Seal assembly for a rotary engine housing

Patent metadata

Field	Value
Publication number	US-12110796-B1
Application number	US-202318221645-A
Country	US
Kind code	B1
Filing date	Jul 13, 2023
Priority date	Jul 13, 2023
Publication date	Oct 8, 2024
Grant date	Oct 8, 2024

Abstract

An engine housing includes a rotor housing and a side housing assembly. The rotor housing includes 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. The side housing assembly includes 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. The seal assembly includes a support ring and a sealing ring. The support ring is disposed at the perimeter edge and the first axial end. The support ring circumscribes the side plate. The sealing ring extends between and to a first axial sealing ring end and a second axial sealing ring end. The first axial sealing ring 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 sealing ring, the support ring and the sealing ring extend about the axis, the support ring is disposed at the perimeter edge and the first axial end, the support ring circumscribes the side plate, the sealing ring extends between and to a first axial sealing ring end and a second axial sealing ring end, the first axial sealing ring end is disposed at the support ring and the outer side, and the second axial sealing ring 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 sealing ring, and the side plate further form the coolant passage.

4. The engine housing of claim 1 , wherein the seal assembly further includes a first seal, and the first 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 sealing ring; 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 first seal is disposed in the dovetail seal groove.

7. The engine housing of claim 1 , wherein the seal assembly further includes a second seal, and the second seal contacts the sealing ring and the support ring.

8. The engine housing of claim 1 , wherein the seal assembly further includes a third seal, and the third seal contacts the sealing ring and the outer side.

9. The engine housing of claim 1 , wherein the inner side is axially spaced from the first axial end 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 sealing ring includes a sealing ring material, and the sealing ring 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 sealing ring 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 sealing ring, the support ring and the sealing ring extend about the axis, the support ring is disposed radially between the side plate and the side housing body, the support ring is further disposed between the rotor cavity and the coolant passage, the sealing ring is disposed axially between the support ring and the side housing body, and the sealing ring 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 sealing ring 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,
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 sealing ring, the support ring and the sealing ring 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 disposed at the side plate, and
the sealing ring extends between and to a first axial sealing ring end and a second axial sealing ring end, the sealing ring further extends between and to a first radial sealing ring end and a second radial sealing ring end, the first axial sealing ring end is disposed at the second axial support ring end and the side plate, the second axial sealing ring end is disposed at the side housing body, and the first radial sealing ring 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 first seal groove at the recess, the seal assembly

Assignees

• Pratt & Whitney Canada

Inventors

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

Classifications

• F01C21/104

  Stators; Members defining the outer boundaries of the working chamber · CPC title

• F01C21/06

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

• F01C19/005 Primary

  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

• F01C1/22 Primary

  of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth- equivalents than the outer member · CPC title

• F01C1/3442

  the surfaces of the inner and outer member, forming the working space, being surfaces of revolution · CPC title