US2009255102A1PendingUtilityA1

Repair of fuel nozzle component

63
Assignee: MCMASTERS MARIE ANNPriority: Apr 11, 2008Filed: Apr 6, 2009Published: Oct 15, 2009
Est. expiryApr 11, 2028(~1.7 yrs left)· nominal 20-yr term from priority
Inventors:Marie Ann McmastersMichael A. BenjaminAlfred Albert Mancini
Y02P10/25F23R 2900/00018F23D 2213/00F23D 11/38F23R 3/28F02C 7/222F23C 7/004F23R 3/343F23R 3/286F23R 3/283F23R 3/14B23P 6/00Y02E30/30Y10T29/4932Y10T137/265B23P 6/005B22F 2007/068F23D 2900/00018B33Y 80/00B23P 2700/13B23P 6/007F23D 2900/14701Y02T50/60Y10T29/49746Y10T29/49318
63
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Claims

Abstract

A method of repairing a fuel nozzle is disclosed comprising the steps of preparing a damaged component for repair; directing thermal energy towards a substrate; directing a stream of powder material; and depositing the powder material onto the substrate.

Claims

exact text as granted — not AI-modified
1 . A method of repairing a fuel nozzle comprising the steps of:
 preparing a damaged component for repair without removing from the fuel nozzle assembly;   directing thermal energy towards a substrate;   directing a stream of powder material from a dispenser; and   depositing the powder material onto the substrate.   
   
   
       2 . A method of repairing according to  claim 1  wherein the step of directing thermal energy comprises using energy from a laser source. 
   
   
       3 . A method of repairing according to  claim 1  wherein the step of directing thermal energy comprises using energy from a plasma. 
   
   
       4 . A method of repairing according to  claim 1  the step of depositing the powder material onto the substrate comprises laser cladding. 
   
   
       5 . A method of repairing according to  claim 1  the step of depositing the powder material onto the substrate comprises laser net shape manufacturing. 
   
   
       6 . A method of repairing according to  claim 1  the step of directing a stream of powder material comprises dispersing powder material from a plurality of dispensers. 
   
   
       7 . A method of repairing according to  claim 1  the step of directing thermal energy comprises using thermal energy from a plurality of sources. 
   
   
       8 . A method of repairing according to  claim 1  the step of preparing a damaged component comprises the step of cutting a portion of the damaged component. 
   
   
       9 . A method of repairing according to  claim 1  further comprising the step of digitally modeling the geometry of the component in undamaged state. 
   
   
       10 . A method of repairing according to  claim 1  wherein the damaged component comprises a heat shield. 
   
   
       11 . A method of repairing according to  claim 1  wherein the damaged component is a venturi. 
   
   
       12 . A method of repairing according to  claim 1  wherein the powder material has substantially the same composition as the damaged component. 
   
   
       13 . A method of repairing a heat shield in a fuel nozzle assembly comprising the steps of:
 preparing the heat shield for repair without removing from the fuel nozzle assembly;   directing thermal energy towards a substrate of the heat shield;   directing a stream of powder material from a dispenser; and   depositing the powder material onto the substrate.   
   
   
       14 . A method of repairing according to  claim 1  the step of preparing the heat shield comprises the step of removing a portion of the heat shield. 
   
   
       15 . A method of repairing according to  claim 13  wherein the powder material has substantially the same composition as the heat shield. 
   
   
       16 . A method of repairing according to  claim 13  wherein the heat shield forms a portion of a venturi in the fuel nozzle assembly. 
   
   
       17 . A method of repairing according to  claim 13  wherein the step of depositing the powder material is performed such that the direction of thickness build-up of the heat shield is substantially axial. 
   
   
       18 . A method of repairing according to  claim 13  wherein the step of depositing the powder material is performed such that the direction of thickness build-up of the heat shield is substantially radial. 
   
   
       19 . A method of repairing according to  claim 13  wherein the deposited material is selected from the group comprising metals, metal alloys and ceramics. 
   
   
       20 . A method of repairing according to  claim 13  wherein the deposited material comprises more than one material. 
   
   
       21 . A method of repairing a venturi in a fuel nozzle assembly comprising the steps of:
 preparing the venturi for repair;   removing a damaged portion of the venturi;   directing thermal energy towards a substrate of the venturi;   directing a stream of powder material from a dispenser; and   depositing the powder material onto the substrate.   
   
   
       22 . A method of repairing according to  claim 21  wherein the deposited material is selected from the group comprising metals, metal alloys and ceramics. 
   
   
       23 . A method of repairing according to  claim 21  wherein the step of directing thermal energy comprises using energy from a laser source.

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