Apparatus and method for reducing vibration of rotating machinery
US4963804A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 10, 1989 |
| Grant date | Oct 16, 1990 |
| Priority date | — |
| Expiry date | Jul 10, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F7/1011
- WIPO fieldControl
- WIPO sectorInstruments
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…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.