Ntn-Snr Roulements

Snr Roulements

Ntn Europe

Etienne Vandamme

Pascal Desbiolles

Christophe Duret

Cécile Flammier

Cyril Peterschmitt

Jérôme Mathieu

Julien Berthier

Gérard Ballas

Sébastien Silfest

Nicolas Crochet

Frédéric Guerre-Chaley

Ralf Lindemann

Antoine Senepin

Flamier; Cécile

Jérome Mathieu

Pierre Bel

Christophe Duet

An instrumented bearing comprising a stationary outer ring and a rotating inner ring is provided with an encoder, a sensor assembly comprising a read head positioned opposite and at a reading distance from the encoder, and a leakage current collector capable of coming into sliding contact with an annular contact which can be rigidly connected, directly or indirectly, to the inner ring. The encoder and the read head are positioned axially between the outer ring and the leakage current collector. A conductive electrical connection between the leakage current collector and the stationary outer ring also forms a magnetic shield of ferromagnetic material, extending from the outer ring to the leakage current collector by surrounding the encoder and the read head.

Instrumented bearing incorporating a leakage current collector and a magnetic shield

The invention relates to a system comprising a coder that has an alternation of North and South magnetic poles separated by transitions extending along a helix of pitch p and of angle &#x3b1;, the magnetic track having Npairs of North and South poles and a polar width Lmeasured along a normal to the transitions which are: N=&#x3c0;a/l and L=p&#xb7;cos &#x3b1;. The invention also includes at least one sensor able to detect the rotating magnetic field in a plane perpendicular to the magnetic track and to the transitions by means of a mounting of at least two sensitive magnetic elements. The mounting being disposed at a radial reading distance from the magnetic track and being arranged to deliver signals in quadrature.

System for determining at least one rotation parameter of a rotating member

The invention relates to a system comprising a coder that has an alternation of North and South magnetic poles separated by transitions extending along an helix of pitch p and of angle &#x3b1;. The invention having Npairs of North and South poles and a polar width Lmeasured along a normal (N) to the transitions which are: N=&#x3c0;a/I and L=p.cos &#x3b1;. The invention also includes a sensor able to detect the period magnetic field emitted by the coder by means of at least two sensitive magnetic elements which are disposed at a radial reading distance from the magnetic track. The sensitive elements are disposed in relation to one another to deliver signals in quadrature.

Growing community of inventors

Alleves, France

Etienne Vandamme