Patents by Inventor Yasushi Hayasaka
Yasushi Hayasaka 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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Publication number: 20070065283Abstract: A gas turbine rotor blade capable of effectively reducing creep damage by forming a cooling through hole to cool a target area in which significant creep damage of a shroud cover is predicted based on analysis of stress and temperature acting on the gas turbine rotor blade. A gas turbine using the rotor blade, and a power plant using the gas turbine are also provided. The gas turbine rotor blade includes a blade section provided with a shroud cover at an outer peripheral end thereof, and a platform, a shank and a dovetail which are formed in integral structure to successively continue from the blade section. An inner cooling hole is formed to penetrate through the gas turbine rotor blade from the dovetail to the shroud cover. The shroud cover has a cooling through hole formed to open in an outer surface of the shroud cover and extend in communication with the inner cooling hole.Type: ApplicationFiled: May 15, 2006Publication date: March 22, 2007Inventors: Masaru Sekihara, Yasushi Hayasaka, Kunihiro Ichikawa
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Patent number: 7152005Abstract: In order to provide an operation and maintenance planning aiding system for a power generation installation which prepares an operation plan for a plurality of power generation units by making use of actual plant data and based on a total judgment including a variety of circumstances of the machine and apparatus or the parts thereof in the power generation units, in the system the plurality of power generation units 41, 42, 51 and 52, a power supply command center 3 and a service center 1 are arranged and connected via a communication network 6, the service center 1 obtains the plant data via the communication network 6 from the plurality of power generation units 41, 42, 51 and 52, calculates in real time a power generation efficiency of a concerned power generation unit for every plurality of power generation units 41, 42, 51 and 52 by making use of the obtained plant data and design data of the concerned power generation unit and prepares an operation and maintenance plan for each of the power generation uType: GrantFiled: April 12, 2005Date of Patent: December 19, 2006Assignee: Hitachi, Ltd.Inventors: Yoshiharu Hayashi, Hidekazu Fujimura, Masao Furukawa, Katsuhito Shimizu, Yasushi Hayasaka
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Publication number: 20060271553Abstract: Documents used for process control can be managed and maintained from a document server and a terminal. In order to update the documents quickly so that an operated process is always kept in the most preferable state of operation, the document server stores and manages production documents used for actually controlling and monitoring a control system plant, whereas the terminal system is used to refer and edit plant documents. The terminal can synchronize contents of the plant documents in the document server with those in the control system before storing the synchronized plant documents in the terminal.Type: ApplicationFiled: February 15, 2006Publication date: November 30, 2006Inventors: Katsuhito Shimizu, Tooru Kimura, Yoshio Maruyama, Yukiko Mouri, Satoru Shimizu, Hidekazu Fujimura, Masao Furukawa, Yoshiharu Hayashi, Yasushi Hayasaka
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Patent number: 7107295Abstract: Documents used for process control can be managed and maintained from a document server and a terminal. In order to update the documents quickly so that an operated process is always kept in the most preferable state of operation, the document server stores and manages production documents used for actually controlling and monitoring a control system plant, whereas the terminal system is used to refer and edit plant documents. The terminal can synchronize contents of the plant documents in the document server with those in the control system before storing the synchronized plant documents in the terminal.Type: GrantFiled: January 24, 2003Date of Patent: September 12, 2006Assignee: Hitachi, Ltd.Inventors: Katsuhito Shimizu, Tooru Kimura, Yoshio Maruyama, Yukiko Mouri, Satoru Shimizu, Hidekazu Fujimura, Masao Furukawa, Yoshiharu Hayashi, Yasushi Hayasaka
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Patent number: 7065472Abstract: In order to provide an operation and maintenance planning aiding system for a power generation installation which prepares an operation plan for a plurality of power generation units by making use of actual plant data and based on a total judgement including a variety of circumstances of the machine and apparatus or the parts thereof in the power generation units, in the system the plurality of power generation units 41, 42, 51 and 52, a power supply command center 3 and a service center 1 are arranged and connected via a communication network 6, the service center 1 obtains the plant data via the communication network 6 from the plurality of power generation units 41, 42, 51 and 52, calculates in real time a power generation efficiency of a concerned power generation unit for every plurality of power generation units 41, 42 51 and 52 by making use of the obtained plant data and design data of the concerned power generation unit and prepares an operation and maintenance plan for each of the power generation uType: GrantFiled: January 13, 2004Date of Patent: June 20, 2006Assignee: Hitachi, Ltd.Inventors: Yoshiharu Hayashi, Hidekazu Fujimura, Masao Furukawa, Katsuhito Shimizu, Yasushi Hayasaka
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Patent number: 7065471Abstract: An operation monitoring unit 11 for acquiring process data from sensors 10 installed to a gas turbine and operation information of the gas turbine; communication units 12, 14 for transmitting each of said two kinds of data on the gas turbine acquired in the operation monitoring unit 11; an analysis server 16 which calculates values of equivalent operating time using each of the two kinds of data obtained through the communication units 12, 14, the value of equivalent operating time evaluating a degree of damage of a diagnosed position for each of a plurality of degradation-and-damage modes, and calculates a value of whole equivalent operating time by adding the values of equivalent operating time for the individual degradation-and-damage modes; and a facility management unit 15 client-server systemized using the analysis server 16 and a WWW browser 20 or WWW server 19 are provided.Type: GrantFiled: June 18, 2001Date of Patent: June 20, 2006Assignee: Hitachi, Ltd.Inventors: Jinichiro Gotoh, Yasushi Hayasaka, Shigeo Sakurai, Hiraku Ikeda
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Publication number: 20050246068Abstract: In order to provide an operation and maintenance planning aiding system for a power generation installation which prepares an operation plan for a plurality of power generation units by making use of actual plant data and based on a total judgment including a variety of circumstances of the machine and apparatus or the parts thereof in the power generation units, in the system the plurality of power generation units 41, 42, 51 and 52, a power supply command center 3 and a service center 1 are arranged and connected via a communication network 6, the service center 1 obtains the plant data via the communication network 6 from the plurality of power generation units 41, 42, 51 and 52, calculates in real time a power generation efficiency of a concerned power generation unit for every plurality of power generation units 41, 42, 51 and 52 by making use of the obtained plant data and design data of the concerned power generation unit and prepares an operation and maintenance plan for each of the power generation uType: ApplicationFiled: April 12, 2005Publication date: November 3, 2005Applicant: Hitachi, Ltd.Inventors: Yoshiharu Hayashi, Hidekazu Fujimura, Masao Furukawa, Katsuhito Shimizu, Yasushi Hayasaka
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Publication number: 20050193738Abstract: In a gas turbine plant and a gas turbine power generator plant, as a device of reducing the heat transfer from the gas turbine to the compressor, for instance, an air flow path for circulating part of compressed air from the compressor toward the gas turbine is formed between the gas turbine and the compressor. With the air flow path, which is a heat transfer reducing device, the heat conducted from the gas turbine to the compressor can be reduced by cooling or interception, and accordingly the temperature on the compressor side does not rise high, making it possible to prevent the performance of the compressor from deteriorating.Type: ApplicationFiled: November 17, 2004Publication date: September 8, 2005Inventors: Yasushi Hayasaka, Masaru Sekihara
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Patent number: 6907381Abstract: In order to provide an operation and maintenance planning aiding system for a power generation installation which prepares an operation plan for a plurality of power generation units by making use of actual plant data and based on a total judgment including a variety of circumstances of the machine and apparatus or the parts thereof in the power generation units, in the system the plurality of power generation units 41, 42, 51 and 52, a power supply command center 3 and a service center 1 are arranged and connected via a communication network 6, the service center 1 obtains the plant data via the communication network 6 from the plurality of power generation units 41, 42, 51 and 52, calculates in real time a power generation efficiency of a concerned power generation unit for every plurality of power generation units 41, 42 51 and 52 by making use of the obtained plant data and design data of the concerned power generation unit and prepares an operation and maintenance plan for each of the power generation unType: GrantFiled: March 29, 2004Date of Patent: June 14, 2005Assignee: Hitachi, Ltd.Inventors: Yoshiharu Hayashi, Hidekazu Fujimura, Masao Furukawa, Katsuhito Shimizu, Yasushi Hayasaka
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Patent number: 6895289Abstract: Documents used for process control can be managed and maintained from a document server and a terminal. In order to update the documents quickly so that an operated process is always kept in the most preferable state of operation, the document server stores and manages production documents used for actually controlling and monitoring a control system plant, whereas the terminal system is used to refer and edit plant documents. The terminal can synchronize contents of the plant documents in the document server with those in the control system before storing the synchronized plant documents in the terminal.Type: GrantFiled: November 12, 2002Date of Patent: May 17, 2005Assignee: Hitachi, Ltd.Inventors: Katsuhito Shimizu, Tooru Kimura, Yoshio Maruyama, Yukiko Mouri, Satoru Shimizu, Hidekazu Fujimura, Masao Furukawa, Yoshiharu Hayashi, Yasushi Hayasaka
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Patent number: 6874324Abstract: In a gas turbine power generator, a compressor rotor and a junction boss are assembled by fitting a convex faucet joint provided on the compressor rotor and a concave faucet joint provided on the junction boss, in a freely releasable manner, and the compressor rotor and a rotor shaft are assembled by fitting the convex faucet joint provided on the compressor rotor and a concave faucet joint provided on the rotor shaft, in a freely releasable manner, and those compressor rotor, the rotor shaft and a generator core are combined in series and fastened by using a tie bolt and a nut, which is connected to the junction boss of the turbine rotor.Type: GrantFiled: April 30, 2003Date of Patent: April 5, 2005Assignee: Hitachi, Ltd.Inventors: Masaru Sekihara, Saburo Usami, Yasushi Hayasaka, Satoschi Dodo
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Patent number: 6853930Abstract: In order to provide an operation and maintenance planning aiding system for a power generation installation which prepares an operation plan for a plurality of power generation units by making use of actual plant data and based on a total judgement including a variety of circumstances of the machine and apparatus or the parts thereof in the power generation units, in the system the plurality of power generation units 41, 42, 51 and 52, a power supply command center 3 and a service center 1 are arranged and connected via a communication network 6, the service center 1 obtains the plant data via the communication network 6 from the plurality of power generation units 41, 42, 51 and 52, calculates in real time a power generation efficiency of a concerned power generation unit for every plurality of power generation units 41, 42 51 and 52 by making use of the obtained plant data and design data of the concerned power generation unit and prepares an operation and maintenance plan for each of the power generation uType: GrantFiled: September 14, 2001Date of Patent: February 8, 2005Assignee: Hitachi, Ltd.Inventors: Yoshiharu Hayashi, Hidekazu Fujimura, Masao Furukawa, Katsuhito Shimizu, Yasushi Hayasaka
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Publication number: 20040181369Abstract: In order to provide an operation and maintenance planning aiding system for a power generation installation which prepares an operation plan for a plurality of power generation units by making use of actual plant data and based on a total judgment including a variety of circumstances of the machine and apparatus or the parts thereof in the power generation units, in the system the plurality of power generation units 41, 42, 51 and 52, a power supply command center 3 and a service center 1 are arranged and connected via a communication network 6, the service center 1 obtains the plant data via the communication network 6 from the plurality of power generation units 41, 42, 51 and 52, calculates in real time a power generation efficiency of a concerned power generation unit for every plurality of power generation units 41, 42 51 and 52 by making use of the obtained plant data and design data of the concerned power generation unit and prepares an operation and maintenance plan for each of the power generation unType: ApplicationFiled: March 29, 2004Publication date: September 16, 2004Applicant: Hitachi, Ltd.Inventors: Yoshiharu Hayashi, Hidekazu Fujimura, Masao Furukawa, Katsuhito Shimizu, Yasushi Hayasaka
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Publication number: 20040148129Abstract: An operation monitoring unit 11 for acquiring process data from sensors 10 installed to a gas turbine and operation information of the gas turbine; communication units 12, 14 for transmitting each of said two kinds of data on the gas turbine acquired in the operation monitoring unit 11; an analysis server 16 which calculates values of equivalent operating time using each of the two kinds of data obtained through the communication units 12, 14, the value of equivalent operating time evaluating a degree of damage of a diagnosed position for each of a plurality of degradation-and-damage modes, and calculates a value of whole equivalent operating time by adding the values of equivalent operating time for the individual degradation-and-damage modes; and a facility management unit 15 client-server systemized using the analysis server 16 and a WWW browser 20 or WWW server 19 are provided.Type: ApplicationFiled: August 18, 2003Publication date: July 29, 2004Inventors: Jinichiro Gotoh, Yasushi Hayasaka, Shigeo Sakurai, Hiraku Ikeda
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Publication number: 20040148132Abstract: In order to provide an operation and maintenance planning aiding system for a power generation installation which prepares an operation plan for a plurality of power generation units by making use of actual plant data and based on a total judgement including a variety of circumstances of the machine and apparatus or the parts thereof in the power generation units, in the system the plurality of power generation units 41, 42, 51 and 52, a power supply command center 3 and a service center 1 are arranged and connected via a communication network 6, the service center 1 obtains the plant data via the communication network 6 from the plurality of power generation units 41, 42, 51 and 52, calculates in real time a power generation efficiency of a concerned power generation unit for every plurality of power generation units 41, 42 51 and 52 by making use of the obtained plant data and design data of the concerned power generation unit and prepares an operation and maintenance plan for each of the power generation uType: ApplicationFiled: January 13, 2004Publication date: July 29, 2004Applicant: Hitachi, Ltd.Inventors: Yoshiharu Hayashi, Hidekazu Fujimura, Masao Furukawa, Katsuhito Shimizu, Yasushi Hayasaka
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Patent number: 6691065Abstract: In order to provide an operation and maintenance planning aiding system for a power generation installation which prepares an operation plan for a plurality of power generation units by making use of actual plant data and based on a total judgement including a variety of circumstances of the machine and apparatus or the parts thereof in the power generation units, in the system the plurality of power generation units 41, 42, 51 and 52, a power supply command center 3 and a service center 1 are arranged and connected via a communication network 6, the service center 1 obtains the plant data via the communication network 6 from the plurality of power generation units 41, 42, 51 and 52, calculates in real time a power generation efficiency of a concerned power generation unit for every plurality of power generation units 41, 42 51 and 52 by making use of the obtained plant data and design data of the concerned power generation unit and prepares an operation and maintenance plan for each of the power generation uType: GrantFiled: August 15, 2002Date of Patent: February 10, 2004Assignee: Hitachi, Ltd.Inventors: Yoshiharu Hayashi, Hidekazu Fujimura, Masao Furukawa, Katsuhito Shimizu, Yasushi Hayasaka
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Publication number: 20030217548Abstract: In a gas turbine power generator, a compressor rotor and a junction boss are assembled by fitting a convex faucet joint provided on the compressor rotor and a concave faucet joint provided on the junction boss, in a freely releasable manner, and the compressor rotor and a rotor shaft are assembled by fitting the convex faucet joint provided on the compressor rotor and a concave faucet joint provided on the rotor shaft, in a freely releasable manner, and those compressor rotor, the rotor shaft and a generator core are combined in series and fastened by using a tie bolt and a nut, which is connected to the junction boss of the turbine rotor.Type: ApplicationFiled: April 30, 2003Publication date: November 27, 2003Applicant: Hitachi, Ltd.Inventors: Masaru Sekihara, Saburo Usami, Yasushi Hayasaka, Satoschi Dodo
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Patent number: 6636813Abstract: A life management system for high-temperature parts of a gas turbine has one server system 3 and a plurality of client systems 5a, 5b, 5c, and 5d, all of which are connected via an Intranet. Further, the server system 3 manages a program for performing evaluation of the remaining life and the life management, and each of the client systems 5a, 5b, 5c, and 5d has a subprogram for accessing the database 4 and for entering data respectively. The clients are dedicated to different objects and share respective element data such as real component damage, design, materials, etc. which are necessary for the evaluation of the remaining life. Further, this system enables the operation of the gas turbine to be optimized based on the damage of the evaluated parts, hence contributing to operational cost reduction of the gas turbine.Type: GrantFiled: November 15, 2001Date of Patent: October 21, 2003Assignee: Hitchi, Ltd.Inventors: Nobuhiro Isobe, Yasushi Hayasaka, Shigeo Sakurai, Kunihiro Ichikawa
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Publication number: 20030109943Abstract: Documents used for process control can be managed and maintained from a document server and a terminal. In order to update the documents quickly so that an operated process is always kept in the most preferable state of operation, the document server stores and manages production documents used for actually controlling and monitoring a control system plant, whereas the terminal system is used to refer and edit plant documents. The terminal can synchronize contents of the plant documents in the document server with those in the control system before storing the synchronized plant documents in the terminal.Type: ApplicationFiled: January 24, 2003Publication date: June 12, 2003Inventors: Katsuhito Shimizu, Tooru Kimura, Yoshio Maruyama, Yukiko Mouri, Satoru Shimizu, Hidekazu Fujimura, Masao Furukawa, Yoshiharu Hayashi, Yasushi Hayasaka
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Publication number: 20030105740Abstract: Documents used for process control can be managed and maintained from a document server and a terminal. In order to update the documents quickly so that an operated process is always kept in the most preferable state of operation, the document server stores and manages production documents used for actually controlling and monitoring a control system plant, whereas the terminal system is used to refer and edit plant documents. The terminal can synchronize contents of the plant documents in the document server with those in the control system before storing the synchronized plant documents in the terminal.Type: ApplicationFiled: November 12, 2002Publication date: June 5, 2003Inventors: Katsuhito Shimizu, Tooru Kimura, Yoshio Maruyama, Yukiko Mouri, Satoru Shimizu, Hidekazu Fujimura, Masao Furukawa, Yoshiharu Hayashi, Yasushi Hayasaka