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1. 发明专利

JP2000266027A ANCHOR BOLT 失效
公开(公告)号：JP2000266027A
公开(公告)日：2000-09-26
申请号：JP7315099
申请日：1999-03-18
申请人： HITACHI LTD , HITACHI TECHNO ENG
发明人： AMANO KAZUO , UEYAMA TOSHIHARU , NAGAI YUJI , SAKURAI SHINSUKE , SUGANO SATOSHI , HAYASHI MAKOTO
IPC分类号： E04B1/41 , F16B33/06 , F16B35/00 , F16B35/04
摘要： PROBLEM TO BE SOLVED: To provide the superior corrosion resistance even under a corrosive environment though the different kinds of metals are bonded, by exposing a bolt part made of stainless steel superior in corrosion resistance, on the ground which is the corrosive environment and needs the corrosion resistance. SOLUTION: A bolt member exposed to the ground 8 for fixing a mechanical structural body, is made of SUS 304 superior in corrosion resistance, which does not cause the problem on corrision. In a case when the water intrudes insides of the concrete 7 from a boundary part of the concrete 7 and a bolt member 3, the galvanic corrision is inhibited on a rod member 2 and the bolt member 3 by the action of an applied zinc-contained butylene rubber sheet 5, and the cathode corrision control is applied to a heat-affected zone of the bolt member 3. Accordingly the anchor bolt is not damaged by the corrision even when it is used under the corrosive environment, and the fastening of the mechanical structural body of high reliability can be realized for a long period.

2. 发明专利

JP2000145697A INEXPENSIVE, HIGH RELIABLE STRUCTURE OF PUMP 失效
公开(公告)号：JP2000145697A
公开(公告)日：2000-05-26
申请号：JP31866198
申请日：1998-11-10
申请人： HITACHI LTD , HITACHI TECHNO ENG
发明人： AMANO KAZUO , UEYAMA TOSHIHARU , SUGANO SATOSHI , NAGAI YUJI , SAKURAI SHINSUKE , HAYASHI MAKOTO
IPC分类号： F04D1/08 , F04D29/42
摘要： PROBLEM TO BE SOLVED: To dispense with processes of a precise finishing for stepping an outer casing inside diameter face and a specific stage used for stepping part of the outer casing inside diameter face by providing a member connecting the outer casing to the inner casing in an annular space between the outer casing and the inner casing. SOLUTION: An outer casing 1 of a structure having no stage part with a suction port 11 and discharge port 10 formed thereon, and an inner casing 3 constituted of several steps of same-shaped stages 2 combined together in its inside are arranged. A rotary shaft 4, an impeller 5, and a diffuser 20 are attached to the inside of the inner casing 3, and a member 9 connecting the outer casing 1 to the inner casing 3 is provided in an annular space 6 between the outer casing and the inner casing 3. The member 9 can seal and divide the two chambers of a water bleeding chamber and a high-pressure discharge chamber 8.

3. 发明专利

JP2003322098A Uniaxial multistage pump 审中-公开
标题翻译：单相多泵
公开(公告)号：JP2003322098A
公开(公告)日：2003-11-14
申请号：JP2002093560
申请日：2002-03-29
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： MURAI YOICHI , INOUE TOMOAKI , SAKAMOTO WAICHI , UEYAMA TOSHIHARU , NAGAI YUJI
IPC分类号： F04D29/02 , F04D29/04 , F04D29/046 , F04D29/44 , F16C17/10 , F16C33/20
摘要： PROBLEM TO BE SOLVED: To provide a pump reduced in size, eliminating auxiliary machines such as an oil pump for supplying lubricating oil, an oil pipe and a cooling device for lubricating oil, etc., and making the contact of a shaft with a bearing difficult, even if lubricating the pump with handled fluid (water). SOLUTION: Journal bearings 51 and 61 provided with sealing functions are provided on at least two or more portions between a core plate side cylinder part 42 of impellers 4 of an uniaxial multistage pump having the plurality of impellers 4 arranged on multistage and a diffuser member 5 or between an axial direction part 43 of a side plate and a stage 6. Thrust bearings 17a and 17b are provided on at least one or more portions between the core plate side disc part 42 of the impellers 4 and the diffuser member 5. In the journal bearings 51 and 61 or the thrust bearings 17a and 17b, positive pressure is generated over the entire of the peripheral direction. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：为了提供减小的泵，消除诸如用于供给润滑油的油泵等辅助机器，油管和用于润滑油的冷却装置等，并使轴的接触即使用处理液体（水）润滑泵，轴承也很困难。解决方案：具有密封功能的轴承51和61在具有多级布置的多个叶轮4的单轴多级泵的叶轮4的芯板侧圆筒部42之间的至少两个以上部分上设置，扩散器构件5或侧板的轴向部分43和台架6之间。推力轴承17a和17b设置在叶轮4的芯板侧盘部分42和扩散器构件5之间的至少一个或多个部分上在轴颈轴承51和61或推力轴承17a和17b中，在整个圆周方向产生正压力。版权所有（C）2004，JPO

4. 发明专利

JP2002188637A BEARING DEVICE, AND PUMP DEVICE AND PUMP FACILITY 失效
公开(公告)号：JP2002188637A
公开(公告)日：2002-07-05
申请号：JP2000388653
申请日：2000-12-21
申请人： HITACHI LTD
发明人： NAKANO MASAAKI , INOUE TOMOAKI , AIZAWA KOJI , UEYAMA TOSHIHARU , NAGAI YUJI
IPC分类号： F16C33/10 , F16C17/02 , F16C17/06 , F16N7/38
摘要： PROBLEM TO BE SOLVED: To provide a bearing device capable of saving costs, an installation space, energy and resource, securing the sufficient oiling amount from low-rev thrust to high-rev thrust and over an extended time, and obtaining high reliability. SOLUTION: An oiler 24 supplying lubricant 11 to a journal bearing 2 contains a disk 19 fixed on a rotary shaft, an oil case 20 forming an arc-shaped shallow oil chamber 21 opposing the disk 19, an oil suction passage 27 for leading the lubricant 11, and an oil supply passage 26 leading the lubricant 11 to the journal bearing 2. The oil case 20 has heat resistance, and consists of a synthetic resin having self-lubricity.

5. 发明专利

JPH10311298A DIFFUSER OF PUMP 失效
公开(公告)号：JPH10311298A
公开(公告)日：1998-11-24
申请号：JP12191897
申请日：1997-05-13
申请人： HITACHI LTD
发明人： NAKAMURA YUJI , NAGAI YUJI
IPC分类号： F04D1/06 , F04D29/44
摘要： PROBLEM TO BE SOLVED: To eliminate an unstable characteristic from a pump head curve by forming a structure of a straightening plate arranged between diffuser blades as a fine mesh structure in the vicinity of a diffuser blade wall, and forming a part where a vortex flow and a secondary flow by separation of a flow of a diffuser are not generated, as a rough mesh structure. SOLUTION: A vortex flow by separation is generated on the wall surface side of diffuser blades 1, and continues backward, and a flow in a diffuser is disturbed. In order to prevent this, a straightening plate 2 is arranged between the blades in the tip vicinity of the diffuser blades 1. The straightening plate 2 is formed as a mesh structure, and is formed as a fine mesh structure 2a in this range since a vortex flow is generated on the wall surface side of the diffuser blades 1, and is formed as a rough mesh structure 2b in a nonsuch range. The respective mesh structures are formed as a structure which does not reduce efficiency of an existing pump and hardly causes a loss. Therefore, a flow flowing out of an impeller is straightened and stabilized, and a speed head being a role of the diffuser can be effectively converted into a pressure head.

6. 发明专利

JP2002372050A Method of manufacturing bearing, and bearing 有权
标题翻译：制造轴承和轴承的方法
公开(公告)号：JP2002372050A
公开(公告)日：2002-12-26
申请号：JP2001181114
申请日：2001-06-15
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NAGAI YUJI , UEYAMA TOSHIHARU , NAKANO MASAAKI , INOUE TOMOAKI
IPC分类号： F16C33/20
摘要： PROBLEM TO BE SOLVED: To provide a method of manufacturing a bearing capable of stably bonding a back metal to a resin sliding member, and causing no separation in operation, and to provide the bearing.
SOLUTION: In this method of manufacturing the bearing wherein the resin sliding member 5 is bonded to a sliding side-surface of the back metal 2 of a journal bearing 1, a metallic filter 4 having a matted outer peripheral surface is mounted at an inner peripheral side of the back metal 2 through a wax material 3, and a uniform pressurizing device 11 positioned on an inner periphery of a high-frequency heating coil 9 and capable of pressing the same with uniform distribution in the circumferential direction, is mounted at an inner peripheral side of the metallic filter 4. The method comprises a first bonding process for pressing and bonding the metallic filter 4 to the back metal 2 by the uniform pressurizing device 11 while heating the same by the high-frequency heating coil 9 in a state of rotating the whole, and a second bonding process for placing the resin sliding member 5 at the inner peripheral side of the metallic filter 4 after the temperature up, pressing the resin sliding member 5 by the uniform pressurizing device 11 for melting the resin sliding member 5 on the inner peripheral surface of the metallic filter 4, and impregnating a porous part of the metallic filter 4 wit the resin sliding member 5.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：提供一种制造能够将背面金属稳定地接合到树脂滑动构件上并且不会在操作中分离的轴承的制造方法，并且提供轴承。解决方案：在该轴承制造方法中，树脂滑动部件5与轴颈轴承1的背面金属2的滑动侧面接合，具有无光泽的外周面的金属过滤器4安装在内周背面金属2的侧面通过蜡材料3，以及位于高频加热线圈9的内周上并且能够沿圆周方向均匀分布的均匀的加压装置11安装在内部金属过滤器4的外周侧。该方法包括第一接合工艺，其通过均匀加压装置11将金属过滤器4按压并接合到背面金属2，同时通过高频加热线圈9以旋转整体，以及第二接合工序，用于在升温之后将树脂滑动部件5放置在金属过滤器4的内周侧，按压树脂滑动件通过用于熔化金属过滤器4的内周面上的树脂滑动构件5的均匀加压装置11和用树脂滑动构件5浸渍金属过滤器4的多孔部分。

7. 发明专利

JPH11324987A CENTRIFUGAL TURBO MACHINE 失效
公开(公告)号：JPH11324987A
公开(公告)日：1999-11-26
申请号：JP13839298
申请日：1998-05-20
申请人： HITACHI LTD
发明人： ISHIMARU HIROTOSHI , TANAKA TEIJI , NISHI RYUICHI , UEYAMA TOSHIHARU , NAGAI YUJI
IPC分类号： F04D1/08 , F04D29/44
摘要： PROBLEM TO BE SOLVED: To miniaturize a centrifugal turbo machine while sufficiently lowering the fluid loss. SOLUTION: A side plate 12 is provided with a half-open passage 15 for turning the flow from the nearly centrifugal direction to the nearly axial direction and while leading the fluid to a return flow passage in a part facing to an enlarged passage 14 pinched between a diffuser vane 13a and the adjacent diffuser vane 13b at a part close to the outlet side than a rear edge 13a10 of a negative pressure surface 13a1 of the diffuser vane 13a. Each diffuser vane 13a, 13b, 13c... is formed so that thickness of a part 13a20 , 13b20 , 13c20 ... of parts facing to the half-open passage 15 among pressure surfaces 13a2 , 13b2 , 13c2 ... are gradually reduced like a taper-shape toward the downstream in the axial direction.

8. 发明专利

JP2003106298A METHOD AND SYSTEM FOR DESIGNING TURBO TYPE FLUID MACHINERY 审中-公开
公开(公告)号：JP2003106298A
公开(公告)日：2003-04-09
申请号：JP2001301008
申请日：2001-09-28
申请人： HITACHI LTD , RI GUN , TSUKAMOTO HIROSHI
发明人： RI GUN , TSUKAMOTO HIROSHI , OKAMURA TOMOYOSHI , NAGAI YUJI
IPC分类号： F04D1/08 , F04D29/44
摘要： PROBLEM TO BE SOLVED: To reliably design a turbo type fluid machinery of high performance in a method for designing the turbo type fluid machinery. SOLUTION: In the method for designing the turbo type fluid machinery having an impeller to suck the fluid from a center and discharge it in the outer circumferential direction by using a computer, an optimum design of a member to constitute a flow field of the fluid is performed by using a genetic algorithm in which an individual forming a candidate solution with a plurality of design variables assembled therewith is expressed by a gene for outbreak, and the genetic operation is repeated to the individual group to search for a solution thereof.

9. 发明专利

JPH10169598A CENTRIFUGAL FLUID MACHINERY 失效
公开(公告)号：JPH10169598A
公开(公告)日：1998-06-23
申请号：JP33335296
申请日：1996-12-13
申请人： HITACHI LTD
发明人： NAGAI YUJI , UEYAMA TOSHIHARU
IPC分类号： F04D1/08 , F04D29/44
摘要： PROBLEM TO BE SOLVED: To improve unstable characteristics caused by reduction of all pump head in a low flow rate region by forming a blade outlet diameter of a spurn water blade smaller than a stage push outer diameter arranged on a sliding part between a stage and a main shaft. SOLUTION: In centrifugal fluid machinery, the entrifugal force by turning at an inlet part of an impeller 3 generates flow from a core plate side in a radial direction, and reverse flow is generated in the vicinity of an inlet side plate of the impeller 3. When the reverse flow is invaded into a return flow passage 7, pre-turning component is enlarged in an equation of a theoretical pump head, and thereby, a unstable characteristic of a pump head characteristic is generated as well as reducing the all pump head. The outlet diameter ϕD of a spurn water blade 6 is formed smaller than an outer diameter ϕD' of a stage bush 8. When it is suppressed that flow in a return flow passage 7 is influenced by reverse flow of a low flow rate region, reduction of the all pump head is eliminated, and the stable characteristic is obtained.

10. 发明专利

JPH08121394A DIFFUSER PUMP 失效
公开(公告)号：JPH08121394A
公开(公告)日：1996-05-14
申请号：JP25497994
申请日：1994-10-20
申请人： HITACHI LTD
发明人： NAGAI YUJI , OKAMURA TOMOYOSHI
IPC分类号： F04D29/44 , F04B11/00
摘要： PURPOSE: To reduce the occurrence of a pressure pulsation by a method wherein a plurality of holes are formed in the side wall surface of a flow passage between the vanes of a diffuser and intercommunicated through a bypass. CONSTITUTION: A flow flowing in from a pump suction casing is boosted through rotation of an impeller and discharged to a diffuser. Holes 8 are formed in a side wall 5 surface between diffuser blades and intercommunicated through a groove 9 (a bypass pipe). Thus, even when a flow flowing out from an impeller is interfered at the front edge of the diffuser and pressure pulsation occurs, pulsations between which a phase is displaced are offset with each other through propagation of it through the groove 9 (a bypass pipe) from the holes 8 and a pressure pulsation in a diffuser flow passage is reduced. Especially, when a hole on the diffuser blade inlet negative pressure surface (a recessed surface) side where a pressure pulsation is highest is communicated with a hole in the same position between different blades between which a phase is displaced, a pressure pulsation is sharply reduced.

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