Patents by Inventor Tadasuke Nishioka
Tadasuke Nishioka 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: 11193528Abstract: A bearing pad for a tilting-pad bearing includes a first member having a bearing surface and a second member disposed on a back surface side of the first member. At least one of a back surface of the first member or a front surface of the second member facing the back surface of the first member has a recess for forming a cavity between the first member and the second member. Preferably, the bearing pad further includes a support member disposed on a back surface side of the second member and tiltably supporting the first member and the second member, and the recess is formed over at least a part of an installation range of the support member in a plan view of the bearing pad.Type: GrantFiled: February 1, 2018Date of Patent: December 7, 2021Assignee: MITSUBISHI POWER, LTD.Inventors: Chihiro Yoshimine, Tanehiro Shinohara, Tadasuke Nishioka, Shimpei Yokoyama, Takuzo Shigihara
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Patent number: 10962051Abstract: A support part supports a bearing pad from an outer circumferential side so as to be swingable at a pivot position. A radius of curvature of a rotary shaft is Rj, a radius of curvature of a pad surface is Rp, and a radius of curvature of a reference circle centered at an axial line and having a radius equal to a distance between a center and the pivot position on the pad surface is Rb, and a relationship of Rj<Rp<Rb is established.Type: GrantFiled: September 6, 2017Date of Patent: March 30, 2021Assignee: MITSUBISHI POWER, LTD.Inventors: Shimpei Yokoyama, Tadasuke Nishioka, Chihiro Yoshimine, Yuichiro Waki, Yuki Sumi
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Patent number: 10907681Abstract: A pad bearing includes a pad disposed on a radially outer side of a rotary shaft and supporting the rotary shaft so as to be rotatable around an axis, a block-shaped nozzle member disposed on an upstream side with respect to the pad on the radially outer side of the rotary shaft and including a discharge hole for discharging a lubricant toward an outer peripheral surface of the rotary shaft, and a compressed flow forming unit disposed in at least one of the pad and the nozzle member and configured to compress a flow of the lubricant flowing along the outer peripheral surface of the rotary shaft as the rotary shaft rotates.Type: GrantFiled: March 5, 2019Date of Patent: February 2, 2021Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Eiji Konishi, Shimpei Yokoyama, Chihiro Yoshimine, Tadasuke Nishioka, Shuichi Isayama
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Publication number: 20200392986Abstract: A bearing pad for a tilting-pad bearing includes a first member having a bearing surface and a second member disposed on a back surface side of the first member. At least one of a back surface of the first member or a front surface of the second member facing the back surface of the first member has a recess for forming a cavity between the first member and the second member. Preferably, the bearing pad further includes a support member disposed on a back surface side of the second member and tiltably supporting the first member and the second member, and the recess is formed over at least a part of an installation range of the support member in a plan view of the bearing pad.Type: ApplicationFiled: February 1, 2018Publication date: December 17, 2020Inventors: Chihiro YOSHIMINE, Tanehiro SHINOHARA, Tadasuke NISHIOKA, Shimpei YOKOYAMA, Takuzo SHIGIHARA
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Publication number: 20200232502Abstract: A support part supporting a bearing pad (60) from an outer circumferential side so as to be swingable at a pivot position (P2) is provided. When the radius of curvature of a rotary shaft (10) is Rj, the radius of curvature of a pad surface (62) is Rp, and the radius of curvature of a reference circle (S) centered at an axial line (O) and having a radius equal to the distance between the center (O) and the pivot position (P2) on the pad surface (62) is Rb, the relationship of Rj<Rp<Rb is established.Type: ApplicationFiled: September 6, 2017Publication date: July 23, 2020Inventors: Shimpei YOKOYAMA, Tadasuke NISHIOKA, Chihiro YOSHIMINE, Yuichiro WAKI, Yuki SUMI
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Patent number: 10605302Abstract: A tilting pad gas bearing includes: a plurality of bearing pads disposed in a circumferential direction of a rotor; and a pivot member that swingably supports the bearing pads. Each of the bearing pads has a curved shape and includes: a pad main body supported by the pivot member; a heat insulating material layer disposed on a side of the pad main body that faces the outer circumferential surface of the rotor, and formed of a material having a thermal conductivity lower than a thermal conductivity of the pad main body; and a concave portion disposed in an outer circumferential surface on an outer circumferential side of the bearing pad in a curving direction. A base end of the pivot member is fixed to a housing, and the pivot member has a protruding portion that passes through the housing.Type: GrantFiled: December 26, 2016Date of Patent: March 31, 2020Assignee: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATIONInventors: Takuzo Shigihara, Noriyuki Hayashi, Tadasuke Nishioka, Hideki Nagao
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Patent number: 10605160Abstract: A turbomachine includes: a rotational shaft; a pair of thrust collars disposed around the rotational shaft; a thrust bearing disposed around the rotational shaft at an axial directional position between the pair of thrust collars; and an oil-drain channel disposed around the rotational shaft, for draining lubricant oil after lubricating a sliding portion between the thrust bearing and the thrust collars. The oil-drain channel includes: an oil-drain port portion for discharging the lubricant oil inside the oil-drain channel downward; and an oil-guide channel portion disposed above the oil-drain port portion and configured to guide the lubricant oil from the sliding portion in a circumferential direction of the rotational shaft to the oil-drain port portion.Type: GrantFiled: November 17, 2014Date of Patent: March 31, 2020Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Takaya Futae, Yosuke Danmoto, Tadasuke Nishioka, Yoji Akiyama
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Patent number: 10473207Abstract: An oil-drain device for a thrust bearing includes: a rotor shaft; a collar member mounted to an outer periphery of the rotor shaft; a thrust bearing supporting the rotor shaft in an axial direction; and an oil-drain space forming member defining an oil-drain space through which lubricant oil leaking from a sliding portion of the thrust bearing flows, between the thrust bearing and the oil-drain space forming member. The oil-drain space includes: an oil-drain channel defined between a first end surface of the thrust bearing and a first end surface of the oil-drain space forming member, surrounding the flange portion of the collar member; and an oil-drain port formed below the oil-drain channel, for discharging the lubricant oil flowing through the oil-drain channel outside the oil-drain space.Type: GrantFiled: December 18, 2014Date of Patent: November 12, 2019Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Tadasuke Nishioka, Yosuke Danmoto, Isao Tomita, Takashi Nambu, Yoji Akiyama, Yuya Kojima, Tatsuya Ishizaki, Seigi Yano, Takaya Futae, Motoki Ebisu
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Publication number: 20190277338Abstract: A pad bearing includes a pad disposed on a radially outer side of a rotary shaft and supporting the rotary shaft so as to be rotatable around an axis, a block-shaped nozzle member disposed on an upstream side with respect to the pad on the radially outer side of the rotary shaft and including a discharge hole for discharging a lubricant toward an outer peripheral surface of the rotary shaft, and a compressed flow forming unit disposed in at least one of the pad and the nozzle member and configured to compress a flow of the lubricant flowing along the outer peripheral surface of the rotary shaft as the rotary shaft rotates.Type: ApplicationFiled: March 5, 2019Publication date: September 12, 2019Inventors: Eiji KONISHI, Shimpei YOKOYAMA, Chihiro YOSHIMINE, Tadasuke NISHIOKA, Shuichi ISAYAMA
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Patent number: 10330152Abstract: An object is to provide a floating bush bearing device including a circumferential groove over the entire circumference of an outer peripheral surface of a floating bush while ensuring that a pressing force is applied by lubricant oil to the floating bush to reduce oscillation, as well as a turbocharger provided with the bearing device.Type: GrantFiled: February 27, 2014Date of Patent: June 25, 2019Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Takaya Futae, Tadasuke Nishioka, Takashi Nambu, Noriyuki Hayashi, Hiroshi Suzuki
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Publication number: 20190078509Abstract: The present invention relates to a bearing device comprising: a rotating shaft (14); journal bearings (21, 22) in each of which the outer circumferential surface and the inner circumferential surface do not communicate with one another, the journal bearings being provided to the rotating shaft (14) and rotatably supporting the rotating shaft (14) at at least two sites in the axial direction; a bearing housing (16) that forms a space (16A) for housing the journal bearings (21, 22); a third supply passage (43) and a fourth supply passage (44) which are outer circumferential surface-side lubricating oil supply passages that respectively communicate, in the space (16A), with locations of the outer circumferential surface of the respective journal bearings (21, 22); and a sixth supply passage (46) which is an intermediate-section lubricating oil supply passage that communicates, in the space (16A), with a location between the journal bearings (21, 22).Type: ApplicationFiled: March 1, 2016Publication date: March 14, 2019Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Takaya FUTAE, Takashi NAMBU, Tatsuya ISHIZAKI, Yuya KOJIMA, Tadasuke NISHIOKA
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Publication number: 20190010977Abstract: A tilting pad gas bearing includes: a plurality of bearing pads disposed in a circumferential direction of a rotor; and a pivot member that swingably supports the bearing pads. Each of the bearing pads has a curved shape and includes: a pad main body supported by the pivot member; a heat insulating material layer disposed on a side of the pad main body that faces the outer circumferential surface of the rotor, and formed of a material having a thermal conductivity lower than a thermal conductivity of the pad main body; and a concave portion disposed in an outer circumferential surface on an outer circumferential side of the bearing pad in a curving direction. A base end of the pivot member is fixed to a housing, and the pivot member has a protruding portion that passes through the housing.Type: ApplicationFiled: December 26, 2016Publication date: January 10, 2019Applicant: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATIONInventors: Takuzo Shigihara, Noriyuki Hayashi, Tadasuke Nishioka, Hideki Nagao
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Patent number: 9897137Abstract: A rotary machine is provided with: a flange section protruding in the radial direction of a rotating shaft which rotates about an axis and rotating together with the rotating shaft; a stationary bush disposed at a distance in the direction of the axis from the flange section, surrounding the outer peripheral surface of the rotating shaft, and provided in a housing supporting the rotating shaft so as to be immovable in the direction of the axis relative to the rotating shaft; and a rotation bush which is disposed between the flange section and the stationary bush so as to be sandwiched there between in the direction of the axis, covers the outer peripheral surface of the rotating shaft, and is rotatable relative to the rotating shaft and the housing while floating in fluid. The rotation bush has, on the surface thereof which faces the direction of the axis, a land surface and a tapered surface which is continuous with the land surface.Type: GrantFiled: August 28, 2014Date of Patent: February 20, 2018Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Yuya Kojima, Tadasuke Nishioka, Takaya Futae, Motoki Ebisu, Takashi Nambu
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Publication number: 20170276233Abstract: An oil-drain device for a thrust bearing includes: a rotor shaft; a collar member mounted to an outer periphery of the rotor shaft; a thrust bearing supporting the rotor shaft in an axial direction; and an oil-drain space forming member defining an oil-drain space through which lubricant oil leaking from a sliding portion of the thrust bearing flows, between the thrust bearing and the oil-drain space forming member. The oil-drain space includes: an oil-drain channel defined between a first end surface of the thrust bearing and a first end surface of the oil-drain space forming member, surrounding the flange portion of the collar member; and an oil-drain port formed below the oil-drain channel, for discharging the lubricant oil flowing through the oil-drain channel outside the oil-drain space.Type: ApplicationFiled: December 18, 2014Publication date: September 28, 2017Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Tadasuke NISHIOKA, Yosuke DANMOTO, Isao TOMITA, Takashi NAMBU, Yoji AKIYAMA, Yuya KOJIMA, Tatsuya ISHIZAKI, Seigi YANO, Takaya FUTAE, Motoki EBISU
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Publication number: 20170234213Abstract: A turbomachine includes: a rotational shaft; a pair of thrust collars disposed around the rotational shaft; a thrust bearing disposed around the rotational shaft at an axial directional position between the pair of thrust collars; and an oil-drain channel disposed around the rotational shaft, for draining lubricant oil after lubricating a sliding portion between the thrust bearing and the thrust collars. The oil-drain channel includes: an oil-drain port portion for discharging the lubricant oil inside the oil-drain channel downward; and an oil-guide channel portion disposed above the oil-drain port portion and configured to guide the lubricant oil from the sliding portion in a circumferential direction of the rotational shaft to the oil-drain port portion.Type: ApplicationFiled: November 17, 2014Publication date: August 17, 2017Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Takaya FUTAE, Yosuke DANMOTO, Tadasuke NISHIOKA, Yoji AKIYAMA
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Publication number: 20170211616Abstract: A rotary machine is provided with: a flange section protruding in the radial direction of a rotating shaft which rotates about an axis and rotating together with the rotating shaft; a stationary bush disposed at a distance in the direction of the axis from the flange section, surrounding the outer peripheral surface of the rotating shaft, and provided in a housing supporting the rotating shaft so as to be immovable in the direction of the axis relative to the rotating shaft; and a rotation bush which is disposed between the flange section and the stationary bush so as to be sandwiched there between in the direction of the axis, covers the outer peripheral surface of the rotating shaft, and is rotatable relative to the rotating shaft and the housing while floating in fluid. The rotation bush has, on the surface thereof which faces the direction of the axis, a land surface and a tapered surface which is continuous with the land surface.Type: ApplicationFiled: August 28, 2014Publication date: July 27, 2017Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Yuya KOJIMA, Tadasuke NISHIOKA, Takaya FUTAE, Motoki EBISU, Takashi NAMBU
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Patent number: 9618036Abstract: A tilting-pad bearing for rotatably supporting a rotor includes: a casing; and a plurality of bearing pads each mounted to the casing pivotably about a pivot. Each of the plurality of bearing pads has a bearing pad surface facing the rotor, the bearing pad surface including a first region disposed on an upstream side in a rotational direction of the rotor and having a first curvature radius, and a second region disposed on a downstream side of the first region in the rotational direction and having a second curvature radius smaller than the first curvature radius.Type: GrantFiled: January 27, 2015Date of Patent: April 11, 2017Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventor: Tadasuke Nishioka
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Publication number: 20170009810Abstract: An object is to provide a floating bush bearing device including a circumferential groove over the entire circumference of an outer peripheral surface of a floating bush while ensuring that a pressing force is applied by lubricant oil to the floating bush to reduce oscillation, as well as a turbocharger provided with the bearing device.Type: ApplicationFiled: February 27, 2014Publication date: January 12, 2017Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Takaya FUTAE, Tadasuke NISHIOKA, Takashi NAMBU, Noriyuki HAYASHI, Hiroshi SUZUKI
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Patent number: 9512879Abstract: An object is to provide a tilting-pad bearing device whereby it is possible to levitate a rotation shaft with a low supply-oil pressure. A tilting-pad bearing device includes a plurality of bearing pads disposed around a rotation shaft so as to support the rotation shaft rotatably, a support member interposed between the plurality of bearing pads and a bearing housing supporting the plurality of bearing pads, the support member supporting each of the plurality of bearing pads pivotably, and an oil-supply mechanism configured to supply a lubricant oil to at least one oil groove formed on a bearing surface of at least one of the plurality of bearing pads. The at least one oil groove is disposed inside and outside a contact area of the bearing surface which is in contact with an outer circumferential surface of the rotation shaft when the rotation shaft is stopped.Type: GrantFiled: November 12, 2015Date of Patent: December 6, 2016Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Tadasuke Nishioka, Yuki Sumi
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Patent number: 9371857Abstract: An object is to provide a tilting-pad bearing device whereby it is possible to levitate a rotation shaft with a low supply-oil pressure. A tilting-pad bearing device includes a plurality of bearing pads disposed around a rotation shaft so as to support the rotation shaft rotatably, a support member interposed between the plurality of bearing pads and a bearing housing supporting the plurality of bearing pads, the support member supporting each of the plurality of bearing pads pivotably, and an oil-supply mechanism configured to supply a lubricant oil to at least one oil groove formed on a bearing surface of at least one of the plurality of bearing pads. The at least one oil groove is disposed inside and outside a contact area of the bearing surface which is in contact with an outer circumferential surface of the rotation shaft when the rotation shaft is stopped.Type: GrantFiled: November 12, 2015Date of Patent: June 21, 2016Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Tadasuke Nishioka, Yuki Sumi