公开(公告)号：DE69112886D1

公开(公告)日：1995-10-19

申请号：DE69112886

申请日：1991-04-11

Applicant: UNITED TECHNOLOGIES CORP

Inventor： HUNTER DAVID H ,  LAUCK KENNETH L ,  WHITE KEVIN A ,  MILNE ROBERT J ,  DOOLIN LEONARD L ,  POULIN STEPHEN V

IPC: B64C27/605

Abstract: The composite scissor assembly utilizes one or more flexible composite straps (21) disposed either in a radial or non-radial relationship between a hub attached to a rotor shaft (24) and an inner or outer ring (26) of a helicopter swashplate (20). The composite material has sufficient edge-wise stiffness to allow effective torque transmission between the rotor shaft (24) and the swashplate (20) yet has sufficient flexibility to allow for a vertical and angular displacement of the swashplate (20) relative to the rotor shaft (24). Utilizing a flexible composite scissor assembly eliminates the need for mechanical linkages having pins and bearings which are a frequent source for wear, increasing the reliability of the rotor assembly, while reducing weight.

公开(公告)号：CA2172283A1

公开(公告)日：1995-06-01

申请号：CA2172283

申请日：1994-10-21

Applicant: UNITED TECHNOLOGIES CORP

Inventor： DOOLIN LEONARD J ,  POULIN STEPHEN V

IPC: B64C27/00 ,  B64C27/33 ,  B64C27/35 ,  B64C27/54 ,  B64C27/48

Abstract: A helicopter rotor (1) has two or more blades which extend from a hub (5) and has adjustment means for adjusting the lead/lag variations of the blades which typically occur due to manufacturing tolerance variations or to changes which occur through operation such as softening of the supporting elastomer dampers. One embodiment of the invention incorporates an end plate (29) on an upper damper (23) with a lug (36) positioned adjacent to a lug (37) on the torque tube (10) such that the end plate of the damper can be changed relative to the longitudinal axis of the blade. For example, a +/- 1/2 degree adjustment can be made in the blade angle relative to the hub to insure that lead/lag errors are reduced. In another embodiment, the damper set includes extended metal shims (49a, 49b) adjacent to the end most laminate plys of the upper and lower dampers such that these shims can be bolted to the end plates of the snubber assemblies for step increasing the stiffness of the assemblies. Utilizing the apparatus of the invention, each blade of the rotor can be adjusted to balance the rotor assembly to minimize vibration.

公开(公告)号：DE69112886T2

公开(公告)日：1996-02-22

申请号：DE69112886

申请日：1991-04-11

Applicant: UNITED TECHNOLOGIES CORP

Inventor： HUNTER DAVID H ,  LAUCK KENNETH L ,  WHITE KEVIN A ,  MILNE ROBERT J ,  DOOLIN LEONARD L ,  POULIN STEPHEN V

IPC: B64C27/605

Abstract: The composite scissor assembly utilizes one or more flexible composite straps (21) disposed either in a radial or non-radial relationship between a hub attached to a rotor shaft (24) and an inner or outer ring (26) of a helicopter swashplate (20). The composite material has sufficient edge-wise stiffness to allow effective torque transmission between the rotor shaft (24) and the swashplate (20) yet has sufficient flexibility to allow for a vertical and angular displacement of the swashplate (20) relative to the rotor shaft (24). Utilizing a flexible composite scissor assembly eliminates the need for mechanical linkages having pins and bearings which are a frequent source for wear, increasing the reliability of the rotor assembly, while reducing weight.

公开(公告)号：CA2039758C

公开(公告)日：1995-03-28

申请号：CA2039758

申请日：1991-04-04

Applicant: UNITED TECHNOLOGIES CORP

Inventor： HUNTER DAVE H ,  LAUCK KENNETH L ,  WHITE KEVIN A ,  MILNE ROBERT J ,  DOOLIN LEONARD J ,  POULIN STEPHEN V

IPC: B64C27/605

Abstract: A flexible composite scissor assembly is disclosed which utilizes one or more composite straps disposed either in a radial or non-radial relationship between a hub attached to a rotor and an inner or outer ring of a helicopter swashplate. The composite material has sufficient edge-wise stiffness to allow effective torque transmission between the rotor shaft and the swashplate yet has sufficient flexibility to allow for a vertical and angular displacement of the swashplate relative to the rotor shaft. Utilizing a flexible composite scissor assembly eliminates the need for mechanical linkages having pins and bearings which are a frequent source for wear, increasing the reliability of the rotor assembly, while reducing weight.