Vibration detector and method for a rotating shaft

Details Vibration detector and method for a rotating shaft Vibration detector and method for a rotating shaft

1990-12-24

1992-10-20

Kunemund, Robert

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Including specific material of construction

156601, 1566171, 1566181, 15662074, 156DIG91, 422245, 422249, B01D 900

Patent

active

051568225

ABSTRACT:
Apparatus for detecting abnormal vibration in a shaft, such as a rotating crucible holder drive shaft of a crystal puller, has a pair of sensors disposed 90 degrees with respect to each other. The signals are high pass filtered and added together, then low pass filtered and full wave rectified to operate an alarm and strip recorder. A method for detecting vibration in a shaft comprises sensing vibrations in the shaft, filtering the sensed signals, and rectifying the filtered signals.

REFERENCES:
patent: 4008387 (1977-02-01), Green et al.
patent: 4073355 (1978-02-01), Schmidt et al.
patent: 4148222 (1979-04-01), Wolfinger
patent: 4258003 (1981-03-01), Hurle et al.
"Early diagnosis of dynamic unbalances and of misalignments in large turbogenerators," Clapis et al; Eneria Nucleus, vol. 23, (5) pp. 271-277 (1976).

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