Seal assembly for a rotary engine housing

Patent metadata

Field	Value
Publication number	US-12252991-B2
Application number	US-202318221651-A
Country	US
Kind code	B2
Filing date	Jul 13, 2023
Priority date	Jul 13, 2023
Publication date	Mar 18, 2025
Grant date	Mar 18, 2025

Abstract

An engine housing includes a rotor housing body, a side housing body a side plate and a seal assembly. The rotor housing body extends about an axis to form a rotor cavity. The rotor housing body extends between and to a first axial end and a second axial end. The side housing body is disposed at the first axial end. The side plate includes an inner side, an outer side, and a perimeter edge extending from the inner side to the outer side. The seal assembly includes a support ring and a spacer. The support ring and the spacer extend about the axis. The support ring is mounted to the perimeter edge by a braze joint. The spacer extends between and to a first axial spacer end and a second axial spacer end. The first axial spacer end is disposed at the support ring and the outer side.

First claim

The invention claimed is:

1. An engine housing for an aircraft rotary engine, the engine housing comprising:
a rotor housing including a rotor housing body, the rotor housing body extends about an axis to form a rotor cavity of the engine housing, and the rotor housing body extends between and to a first axial end and a second axial end; and
a side housing assembly including a side housing body, a side plate, and a seal assembly,
the side housing body is disposed at the first axial end,
the side plate is disposed axially between the rotor housing body and the side housing body, the side plate includes an inner side, an outer side, and a perimeter edge extending from the inner side to the outer side, and the inner side further forms the rotor cavity, and
the seal assembly includes a support ring and a spacer, the support ring and the spacer extend about the axis, the support ring is mounted to the perimeter edge of the side plate by a braze joint between the support ring and the side plate, the support ring circumscribes the side plate, the spacer extends between and to a first axial spacer end and a second axial spacer end, the first axial spacer end is disposed at the support ring and the outer side of the side plate, the second axial spacer end is disposed at the side housing body.

2. The engine housing of claim 1 , wherein the rotor housing body and the side housing body form a coolant passage, and the support ring is disposed between the rotor cavity and the coolant passage.

3. The engine housing of claim 2 , wherein the support ring, the spacer, and the side plate further form the coolant passage.

4. The engine housing of claim 1 , wherein the seal assembly further includes a seal, and the seal contacts the rotor housing body and the support ring.

5. The engine housing of claim 4 , wherein:
the support ring extends between and to a first axial support ring end and a second axial support ring end, the first axial support ring end is disposed at the rotor housing body, and the second axial support ring end is disposed at the spacer; and
the rotor housing body forms a recess at the first axial end, and the first axial support ring end is disposed within the recess.

6. The engine housing of claim 4 , wherein the rotor housing body forms a dovetail seal groove and the seal is disposed in the dovetail seal groove.

7. The engine housing of claim 1 , wherein the support ring is formed by a single ring body extending completely around the axis.

8. The engine housing of claim 1 , wherein the support ring includes a plurality of discrete ring body segments assembled to form the support ring.

9. The engine housing of claim 1 , wherein the inner side of the side plate is axially spaced from the first axial end of the side housing body by a gap.

10. The engine housing of claim 1 , wherein the support ring extends between and to a first radial end and a second radial end, the first radial end contacts the side housing body, and the second radial end contacts the perimeter edge.

11. The engine housing of claim 1 , wherein the side housing body includes a side housing body material, the side plate includes a side plate material, and the side housing body material is different than the side plate material.

12. The engine housing of claim 11 , wherein the spacer includes a spacer material, and the spacer material is different than the side housing body material and the side plate material.

13. The engine housing of claim 1 , wherein the second axial spacer end includes an outer radial end portion and an inner radial end portion, the outer radial end portion contacts the side housing body, and the inner radial end portion is spaced from the side housing body.

14. An engine housing for an aircraft rotary engine, the engine housing comprising:
a rotor housing including a rotor housing body, the rotor housing body extends about an axis to form a rotor cavity of the engine housing, the rotor housing body extends between and to a first axial end and a second axial end, and the rotor housing body forms a coolant passage; and
a side housing assembly including a side housing body, a side plate, and a seal assembly,
the side housing body is disposed at the first axial end, and the side housing body further forms the coolant passage,
the side plate is disposed axially between the rotor housing body and the side housing body, and the side plate further forms the rotor cavity, and
the seal assembly includes a support ring and a spacer, the support ring and the spacer extend about the axis, the support ring is mounted to the side plate by a braze joint, the braze joint extends circumferentially about the axis, the support ring is disposed between the rotor cavity and the coolant passage, the spacer is disposed axially between the support ring and the side housing body, and the spacer is further disposed axially between the side plate and the side housing body.

15. The engine housing of claim 14 , wherein the coolant passage includes a coolant channel and a plurality of coolant conduits, the side housing body and the side plate form the coolant channel, the coolant channel extends about the axis, the side housing body and the rotor housing body form the plurality of coolant conduits, and the plurality of coolant conduits are connected in fluid communication with the coolant channel.

16. The engine housing of claim 15 , wherein the spacer further forms the coolant channel.

17. The engine housing of claim 15 , wherein the support ring further forms the plurality of coolant conduits.

18. An engine housing for an aircraft rotary engine, the engine housing comprising:
a rotor housing including a rotor housing body, the rotor housing body extends about an axis to form a rotor cavity of the engine housing, and the rotor housing body extends between and to a first axial end and a second axial end; and
a side housing assembly including a side housing body, a side plate, and a seal assembly,
the side housing body is disposed at the first axial end of the rotor housing body,
the side plate is disposed axially between the rotor housing body and the side housing body, and the side plate further forms the rotor cavity, and
the seal assembly includes a support ring and a spacer, the support ring and the spacer extend about the axis,
the support ring extends between and to a first axial support ring end and a second axial support ring end, the support ring further extends between and to a first radial support ring end and a second radial support ring end, the first axial support ring end is disposed at the first axial end, the first radial support ring end is disposed at the side housing body, and the second radial support ring end is mounted to the side plate by a braze joint, and
the spacer extends between and to a first axial spacer end and a second axial spacer end, the spacer further extends between and to a first radial spacer end and a second radial spacer end, the first axial spacer end is disposed at the second axial support ring end and the side plate, the second axial spacer end is disposed at the side housing body, and the first radial spacer end is disposed at the side housing body.

19. The engine housing of claim 18 , wherein the rotor housing body forms a recess at the first axial end, and the first axial support ring end is disposed within the recess.

20. The engine housing of claim 19 , wherein the rotor housing body forms a seal groove at the recess, the seal assembly further includes a seal disposed in the seal groove, and th

Assignees

• Pratt & Whitney Canada

Inventors

• Vinski Johnny
• Bousquet Michel
• Simoneau Jean-Philippe
• Gagnon-Martin David
• Savaria Vincent
• Villeneuve Bruno
• Berube Stephane
• Roy Frederic
• Bolduc Sebastien

Classifications

• F04C27/008

  for other than working fluid, i.e. the sealing arrangements are not between working chambers of the machine · CPC title

• F02B55/10

  Cooling thereof · CPC title

• F01C21/108

  with an axial surface, e.g. side plates · CPC title

• F01C21/06

  Heating; Cooling (of machines or engines in general F01P); Heat insulation (heat insulation in general F16L) · CPC title

• F01C19/005

  Structure and composition of sealing elements such as sealing strips, sealing rings and the like; Coating of these elements (vane construction F01C21/0809; piston rings and ring sealings of similar construction in general F16J9/00) · CPC title