Air filter for bleed valve assembly

Patent metadata

Field	Value
Publication number	US-10512876-B2
Application number	US-201715431108-A
Country	US
Kind code	B2
Filing date	Feb 13, 2017
Priority date	Feb 13, 2017
Publication date	Dec 24, 2019
Grant date	Dec 24, 2019

Abstract

An air filter assembly includes an air filter element with a pleated filter and seals incorporated at either end to prevent contaminants from bypassing the filter. The air filter assembly includes a filter cover, first, second and third seals, and an air filter element with a large diameter and low micron rating.

First claim

The invention claimed is:

1. An air filter arrangement comprising:
a filter cover;
an air filter element with a diameter ranging between 1.400 and 1.420 inches, the air filter element having an absolute micron rating of 5 microns wherein the air filter element comprises a high capacity pleated filter;
a first seal sealingly engaged to the filter cover and to the air filter element;
a second seal sealingly engaged to the filter cover and to the air filter element; and
a third seal sealingly engaged to the air filter element and a housing near an inlet flow path.

2. The air filter assembly of claim 1 , wherein the air filter assembly has a length between 2.025 inches and 2.045 inches.

3. The air filter assembly of claim 1 , wherein the air filter element has a length between 1.480 inches and 1.500 inches.

4. The air filter assembly of claim 1 , wherein the air filter assembly has a diameter between 1.495 inches and 1.505 inches.

5. The air filter assembly of claim 1 , wherein the air filter element is made of a material selected from the group consisting of nickel, cobalt or an alloy thereof.

6. The air filter assembly of claim 1 , wherein the first, second and third seals are made of a material selected from the group consisting of nickel, cobalt or an alloy thereof.

7. The air filter assembly of claim 1 , further comprising at least one circular drill path extending from a bleed air source to the air filter element.

8. The air filter assembly of claim 1 , further comprising a first circular drill path extending from the air filter element to a first outlet.

9. The air filter assembly of claim 8 , further comprising a second circular drill path extending from the air filter element to a second outlet.

10. A method of filtering incoming bleed air comprising:
receiving bleed air from an engine;
routing the bleed air through an inlet path;

filtering the bleed air through an air filter arrangement comprising:
a filter cover;
an air filter element with a diameter ranging between 1.400 and 1.420 inches, the air filter element having an absolute micron rating of 5 microns, wherein the air filter element comprises a high capacity pleated filter;
a first seal sealingly engaged to the filter cover and to the air filter element;
a second seal sealingly engaged to the filter cover and to the air filter element; and
a third seal sealingly engaged to the air filter element and a housing near the inlet flow path; and
delivering the bleed air through an outlet path.

11. The method of claim 10 , further comprising passing the bleed air through a separator with a rating of 40 microns prior to routing the bleed air through an inlet path.

12. The method of claim 10 , wherein the air filter element is sealed such that there is negligible leakage of bleed air out of the air filter element.

13. An air filter arrangement comprising:
a filter cover;
an air filter element with a diameter ranging between 1.400 and 1.420 inches, the air filter element having an absolute micron rating of 5 microns wherein the air filter element comprises a high capacity pleated filter;
a first seal sealingly engaged to the filter cover and to the air filter element;
a second seal sealingly engaged to the filter cover and to the air filter element; and
a third seal sealingly engaged to the air filter element and a housing near an inlet flow path;
wherein the first seal has a larger diameter than the second seal and the first seal is configured to prevent external leakage of fluid or contaminants going through the air filter element and the second seal is configured to prevent bypass of contaminants around the air filter element.

14. The air filter arrangement of claim 13 , wherein the air filter element is made of a material selected from the group consisting of nickel, cobalt or an alloy thereof and the first, second and third seals are made of a material selected from the group consisting of nickel, cobalt or an alloy thereof.

Assignees

• Hamilton Sundstrand Corp

Inventors

• Mercier James J
• Kamp Josh

Classifications

• B01D46/0047

  for discharging the filtered gas · CPC title

• F02C9/18

  by bleeding, bypassing or acting on variable working fluid interconnections between turbines or compressors or their stages {(F02C3/113 takes precedence)} · CPC title

• F05D2260/607

  Preventing clogging or obstruction of flow paths by dirt, dust, or foreign particles · CPC title

• B01D2258/06

  Polluted air · CPC title

• B01D46/0004

  Details of removable closures, lids, caps or filter heads · CPC title