# US 2018/0023647 A1 · Perforated heat screen for a braked aircraft wheel

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- Number: US 2018/0023647 A1
- Document ID: US20180023647A1
- Status: Published application
- Kind: A1
- Application number: 15/652,342
- Filed: 2017-07-18
- Published: 2018-01-25
- Earliest claimed: 2016-07-19
- Assignees: Safran Landing Systems
- Applicants: Safran Landing Systems
- Inventors: Sébastien REMOND; Jeoffrey CHOPLIN
- Web page: https://patentgrep.com/patent/US20180023647A1

## CPC

- F16D 65/847: with open cooling system, e.g. cooled by air
- B64C 25/42: Arrangement or adaptation of brakes
- F16D 2065/785: {Heat insulation or reflection}
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- B64C: AEROPLANES; HELICOPTERS

## Abstract

The invention provides a method of reducing the cooling time for disks of a brake (5) of an aircraft wheel (1) fitted with a heat screen (10) extending between the wheel and the disks of the brake, and mounted to rotate on aircraft landing gear about an axis of rotation, the method comprising making perforations (11, 12, 13) through the heat screen to allow air heated by the disks to pass through the heat screen towards the wheel, the perforations being provided with obstacles to block any radiation from passing directly from the disks towards the wheel.

## Claims

### Claim 1

A method of reducing the cooling time for disks of a brake (5) of an aircraft wheel (1) fitted with a heat screen (10) extending between the wheel and the disks of the brake, and mounted to rotate on aircraft landing gear about an axis of rotation, the method comprising making perforations (11, 12, 13; 15, 16, 17, 18) through the heat screen to allow air heated by the disks to pass through the heat screen towards the wheel, the perforations being provided with obstacles to block any radiation from passing directly from the disks towards the wheel.

### Claim 2 (depends on 1)

A method according to claim 1, wherein the heat screen comprises an outer sheet (10a), an intermediate sheet (10b), and an inner sheet (10c), offset scoops (11, 12) being formed in the outer and inner sheets, and an orifice (13) being formed in the intermediate sheet between the scoops, the intermediate sheet forming the obstacle that blocks direct radiation.

### Claim 3 (depends on 2)

A method according to claim 2, wherein the scoops (11, 12) extend perpendicularly to an axial direction.

### Claim 4 (depends on 2)

A method according to claim 2, wherein the scoops (14) extend axially.

### Claim 5 (depends on 1)

A method according to claim 1, wherein the heat screen comprises an outer sheet (10a), an intermediate sheet (10b), and an inner sheet (10c), superposed scoops (15, 16) that are open towards the same side being formed in the outer and inner sheets at locations of the heat screen where the sheets are contiguous, while the intermediate sheet (10b) is pierced between the scoops (15, 16) to leave a portion (17) of the intermediate sheet facing the openings of the scoops so as to form the obstacle blocking direct radiation.

### Claim 6 (depends on 1)

A method according to claim 1, wherein the perforation is covered by a shield (19; 20) projecting from an outer face of the heat screen, and forming an obstacle blocking any radiation from passing directly from the disks towards the wheel, while leaving an opening for passing air.

### Claim 7 (depends on 6)

A method according to claim 6, wherein the shield (19) is secured to the heat screen by folding.

### Claim 8 (depends on 6)

A method according to claim 6, wherein the shield (20) is secured to the heat screen by fastener tabs (21) extending from the perforation that is covered by the shield.

### Claim 9 (depends on 8)

A method according to claim 8, wherein the shield has a peripheral dropped edge (22).

### Claim 10 (depends on 1)

A heat screen including perforations arranged and shaped to perform the method according to claim 1.