Magnetic-control closure system
AssigneeSociete Nationale d'Etude et de Construction de Moteurs d'Aviation "S.N.E.C.M.A."
InventorsClaude Duquenne, Andre Mondy
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Abstract
The inner compartment of a compressor for noxious fluids is isolated by means of the closure system when the compressor is stationary and disengaged from its driving means. The closure system is controlled by a magnetic attraction system, the external surface of which is uniformly constructed of magnetic material having a small thickness at the level of non-magnetic elements. A particularly noteworthy application of the system is in motor-compressor sets for the transfer of toxic and hazardous fluids employed in the nuclear engineering field.
Claims7
A magnetic-control closure system for the rotor of a rotating machine which transports a noxious fluid, constituted by an annular seal located in a plane at right angles to the axis of rotation of the machine, said seal being clamped in the active position thereof between on the one hand stationary knife-edges formed on the rotor for this purpose and on the other hand movable knife-edges carried by an annular support member which is capable of moving along the axis of the machine, in which the movable support member moves under the action of a magnetic attraction system between an inactive position in which said member is separated from the rotor and an active position in which said member is coupled with said rotor under the action of magnetic attraction forces, the magnetic attraction system being such as to have an external portion defining a face which can be coupled with the rotor under the action of the magnetic attraction forces, wherein said external portion of the magnetic attraction system is uniformly constructed of magnetic material and comprises at least one annular portion of small thickness which defines a magnetic shunt having high reluctance.
Dependencies are inferred from the claim text.