Method and apparatus for evaluating vibrations of a rotary body

Details Method and apparatus for evaluating vibrations of a rotary body Method and apparatus for evaluating vibrations of a rotary body

1996-03-29

1998-02-10

Chapman, John E.

Measuring and testing

Vibration

Resonance, frequency, or amplitude study

73660, G01M 702

Patent

active

057171416

ABSTRACT:
A method and apparatus for evaluating the vibration of a rotary body in a static or non-rotational state to determine a profile of critical speeds including profiles of critical speeds which exist beyond a rated revolution velocity of the rotary body. This invention comprises: a plurality of bearings for maintaining the rotary body in a non-rotating or static condition; a rotary vibrator for applying an exciting force which is rotated about a shaft to the rotary body; a vibration sensor for detecting the vibration of the rotary body; a vibration meter for measuring an output from the vibration sensor; and a vibration power source for supplying AC power to the rotary vibrator and for sweeping a frequency of the exciting force applied from the rotary vibrator to the rotary body from a low-frequency region to a high-frequency region. Thus, the present invention obtains the vibrational characteristics of the rotary body in a simulated rotational or dynamic state in which the rotating body is actually maintained in a static or non-rotational state.

REFERENCES:
patent: 3130576 (1964-04-01), Giers et al.
patent: 4078434 (1978-03-01), Weberhofer
patent: 4805457 (1989-02-01), Oates et al.
patent: 5097355 (1992-03-01), Eden
patent: 5520061 (1996-05-01), Thibault et al.
Patent Abstracts of Japan, vol. 007, No. 156 (P-209) (Abstract of JP 58 066826) (1958).
Database WPI, Section El, Week 8409 (Abstract of SU 1 016 720 A) (1983).

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