# US 9,752,445 B2 · Method for producing coupled turbine vanes, and turbine vanes

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- Number: US 9,752,445 B2
- Document ID: US9752445B2
- Status: Granted
- Kind: B2
- Application number: 14/479,593
- Filed: 2014-09-08
- Published: 2015-01-01
- Granted: 2017-09-05
- Earliest claimed: 2012-04-10
- Assignees: IHI Corporation
- Applicants: IHI Corporation
- Inventors: Fumiaki Watanabe
- Web page: https://patentgrep.com/patent/US9752445B2

## CPC

- F01D 9/02: Nozzles; Nozzle boxes; Stator blades; Guide conduits {, e.g. individual nozzles (nozzle boxes F01D9/047)}
- F01D 5/225: {by shrouding}
- F01D 5/282: {Selecting composite materials, e.g. blades with reinforcing filaments}
- F01D 9/042: {fixing blades to stators (fixing stator-rings in the casing or to each other F01D25/246)}
- F05D 2230/50: Building or constructing in particular ways
- F05D 2300/601: Fabrics
- F05D 2300/6033: Ceramic matrix composites [CMC]
- Y02T 50/60: Efficient propulsion technologies, e.g. for aircraft
- Y10T 29/49321: Assembling individual fluid flow interacting members, e.g., blades, vanes, buckets, on rotary support member
- Y10T 29/49337: Composite blade
- F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D)
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Coupled turbine vanes having an axis are produced by arranging a plurality of first fabrics of ceramic fibers in radial directions relative to the axis to constitute a plurality of vane sections, arranging a second fabric of the ceramic fibers in a circumferential direction relative to the axis, connecting the first fabrics with the second fabric by bending first ends of the first fabrics to lay them on the second fabric in parallel, and impregnating the plurality of first fabrics connected with the second fabric with the matrix.

## Claims

### Claim 1

A method for producing coupled vanes of a turbine having an axis, comprising:
arranging a plurality of first fabrics of ceramic fibers in radial directions relative to the axis to form a plurality of vane sections;
arranging a second fabric of the ceramic fibers in a circumferential direction relative to the axis;
connecting the first fabrics with the second fabric by bending and laying first ends of the first fabrics on the second fabric in parallel;
laying third fabrics of the ceramic fibers, each of the third fabrics having a flange section, on the first fabrics;
bending the flange sections to make ends of the flange sections overlap with each other and to make the flange sections form a platform section;
incorporating the first fabrics connected with the second fabric into a mold to mold the first and second fabrics into a unitary body; and
impregnating the plurality of first fabrics and the second fabric molded into the unitary body with a matrix.

### Claim 2 (depends on 1)

The method of claim 1, wherein the second fabric has a shape of a tip shroud section or an outer band section.

### Claim 3 (depends on 1)

The method of claim 1, wherein the second fabric has through-holes allowing passage of the first ends, further comprising:
getting the first ends through the through-holes before the step of connecting.

### Claim 4 (depends on 1)

The method of claim 1, further comprising:
arranging a fourth fabric of the ceramic fibers in the circumferential direction relative to the axis; and
bending and laying second ends of the first fabrics on the fourth fabric before the step of impregnating.

### Claim 5 (depends on 1)

The method of claim 1, wherein the ceramic fibers do not include the matrix before the step of impregnating.

### Claim 6

Coupled vanes of a turbine having an axis, comprising:
a plurality of vane sections comprising a plurality of first fabrics of ceramic fibers arranged in radial directions relative to the axis;
a tip shroud section or an outer band section, wherein a second fabric of the ceramic fibers is arranged in a circumferential direction relative to the axis; and
a platform section wherein third fabrics of the ceramic fibers, each of the third fabrics having a flange section, are laid on the first fabrics, and the flange sections are bent to make ends of the flange sections overlap with each other and to make the flange sections form the platform section,
wherein the first fabrics are connected with the second fabric by bending and laying first ends of the first fabrics on the second fabric in parallel,
wherein the first and second fabrics are molded into a unitary body by incorporating the first fabrics connected with the second fabric into a mold, and
wherein the plurality of first fabrics and the second fabric molded into the unitary body is impregnated with a matrix.