Ring-shaped seal

Details Ring-shaped seal Ring-shaped seal

F - Mech Eng,Light,Heat,Weapons

16

J

F16J 15/34 (2006.01) F16J 15/32 (2006.01) F16J 15/48 (2006.01)

Patent

CA 2433326

The invention relates to a seal, located between a radially inwardly-facing external limiting surface of a ring-shaped sealing gap and a radially outwardly-facing internal limiting surface of the sealing gap. The seal has a sealing ring (4) comprising a sealing surface (8) that lies tightly against one of the limiting surfaces (14) of the sealing gap (16). A contact surface (38) forms an intermediate chamber having a wedge-shaped cross-section with the other (40) limiting surface of the sealing gap (16) on the side of the sealing ring (4) lying radially opposite the sealing surface (8). The seal also has a thrust collar (6), which is at least intermittently pretensioned in the intermediate chamber by a pretensioning element (24) against the other (40) limiting surface of the sealing gap (16) and against the contact surface (38), in order to press the sealing surface (8) against the first limiting surface (14) of the sealing gap (16).

L'invention concerne un joint disposé entre une périphérie extérieure orientée radialement vers l'intérieur d'un espace d'étanchéité annulaire et une périphérie intérieure orientée radialement vers l'extérieur de ce même espace d'étanchéité. Le joint est caractérisé en ce qu'un anneau d'étanchéité (4) a une surface d'étanchéité (8) qui adhère à l'une des périphéries (14) de l'espace d'étanchéité (16), et que cet anneau a une surface d'appui (38) qui forme un espace de section conique avec l'autre (40) périphérie de l'espace d'étanchéité (16), sur la face de l'anneau d'étanchéité (4) radialement opposée à la surface d'étanchéité (8). Selon l'invention, un cône de serrage (6) est, au moins temporairement, précontraint dans l'intervalle contre la deuxième (40) périphérie de l'espace d'étanchéité (16) et contre la surface d'appui (38), par un moyen de précontrainte (24), afin de presser la surface d'étanchéité (8) contre la première périphérie (14) de l'espace d'étanchéité (16).

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