Two-piece seat for contacting seal

Patent metadata

Field	Value
Publication number	US-11199263-B2
Application number	US-201916361689-A
Country	US
Kind code	B2
Filing date	Mar 22, 2019
Priority date	Mar 22, 2019
Publication date	Dec 14, 2021
Grant date	Dec 14, 2021

Abstract

A contacting seal for a gas turbine engine include a seal element rotationally fixed relative to an axis of rotation, and a seal seat configured to rotate circumferentially about an axis of rotation and contact the seal element at an interface surface of the seal seat. The seal seat includes an interface component including a seat wall including the interface surface and a seat cavity surface opposite the interface surface, such that a wall thickness of the interface component is defined therebetween. A cover component is secured to the interface component, the cover component including a cover cavity surface. The seat cavity surface and the cover cavity surface define a cooling cavity therebetween configured such that a flow of fluid therethrough cools the interface component via contact between the coolant and the seat cavity surface.

First claim

What is claimed is:

1. A contacting seal for a gas turbine engine, comprising:
a seal element rotationally fixed relative to an axis of rotation;
a seal seat configured to rotate circumferentially about an axis of rotation and contact the seal element at an interface surface of the seal seat, the seal seat including:
an interface component including:
a seat wall including the interface surface;
a seat cavity surface opposite the interface surface, such that a wall thickness of the interface component is defined therebetween;
a cover component secured to the interface component, the cover component including a cover cavity surface, the seat cavity surface and the cover cavity surface defining a cooling cavity therebetween configured such that a flow of fluid therethrough cools the interface component via contact between the flow of fluid and the seat cavity surface;
a plurality of oil feed ports at least partially defined by the cover component and fluidly connected to the cooling cavity to direct the flow of fluid toward the cooling cavity; and
a plurality of oil outlet ports at least partially defined in the cover component and fluidly connected to the cooling cavity to direct the flow of fluid from the cooling cavity.

2. The contacting seal of claim 1 , wherein the interface component is secured to the cover component via a press fit.

3. The contacting seal of claim 1 , wherein the plurality of oil feed ports are radially inboard of the interface surface relative to the axis of rotation.

4. The contacting seal of claim 1 , further comprising one or more flow trips disposed extending into the cooling cavity between the plurality of oil feed ports and the interface surface to direct the flow of fluid toward the seat cavity surface.

5. The contacting seal of claim 1 , further comprising one or more dams extending into the cooling cavity between the interface surface and the plurality of oil outlet ports to slow the exit of the flow of fluid from the cooling cavity.

6. The contacting seal of claim 1 , wherein the oil outlet ports are located radially outboard of the interface surface.

7. The contacting seal of claim 1 , wherein the oil feed ports are configured to direct the flow of fluid into the cooling cavity in one of an axial direction toward the interface surface or a radially outwardly direction relative to the axis of rotation.

8. The contacting seal of claim 1 , wherein the cooling cavity is circumferentially continuous about the axis of rotation.

9. The contacting seal of claim 1 , wherein the interface component is formed from a first material and the cover component is formed from a second material different from the first material.

10. A gas turbine engine, comprising:
a rotating shaft;
one or more bearing arrangements supportive of the rotating shaft; and
a contacting seal configured to seal a bearing arrangement of the one or more bearing arrangements, the contacting seal including:
a seal element rotationally fixed relative to an axis of rotation;
a seal seat configured to rotate circumferentially about an axis of rotation and contact the seal element at an interface surface of the seal seat, the seal seat including:
an interface component including:
a seat wall including the interface surface;
a seat cavity surface opposite the interface surface, such that a wall thickness of the interface component is defined therebetween;
a cover component secured to the interface component, the cover component including a cover cavity surface, the seat cavity surface and the cover cavity surface defining a cooling cavity therebetween configured such that a flow of fluid therethrough cools the interface component via contact between the flow of fluid and the seat cavity surface;
a plurality of oil feed ports at least partially defined by the cover component and fluidly connected to the cooling cavity to direct the flow of fluid toward the cooling cavity; and
a plurality of oil outlet ports at least partially defined in the cover component and fluidly connected to the cooling cavity to direct the flow of fluid from the cooling cavity.

11. The gas turbine engine of claim 10 , wherein the interface component is secured to the cover component via a press fit.

12. The gas turbine engine of claim 10 , wherein the plurality of oil feed ports are radially inboard of the interface surface relative to the axis of rotation.

13. The gas turbine engine of claim 10 , further comprising one or more flow trips disposed extending into the cooling cavity between the plurality of oil feed ports and the interface surface to direct the flow of fluid toward the seat cavity surface.

14. The gas turbine engine of claim 10 , further comprising one or more dams extending into the cooling cavity between the interface surface and the plurality of oil outlet ports to slow the exit of the flow of fluid from the cooling cavity.

15. The gas turbine engine of claim 10 , wherein the oil outlet ports are located radially outboard of the interface surface.

16. The gas turbine engine of claim 10 , wherein the oil feed ports are configured to direct the flow of fluid into the cooling cavity in one of an axial direction toward the interface surface or a radially outwardly direction relative to the axis of rotation.

17. The gas turbine engine of claim 10 , wherein the cooling cavity is circumferentially continuous about the axis of rotation.

18. The gas turbine engine of claim 10 , wherein the interface component is formed from a first material and the cover component is formed from a second material different from the first material.

Assignees

• United Technologies Corp
• Raytheon Tech Corp

Inventors

• Amador Armando
• Boratgis Ernest

Classifications

• F05D2240/55

  Seals · CPC title

• F16J15/3404

  and characterised by parts or details relating to lubrication, cooling or venting of the seal · CPC title

• F01D11/003 Primary

  by packing rings; Mechanical seals · CPC title

• F01D11/005

  Sealing means between non relatively rotating elements · CPC title

• F05D2220/32

  in gas turbines · CPC title