Inspection device for rotor binding defects in electrical machin

Details Inspection device for rotor binding defects in electrical machin Inspection device for rotor binding defects in electrical machin

1986-03-06

1987-12-01

Levy, Stewart J.

Measuring and testing

Vibration

By mechanical waves

73611, G01N 2904

Patent

active

047095822

ABSTRACT:
In a rotor binding inspection device comprising a self-powered carriage movable about the rotor shaft and a probe-carrying arm carried by said carriage and operable to move longitudinally parallel to the axis of the rotor between the stator and the rotor binding, said arm carrying at its extremity two detector units each comprising a right angle, longitudinal wave probe and an oblique angled, transverse wave probe, additional means are provided for recording the right angle probe echoes, for recording the angled probe echoes and for defining for the angled probes, based upon the indications from the right angle probes, a variable detection threshold.

REFERENCES:
patent: 3599478 (1971-08-01), Weinbaum
patent: 4351190 (1982-09-01), Rehme et al.
patent: 4375165 (1983-03-01), de Sterke
patent: 4502331 (1985-03-01), Singh et al.
Patent Abstracts of Japan, vol. 8, No. 237, (P-310) Oct. 30, 1984.

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