Electromagnetically operated friction disc coupling esp. for driving fan wheel in IC engine - rotates wheel with direct rpm of driving pulley across first electromagnetic friction disc coupling and with two different windmilling rpms

摘要

The fan wheel (2) with non connected friction disc coupling can be driven across a second friction disc coupling at a low windmilling rpm. The rotor (8) at its radial outer annular wall or hollow shaft (9) has a belt drive pulley (5) for a drive. A further eddy current coupling (35) is provided between the fan wheel or similar, and the rotor (8) with the belt pulley, for the prodn. of a further windmilling rpm. The rotor (8) is located on a stationary shaft (34) across a ball bearing (33). ADVANTAGE - Requires higher engineering cost compared to known unit. Facilitates reliable and adjustable windmilling speed independent of friction of ball bearing and follower effect on rotor of eddy current coupling.