Apparatus for measuring an unbalance of a rotary member

Details Apparatus for measuring an unbalance of a rotary member Apparatus for measuring an unbalance of a rotary member

1990-02-13

1991-10-22

Chapman, John E.

Measuring and testing

Rotor unbalance

Dynamic

G01M 102

Patent

active

050584294

ABSTRACT:
An apparatus for measuring an unbalance of a rotary member, such as an electric motor armature, comprises a rotary member mounting arrangement for rotatably mounting the rotary member for a measurment operation. The mounting arrangement is capable of oscillating movement in a measurement direction. A drive belt for driving the rotary member in rotation bears against the rotor in substantially tangential relationship therewith or passes around the rotor over a small part of the periphery thereof. A measurement transducer detects forces or oscillations produced by the rotation of the rotary member in the measurement direction and outputs a corresponding signal for unbalance measurement. The drive direction of the belt drive in relation to the rotary member is normal to the measurement direction. The measurement direction may be inclined to facilitate fitting the rotary member into and removing it from the mounting arrangement of the apparatus.

REFERENCES:
patent: 3049927 (1962-08-01), Merrill et al.
patent: 4297882 (1981-11-01), Curchod et al.
patent: 4712425 (1987-12-01), Augendre et al.
patent: 4868762 (1989-09-01), Grim et al.

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