초록 ▼

A sealing device for a turbomachine bearing chamber in which a bearing is mounted between a sleeve secured to a rotary shaft and a casing defining said bearing chamber, said sealing device comprising a labyrinth seal disposed on the sleeve at the junction with an adjacent air chamber, a static carbo

A sealing device for a turbomachine bearing chamber in which a bearing is mounted between a sleeve secured to a rotary shaft and a casing defining said bearing chamber, said sealing device comprising a labyrinth seal disposed on the sleeve at the junction with an adjacent air chamber, a static carbon ring which is not in contact with the shaft and is retained axially in position in a fixed annular support, and a rotary ring which is driven by the sleeve and which is centred without clamping on the sleeve by means of a ring seal and is retained axially in position by a flat annular spring, the rotary ring having a radial surface which faces and co-operates with a radial surface of the carbon ring and which is formed with lift grooves such that, during operation, a substantially frictionless sealing is effected between the two radial surfaces.

대표청구항 ▼

[ What is claimed is:] [1.] A sealing device for a bearing chamber in a turbomachine wherein a sleeve is rigidly secured to a rotary shaft and a rolling bearing is mounted between said sleeve and a casing defining an oil chamber in which said rolling bearing is located, said sealing device separatin

[ What is claimed is:] [1.] A sealing device for a bearing chamber in a turbomachine wherein a sleeve is rigidly secured to a rotary shaft and a rolling bearing is mounted between said sleeve and a casing defining an oil chamber in which said rolling bearing is located, said sealing device separating said oil chamber from an air chamber of said turbomachine and comprising:a labyrinth seal mounted on a portion of said sleeve which is disposed adjacent said air chamber;a static carbon ring having no contact with said shaft;a fixed annular support on which said static carbon ring is axially located;a first radial surface on said static carbon ring;a rotary ring connected to said sleeve so as to rotate therewith;a seal centering said rotary ring on said sleeve without clamping;annular spring means for retaining said rotary ring axially in position on said sleeve;and a second radial surface on said rotary ring facing and co-operating with said first radial surface on said static carbon ring;said second radial surface being provided with lift grooves whereby, during operation, a substantially frictionless sealing is effected between said first and second radial surfaces.