Method of and arrangement for determining the axial play between

Details Method of and arrangement for determining the axial play between Method of and arrangement for determining the axial play between

1981-08-31

1983-06-28

Myracle, Jerry W.

Measuring and testing

Internal combustion engine or related engine system or...

Compression

29732, 73668, G01M 1500

Patent

active

043898831

ABSTRACT:
An arrangement for determining the axial play between the stator and the rotor of an electric motor, especially of a small-size electric motor, includes resilient elements which mount the respective electric motor on a stationary support for oscillatory movement relative thereto, an electromagnet which causes the electric motor to oscillate in a predetermined path at such a frequency and amplitude that, so long as there is an axial play between the rotor and axial bearings thereof, the rotor will conduct movement not only with, but also relative to, the stator, which results in axial impacts between the rotor and the axial bearing and in a complex motion of the stator which has the effect of the impacts superimposed on the basic motion. The arrangement further includes a sensor which detects the complex motion and generates an electric signal representative thereof. The electric signal may then be compared with a reference signal and, in the event of discrepancy, which is attributable solely to the effects of the axial play and the resulting impacts, a command signal may be issued which controls the operation of an automatic device adjusting the position of one of the bearings toward reduction or elimination of the axial play.

REFERENCES:
patent: 3681976 (1972-08-01), Schulz, Jr.
patent: 4283830 (1981-08-01), Gallizio et al.

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