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公开(公告)号：US11221013B2
公开(公告)日：2022-01-11
申请号：US16580338
申请日：2019-09-24
发明人： Yoshiyuki Nakane , Takahito Kunieda , Kaho Takeuchi , Ryo Umeyama , Satoru Mitsuda , Ryosuke Fukuyama
摘要： A centrifugal compressor includes a low-speed shaft, an impeller, a speed increaser, a housing, a separation wall, a shaft insertion hole, a seal member, an oil pan, an oil supply passage, an oil return passage, and a pressure reduction passage. The impeller is integrally rotated with a high-speed shaft. The housing has therein an impeller chamber accommodating the impeller and a speed increaser chamber accommodating the speed increaser. The centrifugal compressor includes a bypass passage having a first end communicating with the speed increaser chamber and a second end communicating with the oil pan.
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公开(公告)号：US11174866B1
公开(公告)日：2021-11-16
申请号：US17238888
申请日：2021-04-23
发明人： Shogo Ito , Ryosuke Fukuyama , Kaho Takeuchi , Daisuke Watanabe , Yohei Takase
IPC分类号： F04D17/10 , F04D29/053 , F04D29/10 , F04D29/063
摘要： A pressure relief passage includes a first pressure relief passage and a second pressure relief passage. A pressure relief hole is provided in an upper part of the first pressure relief passage in the direction of gravitational force. The second pressure relief passage merges with the first pressure relief passage to form a merging portion. The cross-sectional flow area of a stagnation portion, which is the maximum cross-sectional flow area of the second pressure relief passage, is smaller than the cross-sectional flow area of a connection passage, which is the minimum cross-sectional flow area of the first pressure relief passage.
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公开(公告)号：US11448234B2
公开(公告)日：2022-09-20
申请号：US17238856
申请日：2021-04-23
发明人： Yohei Takase , Yoshiyuki Nakane , Satoru Mitsuda , Hiroaki Kato , Ryosuke Fukuyama , Daisuke Watanabe , Kaho Takeuchi
IPC分类号： F04D17/10 , F04D29/42 , F04D29/043 , F04D29/10 , F04D29/22 , F04D13/06 , F04D29/063 , F04D29/08 , F04D25/02 , F04D25/06
摘要： First and second pressure relief passages extend from an oil pan in a branching manner, and merge with each other to form a merging portion. A pressure relief hole is arranged above the merging portion, and a first pressure relief passage is arranged below the merging portion. The minimum cross-sectional area of the second pressure relief passage is smaller than the minimum cross-sectional area of the first pressure relief passage. The second pressure relief passage includes a bent portion formed by bending the second pressure relief passage. The bent portion is configured to perform gas/liquid separation by crushing bubbles. When reaching the merging portion from the bent portion, oil is returned to the oil pan via the first pressure relief passage. When reaching the merging portion from the bent portion, gas is discharged to the outside of the housing via the pressure relief hole.
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公开(公告)号：US10760584B2
公开(公告)日：2020-09-01
申请号：US15469956
申请日：2017-03-27
发明人： Ryosuke Fukuyama , Kaho Takeuchi
IPC分类号： F04D17/10 , F04D29/054 , F04D25/06 , F04D29/28
摘要： A speed increaser includes a high-speed shaft, an annular peripheral wall surrounding the high-speed shaft and rotatable with a rotation of a low-speed shaft, the peripheral wall having an inner peripheral surface and a projection extending inwardly from the inner peripheral surface in a radial direction of the high-speed shaft, and a roller disposed between the high-speed shaft and the peripheral wall and having an outer peripheral surface that is in contact with both the projection and an outer peripheral surface of the high-speed shaft. A centrifugal compressor includes the speed increaser, an electric motor driving to rotate the low-speed shaft, and an impeller mounted to the high-speed shaft.
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公开(公告)号：US11976656B2
公开(公告)日：2024-05-07
申请号：US18121625
申请日：2023-03-15
CPC分类号： F04C18/126 , F01C19/005 , F04C18/14 , F04C27/002 , F04C27/004 , F04C2210/1055 , F04C2230/602 , F04C2230/91 , F04C2230/92 , F04C2240/20 , F04C2240/30 , F04C2240/40 , F04C2250/20
摘要： A roots pump includes a housing, a rotor chamber, a pair of rotary shafts, and a pair of rotors. The rotor chamber includes a rotor chamber peripheral surface facing a pair of distal end portions of each of the rotors. Each of the pair of the distal end portions includes: a pair of rotor peripheral surfaces facing the rotor chamber peripheral surface with a first radial clearance; and a distal end peripheral surface that is formed between the pair of the rotor peripheral surfaces in the rotational direction and faces the rotor chamber peripheral surface with a second radial clearance greater than the first radial clearance. A width of the rotor chamber peripheral surface facing the distal end peripheral surface in the rotational direction is greater than a sum of a pair of predetermined widths of the rotor chamber peripheral surface facing the pair of the rotor peripheral surfaces.
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公开(公告)号：US09874226B2
公开(公告)日：2018-01-23
申请号：US14666863
申请日：2015-03-24
发明人： Ryosuke Fukuyama
CPC分类号： F04D29/464 , F04D17/10 , F04D27/0253 , F05D2220/40
摘要： A centrifugal compressor includes a housing, an impeller, an annular diffuser passage, and an annular movable member. The diffuser passage is defined in the housing by a shroud-side wall surface and a hub-side wall surface, which face each other. The movable member is configured to be projected from one of the shroud-side wall surface and the hub-side wall surface into the diffuser passage and to be retracted from the diffuser passage. The movable member has a through hole with a passage cross-sectional area smaller than that of the diffuser passage. The other of the shroud-side wall surface and the hub-side wall surface has an abutting portion against which the movable member abuts. When the movable member abuts against the abutting portion, the upstream side and the downstream side of the movable member in the diffuser passage communicate with each other via the through hole.
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公开(公告)号：US20150275917A1
公开(公告)日：2015-10-01
申请号：US14666863
申请日：2015-03-24
发明人： Ryosuke Fukuyama
CPC分类号： F04D29/464 , F04D17/10 , F04D27/0253 , F05D2220/40
摘要： A centrifugal compressor includes a housing, an impeller, an annular diffuser passage, and an annular movable member. The diffuser passage is defined in the housing by a shroud-side wall surface and a hub-side wall surface, which face each other. The movable member is configured to be projected from one of the shroud-side wall surface and the hub-side wall surface into the diffuser passage and to be retracted from the diffuser passage. The movable member has a through hole with a passage cross-sectional area smaller than that of the diffuser passage. The other of the shroud-side wall surface and the hub-side wall surface has an abutting portion against which the movable member abuts. When the movable member abuts against the abutting portion, the upstream side and the downstream side of the movable member in the diffuser passage communicate with each other via the through hole.
摘要翻译： 离心压缩机包括壳体，叶轮，环形扩散器通道和环形可动构件。 扩散通道由壳体侧壁表面和轮毂侧壁表面限定在壳体中。 可动构件被构造成从护罩侧壁表面和轮毂侧壁表面中的一个突出到扩散器通道中并且从扩散器通道缩回。 可动构件具有通孔，通孔的横截面积小于扩散器通道的通道横截面积。 护罩侧壁表面和轮毂侧壁表面中的另一个具有抵靠活动件邻接的邻接部分。 当可动件抵靠抵接部时，扩散通路中的可动件的上游侧和下游侧经由通孔相互连通。
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公开(公告)号：US11473585B2
公开(公告)日：2022-10-18
申请号：US17540972
申请日：2021-12-02
发明人： Ryosuke Fukuyama , Kaho Takeuchi , Yoshiyuki Nakane , Hiroaki Kato , Satoru Mitsuda , Shogo Ito , Yohei Takase , Daisuke Watanabe , Ryo Umeyama , Noriyuki Suzuki
IPC分类号： F04D25/02 , F04D25/06 , F16H57/04 , F04D29/059
摘要： A transmission includes a transmission housing member, a ring portion, a high speed shaft, a third roller, and a third plate bearing, which rotatably supports the third roller. The transmission housing member includes a first supporting surface, which restricts the third roller to a first position, and a second supporting surface, which restricts the third roller to a second position. The third roller is moved within a movement range from the first position to the second position. The movement range includes a specified range in which the third roller is not supported, in a radial direction of the high speed shaft, by the transmission housing member with the third plate bearing in between, but is supported by being held between the ring portion and the high speed shaft.
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公开(公告)号：US11286944B2
公开(公告)日：2022-03-29
申请号：US16287294
申请日：2019-02-27
发明人： Ryosuke Fukuyama , Takahito Kunieda , Satoru Mitsuda , Masahiro Suzuki , Ryo Umeyama , Yoshiyuki Nakane
摘要： An oil passage of a centrifugal compressor includes a first oil passage that communicates with an oil pan and a speed increaser chamber to supply oil to a speed increaser and the seal. A second oil passage communicates with the speed increaser chamber. A third oil passage extends upward in a gravitational direction from an end of the second oil passage. A fourth oil passage extends in a horizontal direction and causes the oil pan and an end of the third oil passage to communicate with each other. A pressure relief passage that communicates with an outside is arranged in at least one of a portion of the fourth oil passage through which a gas layer passes and a portion of the oil pan in which the gas layer is stored.
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公开(公告)号：US10527061B2
公开(公告)日：2020-01-07
申请号：US15462293
申请日：2017-03-17
发明人： Ryosuke Fukuyama , Shogo Ito
摘要： A centrifugal compressor includes a housing that accommodates an impeller. The housing includes a motor housing, a speed-increasing gear housing, and a compressor housing. The compressor housing has a suction port through which air is drawn in. The compressor housing includes a cylindrical main body, a cylindrical boss, and a fitting portion having a shape of a truncated cone. The cylindrical boss projects from the main body. The boss includes an injection port for spraying water that is generated through power generation by a fuel cell to air flowing through the suction port toward an impeller chamber.
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