Vibration diagnosis method for rotary machine

Details Vibration diagnosis method for rotary machine Vibration diagnosis method for rotary machine

1982-04-26

1984-05-15

Birmiel, Howard A.

Measuring and testing

Vibration

Sensing apparatus

340683, G01M 122

Patent

active

044480776

ABSTRACT:
A vibration diagnosis method for a rotary machine is disclosed. The presence or absence of a self-excited vibration is determined by checking if a rotating speed is in a rotating speed range which allows the occurrence of the self-excited vibration, if an amplitude of a frequency component corresponding to a first order critical speed is larger than a predetermined level, and if phases at characteristic points of vibration signals change among cycles.

REFERENCES:
patent: 3686956 (1972-08-01), Simpkin et al.
patent: 4213346 (1980-07-01), Polovnikov et al.
patent: 4352293 (1982-10-01), Kurihara et al.
"Early Diagnosis of Dynamic Unbalances and of Misalignments in Large Turbogenerators", Clapis et al., Eneria Nucleare, vol. 23, No. 5, pp. 271-277.

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