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    • 8. 发明申请
    • PITCH STOP ASSEMBLY FOR VARIABLE PITCH PROPULSOR
    • PITCH停止组件可变式搅拌器
    • WO1993003258A1
    • 1993-02-18
    • PCT/US1992006306
    • 1992-07-30
    • UNITED TECHNOLOGIES CORPORATION
    • UNITED TECHNOLOGIES CORPORATIONCARVALHO, Paul, A.KUSIAK, Edward, H.
    • F01D07/00
    • B64C11/325F01D7/00F05D2220/36F05D2260/74F05D2260/76Y02T50/66
    • A pitch change system (30) for varying the pitch of the blades (16) of a multibladed propulsor (10) comprises a pitch change actuation assembly (40) and a pitch change drive assembly (70) for selectively actuating the pitch change actuation assembly (40) whenever it is desired to change blade pitch. The pitch change actuation assembly (40) comprises a ballscrew (42), a ballscrew nut (44) threadably mounted to the ballscrew (42), and a pitch stop assembly (100) having a retractable feather stop (135) which in its normal position prevents the ballscrew (42) from driving the ballscrew nut (44) to move the blades (16) beyond the coarse pitch setting corresponding to blade feather, but in its retracted position permits the ballscrew (42) to drive the ballscrew nut (44) to move the blades (16) through feather to a desired reverse pitch setting.
    • 用于改变多叶片推进器(10)的叶片(16)的间距的桨距变化系统(30)包括桨距变化致动组件(40)和变桨驱动组件(70),用于选择性地致动俯仰变化 每当希望改变叶片间距时,致动组件(70)。 螺距改变致动组件(40)包括滚珠丝杠(42),螺纹安装到滚珠丝杠(42)的滚珠丝杠螺母(44)和具有可伸缩羽毛止动件(135)的俯仰停止组件(100) 位置防止滚珠丝杠(42)驱动滚珠丝杠螺母(44)以使叶片(16)移动超过对应于叶片羽毛的粗调俯仰设置,但是在其缩回位置允许滚珠丝杠(42)驱动滚珠丝杠螺母(44) )将叶片(16)通过羽毛移动到期望的反向间距设定。