Flow vortex spoiler

Patent metadata

Field	Value
Publication number	US-2016201848-A1
Application number	US-201414912319-A
Country	US
Kind code	A1
Filing date	Aug 5, 2014
Priority date	Aug 16, 2013
Publication date	Jul 14, 2016
Grant date	—

Abstract

A flow vortex spoiler including an oil sump wherein pressurization air flow moves about the oil sump through a sump pressurization cavity, the cavity having an inlet, a circumferential plate disposed across a portion of the pressurization cavity near the inlet. The circumferential plate is disposed at said inlet to said sump pressurization cavity. The circumferential plate has a plurality of closely spaced apertures. The pressurization air has a radial component and a tangential component wherein the circumferential plate and the plurality of closely spaced apertures substantially reduce the tangential component of the pressurization air and further wherein the vortex spoiler inhibits excessive pressure change within the pressurization cavity and inhibits oil leakage at seals adjacent to the oil sump.

First claim

1 . A flow vortex spoiler for equalizing pressure between
a first location and a second location, comprising: an oil sump wherein pressurization air flow moves about said oil sump through at least one sump pressurization cavity, said cavity having an inlet; a circumferential plate disposed at said inlet to said sump pressurization cavity; said circumferential plate having a plurality of spaced apart apertures; said pressurization air flow having a radial component and a tangential component; said circumferential plate and said plurality of spaced apart apertures impinging said pressurization air and substantially reducing said tangential component of said pressurization air flow, wherein said vortex spoiler inhibits excessive pressure change within said pressurization cavity and inhibits oil leakage at forward and aft sump seals adjacent to said oil sump at said first location and said second location.

2 . The flow vortex spoiler of claim 1 , wherein said circumferential plate is fixed.

3 . The flow vortex spoiler of claim 1 , wherein said plurality of apertures each having a length to diameter ratio so as to substantially reduce said tangential component of pressurization air flow.

4 . The flow vortex spoiler of claim 3 wherein said length to diameter ratio is based on said tangential component and said radial component of said pressurization air.

5 . The flow vortex spoiler of claim 3 , wherein said pressurization air flow impinges a sidewall of said apertures to reduce said tangential component and reduce vortexing of pressurization air.

6 . The flow vortex spoiler of claim 1 , wherein leakage of oil is reduced at said aft sump seal.

7 . The flow vortex spoiler of claim 6 , wherein pressure reversal at said aft sump seal is reduced due to reduction of said tangential component of said pressurization air.

8 . The flow vortex spoiler of claim 1 , wherein the tangential component of the pressurization air flow causes swirl of the pressurization air.

9 . The flow vortex spoiler of claim 1 , wherein the apertures each have a major axis.

10 . The flow vortex spoiler of claim 10 , wherein the major axis is purely radial.

11 . The flow vortex spoiler of claim 10 , wherein the major axis is at a non-perpendicular angle to an engine axis.

12 . The flow vortex spoiler of claim 1 , wherein said apertures define a plurality of rows and columns.

13 . The flow vortex spoiler of claim 12 , wherein apertures of a first column of the columns are offset in a circumferential direction from apertures of a second axially adjacent column.

14 . The flow vortex spoiler of Claim 13 , wherein centers of said apertures in said first column are located between 0 and 90 degrees from apertures in said second column.

15 . The flow vortex spoiler of claim 1 , wherein said apertures have random spacing.

16 . The flow vortex spoiler of claim 1 , wherein said apertures have varying shapes.

17 . The flow vortex spoiler of claim 1 , wherein said apertures have constant shape.

18 . The flow vortex spoiler of claim 1 , wherein the circumferential plate further has at least one anti-rotation feature.

19 . The flow vortex spoiler of claim 18 , wherein the anti-rotation feature comprises a tab along an edge of said plate.

Assignees

• Gen Electric

Inventors

• Bordne Christopher Mark
• Luz James
• Mccarthy Thomas Charles
• Fenn Andrew Courtenay

Classifications

• F05D2220/32

  in gas turbines · CPC title

• F16N1/00 Primary

  Constructional modifications of parts of machines or apparatus for the purpose of lubrication · CPC title

• F01D25/18

  Lubricating arrangements (of machines or engines in general F01M) · CPC title

• F05D2260/98

  Lubrication · CPC title

• F02C7/06

  Arrangements of bearings (bearings F16C); Lubricating ({of turbo machines F01D25/18; of machines or} engines in general F01M) · CPC title