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    Roots type rotary machine
    1.
    发明公开
    Roots type rotary machine 失效
    罗茨Drehkolbenmaschine。

    公开(公告)号：EP0308827A2

    公开(公告)日：1989-03-29

    申请号：EP88115237.5

    申请日：1988-09-16

    申请人： EBARA CORPORATION

    发明人： Niimura, Yasuhiro c/o Ebara Corporation ,  Kikuta, Ritsuo c/o Ebara Corporation ,  Usui, Katsuaki c/o Ebara Corporation

    IPC分类号： F01C1/12

    CPC分类号： F01C1/126 ,  F01C1/084 ,  F04C18/126 ,  F04C2220/10

    摘要： A roots type rotary machine includes rotors having a specific profile whereby any vibration and noise generated by the machine is minimized and its efficiency is increased. The number of lobes of each rotor is 3 or more. The tip and root portions of each rotor are defined by circular arcs (2a, 2b), respectively, which are made smoothly continuous with each other through an involute curve (2C). The ratio of the diameter (D') of the tip circle to the diameter (d') of the root circle is selected to fall within a range which is given by a specific expression.

    摘要翻译： 根型旋转机器包括具有特定轮廓的转子，由此机器产生的任何振动和噪声最小化并且其效率增加。 每个转子的叶数为3个以上。 每个转子的尖端和根部分别由圆弧（2a，2b）限定，它们通过渐开线曲线（2C）彼此平滑地连续。 尖端圆的直径（D'）与根圆的直径（d'）的比值被选择在由特定表达式给出的范围内。