Pressue bulkhead for an aircraft fuselage

Patent metadata

Field	Value
Publication number	US-10220932-B2
Application number	US-201615217474-A
Country	US
Kind code	B2
Filing date	Jul 22, 2016
Priority date	Jul 22, 2015
Publication date	Mar 5, 2019
Grant date	Mar 5, 2019

Abstract

A pressure bulkhead ( 1 ) for an aircraft fuselage ( 3 ) having a sandwich structure ( 5 ) which defines a central axis ( 9 ) and which extends between a circumferential edge area ( 7 ), wherein the sandwich structure ( 5 ) includes an inner cover layer ( 13 ), an outer cover layer ( 17 ), and a core layer ( 19 ), which extends between the inner and outer cover layers ( 13, 17 ) and connects them. The object of providing a pressure bulkhead ( 1 ) for an aircraft fuselage ( 3 ) which, even in the case of larger fuselage diameters, can particularly effectively absorb the occurring pressure forces and which can also be built with minimal weight, is achieved in that, between the inner and the outer cover layers ( 13, 17 ), in addition to the core layer ( 19 ), a support structure ( 23 ) is provided, which is connected to the cover layers ( 13, 17 ) and which extends from the inner cover layer ( 13 ) to the outer cover layer ( 17 ), and in that the support structure ( 23 ) comprises at least one layer ( 25 ) which, viewed in a cross section ( 21 ) parallel to the central axis ( 9 ), extends from a first section ( 7 a ) of the edge area ( 7 ) to an opposite second section ( 7 b ) of the edge area ( 7 ).

First claim

The invention claimed is:

1. A pressure bulkhead for an aircraft fuselage comprising:
a sandwich structure which defines a central axis and which extends between a circumferential edge area, which edge area is configured to be secured to a fuselage structure of an aircraft fuselage, wherein the sandwich structure includes:
an inner cover layer which extends transversely to the central axis,
an outer cover layer which extends opposite the inner cover layer and transversely to the central axis, and
a core layer which extends between the inner and outer cover layers and connects them,
wherein between the inner and the outer cover layer, in addition to the core layer, a support structure is provided, which is connected to the inner and outer cover layers and which extends from the inner cover layer to the outer cover layer, and
the support structure comprises at least one layer which, viewed in a cross section parallel to the central axis, extends from a first section of the edge area to an opposite second section of the edge area.

2. The pressure bulkhead according to claim 1 , wherein the outer cover layer has, viewed in a cross section parallel to the central axis, a convex, continuous and lenticular profile from the first section of the edge area towards the second section of the edge area.

3. The pressure bulkhead according to claim 1 , wherein the inner cover layer has, viewed in a cross section parallel to the central axis, a convex, continuous and lenticular profile from the first section of the edge area towards the second section of the edge area.

4. The pressure bulkhead according to claim 1 , wherein the inner cover layer has, viewed in a cross section parallel to the central axis, a straight profile from the first section of the edge area towards the second section of the edge area.

5. The pressure bulkhead according to claim 1 , wherein the layer is configured as an anchor layer, which extends transversely to the central axis, wherein the support structure comprises a plurality of pins, which extend between the anchor layer and the outer cover layer and between the anchor layer and the inner cover layer, and which are secured with a first end in the anchor layer and with an opposite second end in the outer cover layer or the inner cover layer.

6. The pressure bulkhead according to claim 5 , wherein the anchor layer is a first anchor layer, wherein one or more further anchor layers are provided, which extend transversely to the central axis, and
wherein the pins extend between the different anchor layers as well as between one of the anchor layers and one of the cover layers.

7. The pressure bulkhead according to claim 5 , wherein the anchor layer and/or the pins are formed from fiber-reinforced composite material.

8. The pressure bulkhead according to claim 1 , wherein the support structure comprises at least one profile support member which, viewed in a cross section parallel to the central axis, extends transversely to the central axis from the first section of the edge area to the opposite second section of the edge area,
wherein the profile support member comprises an outer belt section, which lies flat against the outer cover layer, an inner belt section, which lies flat against the inner cover layer, and a web section, which connects the belt sections and which forms the layer.

9. The pressure bulkhead according to claim 8 , wherein the profile support member is a first profile support member,
wherein the support structure comprises a plurality of further profile support members, and
wherein the profile support members, viewed in an axial cross section perpendicular to the central axis, extend either parallel to one another and/or extend transverse to one another or extend radially and/or concentrically relative to the central axis.

10. An aircraft having an aircraft fuselage in which a pressure bulkhead according to claim 1 is installed.

11. A pressure bulkhead for an aircraft fuselage comprising:
a sandwich structure including a central axis and a perimeter in a plane perpendicular to the central axis, wherein the sandwich structure includes a edge area adjacent to and continuous with the perimeter, wherein the edge area is configured to connect to the aircraft fuselage structure, wherein the sandwich structure includes:
an inner cover layer covering a first side of the sandwich structure and extending to the edge area;
an outer cover layer covering a second side, opposite to the first, of the sandwich structure, and extending to the edge area;
a core layer between the inner and outer cover layers and joining the inner cover layer to the outer cover layer;
a support structure between and joining the inner and outer cover layers, and
an support structure layer included with the support structure, wherein the support structure layer extends from a first edge section of the edge area to a second edge section of the edge area, wherein the second edge section is opposite to the first edge section along a line extending through the central axis, and the support structure layer is joined to the first edge section and the second edge section.

12. The pressure bulkhead according to claim 11 , wherein the outer cover layer is continuous and lenticular in a span between the first edge area and the second edge area.

13. The pressure bulkhead according to claim 11 , wherein the inner cover layer is continuous and lenticular in a span between the first edge area and the second edge area.

14. The pressure bulkhead according to claim 11 , wherein the inner cover layer is continuous and planar in a span between the first edge area and the second edge area.

15. The pressure bulkhead according to claim 11 , wherein the support structure includes pins connected to the support structure layer and to the outer cover layer, whereby the pins secure the outer cover layer to the support structure layer.

16. The pressure bulkhead according to claim 15 , wherein the support structure layer includes a first anchor layer and a second anchor layer both transverse to the central axis, and the pins extend between the first and the second anchor layers, and between at least one of the first and second anchor layers and at least one of the inner and outer cover layers.

17. The pressure bulkhead according to claim 15 , wherein the first and second anchor layers and/or the pins are formed of a fiber-reinforced composite material.

18. The pressure bulkhead according to claim 11 , wherein the support structure comprises at least one profile support member which extends between the first edge section and the second edge section,
wherein the at least one profile support member comprises an outer belt section which lies flat against the outer cover layer, an inner belt section which lies flat against the inner cover layer, and a web section connecting the inner and outer belt sections.

19. The pressure bulkhead according to claim 18 , wherein the profile support member is one of a plurality profile support members, and at least some of the profile support members are parallel to each other or extend radially towards the edge area.

Assignees

• Airbus Operations Gmbh

Inventors

• Jorn Paul
• Grase Karim

Classifications

• B64C1/069

  Joining arrangements therefor · CPC title

• B64C1/10 Primary

  Bulkheads · CPC title

• B32B3/06

  for securing layers together; for attaching the product to another member, e.g. to a support {, or to another product, e.g. groove/tongue, interlocking} · CPC title

• B32B2607/00

  Walls, panels · CPC title

• B32B2262/106

  Carbon fibres, e.g. graphite fibres · CPC title