Rotor heat shield

Patent metadata

Field	Value
Publication number	US-9920627-B2
Application number	US-201514712988-A
Country	US
Kind code	B2
Filing date	May 15, 2015
Priority date	May 22, 2014
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

Abstract

An assembly for a gas turbine that engine includes a fan section. A turbine section is configured to drive the fan section. The turbine section includes a rotor hub with a rotor lug. A heat shield engages the rotor lug. The heat shield and the rotor lug define a cooling passage.

First claim

What is claimed is:

1. An assembly for a gas turbine engine, the assembly comprising:
a fan section;
a turbine section configured to drive the fan section, the turbine section including a rotor hub with a rotor lug; and
a heat shield engaging the rotor lug, wherein the heat shield includes a planar portion with a first longitudinal hook on a first side of the planar portion and a second longitudinal hook on an opposite second side of the planar portion, a radially inner side of the planar portion directly contacts the rotor lug, and the heat shield and the rotor lug define a cooling passage there between;
wherein the rotor lug includes a first rail extending radially upward and outward from a distal end of the rotor lug for engaging the first longitudinal hook and a second rail extending radially upward and outward from distal end of the rotor lug for engaging the second longitudinal hook.

2. The assembly of claim 1 , further comprising at least one turbulent structure located on the rotor lug and configured to increase turbulence of a cooling fluid flowing through the cooling passage.

3. The assembly of claim 2 , wherein the at least one turbulent structure is integrally formed with the rotor lug.

4. The assembly of claim 1 , further comprising a compressor section with a bleed air source for providing a cooling fluid to the cooling passage.

5. The assembly of claim 1 , wherein the first longitudinal hook and the second longitudinal hook have a fillet radius between approximately 0.030 inches (0.762 mm) and 0.090 inches (2.286 mm).

6. The assembly of claim 1 , wherein the first longitudinal hook and the second longitudinal hook have a non-circular fillet.

7. The assembly of claim 1 , wherein the planar portion defines a radially outer side of the cooling passage and the rotor lug defines a radially inner side of the cooling passage.

8. The assembly of claim 1 , wherein the first longitudinal hook defines a first fillet extending between a radially inner edge of the first longitudinal hook and a radially outer edge of the first longitudinal hook and the second longitudinal hook defines a second fillet extending between a radially inner edge of the second longitudinal hook and a radially outer edge of the second longitudinal hook.

9. A rotor for a gas turbine engine, comprising:
a rotor hub including at least one rotor lug; and
a heat shield engaging the at least one rotor lug, wherein the heat shield includes a planar portion with a first longitudinal hook on a first side of the planar portion and a second longitudinal hook on an opposite second side of the planar portion, a radially inner side of the planar portion directly contacts the rotor lug, and the heat shield and the rotor lug define a cooling passage there between;
wherein the at least one rotor lug includes a first rail extending radially upward and outward from a distal end of the rotor lug for engaging the first longitudinal hook and a second rail extending radially upward and outward from distal end of the rotor lug for engaging the second longitudinal hook.

10. The rotor of claim 9 , further comprising at least one turbulent structure coupled to the lug and configured to increase turbulence of a cooling fluid flowing through the cooling passage.

11. The rotor of claim 10 , wherein the at least one turbulent structure is located on at least one of the rotor hub or the heat shield.

12. The rotor of claim 9 , wherein the first hook and the second hook have a fillet radius between approximately 0.030 inches (0.762 mm) and 0.090 inches (2.286 mm).

13. The rotor of claim 9 , wherein the planar portion defines a radially outer side of the cooling passage and the at least one rotor lug defines a radially inner side of the cooling passage.

14. The rotor of claim 9 , wherein the first longitudinal hook defines a first fillet extending between a radially inner edge of the first longitudinal hook and a radially outer edge of the first longitudinal hook and the second longitudinal hook defines a second fillet extending between a radially inner edge of the second longitudinal hook and a radially outer edge of the second longitudinal hook.

15. A method of cooling a rotor hub, comprising:
a) shielding heat from a rotor hub with at least one rotor lug with a heat shield, wherein the heat shield includes a planar portion with a first longitudinal hook on a first side of the planar portion and a second longitudinal hook on an opposite second side of the planar portion, a radially inner side of the planar portion directly contacts the at least one rotor lug and the at least one rotor lug includes a first rail extending radially upward and outward from a distal end of the rotor lug for engaging the first longitudinal hook and a second rail extending radially upward and outward from distal end of the rotor lug for engaging the second longitudinal hook; and
b) directing a cooling fluid into a cooling passage defined between the rotor hub and the heat shield.

16. The method of claim 15 , wherein the cooling passage includes at least one turbulent structure configured to increase the turbulence of the cooling fluid.

17. The method of claim 15 , further including reflecting heat from the rotor hub with the heat shield.

18. The method of claim 15 , wherein the planar portion defines a radially outer side of the cooling passage and the rotor hub defines a radially inner side of the cooling passage.

19. The method of claim 15 , wherein the first longitudinal hook defines a first fillet extending between a radially inner edge of the first longitudinal hook and a radially outer edge of the first longitudinal hook and the second longitudinal hook defines a second fillet extending between a radially inner edge of the second longitudinal hook and a radially outer edge of the second longitudinal hook.

Assignees

• United Technologies Corp

Inventors

• Snyder Daniel A
• Corcoran Christopher

Classifications

• Y02T50/676

  Cross-Sectional Technologies · mapped topic

• F04D25/045

  the pump wheel carrying the fluid driving means, e.g. turbine blades · CPC title

• F01D5/082 Primary

  on the side of the rotor disc · CPC title

• F01D11/008

  by spacer elements between the blades, e.g. independent interblade platforms · CPC title

• F04D29/325

  for axial flow fans (blade mountings F04D29/34, blades F04D29/38) · CPC title