专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

21. 发明专利

JPS5356445A STARTING PROCESS OF WATER MILL 失效
公开(公告)号：JPS5356445A
公开(公告)日：1978-05-22
申请号：JP13050576
申请日：1976-11-01
申请人： HITACHI LTD
发明人： OGIWARA MASASHIGE
IPC分类号： F03B15/04 , F03B3/10
摘要： PURPOSE:Starting process of a water mill schemed out for stable starting by means that opened guide vanes make a runner rotate to come up to be close to synchronous rotational velocity that is predetermined, and then changeover activation of a starting circuit makes acceleration of the runner until it comes up to the synchronous velocity to be arranged in synchronous parallelism.

22. 发明专利

JPS5343149A SEALING METHOD OF GUIDE VANE OF FLUID MACHINE 失效
公开(公告)号：JPS5343149A
公开(公告)日：1978-04-19
申请号：JP11723076
申请日：1976-10-01
申请人： HITACHI LTD
发明人： OGIWARA MASASHIGE , SATOU ASAMI
IPC分类号： F03B3/18 , F16J15/16
摘要： PURPOSE:To seal water leakage effectively from guide vane side cap, by preparing some difference in fastening of seal packing at the fixed part faced to upper and lower end of guide vane, and providing packing fastening so as to follow the transformation of the fixed part.

23. 发明专利

JPH01244170A VARIABLE SPEED POWER PLANT 失效
公开(公告)号：JPH01244170A
公开(公告)日：1989-09-28
申请号：JP6956688
申请日：1988-03-25
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： KUWABARA HISAO , OGIWARA MASASHIGE , NAKAGAWA HIROTO , ONO YASUTERU
IPC分类号： F03B15/08 , F03B15/04
摘要： PURPOSE:To avoid any abnormal resonance by installing a charging line capable of supplying air at need from a draft pipe of a variable speed power plant and a runner chamber or the more upstream than it. CONSTITUTION:An induction machine 1 is rotatively driven by a water turbine 2 directly connected to the rotator, while an AC existing current regulated to the specified phase according to rotational speed of the induction machine 1 by a secondary exciting controller 3 provided with a frequency changer is fed to secondary winding 1b of the induction machine 1. A charging command device 23 judges no whether charging is necessary or not automatically as monitoring actual rotational speed N and guide vane opening Y, and if it is judged to be necessary, it opens an automatic feed valve 24. Thus, air is fed to a feed pipe 22 installed in a draft pipe from a charging line leading to a charging source 25.

24. 发明专利

JPS61126379A Starting of pump 失效
标题翻译：泵起动
公开(公告)号：JPS61126379A
公开(公告)日：1986-06-13
申请号：JP24802084
申请日：1984-11-26
申请人： Hitachi Ltd
发明人： OGIWARA MASASHIGE
IPC分类号： F04D15/00 , F03B15/00 , F03B15/04
CPC分类号： F03B15/005 , Y02E10/226
摘要： PURPOSE:To prevent vibration by starting operation after setting the set value of the shut-off pressure of a discharge part which is obtained by the revolution of a runner blow the hydrostatic pressure on the downstream side of a guide vane. CONSTITUTION:A differential pressure gauge 7 detects the pressure difference between the shut-off pressure of a pump water wheel and the pressure on the downstream side of a guide vane and sets the shut-off pressure so as to be below the hydrostatic pressure on the downstream side of the guide vane. Therefore, the self-excited vibration of the guide vane can be prevented by detecting the differential pressure DELTAP between the hydrostatic pressure and the shut-off pressure by the differential pressure gauge 7 and opening the guide vane. The value is approximately shut-off pressure
摘要翻译：目的：为了防止在通过转子旋转获得的排出部的切断压力的设定值在引导叶片的下游侧吹出静水压力之后，通过启动操作来防止振动。构成：差压计7检测泵水轮的切断压力与导向叶片的下游侧的压力之间的压力差，并将切断压力设定为低于水轮机的静水压力导叶的下游侧。因此，可以通过差压计7检测静水压力和截止压力之间的压差DELTAP并打开导向叶片来防止引导叶片的自激振动。该值近似关闭压力<=静水压力×0.98-0.90。

25. 发明专利

JPS5840660B2 失效
公开(公告)号：JPS5840660B2
公开(公告)日：1983-09-07
申请号：JP7221176
申请日：1976-06-21
申请人： HITACHI LTD
发明人： ICHINOSE MASARU , OGIWARA MASASHIGE
IPC分类号： F04D29/16 , F03B11/00

26. 发明专利

JPS5834672B2 失效
公开(公告)号：JPS5834672B2
公开(公告)日：1983-07-28
申请号：JP8404473
申请日：1973-07-27
申请人： HITACHI LTD
发明人： OKADA MASAYASU , OGIWARA MASASHIGE
IPC分类号： F03B15/02 , F03B15/12 , F03B15/18

27. 发明专利

JPS5786575A OPERATION FOR HYDRAULIC TURBINE OR PUMP HYDRAULIC TURBINE 失效
公开(公告)号：JPS5786575A
公开(公告)日：1982-05-29
申请号：JP16195080
申请日：1980-11-19
申请人： HITACHI LTD
发明人： OGIWARA MASASHIGE , OSANAI TOORU
IPC分类号： F03B11/00 , F03B15/04
摘要： PURPOSE:To eliminate unnecessary interruption of a main engine by detecting the time when a pressure around a runner is dropped to the vicinity of a pressure of drafted water and energizing a main engine stop circuit at the detection time. CONSTITUTION:In an operation method where a cooling water is supplied for a runner seal at idle run of a hydraulic turbine or the pump hydraulic turbine and a main engine stop circuit is provided in order to interrupt a main engine when the quantity of the cooling water is reduced for a certain period, the main engine stop circuit is energized when a pressure around a runner is reduced down to the vicinity of a pressure of drafted water. For the above energizing, there are alternative methods of directly detecting the pressure around the runner by means of a pressure detector and automatical execution after a lapse of a certain period from a full opening or closing time of an inlet valve.

28. 发明专利

JPS55142977A OPERATION OF WATER WHEEL OR PUMP WATER WHEEL 失效
公开(公告)号：JPS55142977A
公开(公告)日：1980-11-07
申请号：JP4913379
申请日：1979-04-23
申请人： HITACHI LTD
发明人： OGIWARA MASASHIGE , HACHITANI TAKEO
IPC分类号： F03B15/04
摘要： PURPOSE:To prevent anomalous vibration encountered at the time of switching by a switching method in which inlet valve is opened to retrieve a water wheel of its load while keeping a runner chamber under a condition that air is left behind when switching it from synchronous condenser operation to generating operation. CONSTITUTION:When a command for generating operation is sent forth, an exhaust valve is not opened but at a time when air is left behind in a runner chamber and an inlet valve is opened up to an opening degree at which the opening of a guide valve is permitted, the guide valve is opened, during which period the water pressure inside the casing 3 is raised by fully closing the 20DG guide vane-leak water drain valve 6 and also opening the inlet valve and thereby leak water from the guide vane is increased, so that input is directed toward an increase. However, since the runner chamber is filled with a small specific weight of a mixed fluid consisting of the air left in the runner chamber and the leak water from the guide vane and thereby the input becomes smaller, anomalous vibration encountered at the time of switching can be prevented.

29. 发明专利

JPS5444142A OPERATING METHOD OF HYDRAULIC MACHINERY 失效
公开(公告)号：JPS5444142A
公开(公告)日：1979-04-07
申请号：JP10981677
申请日：1977-09-14
申请人： HITACHI LTD
发明人： NIIKURA KAZUO , OGIWARA MASASHIGE
IPC分类号： F03B15/04 , F03B3/10 , F03B11/00
摘要： PURPOSE:To reduce the necessary driving force as well as to prevent the thermal expansion of a runner by opening a guide vane when a racing is given after water is pumped out from a runner chamber and a casing. CONSTITUTION:An inlet valve 18, a leaked water feed valve 21, and a guide vane 2 are fully opened. A leaked water drain valve 10 is opened, and compressed air is sent into a runner chamber by means of a feed valve 8 for pushing down the water surface in the runner chamber as far as an water surface 6 in a draft tube 5 in the lower part of a runner 1. Then, a racing operation is given to the runner 1 by a motor for generator or a motor for starting, and the water surface in a casing 3 is lowered to the lower level A of the guide vane. When the water level is detected by a water level detector 17 to be lowered to the lower end of the guide vane 2, the guide vane 2 is opened and the racing operation is continued. In this method, water walls are not given around the runner 1, and the thermal rising in the runner chamber as well as the driving force necessary for the racing of the runner 1 are reduced for preventing the thermal expansion of the runner 1.

30. 发明专利

JPS5346533A OPERATING METHOD OF HYDRAULIC MACHINERY 失效
公开(公告)号：JPS5346533A
公开(公告)日：1978-04-26
申请号：JP12038776
申请日：1976-10-08
申请人： HITACHI LTD
发明人： OGIWARA MASASHIGE , INOUE HISAO , NAGANUMA SUSUMU
IPC分类号： F03B15/04 , F03B11/00
摘要： PURPOSE:To prevent expansion of a runner caused by thermal rising during idling operation for a safe operation of idling by discharging water inside a casing after discharging of water inside a runner chamber in case the runner of a hydraulic mechinery is operated in idling.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式