公开(公告)号：US11221013B2

公开(公告)日：2022-01-11

申请号：US16580338

申请日：2019-09-24

Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

Inventor： Yoshiyuki Nakane ,  Takahito Kunieda ,  Kaho Takeuchi ,  Ryo Umeyama ,  Satoru Mitsuda ,  Ryosuke Fukuyama

IPC: F04D29/06 ,  F04D27/00 ,  F04D17/12 ,  F01D25/18 ,  F04D29/10

Abstract: 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.

公开(公告)号：US11174866B1

公开(公告)日：2021-11-16

申请号：US17238888

申请日：2021-04-23

Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

Inventor： Shogo Ito ,  Ryosuke Fukuyama ,  Kaho Takeuchi ,  Daisuke Watanabe ,  Yohei Takase

IPC: F04D17/10 ,  F04D29/053 ,  F04D29/10 ,  F04D29/063

Abstract: 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.

公开(公告)号：US12188474B2

公开(公告)日：2025-01-07

申请号：US18582025

申请日：2024-02-20

Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

Inventor： Masaya Yoshida ,  Daisuke Masaki ,  Ryosuke Fukuyama ,  Katsutoshi Shiromaru

IPC: F04C2/12

Abstract: A roots pump comprising: a rotary shaft; a rotor having a hole-forming surface that forms an insertion hole, and a first bearing and a second bearing. Each of the first bearing and the second bearing includes an inner ring and an outer ring. The rotary shaft is press-fitted in the inner ring of the first bearing, and fitted in the inner ring of the second bearing with a clearance between the rotary shaft and the inner ring of the second bearing. An edge portion of the hole-forming surface adjacent to the first bearing serves as a press-fitting portion in which the rotary shaft is press-fitted, and at least an edge portion of the hole-forming surface adjacent to the second bearing serves as a clearance-fitting portion in which the rotary shaft is fitted with a clearance between the rotary shaft and the clearance-fitting portion.

公开(公告)号：US11448234B2

公开(公告)日：2022-09-20

申请号：US17238856

申请日：2021-04-23

Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

Inventor： Yohei Takase ,  Yoshiyuki Nakane ,  Satoru Mitsuda ,  Hiroaki Kato ,  Ryosuke Fukuyama ,  Daisuke Watanabe ,  Kaho Takeuchi

IPC: F04D17/10 ,  F04D29/42 ,  F04D29/043 ,  F04D29/10 ,  F04D29/22 ,  F04D13/06 ,  F04D29/063 ,  F04D29/08 ,  F04D25/02 ,  F04D25/06

Abstract: 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.

公开(公告)号：US10760584B2

公开(公告)日：2020-09-01

申请号：US15469956

申请日：2017-03-27

Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

Inventor： Ryosuke Fukuyama ,  Kaho Takeuchi

IPC: F04D17/10 ,  F04D29/054 ,  F04D25/06 ,  F04D29/28

Abstract: 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.

公开(公告)号：US11976656B2

公开(公告)日：2024-05-07

申请号：US18121625

申请日：2023-03-15

Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

Inventor： Masaya Yoshida ,  Daisuke Masaki ,  Ryosuke Fukuyama ,  Katsutoshi Shiromaru

IPC: F04C18/12 ,  F01C19/00 ,  F04C18/14 ,  F04C27/00

CPC classification number: 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

Abstract: 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.

公开(公告)号：US09874226B2

公开(公告)日：2018-01-23

申请号：US14666863

申请日：2015-03-24

Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

Inventor： Ryosuke Fukuyama

IPC: F04D29/46 ,  F04D27/02 ,  F04D17/10

CPC classification number: F04D29/464 ,  F04D17/10 ,  F04D27/0253 ,  F05D2220/40

Abstract: 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.

公开(公告)号：US20150275917A1

公开(公告)日：2015-10-01

申请号：US14666863

申请日：2015-03-24

Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

Inventor： Ryosuke Fukuyama

IPC: F04D29/46 ,  F04D27/02 ,  F04D17/10

CPC classification number: F04D29/464 ,  F04D17/10 ,  F04D27/0253 ,  F05D2220/40

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US11131316B2

公开(公告)日：2021-09-28

申请号：US16715360

申请日：2019-12-16

Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

Inventor： Takahito Kunieda ,  Ryosuke Fukuyama ,  Yoshiyuki Nakane

IPC: F04D29/063 ,  F04D29/049 ,  F04D17/10 ,  F04D29/28 ,  F04D25/02 ,  F04D29/059 ,  F04D25/06

Abstract: A centrifugal compressor includes a partition wall that is arranged between a ring member and the bottom of a main body in a speed-increaser chamber. The centrifugal compressor further includes an introduction passage that guides oil in a stirring region to a storage region. The stirring region includes a region between the partition wall and the ring member in the speed-increaser chamber. The storage region includes a region between the partition wall and the bottom of the main body in the speed-increaser chamber. The oil that has been stirred by rotation of the ring member collides the inner circumferential surface of a speed increaser housing before flowing toward the partition wall. The oil is then guided to the storage region via the introduction passage. Since the oil stored in the storage region is unlikely to be stirred by rotation of the ring member, only a small amount of oil is stirred by the ring member.

公开(公告)号：US10767655B2

公开(公告)日：2020-09-08

申请号：US15928945

申请日：2018-03-22

Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

Inventor： Ryosuke Fukuyama ,  Shogo Ito ,  Kaho Takeuchi

IPC: F04D25/02 ,  F04D17/10 ,  F04D29/063 ,  F04D29/059 ,  F04D25/06

Abstract: A centrifugal compressor includes an electric motor coupled to a low-speed shaft, an impeller, and a speed increaser. The speed increaser includes a ring member, a high-speed shaft, rollers, a speed increaser housing member, a discharge passage, and a partition. The ring member includes a circumferential wall and is rotated when the low-speed shaft rotates. The high-speed shaft is coupled to the impeller. The rollers are located between the circumferential wall and the high-speed shaft. The speed increaser housing member stores oil. The discharge passage discharges oil out of the ring member. The partition is located between the speed increaser housing member and the circumferential wall in the radial direction. Power is transmitted from the low-speed shaft to the high-speed shaft by the ring member and the rollers.