Arrangement with a plain bearing

F - Mech Eng,Light,Heat,Weapons – 16 – C

Patent

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Details

F16C 17/08 (2006.01) F16C 39/06 (2006.01) H02K 5/167 (2006.01) H02K 7/09 (2006.01)

Patent

CA 2463149

The invention relates to a device comprising a plain bearing (36), which contains ferromagnetic material and which is provided for radially supporting a shaft (34) that is made of ferromagnetic material. The shaft (34) is mounted in said plain bearing (36) in a manner that enables it to rotate and be axially displaced and has a free end (35). A footstep bearing is provided on the latter, comprises a step rounding (66),which is provided on said free end (35), and comprises a contact element (68, 69) that interacts with the step rounding. This contact element (68, 69) consists, at least in part, of a ferromagnetic material. In addition, at least one permanent magnet (72) is provided, which is placed in the area around the free shaft end (35) between the axial end of the plain bearing (36) at that location and the contact element (68) in order to form a magnetic circuit (82) starting from one pole (74) of the at least one permanent magnet (72) to the other pole (76) of the at least one permanent magnet (72) while passing via the plain bearing (36), the free shaft end (35), the step rounding (66) and the contact element (68). This results in inducing a defined magnetic attractive force between the step rounding (66) and the contact element (68).

L'invention concerne un dispositif équipé d'un palier lisse (36), qui contient une matière ferromagnétique et qui sert au stockage radial d'un arbre (34) en matière ferromagnétique. Ledit arbre (34) est disposé de manière à pouvoir tourner et à être déplacé axialement dans ledit palier lisse (36) et il présente une extrémité libre (35). L'extrémité libre (35) comprend un palier de butée comportant un sommet de butée (66) et un élément d'installation (68, 69) fonctionnant avec celui-ci, ledit élément d'installation étant constitué au moins en partie de matière ferromagnétique. De plus, ledit dispositif est équipé au moins d'un aimant permanent (72), qui est disposé dans la partie située autour de l'extrémité (35) libre de l'arbre entre l'extrémité axiale dudit palier lisse (36) et l'élément d'installation (68), ce qui permet la formation d'un cercle magnétique (82) d'un pôle (74) dudit aimant permanent (72) en passant par ledit palier lisse (36), l'extrémité (35) libre de l'arbre, le sommet de butée (66) et l'élément d'installation (68) vers l'autre pôle (76) dudit aimant permanent (72), ainsi que la formation d'une force d'attraction magnétique définie entre le sommet de butée (66) et l'élément d'installation (68).

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