Method and apparatus for mounting a bearing

Details Method and apparatus for mounting a bearing Method and apparatus for mounting a bearing

F - Mech Eng,Light,Heat,Weapons

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F01D 25/16 (2006.01) B23P 15/00 (2006.01) D01H 7/20 (2006.01) F16C 33/34 (2006.01) F16C 33/62 (2006.01) F16C 35/073 (2006.01)

Patent

CA 2321641

A method and apparatus for mounting a bearing (20) on a shaft (22). An intermediate member (24) is mounted on the shaft (22). An inner race (26) of the bearing is mounted onto the intermediate member (24). Two separable compression members (52, 54) are mounted on the outer diameter of the inner race (26). The compression members (52, 54) are mounted with an interference fit, thus inducing a state of compression in the inner race. The intermediate member (24) is radially compliant and compensates for thermal growth of the shaft (22) in excess of the thermal growth of the inner race (26). The state of compression in the inner race (26) persists to about 1000 ~F. In one embodiment, the present invention includes an inner race (26) fabricated from a material with low fracture toughness or for which a state of compression is desirable, such as a ceramic material.

L'invention concerne un procédé et un dispositif permettant de monter une portée (20) sur un arbre (22). On monte d'abord élément (24) intermédiaire sur l'arbre (22) puis on monte le chemin (26) de roulement interne de la portée sur cet élément (24) intermédiaire. On monte deux éléments (52, 54) de compression dissociables sur le pourtour externe du chemin de roulement interne. Ces éléments (52, 54) de compression sont montés avec un ajustement serré induisant un état compressif dans le chemin de roulement interne. L'élément (24) intermédiaire est déformable dans le sens radial et permet de compenser la dilatation thermique de l'arbre (22) lorsque cette dernière est supérieure à la dilatation thermique du chemin (26) de roulement interne. L'état compressif persiste dans le chemin (26) de roulement interne jusqu'à environ 1000 ·F. Dans une version, la portée comprend un chemin (26) de roulement interne produit dans un matériau présentant une faible ténacité, pour lequel un état compressif est souhaitable, tel qu'un matériau céramique.

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