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1. 发明专利

JP2003307200A Centrifugal fluid machine 有权
标题翻译：离心流体机
公开(公告)号：JP2003307200A
公开(公告)日：2003-10-31
申请号：JP2003153682
申请日：2003-05-30
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NAGAOKA YOSHIHIRO , TANAKA TEIJI , IWASE KOJI , IDA DOSHU , ISHIMARU HIROTOSHI , IWASAKI SABURO , UEYAMA TOSHIHARU , YOSHIDA TETSUYA
IPC分类号： F04D1/08 , F04D29/22 , F04D29/24 , F04D29/42 , F04D29/44 , F04D29/66
CPC分类号： F04D29/428
摘要： PROBLEM TO BE SOLVED: To reduce noise in a diffuser with vanes or a volute casing of a centrifugal fluid machine by easing pressure pulsation and vibrating force acting on the diffuser or the volute, or by canceling the pressure pulsation and the vibrating force each other.
SOLUTION: The fluid machine comprises an impeller 3 rotating around a rotation shaft 2 inside the casing 1 and the vaned diffuser 4 of the volute 12 fixed to the casing 1. Diameters of following edge of the impeller 3 and leading edge of the diffuser 4 or a cut-off are changed to the direction of the rotation shaft center line in order to incline the following edge of the impeller 3 and the diffuser 4's leading edge or the cut-off to the same direction on a meridian plane.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：通过减轻作用在扩散器或蜗壳上的压力脉动和振动力，或通过消除压力脉动和振动力来减小离心式流体机械的叶片或蜗壳的扩散器中的噪声彼此。解决方案：流体机械包括围绕壳体1内的旋转轴2旋转的叶轮3和固定到壳体1的蜗壳12的带叶片扩散器4.叶轮3的后缘的边缘和扩散器4或截止孔改变为旋转轴中心线的方向，以便在子午线平面上将叶轮3的后缘和扩散器4的前缘或截止线倾斜到同一方向。版权所有（C）2004，JPO

2. 发明专利

JP2001234893A AXIAL BLOWER 失效
公开(公告)号：JP2001234893A
公开(公告)日：2001-08-31
申请号：JP2000052093
申请日：2000-02-23
申请人： HITACHI LTD
发明人： NISHIOKA TAKAHIRO , ISHIMARU HIROTOSHI , TANAKA TEIJI , TERASAKA HIDETOSHI
IPC分类号： F04D19/00 , F04D29/38 , F04D29/66
摘要： PROBLEM TO BE SOLVED: To attain the high load, high efficiency and wide working range of an axial blower by reducing the loss of a blade profile used for the axial blower, and preventing separation generated near a leading edge in the case of an inflow angle being large. SOLUTION: In the blade profile used for a rotor blade 1 or a stator blade 2 of the axial blower, camber lines 9, 10 are formed of two quadratic curves so as to be maximum at the position of 40% to 50% of blade chord length. Blade thickness distribution of the blade profile is formed of three biquadratic curves so as to be maximum in the position of 30% to 40% of the blade chord length 12.

3. 发明专利

JP2001149919A FLOATATION TYPE PURIFIER 失效
公开(公告)号：JP2001149919A
公开(公告)日：2001-06-05
申请号：JP33547099
申请日：1999-11-26
申请人： HITACHI LTD
发明人： IWASE HIROSHI , TANAKA TEIJI , ARAI NOBUKATSU , NAGAOKA YOSHIHIRO
IPC分类号： C02F1/24 , B03D1/14
摘要： PROBLEM TO BE SOLVED: To provide a floatation type purifier having an air saturating means capable of suppressing an operating cost. SOLUTION: This floatation type purifier is provided with a closed chamber, a pump which is connected with the chamber and supplies water into the chamber, a first compressor which supplies air into the chamber and pressurizes the inside of the chamber, a second compressor which is connected with the chamber and supplies the air in the chamber into the water stored in the chamber and a purifying part into which the water flowing out through a discharging port from the inside of the chamber and the water which is the object to be treated flow.

4. 发明专利

JP2001073994A ELECTRIC AIR BLOWER AND ELECTRIC VACUUM CLEANER THEREWITH 失效
公开(公告)号：JP2001073994A
公开(公告)日：2001-03-21
申请号：JP24479799
申请日：1999-08-31
申请人： HITACHI LTD
发明人： HAYASHI SHOJI , TANAKA TEIJI , SUGIMURA KAZUYUKI , SATO SHIGENORI , JORAKU FUMIO
IPC分类号： A47L9/00 , F04D17/10 , F04D25/08 , F04D29/30 , F04D29/44
摘要： PROBLEM TO BE SOLVED: To rotate flow of air from a centrifugal impeller at a diffuser part with a good efficiency serving dynamic pressure as static pressure, and improve an air blower efficiency by arranging a recessed part on a part of an outer end part opposed to a diffuser of the blade in a centrifugal impeller. SOLUTION: An electric air blower is provided with a centrifugal impeller 12 and a diffuser 11 having a plurality of air guides 11a disposed on an outer peripheral part of the centrifugal impeller 12. A cutout part 12e is disposed on a part of an outer end part of the blade 12a other than a shroud side plate 12e side of the centrifugal impeller 12. In a part where the cutout 12e is disposed on the blade 12a, the blade 12 is apparently formed in a small size comparing with a part other than the cutout part 12e. In flow 12 of air that flows out from an outlet part of the centrifugal impeller 12, main flow slantly flows a part where the cutout part is not disposed on the blade 12. Namely, in the flow 102 of air which flows in the diffuser 11, main flow slantly flows also a wall surface side of a fan casing side of the diffuser 11.

5. 发明专利

JP2000136800A SUSPENDED MATTER DISCHARGE PUMP AND DRAINAGE 失效
公开(公告)号：JP2000136800A
公开(公告)日：2000-05-16
申请号：JP31192398
申请日：1998-11-02
申请人： HITACHI LTD
发明人： TANAKA TEIJI , IWASE HIROSHI , YODA HIROAKI
IPC分类号： E02B15/04 , F04F5/10
摘要： PROBLEM TO BE SOLVED: To ensure removal of suspended maters in effluent with less workers and discharge of the effluent. SOLUTION: A drainage 3 provided with a screen 32 for removing suspended matters 56 and a drain pump 5 for draining effluent from which the suspended matters are removed comprises a jet pump 16 for sucking effluent containing the suspended matters 56 from a suction part 18 provided upstream of the screen 32 and discharging it from a nozzle 22 provided at the discharge side of the drain pump 5 while bypassing the drain pump 5, the nozzle 22 being provided in a water stream at the discharge side of the drain pump 5 under static pressure lower than the static pressure of a suction port in the suction part 18.

6. 发明专利

JPH09330127A ANALYSIS SUPPORT DEVICE FOR RIVER NETWORK FLOW AND OPERATION SUPPORT DEVICE FOR DRAINAGE MACHINE FIELD EQUIPPED WITH THE SAME 失效
公开(公告)号：JPH09330127A
公开(公告)日：1997-12-22
申请号：JP14889796
申请日：1996-06-11
申请人： HITACHI LTD
发明人： TANAKA TEIJI , SASAKI NAOYA , MUKAI HIROSHI , KOBAYASHI HIROHARU , YOSHIKAWA YOSHIHIKO , MANABE AKIRA
IPC分类号： E03B5/00 , E02B1/00 , E03F1/00 , G05D7/06 , G06F17/00 , G06F19/00 , G06Q10/00 , G06Q50/00 , G06Q50/10
摘要： PROBLEM TO BE SOLVED: To make it possible to analyze and evaluate the danger of submer gence in a drainage machine field and an intermediate or small river area in advance even if it rains much by allocating different arithmetic programs to at least two arithmetic units and placing them in operation. SOLUTION: An input device A12 periodically input waterway information on the inflow, water level, etc., at a river or waterway entrance, the operation state of a pump, etc., through a network 19. An analyzing device A1 in a multiple processor A1 decides whether each waterway is an open or closed waterway from the waterway water level, and divides the river network into blocks according to the waterway state decision result and waterway constitution element data. Then individual arithmetic units A14 are assigned to the respective blocks, different arithmetic programs are allocated, and the flow states of waterways are analyzed by using a continuous expression and a motion equation. The analysis result and waterway information of the respective blocks and the operation state of the pump are edited by an output device A13 and outputted on a CRT 20, a printer 17, or a plotter 18.

7. 发明专利

JPH0893693A TURBO-FLUID MACHINE 失效
公开(公告)号：JPH0893693A
公开(公告)日：1996-04-09
申请号：JP22477394
申请日：1994-09-20
申请人： HITACHI LTD , HITACHI TECHNO ENG
发明人： UEYAMA TOSHIHARU , TAKAGI YUKISHI , TAKANO YASUSHI , IWASE KOJI , IDA DOSHU , TANAKA TEIJI , NAGAOKA YOSHIHIRO , YOSHIDA TETSUYA
IPC分类号： F04D29/44 , F04D29/66
摘要： PURPOSE: To reduce radiation sounds from a body surface, piping, cover or the like by constructing integrally a diffuser side plate, diffuser blade and backboard blade, providing separately a stage and transmitting a vibrational force from the diffuser blade and backboard blade through a fitting part of the diffuser side plate and stage to the stage without transmitting the vibrational force directly to the stage. CONSTITUTION: A casing 5 receives a blade 4a of a diffuser 4, side plates 4b and back board blade 2 of both sides thereof made integrally and an annular stage 3 separately attached, so that the fitting part of the casing and stage through which a vibrational force is transmitted is reduced to a portion of the diffuser side plate 4b and stage 3. While the vibrating force of fluid discharged from a blade 7a of an impeller 7 to act on the blade 4a of the diffuser 4 is transmitted from the diffuser side plate 4b to the stage 3, the vibrational force is damped at the fitting part. Thus, the fluid performance is not little affected and radiation sounds from the body surface, piping, coupling cover or the like of a turbo-fluid machine body can be economically effectively reduced.

8. 发明专利

JPH06288398A CENTRIFUGAL COMPRESSOR 失效
公开(公告)号：JPH06288398A
公开(公告)日：1994-10-11
申请号：JP8035293
申请日：1993-04-07
申请人： HITACHI LTD
发明人： NISHIDA HIDEO , KOBAYASHI HIROMI , MIURA HARUO , TANAKA TEIJI
IPC分类号： F04D29/44 , F04D29/66
摘要： PURPOSE:To improve performance and reduce noise by constituting guide vanes from two kinds of guide vanes equal in front edge radius and different in length, arranging the short guide vane between the adjacent long guide vanes, and setting the total number of guide vanes larger than the vane number of an impeller. CONSTITUTION:A pair of diffusers 4 and a diffuser with vanes consisting of too kinds of guide vanes 5, 6 different in length arranged between them in circular wing line form are set in the radial outside of a centrifugal impeller 2 fixed to a rotating shaft. One guide vane 5 is set longer than the other guide vane 6, and the total number of both the guide vanes 5, 6 is set larger than the vane number of the impeller 2. Both the guide vanes 5, 6 are alternately arranged in the circumferential direction, and the respective front edge radiuses ra are set equal to each other. Further, among two passages between both the adjacent guide vanes 5, 6, a throat 10 is formed on only one. Thus, a high performance centrifugal compressor having a wide operation range and low noise can be provided.

9. 发明专利

JPH03138498A SUCTION CASING 失效
公开(公告)号：JPH03138498A
公开(公告)日：1991-06-12
申请号：JP27586889
申请日：1989-10-25
申请人： HITACHI LTD
发明人： NAKADA ERIKO , TANAKA TEIJI
IPC分类号： F04D29/44
摘要： PURPOSE:To secure the uniform flow, prevent the exfoliation of stream and secure the superior performance by arranging a rectifying plate by positioning the front edge in the connection part between a suction pipe and a suction flow passage from a suction port, in a suction casing. CONSTITUTION:A cylindrical suction pipe 2a is installed on a circular suction casing 2 surrounding a rotary shaft 1, and the suction casing 2 is formed in axially symmetrical form a suction pipe axis. Further, a vane wheel 3 fixed on the rotary shaft 1 is arranged in a suction flow passage 5. In this case, inside the suction casing 2, a plate-shaped rectifying plate 4 is fixed in the radial direction on the suction casing inner wall surface 2b. Further, the front edge of the rectifying plate 4 is arranged so as to be set between the suction pipe 2a and the connection part to the suction pipe 2a and a suction port 2c from the suction flow passage 5. Fluid flows uniformly on the both sides of the rectifying plate 4, and flows uniformly in the peripheral direction in the sucyion flow passage 5. Accordingly, the superior performance can be secured with the lightweight and inexpensive constitution.

10. 发明专利

JPH0326898A CENTRIFUGAL PUMP 失效
公开(公告)号：JPH0326898A
公开(公告)日：1991-02-05
申请号：JP15678289
申请日：1989-06-21
申请人： HITACHI LTD
发明人： TANAKA TEIJI , TAKAGI TAKEO , YOSHIDA MASAO , YANAGISAWA SEIJI
IPC分类号： F04D29/16 , F04D29/22
摘要： PURPOSE:To prevent increase of leak even if size of clearance in a seal section is changed by providing an opening in the axial direction on the inlet side of a cylindrical section of an impeller side plate at the circumferential position and a wearing ring on the inner diameter side of the cylindrical section of the impeller side plate. CONSTITUTION:Since pressure loss occurs at the inlet of a seal section when ordinary clearance is provided in the seal section, pressure on the inner diameter side of cylindrical sections 2a, 2b of an impeller side plate becomes lower than that on the outer diameter side, and a flow which passes through openings 5a, 5b flows toward inside. This flow becomes resistance against a leak flow 8 which passes through the seal section, thereby decreasing leak flow rate. On the other hand, when clearance in the seal section is expanded due to wear, reduction of pressure from the outer diameter of the cylindrical sections 2a, 2b of the impeller side plate to the inner diameter decreases. Consequently, centrifugal force which acts on fluid in the openings becomes predominant due to the rotation of an impeller 2, and the flow which passes through the openings 5a, 5b flows toward outside. That is, a portion of the leak flow 8 becomes a bypass flow 9, thereby reducing the amount which flows toward the suction side of the impeller.

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