Replaceable brush seal elements
The present invention relates to replaceable brush seal assemblies for use with turbines such as industrial gas turbines. In accordance with the present invention, a brush seal assembly comprises a flange, a brush seal mounted to the flange, and retainers preventing rotation of the brush seal relative to the flange. A method of repairing a brush seal having a back plate, side plate, and bristles is also disclosed. The method comprises the steps of removing the side plate and the bristles from the back plate, and securing a second brush seal to the back plate.
1. A brush seal assembly comprising a L-shaped flange having a groove formed in a lower surface and having a plurality of walls, a single brush seal mounted to said flange, said single brush seal having a back plate, and means for preventing rotation of said brush seal relative to said flange, said rotation preventing means comprising a tongue integrally formed with said back plate, and said tongue being in direct contact with said walls of said groove and having no shims between said tongue and said walls of said groove, and said flange being a back plate of a previous brush seal.
2. A brush seal assembly according to claim 1 , wherein said means for preventing rotation of said brush seal relative to said flange further comprises at least one axially oriented pin passing through holes in said flange and said tongue.
3. A brush seal assembly according to claim 2 , further comprising a plurality of pins passing through said tongue and said flange.
4. A brush seal assembly according to claim 1 , wherein said groove is an annular groove.
5. A brush seal assembly according to claim 1 , wherein said brush seal includes a side plate, and a plurality of wires intermediate said back plate and said side plate.
6. A brush seal assembly according to claim 1 , wherein said brush seal comprises a plurality of wires attached to said back plate, and said back plate has said tongue for engaging said groove and said tongue being slidable therein.
7. A brush seal assembly according to claim 6 , wherein said rotation preventing means further comprises a plurality of pins passing through said tongue and said flange.
8. A brush seal assembly comprising a L-shaped flange, a brush seal mounted to said flange, and means for preventing rotation of said brush seal relative to said flange, said means for preventing rotation of said brush seal relative to said flange comprises a U-shaped groove in a lower surface of said flange and said brush seal having a tongue without shims for engaging said groove, said groove having an opening in said lower surface, two planar opposed surfaces and an end surface, each of said planar surfaces extending from said opening to said end surface, said tongue having two opposed planar surfaces in direct contact with said two opposed planar surfaces of said groove and an end surface in direct contact with said end surface of said groove, said means for preventing rotation of said brush seal relative to said flange further comprising at least one axially oriented pin passing through said flange and said tongue, and each said pin comprising a locking spring pin.
9. A brush seal assembly comprising a L-shaped flange, a brush seal mounted to said flange, and means for preventing rotation of said brush seal relative to said flange, and said means for preventing rotation of said brush seal relative to said flange comprises a U-shaped groove in a lower surface of said flange, said groove having an opening in said lower surface at a first end, a first planar surface extending from said opening to an end wall, and a second planar surface spaced apart from and parallel to said first surface, said second planar surface extending from said opening to said end wall, said brush seal having a back plate with an integrally formed tongue for directly contacting said groove, and said tongue having a first tongue surface in direct contact with said first surface of said groove and a second tongue surface in direct contact with said second surface of said groove, said means for preventing rotation of said brush seal relative to said flange further comprises at least one pin passing through said flange and said tongue, and wherein each said pin is oriented axially.
10. A brush seal assembly comprising a L-shaped flange having a groove formed in a lower surface and having a plurality of walls, a single brush seal mounted to said flange, said single brush seal having a back plate, and means for preventing rotation of said brush seal relative to said flange, said rotation preventing means comprising a tongue integrally formed with said back plate, and said tongue being in direct contact with said walls of said groove and having no shims between said tongue and said walls of said groove, and said flange being a back plate of a previous brush seal, wherein said brush seal comprises a plurality of wires attached to said back plate, and said back plate has said tongue for engaging said groove and said tongue being slidable therein, wherein said rotation preventing means further comprises a plurality of pins passing through said tongue and said flange, and wherein said tongue and groove are oriented radially and said pins are oriented axially.