Rotating coalescing element with directed liquid drainage and gas outlet

Patent metadata

Field	Value
Publication number	US-11504665-B2
Application number	US-202016876509-A
Country	US
Kind code	B2
Filing date	May 18, 2020
Priority date	Aug 28, 2015
Publication date	Nov 22, 2022
Grant date	Nov 22, 2022

Abstract

A rotating coalescer having an ejected coalesced liquid separating device is described. The separating device prevents re-entrainment of liquid into a stream of filtered gas. The rotating coalescer includes a rotating filter element or coalescing cone stack positioned within a rotating coalescer housing. The outer surface of the rotating filter element or the outlet of the coalescing cone stack is displaced from the inner surface of the rotating coalescer housing. The gap between the rotating filter element or the coalescing cone stack and the rotating coalescer housing allows for ejected coalesced liquid, such as oil, to accumulate on the inner surface of the rotating coalescer housing for drainage and allows for filtered gas, such as air, to exit through a clean gas outlet of the rotating coalescer housing.

First claim

What is claimed is:

1. A filtration system comprising:
a filtration system housing having an inlet and an outlet,
a rotating coalescer element positioned within the filtration system housing and in fluid communication with the inlet and the outlet, the rotating coalescer element configured to separate a suspended liquid from a fluid received through the inlet, the rotating coalescer element including:
a first endplate,
a second endplate,
a coalescing device positioned between the first endplate and the second endplate, and
a rotating coalescer housing extending between and coupled to the first endplate and the second endplate, the rotating coalescer housing radially displaced from an outer surface of the coalescing device such that a gap exists between an inner wall of the rotating coalescer housing and the outer surface of the coalescing device, the rotating coalescer housing including:
a clean gas outlet adjacent the first endplate and a liquid outlet adjacent the second endplate; and
a plurality of support ribs to provide support to the coalescing device, each of the plurality of support ribs projecting radially from the inner wall of the rotating coalescer housing inward toward a portion of the outer surface of the coalescing device, the portion of the outer surface of the coalescing device disposed between the first endplate and the second end plate.

2. The filtration system of claim 1 , wherein the plurality of support ribs comprises a first plurality of through-holes configured to allow filtered fluid to pass between the plurality of support ribs.

3. The filtration system of claim 2 , wherein the plurality of support ribs comprises a second plurality of through-holes configured to allow accumulated liquid to pass between the plurality of support ribs.

4. The filtration system of claim 1 , further comprising an axial rib ring extending from a gas outlet end of the rotating coalescer housing.

5. A filtration system comprising:
a filtration system housing having an inlet and an outlet,
a rotating coalescer element positioned within the filtration system housing and in fluid communication with the inlet and the outlet, the rotating coalescer element configured to separate a suspended liquid from a fluid received through the inlet, the rotating coalescer element including:
a first endplate,
a second endplate,
a coalescing device positioned between the first endplate and the second endplate, and
a rotating coalescer housing extending between and coupled to the first endplate and the second endplate, the rotating coalescer housing radially displaced from an outer surface of the coalescing device such that a gap exists between an inner wall of the rotating coalescer housing and the outer surface of the coalescing device, the rotating coalescer housing including:
a clean gas outlet adjacent the first endplate and a liquid outlet adjacent the second endplate;
a plurality of support ribs projecting from the inner wall to provide support to the coalescing device; and
an axial rib ring extending from a gas outlet of the rotating coalescer housing, wherein the axial rib ring extends into the rotating coalescer housing beyond an axial location of a circumferential ring positioned near the gas outlet.

6. A filtration system comprising:
a filtration system housing having an inlet and an outlet,
a rotating coalescer element positioned within the filtration system housing and in fluid communication with the inlet and the outlet, the rotating coalescer element configured to separate a suspended liquid from a fluid received through the inlet, the rotating coalescer element including:
a first endplate,
a second endplate,
a coalescing device positioned between the first endplate and the second endplate, and
a rotating coalescer housing extending between and coupled to the first endplate and the second endplate, the rotating coalescer housing radially displaced from an outer surface of the coalescing device such that a gap exists between an inner wall of the rotating coalescer housing and the outer surface of the coalescing device, the rotating coalescer housing including:
a clean gas outlet adjacent the first endplate and a liquid outlet adjacent the second endplate;
a plurality of support ribs projecting from the inner wall to provide support to the coalescing device; and
an axial rib ring extending from a gas outlet end of the rotating coalescer housing, wherein the axial rib ring prevents accumulated liquid from ejecting directly into the gas outlet.

7. The filtration system of claim 1 , wherein the coalescing device includes a filter media.

8. The filtration system of claim 1 , wherein the coalescing device includes a coalescer cone stack.

9. The filtration system of claim 1 , wherein the rotating coalescer housing is narrower at a first end adjacent to the gas outlet and wider at a second end adjacent to the liquid outlet.

10. The filtration system of claim 9 , wherein the accumulated liquid is drained from the rotating coalescer element against the force of gravity.

11. The filtration system claim 1 , wherein the rotating coalescer element is a high-speed rotating coalescer element that creates a radial g-force at the inner wall of the rotating coalescer housing of at least 1000 times the force of gravity.

12. The filtration system of claim 1 , wherein the fluid is crankcase blowby gas received from an internal combustion engine.

13. The filtration system of claim 1 , wherein the second endplate comprises a plurality of drains.

14. A rotating coalescer element configured to separate a suspended liquid from a fluid, the rotating coalescer element comprising:
a first endplate,
a second endplate,
a coalescing device positioned between the first endplate and the second endplate, and
a rotating coalescer housing extending between and coupled to the first endplate and the second endplate, the rotating coalescer housing radially displaced from an outer surface of the coalescing device such that a gap exists between an inner wall of the rotating coalescer housing and the outer surface of the coalescing device, the rotating coalescer housing including a clean gas outlet adjacent the first endplate and a liquid outlet adjacent the second endplate, the rotating coalesce housing including a plurality of support ribs to provide support to the coalescing device, each of the plurality of support ribs projecting radially from the inner wall of the rotating coalescer housing inward toward a portion of the outer surface of the coalescing device, the portion of the outer surface of the coalescing device disposed between the first endplate and the second endplate.

15. The rotating coalescer element of claim 14 , wherein the plurality of support ribs comprises a first plurality of through-holes configured to allow filtered fluid to pass between the plurality of support ribs.

16. The rotating coalescer element of claim 15 , wherein the plurality of support ribs comprises a second plurality of through-holes configured to allow accumulated liquid to pass between the plurality of support ribs.

17. The rotating coalescer element of claim 14 , further comprising an axial rib ring extending from a gas outlet end of the rotating coalescer housing.

18. A rotating coalescer element configured to separate a suspended liquid form a fluid, the rotating coalescer element comprising:
a first endplate,
a second endplate,
a coalescing device positioned between the first endplate and the second endplate, and
a rotating coalescer housing extending between and cou

Assignees

• Cummins Filtration Ip Inc

Inventors

• Schwandt Brian W
• Holm Christopher E
• Parikh Chirag D
• Paneerselvam Suryanarayanan
• Herman Peter K

Classifications

• B01D50/20

  Combinations of devices covered by groups B01D45/00 and B01D46/00 · CPC title

• F01M13/04

  having means for purifying air before leaving crankcase, e.g. removing oil · CPC title

• B01D46/0056

  with rotational movement · CPC title

• B01D46/26

  rotatable · CPC title

• F01M2013/0438

  with a filter · CPC title