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Lock Rotary Actuator

A technology of rotary actuators and locking devices, applied in the direction of fluid pressure actuating devices, etc., can solve the problems of difficulty in providing no leakage performance, loss of actuator locking ability, etc., and achieve the effect of improving position holding ability

Active Publication Date: 2019-06-07
WOODWARD GOVERNOR CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in typical rotary hydraulic actuators (e.g., rotary "vane" or rotary "piston" type configurations), it can be difficult to provide leak-free performance because this requires a substantially perfect seal of the stagnant hydraulic fluid in order to maintain actuation. Angular position of actuator
Furthermore, any single failure of the seal will result in a complete loss of the locking ability of the actuator

Method used

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Examples

Experimental program
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Embodiment Construction

[0017] This document describes systems and techniques for locking a rotary actuator. In general, the rotary actuators described herein include a rotor that rotates relative to an outer housing. The rotor includes a mechanism that can be actuated to cause one or more keys to extend radially from the rotor. The keys extend into axial grooves (non-circumferential recesses) formed in the inner diameter of the outer housing. The extended key is reversibly captured within the recess and mechanically limits or prevents rotation of the rotor relative to the outer housing. In an example aircraft application, the rotor may be configured to control the position of a control surface (e.g., flaps, rudder, or aileron) relative to the wing to which the outer casing is attached, and in a locked configuration, lock the rotation The actuators are capable of maintaining the relative position between the control surfaces and the wing.

[0018] Figure 1A with 1B is an axial cross-sectional si...

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Abstract

The subject matter of the present description can be embodied, inter alia, in a locking device for a rotary actuator, wherein said locking device comprises an outer housing comprising a cylindrical inner surface with a recess. The rotor is arranged inside the housing. The rotor has a lumen and a port extending radially from the lumen to the outer surface of the barrel. A piston is configured to reciprocate within the cavity between a first position and a second position and includes a first portion having a first thickness and a second portion having a second thickness greater than the first thickness. A key is configured to reciprocate radially within the port and includes a radially proximal portion and a radially distal portion. When the piston is in the first position, the radially proximal portion contacts the first portion and the radially distal portion does not extend into the recess.

Description

[0001] declaration of priority [0002] This application claims priority to US Patent Application No. 14 / 503,734, filed October 1, 2014, the entire contents of which are hereby incorporated by reference. technical field [0003] This specification relates to a rotary actuator with a locking mechanism. Background technique [0004] Various forms of rotary hydraulic actuators are currently used in industrial machinery power conversion applications. Such industrial use is typically for applications where continuous inertial loading is desired without the need to maintain the load for long durations (eg, up to hours), and without the use of an external source of fluid power. Aircraft flight control applications typically implement load position retention, for example, using a blocked fluid column to maintain position in a failure mitigation mode. [0005] In certain applications, such as primary flight controls for aircraft operations, positional accuracy in load holding by ro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B15/26
CPCF15B15/261F15B2015/267F15B2015/268F15B15/12
Inventor J.T.科佩塞克
Owner WOODWARD GOVERNOR CO
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