Patents by Inventor Hirotoshi Arihara
Hirotoshi Arihara 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: 10677644Abstract: A dynamic characteristic measurement device of the present invention includes magnetic force generators (1a, 1b, 2a, 2b) arranged on the back surface side of impellers (4, 5), the magnetic force generators that oscillate the impellers (4, 5) with magnetic force, an oscillation controller (12) that drives these magnetic force generators, and vibration sensors (13, 14) that detect vibration of a rotation shaft (3). The dynamic characteristic measurement device further includes an arithmetic device (16) that calculates a dynamic characteristic of a rotor (6) by implementing a frequency analysis and a mode analysis based on an oscillation signal from the oscillation controller (12) and a vibration signal from the vibration sensors (13, 14).Type: GrantFiled: March 30, 2018Date of Patent: June 9, 2020Assignee: Kobe Steel, Ltd.Inventor: Hirotoshi Arihara
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Patent number: 10612970Abstract: A centrifugal rotating machine includes a rotor in which impellers are attached to the axial ends of a rotating shaft that extends in the axial direction, said impellers rotating in a rotating direction around the rotating shaft so as to draw in fluid from an intake side in the axial direction and discharge fluid from the outer side thereof in the radial direction. According to this device for measuring dynamic characteristics of said centrifugal rotating machine, a cover for covering an impeller is attached to a region of the impeller other than an intake opening on the intake side thereof, and a magnetic force generator for vibrating the impeller by magnetic force is disposed so as to face the cover.Type: GrantFiled: September 13, 2016Date of Patent: April 7, 2020Assignee: Kobe Steel, Ltd.Inventors: Hirotoshi Arihara, Komei Fujioka, Yuki Kameyama
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Publication number: 20190295758Abstract: This magnetic core (1) comprises: a columnar core part (11) that is arranged inside a coil (2); and a tubular yoke part (12) that is arranged outside the coil (2). The core part (11) and the yoke part (12) overlap the arrangement region of the coil (2) in the axial direction. The entirety of the core part (11) is configured from a high magnetic flux density material that has a higher magnetic flux density than commonly used magnetic materials.Type: ApplicationFiled: May 16, 2017Publication date: September 26, 2019Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)Inventors: Hirotoshi ARIHARA, Komei FUJIOKA, Yuki KAMEYAMA
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Patent number: 10415635Abstract: A tilting pad journal bearing includes a bearing housing, a plurality of pads and a projecting portion. The plurality of pads are arranged on an inner circumferential surface of the bearing housing and support a rotary shaft. The projecting portion is provided on a surface of the pad and has a plurality of projections. The projecting portion is provided on a surface other than a pad bearing surface in surfaces of the pad, the pad bearing surface being a surface that faces the rotary shaft.Type: GrantFiled: January 24, 2017Date of Patent: September 17, 2019Assignee: Kobe Steel, Ltd.Inventor: Hirotoshi Arihara
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Publication number: 20190024707Abstract: A tilting pad journal bearing includes a bearing housing, a plurality of pads and a projecting portion. The plurality of pads are arranged on an inner circumferential surface of the bearing housing and support a rotary shaft. The projecting portion is provided on a surface of the pad and has a plurality of projections. The projecting portion is provided on a surface other than a pad bearing surface in surfaces of the pad, the pad bearing surface being a surface that faces the rotary shaft.Type: ApplicationFiled: January 24, 2017Publication date: January 24, 2019Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)Inventor: Hirotoshi ARIHARA
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Patent number: 10094417Abstract: On a facing surface (12a) of a pad (12) that faces a rotation shaft, an oil supply unit (24) is provided in an end region downstream of the rotation shaft in the rotation direction, and the oil supply unit (24) is formed along part of an isopleth of the pressure distribution on the facing surface (12a) generated by a lubricant being caught between the rotation shaft and the facing surface (12a), said part of the isopleth being downstream, in the rotation direction, of the pressure maximum of the pressure distribution.Type: GrantFiled: January 22, 2016Date of Patent: October 9, 2018Assignee: Kobe Steel, Ltd.Inventor: Hirotoshi Arihara
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Publication number: 20180274971Abstract: A dynamic characteristic measurement device of the present invention includes magnetic force generators (1a, 1b, 2a, 2b) arranged on the back surface side of impellers (4, 5), the magnetic force generators that oscillate the impellers (4, 5) with magnetic force, an oscillation controller (12) that drives these magnetic force generators, and vibration sensors (13, 14) that detect vibration of a rotation shaft (3). The dynamic characteristic measurement device further includes an arithmetic device (16) that calculates a dynamic characteristic of a rotor (6) by implementing a frequency analysis and a mode analysis based on an oscillation signal from the oscillation controller (12) and a vibration signal from the vibration sensors (13, 14).Type: ApplicationFiled: March 30, 2018Publication date: September 27, 2018Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventor: Hirotoshi ARIHARA
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Publication number: 20180252576Abstract: A centrifugal rotating machine includes a rotor in which impellers are attached to the axial ends of a rotating shaft that extends in the axial direction, said impellers rotating in a rotating direction around the rotating shaft so as to draw in fluid from an intake side in the axial direction and discharge fluid from the outer side thereof in the radial direction. According to this device for measuring dynamic characteristics of said centrifugal rotating machine, a cover for covering an impeller is attached to a region of the impeller other than an intake opening on the intake side thereof, and a magnetic force generator for vibrating the impeller by magnetic force is disposed so as to face the cover.Type: ApplicationFiled: September 13, 2016Publication date: September 6, 2018Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Hirotoshi ARIHARA, Komei FUJIOKA, Yuki KAMEYAMA
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Patent number: 9964435Abstract: A dynamic characteristic measurement device of the present invention includes magnetic force generators (1a, 1b, 2a, 2b) that are arranged on the back side of impellers (4, 5), the magnetic force, an oscillation controller (12) that drives these magnetic force generators, and vibration sensors (13, 14) that detect vibration of a rotation shaft (3). The dynamic characteristic measurement device further includes an arithmetic device (16) that calculates a dynamic characteristic of a rotor (6) by implementing a frequency analysis and a mode analysis based on an oscillation signal from the oscillation controller (12) and a vibration signal from the vibration sensors (13, 14).Type: GrantFiled: November 13, 2013Date of Patent: May 8, 2018Assignee: Kobe Steel, Ltd.Inventor: Hirotoshi Arihara
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Publication number: 20180003220Abstract: On a facing surface (12a) of a pad (12) that faces a rotation shaft, an oil supply unit (24) is provided in an end region downstream of the rotation shaft in the rotation direction, and the oil supply unit (24) is formed along part of an isopleth of the pressure distribution on the facing surface (12a) generated by a lubricant being caught between the rotation shaft and the facing surface (12a), said part of the isopleth being downstream, in the rotation direction, of the pressure maximum of the pressure distribution.Type: ApplicationFiled: January 22, 2016Publication date: January 4, 2018Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventor: HIROTOSHI ARIHARA
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Publication number: 20150285672Abstract: A dynamic characteristic measurement device of the present invention includes magnetic force generators (1a, 1b, 2a, 2b) that are arranged on the back side of impellers (4, 5), the magnetic force, an oscillation controller (12) that drives these magnetic force generators, and vibration sensors (13, 14) that detect vibration of a rotation shaft (3). The dynamic characteristic measurement device further includes an arithmetic device (16) that calculates a dynamic characteristic of a rotor (6) by implementing a frequency analysis and a mode analysis based on an oscillation signal from the oscillation controller (12) and a vibration signal from the vibration sensors (13, 14).Type: ApplicationFiled: November 13, 2013Publication date: October 8, 2015Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventor: Hirotoshi Arihara