Hollow structure with flange

Details Hollow structure with flange Hollow structure with flange

F - Mech Eng,Light,Heat,Weapons

23

R

F23R 3/42 (2006.01) F16L 23/00 (2006.01) F16L 23/24 (2006.01)

Patent

CA 2421802

The present invention provides a hollow structure with at least one flange which can eliminate the possibility of creating crackings due to the thermal fatigue, thereby improving the durability thereof. A hollow structure with an flange according to the present invention includes at least one annular flange fixedly attached around the hollow structure which has a temperature gradient in the direction of the thickness of the wall thereof, wherein said at least one annular flange including an outer portion formed of a metal material having a coefficient of linear expansion greater than that of the metal material forming another portion of said at least one annular flange.

La présente invention concerne une structure creuse à rebord qui permet d'accroître l'intégrité structurale du fait qu'elle empêche la fissuration due à la fatigue thermique autour d'un rebord. La structure comprend le rebord annulaire qui est fixé sur la surface périphérique externe de cette dernière et qui produit une différence de température dans le sens de l'épaisseur de la plaque, ledit rebord annulaire se caractérisant en ce qu'il comporte sur son bord externe, un matériau métallique dont le coefficient de dilatation linéaire est supérieur au coefficient de dilatation linéaire du matériau métallique situé autour du bord interne du rebord annulaire.

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