Patents by Inventor Seiichi Ibaraki
Seiichi Ibaraki 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).
-
Patent number: 11313379Abstract: A centrifugal compressor includes an impeller rotatably disposed and having a plurality of first blades and a shroud cover disposed on a leading edge side of the first blades partially in a rotational axis direction of the impeller and connecting the first blades circumferentially adjacent to each other. The shroud cover is shaped such that a position of at least one of an upstream edge or a downstream edge of the shroud cover in the rotational axis direction changes along a circumferential direction of the shroud cover.Type: GrantFiled: November 6, 2017Date of Patent: April 26, 2022Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Kenichiro Iwakiri, Yoshihiro Hayashi, Seiichi Ibaraki
-
Patent number: 11306613Abstract: A turbocharger (10A) has a back plate (41). The back plate (41) is provided with a plate section (41a) and a flange section (41c) which is formed radially outside the plate section (41a) and which is supported so as to be sandwiched between a bearing housing (16) and a turbine housing (31). The turbocharger (10A) is further provided with a flange heat shielding section (53) provided between the flange section (41c) and the bearing housing (16) and consisting of a material having lower heat conductivity than the turbine housing (31) and the back plate (41).Type: GrantFiled: March 7, 2016Date of Patent: April 19, 2022Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Tsuyoshi Kitamura, Seiichi Ibaraki, Toyotaka Yoshida, Hiroshi Suzuki
-
Publication number: 20210285457Abstract: A surging precursor detecting device is a surge detecting device configured to detect a precursor of a surge of a compressor including a housing portion housing a blade including a rotary blade of an impeller and configured to compress a fluid supplied from an inlet piping portion and discharge the fluid to an outlet piping portion. The surging precursor detecting device includes an acquisition unit configured to acquire time series data of a state quantity having a correlation with internal pressure in at least one position of an inlet piping position, an outlet piping position, and an intermediate position between the inlet piping position and the outlet piping position, an analysis unit configured to perform a chaotic time series analysis on the time series data with the number of embedded dimensions being not less than three, and a detecting unit configured to detect a precursor of the surge.Type: ApplicationFiled: January 14, 2021Publication date: September 16, 2021Inventors: Kenichiro IWAKIRI, Seiichi IBARAKI
-
Patent number: 11041505Abstract: A rotary machine blade (31) equipped with a clearance flow suppression blade section (34), the lean angle of which has one or more inflection points, and which is formed such that when the direction from a positive-pressure surface (31a) to a negative-pressure surface (31b) is taken as the normal direction, an inflection point (P1) of the lean angle positioned farthest toward the blade end (33) changes from the negative to the positive direction in the direction away from the blade end (33).Type: GrantFiled: March 31, 2016Date of Patent: June 22, 2021Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Hironori Honda, Seiichi Ibaraki, Kenichiro Iwakiri, Tadashi Kanzaka
-
Patent number: 11022130Abstract: This turbocharger (1A) is provided with: a rotating shaft (4); a turbine wheel (2); a compressor wheel (3); a bearing housing (6) provided with journal bearings (5A, 5B) for rotatably supporting a shaft (4), and a thrust bearing (8) for supporting the rotating shaft (4) in the center axis (C) direction thereof; and a turbine housing (31) in which the turbine wheel (2) is accommodated. A fluid supply section (70A) for supplying a fluid to the turbine wheel (2) is provided within the turbine housing (31) and said fluid presses the turbine wheel (2) toward a first end (4a) side.Type: GrantFiled: March 30, 2016Date of Patent: June 1, 2021Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Yutaka Fujita, Takao Yokoyama, Seiichi Ibaraki
-
Patent number: 10954816Abstract: A turbocharge includes: a compressor wheel; a turbine wheel configured to rotate with the compressor wheel; a turbine housing disposed so as to cover the turbine wheel; a bearing supporting a rotational shaft of the turbine wheel rotatably; and a bearing housing accommodating the bearing. One of the turbine housing or the bearing housing includes a fin portion protruding toward the other one of the turbine housing or the bearing housing so as to extend along an axial direction of the rotational shaft, and, between the turbine housing and the bearing housing, a cavity is formed on each side of the fin portion with respect to a radial direction of the rotational shaft.Type: GrantFiled: September 28, 2017Date of Patent: March 23, 2021Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Tsuyoshi Kitamura, Seiichi Ibaraki, Toyotaka Yoshida, Hiroshi Suzuki, Motoki Ebisu
-
Publication number: 20200088210Abstract: A rotary machine blade (31) equipped with a clearance flow suppression blade section (34), the lean angle of which has one or more inflection points, and which is formed such that when the direction from a positive-pressure surface (31a) to a negative-pressure surface (31b) is taken as the normal direction, an inflection point (P1) of the lean angle positioned farthest toward the blade end (33) changes from the negative to the positive direction in the direction away from the blade end (33).Type: ApplicationFiled: March 31, 2016Publication date: March 19, 2020Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Hironori HONDA, Seiichi IBARAKI, Kenichiro IWAKIRI, Tadashi KANZAKA
-
Publication number: 20200063749Abstract: A centrifugal compressor includes an impeller rotatably disposed and having a plurality of first blades and a shroud cover disposed on a leading edge side of the first blades partially in a rotational axis direction of the impeller and connecting the first blades circumferentially adjacent to each other. The shroud cover is shaped such that a position of at least one of an upstream edge or a downstream edge of the shroud cover in the rotational axis direction changes along a circumferential direction of the shroud cover.Type: ApplicationFiled: November 6, 2017Publication date: February 27, 2020Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Kenichiro IWAKIRI, Yoshihiro HAYASHI, Seiichi IBARAKI
-
Patent number: 10563515Abstract: A turbine impeller includes: a hub portion coupled to an end of a rotational shaft; a plurality of main blades disposed at intervals on a peripheral surface of the hub portion; and a short blade disposed between two adjacent main blades among the plurality of main blades. An inter-blade flow channel is formed between the two adjacent main blades so that a fluid flows through the inter-blade flow channel from an outer side toward an inner side of the turbine impeller in a radial direction. In a meridional plane, a hub-side end of a leading edge of the short blade is disposed on an inner side, in the radial direction, of a hub-side end of a leading edge of the main blade.Type: GrantFiled: March 26, 2015Date of Patent: February 18, 2020Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Takao Yokoyama, Seiichi Ibaraki, Toyotaka Yoshida
-
Patent number: 10378369Abstract: A turbine is provided with a turbine rotor blade, and a turbine housing having a scroll part extending along a circumferential direction of the turbine rotor blade. The scroll part is configured such that an A/R ratio of a flow passage area A to a distance R between an axis of the turbine rotor blade and a flow passage center of the scroll part has a concave distribution at least in a part of a graph where an abscissa represents a circumferential position around the axis of the turbine rotor blade and an ordinate represents the A/R ratio.Type: GrantFiled: January 5, 2015Date of Patent: August 13, 2019Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Takao Yokoyama, Seiichi Ibaraki, Ricardo Martinez-Botas, Mingyang Yang
-
Publication number: 20190234237Abstract: A turbocharge includes: a compressor wheel; a turbine wheel configured to rotate with the compressor wheel; a turbine housing disposed so as to cover the turbine wheel; a bearing supporting a rotational shaft of the turbine wheel rotatably; and a bearing housing accommodating the bearing. One of the turbine housing or the bearing housing includes a fin portion protruding toward the other one of the turbine housing or the bearing housing so as to extend along an axial direction of the rotational shaft, and, between the turbine housing and the bearing housing, a cavity is formed on each side of the fin portion with respect to a radial direction of the rotational shaft.Type: ApplicationFiled: September 28, 2017Publication date: August 1, 2019Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Tsuyoshi KITAMURA, Seiichi IBARAKI, Toyotaka YOSHIDA, Hiroshi SUZUKI, Motoki EBISU
-
Publication number: 20190154043Abstract: This turbocharger (1A) is provided with: a rotating shaft (4); a turbine wheel (2); a compressor wheel (3); a bearing housing (6) provided with journal bearings (5A, 5B) for rotatably supporting a shaft (4), and a thrust bearing (8) for supporting the rotating shaft (4) in the center axis (C) direction thereof; and a turbine housing (31) in which the turbine wheel (2) is accommodated. A fluid supply section (70A) for supplying a fluid to the turbine wheel (2) is provided within the turbine housing (31) and said fluid presses the turbine wheel (2) toward a first end (4a) side.Type: ApplicationFiled: March 30, 2016Publication date: May 23, 2019Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Yutaka FUJITA, Takao YOKOYAMA, Seiichi IBARAKI
-
Publication number: 20190063260Abstract: A turbocharger (10A) has a back plate (41). The back plate (41) is provided with a plate section (41a) and a flange section (41c) which is formed radially outside the plate section (41a) and which is supported so as to be sandwiched between a bearing housing (16) and a turbine housing (31). The turbocharger (10A) is further provided with a flange heat shielding section (53) provided between the flange section (41c) and the bearing housing (16) and consisting of a material having lower heat conductivity than the turbine housing (31) and the back plate (41).Type: ApplicationFiled: March 7, 2016Publication date: February 28, 2019Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Tsuyoshi KITAMURA, Seiichi IBARAKI, Toyotaka YOSHIDA, Hiroshi SUZUKI
-
Patent number: 10167877Abstract: An object of the present invention is to decrease a surging limit flow rate at a low flow rate time, by increasing the inflow velocity to the blade of the impeller wheel, by providing a resistive element that narrows in the radial direction a passage cross section of an air intake passage which communicates between a impeller wheel of a centrifugal compressor and an air intake opening. The centrifugal compressor includes: the compressor housing 9 having the air intake opening 13 opened in a rotary shaft direction, and the air intake passage 11; and the impeller wheel 7 for compressing the air flowing in from the air intake opening 13, inside the housing.Type: GrantFiled: February 22, 2013Date of Patent: January 1, 2019Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Seiichi Ibaraki, Isao Tomita, Hiroshi Suzuki
-
Patent number: 10148141Abstract: A motor rotor structure for an electric turbo charger is manufactured at low cost with good quality by fixedly fitting, over a shaft, a rotor core having electromagnetic steel sheets pre-formed as an integrated stack. The rotor structure includes a rotor core which is rotated by a magnetic field formed by a stator in a housing; a shaft configured to rotate a compressor impeller and the rotor core together; and a bearing supporting the shaft. The rotor includes the rotor core including the electromagnetic steel sheets; a stopper portion formed at an intermediate portion of the shaft to restrict axial movement of the rotor core; and a pressing unit which presses the rotor core fitted over the shaft against the stopper portion. The pressing unit prevents a circumferential phase shift between the shaft and the rotor core by a pressing force thereof.Type: GrantFiled: June 4, 2012Date of Patent: December 4, 2018Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Yukio Yamashita, Noriyuki Hayashi, Seiichi Ibaraki, Katsuyuki Osako, Motoki Ebisu, Byeongil An, Hiroshi Suzuki, Hideaki Arita, Takashi Goto, Toshihiko Miyake
-
Publication number: 20180266442Abstract: A compressor impeller includes: a hub; and a blade group including a plurality of blades arranged along a circumferential direction on an outer peripheral surface of the hub, the blade group being configured such that hub-side ends of leading edges of the respective blades are aligned on the same circle. The plurality of blades include at least one first blade and at least one second blade having a different shape from the at least one first blade. When comparing a blade angle of a leading edge of the at least one first blade to a blade angle of a leading edge of the at least one second blade at the same position in a radial direction of the compressor impeller, the blade angle of the leading edge of the at least one first blade is different from the blade angle of the leading edge of the at least one second blade, at least in a partial range in the radial direction of the compressor impeller.Type: ApplicationFiled: January 14, 2016Publication date: September 20, 2018Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Kenichiro IWAKIRI, Isao TOMITA, Seiichi IBARAKI
-
Publication number: 20180010464Abstract: A turbine impeller includes: a hub portion coupled to an end of a rotational shaft; a plurality of main blades disposed at intervals on a peripheral surface of the hub portion; and a short blade disposed between two adjacent main blades among the plurality of main blades. An inter-blade flow channel is formed between the two adjacent main blades so that a fluid flows through the inter-blade flow channel from an outer side toward an inner side of the turbine impeller in a radial direction. In a meridional plane, a hub-side end of a leading edge of the short blade is disposed on an inner side, in the radial direction, of a hub-side end of a leading edge of the main blade.Type: ApplicationFiled: March 26, 2015Publication date: January 11, 2018Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Takao YOKOYAMA, Seiichi IBARAKI, Toyotaka YOSHIDA
-
Patent number: 9797320Abstract: An object is to provide an engine system including an intake bypass device whereby it is possible to expand the operation range of a compressor without causing the output of a turbine to become insufficient. An engine system includes an intake bypass device including a bypass channel connecting a downstream side of a compressor of a turbocharger in an intake channel and an upstream side of a turbine of the turbocharger in an exhaust channel, a bypass valve disposed in the bypass channel and configured to control a flow of compressed intake air in the bypass channel, and a heating unit for heating the compressed intake air flowing through the bypass channel.Type: GrantFiled: October 11, 2013Date of Patent: October 24, 2017Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Takao Yokoyama, Seiichi Ibaraki, Isao Tomita, Katsuyuki Osako
-
Publication number: 20160319683Abstract: A turbine is provided with a turbine rotor blade, and a turbine housing having a scroll part extending along a circumferential direction of the turbine rotor blade. The scroll part is configured such that an A/R ratio of a flow passage area A to a distance R between an axis of the turbine rotor blade and a flow passage center of the scroll part has a concave distribution at least in a part of a graph where an abscissa represents a circumferential position around the axis of the turbine rotor blade and an ordinate represents the A/R ratio.Type: ApplicationFiled: January 5, 2015Publication date: November 3, 2016Applicants: MITSUBISHI HEAVY INDUSTRIES, LTD., IMPERIAL INNOVATIONS LTDInventors: Takao YOKOYAMA, Seiichi IBARAKI, Ricardo MARTINEZ-BOTAS, Mingyang YANG
-
Publication number: 20160215712Abstract: An object is to provide an engine system including an intake bypass device whereby it is possible to expand the operation range of a compressor without causing the output of a turbine to become insufficient. An engine system includes an intake bypass device including a bypass channel connecting a downstream side of a compressor of a turbocharger in an intake channel and an upstream side of a turbine of the turbocharger in an exhaust channel, a bypass valve disposed in the bypass channel and configured to control a flow of compressed intake air in the bypass channel, and a heating unit for heating the compressed intake air flowing through the bypass channel.Type: ApplicationFiled: October 11, 2013Publication date: July 28, 2016Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Takao YOKOYAMA, Seiichi IBARAKI, Isao TOMITA, Katsuyuki OSAKO