Patents by Inventor Hideo Nishida
Hideo Nishida 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: 20240102924Abstract: A diagnostic optical microscope according to the present embodiment includes at least one laser light source (11) configured to generate laser light for illuminating a sample (40) containing a light absorbing material, a lens configured to focus the laser light to be focused on the sample (40), scanning means for changing a focusing position of the laser light on the sample (40), and a light detector (31) configured to detect laser light transmitted through the sample (40) as signal light. A laser light intensity is changed to obtain a nonlinear region in which the laser light intensity and a signal light intensity have a nonlinear relation due to occurrence of saturation of absorption in the light absorbing material when the laser light intensity is maximized. An image is generated based on a nonlinear component of the signal light based on the saturation of absorption in the light absorbing material.Type: ApplicationFiled: January 19, 2022Publication date: March 28, 2024Inventors: Katsumasa FUJITA, Kentaro NISHIDA, Hikaru SATO, Hideo TANAKA, Yoshinori Harada
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Patent number: 9976552Abstract: A performance prediction device includes: an actual measured data obtaining unit that obtains actual measured data of a compressor; a test gas physical property correction formula database in which test gas physical property correction formulae are stored; a test parameter calculation unit that calculates test parameters of the compressor; and a test parameter correction unit that selects at least one of the test gas physical property correction formulae from the test gas physical property correction formula database based on types and a mix ratio of gases included in a test gas to be used in the prediction and corrects the test parameters by using the selected test gas physical property correction formula.Type: GrantFiled: April 21, 2016Date of Patent: May 22, 2018Assignee: HITACHI, LTD.Inventors: Manabu Yagi, Hideo Nishida, Haruo Miura, Kazutoshi Yanagihara
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Publication number: 20160312776Abstract: A performance prediction device includes: an actual measured data obtaining unit that obtains actual measured data of a compressor; a test gas physical property correction formula database in which test gas physical property correction formulae are stored; a test parameter calculation unit that calculates test parameters of the compressor; and a test parameter correction unit that selects at least one of the test gas physical property correction formulae from the test gas physical property correction formula database based on types and a mix ratio of gases included in a test gas to be used in the prediction and corrects the test parameters by using the selected test gas physical property correction formula.Type: ApplicationFiled: April 21, 2016Publication date: October 27, 2016Applicant: HITACHI, LTD.Inventors: Manabu YAGI, Hideo NISHIDA, Haruo MIURA, Kazutoshi YANAGIHARA
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Publication number: 20160238019Abstract: A centrifugal compressor 200 used in a gas pipeline 1 has a centrifugal impeller provided with a hub and a plurality of blades. The blade angle distribution of the blade is configured such that a hub side blade angle is maximum on the side closer to a hub side leading edge than a central point of a hub side camber line, and from this part to the hub side leading edge, a hub side blade angle distribution curve is convex in a blade angle increasing direction.Type: ApplicationFiled: September 11, 2014Publication date: August 18, 2016Applicant: HITACHI, LTD.Inventors: Hiromi KOBAYASHI, Kiyotaka HIRADATE, Kazuyuki SUGIMURA, Toshio ITO, Hideo NISHIDA
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Patent number: 9157450Abstract: An impeller includes a hub plate and a plurality of blades circumferentially disposed at intervals on one surface side of the hub plate. Each blade has a shape formed by piling up a plurality of blade sections in a blade height-wise direction of each blade in a reference impeller in which the hub plate intersects with the blades and which includes a linear element blade in the blade height-wise direction so as to form a curvilinear element blade. In piling up the blade sections, amounts of tangential lean and sweep to be applied to the blade sections are increased as it goes from an end face of at least one of a hub plate side end and a counter hub plate side end toward a span intermediate part of the blade.Type: GrantFiled: April 3, 2012Date of Patent: October 13, 2015Assignee: HITACHI, LTD.Inventors: Kazuyuki Sugimura, Hideo Nishida, Hiromi Kobayashi, Toshio Ito
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Patent number: 8616843Abstract: Turbo machinery comprising an impeller and a diffuser positioned on a downstream side of the impeller that a channel wall surface of the diffuser is composed of a pair of a shroud side diffuser plate and a hub side diffuser plate which surface each other and a channel width is formed so as to be increased downstream, characterized in that guide vanes in a circular arc shape lower in height than the channel width are installed in a line of a plurality of vanes on both channel walls of the shroud side diffuser plate and hub side diffuser plate of the diffuser, and a total of vane heights of the two guide vanes at an outlet of the diffuser is set so as to be within a range from 30 to 70% of the channel width at the outlet of the diffuser.Type: GrantFiled: October 19, 2010Date of Patent: December 31, 2013Assignee: Hitachi Plant Technologies, Ltd.Inventors: Takanori Shibata, Manabu Yagi, Hideo Nishida, Hiromi Kobayashi, Masanori Tanaka
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Publication number: 20130309082Abstract: A plurality of vaned diffusers is disposed on a concentric plate at intervals in a circumferential direction thereof, and each of the diffusers is a curvilinear element three-dimensional diffuser having blades which are extended from a hub side of a impeller to a shroud side thereof. The blades are formed in a form in which a blade serving as a reference is stacked in a direction of the height of the blade, which is a direction of a gap between the hub and the shroud. A dihedral distribution in which moving in a direction perpendicular to a chord direction linking a leading edge of the blade as the reference with a tailing edge thereof, is set as a positive movement is non-uniform from an end portion on the hub side to an intermediate portion of the height of the blade.Type: ApplicationFiled: December 1, 2011Publication date: November 21, 2013Inventors: Kazuyuki Sugimura, Hideo Nishida, Hiromi Kobayashi, Toshio Ito
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Publication number: 20130259644Abstract: A multi-stage impeller is configured in a multi-stage centrifugal compressor by fixing and attaching a plurality of centrifugal impellers to one rotating shaft. Diffusers and return channels are provided in order downstream from each impeller. The centrifugal impellers, the diffusers and the return channel are housed within a compressor casing. The return channels have a plurality of vanes positioned at intervals from one another in a circumferential direction, and at least two stages are provided. The vane exit angles monotonically increase toward the downstream stage.Type: ApplicationFiled: October 17, 2011Publication date: October 3, 2013Inventors: Hiromi Kobayashi, Hideo Nishida, Kazuyuki Sugimura, Manabu Yagi
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Patent number: 8475131Abstract: A centrifugal compressor provided with an impeller which is configured to have a plurality of blades arranged at a predetermined interval in a circumferential direction of a hub rotating together with a rotation shaft, in which a blade angle on a shroud side of the blade distributes to have a minimum value at a position between a leading edge of the blade and a midpoint of a camber line on the shroud side, and a maximum value at a position between the midpoint of the camber line on the shroud side and a trailing edge of the blade, and a blade angle of the blade on a hub side distributes so as to have a maximum value at a position between a leading edge and a midpoint of a camber line on the hub side.Type: GrantFiled: November 20, 2009Date of Patent: July 2, 2013Assignee: Hitachi Plant Technologies, Ltd.Inventors: Takanori Shibata, Manabu Yagi, Hideo Nishida, Hiromi Kobayashi, Masanori Tanaka, Tetsuya Kuwano
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Patent number: 8313290Abstract: In a high pressure centrifugal compressor, the occurrence of rotating stall noticeable in a comparatively-low specific speed wheel stage is prevented, thereby high efficient fluid performance is obtained and reliability is improved. The centrifugal compressor has a first vaneless diffuser with a constant flow channel height on the downstream side of an impeller, and a second vaneless diffuser in which the flow channel height decreases in a flow direction from an inlet to an outlet on the downstream side of the first vaneless diffuser. These diffusers are combined with an impeller using thick blades.Type: GrantFiled: June 22, 2009Date of Patent: November 20, 2012Assignee: Hitachi Plant Technologies, Ltd.Inventors: Masanori Tanaka, Hideo Nishida, Hiromi Kobayashi, Tetsuya Kuwano, Toshio Itou
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Patent number: 8308420Abstract: A centrifugal compressor is equipped with an impeller having a blade angle distribution that makes it possible to achieve a relatively wide operating range. The blade angle of a shroud side facing a circular plate of a blade is termed a first angle and a blade angle of a hub side disposed at the circular plate is a second. The shroud side is formed in a curved shape having an angle distribution from a front area in a shaft direction toward a centrifugal direction in which the first angle is the local maximum point before a substantially middle portion and the local minimum point after the substantially middle point. The hub side is formed in a curved shape having an angle distribution from the front area in the shaft direction toward the centrifugal direction in which the second angle is the maximum local point before the substantially middle portion.Type: GrantFiled: July 31, 2008Date of Patent: November 13, 2012Assignee: Hitachi Plant Technologies, Ltd.Inventors: Manabu Yagi, Tadaharu Kishibe, Takanori Shibata, Hideo Nishida, Hiromi Kobayashi, Tetsuya Kuwano
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Publication number: 20120263599Abstract: An impeller includes a hub plate and a plurality of blades circumferentially disposed at intervals on one surface side of the hub plate. Each blade has a shape formed by piling up a plurality of blade sections in a blade height-wise direction of each blade in a reference impeller in which the hub plate intersects with the blades and which includes a linear element blade in the blade height-wise direction so as to form a curvilinear element blade. In piling up the blade sections, amounts of tangential lean and sweep to be applied to the blade sections are increased as it goes from an end face of at least one of a hub plate side end and a counter hub plate side end toward a span intermediate part of the blade.Type: ApplicationFiled: April 3, 2012Publication date: October 18, 2012Inventors: Kazuyuki SUGIMURA, Hideo Nishida, Hiromi Kobayashi, Toshio Ito
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Patent number: 8287236Abstract: A multistage centrifugal compressor includes a rotary shaft, and multistage impellers attached to the rotary shaft. Each of the impellers includes a hub, a shroud and blades therebetween in a radial cascade arrangement. An annular suction passage for guiding the fluid flow from the inward radial direction to a blade inlet is disposed upstream of the centrifugal impeller. A diffuser is disposed downstream of the centrifugal impeller. A bend portion is disposed downstream of the diffuser, and a return channel with a guide blade portion is disposed downstream of the bend portion. The annular suction passage at a hub side includes an axial parallel portion.Type: GrantFiled: May 8, 2008Date of Patent: October 16, 2012Assignee: Hitachi Plant Technologies, Ltd.Inventors: Hideo Nishida, Hiromi Kobayashi, Masanori Tanaka, Tadaharu Kishibe, Manabu Yagi, Tetsuya Kuwano
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Patent number: 8267644Abstract: In a multistage centrifugal compressor, a plurality of impellers is attached to the same rotary shaft. Vaned Diffusers and vaneless diffusers are used, as diffusers, for respective compressor stages configuring the compressor. The vaned diffusers are continuously used from the first compressor stage to the middle compressor stage, and the vaneless diffusers are used for the last compressor stage and the previous stage. While high efficiency is maintained at the compressor stages having the vaned diffusers, an operating flow range is secured at the compressor stages having the vaneless diffusers.Type: GrantFiled: July 29, 2009Date of Patent: September 18, 2012Assignee: Hitachi Plant Technologies, Ltd.Inventors: Hideo Nishida, Hiromi Kobayashi, Masanori Tanaka, Tetsuya Kuwano, Toshio Itou, Takanori Shibata, Manabu Yagi
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Publication number: 20110097203Abstract: Turbo machinery comprising an impeller and a diffuser positioned on a downstream side of the impeller that a channel wall surface of the diffuser is composed of a pair of a shroud side diffuser plate and a hub side diffuser plate which surface each other and a channel width is formed so as to be increased downstream, characterized in that guide vanes in a circular arc shape lower in height than the channel width are installed in a line of a plurality of vanes on both channel walls of the shroud side diffuser plate and hub side diffuser plate of the diffuser, and a total of vane heights of the two guide vanes at an outlet of the diffuser is set so as to be within a range from 30 to 70% of the channel width at the outlet of the diffuser.Type: ApplicationFiled: October 19, 2010Publication date: April 28, 2011Inventors: Takanori SHIBATA, Manabu YAGI, Hideo NISHIDA, Hiromi KOBAYASHI, Masanori TANAKA
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Publication number: 20100129224Abstract: A centrifugal compressor provided with an impeller which is configured to have a plurality of blades arranged at a predetermined interval in a circumferential direction of a hub rotating together with a rotation shaft, in which a blade angle on a shroud side of the blade distributes to have a minimum value at a position between a leading edge of the blade and a midpoint of a camber line on the shroud side, and a maximum value at a position between the midpoint of the camber line on the shroud side and a trailing edge of the blade, and a blade angle of the blade on a hub side distributes so as to have a maximum value at a position between a leading edge and a midpoint of a camber line on the hub side.Type: ApplicationFiled: November 20, 2009Publication date: May 27, 2010Inventors: Takanori SHIBATA, Manabu Yagi, Hideo Nishida, Hiromi Kobayashi, Masanori Tanaka, Tetsuya Kuwano
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Publication number: 20100028141Abstract: In a multistage centrifugal compressor, a plurality of impellers is attached to the same rotary shaft. Vaned Diffusers and vaneless diffusers are used, as diffusers, for respective compressor stages configuring the compressor. The vaned diffusers are continuously used from the first compressor stage to the middle compressor stage, and the vaneless diffusers are used for the last compressor stage and the previous stage. While high efficiency is maintained at the compressor stages having the vaned diffusers, an operating flow range is secured at the compressor stages having the vaneless diffusers.Type: ApplicationFiled: July 29, 2009Publication date: February 4, 2010Applicant: Hitachi Plant Technologies, Ltd.Inventors: Hideo NISHIDA, Hiromi Kobayashi, Masanori Tanaka, Tetsuya Kuwano, Toshio Itou, Takanori Shibata, Manabu Yagi
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Publication number: 20090317248Abstract: In a high pressure centrifugal compressor, the occurrence of rotating stall noticeable in a comparatively-low specific speed wheel stage is prevented, thereby high efficient fluid performance is obtained and reliability is improved. The centrifugal compressor has a first vaneless diffuser with a constant flow channel height on the downstream side of an impeller, and a second vaneless diffuser in which the flow channel height decreases in a flow direction from an inlet to an outlet on the downstream side of the first vaneless diffuser. These diffusers are combined with an impeller using thick blades.Type: ApplicationFiled: June 22, 2009Publication date: December 24, 2009Applicant: Hitachi Plant Technologies, Ltd.Inventors: Masanori Tanaka, Hideo Nishida, Hiromi Kobayashi, Tetsuya Kuwano, Toshio Itou
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Publication number: 20090035122Abstract: A centrifugal compressor is equipped with an impeller having a blade angle distribution that makes it possible to achieve a relatively wide operating range. The blade angle of a shroud side facing a circular plate of a blade is termed a first angle and a blade angle of a hub side disposed at the circular plate is a second angle. The shroud side is formed in a curved shape having an angle distribution from a front area in a shaft direction toward a centrifugal direction in which the first angle is the local maximum point before a substantially middle portion and the local minimum point after the substantially middle point. The hub side is formed in a curved shape having an angle distribution from the front area in the shaft direction toward the centrifugal direction in which the second angle is the maximum local point before the substantially middle portion.Type: ApplicationFiled: July 31, 2008Publication date: February 5, 2009Inventors: Manabu YAGI, Tadaharu Kishibe, Takanori Shibata, Hideo Nishida, Hiromi Kobayashi, Tetsuya Kuwano
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Publication number: 20080279680Abstract: A multistage centrifugal compressor includes a rotary shaft, and multistage impellers attached to the rotary shaft. Each of the impellers includes a hub, a shroud and blades therebetween in a radial cascade arrangement. An annular suction passage for guiding the fluid flow from the inward radial direction to a blade inlet is disposed upstream of the centrifugal impeller. A diffuser is disposed downstream of the centrifugal impeller. A bend portion is disposed downstream of the diffuser, and a return channel with a guide blade portion is disposed downstream of the bend portion. The annular suction passage at a hub side includes an axial parallel portion.Type: ApplicationFiled: May 8, 2008Publication date: November 13, 2008Applicant: Hitachi Plant Technologies, Ltd.Inventors: Hideo NISHIDA, Hiromi KOBAYASHI, Masanori TANAKA, Tadaharu KISHIBE, Manabu YAGI, Tetsuya KUWANO