Casting core for a cast engine component

Patent metadata

Field	Value
Publication number	US-2024066588-A1
Application number	US-202217898751-A
Country	US
Kind code	A1
Filing date	Aug 30, 2022
Priority date	Aug 30, 2022
Publication date	Feb 29, 2024
Grant date	—

Abstract

A casting core used in the manufacture of a cast engine component for a turbine engine, the cast engine component having a first area, a second area, a fluid passage wall separating the first area and the second area, and a connecting fluid passage extending through the fluid passage wall and interconnecting the first area and the second area. The connecting fluid passage having a turn with a radius (R). The casting core having a first core and a second core. The first core and the second core being defined by a set of geometric characteristics having a first minimum equivalent diameter (D1eqmin) of the first core and a second minimum equivalent diameter (D2eqmin) of the second core. A first flexible geometry factor (FGF1) being equal to:(D⁢1eq⁢minD⁢2eq⁢min)⁢(RD⁢2eq⁢min).

First claim

What is claimed is:

1 . A casting core used in the manufacture of a cast engine component for a turbine engine, the cast engine component having a first area, a second area, a fluid passage wall separating the first area and the second area, and a connecting fluid passage extending through the fluid passage wall and interconnecting the first area and the second area, the casting core comprising:
a first core corresponding to at least one of the first area or the second area of the cast engine component; and a second core corresponding to the connecting fluid passage of the cast engine component, the second core further defining:
a first leg of the connecting fluid passage extending in a first direction;
a second leg of the connecting fluid passage extending in a second direction non-parallel to the first direction, the second leg intersecting the first leg at an angle (α); and
a turn of the connecting fluid passage formed along an intersection between the first leg and the second leg and extending along at least a portion of the first leg or the second leg, the turn having a first bend with a first radius of curvature and a second bend with a second radius of curvature, with the smallest of the first and second radius of curvature defining a radius (R) of the turn;
wherein after a casting process, the first core and the second core are each removed to define voids formed within the cast engine component; wherein at least a portion of the first core and an entirety of the second core is provided within a geometric boundary defined by a set of geometric characteristics of the first core and the second core within the geometric boundary, the set of geometric characteristics having: a first minimum equivalent diameter (D 1 eqmin ) of the first core that is representative of a minimum hydraulic diameter of at least one of the first area or the second area within the geometric boundary; and a second minimum equivalent diameter (D 2 eqmin ) of the second core that is representative of a minimum hydraulic diameter of the connecting fluid passage within the geometric boundary; wherein a first flexible geometry factor (FGF 1 ) is equal to: and

(

D
⁢

1
eqmin

D
⁢

2
eqmin

)

⁢

(

R

D
⁢

2
eqmin

)

;

wherein the first flexible geometry factor (FGF 1 ) is greater than or equal to 0.02 and less than or equal to 1000 (0.02≤FGF 1 ≤1000).

2 . The casting core of claim 1 , wherein a second flexible geometry factor (FGF 2 ) is equal to:

(

D
⁢

1
eqmin

D
⁢

2
eqmin

)

⁢

(

R

D
⁢

2
eqmin

)

⁢

(

α

45
⁢
°

)

,

and wherein the second flexible geometry factor (FGF 2 ) is greater than or equal to 0.02 and less than or equal to 400 (0.02≤FGF 2 ≤400).

3 . The casting core of claim 2 , wherein the geometric boundary includes only the second core and a portion of the first core defining the second area, and wherein the second flexible geometry factor (FGF 2 ) is greater than or equal to 0.08 and less than or equal to 400 (0.08≤FGF 2 ≤400).

4 . The casting core of claim 2 , wherein the geometric boundary includes only the second core and a portion of the first core defining the first area, and wherein the second flexible geometry factor (FGF 2 ) is greater than or equal to 0.19 and less than or equal to 4000 (0.19≤FGF 2 ≤4000).

5 . The casting core of claim 2 , wherein the geometric boundary includes a portion the first core defining both the first area and the second area, the first minimum equivalent diameter (D 1 eqmin ) is an average of a minimum equivalent diameter of the first area and a minimum equivalent diameter of the second area, and wherein the second flexible geometry factor (FGF 2 ) is greater than or equal to 0.02 and less than or equal to 2000 (0.02≤FGF 2 ≤2000).

6 . The casting core of claim 1 , wherein the geometric boundary includes only the second core and a portion of the first core defining the second area, and wherein the first flexible geometry factor (FGF 1 ) is greater than or equal to 0.08 and less than or equal to 100 (0.08≤FGF 1 ≤100).

7 . The casting core of claim 1 , wherein the geometric boundary includes only the second core and a portion of the first core defining the first area, and wherein the first flexible geometry factor (FGF 1 ) is greater than or equal to 0.19 and less than or equal to 1000 (0.19≤FGF 1 ≤1000).

8 . The casting core of claim 1 , wherein the geometric boundary includes a portion the first core defining both the first area and the second area, the first minimum equivalent diameter (D 1 eqmin ) is an average of a minimum equivalent diameter of the first area and a minimum equivalent diameter of the second area, and wherein the first flexible geometry factor (FGF 1 ) is greater than or equal to 0.02 and less than or equal to 500 (0.02≤FGF 1 ≤500).

9 . The casting core of claim 1 , wherein a third flexible geometry factor (FGF 3 ) is equal to:

FGF
⁢
3

=

(

D
⁢

1
eq

D
⁢

2
eq

Assignees

• Gen Electric

Inventors

• Osgood Daniel Endecott
• Webster Zachary Daniel
• Gonyou Craig Alan
• Durstock Daniel Lee
• Feldmann Kevin R
• Gallier Kirk Douglas
• Herman William C
• Gentilli Nicholas Charles

Classifications

• B22C9/10 Primary

  Cores; Manufacture or installation of cores {(breaker cores B22C9/084)} · CPC title

• B22C9/103 Primary

  Multipart cores · CPC title

• F01D5/187

  Convection cooling · CPC title

• F05D2250/185

  serpentine-like · CPC title

• F05D2260/202

  by film cooling · CPC title