of the clutch the size, cost, decreases. When the small size does not match and the clutch, clutch, transmission mechanism should be placed in the middle or back, in order to increase the working torque reduction of slip speed.
The magnetic powder clutch, brake cooling conditions, the slip power is constant, so the actual working torque and speed can compensate for each other, namely the slip speed increases, the allowable torque decreased, but the highest speed shall not be more than the allowable speed.
1, please pay attention to moisture. Magnetic damp words, performance will become unstable, so be careful, don't let the oil or water penetrated inside.
Especially when installed in the gear box, the oil branch through the shaft part penetrated inside, so use film completely sealed.
2, please note that the surface temperature. The highest surface temperature caused by continuous operation for operation below 90 degrees, more than the value, durability will be greatly reduced. Please be sure to the boundary temperature as the standard, when use must keep on the sliding work acceptable rate.