中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

11 records (took 0.031 seconds)

    Prop-fan
    3.
    发明专利
    Prop-fan 未知

    公开(公告)号：GB2170868A

    公开(公告)日：1986-08-13

    申请号：GB8524280

    申请日：1985-10-02

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： ROTHMAN EDWARD ALLEN ,  VIOLETTE JOHN ALFRED

    IPC: B64C11/18

    Abstract: A prop-fan comprises a plurality of swept rotatable airfoil blades pivotally mounted to a hub for pitch change movement, and has a solidity ratio of 1.0 or more at the roots of the blade and less than 1.0 at the blade tips, the prop-fan being operable at or above critical Mach numbers. In order to reduce the tendancy of the blades to flutter, the leading edge of each blade radially outward from the mid-span position 80 of the blade, is defined by a plurality of points lying substantially in a single plane.

    5.
    发明专利
    未知

    公开(公告)号：DE68912492D1

    公开(公告)日：1994-03-03

    申请号：DE68912492

    申请日：1989-10-06

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： VIOLETTE JOHN ALFRED ,  AUYEUNG SEAN ,  NAGLE DAVID PETER

    IPC: B64C11/06 ,  B64C11/04 ,  F01D5/30 ,  F04D29/32

    Abstract: A propeller or fan blade is rotatably mounted to a blade retention pitch member by means of a pin radially outside of a spinner. By mounting the propeller blade for rotation about the axis of the pin, the blade response to a vibratory excitation in a first mode of vibration is modified such that the twisting motion of the blade is minimized. High speed stability of the blade is enhanced thereby. Moreover a damaged blade may be easily replaced.

    8.
    发明专利
    未知

    公开(公告)号：DE68912492T2

    公开(公告)日：1994-08-18

    申请号：DE68912492

    申请日：1989-10-06

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： VIOLETTE JOHN ALFRED ,  AUYEUNG SEAN ,  NAGLE DAVID PETER

    IPC: B64C11/06 ,  B64C11/04 ,  F01D5/30 ,  F04D29/32

    Abstract: A propeller or fan blade is rotatably mounted to a blade retention pitch member by means of a pin radially outside of a spinner. By mounting the propeller blade for rotation about the axis of the pin, the blade response to a vibratory excitation in a first mode of vibration is modified such that the twisting motion of the blade is minimized. High speed stability of the blade is enhanced thereby. Moreover a damaged blade may be easily replaced.

Patent Agency Ranking