Method of removing an abradable shroud assembly for turbomachine

Details Method of removing an abradable shroud assembly for turbomachine Method of removing an abradable shroud assembly for turbomachine

1996-05-20

1997-09-02

Turner, Archene

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156298, 1563096, 1563099, 156320, 156321, 156322, 156313, B32B 300

Patent

active

056627572

ABSTRACT:
A bonded assembly which includes a heating element in thermal contact with the adhesive component of the bonded assembly, such that the heating element can serve to thermally degrade the adhesive so as to allow disassembly, repair and servicing of the bonded assembly. The invention is particular suited for use in an abradable shroud assembly used in the fan section of a turbomachine, such as a high bypass turbofan engine. The abradable shroud assembly includes an abradable material bonded to the fan casing with an adhesive material having a known thermal degradation temperature. Placed in thermal contact with the adhesive layer is a heating element, such that the heating element is capable of heating the adhesive to a temperature above its thermal degradation temperature. As such, the adhesive can be heated with the heating element to a temperature sufficient to thermally degrade the adhesive, and thereby permit removal of the abrasive material without first requiring disassembly the engine and without the use of powered machine tools to forcibly remove the abradable material.

REFERENCES:
patent: 3825371 (1974-07-01), Roder et al.
patent: 3843278 (1974-10-01), Torell
patent: 4460185 (1984-07-01), Grandey
patent: 5240645 (1993-08-01), Strecker
patent: 5264059 (1993-11-01), Jacaruso et al.

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