Hydraulic blocking rotary actuator with continuous seal extending to radial locations
The vane seal transition from a face seal to a radial seal in hydraulic blocking rotary actuators addresses the limitations of existing designs, enabling increased torque and stroke by using thinner static pistons and taller rotor vanes, thus improving the actuator's performance.
WO2026135951A1PCT designated stage Publication Date: 2026-06-25WOODWARD INC
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- WOODWARD INC
- Filing Date
- 2025-11-25
- Publication Date
- 2026-06-25
Smart Images
Figure US2025057081_25062026_PF_FP_ABST
Abstract
A rotary actuator includes a rotor in which a well is formed and a static rotary piston having an inner vane extending into the well. A seal groove and a seal runs along a peripheral face of the inner vane and lateral and longitudinal ends of the static rotary piston. The continuous seal contacts the rotor to form a vane seal transition from a face seal located at the inner vane surface perpendicular to a rotary axis of the rotor to a radial seal located at the lateral end of the interior wall of the static rotary piston in parallel with the rotary axis. Such seal divides the well into two pressure chambers and is configured as a dynamic seal to prevent leakage between them. The radial seal eliminates an interior seal gland wall, allowing for a taller rotor vane and increased rotary torque for a given outside diameter.
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