Airfoil with rib having connector arms

Patent metadata

Field	Value
Publication number	US-11480059-B2
Application number	US-201916545417-A
Country	US
Kind code	B2
Filing date	Aug 20, 2019
Priority date	Aug 20, 2019
Publication date	Oct 25, 2022
Grant date	Oct 25, 2022

Abstract

An airfoil includes an airfoil wall that defines a leading end, a trailing end, and first and second sides that join the leading end and the trailing end. A rib connects the first and second sides of the airfoil wall. The rib defines a tube portion that circumscribes a rib passage, and first and second connector arms that solely join the tube portion to, respectively, the first and second sides of the airfoil wall.

First claim

What is claimed is:

1. An airfoil comprising:
an airfoil wall defining a leading end, a trailing end, and first and second sides joining the leading end and the trailing end, the first and second sides spanning in a radial direction; and
in serial order between the leading end and the trailing end, first, second, and third ribs connecting the first and second sides of the airfoil wall, each of the first, second, and third ribs defining
a tube portion circumscribing a rib passage, and
first and second connector arms solely joining the tube portion to, respectively, the first and second sides of the airfoil wall;

the first rib and the airfoil wall bounding a first cooling channel there between that is flow isolated from the rib passage of the first rib;
the first rib, the second rib, and the airfoil wall bounding a second cooling channel there between that is flow isolated from the first cooling channel, the first rib having a first cooling aperture fluidly connecting the rib passage of the first rib and the second cooling channel; and
the second rib, the third rib, and the airfoil wall bounding a third cooling channel there between that is flow isolated from each of the first cooling channel and the second cooling channel, the second rib having a second cooling aperture fluidly connecting the rib passage of the second rib and the third cooling channel.

2. The airfoil as recited in claim 1 , further comprising a fourth rib also connecting the first and second sides of the airfoil wall and also defining a respective tube portion circumscribing a respective rib passage and respective first and second connector arms solely joining the tube portion to, respectively, the first and second sides of the airfoil wall.

3. The airfoil as recited in claim 2 , wherein the third rib, the fourth rib, and the airfoil wall bound a fourth cooling channel there between.

4. The airfoil as recited in claim 3 , wherein the fourth rib includes at least one cooling aperture aft of the respective connector arms of the fourth rib.

5. The airfoil as recited in claim 1 , wherein, except for connection through the first and second wall of the airfoil wall, the first rib, the second rib, and the third rib are disjoined from each other.

6. The airfoil as recited in claim 1 , wherein the airfoil wall includes cooling apertures connecting each of the first cooling channel, the second cooling channel, and the third cooling channel to an exterior gaspath.

7. The airfoil as recited in claim 1 , wherein at least one of the first cooling channel, the second cooling channel, and the third cooling channel is connected to an exterior gaspath through cooling apertures in the first side of the airfoil wall but not the second side of the airfoil wall.

8. The airfoil as recited in claim 1 , wherein the second cooling channel is H-shaped, with side lobe portions of the H-shape extending along, respectively, the first and second sides of the airfoil wall and a middle portion of the H-shape extending between the first and second ribs.

Assignees

• United Technologies Corp
• Raytheon Tech Corp

Inventors

• Spangler Brandon W
• Pack David R

Classifications

• F01D5/141

  Shape, i.e. outer, aerodynamic form (F01D5/148 - F01D5/20 take precedence; blade construction F01D5/147) · CPC title

• F01D5/188 Primary

  with an insert in the blade cavity to guide the cooling fluid, e.g. forming a separation wall · CPC title

• F05D2250/185

  serpentine-like · CPC title

• F05D2240/301

  Cross-sectional characteristics · CPC title

• F01D5/147 Primary

  Construction, i.e. structural features, e.g. of weight-saving hollow blades (F01D5/148, F01D5/16 and F01D5/20 take precedence; blade shape F01D5/141; blades with cooling or heating channels or cavities F01D5/18; heating, heat-insulating or cooling means on blades F01D5/18) · CPC title