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    HOLLOW BLADE FOR AXIAL GAS-TURBINE ENGINE
    1.
    发明专利
    HOLLOW BLADE FOR AXIAL GAS-TURBINE ENGINE 失效

    公开(公告)号：JPH11132004A

    公开(公告)日：1999-05-18

    申请号：JP24789398

    申请日：1998-09-02

    Applicant: UNITED TECHNOLOGIES CORP

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

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

    Abstract: PROBLEM TO BE SOLVED: To keep a danger of damage of a following blade to a minimum in the case where a break off hollow fan blade comes into collision with the following blade. SOLUTION: A hollow air foil for gas-turbine engine having a leading edge 50, a trailing edge 52, a positive pressure face 54 and a negative pressure face 56 comprises a solid region 78 in which a thickness of a blade chord is increased, and a plurality of buttresses 82, 84, 86, 88. The hollow air foil for gas-turbine engine is selectively strengthened. Accordingly, a danger of breakage of the air foil is reduced in a case where the air foil comes into collision with a following air foil when the air foil is in a braking state.

    ROW OF FLOW DIRECTING ELEMENTS
    2.
    发明专利
    ROW OF FLOW DIRECTING ELEMENTS 审中-公开

    公开(公告)号：JP2002188404A

    公开(公告)日：2002-07-05

    申请号：JP2001356867

    申请日：2001-11-22

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： MONTGOMERY MATTHEW ,  SAMIT MARC ,  OROSA JOHN

    IPC: F01D5/10 ,  F01D5/16 ,  F01D5/26 ,  F01D25/06 ,  F04D29/54 ,  F04D29/66

    Abstract: PROBLEM TO BE SOLVED: To provide an improved row of flow directing elements (10, 12) used in turbomachinery devices. SOLUTION: The row of flow directing elements for which flutter stability has been improved includes at least one high-frequency flow directing element (10) and at least one low frequency flow directing element (12). In a preferred embodiment, the row includes a plurality of alternately installed high-frequency and low-frequency flow directing elements (10, 12). The three lowest frequency vibration modes for the respective high-frequency flow directing elements (10) are higher in frequency at least by 2.0% than the three lowest frequency vibration modes for the respective low frequency flow directing elements (12). The row of this invention is of value especially as a part of a rotor stage in a turbo machinery device.

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