Dynamic deaeration system

Patent metadata

Field	Value
Publication number	US-12330089-B2
Application number	US-202217930772-A
Country	US
Kind code	B2
Filing date	Sep 9, 2022
Priority date	Sep 9, 2022
Publication date	Jun 17, 2025
Grant date	Jun 17, 2025

Abstract

A deaeration rotor for an aircraft engine lubrication system comprising: an internal ring about an axis having a radially outer internal ring surface defining an inner boundary of an inner passage of the deaeration rotor; an external ring about the axis having a radially inner external ring surface defining an outer boundary of an outer passage of the deaeration rotor; a disc about the axis radially between the internal ring and the external ring, the disc having a radially inner disc surface defining an outer boundary of the inner passage and a radially outer disc surface defining an inner boundary of the outer passage; and blades circumferentially spaced from one another relative to the axis extending in the outer passage from at least one of the external ring and the disc, the blades located radially inward of an annular portion of the outer passage immediately downstream of the blades.

First claim

The invention claimed is:

1. A deaeration rotor for an aircraft engine lubrication system, the deaeration rotor comprising:
an internal ring extending about an axis, the internal ring having a radially outer internal ring surface defining an inner boundary of an inner passage of the deaeration rotor;
an external ring extending about the axis, the external ring having a radially inner external ring surface defining an outer boundary of an outer passage of the deaeration rotor;
a disc extending about the axis radially between the internal ring and the external ring, the disc having a radially inner disc surface defining an outer boundary of the inner passage and a radially outer disc surface defining an inner boundary of the outer passage; and
a series of blades circumferentially spaced from one another relative to the axis, the series of blades extending in the outer passage from at least one of the external ring and the disc, the series of blades located radially inward of an annular portion of the outer passage immediately downstream of the series of blades.

2. The deaeration rotor of claim 1 , wherein the annular portion of the outer passage extends circumferentially about the axis unobstructed.

3. The deaeration rotor of claim 1 , wherein the radially outer disc surface has an outer disc diameter, and the annular portion of the outer passage extends from upstream of the outer disc diameter to downstream of the outer disc diameter relative to a lubricant flow through the deaeration rotor.

4. The deaeration rotor of claim 3 , wherein the annular portion extends from radially inward of the outer disc diameter upstream thereof to radially inward of the outer disc diameter downstream thereof.

5. The deaeration rotor of claim 1 , wherein the disc has a body defining the radially inner disc surface and the radially outer disc surface, and a lip extending from an upstream side of the body, the lip having an inner lip surface bounding a portion of the inner passage and an outer lip surface surrounding the inner lip surface and bounding a portion of the outer passage.

6. The deaeration rotor of claim 5 , wherein the radially outer disc surface includes the outer lip surface and an outer body surface of the body having an outer disc diameter, the lip located radially inward of the outer disc diameter relative to the axis.

7. The deaeration rotor of claim 5 , wherein the series of blades extends from the outer lip surface in the outer passage.

8. The deaeration rotor of claim 7 , wherein the inner lip surface and the outer lip surface extend from the body to a tip of the lip, the series of blades located closer to the tip than to the body.

9. The deaeration rotor of claim 5 , wherein the lip defines at least one opening extending from the inner lip surface to the outer lip surface in fluid communication between the inner passage and the outer passage.

10. The deaeration rotor of claim 5 , wherein the series of blades is a first series of blades, the deaeration rotor further comprising a second series of blades spaced circumferentially from one another relative to the axis, the second series of blades extending in the inner passage from at least one of the radially outer internal ring surface and the inner lip surface.

11. The deaeration rotor of claim 10 , wherein the first series of blades is radially outward of the second series of blades relative to the axis.

12. The deaeration rotor of claim 10 , wherein an annular portion of the inner passage is located radially outward of the second series of blades.

13. The deaeration rotor of claim 5 , wherein the body is axially spaced from the internal ring, and the lip extends from the body so as to axially overhang a portion of the internal ring.

14. A deaeration system for an engine lubrication system, the deaeration system comprising:
a deaeration rotor rotatable about an axis and defining a rotor inlet extending circumferentially around the axis, the deaeration rotor including:
an internal ring extending about the axis;
a disc extending about the axis, the disc and the internal ring defining radially therebetween an inner passage of the deaeration rotor downstream of the rotor inlet;
an external ring extending about the axis, the external ring surrounding the internal ring and the disc, the external ring and the disc defining radially therebetween an outer passage of the deaeration rotor downstream of the rotor inlet;
a series of blades circumferentially spaced from one another relative to the axis, the series of blades extending in the outer passage from at least one of the external ring and the disc, the series of blades located radially inward of an annular portion of the outer passage immediately downstream of the series of blades; and

a supply conduit having a supply outlet upstream of the rotor inlet and radially inward of the annular portion of the outer passage.

15. The deaeration system of claim 14 , wherein the annular portion of the outer passage extends circumferentially about the axis unobstructed.

16. The deaeration system of claim 15 , wherein the disc has a body and a lip extending from an upstream side of the body, the lip having an inner lip surface defining an outer boundary of the inner passage and an outer lip surface surrounding the inner lip surface and defining an inner boundary of the annular portion of the outer passage.

17. The deaeration system of claim 16 , wherein the body has an outer disc diameter, the lip located radially inward of the outer disc diameter.

18. The deaeration system of claim 17 , wherein the annular portion of the outer passage surrounds the outer disc diameter.

19. The deaeration system of claim 17 , wherein the series of blades is located radially outward of the internal ring.

20. The deaeration system of claim 17 , wherein the series of blades extends radially outwardly in the outer passage to radially between the rotor inlet and the outer disc diameter.

Assignees

• Pratt & Whitney Canada

Inventors

• Sidorovich Paradiso Ivan

Classifications

• B01D45/12

  by centrifugal forces (centrifuges B04B; cyclones B04C) · CPC title

• B01D45/14

  generated by rotating vanes, discs, drums or brushes · CPC title

• B01D19/0057

  the centrifugal movement being caused by a vortex, e.g. using a cyclone, or by a tangential inlet · CPC title

• F05D2260/98

  Lubrication · CPC title

• F05D2220/323

  for aircraft propulsion, e.g. jet engines · CPC title