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1. 发明授权

US6371724B2 Centrifugal fluid machine 失效
公开(公告)号：US6371724B2
公开(公告)日：2002-04-16
申请号：US86231301
申请日：2001-05-23
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： F04D29/22 , F04D29/30 , F04D29/42 , 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： At a vaned diffuser or a volute casing of a centrifugal fluid machine, pressure pulsation and vibrating forces acting upon the diffuser or the volute casing are mitigated or cancelled so as to abate the noise from the centrifugal fluid machine. The fluid machine having an impeller 3 rotating about a rotating shaft 2 within a casing 1 and having a vaned diffuser 4 or volute 12 fixed to the casing 1 is constructed such that radius of the vane trailing edge of the impeller 3 and radius of the vane leading edge of the diffuser 4 or radius of the volute tongue is varied in the direction of axis of rotation and inclinations, on a meridional plane, of the vane trailing edge of the impeller 3 and the vane leading edge of the diffuser 4 or the volute tongue are set in the same orientation, thereby reduction in head and efficiency or occurrence of an axial thrust may be restrained to the extent possible to optimally abate the noise and pressure pulsation of the centrifugal fluid machine.

2. 发明专利

DE69432363T2 未知
公开(公告)号：DE69432363T2
公开(公告)日：2004-02-12
申请号：DE69432363
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： F04D29/22 , F04D29/30 , F04D29/42 , F04D29/44 , F04D29/66 , F04D1/06
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.

3. 发明专利

DE3122053A1 未知
公开(公告)号：DE3122053A1
公开(公告)日：1982-03-04
申请号：DE3122053
申请日：1981-06-03
申请人： HITACHI LTD
发明人： IDA MICHIAKI , HAGIWARA NORIAKI , YAMAGO NAOYOSHI , YOSHIOKA MASAHIRO , KIKUCHI KATSUAKI
IPC分类号： F16C27/00 , F16C27/02 , F16C32/06
摘要： A damped bearing for damping the vibration generated in a bearing supporting a rotary shaft and shaft system, by a fluid film damper and by a resilient bearing support. The damped bearing is characterized by having a means in the fluid film damper for adjusting the damping coefficient of the fluid film damper.

4. 发明专利

DE69434033D1 未知
公开(公告)号：DE69434033D1
公开(公告)日：2004-10-28
申请号：DE69434033
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： F04D29/22 , F04D29/30 , F04D29/42 , F04D29/44 , F04D29/66
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.

5. 发明专利

CH653105A5 SCHWINGUNGSGEDAEMPFTE LAGERVORRICHTUNG. 未知
公开(公告)号：CH653105A5
公开(公告)日：1985-12-13
申请号：CH367081
申请日：1981-06-04
申请人： HITACHI LTD
发明人： IDA MICHIAKI , HAGIWARE NORIAKI , YAMAGO NAOYOSHI , YOSHIOKA MASAHIRO , KIKUCHI KATSUAKI
IPC分类号： F16C27/00 , F16C27/02 , F16C32/06

6. 发明专利

DE69433046T2 未知
公开(公告)号：DE69433046T2
公开(公告)日：2004-06-17
申请号：DE69433046
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： F04D29/22 , F04D29/30 , F04D29/42 , F04D29/44 , F04D29/66
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.

7. 发明专利

DE69521855D1 未知
公开(公告)号：DE69521855D1
公开(公告)日：2001-08-30
申请号：DE69521855
申请日：1995-08-24
申请人： HITACHI LTD
发明人： UEYAMA YOSHIHARU , TAKAGI MICHIYUKI , TAKANO YASUSHI , IWASE YUKIJI , IDA MICHIAKI , TANAKA SADASHI , NAGAOKA YOSHIHIRO , YOSHIDA TETSUYA
IPC分类号： F04D29/44 , F04D29/66 , F04D29/40 , F04D13/02 , F04D29/04 , F16D3/84
摘要： In a fluidal machine with an impeller (7) rotating to urge a fluid radially outwardly by a centrifugal force, a vane guiding the fluid discharged from the impeller, a vane member (4) which includes a front end of the vane facing to the impeller so that the fluid discharged from the impeller (7) strikes against the front end and which is prevented from contacting the atmosphere, and a casing (1, 3) surrounding the vane member (4) and contacting the atmosphere, the vane member (4) is discrete from the casing (1, 3), a vibration propagation between the vane member (4) and the casing (1, 3) is prevented or restrained, and a vibration of a pipe (12) extending from the casing (1, 3) is absorbed.

8. 发明专利

DE3483612D1 未知
公开(公告)号：DE3483612D1
公开(公告)日：1990-12-20
申请号：DE3483612
申请日：1984-08-08
申请人： HITACHI LTD
发明人： MORI HIDETOMO , MATSUSHITA OSAMI , MATSUBARA KATSUMI , IDA MICHIAKI , SASAKI SHIGERU
IPC分类号： F16C35/077 , F01C21/02 , F04C29/00 , F04D29/056 , F04D29/059 , F16C27/00 , F16C27/04 , F04C18/14
摘要： The present invention concerns a rotary fluid machine, such as a screw compressor, a centrifugal compressor or a pump, which is provided with a thrust bearing mounting unit which is capable of keeping the natural frequencies of bending vibration of rotors (1, 2) thereof within ranges of permissible values. To provide such a mounting unit (11), the axial rigidity thereof is made to be at least as high as that of the thrust bearings (6, 7), and its radial rigidity is made to be not more than half that thereof, When a radial load is applied to the thrust bearings (6, 7), the bearing mounting unit thus formed is deformed in substantially the radial direction alone, and the thrust bearings bear substantially no radial load.

9. 发明专利

DE69432334T2 未知
公开(公告)号：DE69432334T2
公开(公告)日：2004-02-12
申请号：DE69432334
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： F04D29/22 , F04D29/30 , F04D29/42 , F04D29/44 , F04D29/66
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.

10. 发明专利

DE69433046D1 未知
公开(公告)号：DE69433046D1
公开(公告)日：2003-09-18
申请号：DE69433046
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： F04D29/22 , F04D29/30 , F04D29/42 , F04D29/44 , F04D29/66
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.

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