Patents by Inventor Shunsuke Mizumi
Shunsuke Mizumi 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: 11149589Abstract: In assembling a turbine including: a casing consisting of an upper half part and a lower half part fastened together by bolts; a stationary body accommodated in the casing and supported by the lower half part; and a rotary body supported by a plurality of bearings so as to be situated on the inner side of the stationary body, there are executed: a procedure of reading a finite element model of the three-dimensional configuration of the turbine; a reading procedure of reading actual measurement information on the three-dimensional configuration of the upper half part and the lower half part of the casing in the open state; a model correction procedure of reflecting actual measurement information of an evaluated portion that is a specific part of the casing in the finite element model and generating a correction model obtained through correction of the finite element model; a deformation amount estimation procedure of estimating the movement amount of the evaluated portion generated when the upper half part andType: GrantFiled: October 3, 2018Date of Patent: October 19, 2021Assignee: Mitsubishi Power, Ltd.Inventors: Kenji Yashirodai, Shunsuke Mizumi, Koji Ishibashi, Jie Huang, Juichi Kodera
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Publication number: 20200408098Abstract: A stationary blade includes a main unit having a hollow blade structure formed from a metal plate by plastic forming. The stationary blade includes a blade tail section. In a blade tail upper portion, the metal plate has a concave-shaped recess and a rib formed on an inner surface side thereof, and the metal plate further has slits formed by slitting on a blade pressure side thereof, so that droplets affixed on a blade surface can be guided into an inside of the hollow blade when the blade tail section is joined to the hollow blade main unit. The recess in the metal plate is covered so as to be lidded by a suction-side protrusion of a suction-side metal plate from a blade suction side to thereby form a hollow blade tail section. The metal plates are welded together to the main unit.Type: ApplicationFiled: September 10, 2020Publication date: December 31, 2020Inventors: Susumu NAKANO, Koji ISHIBASHI, Shunsuke MIZUMI, Masaki MATSUDA, Takeshi KUDO
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Publication number: 20200326172Abstract: A method and system for measuring a turbine shape is provided in which an appropriate measurement accuracy can be achieved that is sufficient to prevent a failure to recognize features of shape of a measurement object, with extension of a measurement time suppressed. In a turbine including casings, recesses and protrusions on flange surfaces of the casings are measured at measurement intervals M set on the basis of the entire length L of flange portions in an axial direction, the number of bolts N joining the flange portions, and intervals between the bolts in the axial direction of the flange portions.Type: ApplicationFiled: March 27, 2020Publication date: October 15, 2020Inventors: Koji ISHIBASHI, Shunsuke MIZUMI, Kenji YASHIRODAI, Jie HUANG
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Patent number: 10794196Abstract: A stationary blade includes a main unit having a hollow blade structure formed from a metal plate by plastic forming. The stationary blade includes a blade tail section. In a blade tail upper portion, the metal plate has a concave-shaped recess and a rib formed on an inner surface side thereof and the metal plate further has slits formed by slitting on a blade pressure side thereof, so that droplets affixed on a blade surface can be guided into an inside of the hollow blade when the blade tail section is joined to the hollow blade main unit. The recess in the metal plate is covered so as to be lidded by a suction-side protrusion of a suction-side metal plate from a blade suction side to thereby form a hollow blade tail section. The metal plates are welded together to the main unit.Type: GrantFiled: November 8, 2018Date of Patent: October 6, 2020Assignee: Mitsubishi Hitachi Power Systems, Ltd.Inventors: Susumu Nakano, Koji Ishibashi, Shunsuke Mizumi, Masaki Matsuda, Takeshi Kudo
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Patent number: 10635086Abstract: The invention is directed to maintaining the accuracy in the positional adjustment of a stationary part while shortening a turbine assembly period through the omission of the temporary assembly of a casing.Type: GrantFiled: April 19, 2018Date of Patent: April 28, 2020Assignee: Mitsubishi Hitachi Power Systems, Ltd.Inventors: Kenji Yashirodai, Juichi Kodera, Shunsuke Mizumi, Koji Ishibashi
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Patent number: 10502098Abstract: A turbine assembly method includes a positional information measurement process in which positional information on a plurality of specific portions set on an outer surface of a casing is measured in a state before releasing of bolt fastening of the casing at a time of disassembly of the turbine and in a predetermined disassembly state after the releasing of the bolt fastening, and an alignment process in which positional adjustment of a stationary component with respect to the casing is made based on the measurement results of the positional information on the specific portions in the positional information measurement process.Type: GrantFiled: November 21, 2017Date of Patent: December 10, 2019Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Shunsuke Mizumi, Juichi Kodera, Koji Ishibashi
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Patent number: 10378388Abstract: An exhaust hood for a steam turbine includes a bearing cone; an annular flow guide; and an external casing surrounding the bearing cone and the flow guide. Meridional shapes of the flow guide at respective circumferential positions are shapes obtained by rotating one representative shape around an upstream end of the representative shape in a meridional plane and by reducing or maintaining a radial length of the representative shape. A circumferential distribution of inclination angles of an upstream end of the flow guide with respect to a center axis of a turbine rotor of the steam turbine has representative inclination angles at respective representative positions in the circumferential direction. The circumferential distribution between the representative positions is defined by a linear interpolation. Each representative position is a position where the inclination angles change from increasing or decreasing to decreasing or increasing, or from constant to increasing or decreasing.Type: GrantFiled: January 11, 2017Date of Patent: August 13, 2019Assignee: Mitsubishi Hitachi Power Systems, Ltd.Inventors: Hideki Ono, Shunsuke Mizumi, Takeshi Kudo, Tatsuhito Hattori
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Publication number: 20190107007Abstract: In assembling a turbine including: a casing consisting of an upper half part and a lower half part fastened together by bolts; a stationary body accommodated in the casing and supported by the lower half part; and a rotary body supported by a plurality of bearings so as to be situated on the inner side of the stationary body, there are executed: a procedure of reading a finite element model of the three-dimensional configuration of the turbine; a reading procedure of reading actual measurement information on the three-dimensional configuration of the upper half part and the lower half part of the casing in the open state; a model correction procedure of reflecting actual measurement information of an evaluated portion that is a specific part of the casing in the finite element model and generating a correction model obtained through correction of the finite element model; a deformation amount estimation procedure of estimating the movement amount of the evaluated portion generated when the upper half part andType: ApplicationFiled: October 3, 2018Publication date: April 11, 2019Inventors: Kenji YASHIRODAI, Shunsuke MIZUMI, Koji ISHIBASHI, Jie HUANG, Juichi KODERA
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Publication number: 20190078448Abstract: A stationary blade includes a main unit having a hollow blade structure formed from a metal plate by plastic forming. The stationary blade includes a blade tail section. In a blade tail upper portion, the metal plate has a concave-shaped recess and a rib formed on an inner surface side thereof and the metal plate further has slits formed by slitting on a blade pressure side thereof, so that droplets affixed on a blade surface can be guided into an inside of the hollow blade when the blade tail section is joined to the hollow blade main unit. The recess in the metal plate is covered so as to be lidded by a suction-side protrusion of a suction-side metal plate from a blade suction side to thereby form a hollow blade tail section. The metal plates are welded together to the main unit.Type: ApplicationFiled: November 8, 2018Publication date: March 14, 2019Inventors: Susumu NAKANO, Koji ISHIBASHI, Shunsuke MIZUMI, Masaki MATSUDA, Takeshi KUDO
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Patent number: 10145248Abstract: A stationary blade includes a main unit having a hollow blade structure formed from a metal plate by plastic forming. The stationary blade includes a blade tail section. In a blade tail upper portion, the metal plate has a concave-shaped recess and a rib formed on an inner surface side thereof and the metal plate further has slits formed by slitting on a blade pressure side thereof, so that droplets affixed on a blade surface can be guided into an inside of the hollow blade when the blade tail section is joined to the hollow blade main unit. The recess in the metal plate is covered so as to be lidded by a suction-side protrusion of a suction-side metal plate from a blade suction side to thereby form a hollow blade tail section. The metal plates are welded together to the main unit.Type: GrantFiled: November 20, 2014Date of Patent: December 4, 2018Assignee: Mitsubishi Hitachi Power Systems, Ltd.Inventors: Susumu Nakano, Koji Ishibashi, Shunsuke Mizumi, Masaki Matsuda, Takeshi Kudo
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Publication number: 20180307205Abstract: The invention is directed to maintaining the accuracy in the positional adjustment of a stationary part while shortening a turbine assembly period through the omission of the temporary assembly of a casing.Type: ApplicationFiled: April 19, 2018Publication date: October 25, 2018Inventors: Kenji YASHIRODAI, Juichi KODERA, Shunsuke MIZUMI, Koji ISHIBASHI
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Publication number: 20180142571Abstract: A turbine assembly method includes a positional information measurement process in which positional information on a plurality of specific portions set on an outer surface of a casing is measured in a state before releasing of bolt fastening of the casing at a time of disassembly of the turbine and in a predetermined disassembly state after the releasing of the bolt fastening, and an alignment process in which positional adjustment of a stationary component with respect to the casing is made based on the measurement results of the positional information on the specific portions in the positional information measurement process.Type: ApplicationFiled: November 21, 2017Publication date: May 24, 2018Inventors: Shunsuke MIZUMI, Juichi KODERA, Koji ISHIBASHI
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Publication number: 20170198608Abstract: An exhaust hood for a steam turbine including a turbine rotor that is rotatable around a center axis and moving blades disposed on an outer periphery side of the turbine rotor includes: a bearing cone disposed on an inner periphery side and on a downstream side of the moving blades of a final stage; an annular flow guide disposed on an outer periphery side and on the downstream side of the moving blades of the final stage; and an external casing surrounding the bearing cone and the flow guide. Meridional shapes of the flow guide at respective circumferential positions are shapes obtained by rotating a certain representative shape around an upstream end of the certain representative shape in a meridional plane and by equally maintaining or reducing a radial length of the representative shape.Type: ApplicationFiled: January 11, 2017Publication date: July 13, 2017Inventors: Hideki ONO, Shunsuke MIZUMI, Takeshi KUDO, Tatsuhito HATTORI
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Patent number: 9598964Abstract: A plurality of slots with different widths are provided in a plurality of line on a stationary blade surface. More specifically, the steam turbine stationary blade has a hollow nozzle with a penetrating space, which is connected with a diaphragm outer ring or inner ring, and a plurality of suction slots extending radially which are arranged on the blade surface. At a position where a water film deposited to the blade surface is thick, the width of a slot is smaller and at a position where the water film is thin, the width of a slot is larger.Type: GrantFiled: September 6, 2013Date of Patent: March 21, 2017Assignee: Mitsubishi Hitachi Power Systems, Ltd.Inventors: Koji Ishibashi, Susumu Nakano, Shunsuke Mizumi, Takeshi Kudo
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Publication number: 20160169023Abstract: It is an object of the present invention to provide a sealing mechanism that, while preventing a clearance that passes in an axial direction through an entire abutting surface without involving large resistance and that invites blow-by of a working fluid, can prevent adjacent seal segments from sticking to each other, and a method for manufacturing the sealing mechanism. A sealing device includes: an annular sealing ring that includes a plurality of seal segments annularly juxtaposed; a plurality of seal fins provided in an axial direction on an inner peripheral surface of the sealing ring; a joint surface on a circumferential end of the seal segment, the joint surface facing a joint surface on an adjacent seal segment; a groove that extends in a radial direction in the joint surface; and a protrusion formed by bending part of a surface that constitutes a long side of the groove toward an outside of the joint surface.Type: ApplicationFiled: December 10, 2015Publication date: June 16, 2016Inventors: Shunsuke MIZUMI, Takeshi KUDO, Koji OGATA, Shinji OIKAWA
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Publication number: 20150139812Abstract: A stationary blade includes a main unit having a hollow blade structure formed from a metal plate by plastic forming. The stationary blade includes a blade tail section. In a blade tail upper portion, the metal plate has a concave-shaped recess and a rib formed on an inner surface side thereof and the metal plate further has slits formed by slitting on a blade pressure side thereof, so that droplets affixed on a blade surface can be guided into an inside of the hollow blade when the blade tail section is joined to the hollow blade main unit. The recess in the metal plate is covered so as to be lidded by a suction-side protrusion of a suction-side metal plate from a blade suction side to thereby form a hollow blade tail section. The metal plates are welded together to the main unit.Type: ApplicationFiled: November 20, 2014Publication date: May 21, 2015Inventors: Susumu NAKANO, Koji ISHIBASHI, Shunsuke MIZUMI, Masaki MATSUDA, Takeshi KUDO
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Patent number: 9033656Abstract: An exhaust system for a steam turbine provided with an improved annular flow guide in a high or intermediate turbine. The improved flow guide reduces flow turbulence in an exhaust hood and reduces pressure loss to thereby improve turbine plant efficiency. The shape (vertically symmetric) of a flow guide 5A according to a conventional technology was modified into the shape (vertically asymmetric) of a flow guide 5 such that the length of a downstream flow guide portion 5d is greater than that of a upstream flow guide portion 5u. Numerical analyses were performed to find the optimum flow guide occupation ratio of the conventional technology and the corresponding total pressure loss coefficient. The obtained values were used as reference values. Further, the flow guide occupation ratio of the upstream flow guide portion 5u was set at 0.4 and the flow guide occupation ratio of the downstream flow guide portion 5d was set at 0.Type: GrantFiled: January 4, 2012Date of Patent: May 19, 2015Assignee: Mitsubishi Hitachi Power Systems, Ltd.Inventors: Shunsuke Mizumi, Koji Ogata, Takeshi Kudo, Noriyo Nishijima, Yoshiaki Onda
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Publication number: 20140079556Abstract: A plurality of slots with different widths are provided in a plurality of line on a stationary blade surface. More specifically, the steam turbine stationary blade has a hollow nozzle with a penetrating space, which is connected with a diaphragm outer ring or inner ring, and a plurality of suction slots extending radially which are arranged on the blade surface. At a position where a water film deposited to the blade surface is thick, the width of a slot is smaller and at a position where the water film is thin, the width of a slot is larger.Type: ApplicationFiled: September 6, 2013Publication date: March 20, 2014Applicant: HITACHI, LTD.Inventors: Koji ISHIBASHI, Susumu NAKANO, Shunsuke MIZUMI, Takeshi KUDO
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Publication number: 20140030065Abstract: The present invention is a steam turbine comprising a turbine stage having a stationary blade and a moving blade provided on the downstream side of the stationary blade in a working fluid flow direction, wherein the stationary blade is formed in a hollow blade shape by deformation processing a metal plate, and wherein a slit to guide liquid droplets deposited on a blade wall surface to the inside of the blade is formed in the blade wall by overlaying an airfoil suction-side metal plate and an airfoil pressure-side metal plate with a gap therebetween in a blade tail part of the stationary blade.Type: ApplicationFiled: July 29, 2013Publication date: January 30, 2014Applicant: Hitachi, Ltd.Inventors: Susumu NAKANO, Shunsuke MIZUMI, Takeshi KUDO, Kazuya SAKAKIBARA, Koji ISHIBASHI, Masaki MATSUDA
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Publication number: 20120183397Abstract: An exhaust system for a steam turbine provided with an improved annular flow guide in a high or intermediate turbine. The improved flow guide reduces flow turbulence in an exhaust hood and reduces pressure loss to thereby improve turbine plant efficiency. The shape (vertically symmetric) of a flow guide 5A according to a conventional technology was modified into the shape (vertically asymmetric) of a flow guide 5 such that the length of a downstream flow guide portion 5d is greater than that of a upstream flow guide portion 5u. Numerical analyses were performed to find the optimum flow guide occupation ratio of the conventional technology and the corresponding total pressure loss coefficient. The obtained values were used as reference values. Further, the flow guide occupation ratio of the upstream flow guide portion 5u was set at 0.4 and the flow guide occupation ratio of the downstream flow guide portion 5d was set at 0.Type: ApplicationFiled: January 4, 2012Publication date: July 19, 2012Applicant: Hitachi, Ltd.Inventors: Shunsuke MIZUMI, Koji Ogata, Takeshi Kudo, Noriyo Nishijima, Yoshiaki Onda