Composite rotatable assembly for an axial-flow compressor
AssigneeRolls-Royce North American Technologies Inc.
InventorEdward C. Rice
Life of this patent
Estimating the term…
Abstract
A composite rotatable assembly for an axial flow compressor comprises a spool having a plurality of blade assemblies arranged in stages on the spool and attached thereto by a wound band. Each blade assembly comprises a blade and a base, with the base having a forward tang extending axially forward of a leading edge of the blade and an aft tang extending axially aft of a trailing edge of the blade. The band is wound over at least a portion of the forward and aft tangs of the plurality of blade assemblies to hold the blade assemblies to the spool under centrifugal loading. An abradable layer may be added over the wound band.
Claims19
A composite turbomachine comprising:
- a spool comprised of fiber and resin;
- a plurality of blade assemblies, each one of the plurality of blade assemblies comprising:
- a blade having a tip, a root, a leading edge, and a trailing edge, the blade mounted to a base at the root;
- a forward tang and an aft tang extending from the base;
- wherein the forward tang extends forward of the leading edge proximate the root and the aft tang extends aft of the trailing edge proximate the root;
- and
- wherein the plurality of blade assemblies are arranged circumferentially around the spool at a first axial location, each interlocking with an adjacent blade assembly and retained in position by a band overwrapping the forward tangs and a second band overwrapping the aft tangs forming a first stage.
A method of manufacturing a turbo machine comprising:
- winding fibers and resin over a mandrell to form a spool;
- attaching a plurality of blade assemblies circumferentially around the spool at a first axial location, where each of the blade assemblies have a blade and a forward tang extending forward of the blade;
- winding fibers and resin around the spool and over at least the forward tang of each blade assembly;
- and,
- curing the fibers and resin.
A rotatable assembly for an axial flow compressor comprising:
- a spool adapted to be rotatable about an axis of rotation;
- a plurality of blade assemblies comprising a blade coupled to a platform member, the platform member having a forward tang extending axially forward of a leading edge of the blade and an aft tang extending axially aft of a trailing edge of the blade, wherein the plurality of blade assemblies are circumferentially arranged on the spool in stages;
- and
- a wound band which at least partially covers the forward tang and the aft tang of each of the plurality of blade assemblies.
Dependencies are inferred from the claim text.