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21. 发明专利

JPS56104165A MULTISTAGE HYDRAULIC MACHINE 失效
公开(公告)号：JPS56104165A
公开(公告)日：1981-08-19
申请号：JP463480
申请日：1980-01-21
申请人： HITACHI LTD
发明人： HISHIDA YASUO , INOUE HISAO
IPC分类号： F03B3/10 , F03B3/18
摘要： PURPOSE:To surely open and close the plural-stage movable guide vanes of a hydraulic machine synchronously with each other, by coupling the guide vane stems of all stages to each other to provide a single servomotor operation mechanism. CONSTITUTION:The stems of the first-stage guide vane 7 and the second-stage guide vane 8 are coupled with each other by a connecting member 17. Although the connecting member 17 extends through a return vane flow passage 5, the member 17 is not located in the space of the passage 5 and neither reduces the cross section of the flow passage 5 nor disturbs the flow becuase the connecting member 17 is inserted with an appropriate clearance between openings 5B provided in a return vane 5A. For that reason, the guide vanes in all the stages can be simply and surely opened and closed synchronously with each other by a single servomotor through a lever 9 etc.

22. 发明专利

JPS55148974A COOLING APPARATUS FOR ROTATING HYDRAULIC MACHINE 失效
公开(公告)号：JPS55148974A
公开(公告)日：1980-11-19
申请号：JP5704479
申请日：1979-05-11
申请人： HITACHI LTD
发明人： NAKANO GONROU , INOUE HISAO , IWAKI FUMINORI , BANDAI TOSHIHIKO
IPC分类号： F03B11/00
摘要： PURPOSE:To prevent an excessive cooling of the lubricating oil for metal and also prevent a seizing accident, by providing a water supply pipe for a water seal packing of the main shaft with a valve to prevent a back flow to the metal cooler when the main shaft is stopped. CONSTITUTION:A water supply line 16 feeding water via a strainer 17 to a water seal packing 15 for the main shaft of a water turbine 1 branched off from a water supply line 8, is provided with a valve 18. The valve 18 is normally opened when the main shaft is driven, and is automatically closed when it is stopped. Therefore, when the main shaft is closed, a back flow of water passing from a suction line 2 to a discharge line 3 and each coolers 9-12 is stopped by a valve 6, and cut off also by a valve 18, thereby preventing an excessive cooling of the lubricating oil.

23. 发明专利

JPS53122033A GUIDE VANE SEAL SYSTEM 失效
公开(公告)号：JPS53122033A
公开(公告)日：1978-10-25
申请号：JP3525677
申请日：1977-03-31
申请人： HITACHI LTD
发明人： SATOU ASAMI , TAKAGI NOBUSUKE , INOUE HISAO
IPC分类号： F03B3/18 , F03B11/00
摘要： PURPOSE:To enhance seal effects by measures of installing free surfaces on both sides of seal rubber in order to simplify rubber reshaping for securing larger fastening space, in a contrivance to seal guide vane upper and lower gap parts with rubber.

24. 发明专利

JPS52148743A CONTACT DETECTING METHOD FOR RUNNER 失效
公开(公告)号：JPS52148743A
公开(公告)日：1977-12-10
申请号：JP6556776
申请日：1976-06-07
申请人： HITACHI LTD
发明人： OKADA MASAYASU , NASU KOUTA , INOUE HISAO , YAMAMOTO AKIHIKO
IPC分类号： F03B3/12 , F03B11/00
摘要： PURPOSE:To positively detect contact between a runner and a runner cover by a simple structure, by detecting the fluid pulsation or fluid press. amplitude value of a seal gap part of the runner through a detector connected with a cooling water feed system to the seal gap.

25. 发明专利

JPS52135942A OPERATION OF HYDRAULIC MACHINE 失效
公开(公告)号：JPS52135942A
公开(公告)日：1977-11-14
申请号：JP5253576
申请日：1976-05-08
申请人： HITACHI LTD
发明人： OGIWARA KENJIYUU , INOUE HISAO , KUWABARA HISAO , KOSEKI TOSHIHIKO
IPC分类号： F03B15/18 , F03B15/04 , F03B15/14
摘要： PURPOSE:To provide a control procedure for cut-out operation of a hydraulic machine through which heat expansion of the runner may be prevented during its racing or operation in coffered environment.

26. 发明专利

JPS63170566A EDGE SEAL 失效
公开(公告)号：JPS63170566A
公开(公告)日：1988-07-14
申请号：JP42087
申请日：1987-01-07
申请人： HITACHI LTD
发明人： ARAI KATSUTOSHI , AIZAWA KOJI , SEKIDO KENJI , INOUE HISAO , NEMOTO TOMIO
IPC分类号： F03B11/00
摘要： PURPOSE:To keep constant pressure at the sliding surface of a seal ring and ensure stable sealing performance by forming a fresh water supply chamber with the flange edge of the rotation main spindle of a water-turbine and the like and a seal ring, and communicating said chamber with a sealed chamber. CONSTITUTION:A circumferential groove is provided on the sliding surface of a seal ring 6 and forms a fresh water supply chamber 9 together with the sliding surface of a flange 2. And when this water supply chamber 9 is communicating with a sealed chamber 12 via a hole 13, fresh water fed from a water supply pipe 10 tends to flow in an arrow mark direction. The seal ring 6 is exposed to an arrow-marked downward load due to sealing pressure Pa and an arrow-marked upward load due to water supply pressure Pb. As the water supply chamber 9 is communicating with the sealed chamber 12, however, the suitable selection of D2 dimensions enables the water supply pressure Pb to balance approximately with the sealing pressure Pa. Consequently, sliding surface pressure working on the seal ring 6 is extremely low and can always be kept constant. Also, even if fresh water supply is interrupted, the sliding surface pressure of the seal ring 6 is free from an abnormal rise due to the sealing pressure Pa.

27. 发明专利

JPS63159670A VALVE SUPPORTING STRUCTURE FOR VALVE WATER TURBINE 失效
公开(公告)号：JPS63159670A
公开(公告)日：1988-07-02
申请号：JP30373486
申请日：1986-12-22
申请人： HITACHI LTD
发明人： YANAGIDA ISAO , KAWAI JUICHIRO , YOSHIKAWA TSUGIO , INOUE HISAO
IPC分类号： F03B3/04
摘要： PURPOSE:To enable a valve to adjust its center axis height, by providing a level adjusting mechanism, which contains a cylinder and a piston, to be arranged in either one end part of a valve supporter which supports the valve of a valve water turbine to the bottom surface of a conduit. CONSTITUTION:In the case of a valve water turbine which houses a generator in the inside of a valve, containing a valve stator 2, to be driven by rotating the water turbine by a flow of water in a conduit 5, a flange 6-B is formed in the side end part of a conduit of a valve supporter 6 which supports the valve to a bottom surface of the conduit 5, and the flange 6-B forms in its peripheral surface a ring-shaped protrusive part (piston part) which exists extending along the peripheral surface. While a conduit side flange 11 is integrally formed with an anchor plate 12 provided to be embedded to the bottom surface of the conduit 5, and the flange 11 forms a ring-shaped recessed part (cylinderpart)mutually fitted to the above described protrusive part. And the valve enables its center axis height to be adjusted through the valve supporter 6 by supplying fluid pressure to a pressure fluid chamber 15 partitioned between the protrusive and recessed parts.

28. 发明专利

JPS61258972A VALVE TYPE CYLINDRICAL WATER TURBINE EQUIPMENT 失效
公开(公告)号：JPS61258972A
公开(公告)日：1986-11-17
申请号：JP10022985
申请日：1985-05-10
申请人： HITACHI LTD
发明人： OSHIMA KATSUHIRO , INOUE HISAO
IPC分类号： F03B3/04 , F03B11/00
摘要： PURPOSE:To obtain the supporting structure of a valve type water turbine having a high reliability due to a uniform load transmission by arranging a steel reinforcing beam perpendicular to the shaft of a valve type cylindrical water turbine in the interior of a concrete beam which is placed so as to be adjacent to a stay in the upper part of a concrete wall. CONSTITUTION:In this kind of valve type water turbine, the greater part of load acting on the valve type water turbine body 2 is transmitted to a surrounding concrete structure 7 by a stay 6, and therefore a steel beam 16 of I section which is directly connected to a stay vane being in the upper vertical direction at the upper load supporting part of the concrete structure 7 lying between machinery carrying-in ports 9 and 10 and has a length reaching to the side walls of the concrete structure 7 is embedded. The load at the center of the steel beam 16 is transmitted by a composite member of concrete and beam, and the share load of the beam is transmitted to the side wall concrete at the both ends of the beam, fulfilling the function as a reinforcement for concrete.

29. 发明专利

JPS57137513A CONSTRUCTION FOR POWER STATION 失效
公开(公告)号：JPS57137513A
公开(公告)日：1982-08-25
申请号：JP2383481
申请日：1981-02-19
申请人： TOHOKU ELECTRIC POWER CO , HITACHI LTD , HITACHI SHIPBUILDING ENG CO
发明人： YOSHIDA HIROSHI , ASANO HIROSHI , INOUE HISAO , SATOU JIYOUSUKE , MAKIHATA TOSHIAKI , TAKAKURA HIROO
IPC分类号： E02B9/00 , F03B13/08
摘要： PURPOSE:To decrease an excavating amount and to reduce a construction amount, by a method wherein an intake of a headrace constructed on a diversion channel bed of a weir is open to the upper side of a gate, a diversion channel is open to the down stream side of the gate, and a water turbine type generator is installed in the head race. CONSTITUTION:An excavation is performed below a diversion channel 12 of a dam 10 to form a headrace 14. An intake 15 of the headrace 14 is open to the diversion channel 12 at the upstream side of a gate 13, and an outlet 16 is open to the downstream side. A water turbine type generator 17 is installed in the headrace 14. Additionally, an inspection gallery 18, running from a pier 11 to a location, where the water turbine type generator 17 is installed, is constructed in the dam 10.

30. 发明专利

JPS5799273A ELEVATOR TYPE POWER GENERATOR 失效
公开(公告)号：JPS5799273A
公开(公告)日：1982-06-19
申请号：JP17506280
申请日：1980-12-10
申请人： TOHOKU ELECTRIC POWER CO , HITACHI LTD , HITACHI SHIPBUILDING ENG CO
发明人： YOSHIDA HIROSHI , ASANO HIROSHI , INOUE HISAO , SATOU JIYOUSUKE , MAKIHATA TOSHIAKI , TAKAKURA HIROO
IPC分类号： F03B3/04 , F03B3/06 , F03B17/06
摘要： PURPOSE:To operate a water wheel type generator under a condition not having variations in hydraulic presure, etc., by performing discharge due to an overflow while providing an overflow gate on the main gate and blocking the main gate. CONSTITUTION:In order to let an overflow gate 9 stand up to block water and to allow an overflow from a state where a water wheel type generator 1 is in operation, it is desirable to bring down the overflow gate 9 either entirely or halfway. Even in this overflow state, the water wheel type generator 6 is operated at a prescribed position. When repairs and checks on the generator 6 and both gates 5, 9 are performed, a preliminary gate is firstly thrown down into a door groove 10 for a flashboard. Then the generator 6 as well as the main gate 5 may be pulled up.

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