Mechanical split double seals

Details Mechanical split double seals Mechanical split double seals

F - Mech Eng,Light,Heat,Weapons

16

J

F16J 15/46 (2006.01)

Patent

CA 2221477

Split mechanical seal assemblies which include a pressurized fluid barrier and multiple concentric and axially aligned stationary seal rings. The stationary seal rings are in sealing relation with a rotary seal ring at their respective seal faces, and with the gland of the mechanical seal assembly, thereby forming an annular cavity for pressurized fluid to create a positive fluid pressure barrier across the seal faces when in sealing contact with each other. The axially and concentrically aligned stationary seal rings comprise an inner stationary seal ring and an outer stationary seal ring, and the area of the axially extending portion of the outer surface of the outer seal ring partially defining the annular cavity is greater than the area of the axially extending portion of the inner surface of the outer seal ring partially defining the annular cavity. The split configuration of the seal assembly facilitates quick installation, removal and maintenance of the seal assembly and its component parts. The seal assembly is also compact in design on account of the concentric and axially aligned stationary seal rings, permitting installation and maintenance of the assembly and its component parts under circumstances where space is limited. These benefits are provided without sacrificing the function benefits of a pressurized fluid pressure barrier as a supplement to the seal between the stationary and rotary seal rings.

Garniture d'étanchéité formée de deux demi-raccords circulaires comprenant une barrière de fluide pressurisé et de nombreux anneaux d'étanchéité fixes concentriques alignés axialement. Les anneaux d'étanchéité fixes sont en relation d'étanchéité avec un anneau rotatif sur leur face d'étanchéité respective et avec un presse-garniture de la garniture, formant ainsi une cavité annulaire pour le fluide pressurisé de façon à créer une barrière positive de fluide pressurisé à travers les surfaces d'étanchéité lorsqu'elles sont en contact. Les anneaux fixes comprennent un anneau intérieur et un anneau extérieur, et la région de la partie axiale de la surface extérieure de l'anneau extérieur définissant partiellement la cavité annulaire est plus grande que celle de la partie axiale de la surface intérieure de l'anneau extérieur définissant partiellement la cavité annulaire. La configuration de la garniture facilite une installation, un démontage et un entretien rapides de la garniture et de ses éléments constitutifs. La garniture est également de conception compacte grâce aux anneaux fixes alignés de manière concentrique et axiale, permettant l'installation et l'entretien de la garniture et de ses éléments constitutifs là où l'espace est limité. Ces avantages sont fournis sans sacrifier les avantages d'une barrière de fluide pressurisé en tant que supplément à l'étanchéité entre les anneaux fixes et rotatifs.

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