System and method for polishing airfoils

Patent metadata

Field	Value
Publication number	US-2016167197-A1
Application number	US-201615048622-A
Country	US
Kind code	A1
Filing date	Feb 19, 2016
Priority date	Oct 29, 2013
Publication date	Jun 16, 2016
Grant date	—

Abstract

An upper shield and a lower shield may be coupled to a rotor for polishing airfoils of the rotor in a vibratory bowl. The upper shield and the lower shield may include spars. The spars may correspond to leading edges and trailing edges of the airfoils. A media including abrasive particles may be flowed through the rotor in the vibratory bowl. The spars may protect the leading edges and trailing edges of the airfoils from excessive material removal by the abrasive particles.

First claim

1 . A shield for use in polishing an airfoil comprising:
a shield disk; and a spar extending radially outward from a circumference of the shield disk.

2 . The shield of claim 1 , wherein a shape of the spar corresponds to a shape of a leading edge of the airfoil.

3 . The shield of claim 1 , wherein the shield is coupled to a vibratory bowl.

4 . The shield of claim 1 , wherein a cross-section of the spar comprises a crescent shape.

5 . The shield of claim 1 , wherein at least one of the shield disk and the spar comprise nylon.

6 . The shield of claim 1 , wherein the spar is detachably coupled to the shield disk.

7 . The shield of claim 1 , further comprising a platform coupled to the shield disk.

8 . The shield of claim 1 , wherein the spar is configured to direct abrasive particles away from an edge of the airfoil.

9 . A system comprising:
a first shield comprising a first spar; a second shield comprising a second spar, wherein the second shield is coupled to the first shield; and a rotor comprising a blade, wherein the rotor is located between the first shield and the second shield.

10 . The system of claim 9 , further comprising a vibratory bowl coupled to the second shield.

11 . The system of claim 9 , wherein the first spar and the second spar are configured to direct abrasive particles away from edges of the blade.

12 . The system of claim 9 , wherein a shape of the first spar corresponds to a trailing edge of the blade, and wherein a shape of the second spar corresponds to a leading edge of the blade.

13 . The system of claim 9 , wherein a distance between the first spar and the blade is constant along a length of the first spar.

14 . The system of claim 9 , wherein the first spar is detachably coupled to a shield disk of the first shield.

15 . The system of claim 9 , wherein the rotor comprises an integrally bladed rotor for a gas turbine engine.

16 . A method of polishing a component having an airfoil comprising:
coupling a first shield to the component, wherein the first shield comprises a first spar; coupling a second shield to the component, wherein the second shield comprises a second spar; and flowing an abrasive media through the component.

17 . The method of claim 16 , further comprising coupling the second shield to a vibratory bowl.

18 . The method of claim 16 , further comprising directing the abrasive media away from an edge of the airfoil using at least one of the first spar and the second spar.

19 . The method of claim 16 , wherein the coupling the first shield to the component comprises positioning the first spar such that a distance between the first spar and the airfoil is constant along a radial length of the first spar.

20 . The method of claim 16 , further comprising detaching the first spar from the first shield and coupling a new spar to the first shield.

Assignees

• United Technologies Corp

Inventors

• Beckman Micah
• Masiukiewicz David

Classifications

• B24C1/083 Primary

  Deburring · CPC title

• F05D2230/90

  Coating; Surface treatment · CPC title

• B24B31/064

  the workpieces being fitted on a support · CPC title

• B24B31/12

  Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group B24B31/00 {(in general B24B55/00)} · CPC title

• F01D5/286

  Particular treatment of blades, e.g. to increase durability or resistance against corrosion or erosion (F01D5/288 takes precedence) · CPC title