F - Mech Eng,Light,Heat,Weapons – 16 – D
Patent
F - Mech Eng,Light,Heat,Weapons
16
D
192/7, 188/9
F16D 37/02 (2006.01)
Patent
CA 1308049
72690-5 ABSTRACT OF THE DISCLOSURE A magnetic particle clutch is provided for use as a clutch or brake. The clutch is particularly useful in a hell- copter steering subassembly. The clutch has an inner rotor and an outer drum with a common axis. The inner rotor has a shaft on which the outer drum is journaled. Between the inner rotor and the outer drum is a cylindrical working cavity, which contains magnetic powder. The outer drum has a peripheral coil and has exterior slip rings for actuating the coil. Axial flux lines caused by the actuated coil pass through the magnetic powder, causing a chain-like linking of particles of powder, which results in a shear force and torque between outer drum and inner rotor. In order to prevent shifting of the powder within the cylindrical cavity during tilting of the clutch, a series of conical and radial cavities are disposed at each end of the cylindrical cavity and connecting thereto. The conical and radial cavities at each end act like powder guides. Centrifugal force on the powder at clutch start-up distributes evenly the powder peripherally and axially along cylindrical cavity. Gravity forces on the powder during angular displacements of the clutch in a helicopter during flight do not easily displace the powder out of the cylindrical cavity. The clutch torque is proportional to coil current and is independent of clutch speed.
583998
Fink Richard A.
Raymond Bruce C.
Honeywell Inc.
Smart & Biggar
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