Fan case ballistic liner and method of manufacturing same

Patent metadata

Field	Value
Publication number	US-9644493-B2
Application number	US-201213606079-A
Country	US
Kind code	B2
Filing date	Sep 7, 2012
Priority date	Sep 7, 2012
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

A method of manufacturing a fan case with a liner includes the steps of providing a preform having a circular cross-section with a cut and a first diameter, flexing the preform to reduce the first diameter to a second diameter, and adhering the preform to an inner surface of a fan case. A fan case for a gas turbine engine includes a fan case body having an inner surface. A preform is adhered to the inner surface and has a cut providing a gap.

First claim

What is claimed is:

1. A method of manufacturing a fan case with a liner, comprising the steps of:
providing a preform having a circular cross-section with a cut and a first diameter, the cut providing a gap between adjacent edges;
flexing the preform to reduce the first diameter to a second diameter by moving the edges toward one another; and
adhering the preform to an inner surface of a fan case.

2. The method according to claim 1 , wherein the providing step includes wrapping a reinforcing material about a mandrel to provide the preform with multiple layers.

3. The method according to claim 2 , wherein the providing step includes unrolling the reinforcing material onto the mandrel with adhesive embedded in the reinforcing material.

4. The method according to claim 3 , wherein the providing step includes vacuum-bagging and curing the preform to provide a rigid cylindrical structure.

5. The method according to claim 2 , wherein the providing step includes a preform having a length that is greater than a width of the liner.

6. The method according to claim 5 , wherein the providing step includes sectioning the preform to provide multiple preforms having the same first diameter, the multiple preforms having different size cuts.

7. The method according to claim 2 , wherein the providing step includes a preform having multiple plies.

8. The method according to claim 1 , wherein the providing step includes cutting the preform at an angle to provide the gap and the adjacent edges.

9. The method according to claim 1 , wherein the preform is constructed from a PPT, and the fan case is a composite material.

10. The method according to claim 1 , wherein the adhering step includes adhering a first preform to the fan case.

11. The method according to claim 10 , wherein the adhering step includes adhering a second preform to the first preform.

12. The method according to claim 11 , wherein the second preform has a larger gap provided by the cut than the first preform.

13. The method according to claim 12 , wherein first and second cuts of the first and second preforms are circumferentially spaced relative to one another.

14. The method according to claim 11 , wherein the adhering step includes arranging a film adhesive onto the preform.

Assignees

• Clarkson Steven
• United Technologies Corp

Inventors

• Clarkson Steven

Classifications

• B29C53/562

  spirally · CPC title

• F01D25/24

  Casings (modified for heating or cooling F01D25/14); Casing parts, e.g. diaphragms, casing fastenings (casings for rotary machines or engines in general F16M {; special arrangements in stators dealing with breaking-off of part of rotor F01D21/045}) · CPC title

• B29C63/34

  using tubular layers or sheathings · CPC title

• F02C7/045

  having provisions for noise suppression · CPC title

• F01D21/045 Primary

  special arrangements in stators or in rotors dealing with breaking-off of part of rotor · CPC title