Screw spindle vacuum pump and operating method
    2.
    发明授权
    Screw spindle vacuum pump and operating method 失效
    螺杆主轴真空泵及操作方法

    公开(公告)号:US06273696B1

    公开(公告)日:2001-08-14

    申请号:US09445705

    申请日:1999-12-09

    IPC分类号: F01C116

    CPC分类号: F04C29/04 F04C2240/402

    摘要: Screw-spindle vacuum pump with at least three closed-off feed chambers located one behind the other along each rotor and method for operating this compressor. The chamber which is last on the delivery side is brought virtually to the compression limit pressure by means of pre-admission, shortly before it opens towards the delivery side, by supplying a pre-admission stream which is at least five times as great as the intake mass stream. A precondition, in this case, is a minimum ratio of external compression to internal compression of five.

    摘要翻译: 螺杆式真空泵具有至少三个闭合进料室,每个转子沿着每个转子一个位于另一个之间,并且用于操作该压缩机的方法。 最后一次在出口侧的舱室通过预先准入,在通向出口侧之前不久就通过提供至少为五分之一的预进入流量而实际上被压缩至极限压力 进气质量流。 在这种情况下,前提条件是外部压缩与内部压缩的最小比例为5。

    Vacuum pump
    3.
    发明授权
    Vacuum pump 失效
    真空泵

    公开(公告)号:US5904473A

    公开(公告)日:1999-05-18

    申请号:US973884

    申请日:1997-12-17

    摘要: A vacuum pump contains two rotary displacement rotor (8) that engage each other, in particular in a convoluted manner, inside in expansion chamber through which flows a stream in the axial direction. The rotors are mounted in cantilever at the delivery side and are linked each to a driving motor (35, 36). Each rotor (8) forms together with its shaft (20), a stationary bearing body (7) and a bearing (21, 22) delimited by the shaft (20) and the bearing body (7) a module that may be removed as a single unit from the housing (3). The rotor (35) of the driving motor is preferably also part of said module.

    摘要翻译: PCT No.PCT / EP96 / 02630 Sec。 371 1997年12月17日第 102(e)1997年12月17日PCT PCT 1996年6月18日PCT公布。 出版物WO97 / 01037 日期1997年1月9日真空泵包含两个旋转位移转子(8),其特别是以回旋方式彼此接合,在膨胀室内部,流体沿轴向流动。 转子在输送侧安装在悬臂中,并且各自连接到驱动电动机(35,36)。 每个转子(8)与其轴(20),固定轴承体(7)和由轴(20)和轴承体(7)限定的轴承(21,22)一起形成一个可以作为 一个单元从外壳(3)。 驱动马达的转子(35)优选地也是所述模块的一部分。