POB Magnetic Powder Brake 


 


Attention for Using Magnetic Particle Brake :


 


1, Install it with correct mounting method (make high-speed rotation side as the input side) to use the magnetic powder clutch. If the mechanical structure of output and input shafts have to be installation reversely, make sure to use the under 1000R/MIN. If the output shaft and input shaft be installed reversely, which will make the machine idle for a long time,  the magnetic powder clutch will greatly shorten the life by mixing magnetic powder. 





2, Note the moisture. If the magnetic is damp, then performance will become unstable, so be careful do not to let the oil or water get into the housing. Especially when installed in the gear box, oil penetrated the internal branch of the housing through the shaft, so please seal it with film completely.


3, Note the surface temperature. Caused by continuous operation, the maximum temperature of the surface is below 90 degree when running more, than the value and durability will be greatly reduced. Make sure to limit the temperature will not above90 degree, make sure to keep the use of sliding within allowed work range.

Magnetic Powder Brake Note 





Don’t overload, meanwhile cool to appropriate temperature






The value of the torque/rotational speed/slip power should be less than the rated value. The cooling mode(natural cooling/forced air cooling/water cooling) should depend on the maximum slip power when it works and the cooling air should pass the water and oil filter. The temperature detector and the alarm should be installed to prevent high temperature which can affect the service life of the magnetic powder.(the highest temperature is 80 degree).

Structure and working principle





The magnetic powder clutch is composed of

active rotor (input shaft) and Yoke with excitation coil. The three parts are

assembled relative concentric and form a system which can rotate relatively.

The annular gap between active rotor and driven rotor is full of alloy powder

which has high magnetic conductivity.






 






The magnetic powder will be in the state of

loose when the current do not pass the excitation coil. The magnetic powder

will be thrown on the inner wall of active rotor. In this case, there will not

exist the interaction force between the active and driven rotor. So the

magnetic powder clutch is in the state of separation, no torque transmission

exits.






 






The magnetic powder in the working chamber

will link in a link state under the action of the magnetic flux generated from

the Yoke when the current pass the excitation coil. The magnetic powder clutch

can transfer torque relying on the shear force generated from magnetic chain

and the friction generated from the magnetic powder and working face. In this

case, the magnetic powder clutch is in the state of combination.






 






When the current is cut off, the magnetic

flux will disappear with the disappearance of the magnetizing current, the

magnetic powder will be in the state of loose under the action of gravity

again, and will be thrown on the inner wall of active rotor under the action of

the centrifugal force. In this case, the magnetic powder clutch will be in the

state of separation again.






 






The magnetic powder clutch and brake have

the same principle, the magnetic powder brake will form as long as the driven

rotor of the magnetic powder clutch is fixed.