Systems and methods for reducing oxidation of friction disks

Patent metadata

Field	Value
Publication number	US-2021381568-A1
Application number	US-202117410740-A
Country	US
Kind code	A1
Filing date	Aug 24, 2021
Priority date	Mar 22, 2019
Publication date	Dec 9, 2021
Grant date	—

Abstract

A system, and associated method, for reducing oxidation of a friction disk may include a braking assembly comprising the friction disk and a coolant loop coupled to the braking assembly, with the coolant loop being configured to circulate liquid coolant from the braking assembly. That is, the coolant loop may be configured to reduce the temperature of the braking assembly, thus reducing the rate/extent of oxidation of the friction disks and potentially enabling the concentration of oxygen around the braking assembly to be reduced.

First claim

What is claimed is:

1 . A method for reducing oxidation of a friction disk of a braking assembly of an aircraft, the method comprising:
determining a status of the braking assembly, wherein the status pertains to a likelihood of oxidation of the friction disk of the braking assembly; and based on the status of the braking assembly, circulating a liquid coolant to the braking assembly to transfer heat from the friction disk to the liquid coolant.

2 . The method of claim 1 , further comprising, based on the status of the braking assembly, delivering an inert fluid to the braking assembly to reduce oxidation of the friction disk.

3 . The method of claim 2 , wherein the determining the status comprises at least one:
comparing an aircraft speed to a threshold aircraft speed; comparing an aircraft deceleration to a threshold aircraft deceleration; comparing a temperature of the braking assembly to a threshold temperature of the braking assembly; comparing a braking force of the braking assembly to a threshold braking force; and determining if an aircraft landing event is occurring.

4 . The method of claim 3 , wherein the inert fluid comprises a nitrogen-enriched air stream.

5 . The method of claim 4 , further comprising configuring a membrane of an inert fluid source to separate the nitrogen-enriched air stream from air.

6 . The method of claim 1 , wherein circulating the liquid coolant to the braking assembly comprises routing the liquid coolant through a liquid coolant line defined, at least partially, by a torque tube of the braking assembly.

7 . The method of claim 6 , further comprising configuring at least one of a heat shield of the braking assembly or a wheel of the braking assembly to limit ambient airflow around the friction disk.

8 . The method of claim 6 , further comprising thermally coupling a heat exchanger to the liquid coolant line.

9 . The method of claim 8 , further comprising operably coupling a liquid coolant pump to the liquid coolant line, wherein the liquid coolant line comprises a coolant loop, and wherein the liquid coolant pump is configured to drive circulation of the liquid coolant through the coolant loop.

10 . The method of claim 9 , wherein the coolant loop comprises:
a first line configured to deliver the liquid coolant to the braking assembly; a second line configured to deliver the liquid coolant from the braking assembly to the heat exchanger; and a third line configured to deliver the liquid coolant from the heat exchanger to the liquid coolant pump.

Assignees

• Goodrich Corp

Inventors

• Cocks Peter A T
• Filburn Thomas P
• She Ying
• Cordatos Haralambos
• Dardas Zissis A
• May William P

Classifications

• F16D65/853 Primary

  with closed cooling system · CPC title

• F16D55/36 Primary

  Brakes with a plurality of rotating discs all lying side by side · CPC title

• F16D2065/783

  cooling control or adjustment · CPC title

• F16D2200/0052

  Carbon · CPC title

• F16D2055/0058

  Fully lined, i.e. braking surface extending over the entire disc circumference · CPC title