High temperature compliant metallic elements for low contact stress ceramic support

Patent metadata

Field	Value
Publication number	US-10883369-B2
Application number	US-201815913722-A
Country	US
Kind code	B2
Filing date	Mar 6, 2018
Priority date	May 9, 2014
Publication date	Jan 5, 2021
Grant date	Jan 5, 2021

Abstract

A ceramic component retention system includes a metallic component, a ceramic component, and at least one spring element arranged between the metallic component and the ceramic component. The metallic component has a first coefficient of thermal expansion, and the ceramic component has a second coefficient of thermal expansion. The at least one spring element is configured to mechanically couple the ceramic component to the metallic component.

First claim

The invention claimed is:

1. A ceramic component retention system comprising:
a metallic component formed at least in part from a metallic substrate having an outer mounting surface extending along a first plane, the metallic substrate having a first coefficient of thermal expansion;
a ceramic component formed at least in part from a ceramic substrate having a second coefficient of thermal expansion different from the first coefficient of thermal expansion; and
at least one spring element between the metallic component and the ceramic component mechanically coupling the ceramic substrate to the outer mounting surface of the metallic substrate, the at least one spring element comprising:
a retention feature mechanically connected to the outer mounting surface of the metallic substrate;
a conical element mechanically coupled to the retention feature and extending from the metallic substrate in a direction perpendicular to the first plane, the conical element selected from: at least one cone spring, a plurality of Belleville washers, and combinations thereof; and
a contact pad mechanically coupled to the conical element and having a length extending along a second plane parallel to the first plane;
wherein the retention feature extends in the direction perpendicular to the first plane such that deflection of the conical element is limited to an elastic deformation range perpendicular to the first and second planes.

2. The ceramic component retention system of claim 1 , wherein the at least one cone spring is constructed to define a plurality of slots or to include scallop features.

3. The ceramic component retention system of claim 1 , wherein the conical element or contact pad further comprises a powder removal hole configured to allow unsintered powder to be extracted after additive manufacturing of the conical element.

4. The ceramic component retention system of claim 1 , wherein the metallic substrate defines at least one cooling air passage.

5. The ceramic component retention system of claim 1 , further comprising a gasket arranged on the contact pad.

Assignees

• United Technologies Corp

Inventors

• Twelves Jr Wendell V
• Sinnamon Kathleen E
• Kironn Lexia
• Butcher Evan
• Ott Joe
• Lynch Matthew E

Classifications

• F05D2300/6033

  Ceramic matrix composites [CMC] · CPC title

• F01D5/025 Primary

  Fixing blade carrying members on shafts (attachment of a member on a shaft in general F16D1/06; for non-positive displacement pumps F04D29/00) · CPC title

• F05D2300/50212

  dissimilar · CPC title

• Y10T403/217

  Members having different coefficients of expansion · CPC title

• F23R3/007

  constructed mainly of ceramic components · CPC title