Prober for testing generator stator wedge tightness with rotor i

Details Prober for testing generator stator wedge tightness with rotor i Prober for testing generator stator wedge tightness with rotor i

1989-09-01

1991-06-04

Noland, Tom

Geometrical instruments

Gauge

Collocating

33502, 33558, 32420718, 358100, 738658, G01B 714, G01B 2116

Patent

active

050202340

ABSTRACT:
Apparatus for measuring ripple spring deflection to determine stator wedge tightness in an electric generator without removing the rotor includes a low profile carriage insertable in the gap between the rotor and stator. A probe is aligned longitudinally and laterally with holes in the stator wedges with the aid of a miniature television camera on the carriage and extended through an aligned hole to contact the ripple spring. The probe is connected through a cable to the core of a linear variable differential transformer mounted on the carriage which provides an accurate measurement of probe extension. The probe is extended and retracted by an arrangement of cables and springs providing a lost motion coupling which accommodates for seating of the probe against a ripple spring at less than full extension.

REFERENCES:
patent: 1108697 (1914-08-01), Cash
patent: 3845561 (1974-11-01), Elsdoerfer
patent: 4422320 (1983-12-01), Moorby et al.
patent: 4502329 (1985-03-01), Fukunaga et al.
patent: 4534206 (1985-08-01), Kiso et al.
patent: 4676665 (1987-06-01), Twerdochlib
patent: 4803563 (1989-02-01), Dailey et al.
patent: 4811091 (1989-03-01), Morrison et al.
patent: 4889000 (1989-12-01), Jaafar et al.

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