TUROBJET AXISYMMETRIC NOZZLE CONTROLLED HOT FLAP SHUTTER

• US 20060225426A1
• Filed: 09/16/2004
• Published: 10/12/2006
• Est. Priority Date: 09/19/2003
• Status: Active Grant

• Current Assignee: Safran Aircraft Engine Company
• Original Assignee: Snecma Moteurs
• Inventors: Blanchard, Stephane, Pancou, Thierry, Sevi, Guillaume
• Granted Patent: US 7,117,682 B1
• Time in Patent Office: Days
• US Class Current: 60/771
• CPC Class Codes: F02K 1/12 by means of pivoted flaps
• CPC Class Codes: F02K 1/80 Couplings or connections
• CPC Class Codes: F02K 1/805 Sealing devices therefor, e.g. for movable parts of jet pipes or nozzle flaps
• CPC Class Codes: F05D 2300/21 Oxide ceramics
• CPC Class Codes: F05D 2300/603 Composites; e.g. fibre-reinforced
• CPC Class Codes: Y02T 50/60 Efficient propulsion technologies, e.g. for aircraft

Abstract

A controlled hot flap shutter for a turbojet nozzle includes a friction surface made of metal, and including straight lateral flanks to reduce the gap between each controlled hot flap shutter and the tracking flap shutters adjacent thereto.

Claims

1. Turbojet axisymmetric nozzle controlled hot flap shutter, pivoting around an axis perpendicular to the turbojet axis, comprising:

a ceramic composite material flap shutter plate and

a friction surface placed widthways under the flap shutter plate and intended to remain in contact with a nozzle seal, said seal being made of metal, wherein the friction surface is made of metal.

2. Controlled hot flap shutter according to claim 1, wherein the friction surface is limited by two lateral flanks, roughly perpendicular to the friction surface and intended to be positioned opposite and close to the lateral flanks of an adjacent tracking flap shutter.

3. Controlled hot flap shutter according to claim 1, wherein the friction surface is integrated in the controlled hot flap shutter.

4. Controlled hot flap shutter according to claim 3, wherein the friction surface integrated in the a frame during the casting of the controlled hot flap shutter.

5. Controlled hot flap shutter according to claim 1, wherein the friction surface is supported by a support part which is added and attached to the controlled hot flap shutter.

6. Controlled hot flap shutter according to claim 5, wherein the support part is attached between a frame of the controlled hot flap shutter and the flap shutter plate by assembly screws.