Seal structure for casing

Details Seal structure for casing Seal structure for casing

F - Mech Eng,Light,Heat,Weapons

04

B

F04B 39/00 (2006.01) F04B 39/12 (2006.01) F04C 23/00 (2006.01) F04C 29/00 (2006.01)

Patent

CA 2264149

An upper casing (2a) is fitted onto a lower casing (2b). An inner wall surface (2a1) of the upper casing (2a) is provided with a recess (2a2) which receives therein a peripheral edge (5a) of a housing (5). Selectively formed on a bottom surface of the recess (2a2) is a projection (2a3), which deforms, when the upper casing (2a) is shrinkage fitted or press fitted, to suppress deformation of the housing (5). Provided between the housing (5) and the lower casing (2b) is a gap (14) for reducing a degree of pressing by a casing (2) against the housing (5) when the upper casing (2a) and the lower casing (2b) are welded to each other.

Dans cette invention, un boîtier supérieur (2a) est monté sur un boîtier inférieur (2b). La surface de la paroi interne (2a1) du boîtier supérieur (2a) comprend un renfoncement (2a2) dans lequel vient se loger le bord périphérique (5a) d'un enceinte (5). Une protubérance (2a3), formée de manière sélective à la surface du fond du renfoncement (2a2), va se déformer lorsque le boîtier supérieur (2a) est monté en contraction ou en force, ceci de manière à empêcher la déformation de l'enceinte (5). Entre l'enceinte (5) et le boîtier inférieur (2b) se trouve un espace (14) qui va réduire le niveau de pression exercé par le boîtier (2) contre ladite enceinte (5) lorsque le boîtier supérieur (2a) et le boîtier inférieur (2b) sont soudés l'un à l'autre.

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