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US 7,118,328 B2Granted
Gearbox mounted force generator
AssigneeSikorsky Aircraft Corporation
InventorsWilliam A. Welsh, Erez Eller, Robert K. Goodman
Life of this patent
Estimating the term…
Abstract
An active vibration control (AVC) system includes a shaft-driven gearbox mounted force generator (GMFG) mounted to a main rotor transmission. The GMFGs receive shaft power from an output shaft driven by the main rotor transmission and/or engine-to-transmission gearbox to avoid separate drive motors.
Claims26
An active vibration control system comprising:
- a first shaft defined along a first axis;
- a first gear mounted to said first shaft;
- an input shaft engaged with said first gear;
- a second gear mounted to said first shaft;
- a first mass mounted to said second gear;
- a third gear mounted to said first shaft;
- a second mass mounted to said third gear;
- a fourth gear engaged with said second gear and said third gear such that said third gear and said second gear counter-rotate;
- and
- a first differential assembly engaged with said first gear and said second gear to selectively adjust rotation of said first mass and said second mass relative said first gear to generate a first vibratory force output.
7 more elements
An active vibration control system comprising:
- a first shaft defined along a first axis;
- a first gear mounted to said first shaft;
- a second gear mounted to said first shaft;
- a first mass mounted to said second gear;
- a third gear mounted to said first shaft;
- a second mass mounted to said third gear;
- a fourth gear engaged with said second gear and said third gear such that said third gear and said second gear counter-rotate;
- and
- a first differential assembly engaged with said first gear and said second gear to selectively adjust rotation of said first mass and said second mass relative said first gear to generate a first vibratory force output wherein said first differential assembly comprises a clutch.
6 more elements
An active vibration control system comprising:
- a first shaft defined along a first axis;
- a first gear mounted to said first shaft;
- a second gear mounted to said first shaft;
- a first mass mounted to said second gear;
- a third gear mounted to said first shaft;
- a second mass mounted to said third gear;
- a fourth gear engaged with said second gear and said third gear such that said third gear and said second gear counter-rotate;
- and
- a first differential assembly engaged with said first gear and said second gear to selectively adjust rotation or said first mass and said second mass relative said first gear to generate a first vibratory force output wherein said first differential assembly comprises a magnetorheological fluid clutch.
6 more elements
An active vibration control system comprising:
- a helicopter transmission;
- an engine-to-transmission gearbox which drives said helicopter transmission;
- and
- a force generator mounted to said engine-to-transmission gearbox, said force generator mechanically driven by an input shaft rotated by said engine-to-transmission gearbox.
1 more element
An active vibration control system comprising:
- a helicopter transmission;
- an engine-to-transmission gearbox which drives said helicopter transmission;
- and
- a force generator mounted to said engine-to-transmission gearbox, said force generator driven by an input shaft rotated by said engine-to-transmission gearbox;
- a first shaft defined along a first axis;
- a first gear mounted to said first shaft, said first gear driven by said input shaft;
- a second gear mounted to said first shaft;
- a first mass mounted to said second gear,
- a third gear mounted to said first shaft;
- a second mass mounted to said third gear;
- a fourth gear engaged with said second gear and said third gear such that said third gear and said second gear counter-rotate;
- and
- a first differential assembly engaged with said first gear and said second gear to selectively adjust rotation of said first mass and said second mass relative said first gear to generate a first vibratory force output.
10 more elements
An active vibration control system comprising:
- a helicopter transmission;
- an engine-to-transmission gearbox which drives said helicopter transmission;
- and
- a force generator mounted to said engine-to-transmission gearbox, said force generator driven by an input shaft rotated by said engine-to-transmission gearbox;
- and
- a second force generator mounted to said helicopter transmission, said second force generator driven by an output to a helicopter tail rotor.
3 more elements
An active vibration control system comprising:
- a helicopter transmission;
- and
- a force generator mounted to and mechanically driven by said helicopter transmission.
An active vibration control system comprising:
- a helicopter transmission;
- and
- a force generator mechanically driven by said helicopter transmission.
Dependencies are inferred from the claim text.