Helicopter rotors,申请号US19790039492-传众专利搜索

Helicopter rotors

申请公布号：US4297078(A)

申请号：US19790039492

申请日期：1979.05.09

申请公布日期：1981.10.27

申请人：

WESTLAND AIRCRAFT LIMITED

发明人：MARTIN, ALFRED C.

分类号：B64C27/32;B64C27/35;(IPC1-7):B64C27/38

主分类号：B64C27/32

摘要：A helicopter rotor includes a rotor head arranged to support a plurality of rotor blades for rotation about an axis. The rotor head comprises a generally hollow structure, and each rotor blade is supported by an elastomeric bearing arranged to permit blade flap, lead/lag and feathering movements. A resilient support means is housed within the structure and is operatively associated with each rotor blade so as to provide controlled restraint of rotor blade movements in the blade flap plane. In the illustrated embodiment, the support means comprises interconnected inner and outer elastomeric assemblies, the outer assembly being connected to each rotor blade through a common elastomeric lead/lag damper unit which provides inter-blade damping of blade lead/lag movements. The outer elastomeric assembly also provides an automatic blade droop stop.