公开(公告)号：DE69827727T2

公开(公告)日：2005-03-31

申请号：DE69827727

申请日：1998-09-10

Applicant: UNITED TECHNOLOGIES CORP

Inventor： SAMIT MARC ,  DUESLER PAUL W ,  WELCH DOUGLAS A ,  MARKHAM PATRICK D ,  PENDA ALLAN R

IPC: F01D5/14 ,  F01D5/18 ,  F02K3/04 ,  F01D5/28

公开(公告)号：DE69827727D1

公开(公告)日：2004-12-30

申请号：DE69827727

申请日：1998-09-10

Applicant: UNITED TECHNOLOGIES CORP

Inventor： SAMIT MARC ,  DUESLER PAUL W ,  WELCH DOUGLAS A ,  MARKHAM PATRICK D ,  PENDA ALLAN R

IPC: F01D5/14 ,  F01D5/18 ,  F02K3/04 ,  F01D5/28

公开(公告)号：GB2310897B

公开(公告)日：1998-05-13

申请号：GB9708591

申请日：1994-10-11

Applicant: UNITED TECHNOLOGIES CORP

Inventor： FRELING MELVIN ,  GRUVER GARY A ,  PARKOS JR JOSEPH JOHN ,  WELCH DOUGLAS A

IPC: F01D5/20 ,  F04D29/02 ,  F04D29/08 ,  F04D29/32 ,  F04D29/38

公开(公告)号：GB2310897A

公开(公告)日：1997-09-10

申请号：GB9708591

申请日：1994-10-11

Applicant: UNITED TECHNOLOGIES CORP

Inventor： FRELING MELVIN ,  GRUVER GARY A ,  PARKOS JR JOSEPH JOHN ,  WELCH DOUGLAS A

IPC: F01D5/20 ,  F04D29/02 ,  F04D29/08 ,  F04D29/32 ,  F04D29/38

公开(公告)号：FR2711181B1

公开(公告)日：1996-06-28

申请号：FR9412223

申请日：1994-10-13

Applicant: UNITED TECHNOLOGIES CORP

Inventor： FRELING MELVIN ,  GRUVER GARY A ,  PARKOS JOSEPH J JR ,  WELCH DOUGLAS A

IPC: F01D5/20 ,  F01D5/28 ,  F04D29/02 ,  F04D29/08 ,  F01D5/14 ,  F04D29/32 ,  F04D29/38 ,  F01D11/12

Abstract: A method and apparatus for increasing blade fatigue strength in a turbine engine. The blades in the turbine engine are configured so as to reduce stress at the tip of the blades during operation of the turbine engine, thus increasing blade fatigue strength. This stress reduction helps to counteract the detrimental effect of abrasive tip coatings on blade fatigue strength. In one embodiment, the tip of the blade is chamfered in order to reduce the stress on the tip of the blade. An abrasive coating is then applied to the tip of the blade to assist the blade in seating into an abradable outer air seal. In another embodiment, an abrasive coating is applied to a center portion of the tip of the blade, with the periphery of the abrasive coating being set back from the opposing surfaces of the blade.

公开(公告)号：GB2282856A

公开(公告)日：1995-04-19

申请号：GB9420419

申请日：1994-10-11

Applicant: UNITED TECHNOLOGIES CORP

Inventor： FRELING MELVIN ,  GRUVER GARY A ,  PARKOS JR JOSEPH JOHN ,  WELCH DOUGLAS A

IPC: F01D5/20 ,  F01D5/28 ,  F01D5/14 ,  F04D29/02 ,  F04D29/08 ,  F04D29/32 ,  F04D29/38

Abstract: The blades 20 in the turbine engine are configured so as to reduced stress at the tip of the blades during operation of the turbine engine, thus helping to counteract the detrimental effect of abrasive tip coatings on blade fatigue strength. In one embodiment, the tip of the blade 20 is chamfered 30 in order to reduce the stress on the tip of the blade. An abrasive coating is then applied to the tip of the blade to assist the blade in seating into an abradable outer air seal. In another embodiment, (figs. 10, 11) an abrasive coating (68) is applied to a center portion of the tip of the blade, with the periphery of the abrasive coating being set back from the opposing surfaces of the blade.