Servovalve having a linear actuator and mechanical feedback
AssigneeSafran Aerosystems Hydraulics
InventorMatthieu PAPOIN
Life of this patent
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Abstract
A servovalve having a pilot stage includes two hydraulic elements that are movable relative to each other so as to move a power-directing member, the pilot stage including a linear actuator having a main pusher arranged to modify the relative position of the hydraulic elements. The pilot stage has a position feedback lever.
Claims10
A servovalve having a pilot stage comprising a hydraulic element for ejecting a jet of fluid and a hydraulic element for receiving the jet of fluid, the hydraulic elements being movable relative to each other so as to modify their relative position and thus generate a pressure difference usable for moving a power-directing member of the servovalve, one of the two elements being mounted in a fixed position on a body of the servovalve and the other one of the elements being mounted at the movable end of a support that is connected to the body of the servovalve, the pilot stage including a lever provided with a force transfer interface comprising an application, first point for applying an output force on the lever and a transmission, second point for transmitting the output force from the lever towards the support, the lever also being connected at a connection, third point to the power-directing member, wherein:
- the pilot stage comprises a linear actuator including a main pusher arranged to exert the output force selectively on the support to modify the relative position of the hydraulic elements;
- and
- the application, first point and the transmission, second point are situated on opposite sides of a first plane extending parallel to an output direction of the main pusher and perpendicularly to a neutral axis of the lever.
Dependencies are inferred from the claim text.