Apparatus and method for reducing vibration of rotating machinery
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United States of America Patent
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Oct 16, 1990
Grant Date -
N/A
app pub date -
Jul 10, 1989
filing date -
Jul 10, 1989
priority date (Note) -
Expired
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Abstract
A vibration reduction apparatus uses a electromagnetic exciter mechanism to reduce vibrations induced in a machine by a rotating component of the machine. The electromagnetic exciter mechanism employs a magnetic inertial mass coupled in a non-contacting manner externally on a housing of the machine remote from the vibration-inducing rotating component. To operate the electromagnet exciter mechansism, the apparatus employs a vibration sensor attached externally on the machine housing. The sensor senses the vibrations and generates an output signal representative thereof. Also, the apparatus employs signal processing units coupled to the machine for sensing the frequency of an electrical input power signal to the machine which drives the rotating component and generating an output signal representative thereof. The signal processing units also process the output signal representative of the induced vibrations together with the output signal representative of the input power frequency, compare the processed signals with a standard signal representative of previous vibration correcting signals and in response thereto produce and apply a new correcting signal to a power signal producing unit of the apparatus for modulating an input power signal to prodcue a corrected input power signal for operating the electromagnetic exciter mechanism to reduce the magnitude of vibrations induced at the preselected location on the machine housing by the rotating component.
First Claim
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- CURTISS-WRIGHT ELECTRO-MECHANICAL CORPORATION;WESTINGHOUSE ELECTRIC CORPORATION
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Geiger, Thomas L | Valencia, PA | 2 | 46 |
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Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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