# US 11,898,466 B2 · Method for coating a turbomachine guide vane, associated guide vane

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- Number: US 11,898,466 B2
- Document ID: US11898466B2
- Status: Granted
- Kind: B2
- Application number: 17/619,505
- Filed: 2020-06-18
- Published: 2022-07-28
- Granted: 2024-02-13
- Earliest claimed: 2019-06-20
- Assignees: Safran Aircraft Engines
- Applicants: Safran Aircraft Engines
- Inventors: Célia Iglesias Cano; Vincent Marie Jacques Rémi De Carné-Carnavalet; Antoine Hubert Marie Jean Masson
- Web page: https://patentgrep.com/patent/US11898466B2

## CPC

- F01D 9/041: {using blades (F01D5/148 takes precedence)}
- F01D 5/282: {Selecting composite materials, e.g. blades with reinforcing filaments}
- F01D 5/288: {Protective coatings for blades}
- F05D 2230/31: Layer deposition
- F05D 2230/90: Coating; Surface treatment
- F05D 2240/121: related to the leading edge of a stator vane
- F05D 2240/122: related to the trailing edge of a stator vane
- F05D 2250/11: triangular
- 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

## Abstract

A method for coating a turbomachine guide vane including a root and a tip, an extrados face and an intrados face connected to one another by a leading edge and a trailing edge, the method including completely covering one of the faces of the vane with a polymer coating of thickness (e1) provided with grooves, removing the grooves from a part of the polymer coating in such a way that the polymer coating includes a grooved zone and a non-grooved zone, coating the non-grooved zone with a coat of paint of thickness (e3) such that the thickness of the coat of paint superimposed on the non-grooved zone is substantially equal to the thickness (e1) of the grooved zone.

## Claims

### Claim 1

A method for coating a turbomachine guide vane comprising a root and a tip, an extrados face and an intrados face connected to one another by a leading edge and a trailing edge, the method comprising:
completely covering one of the extrados and intrados faces of the vane with a polymer coating of first thickness (e1) provided with grooves,
removing the grooves from a part of the polymer coating in such a way that the polymer coating comprises a grooved zone and a non-grooved zone, and
coating the non-grooved zone with a coat of paint of thickness (e3) such that the thickness of the coat of paint superimposed on the non-grooved zone is equal to the thickness (e1) of the grooved zone.

### Claim 2 (depends on 1)

The method for coating according to claim 1, wherein the removing of the grooves is carried out by a sanding operation on a part of the polymer coating intended to form the non-grooved zone.

### Claim 3 (depends on 2)

The method for coating according to claim 2, wherein the sanding operation is carried out at a pressure greater than 2.5 bars.

### Claim 4 (depends on 1)

The method for coating according to claim 1, wherein, prior to the removing, the method for coating further comprises depositing a protective film on a part of the polymer coating intended to form the grooved zone.

### Claim 5

A turbomachine guide vane comprising a root and a tip, an extrados face and an intrados face connected to one another by a leading edge and a trailing edge, wherein:
at least one of the extrados and intrados faces is completely covered with a continuous polymer coating comprising:
a grooved zone of thickness (e1),
a non-grooved zone of thickness (e2) less than the thickness (e1) of the grooved zone, said continuous polymer coating forming said grooved zone and said non-grooved zone,
a coat of paint, of thickness (e3), covers the non-grooved zone such that the thickness of the coat of paint superimposed on the non-grooved zone is equal to the thickness (e1) of the grooved zone.

### Claim 6 (depends on 5)

The turbomachine guide vane according to claim 5, wherein the polymer coating is made of polyurethane.

### Claim 7 (depends on 5)

The turbomachine guide vane according to claim 5, wherein the coat of paint is made of polyurethane.

### Claim 8 (depends on 5)

The turbomachine guide vane according to claim 5, wherein the coat of paint extends onto the extrados face, along the root of the vane.

### Claim 9 (depends on 8)

The turbomachine guide vane according to claim 8, wherein the coat of paint extends onto the extrados face, along the leading edge.

### Claim 10 (depends on 5)

A turbomachine guide vane, comprising at least one vane according to claim 5.

### Claim 11 (depends on 5)

The turbomachine guide vane according to claim 5, wherein the non-grooved zone is obtained by removing grooves formed in a part of the polymer coating that completely covers the at least one of the extrados and intrados faces in such a way that the polymer coating comprises said grooved zone and said non-grooved zone.