Viscous clutch having improved flux circuit

Details Viscous clutch having improved flux circuit Viscous clutch having improved flux circuit

F - Mech Eng,Light,Heat,Weapons

16

D

F16D 35/02 (2006.01)

Patent

CA 2615807

A viscous clutch assembly (100) includes a rotational input structure (110), a rotor (104) attached to the rotational input structure (110), a selectively rotatable member (102) surrounding the rotor (104) and rotatably supported by the rotational input structure (110), an electromagnetic coil (108) positioned relative to a driven side of the rotor (104), a valve assembly (106) supported by the rotor (104), and a magnetic flux circuit for controlling the valve assembly (106) with magnetic flux generated by the electromagnetic coil (108). The valve assembly (106) includes a cover plate (140) for regulating flow of a shear fluid. The rotational input structure (110) comprises a material capable of conducting magnetic flux. The magnetic flux circuit is configured to include no more than four air gaps (G1-G4).

Un embrayage visqueux (100) inclut une structure d~entrée rotative (110), un rotor (104) fixé à la structure d~entrée rotative (110), un élément pouvant tourner sélectivement (102) entourant le rotor (104) et soutenu en rotation par la structure d~entrée en rotation (110), une bobine électromagnétique (108) placée sur côté entraîné du rotor (104), un clapet (106) soutenu par le rotor (104), et un circuit de flux magnétique commandant le clapet (106) avec le flux magnétique généré par la bobine électromagnétique (108). Le clapet (106) inclut un couvercle (140) destiné à réguler le flux d~un fluide à cisaillement. La structure d~entrée rotative (110) comporte un matériau capable de conduire le flux magnétique. Le circuit de flux magnétique est conçu pour inclure au maximum quatre vides d~air (G1-G4).

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