CMC TURBINE STATOR BLADE

• US 20120009071A1
• Filed: 03/24/2010
• Published: 01/12/2012
• Est. Priority Date: 03/26/2009
• Status: Active Grant

• Current Assignee: IHI Corporation
• Original Assignee: IHI Corporation
• Inventors: Takahashi, Akira, Yagi, Hiroyuki, Tanahashi, Yosuke
• Granted Patent: US 8,926,262 B2
• Time in Patent Office: Days
• US Class Current: 416/241.B
• CPC Class Codes: F01D 11/005 Sealing means between non relatively rotating elements
• CPC Class Codes: F01D 5/282 Selecting composite materials, e.g. blades with reinforcing filaments
• CPC Class Codes: F01D 5/284 Selection of ceramic materials
• CPC Class Codes: F01D 9/042 fixing blades to stators fixing stator-rings in the casing or to each other F01D25/246
• CPC Class Codes: F05D 2300/603 Composites; e.g. fibre-reinforced
• CPC Class Codes: F16J 15/062 characterised by the geometry of the seat
• CPC Class Codes: Y02T 50/60 Efficient propulsion technologies, e.g. for aircraft

Abstract

A CMC turbine stator blade 1 includes a blade 2 of a ceramic matrix composite material formed or a metallic material, and a band 5 formed of a ceramic matrix composite material and supporting the blade 2. The blade 2 includes a first fitting portion 3 to which the band 5 is fitted outside. The band 5 includes a second fitting portion 7 to which the first fitting portion 3 is fitted inside. A flexible wire 8 is disposed between the fitting portions 3, 7 to fix the blade 2 and the band 5. A first groove 3a in the outer peripheral surface of the first fitting portion 3 extends in the front-to-rear direction of the blade 2. A second groove 7a in the inner peripheral surface of the second fitting portion 7a extends along the first groove 3a. The wire 8 is disposed between the grooves 3a,7a.

Claims

1. A CMC turbine stator blade comprising:

a blade which is formed of a ceramic matrix composite material; and

a band which is formed of a ceramic matrix composite material or a metallic material, and supports the blade,

wherein the blade and the band are bonded to each other,

the blade includes a first fitting portion to which the band is fitted at an outside thereof,

the band includes a second fitting portion to which the first fitting portion is fitted at an inside thereof,

a flexible wire is disposed between the first fitting portion and the second fitting portion so as to fix the blade and the band to each other, and

a first groove is formed in the outer peripheral surface of the first fitting portion to extend in a front-to-rear direction of the blade, a second groove is formed in the inner peripheral surface of the second fitting portion to extend along the first groove, and the wire is disposed between the first groove and the second groove.

2. The CMC turbine stator blade according claim 1,

wherein the first groove is formed in the outer peripheral surface of the first fitting portion at the belly and back sides of the blade, and

the second groove is formed in the inner peripheral surface of the second fitting portion at the belly and back sides of the blade.

3. The CMC turbine stator blade according claim 2,

wherein a first cutout portion is formed at a front edge part of the second fitting portion,

a second cutout portion is formed at the rear edge part of the second fitting portion, and

both ends of the wire protrude from one of the first cutout portion and the second cutout portion, and an intermidiate portion of the wire is folded back at the other of the first cutout portion and the second cutout portion.

4. The CMC turbine stator blade according to claim 1,

wherein end parts of the first fitting portion and the second fitting portion are adhered to each other.

5. The CMC turbine stator blade according to claim 2,

wherein end parts of the first fitting portion and the second fitting portion are adhered to each other.

6. The CMC turbine stator blade according to claim 3,

wherein end parts of the first fitting portion and the second fitting portion are adhered to each other.