Variable pitch impeller
    1.
    发明授权
    Variable pitch impeller 失效
    变桨距叶轮

    公开(公告)号:US4178127A

    公开(公告)日:1979-12-11

    申请号:US585339

    申请日:1975-08-27

    摘要: A system is provided to adjust the operating angle of attack of a variable pitch impeller blade in response to different conditions. The impeller blade is pivotally mounted around a pivot axis and a small control surface attached to the blade provides a turning moment around the pivot axis to oppose a similar moment provided by the lift component of the blade. The operating angle of attack of the blade is determined by the angle at which the moment from the control surface tapers off as it approaches stall range, thus equalizing the moment from the impeller blade.

    摘要翻译: 提供一种系统,以响应于不同的条件来调整变桨距叶轮的操作迎角。 叶轮叶片围绕枢转轴线枢转地安装,并且附接到叶片的小控制表面提供围绕枢转轴线的转动力矩,以抵抗由叶片的提升部件提供的类似力矩。 叶片的操作迎角由控制面瞬间逐渐变小的角度决定,因此平衡叶轮叶片的力矩。