公开(公告)号：EP2488413A1

公开(公告)日：2012-08-22

申请号：EP09850460.8

申请日：2009-10-13

Applicant: Bell Helicopter Textron Inc.

Inventor： STAMPS, Frank, B. ,  TISDALE, Pat ,  MARSHALL, Bryan ,  CAMPBELL, Tom

IPC: B64C27/00

CPC classification number: B64C27/32 ,  B29C35/02 ,  B29C43/18 ,  B29C70/026 ,  B29C70/46 ,  B29K2063/00 ,  B29K2309/08 ,  B29L2031/3088 ,  B64C27/33

Abstract: A method of making a composite rotor yoke includes preparing a molded rotor yoke in a closed cavity tool and possibly machining at least one portion of the molded rotor yoke to form the rotor yoke. In the preferred embodiment, preparing the molded rotor yoke is accomplished by applying layers of uncured low-flow composite material and a layer of uncured high-flow adhesive; substantially enclosing the uncured molded rotor yoke in the closed cavity tool; applying pressure so as to compress the uncured molded rotor yoke; and curing the uncured molded rotor yoke. During the curing process, the high-flow adhesive bleeds out of the molded rotor yoke, thereby preventing marcels from forming through movement of the low-flow composite material.

公开(公告)号：EP2054301A2

公开(公告)日：2009-05-06

申请号：EP06844162.5

申请日：2006-08-17

Applicant: Bell Helicopter Textron Inc.

Inventor： STAMPS, Frank, B. ,  RAUBER, Richard ,  POPELKA, David ,  TISDALE, Pat ,  CAMPBELL, Tom ,  BRASWELL, James, Lee Jr.

IPC: B64C27/12

CPC classification number: B64C27/32 ,  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.