Servovalve
AssigneeHamilton Sunstrand Corporation
InventorsMarcin Cis, Sebastian Zuraw
Life of this patent
Estimating the term…
Abstract
A servovalve includes a fluid transfer valve assembly comprising a supply port and a control port and a moveable valve spool arranged to regulate flow of fluid from the supply port to the control port in response to a control signal. The servovalve also includes a jet pipe assembly configured to direct fluid to the ends of the spool to axially move the valve spool relative to the fluid transfer assembly in response to the control signal to regulate the fluid flow. The jet pipe assembly comprises a jet pipe a connector header fluidly connecting the jet pipe to a nozzle. The spool has one or more openings 28 is provided in the spool such that fluid from the supply port flows into the interior of the spool and into the jet pipe.
Claims12
A servovalve comprising:
- a fluid transfer valve assembly comprising a supply port and a control port;
- a moveable valve spool arranged to regulate flow of fluid from the supply port to the control port in response to a control signal;
- and
- a jet pipe assembly configured to axially move the moveable valve spool relative to the fluid transfer valve assembly in response to the control signal to regulate the fluid flow;
- wherein the jet pipe assembly comprises a steerable nozzle from which fluid is directed to the ends of the spool in an amount determined by the control signal;
- and
- wherein fluid is provided to the nozzle via a connector header in fluid communication with the interior of the spool, the spool being provided with one or more openings in a body of the spool via which fluid from the supply port enters the interior of the moveable valve spool and flows into the connector header and to the steerable nozzle;
- and
- wherein filter means for filtering the fluid entering the interior of the moveable valve spool are provided in or across the one or more openings;
- wherein the filter means comprises the one or more openings being in the form of perforations formed in the spool.
Dependencies are inferred from the claim text.