Sealing device

A seal assembly for effecting a seal between two machine components the clearance between which may vary slightly, which assembly comprises a housing attached to or forming a part of one of the machine components and defining a channel facing the surface to be sealed of the other component, a seal member slidably mounted in the channel for movement towards and away from said surface, and spring means disposed in said channel and arranged to urge the brush seal member towards said surface of the other component, characterized in that the seal member is in the form of a brush seal member comprising a plurality of closely-packed bristles the free tips of which are adapted to bear on and effect a seal against said surface, in that the spring means allows the brush seal member to accommodate dynamically minor variations in the clearance between the two components by movement of the seal member against the spring bias provided by the spring means, and in that the housing defines an annular channel, the brush seal member is annular and there is provided an endless ring within the channel which ring encircles the brush seal member, the spring means being disposed between and acting on said ring and the brush seal member.

A seal assembly for effecting a seal between two machine components the clearance between which may vary slightly, which assembly comprises a housing attached to or forming a part of one of the machine components and defining a channel facing the surface to be sealed of the other component, a seal member slidably mounted in the channel for movement towards and away from said surface, and spring means disposed in said channel and arranged to urge said seal member toward said surface of the other component, characterized in that said seal member is formed in several pieces arranged end-to-end in a relatively movable manner, each said piece being in the form of a brush seal member comprising a plurality of closely-packed bristles the free tips of which are adapted to bear on and effect a seal against said surface, the bristles of one piece overlapping the bristles of the next adjacent piece in the region of a Junction between the two pieces, and further characterized in that the spring means allows said pieces of the brush seal member to accommodate dynamically minor variations in the clearance between the two components by movement of the seal member against the spring bias provided by the spring means.

A seal assembly for effecting a seal between two machine components the clearance between which may vary slightly, which assembly comprises a housing attached to or forming a part of one of the machine components and defining a channel facing the surface to be sealed of the other component, a seal member slidably mounted in the channel for movement towards and away from said surface, and spring means disposed in said channel and arranged to urge said seal member towards said surface of the other component, characterized in that the seal member is in the form of a brush seal member comprising a plurality of closely-packed bristles arranged in two layers disposed immediately side-by-side, the free tips of which bristles are adapted to bear on and effect a seal against said surface, and the bristles of one layer extending at an acute angle to the surface to be sealed and the bristles of the other layer extending at a similar, but oppositely-directed, acute angle to said surface, and further characterized in that the spring means allows the brush seal member to accommodate dynamically minor variations in the clearance between the two components by movement of the seal member against the spring bias provided by the spring means.

A seal assembly for effecting a seal between two machine components the clearance between which may vary slightly, which assembly comprises a housing attached to or forming a part of one of the machine components and defining a channel facing the surface to be sealed of the other component, a seal member slidable mounted in the channel for movement towards and away from said surface, the seal member being in the form of a brush seal member comprising a plurality of closely-packed bristles the free tips of which are adapted to bear on and effect a seal against said surface, retention means to retain the brush seal member in the channel of the housing, and spring means disposed in said channel and arranged to urge said seal member towards said surface of the other component, the spring means allowing the brush seal member to accommodate dynamically minor variations in the clearance between the two components by movement of the seal member against the spring bias provided by the spring means.