F - Mech Eng,Light,Heat,Weapons – 16 – J
Patent
F - Mech Eng,Light,Heat,Weapons
16
J
F16J 15/34 (2006.01)
Patent
CA 2420452
A mechanical end face seal comprising two relatively rotatable seal rings (18, 20), a resilient bellows (100) for providing a secondary seal between one seal ring and either a housing (12) or a rotating shaft (16) and a finger spring element (80) nested in the bellows. The resilient bellows comprises an elastomeric material, such as molded rubber, and has a single convolution having a general cross-sectional shape of an inverted "Omega". The finger spring member comprises a plurality of generally "U" shaped spring fingers (86) which provide the axial biasing force to urge the ring faces in sealing relation. In a preferred embodiment, the spring includes ferrules (82, 84) for providing radially inward force on a flange portion of each end of the bellows to maintain the secondary seal.
L'invention porte sur un joint mécanique de surface plane comprenant: deux bagues d'étanchéité à rotation relative (18, 20); un soufflet élastique (100) constituant un joint secondaire entre l'une des bagues d'étanchéité et soit un carter (12), soit un arbre tournant (16); et un ressort (80) à languettes logé dans le soufflet. Le soufflet, fait d'un élastomère tel que du caoutchouc moulé, présente une seule ondulation et une section transversale en .OMEGA. inversé. Le ressort à languettes comporte une série de languettes (86) sensiblement en U fournissant une poussée axiale qui assure l'étanchéité entre les faces des bagues. Dans l'exécution préférée, le ressort comporte des viroles (82, 84) développant une force radiale vers l'intérieur s'appliquant sur les parties planes extrêmes du soufflet pour assurer l'étanchéité du joint secondaire.
Borden Ladner Gervais Llp
John Crane Inc.
LandOfFree
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