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Publication Title | Ulllted States Patent [19] Rouse CERAMIC RADIAL FLOW TURBINE HEAT SHIELDWITHTURBINETIPSEAL

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Ulllted States Patent [19] Rouse

[54] CERAMIC RADIAL FLOW TURBINE HEAT SHIELDWITHTURBINETIPSEAL

[75] Inventor: GregoryC.Rouse,LosAngeles,Calif.

[73] Assignee: CapstoneTurbineCorporation, Woodland Hils,Calif

[21] ApplNO_09B74916 . .. ,

[22] Filed: Aug.13,1999

51 I t.c1.7 ..F01D 110s

US006155780A

[1] PatentNumber: 6,155,780

[45] DateofPatent: Dec.5,2000

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' ' ' """"""""""""""""""""

58 F,M fS h

[ ] 1e 0 earc """""""""" / _' ’ '5’ spaced radially outwardly from the peripheral tip of the

[56]

41 /173'6’ 178’ 417/407’ 60/39'7 References Cited

US, PATENT DOCUMENTS

rotatable turbine to form a tip clearance betWeen the ring and

the peripheral tip. The turbine comprises a material having a coefficient of thermal expansion at least approximately four times greater than the coef?cient of thermal expansion of the heat shield such that the turbine expands toWard the ring'asaresultofhe'at'Withintheengine,therebyreducing thetipclearancetominimizeair?oWalongthebackfaceand 1mpm"e e?iclencyofthee“glue

10Claims,3DrawingSheets

glitz“;‘a1 4’596’116 6/1986 Mafdeteti'il'

4:613:288 9/1986 Mclnerney ..417/407 5,083,424 1/1992 Becker .................................. 60/3931 5,297,928 3/1994 Imakireeta1..

10 723(79f:137 HR

\ 1 1 1 l4

”\ H4 1r’ l

\\ ~\

'—m\1 \ ‘1

_

5,630,702 5/1997 Marmillac6ta1~~

5,855,112 1/1999Bannaieta1...60/39511

FOREIGNPATENTDOCUMENTS

2271814 4/1994 UnitedKingdom. _

PrimaryExamtner—Edward K. Look AssistantExammer—N1nh Nguyen

Attorney,Agent,orFirm—Brooks&BushmanP.C.

[57] ABSTRACT

A turbine engine includes a rotatable turbine having a

415/1733_415/173/4_ peripheraltipandabackface.Aheatshieldispositioned 415/1'73’ 6_ 415/1'7é adjacent the backface and includes an integral ring extend

41517'3’3 1734 ingfromaperipheraledgeoftheheatshieldtoaposition

Image | Ulllted States Patent [19] Rouse CERAMIC RADIAL FLOW TURBINE HEAT SHIELDWITHTURBINETIPSEAL



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