公开(公告)号：US20190039727A1

公开(公告)日：2019-02-07

申请号：US15666449

申请日：2017-08-01

Applicant: Bell Helicopter Textron Inc.

Inventor： Mark Adam Wiinikka ,  Nathan Patrick Green ,  John R. McCullough

IPC: B64C27/35 ,  B64C27/48

Abstract: A centrifugal force (CF) bearing for a rotorcraft rotor assembly includes an inner-member, an outer-member, and an elastic member interposed between the inner- and outer-members. The outer-member includes an upper flange extension and a lower flange extension for location to and engagement with a grip. The upper flange extension is disposed over an upper surface portion of the elastic member, and the lower flange extension is disposed under a lower surface portion of the elastic member. The CF bearing is configured for attachment to a grip of the rotor assembly. The outer-member is configured to communicate mechanical loads (e.g., centrifugal force, lateral shear, vertical shear) from the grip to the yoke during operation of the rotor assembly.

公开(公告)号：US20180327089A1

公开(公告)日：2018-11-15

申请号：US15590736

申请日：2017-05-09

Applicant: Bell Helicopter Textron Inc.

Inventor： Glenn Alan Shimek ,  Nathan Patrick Green ,  Robert Alan Self ,  Mark Adam Wiinikka

IPC: B64C27/51 ,  B64C27/39

Abstract: A system and method for attaching a damper to a tail rotor blade includes a cuff that is integral with the rotor blade. The cuff has upper and lower lugs formed by extending a skin over a blade core of the rotor blade. The skin extends past the blade core to the root end of the rotor blade. The rod end of the damper is inserted into an opening between the lugs. The rod end of the damper is coupled to the blade with a bolt through aligned holes in the lugs. The cuff also couples the rotor blade to the grip inside the cuff. The cuff includes a same material as that forming the skin. Sacrificial buffer pads are applied to interior faces of the lugs. The buffer pads permit a distance between the lugs to be machined within a tolerance without removing skin from the cuff.