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    DUAL SERIES DAMPER SYSTEM
    112.
    发明专利
    DUAL SERIES DAMPER SYSTEM 未知

    公开(公告)号：CA2831584A1

    公开(公告)日：2012-11-01

    申请号：CA2831584

    申请日：2011-04-26

    Applicant: BELL HELICOPTER TEXTRON INC

    Inventor： YUCE MITHAT ,  POPELKA DAVID A ,  STAMPS FRANK B ,  WIINIKKA MARK A

    IPC: B64C27/51

    Abstract: A dual series damper includes a fluid damper portion and a elastomeric damper portion. The fluid damper portion includes a first housing, a first connection member, and a piston coupled to the first connection member. The piston divides an interior of the first housing into a first fluid chamber and a second fluid chamber. The piston has a fluid passage in the piston, the fluid passage being configured to provide fluid communication between the first fluid chamber and the second fluid chamber. The elastomeric damper portion includes a second housing, a second connection member coupled to the second housing, and an elastomer between the first housing and the second housing. When a lead/lag force is introduced to the dual series damper, the fluid damper portion behaves rigidly so that the elastomeric damper portion dampens the lead/lag oscillation.

    115.
    发明专利
    未知

    公开(公告)号：BRPI0621904A2

    公开(公告)日：2011-12-20

    申请号：BRPI0621904

    申请日：2006-08-17

    Applicant: BELL HELICOPTER TEXTRON INC

    Inventor： STAMPS FRANK B ,  RAUBER RICHARD ,  POPELKA DAVID ,  TISDALE PATRICK R ,  CAMPBELL THOMAS C ,  BRASWELL JAMES LEE JR

    IPC: B64C27/35

    Abstract: A torque coupling for a rotor head of a rotary-wing aircraft is configured for rotation with a mast and for causing rotation of an attached yoke. The coupling has trunnions that rotate with the mast and extend generally radially. Pad-bearing assemblies each have a central member coupled to one of the trunnions with a laminated spherical bearing and have laminated pad bearings affixed to opposing sides of the central member. The laminated bearings have alternating rigid and elastomeric layers. A bearing mount is affixed to each pad bearing and is connected to a yoke for rotating the yoke with the mast. The pad-bearing assemblies allow for relative motion between each central member and the associated trunnion and between each central member and the bearing mounts through elastic shear deformation, and this allows for gimballing of the attached yoke relative to the mast.

    116.
    发明专利
    未知

    公开(公告)号：BRPI0621713A2

    公开(公告)日：2011-12-20

    申请号：BRPI0621713

    申请日：2006-06-20

    Applicant: BELL HELICOPTER TEXTRON INC

    Inventor： STAMPS FRANK B ,  RAUBER RICHARD

    IPC: B63H1/00

    Abstract: A centrifugal force bearing having a means for providing a steady pitching moment is disclosed. The centrifugal force bearing may optionally comprise a coning means. A rotor system having the centrifugal force bearing is disclosed. A rotary-wing aircraft having the centrifugal force bearing is disclosed.

    VARIABALE STIFFNESS LIQUID INERTIA VIBRATION ELIMINATOR
    118.
    发明专利
    VARIABALE STIFFNESS LIQUID INERTIA VIBRATION ELIMINATOR 未知

    公开(公告)号：CA2789340A1

    公开(公告)日：2011-08-25

    申请号：CA2789340

    申请日：2011-02-15

    Applicant: BELL HELICOPTER TEXTRON INC

    Inventor： SMITH MICHAEL R ,  STAMPS FRANK B

    IPC: B64D27/00

    Abstract: A variable stiffness liquid inertia vibration isolation device includes a liquid inertia vibration elimination isolator and a variable stiffness spring operably associated with the liquid inertia vibration elimination isolator for varying the stiffness of the liquid inertia vibration isolator. The variable stiffness spring may include an elastomeric pad exhibiting a first stiffness along a first axis and a second stiffness, significantly greater than the first stiffness, along a second axis that is perpendicular to the first axis.

    APPARATUS FOR IMPROVED VIBRATION ISOLATION
    119.
    发明专利
    APPARATUS FOR IMPROVED VIBRATION ISOLATION 未知

    公开(公告)号：CA2780953A1

    公开(公告)日：2011-06-09

    申请号：CA2780953

    申请日：2009-12-01

    Applicant: BELL HELICOPTER TEXTRON INC

    Inventor： SMITH MICHAEL R ,  STAMPS FRANK B

    IPC: F16F7/10

    Abstract: A vibration isolator having an upper housing defining an upper fluid chamber, a lower housing defining a lower fluid chamber, a piston resiliently disposed within the upper housing and the lower housing, a tuning passage defined by the piston, for providing fluid communication between the upper fluid chamber and the lower fluid chamber, a tuning fluid disposed within the tuning passage, the upper fluid chamber, and the lower fluid chamber. A reservoir in fluid communication with the upper fluid chamber for providing pressurization control of the vibration isolator. An expanded accumulator region for providing Increased pressure retention during maintenance and operation of the vibration isolator.

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