The start/stop action of many conveyor and other material-handling equipment applications shortens the life of many of the motion control components, such as motor brakes. One way to combat this issue is to choose motor brakes that use oil shear technology, such as the MagnaShear™ motor brake.
With oil shear technology, a layer of automatic transmission fluid flows between the brake disc and the drive plate. As the fluid is compressed, the fluid molecules shear, imparting torque to the other side. This torque transmission causes the stationary surface to turn, bringing it up to the same relative speed as the moving surface. Since most of the work is done by the fluid particles in shear, wear is virtually eliminated. The oil shear also provides a smooth “cushioned” stop, which reduces shock to the drive system and can extend the service life of downstream components.
In MagnaShear’s case, a patented fluid recirculation system also dissipates heat and continually lubricates all brake components.
These motor brakes suit applications where the motor is reversed each cycle, such as loader/unloader conveyors, rail car spotters and dumpers, ship and rail car loading conveyors, trippers, and pallet-return conveyors. They are also well suited for cranes, winches and other material handling equipment.
The totally enclosed MagnaShear™ brakes are impervious to moisture, dirt and dust. Spring set torque ratings are available from 3 to 1250 ft-lb. The motor brakes can be sized to the correct torque independent of the motor frame size or horsepower.
The motor brakes have “quick mount” features for fast and easy mounting to drive motors in NEMA frame sizes 56 to 449. They are also available pre-mounted on a motor for severe duty applications. They can be furnished to fit a NEMA or IEC frame motor, as a complete motor and brake assembly, or to mount on a machine frame or other special mounting configuration.
Force Control Industries
www.forcecontrol.com
::Design World::
Filed Under: Brakes • clutches, Conveyors, Material handling • converting, Motion control • motor controls