Replacement of a lubricant layer bonded to a part of a gas turbine engine
First Claim
1. A method of repairing a part used in a gas turbine engine and having a damaged lubricant layer bonded to a surface of the part, the method comprising:
- removing the damaged lubricant layer from the surface of the part used in a gas turbine engine;
attaching a polymeric film adhesive to the surface of the part, wherein the polymeric film adhesive is stable at an operating temperature of the part; and
attaching a replacement lubricant layer to the polymeric film adhesive.
1 Assignment
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Accused Products
Abstract
A method and system is described herein for repairing a part used in a gas turbine engine, which has a damaged or worn lubricant layer bonded to a surface of the part. After removing the damaged or worn lubricant layer, a polymeric adhesive may be used to attach a replacement lubricant layer to the metal surface. The polymeric adhesive may be a film or a paste. In some embodiments, the adhesive includes a non-metallic filler. The polymeric adhesive is stable at an operating temperature of the part to which it is attached. In one embodiment, the adhesive is polyimide, which is well-suited for use in a high pressure compressor of the gas turbine engine that operates at high temperatures. In other embodiments, the adhesive is bismaleimide (BMI) or cyanate ester.
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Citations
40 Claims
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1. A method of repairing a part used in a gas turbine engine and having a damaged lubricant layer bonded to a surface of the part, the method comprising:
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removing the damaged lubricant layer from the surface of the part used in a gas turbine engine; attaching a polymeric film adhesive to the surface of the part, wherein the polymeric film adhesive is stable at an operating temperature of the part; and attaching a replacement lubricant layer to the polymeric film adhesive. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for repairing a part used in a gas turbine engine and having a damaged lubricant layer bonded to a surface of the part, the system comprising:
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means for removing the damaged lubricant layer from the surface of the part used in a gas turbine engine; a polymeric film adhesive that is stable at an operating temperature of the part and configured to attach to the surface of the part; and a replacement lubricant layer configured to attach to and compress the polymeric film adhesive. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method of repairing a part having a worn lubricant layer bonded to the part, wherein the part is used in a gas turbine engine and exposed to high operating temperatures, the method comprising:
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removing the worn fabric lubricant layer from the part used in a gas turbine engine; and bonding a replacement lubricant layer to the part using a polymeric adhesive that has a non-metallic filler and is stable at an operating temperature of the part. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32)
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33. A repaired part used in a gas turbine engine, the part comprising:
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a surface configured to contact a second surface of a second part; a lubrication layer covering the surface and configured to reduce a coefficient of friction between the part and the second part; and a polymeric adhesive having a non-metallic filler and located between the lubrication layer and the surface of the part to bond the lubrication layer to the surface, wherein the polymeric adhesive is stable at an operating temperature of the part. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40)
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Specification