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Composite turbine bucket assembly

A composite, turbine blade technology, applied in blade support elements, engine elements, machines/engines, etc., to solve problems such as not allowing metal alloy blades to be directly replaced on site

Active Publication Date: 2011-10-12
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nonetheless, current systems do not allow direct field replacement of metal alloy blades with CMC blades on existing metal discs or rotors without undue cost and considerable additional complexity

Method used

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  • Composite turbine bucket assembly
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Examples

Experimental program
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Embodiment Construction

[0011] One exemplary but non-limiting embodiment relates to a novel adapter mechanism for attaching a ceramic turbine airfoil to a metal turbine disk or rotor. As explained further below, the transition mechanism or assembly allows for a lower cost CMC airfoil or blade with a minimum of features and accessories, thereby greatly reducing both complexity and cost. Furthermore, the designs disclosed herein allow ceramic blades to be substituted for metal blades without compromising existing rotor system designs. The transition assembly (through which the ceramic blades are attached to the turbine disk or rotor) consists of two or more metal transition parts fixed together with the CMC blades between them. More specifically, the components of the transition assembly are clamped together directly with one or more bolts or other suitable fasteners at a location radially inward of the ceramic blade, i.e. the bolts or other fasteners do not pass through the ceramic blade. blade. The...

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PUM

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Abstract

The invention relates to a composite turbine bucket assembly. The composite turbine blade assembly includes a ceramic blade including an airfoil portion, a shank portion and an attachment portion; and a transition assembly adapted to attach the ceramic blade to a turbine disk or rotor, the transition assembly including first and second transition components clamped together, trapping said ceramic airfoil therebetween. Interior surfaces of the first and second transition portions are formed to mate with the shank portion and the attachment portion of the ceramic blade, and exterior surfaces of said first and second transition components are formed to include an attachment feature enabling the transition assembly to be attached to the turbine rotor or disk.

Description

technical field [0001] This invention was made with Government support under Contract No. DE-FC26-05NT42643 awarded by the Department of Energy. The government has certain rights in this invention. [0002] The present invention relates to gas turbine blades or buckets, and more particularly, to an adapter assembly that enables attachment of ceramic matrix composite (CMC) turbine blades to metallic turbine disks or rotors. Background technique [0003] Current methods used to attach CMC blades to metal turbine disks or rotors include the use of mechanical devices such as bolts that directly attach ceramic blades to the rotor system. Alternatively, the turbine disk or rotor could be specially designed with a CMC system in mind. Nonetheless, current systems do not allow direct field replacement of metal alloy blades with CMC blades on existing metal discs or rotors without undue cost and considerable additional complexity. Therefore, there remains a need for a simple and co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D5/14F01D5/30F01D5/28
CPCF01D5/147F01D5/282F01D5/3007F01D5/3084F05D2230/51F05D2300/6033
Inventor G·C·利奥塔A·加西亚-克雷斯波
Owner GENERAL ELECTRIC CO