Debris strainer for gas turbine engine cooling flow

Patent metadata

Field	Value
Publication number	US-2018361284-A1
Application number	US-201715627809-A
Country	US
Kind code	A1
Filing date	Jun 20, 2017
Priority date	Jun 20, 2017
Publication date	Dec 20, 2018
Grant date	—

Abstract

A gas turbine engine includes an engine static structure that provides a flow path. A metering hole is provided in the engine static structure. A strainer is arranged over the metering hole. The strainer includes multiple holes that have a total area that is greater than a metering hole area.

First claim

What is claimed is:

1 . A gas turbine engine comprising:
engine static structure providing a flow path; a metering hole provided in the engine static structure; and a strainer arranged over the metering hole, the strainer including multiple holes having a total area that is greater than a metering hole area.

2 . The gas turbine engine of claim 1 , comprising a turbine section that provides a secondary flow path corresponding the flow path, the secondary flow path is provided between a case structure and a vane and a blade outer air seal.

3 . The gas turbine engine of claim 2 , wherein one of the vane, the case structure and the blade outer air seal provide the metering hole.

4 . The gas turbine engine of claim 3 , wherein the case structure includes a vane support to which the vane is mounted, the vane support provides the metering hole.

5 . The gas turbine engine of claim 4 , wherein the vane includes an aft rail, and a seal is provided between the vane support and the aft rail to provide a first cavity, wherein the strainer is provided within the first cavity.

6 . The gas turbine engine of claim 5 , wherein the vane support includes a radially extending planar annular wall, and the metering hole is provided in the wall.

7 . The gas turbine engine of claim 6 , wherein a second seal is provided between the aft rail and a blade outer air seal support to which the blade outer air seal is mounted, a second cavity is provided between the case structure and the first and second seals, the strainer is fluidly arranged between the first and second cavities.

8 . The gas turbine engine of claim 6 , wherein the strainer is secured to the wall.

9 . The gas turbine engine of claim 1 , wherein the strainer includes a flange having an opening, and a cup extends from the flange and provides a pocket, the holes are provided in the cup.

10 . The gas turbine engine of claim 9 , wherein the flange is planar and secured to the engine static structure by brazing or welding.

11 . The gas turbine engine of claim 9 , wherein the total area of the holes is greater than the opening.

12 . The gas turbine engine of claim 9 , wherein the cup is cylindrical and the holes are provided about a periphery of the cup.

13 . A method cooling a gas turbine engine, comprising:
flowing fluid through a strainer having inlet holes with a larger total area than a metering hole over which the strainer is secured.

14 . The method of claim 13 , wherein the flowing step includes providing a secondary flow to a high pressure turbine between a case structure and a vane and a blade outer air seal.

15 . The method of claim 14 , wherein the strainer extends in an axial direction along which the second flow travels.

16 . The method of claim 15 , wherein the flange has an opening, and a cup extends from the flange and provides a pocket, the holes are provided in a periphery of the cup and the total area is greater than and opening area, wherein the flange is planar and annular in shape, and an end of the cup is closed.

17 . A flow strainer for a gas turbine engine comprising:
a flange having an opening, and a cup extends from the flange and provides a pocket, multiple holes are provided in the cup and have a total area that is greater than and opening area.

18 . The strainer of claim 17 , wherein the flange is planar and annular in shape.

19 . The strainer of claim 17 , wherein the cup is cylindrical and the holes are provided about a periphery of the cup.

20 . The strainer of claim 19 , wherein an end of the cup is closed.

Assignees

• United Technologies Corp

Inventors

• Jennings Timothy J
• Whitfield Christopher
• Griffin David Richard
• Cosher Christopher

Classifications

• B01D46/2403 Primary

  characterised by the physical shape or structure of the filtering element · CPC title

• B01D35/02

  Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks, (B01D35/05 takes precedence; {water pipe system filters E03B3/18, E03B7/07; dirt catchers in sewers E03F; filters or strainers for pipe-lines in general B08B, E03F; object or dirt catching devices in sinks or the like E03C1/26; suction strainers or filters for pumps F04B53/005, F04D29/70}) · CPC title

• F02C7/055

  with intake grids, screens or guards · CPC title

• F05D2260/607

  Preventing clogging or obstruction of flow paths by dirt, dust, or foreign particles · CPC title

• F01D25/32

  Collecting of condensation water; Drainage {; Removing solid particles} · CPC title