WO2024143021A1 - Compresseur centrifuge - Google Patents

Compresseur centrifuge Download PDF

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Publication number
WO2024143021A1
WO2024143021A1 PCT/JP2023/045179 JP2023045179W WO2024143021A1 WO 2024143021 A1 WO2024143021 A1 WO 2024143021A1 JP 2023045179 W JP2023045179 W JP 2023045179W WO 2024143021 A1 WO2024143021 A1 WO 2024143021A1
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WO
WIPO (PCT)
Prior art keywords
hole
impeller
rotating shaft
chamber
wall
Prior art date
Application number
PCT/JP2023/045179
Other languages
English (en)
Japanese (ja)
Inventor
智也 下瀬
英文 森
潤也 鈴木
貴之 平野
弘晃 加藤
Original Assignee
株式会社豊田自動織機
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社豊田自動織機 filed Critical 株式会社豊田自動織機
Publication of WO2024143021A1 publication Critical patent/WO2024143021A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer

Definitions

  • This disclosure relates to centrifugal compressors.
  • a centrifugal compressor includes a rotating shaft and an impeller.
  • the impeller compresses the fluid by rotating integrally with the rotating shaft.
  • the centrifugal compressor includes a motor and a housing.
  • the motor rotates the rotating shaft.
  • the housing has an impeller chamber, a motor chamber, and a partition wall.
  • the impeller chamber houses the impeller.
  • the motor chamber houses the motor.
  • the partition wall separates the impeller chamber from the motor chamber.
  • the partition wall has an insertion hole through which the rotating shaft is inserted.
  • centrifugal compressors like the one described above, it is desirable to properly cool the motor in order to improve the durability of the centrifugal compressor.
  • a centrifugal compressor includes a rotating shaft, an impeller configured to compress a fluid by rotating integrally with the rotating shaft, a motor configured to rotate the rotating shaft, and a housing having an impeller chamber that accommodates the impeller, a motor chamber that accommodates the motor, and a partition wall that separates the impeller chamber and the motor chamber, the partition wall having an insertion hole through which the rotating shaft is inserted.
  • the second plate 16 is connected to the outer surface of the end wall 12a of the motor housing member 12.
  • the second plate 16 is attached to the end wall 12a of the motor housing member 12 with the thickness direction of the second plate 16 coinciding with the thickness direction of the end wall 12a of the motor housing member 12.
  • the first radial bearing 52 and the second radial bearing 53 support the rotating shaft 41 so that it can rotate in the radial direction, on either side of the motor 20 in the axial direction of the rotating shaft 41.
  • the "radial direction” is the direction perpendicular to the axial direction of the rotating shaft 41.
  • the end wall 12a of the motor housing member 12 has a second hole 62 that forms part of the second insertion hole 26.
  • the second hole 62 corresponds to the space inside the second bearing holder 25.
  • a second radial bearing 53 is arranged between the second bearing holder 25 and the rotating shaft 41.
  • the end wall 12a of the motor housing member 12 is a second wall component that defines the motor chamber 18 and has the second hole 62 that forms part of the second insertion hole 26 and in which the second radial bearing 53 is arranged between its inner surface and the rotating shaft 41. Therefore, the partition wall has a first wall component and a second wall component.
  • the rotating shaft 41 has a shaft portion 63.
  • the shaft portion 63 has a first shaft portion 64, a second shaft portion 65, a third shaft portion 66, and a fourth shaft portion 67.
  • the outer diameter of the first shaft portion 64 is larger than the outer diameters of the second shaft portion 65, the third shaft portion 66, and the fourth shaft portion 67.
  • the outer diameter of the second shaft portion 65 is larger than the outer diameters of the third shaft portion 66 and the fourth shaft portion 67.
  • the outer diameter of the third shaft portion 66 is larger than the outer diameter of the fourth shaft portion 67.
  • the end wall 12a of the motor housing member 12 is provided with a plurality of cooling fins 70.
  • the plurality of cooling fins 70 are provided in a fluid passage 75.
  • Each cooling fin 70 is a flat thin plate.
  • Each cooling fin 70 protrudes from the inner peripheral surface of the small diameter hole 62b toward the rotation axis of the rotating shaft 41.
  • the plurality of cooling fins 70 extend radially with respect to the rotation axis of the rotating shaft 41.
  • the plurality of cooling fins 70 are arranged around the rotating shaft 41.
  • the length of each cooling fin 70 from the inner peripheral surface of the small diameter hole 62b is the same.
  • the edge of each cooling fin 70 on the side closer to the rotating shaft 41 is located on the same circle centered on the rotation axis of the rotating shaft 41.
  • the fluid passage 75 is provided with a guide wall 71 that guides the air that flows into the fluid passage 75 through the first hole 61 toward the multiple cooling fins 70.
  • the guide wall 71 guides the air that flows into the fluid passage 75 through the first hole 61 toward the multiple cooling fins 70, making it easier for the air to dissipate heat to the motor housing member 12 via the multiple cooling fins 70. Therefore, the air that leaks onto the back surface 43a of the second impeller 43 can be efficiently cooled.
  • the motor 20 can be efficiently cooled by utilizing the air that leaks onto the back surface 43a of the second impeller 43.
  • the guide portion 83 is positioned closer to the first hole 61 than the cooling fins 70.
  • the guide portion 83 is positioned inside the large diameter hole 62a.
  • the guide portion 83 overlaps with the cooling fins 70 in the axial direction of the rotating shaft 41.
  • a third embodiment of a centrifugal compressor will be described below with reference to Fig. 6.
  • the third embodiment is different from the first and second embodiments in that the guide wall is provided on the second plate, not on the rotating shaft or the cooling fins.
  • the guide wall 91 has a fixed portion 92 and a guide portion 93.
  • the fixed portion 92 is cylindrical.
  • the guide portion 93 is annular.
  • the guide portion 93 protrudes radially inward from the inner circumferential surface of the end portion of the fixed portion 92 in the axial direction.
  • the fixing portion 92 is provided in the area surrounding the first hole 61 in the second plate 16. Therefore, the guide wall 91 is provided in the area surrounding the first hole 61 in the second plate 16.
  • the fixing portion 92 is provided in the area surrounding the first hole 61 in the second plate 16 with the axial direction of the fixing portion 92 coinciding with the thickness direction of the second plate 16.
  • the guide wall 91 is integrally formed with the second plate 16.
  • a plurality of slits 94 are formed in the fixing portion 92. Each slit 94 connects the space inside the fixing portion 92 to the space outside the fixing portion 92.
  • the guide portion 93 extends from the fixed portion 92 toward the outer peripheral surface of the third shaft portion 66.
  • the inner peripheral surface of the guide portion 93 extends along the outer peripheral surface of the third shaft portion 66.
  • the inner peripheral surface of the guide portion 93 is spaced apart from the outer peripheral surface of the third shaft portion 66.
  • the end of the guide portion 93 opposite the fixed portion 92 overlaps with the first hole 61 in the axial direction of the rotation shaft 41.
  • the air that has passed through the first hole 61 flows into the fluid passage 75.
  • the air that has passed through the first hole 61 flows into the space inside the fixed part 92.
  • the air that has flowed into the space inside the fixed part 92 collides with the guide part 93.
  • the air that has collided with the guide part 93 spreads outward in the radial direction of the rotating shaft 41 and flows into the space outside the fixed part 92 through the multiple slits 94.
  • the air that has flowed into the space outside the fixed part 92 flows toward the multiple cooling fins 70. Therefore, the guide wall 91 guides the air that has passed through the first hole 61 toward the multiple cooling fins 70. Therefore, the guide wall 91 guides the air that flows into the fluid passage 75 through the first hole 61 toward the multiple cooling fins 70.
  • the guide wall 91 is provided in the area surrounding the first hole 61 in the second plate 16 and guides the air that has passed through the first hole 61 toward the multiple cooling fins 70. This allows the guide wall 91 to be provided integrally with the second plate 16. This simplifies the configuration of the centrifugal compressor 10.
  • a fourth embodiment of a centrifugal compressor will be described below with reference to Fig. 7.
  • the fourth embodiment differs from the first, second and third embodiments in that a guide wall is formed on the outer circumferential surface of a rotating shaft.
  • the rotating shaft 41 has a shaft portion 95.
  • the shaft portion 95 has a first shaft portion 95a and a second shaft portion 95b.
  • the outer diameter of the first shaft portion 95a is larger than the outer diameter of the second shaft portion 95b.
  • the second shaft portion 95b protrudes from the end face of the first shaft portion 95a.
  • the axis of the first shaft portion 95a and the axis of the second shaft portion 95b are aligned.
  • the portion of the outer circumferential surface of the first shaft portion 95a that is located within the large diameter hole 62a is an inclined surface 96.
  • the inclined surface 96 is continuous with the end face of the first shaft portion 95a.
  • the inclined surface 96 gradually expands in diameter as it moves away from the end face of the first shaft portion 95a.
  • the inclined surface 96 is a curved surface that curves in an arc in a direction away from the axis of the first shaft portion 95a as it moves away from the end face of the first shaft portion 95a.
  • the inclined surface 96 guides the air that flows into the fluid passage 75 through the first hole 61 toward the multiple cooling fins 70.
  • the number of cooling fins 70 is not particularly limited.
  • the cooling water passage 12c does not necessarily have to be formed in the peripheral wall 12b of the motor housing member 12.
  • the guide wall 91 is integrally formed with the second plate 16, but the guide wall 91 may be a separate part from the second plate 16. In this case, the guide wall 91 may be fixed to the second plate 16 by, for example, welding, or may be fixed by a fastener such as a bolt.
  • the centrifugal compressor 10 may not include the second impeller 43.
  • the partition wall separating the first impeller chamber 28 and the motor chamber 18 may have a first wall component, a second wall component, and a fluid passage.
  • a plurality of communication holes are formed in the second wall component.
  • the partition wall is configured so that air leaking to the back surface of the first impeller 42 flows through the first hole into the fluid flow path, and then through the communication hole and the second hole into the motor chamber 18.
  • a plurality of cooling fins are provided in the fluid passage. The plurality of cooling fins are arranged between the plurality of communication holes adjacent to each other in the circumferential direction of the rotating shaft 41.
  • the centrifugal compressor 10 may include a turbine wheel instead of the second impeller 43 .
  • the centrifugal compressor 10 does not have to be mounted on a fuel cell vehicle. In other words, the centrifugal compressor 10 is not limited to being mounted on a vehicle.
  • the centrifugal compressor 10 is not limited to being used to compress the air supplied to the fuel cell stack 38. In short, the centrifugal compressor 10 may be used to compress a fluid.
  • annular may refer to any structure that, as a whole, forms a loop shape.
  • Annular shapes include, but are not limited to, circles, ellipses, and polygons with sharp or rounded corners.
  • the term “cylindrical” may similarly refer to any structure that has a cross-sectional shape that is, but is not limited to, circles, ellipses, and polygons with sharp or rounded corners.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne un compresseur centrifuge (10) pourvu d'un premier corps constituant une paroi (16) et d'un second corps constituant une paroi (12a). Le second corps constituant une paroi (12a) a une pluralité de trous de communication (68) qui assurent une communication entre un trajet de fluide (75) et une chambre de moteur (18) et sont disposés sur le côté radialement extérieur d'un arbre de rotation (41) par rapport à un second trou (62). Une paroi de séparation (16, 12a) est configurée de telle sorte qu'un fluide s'échappant vers la surface arrière d'une roue (43) s'écoule dans le trajet de fluide (75) par l'intermédiaire d'un premier trou (61), puis s'écoule dans la chambre de moteur (18) par l'intermédiaire des trous de communication (68) et du second trou (62). Une pluralité d'ailettes de refroidissement (70) sont disposées dans le trajet de fluide (75) et sont disposées autour de l'arbre de rotation (40) de façon à s'étendre radialement par rapport à l'axe de rotation de l'arbre de rotation (41). Chacune de la pluralité d'ailettes de refroidissement (70) est disposée entre des trous de communication adjacents de la pluralité de trous de communication (68) dans la direction circonférentielle de l'arbre de rotation (41).
PCT/JP2023/045179 2022-12-27 2023-12-18 Compresseur centrifuge WO2024143021A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-209612 2022-12-27
JP2022209612A JP2024093313A (ja) 2022-12-27 2022-12-27 遠心圧縮機

Publications (1)

Publication Number Publication Date
WO2024143021A1 true WO2024143021A1 (fr) 2024-07-04

Family

ID=91717366

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/045179 WO2024143021A1 (fr) 2022-12-27 2023-12-18 Compresseur centrifuge

Country Status (2)

Country Link
JP (1) JP2024093313A (fr)
WO (1) WO2024143021A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015187444A (ja) * 2014-03-26 2015-10-29 ハネウェル・インターナショナル・インコーポレーテッド ディフューザの壁を形成する遮熱材を有する、電気モーター駆動圧縮機

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015187444A (ja) * 2014-03-26 2015-10-29 ハネウェル・インターナショナル・インコーポレーテッド ディフューザの壁を形成する遮熱材を有する、電気モーター駆動圧縮機

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JP2024093313A (ja) 2024-07-09

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