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    • 5. 发明授权
    • Blade pitch control mechanism for helicopters
    • 直升机叶片桨距控制机构
    • US4047838A
    • 1977-09-13
    • US669411
    • 1976-03-22
    • Donald L. FerrisRobert L. Faiz
    • Donald L. FerrisRobert L. Faiz
    • B64C27/72B64C27/605B64C27/10
    • B64C27/605
    • Pitch control linkage for the upper rotor of coaxial counterrotating rotors utilizes conventional swashplate, control rod and servomotor elements for changing blade pitch but without the conventional rotating and non-rotating scissors for reacting swashplate torque. This is accomplished by the use of rotating and non-rotating walking beams and combination torque reacting control rods between the walking beams and the rotatable and non-rotatable swashplate elements. Means are also disclosed for shimming the rotatable walking beams to achieve pre-track adjustment of the pitch of individual blades.
    • 同轴反转转子上转子的间距控制联动使用传统的旋转斜盘,控制杆和伺服电机元件来改变叶片间距,但没有常规的旋转和非旋转剪刀用于使斜盘扭矩反应。 这是通过在步进梁和可旋转和不可旋转的斜盘元件之间使用旋转和非旋转步进梁以及组合的扭矩反应控制杆来实现的。 还公开了用于对可旋转的步进光束进行匀场以实现单个叶片间距的预跟踪调整的装置。