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US 2010/0143103 A1Published application
Seal and a method of manufacturing a seal
AssigneeROLLS-ROYCE plc
InventorsChristopher Sellars, Glen Pattinson, John T. Gent
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AssigneeROLLS-ROYCE plc
InventorsChristopher Sellars, Glen Pattinson, John T. Gent
Estimating the term…
A seal (48) between a compressor rotor blade (26) and compressor casing (28) comprises an abradable structure (59) on the compressor casing (28). The abradable structure (59) comprises a metallic foam (60) having pores (66, 68). The metallic foam (60) has a first a region (62) and a second region (64). The first region (62) of the metallic foam (60) is arranged adjacent to the compressor casing (28) and the second region (64) of the metallic foam (60) is spaced from the compressor casing (28) by the first region (62) of the metallic foam (60). The pores (68) of the second region (64) of the metallic foam (60) contain an abradable material (70) and the pores (66) of the first region (62) of the metallic foam (60) do not contain an abradable material.
A seal between first and second relatively movable members, the seal comprising an abradable structure on at least one of the relatively movable members, the abradable structure comprising a metallic foam having pores, the metallic foam having a first region and a second region, the first region of the metallic foam being arranged adjacent to the at least one of the relatively movable members, the second region of the metallic foam being spaced from the at least one of the relatively movable members by the first region of the metallic foam, the pores of the second region of the metallic foam containing an abradable material and the pores of the first region of the metallic foam not containing an abradable material.
A method of manufacturing a seal between first and second relatively movable components, the method comprising bonding a metallic foam to at least one of the relatively movable members, the metallic foam having a first region and a second region, the first region of the metallic foam being arranged adjacent to the at least one of the relatively movable components, the second region of the metallic foam being spaced from the at least one of the relatively movable members by the first region of the metallic foam, filling the pores of the second region of the metallic foam with an abradable material and ensuring the pores of the first region of the metallic foam do not contain an abradable material.
Dependencies are inferred from the claim text.