Sliding bearing subject to thermal expansion

Details Sliding bearing subject to thermal expansion Sliding bearing subject to thermal expansion

F - Mech Eng,Light,Heat,Weapons

16

C

F16C 17/22 (2006.01) F16C 27/02 (2006.01) F16C 33/04 (2006.01) F16L 41/04 (2006.01)

Patent

CA 2513270

A bearing (130) for rotatably supporting a cylindrical shaft within a frame cylindrical support surface in which the shaft is subject to thermal expansion, the bearing (130) being formed of a tubular member having opposed ends (132, 134) and having an axial passageway therethrough, the outer surface (136) of the bearing member (130) having an external circumferential rib (144, 146) adjacent each of the ends (132, 134), each rib having an external diameter that permits the bearing member (130) to be slideably positionable in the frame internal cylindrical support surface, the axial passageway being defined by a central bearing surface (150) of internal diameter to rotatably receiving the shaft, the bearing surface (150) having an axial length less than the spacing between said ribs, the bearing (130) being deformable within elastic limits permitting the internal diameter of the bearing surface (150) to expand to accept thermal expansion of the shaft.

Cette invention concerne un palier (130) maintenant en rotation un arbre cylindrique à l'intérieur d'une surface portante cylindrique dans laquelle ledit arbre est soumis à une dilatation thermique. Le palier (130) est constitué par un élément tubulaire présentant des extrémités opposées (132, 134) traversées par un passage axial. La surface extérieure (136) du palier (130) comporte une arête périphérique extérieure (144, 146) adjacente à chacune des extrémités (132, 134). Chaque arête a un diamètre extérieur permettant au palier (130) d'être positionné coulissant dans la surface portante cylindrique intérieure. Le passage axial est défini par une surface portante centrale (150) à diamètre intérieur recevant l'arbre en rotation. La surface portante a une longueur axiale inférieure à l'intervalle entre lesdites arêtes. Le palier (130) est déformable dans certaines limites élastiques permettant au diamètre intérieur du palier (130) de la surface portante (150) de se dilater en fonction de la dilatation thermique de l'arbre.

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