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    • 3. 发明专利
    • DE69432363T2
    • 2004-02-12
    • DE69432363
    • 1994-10-14
    • HITACHI LTD
    • NAGAOKA YOSHIHIROTANAKA SADASHIIWASE YUKIJIIDA MICHIAKIISHIMARU HIROTOSHIIWASAKI SABUROUEYAMA YOSHIHARUYOSHIDA TETUYA
    • F04D29/22F04D29/30F04D29/42F04D29/44F04D29/66F04D1/06
    • 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.
    • 4. 发明专利
    • DE69433046T2
    • 2004-06-17
    • DE69433046
    • 1994-10-14
    • HITACHI LTD
    • NAGAOKA YOSHIHIROTANAKA SADASHIIWASE YUKIJIIDA MICHIAKIISHIMARU HIROTOSHIIWASAKI SABUROUEYAMA YOSHIHARUYOSHIDA TETUYA
    • F04D29/22F04D29/30F04D29/42F04D29/44F04D29/66
    • 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.
    • 5. 发明专利
    • DE69434033D1
    • 2004-10-28
    • DE69434033
    • 1994-10-14
    • HITACHI LTD
    • NAGAOKA YOSHIHIROTANAKA SADASHIIWASE YUKIJIIDA MICHIAKIISHIMARU HIROTOSHIIWASAKI SABUROUEYAMA YOSHIHARUYOSHIDA TETUYA
    • F04D29/22F04D29/30F04D29/42F04D29/44F04D29/66
    • 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.
    • 6. 发明专利
    • DE69432334T2
    • 2004-02-12
    • DE69432334
    • 1994-10-14
    • HITACHI LTD
    • NAGAOKA YOSHIHIROTANAKA SADASHIIWASE YUKIJIIDA MICHIAKIISHIMARU HIROTOSHIIWASAKI SABUROUEYAMA YOSHIHARUYOSHIDA TETUYA
    • F04D29/22F04D29/30F04D29/42F04D29/44F04D29/66
    • 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.
    • 7. 发明专利
    • DE69433046D1
    • 2003-09-18
    • DE69433046
    • 1994-10-14
    • HITACHI LTD
    • NAGAOKA YOSHIHIROTANAKA SADASHIIWASE YUKIJIIDA MICHIAKIISHIMARU HIROTOSHIIWASAKI SABUROUEYAMA YOSHIHARUYOSHIDA TETUYA
    • F04D29/22F04D29/30F04D29/42F04D29/44F04D29/66
    • 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.
    • 8. 发明专利
    • DE69434033T2
    • 2005-09-22
    • DE69434033
    • 1994-10-14
    • HITACHI LTD
    • NAGAOKA YOSHIHIROTANAKA SADASHIIWASE YUKIJIIDA MICHIAKIISHIMARU HIROTOSHIIWASAKI SABUROUEYAMA YOSHIHARUYOSHIDA TETUYA
    • F04D29/22F04D29/30F04D29/42F04D29/44F04D29/66
    • 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.
    • 9. 发明专利
    • DE69432363D1
    • 2003-04-30
    • DE69432363
    • 1994-10-14
    • HITACHI LTD
    • NAGAOKA YOSHIHIROTANAKA SADASHIIWASE YUKIJIIDA MICHIAKIISHIMARU HIROTOSHIIWASAKI SABUROUEYAMA YOSHIHARUYOSHIDA TETUYA
    • F04D29/22F04D29/30F04D29/42F04D29/44F04D29/66F04D1/06
    • 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.
    • 10. 发明专利
    • DE69432334D1
    • 2003-04-30
    • DE69432334
    • 1994-10-14
    • HITACHI LTD
    • NAGAOKA YOSHIHIROTANAKA SADASHIIWASE YUKIJIIDA MICHIAKIISHIMARU HIROTOSHIIWASAKI SABUROUEYAMA YOSHIHARUYOSHIDA TETUYA
    • F04D29/22F04D29/30F04D29/42F04D29/44F04D29/66
    • 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.