Demister for a gearing system and method

Patent metadata

Field	Value
Publication number	US-11719326-B2
Application number	US-202117502241-A
Country	US
Kind code	B2
Filing date	Oct 15, 2021
Priority date	Apr 19, 2021
Publication date	Aug 8, 2023
Grant date	Aug 8, 2023

Abstract

A demister for a gearing system includes a main body having an inner annular rim coupled to an outer annular rim through a first wall and a second wall opposite from the first wall. The main body is configured to be rotated about a central longitudinal axis to create centrifugal forces that separate oil mist particles from air. First fluid passages extend radially between and through the inner annular rim and the outer annular rim. The first fluid passages include a fluid inlet opening in the outer annular rim and a fluid outlet opening in the inner annular rim. The fluid inlet opening is configured to accept incoming air. The fluid outlet opening is configured to discharge filtered air.

First claim

What is claimed is:

1. A demister for a gearing system, the demister comprising:
a main body having an inner annular rim coupled to an outer annular rim through a first wall and a second wall opposite from the first wall, wherein the main body is configured to be rotated about a central longitudinal axis to create centrifugal forces that separate oil mist particles from air;
first fluid passages extending radially between and through the inner annular rim and the outer annular rim, wherein the first fluid passages include a fluid inlet opening in the outer annular rim and a fluid outlet opening in the inner annular rim, wherein the fluid inlet opening is configured to accept incoming air, and wherein the fluid outlet opening is configured to discharge filtered air; and
second fluid passages extending axially between and through the first wall and the second wall.

2. The demister of claim 1 , wherein a central opening is defined by the inner annular rim and extends between and through the first wall and the second wall.

3. The demister of claim 1 , wherein the first fluid passages do not interfere with the second fluid passages.

4. The demister of claim 1 , wherein the first fluid passages comprise groups of two or more first fluid passages.

5. The demister of claim 4 , wherein each of the groups is disposed between two of the second fluid passages.

6. The demister of claim 1 , wherein each of the first fluid passages is coaxial and aligned with a radial line.

7. The demister of claim 1 , wherein a ridge extends from one of the first wall or the second wall, wherein one or more scallops are formed in the ridge.

8. The demister of claim 1 , wherein the inner annular rim comprises one or more radial recesses formed into an interior edge.

9. The demister of claim 1 , wherein the outer annular rim comprises a conic wall segment that slopes downwardly toward one of the first wall or the second wall.

10. The demister of claim 9 , wherein the outer annular rim comprises fluid slots that connect to the first fluid passages.

11. The demister of claim 10 , wherein the fluid slots further connect to an outer edge of the first wall or the second wall.

12. The demister of claim 1 , wherein a baffle is configured to be disposed around at least a portion of the main body, wherein the baffle is further configured to be secured to a gearbox, and wherein the baffle comprises fluid openings.

13. A gearing system comprising:
a first gear having a central shaft defining a central channel;
a second gear; and
a demister coupled to the first gear and the second gear, wherein the demister comprises:
a main body having an inner annular rim coupled to an outer annular rim through a first wall and a second wall opposite from the first wall, wherein the main body is configured to be rotated about a central longitudinal axis to create centrifugal forces that separate oil mist particles from air;
first fluid passages extending radially between and through the inner annular rim and the outer annular rim, wherein the first fluid passages include a fluid inlet opening in the outer annular rim and a fluid outlet opening in the inner annular rim, wherein the fluid inlet opening is configured to accept incoming air, and wherein the fluid outlet opening is configured to discharge filtered air; and
second fluid passages extending axially between and through the first wall and the second wall.

14. The gearing system of claim 13 , wherein the first fluid passages do not interfere with the second fluid passages.

15. The gearing system of claim 13 , wherein the first fluid passages comprise groups of two or more first fluid passages, and wherein each of the groups is disposed between two second fluid passages that extend between and through the first wall and the second wall.

16. The gearing system of claim 13 , wherein a ridge extends from one of the first wall or the second wall, wherein one or more scallops are formed in the ridge, and wherein the inner annular rim comprises one or more radial recesses formed into an interior edge.

17. The gearing system of claim 13 , wherein the outer annular rim comprises fluid slots that connect to the first fluid passages, and wherein the fluid slots further connect to an outer edge of the first wall or the second wall.

18. The gearing system of claim 13 , further comprising a baffle disposed around at least a portion of the main body, wherein the baffle is further configured to be secured to a gearbox, and wherein the baffle comprises fluid openings.

19. The gearing system of claim 13 , further comprising a barrier filter disposed within the central channel.

20. A demister for a gearing system, the demister comprising:
a main body having an inner annular rim coupled to an outer annular rim through a first wall and a second wall opposite from the first wall, wherein the main body is configured to be rotated about a central longitudinal axis to create centrifugal forces that separate oil mist particles from air; and
first fluid passages extending radially between and through the inner annular rim and the outer annular rim, wherein the first fluid passages include a fluid inlet opening in the outer annular rim and a fluid outlet opening in the inner annular rim, wherein the fluid inlet opening is configured to accept incoming air, wherein the fluid outlet opening is configured to discharge filtered air, wherein the first fluid passages comprise groups of two or more first fluid passages, and wherein each of the groups is disposed between two second fluid passages that extend between and through the first wall and the second wall.

21. A demister for a gearing system, the demister comprising:
a main body having an inner annular rim coupled to an outer annular rim through a first wall and a second wall opposite from the first wall, wherein a ridge extends from one of the first wall or the second wall, wherein one or more scallops are formed in the ridge, and wherein the main body is configured to be rotated about a central longitudinal axis to create centrifugal forces that separate oil mist particles from air; and
first fluid passages extending radially between and through the inner annular rim and the outer annular rim, wherein the first fluid passages include a fluid inlet opening in the outer annular rim and a fluid outlet opening in the inner annular rim, wherein the fluid inlet opening is configured to accept incoming air, and wherein the fluid outlet opening is configured to discharge filtered air.

22. A demister for a gearing system, the demister comprising:
a main body having an inner annular rim coupled to an outer annular rim through a first wall and a second wall opposite from the first wall, wherein the inner annular rim comprises one or more radial recesses formed into an interior edge, and wherein the main body is configured to be rotated about a central longitudinal axis to create centrifugal forces that separate oil mist particles from air; and
first fluid passages extending radially between and through the inner annular rim and the outer annular rim, wherein the first fluid passages include a fluid inlet opening in the outer annular rim and a fluid outlet opening in the inner annular rim, wherein the fluid inlet opening is configured to accept incoming air, and wherein the fluid outlet opening is configured to discharge filtered air.

23. A demister for a gearing system, the demister comprising:
a main body having an inner annular rim couple

Assignees

• Boeing Co

Inventors

• Robuck Mark Joseph
• Ridgley Patrick M
• Eiser Craig W

Classifications

• F16H57/0404 Primary

  Lubricant filters · CPC title

• F16H57/042

  Guidance of lubricant · CPC title

• F16H57/0458

  Oil-mist or spray lubrication; Means to reduce foam formation · CPC title

• F16H57/027

  characterised by means for venting gearboxes, e.g. air breathers · CPC title

• F16N31/02

  Oil catchers; Oil wipers (oil-scraping rings for pistons F16J9/20 {; cleaning means for indicating or measuring dip members, e.g. dipstick wipers G01F23/045}) · CPC title