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公开(公告)号：US11784517B2
公开(公告)日：2023-10-10
申请号：US17041254
申请日：2018-05-15
摘要： A rotary electric machine includes a housing, a stator disposed in the housing, and at least two support members disposed in at least two different parts, respectively, in an axial direction of the stator between the housing and an outer circumferential surface of the stator, the at least two support members supporting the stator against the housing. The at least two support members, the housing, and the outer circumferential surface of the stator form a space.
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公开(公告)号：US10072707B2
公开(公告)日：2018-09-11
申请号：US15113894
申请日：2014-02-27
发明人： Takaya Futae , Hideaki Nishida
CPC分类号： F16C33/1075 , F01D25/168 , F02B39/00 , F05D2220/40 , F05D2250/182 , F05D2250/183 , F05D2250/191 , F05D2250/292 , F05D2250/611 , F16C17/045 , F16C17/047 , F16C17/18 , F16C33/107 , F16C33/128 , F16C2360/24
摘要： A tapered land thrust bearing device with a land surface having a substantially reduced area without changing the contour shape of the land surface even if the area of the land surface is small, and high mechanical efficiency, as well as a turbocharger provided with the bearing device. A tapered land thrust bearing device includes: a flange portion fitted onto a rotary shaft and including a first thrust portion; and a thrust member including a second thrust portion which is disposed around a through hole and which faces the first thrust portion of the flange portion.
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公开(公告)号：US10526960B2
公开(公告)日：2020-01-07
申请号：US15546854
申请日：2015-09-14
发明人： Yuya Kojima , Takashi Nambu , Naomichi Shibata , Takaya Futae , Shuichi Isayama
摘要： A turbocharger according to an embodiment of the present invention includes a rotating shaft, a compressor, a turbine, a compressor-side floating bearing and a turbine-side floating bearing that rotatably support the rotating shaft, and a bearing housing that houses the compressor-side floating bearing and the turbine-side floating bearing, the bearing housing being internally provided with a turbine-side oil feeding passage through which oil to be fed to the turbine-side floating bearing flows and a compressor-side oil feeding passage through which oil to be fed to the compressor-side floating bearing flows. A ratio of an oil feeding pressure for oil at an outlet of the compressor-side oil feeding passage to an oil feeding pressure for oil at an outlet of the turbine-side oil feeding passage is configured to be higher than 1.0 and lower than 1.5.
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公开(公告)号：US10473207B2
公开(公告)日：2019-11-12
申请号：US15515332
申请日：2014-12-18
发明人： Tadasuke Nishioka , Yosuke Danmoto , Isao Tomita , Takashi Nambu , Yoji Akiyama , Yuya Kojima , Tatsuya Ishizaki , Seigi Yano , Takaya Futae , Motoki Ebisu
摘要： 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. The oil-drain space is configured to guide the lubricant oil flowing through the oil-drain channel to outside the oil-drain space via the oil-drain port, along a flow direction of the lubricant oil flowing through the oil-drain channel from an upstream side toward a downstream side in a rotational direction of the rotor shaft.
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公开(公告)号：US10330152B2
公开(公告)日：2019-06-25
申请号：US15114156
申请日：2014-02-27
摘要： 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. A floating bush bearing device includes: a rotary shaft disposed rotatably inside a bearing hole of a casing; a floating bush surrounding the rotary shaft; an oil-feed hole of lubricant oil having an opening on an inner peripheral surface of the bearing hole; a plurality of communication holes formed on the floating bush, each extending between an inner peripheral surface and an outer peripheral surface of the floating bush, and disposed at intervals in a circumferential direction of the floating bush; and a circumferential groove formed on the outer peripheral surface of the floating bush or the inner peripheral surface of the bearing hole and extending over an entire circumference of the outer peripheral surface of the floating bush or the inner peripheral surface of the bearing hole, the circumferential groove passing through openings of the plurality of communication holes or facing the openings of the plurality of communication holes. The circumferential groove has a cross-sectional area which varies in accordance with a circumferential position.
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公开(公告)号：US10288112B2
公开(公告)日：2019-05-14
申请号：US15541173
申请日：2015-02-10
摘要： A floating-bush bearing device (1) for rotatably supporting a rotational shaft (2), includes: a floating bush (3) having a cylindrical shape and including a bearing hole (33) into which the rotational shaft (2) is to be inserted; and a bearing housing (4) which rotatably houses the floating bush (3). At least one of an inner peripheral surface (31) of the floating bush (3), an outer peripheral surface (32) of the floating bush (3), or an inner peripheral surface (41) of the bearing housing (4) includes, in a cross section in an axial direction thereof, a plurality of land portions (311, 321, 411) having a true arc shape which is a part of a true circular shape, and a plurality of recess portions (312, 322, 412) being disposed at a position recessed from the land portions, the recess portions being configured such that a distance between the recess portions and a virtual true circular line (31a, 32a, 41a) passing through the land portions increases in a direction opposite from a rotational direction of the rotational shaft (2) from end portions (311b, 321b, 411b) of the land portions opposite from the rotational direction of the rotational shaft.
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7.发明授权公开(公告)号：US11208915B2
公开(公告)日：2021-12-28
申请号：US16964830
申请日：2018-01-30
发明人： Tatsuya Ishizaki , Yuta Ishii , Takaya Futae , Noriyuki Hayashi
摘要： A driving device includes: a shaft; and a cylindrical bush having an insertion hole into which the shaft can be inserted. The insertion hole includes an opening portion having an inner diameter decreasing from a first end surface toward a second end surface of the bush, and a small-diameter hole portion extending from an end of the opening portion to the second end surface. The shaft includes a shaft portion having an outer diameter smaller than an inner diameter of the small-diameter hole portion, and an abutment portion having an outer diameter greater than the inner diameter of the small-diameter hole portion. The bush has a sealing surface defining the opening portion. The abutment portion of the shaft abuts on the sealing surface of the bush in an axial direction of the insertion hole to seal a gap formed between the shaft and the bush inside the insertion hole.
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公开(公告)号：US11603772B2
公开(公告)日：2023-03-14
申请号：US16970554
申请日：2018-02-20
发明人： Takuya Arakawa , Takaya Futae , Shuichi Miura , Yosuke Danmoto
摘要： A forced induction device (100) includes: a rotor (1) which includes a turbine side shaft portion (11), a compressor side shaft portion (12), and a connection shaft portion (13) connecting these to each other; a turbine side bearing (5) which supports the turbine side shaft portion (11); and a compressor side bearing (6) which supports the compressor side shaft portion (12). A rigidity of the connection shaft portion (13) is lower than that of the turbine side shaft portion (11) and the compressor side shaft portion (12) so that a node in a mode shape at each critical speed involving with an operating rotational speed region of the rotor (1) is located between the turbine side bearing (5) and the compressor side bearing (6).
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公开(公告)号：US11066983B2
公开(公告)日：2021-07-20
申请号：US16311959
申请日：2017-03-21
发明人： Takaya Futae , Yuta Ishii , Yuya Kojima
IPC分类号： F02B39/14 , F01D25/16 , F01D25/18 , F02B39/00 , F16C17/02 , F16C17/26 , F16C33/10 , F16N7/36 , F16N7/38 , F16N7/40 , F16N13/00 , F16C27/02 , F16C35/02 , F16C17/18 , F01M11/02
摘要： Provided are: a lubricating device for a bearing; and an exhaust turbosupercharger, wherein a bearing device (36) is provided with a housing (15) with a hollow shape, and journal bearings (21, 22) which rotatably support a rotary shaft (14) arranged inside the housing (15), the bearing device (36) being further provided with: a third feeding passage (43) and a fourth feeding passage (44) through which lubricant is fed toward outer circumferential surfaces (21b, 22b) of the journal bearings (21, 22); a sixth feeding passage (46) through which lubricant is fed toward a space section (16A) between the journal bearings (21, 22); and a guide section which guides, toward inner circumferential surfaces (21c, 22c) of the journal bearings (21, 22), the lubricant fed from the sixth feeding passage (46) to the space section (16A).
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公开(公告)号：US10690141B2
公开(公告)日：2020-06-23
申请号：US15110144
申请日：2014-02-25
IPC分类号： F04D29/12 , F02B39/14 , F01D11/00 , F16J15/16 , F16J15/44 , F16J15/3272 , F16J15/24 , F04D29/053 , F04D29/056 , F04D29/28 , F01D25/18 , F02B33/40
摘要： An object is to provide a seal structure capable of reducing abrasion of a seal ring without increasing the number of components and of minimizing generation of abrasion powder. A seal structure to seal clearance between an outer peripheral surface 8a of a rotary shaft 8 and an inner peripheral surface 6a of a bearing housing 6 includes: a first seal groove 22A formed on the outer peripheral surface 8a of the rotary shaft 8; a second seal groove 22B disposed between the first seal groove and the impeller; a first seal ring 26 to be mounted to the first seal groove; and a second seal ring 28 to be mounted to the second seal groove. The first seal ring 26 includes a first-seal body portion 26A mounted to the first seal groove, and a first-seal protruding portion 26B protruding from the first-seal body portion toward the second seal ring 28, and being configured to be in contact with the second seal ring contacting a bearing-side wall surface 22Ba of the second seal groove, in a state in which the first-seal body portion is in contact with a bearing-side wall surface 22Aa of the first seal groove.
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