Patents by Inventor Ryuichiro Iwano
Ryuichiro Iwano has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10243430Abstract: The invention provides a rotating electrical machine system in which an air volume of a refrigerant is increased near the center of a rotating electrical machine in the axial direction is improved. The rotating electrical machine includes a rotor and a stator, in which the stator core, laminated electromagnetic steel sheets formed by laminating a plurality of electromagnetic steel sheets in the axial direction are divided into a plurality of sets of packet cores, and between one of the packet cores of the plurality of sets and another packet core adjacent to it, there is formed a duct providing a flow channel of the stator, and in a duct situated at the center side from both ends in the axial direction among the duct, there is a portion of two packet cores facing each other across the duct, a diameter direction length of the two packet cores becoming long.Type: GrantFiled: December 16, 2016Date of Patent: March 26, 2019Assignee: Hitachi, Ltd.Inventors: Daisuke Kori, Ryuichiro Iwano, Masanori Sawahata, Kazuo Nishihama, Motonobu Iizuka, Takayuki Koyama, Kenichi Sugimoto
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Publication number: 20170187264Abstract: The invention provides a rotating electrical machine system in which an air volume of a refrigerant is increased near the center of a rotating electrical machine in the axial direction is improved. The rotating electrical machine includes a rotor and a stator, in which the stator core, laminated electromagnetic steel sheets formed by laminating a plurality of electromagnetic steel sheets in the axial direction are divided into a plurality of sets of packet cores, and between one of the packet cores of the plurality of sets and another packet core adjacent to it, there is formed a duct providing a flow channel of the stator, and in a duct situated at the center side from both ends in the axial direction among the duct, there is a portion of two packet cores facing each other across the duct, a diameter direction length of the two packet cores becoming long.Type: ApplicationFiled: December 16, 2016Publication date: June 29, 2017Inventors: Daisuke KORI, Ryuichiro IWANO, Masanori SAWAHATA, Kazuo NISHIHAMA, Motonobu IIZUKA, Takayuki KOYAMA, Kenichi SUGIMOTO
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Patent number: 8029230Abstract: A turbine exhaust system includes an exhaust hood inner casing that involves the turbine rotor; an exhaust hood outer casing that forms an exhaust hood, together with the exhaust hood inner casing; a flow guide that forms an annular diffuser flow path; and exhaust hood upper part flow guides each of which serves as means for separating annular plane upper part exhaust steam within a range including a vertical upward flow out of exhaust steam radially discharging from the flow guide into the exhaust hood, from other exhaust steam, to thereby introduce the separated steam to the condenser, wherein exhaust steam introduction-side end faces thereof are located further toward the upper side than the horizontal plane containing the central axis of the turbine rotor.Type: GrantFiled: August 31, 2009Date of Patent: October 4, 2011Assignee: Hitachi, Ltd.Inventors: Shunsuke Mizumi, Ryuichiro Iwano, Koji Ishibashi, Going Won Lee
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Patent number: 7815416Abstract: In a steam turbine having a cross-over duct for delivering steam discharged from an intermediate pressure turbine to low pressure turbines, the intermediate pressure turbine provides two outlets for discharging exhaust steam, the low pressure turbine provides two inlets, and the outlets and the inlets are arranged on the same straight line as viewed from a planar direction. One of the outlets and one of the inlets which are close to each other are connected through a cross-over duct, the other of the outlets and the other of the inlets which are far from each other are connected through another cross-over duct, and the cross-over ducts are arranged to be at two stages in the up-down direction.Type: GrantFiled: August 6, 2007Date of Patent: October 19, 2010Assignee: Hitachi, Ltd.Inventors: Shunsuke Mizumi, Ryuichiro Iwano, Koji Ishibashi, Goingwon Lee
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Patent number: 7737586Abstract: A rotating electric machine wherein sub slots serving as cooling fluid ducts in the axial direction are provided at the bottoms of the coil slots formed in the rotor, radial cooling fluid ducts are formed through the field coil of the rotor in the radial direction of the rotor and juxtaposed in the axial direction of the rotor, so as to communicate the sub slots with the air gap, and radial cooling fluid ducts are formed through the stator in the radial direction of the stator and juxtaposed in the axial direction of the rotor, corresponding in position to the radial cooling fluid ducts in the rotor, so as to communicate the inner periphery of the stator with the outer periphery of the stator.Type: GrantFiled: August 19, 2008Date of Patent: June 15, 2010Assignee: Hitachi, Ltd.Inventors: Shigeki Tounosu, Kengo Iwashige, Ryuichiro Iwano, Mitsuru Saeki, Kenichi Hattori, Kazuhiko Takahashi
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Publication number: 20090308075Abstract: A turbine exhaust system includes an exhaust hood inner casing that involves the turbine rotor; an exhaust hood outer casing that forms an exhaust hood, together with the exhaust hood inner casing; a flow guide that forms an annular diffuser flow path; and exhaust hood upper part flow guides each of which serves as means for separating annular plane upper part exhaust steam within a range including a vertical upward flow out of exhaust steam radially discharging from the flow guide into the exhaust hood, from other exhaust steam, to thereby introduce the separated steam to the condenser, wherein exhaust steam introduction-side end faces thereof are located further toward the upper side than the horizontal plane containing the central axis of the turbine rotor.Type: ApplicationFiled: August 31, 2009Publication date: December 17, 2009Applicant: HITACHI, LTD.Inventors: Shunsuke MIZUMI, Ryuichiro IWANO, Koji ISHIBASHI, Going Won LEE
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Patent number: 7604458Abstract: The guide vanes comprise two kinds of guide vanes which are alternately placed in the circumferential direction of a shroud. One kind of the guide vanes have a longer length than the other kind of the guide vanes, in the region which is close to the surface of the hub, but have substantially the same length as the other kind of the guide vanes, in the region which is close to the shroud. The leading edges of the second kind of guide vane are located further downstream in the pump axial direction than the leading edges of the first kind of guide vanes.Type: GrantFiled: July 22, 2005Date of Patent: October 20, 2009Assignee: Hitachi Plant Technologies, Ltd.Inventors: Takanori Ishii, Ryuichiro Iwano, Akira Manabe, Yasuhiro Inoue
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Patent number: 7600962Abstract: A turbine exhaust system includes an exhaust hood inner casing that involves the turbine rotor; an exhaust hood outer casing that forms an exhaust hood, together with the exhaust hood inner casing; a flow guide that forms an annular diffuser flow path; and exhaust hood upper part flow guides each of which serves as means for separating annular plane upper part exhaust steam within a range including a vertical upward flow out of exhaust steam radially discharging from the flow guide into the exhaust hood, from other exhaust steam, to thereby introduce the separated steam to the condenser, wherein exhaust steam introduction-side end faces thereof are located further toward the upper side than the horizontal plane containing the central axis of the turbine rotor.Type: GrantFiled: February 3, 2006Date of Patent: October 13, 2009Assignee: Hitachi, Ltd.Inventors: Shunsuke Mizumi, Ryuichiro Iwano, Koji Ishibashi, Going Won Lee
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Publication number: 20090058205Abstract: A rotating electric machine wherein sub slots serving as cooling fluid ducts in the axial direction are provided at the bottoms of the coil slots formed in the rotor, radial cooling fluid ducts are formed through the field coil of the rotor in the radial direction of the rotor and juxtaposed in the axial direction of the rotor, so as to communicate the sub slots with the air gap, and radial cooling fluid ducts are formed through the stator in the radial direction of the stator and juxtaposed in the axial direction of the rotor, corresponding in position to the radial cooling fluid ducts in the rotor, so as to communicate the inner periphery of the stator with the outer periphery of the stator.Type: ApplicationFiled: August 19, 2008Publication date: March 5, 2009Inventors: Shigeki Tounosu, Kengo Iwashige, Ryuichiro Iwano, Mitsuru Saeki, Kenichi Hattori, Kazuhiko Takahashi
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Publication number: 20080063518Abstract: The prevent invention provides a steam turbine having a cross-over duct that can reduce a pressure loss occurring therein and is structured excellently in view of strength. In the steam turbine having a cross-over duct 10 for delivering steam discharged from an intermediate pressure turbine 5 to low pressure turbines 6a, 6b, the intermediate pressure turbine provides two outlets 13a, 13b for discharging exhaust steam, the low pressure turbine provides two inlets 14a, 14b, the outlets and the inlets are arranged on the same straight line as viewed from a planar direction, one of the outlets and one of the inlets which are in close position each other are connected through a cross-over duct 10a, the other of the outlets and the other of the inlets which are in far position each other are connected through a cross-over duct 10b, and the cross-over ducts are arranged to be at two stages in the up-down direction.Type: ApplicationFiled: August 6, 2007Publication date: March 13, 2008Inventors: Shunsuke Mizumi, Ryuichiro Iwano, Koji Ishibashi, Goingwon Lee
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Publication number: 20060222489Abstract: A turbine exhaust system includes an exhaust hood inner casing that involves the turbine rotor; an exhaust hood outer casing that forms an exhaust hood, together with the exhaust hood inner casing; a flow guide that forms an annular diffuser flow path; and exhaust hood upper part flow guides each of which serves as means for separating annular plane upper part exhaust steam within a range including a vertical upward flow out of exhaust steam radially discharging from the flow guide into the exhaust hood, from other exhaust steam, to thereby introduce the separated steam to the condenser, wherein exhaust steam introduction-side end faces thereof are located further toward the upper side than the horizontal plane containing the central axis of the turbine rotor.Type: ApplicationFiled: February 3, 2006Publication date: October 5, 2006Inventors: Shunsuke Mizumi, Ryuichiro Iwano, Koji Ishibashi, Going Lee
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Publication number: 20060029495Abstract: The guide vanes comprise two kinds of guide vanes which are alternatively placed around the angular direction. One kind of the guide vanes have longer length than the other kinds of the guide vanes at the region which is close to the surface of hub but have substantially same lengths the other kind of the guide vanes at the region which is close to the shroud. The leading edges of the second kind of guide vane locate in the further downstream of the pump axial direction than the fist kind of guide vanes.Type: ApplicationFiled: July 22, 2005Publication date: February 9, 2006Inventors: Takanori Ishii, Ryuichiro Iwano, Akira Manabe, Yasuhiro Inoue
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Patent number: 6334757Abstract: A water turbine comprises a runner, guide vanes formed of a plurality of vanes arranged outside the runner in a peripheral direction, each of the vanes being rotatable about a center axis thereof parallel with a rotation shaft of the runner, stay vanes formed of a plurality of vanes outside the guide vanes in a peripheral direction, and a casing covering the outside of the stay vanes, wherein sections of each vane of the guide vanes perpendicular to the center axis are displaced to the rotation direction of the runner from an upper side of the runner to a lower side, under the condition that the guide vanes are shutdown.Type: GrantFiled: October 13, 1999Date of Patent: January 1, 2002Assignee: Hitachi, Ltd.Inventors: Ryuichiro Iwano, Katsumasa Shinmei