Patents by Inventor Hideyuki Kawajiri
Hideyuki Kawajiri 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: 11306602Abstract: In a guide vane according to an embodiment of the invention, where in a section perpendicular to a guide vane rotation axis, a curvature of a contour line forming a runner side vane surface of the guide vane is referred to as a positive curvature when the contour line is formed to be convex, while the curvature of the contour line is referred to as a negative curvature when the contour line is formed to be concave, a negative curvature portion where the curvature of the contour line becomes negative is provided on the runner side vane surface. The negative curvature portion is formed from an upper end portion to a lower end portion of the runner side vane surface.Type: GrantFiled: January 19, 2021Date of Patent: April 19, 2022Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Hideyuki Kawajiri, Yoshihiro Ishikawa, Hajime Koyama, Yukito Yada
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Publication number: 20210140332Abstract: In a guide vane according to an embodiment of the invention, where in a section perpendicular to a guide vane rotation axis, a curvature of a contour line forming a runner side vane surface of the guide vane is referred to as a positive curvature when the contour line is formed to be convex, while the curvature of the contour line is referred to as a negative curvature when the contour line is formed to be concave, a negative curvature portion where the curvature of the contour line becomes negative is provided on the runner side vane surface. The negative curvature portion is formed from an upper end portion to a lower end portion of the runner side vane surface.Type: ApplicationFiled: January 19, 2021Publication date: May 13, 2021Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Hideyuki KAWAJIRI, Yoshihiro ISHIKAWA, Hajime KOYAMA, Yukito YADA
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Patent number: 10590904Abstract: A vane body of a guide vane includes a leading edge, and a trailing edge which is located closer to a runner than the leading edge, when located radially outside the runner. A projection extending in a direction from the trailing edge toward the leading edge is provided on an internal-diameter side blade face of the vane body, at least in any one of one side area of the internal-diameter side blade face and the other side area thereof in an axial direction of a guide vane rotation shaft, the internal-diameter side blade face being disposed on a side of the runner. The projection has a projection rear end of an arcuate shape, which projection rear end is formed to extend along a rotation trajectory which is drawn by the trailing edge when the vane body is rotated about the guide vane rotation shaft.Type: GrantFiled: October 11, 2016Date of Patent: March 17, 2020Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Madoka Narikawa, Hideyuki Kawajiri, Norio Ohtake, Koichi Kubo, Toshifumi Kurokawa, Nobuaki Noda
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Publication number: 20190136703Abstract: In a guide vane according to an embodiment of the invention, where in a section perpendicular to a guide vane rotation axis, a curvature of a contour line forming a runner side vane surface of the guide vane is referred to as a positive curvature when the contour line is formed to be convex, while the curvature of the contour line is referred to as a negative curvature when the contour line is formed to be concave, a negative curvature portion where the curvature of the contour line becomes negative is provided on the runner side vane surface. The negative curvature portion is formed from an upper end portion to a lower end portion of the runner side vane surface.Type: ApplicationFiled: November 6, 2018Publication date: May 9, 2019Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Hideyuki KAWAJIRI, Yoshihiro ISHIKAWA, Hajime KOYAMA, Yukito YADA
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Publication number: 20170260958Abstract: A vane body of a guide vane includes a leading edge, and a trailing edge which is located closer to a runner than the leading edge, when located radially outside the runner. A projection extending in a direction from the trailing edge toward the leading edge is provided on an internal-diameter side blade face of the vane body, at least in any one of one side area of the internal-diameter side blade face and the other side area thereof in an axial direction of a guide vane rotation shaft, the internal-diameter side blade face being disposed on a side of the runner. The projection has a projection rear end of an arcuate shape, which projection rear end is formed to extend along a rotation trajectory which is drawn by the trailing edge when the vane body is rotated about the guide vane rotation shaft.Type: ApplicationFiled: October 11, 2016Publication date: September 14, 2017Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Madoka NARIKAWA, Hideyuki KAWAJIRI, Norio OHTAKE, Koichi KUBO, Toshifumi KUROKAWA, Nobuaki NODA
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Patent number: 8944757Abstract: A fluid machine of an embodiment includes a sealing portion formed of an annular minute gap between a runner band of a runner configuring a rotating portion and a sealing liner which is a stationary portion and arranged in opposition to the runner band. A groove having a quadrangular cross-sectional shape is formed circumferentially on a surface of the sealing liner configuring the sealing portion. In a cross section perpendicular to a groove forming direction of the groove, an angle ?, formed between a side WU of the groove on the most upstream side with respect to the flowing direction of the leakage flow and a side W0 of the groove which is on an extended line of the surface of the sealing liner, is determined to be 15° or more and 40° or less.Type: GrantFiled: September 9, 2011Date of Patent: February 3, 2015Assignee: Kabushiki Kaisha ToshibaInventors: Hideyuki Kawajiri, Naritoshi Nakagawa
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Publication number: 20140308119Abstract: A hydraulic machinery 1 comprises: vanes 10 that are circumferentially arranged side by side; and rotatable guide vanes 20 that are arranged inside the respective stay vanes. An outlet end-point 11 of each stay vane is in contact with a common reference circle. Each guide vane includes a pressure side blade surface 21 and a negative-pressure side blade surface 22, and has a camber line connecting centers of inscribed circles 24 that are in contact with both the blade surfaces 21, 22. When each guide vane takes a maximum opening degree, a central point O of a maximum inscribed circle 24m is located on an outlet side of the guide vane, relative to an intersection point 32 at which a line as the shortest distance, which is drawn between the outlet end-point and the negative-pressure side blade surface 22, and the camber line 25 intersect with each other.Type: ApplicationFiled: June 26, 2014Publication date: October 16, 2014Applicant: Kabushiki Kaisha ToshibaInventors: Sho HARADA, Sadao Kurosawa, Hideyuki Kawajiri, Atsuhito Nishimoto