Device for radial detection of the rotational speed of a rolling

Details Device for radial detection of the rotational speed of a rolling Device for radial detection of the rotational speed of a rolling

1994-02-22

1995-07-18

Snow, Walter E.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

32420725, G01P 3488, G01B 730

Patent

active

054345030

ABSTRACT:
The device for detecting the rotational speed of a rolling-contact bearing includes an encoding element provided with a multipolar ring with axial magnetism secured to the rotating race of the bearing. The device further includes a sensor element provided with a passive sensor with a coil wound in an annular magnetic flux concentrator of U-shaped cross-section, and with a sensor holder secured to the non-rotating race of the bearing. The multipolar ring and the sensor element are located radially with an air gap. The magnetic flux concentrator includes a cylindrical part delimited axially by two collecting branches situated radially outside the cylindrical part. At least one of the collecting branches includes teeth on its periphery. Also, that branch of the flux concentrator which is located on the same side as the rolling elements is inclined toward the adjoining row of rolling elements.

REFERENCES:
patent: 3500091 (1970-03-01), Jones
patent: 3916234 (1975-10-01), Stigall et al.

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