Unitized tone ring assembly

G - Physics – 01 – P

Patent

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Details

G01P 3/44 (2006.01) G01P 3/487 (2006.01)

Patent

CA 2431697

A tone ring assembly for use on a rotatable machine part. The tone ring (10) is able to generate a varying voltage output when rotated at varying speeds. A fixed position magnetic sensor detects this voltage. The tone ring comprises an axially extending main body portion (18) having a plurality of areas able to generate a voltage upon rotation (32, 34). A retainer (75) having at least one radial flange prevents axial movement of the tone ring and the tone ring includes ribs and spaces on its inside diameter to permit oil to pass therethrough.

L'invention porte sur un ensemble générateur de fréquences en forme de bague destiné à être utilisé sur une pièce d'une machine rotative. Le générateur de fréquences en forme de bague (10) permet de générer une sortie à tension variable lors d'une rotation à plusieurs vitesses. Un capteur magnétique fixe détecte cette tension. Le générateur de fréquences en forme de bague comprend un corps principal s'étendant axialement (18) et possédant une pluralité de zones capables de générer une tension lors de la rotation (32, 34). Un dispositif de retenue (75) comportant au moins un rebord radial empêche le déplacement axial du générateur de fréquences en forme de bague, ce dernier comportant sur son diamètre interne des nervures et des espaces pour permettre le passage de l'huile.

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