Repair system and method for repairing cavitation damage for a fuel pump

Patent metadata

Field	Value
Publication number	US-11020826-B2
Application number	US-201916271277-A
Country	US
Kind code	B2
Filing date	Feb 8, 2019
Priority date	Feb 8, 2019
Publication date	Jun 1, 2021
Grant date	Jun 1, 2021

Abstract

A method for repairing damage to a fuel pump assembly of a locomotive is provided that includes identifying a void within a fluid cavity of a fuel pump assembly. After identifying the void within the fluid cavity of the fuel pump assembly, the void is cleaned with a cleaning product, and a filler material is inserted within the void. Then the filler material is laser welded to repair the void. After being laser welded, the fluid cavity of the fuel pump assembly is honed.

First claim

What is claimed is:

1. A method for repairing damage to a fuel pump assembly, the method comprising:
identifying a void within an inner wall of a fluid cavity of the fuel pump assembly of a vehicle;
directing a laser beam into the fuel cavity to reshape the inner wall of the fuel cavity; and
pulsing the laser beam on the void to repair the void.

2. The method of claim 1 , further comprising:
applying a filler material in the void to prepare the void prior to pulsing the laser beam on the void.

3. The method of claim 2 , wherein the filler material is a stainless steel material.

4. The method of claim 2 , further comprising:
before filling the void with a filler material, cleaning the inner wall of the fluid cavity of the fuel pump assembly.

5. The method of claim 4 , wherein cleaning the inner wall of the fluid cavity of the fuel pump assembly includes placing acetone on the void.

6. The method of claim 4 , further comprising:
before cleaning the inner wall of the fluid cavity of the fuel pump assembly, removing debris from within the fluid cavity.

7. The method of claim 6 , wherein removing debris from within the fluid cavity includes cutting a damaged portion of the fluid cavity.

8. The method of claim 4 , further comprising:
honing the fluid cavity with a honing device after pulsing the laser beam on the void.

9. The method of claim 1 , wherein pulsing the laser beam on the void to repair the void includes pulsing the laser beam during a first period to prepare the void and pulsing the laser beam after the first period during a second period to repair the void.

10. The method of claim 9 , wherein an interval is provided between the first period and the second period.

11. The method of claim 1 , wherein the laser beam is emitted by a yttrium aluminum garnet based laser.

12. The method of claim 11 , wherein the laser beam has a wavelength in a range between 900 nm and 1200 nm.

13. The method of claim 12 , wherein the laser beam has a wavelength of 1064 nm.

14. The method of claim 11 , wherein the yttrium aluminum garnet based laser has a power source of between 75 Watts and 150 Watts.

15. A system for repairing damage in a fuel pump assembly of a vehicle comprising:
a cutting assembly configured to remove damage from an inner wall of a fuel cavity;
a laser welding device configured to emit and direct a laser beam into the fuel cavity to reshape the inner wall of the fuel cavity; and
a honing device configured to remove excess filler in the fuel cavity.

16. The system of claim 15 , wherein the fuel cavity is less than an inch in diameter.

17. The system of claim 15 , wherein the laser welding device includes a yttrium aluminum garnet based laser.

18. A method for repairing damage to a fuel pump assembly of a vehicle, the method comprising:
identifying damage in a fluid cavity of the fuel pump assembly of the vehicle;
removing debris from within the fluid cavity of the fuel pump assembly to form at least one void within an inner wall of the fluid cavity;
directing a laser beam into the fuel cavity to reshape the inner wall of the fuel cavity;
pulsing the laser beam on the at least one void during a first period to clean the void; and
pulsing the laser beam on the void during a second period to reshape and repair the inner wall of the fluid cavity.

19. The method of claim 18 , wherein removing debris from within the fluid cavity includes cutting a damaged portion of the fluid cavity.

20. The method of claim 18 , wherein no filler material is utilized to repair the fluid cavity.

Assignees

• Gen Electric
• Transp Ip Holdings Llc

Inventors

• Brigden Jesse A
• Britton Neal E
• Harter Harold David
• Schreiner James

Classifications

• B23K2103/05

  Stainless steel · CPC title

• B23P6/00 Primary

  Restoring or reconditioning objects (straightening or restoring form of sheet metal, metal rods, metal tubes, metal profiles, or specific articles made therefrom B21D1/00, B21D3/00; repairing defective or damaged objects by casting techniques B22D19/10) · CPC title

• F02M2200/80

  Fuel injection apparatus manufacture, repair or assembly · CPC title

• B23K26/34 Primary

  Laser welding for purposes other than joining · CPC title

• B23K26/211

  with interposition of special material to facilitate connection of the parts · CPC title