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    Centrifugal fluid assembly
    72.
    发明公开
    Centrifugal fluid assembly 失效
    离心式流体总成

    公开(公告)号：EP1199478A1

    公开(公告)日：2002-04-24

    申请号：EP01128135.9

    申请日：1994-10-14

    申请人： Hitachi, Ltd.

    发明人： Nagaoka, Yoshihiro ,  Tanaka, Sadashi ,  Iwase, Yukiji ,  Ida, Michiaki ,  Ishimaru, Hirotoshi ,  Iwasaki, Saburo ,  Ueyama, Yoshiharu ,  Yoshida, Tetuya

    IPC分类号： F04D29/44 ,  F04D29/66

    CPC分类号： F04D29/669 ,  F04D1/06 ,  F04D29/2216 ,  F04D29/422 ,  F04D29/428 ,  F04D29/444 ,  F04D29/448 ,  F04D29/661 ,  F04D29/663 ,  F05B2260/96 ,  F05D2240/121 ,  F05D2240/304 ,  F05D2250/52

    摘要： A centrifugal fluid assembly comprises an impeller (3) rotating together with a rotating shaft (2) within a casing (1) about an axis of rotation and impeller vanes (5), each impeller vane (5) having an impeller vane trailing edge (7). The centrifugal fluid assembly further comprises a diffuser (4) fixed to said casing (1) and comprising at least one diffuser vane (6) with a diffuser vane leading edge (8). Projections of the impeller vane trailing edge (7) and of the diffuser vane leading edge (8) onto a meridional plane have the same orientations with respect to each other and a shift occurs in the peripheral position between the impeller vane trailing edge (7) and the diffuser vane leading edge (8), due to the fact that the projections of these edges onto a circular cylinder (A-A: Figs. 3 and 13) coaxial to said axis of rotation are inclined in opposite directions with respect to said axis of rotation (Figs. 3, 4, 13, 14, 15, 19). The difference (I 1 -I 2 ) between the maximum value (I 1 ) and the minimum value (I 2 ) of the peripheral distance between the impeller vane trailing edge (7) and the diffuser vane leading edge (8) is equal to one of n equal parts of the peripheral distance (I 3 ) between said impeller vane trailing edge (7) and the adjacent impeller vane trailing edge (7), wherein n is an integer.

    KREISELPUMPENLAUFRAD RADIALER BAUART
    74.
    发明公开
    KREISELPUMPENLAUFRAD RADIALER BAUART 有权
    泵径向叶轮式

    公开(公告)号：EP1053402A1

    公开(公告)日：2000-11-22

    申请号：EP98966841.3

    申请日：1998-12-21

    申请人： TUCHENHAGEN GmbH

    发明人： STAHLKOPF, Ralf

    IPC分类号： F04D29/22

    CPC分类号： F04D29/2266 ,  F04D29/2216 ,  F05B2230/601

    摘要： The invention relates to a centrifugal pump impeller having a radial structure which combines the advantages of a fully open pump impeller and a closed one, is substantially free from axial flow forces and in which the input conditions and therefore the suction characteristics are improved further in relation to known centrifugal pump impellers. To this end the invention provides for the covering disk segments (4.1; 4.3; 4.5; ...; 4.n-1) and rear side segments (4.2; 4.4; 4.6; ...; 4.n) to each have a through hole (4.1a; 4.3a; 4.5a; ...; 4.n-1a or 4.2a; 4.4a; 4.6a; ...; 4.na). All of said through holes start at an internal diameter defined by a radial formed hub (2a) which is outermost viewed in a radial direction and situated in the input area of the blade channels, and extend radially outwards.

    Centrifugal fluid assembly
    75.
    发明公开
    Centrifugal fluid assembly 失效
    KreiselaggregatfürFluide

    公开(公告)号：EP0984167A2

    公开(公告)日：2000-03-08

    申请号：EP99124491.4

    申请日：1994-10-14

    申请人： HITACHI, LTD.

    发明人： Nagaoka, Yoshihiro ,  Tanaka, Sadashi ,  Iwase, Yukiji ,  Ida, Michiaki ,  Ishimaru, Hirotoshi ,  Iwasaki, Saburo ,  Ueyama, Yoshiharu ,  Yoshida, Tetuya

    IPC分类号： F04D29/66

    CPC分类号： F04D29/669 ,  F04D1/06 ,  F04D29/2216 ,  F04D29/422 ,  F04D29/428 ,  F04D29/444 ,  F04D29/448 ,  F04D29/661 ,  F04D29/663 ,  F05B2260/96 ,  F05D2240/121 ,  F05D2240/304 ,  F05D2250/52

    摘要： A centrifugal fluid assembly comprises an impeller (3) rotating together with a rotating shaft (2) within a volute casing (1a) about an axis of rotation. The impeller (3) comprises impeller vanes (5), each impeller vane (5) having an impeller vane trailing edge (7). The centrifugal fluid assembly moreover comprises a volute tongue (13) of said volute casing (1a). A peripheral distance between an impeller vane trailing edge (7) and the volute tongue (13) is varied in direction of said axis of rotation. A difference (l 1 -l 2 ) between a maximum value (l 1 ) and a minimum value (l 2 ) of the peripheral distance between the impeller vane trailing edge (7) and the volute tongue (13) is equal to one of n equal parts of a peripheral distance (l 3 ) between said impeller vane trailing edge (7) and an adjacent impeller vane trailing edge (7), whereby n is an integer, and a ratio between a radial distance of the impeller vane trailing edge (7) from said axis of rotation and a radial distance of said volute tongue (13) from said axis of rotation is made constant in direction of the axis of rotation. Alternatively a radial distance between an impeller vane trailing edge (7) and a volute tongue (13) is made constant in direction of the axis of rotation.

    摘要翻译： 离心流体组件包括与围绕旋转轴线的蜗壳壳体（1a）内的旋转轴（2）一起旋转的叶轮（3）。 叶轮（3）包括叶轮叶片（5），每个叶轮叶片（5）具有叶轮叶片后缘（7）。 离心流体组件还包括所述蜗壳（1a）的蜗壳舌（13）。 叶轮叶片后缘（7）和蜗壳舌（13）之间的周边距离在所述旋转轴线的方向上变化。 叶轮叶片后缘（7）和蜗壳舌（13）之间的周边距离的最大值（l1）和最小值（l2）之间的差值（l1 -12）等于 所述叶轮叶片后缘（7）和相邻叶轮叶片后缘（7）之间的周边距离（13），其中n是整数，并且叶轮叶片后缘（7）与所述叶轮叶片后缘 旋转轴线和所述蜗形舌片（13）与所述旋转轴线的径向距离在旋转轴线的方向上恒定。 或者，叶轮叶片后缘（7）和蜗形舌（13）之间的径向距离在旋转轴线的方向上保持恒定。