How do centrifugal clutches and brakes work?
Centrifugal clutches and brakes use centrifugal forces to transmit power (clutch) or to limit speed (brake). As the brakes are based on a physical principle, centrifugal clutches or brakes do not require any additional external power supply, which makes them perfect solution for safety applications.
Centrifugal clutches and brakes consist of a driving shaft (point one on the image). Around the driving shaft, there are flyweights (point two) mounted, which are kept on the shaft by springs (point 3). On the outer side of the flyweights there are friction pads (point four).
Point one - when the driving shaft starts turning, the flyweights and the friction pads are kept together by the retaining forces of the springs.
Point two – at the predefined speed (engagement speed), the centrifugal forces overcome the retaining forces of the springs and the friction pads do contact the outer drum (point five).
Point three – the friction pads begin to transmit power to the drum, but will show a slipping effect until the speed is further increased to the operating speed, which means a non-torque transmission.
Based on long experience and knowhow, SUCO designs the clutched with a safety factor, which guarantees that the transmissible torque at the operating speed is higher than necessary. This ensures a slip free application and thus, reduces wear and service requirements.