Method and apparatus for cancellation of rotational unbalance

Details Method and apparatus for cancellation of rotational unbalance Method and apparatus for cancellation of rotational unbalance

1993-03-08

1994-09-20

Herrmann, Allan D.

Machine element or mechanism

Elements

Flywheel, motion smoothing-type

29901, 74574, 248554, 248638, F16F 1520, F16F 1522

Patent

active

053478843

ABSTRACT:
A device (19) for generating a rotating force vector and an oscillatory couple includes a plurality of non-concentric eccentric masses (22A, 22B, 22C, 22D, 22E, 22F) co-rotating at the same angular speed; and means (24A, 24B, 24C, 24D, 24E, 24F) for individually controlling the angular position of each of the masses; whereby, by selectively controlling the angular position of each eccentric mass, the device may generate a desired rotating force vector and a desired oscillatory couple. In use, the device performs an improved method for opposing the propagation of vibration from a dynamically unbalanced rotating rotor through a supporting structure (12). This method comprises the steps of: mounting a plurality of non-concentric rotatable eccentric masses on the supporting structure; co-rotating each eccentric mass at the same angular speed as the rotor, and controlling the angular position of each mass relative to the angular position of the rotor; thereby to generate a pattern of rotating inertial forces to oppose the transmission of vibration from the rotor through the supporting structure.

REFERENCES:
patent: 3158038 (1964-11-01), Goodman
patent: 4819182 (1989-04-01), King et al.
patent: 5005439 (1991-04-01), Jensen et al.
patent: 5092195 (1992-03-01), Parsons

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