Ferrule with relief to reduce galling

Details Ferrule with relief to reduce galling Ferrule with relief to reduce galling

Category

F - Mech Eng,Light,Heat,Weapons

Subcategory

16

Subsubcategory

L

IPC codes

F16L 19/10 (2006.01)

Type

Patent

Patent number

CA 2286021

Description

High localized loading, galling, and high torque forces have been generally eliminated or greatly reduced in a two ferrule tube fitting assembly through suitable modification of the rear ferrule so as to redirect the reaction forces acting between the front ferrule and the drive nut. The rear ferrule (22') has a cylindrical interior wall that closely surrounds the tube end and is provided on the interior cylindrical wall with a circumferentially continuous radial recess (40) that is located between the nose (52) and rear wall (28') of the rear ferrule. The rear ferrule also has a radially external wall (50) that is substantially conical and additionally shaped to extend radially outward toward the enlarged diameter portion or flange (26) of the rear ferrule. The rear ferrule further includes a contoured face on the rear driven surface of the ferrule that engages the drive surface of the drive nut.

On a généralement réussi à éliminer, ou à diminuer fortement la charge localisée dans le haut, le grippage et les forces de couple élevées dans un ensemble d'adaptation de tube à deux férules grâce à une modification appropriée de la férule réelle de façon à renvoyer les force de réaction s'exerçant entre la férule antérieure et l'écrou menant. La férule postérieure (22') comporte une paroi intérieure cylindrique pourvue d'une gorge radiale périphérique continue (40) qui se trouve entre le pointe (52) et la paroi postérieure (28') de la férule postérieure. Cette férule postérieure comporte également une paroi radialement extérieure (50) qui est sensiblement conique et qui est additionnellement fermée de façon à se prolonger radialement à l'extérieur vers la partie à diamètre agrandi ou bride (26) de la férule postérieure. La férule postérieure comporte en outre sur la surface postérieure menée de la férule une face détourée vient eu contact de la surface menante de l'écrou menant.

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