WO2024075374A1 - Machine tournante - Google Patents

Machine tournante Download PDF

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Publication number
WO2024075374A1
WO2024075374A1 PCT/JP2023/027824 JP2023027824W WO2024075374A1 WO 2024075374 A1 WO2024075374 A1 WO 2024075374A1 JP 2023027824 W JP2023027824 W JP 2023027824W WO 2024075374 A1 WO2024075374 A1 WO 2024075374A1
Authority
WO
WIPO (PCT)
Prior art keywords
stator
housing
partition member
space
rotating shaft
Prior art date
Application number
PCT/JP2023/027824
Other languages
English (en)
Japanese (ja)
Inventor
海 飯嶋
達哉 福井
達身 猪俣
Original Assignee
株式会社Ihi
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Ihi filed Critical 株式会社Ihi
Publication of WO2024075374A1 publication Critical patent/WO2024075374A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/08—Insulating casings

Definitions

  • This disclosure relates to rotating machinery.
  • a known technology for rotating machines is to fill the gaps in the rotor or stator with a filler to seal at least a portion of the exposed surface of the rotor or stator (e.g., the magnet) and prevent rust (e.g., Patent Document 1).
  • the case of an electric motor equipped with a stator and rotor may be filled with a resin material.
  • the case has a first housing space that houses the stator and a second housing space that houses the rotor.
  • a known method is to fill the first housing space with resin material using a core placed in the second housing space, from a state in which the first housing space and the second housing space are in communication with each other. With this method, the distance (magnetic gap) between the rotor and stator, which face each other in a cross-sectional view including the axis of the rotating shaft, tends to increase according to the draft angle of the core.
  • This disclosure describes a rotating machine that can fill the first storage space with resin material without creating a magnetic gap caused by the core draft when the first storage space and the second storage space are in communication with each other.
  • a rotating machine includes an electric motor with a stator and a rotor, a rotating shaft that rotates when driven by the electric motor, an impeller attached to the rotating shaft, and a case that surrounds the stator and to which the stator is fixed.
  • the case has a first housing space that houses the stator and a second housing space that houses the rotor so as to face the stator in the first housing space in a cross-sectional view including the axis of the rotating shaft.
  • the first housing space is filled with a resin material in a state where it is partitioned from the second housing space by a partition member arranged along the inner peripheral edge of the stator.
  • the resin material when filling the first storage space with resin material from a state in which the first storage space and the second storage space are in communication with each other, the resin material can be filled without creating a magnetic gap due to the core draft.
  • FIG. 1 is a cross-sectional view of an example of a rotating machine according to an embodiment.
  • FIG. 2 is a cross-sectional view showing a first accommodating space and a second accommodating space of the rotary machine of FIG.
  • FIG. 3 is an enlarged cross-sectional view of a main portion of the rotary machine of FIG.
  • FIG. 4 is a cross-sectional view showing a process of arranging the stator.
  • FIG. 5 is a cross-sectional view showing a process of forming the first accommodation space and the second accommodation space.
  • FIG. 6 is a cross-sectional view showing a partitioning process using a partition member.
  • FIG. 7 is a cross-sectional view showing the resin filling step.
  • FIG. 8 is a perspective view of a split core of a rotary machine according to a modified example.
  • FIG. 9 is a front view of the split core of FIG.
  • a rotating machine includes an electric motor with a stator and a rotor, a rotating shaft that rotates when driven by the electric motor, an impeller attached to the rotating shaft, and a case that surrounds the stator and to which the stator is fixed.
  • the case has a first housing space that houses the stator and a second housing space that houses the rotor so as to face the stator in the first housing space in a cross-sectional view including the axis of the rotating shaft.
  • the first housing space is filled with a resin material in a state where it is partitioned from the second housing space by a partition member arranged along the inner peripheral edge of the stator.
  • the first storage space and the second storage space are partitioned by a partition member.
  • the resin material when the resin material is filled into the first storage space, there is no need to seal the first storage space with a core, and therefore no magnetic gap is generated due to the core's draw gradient. Therefore, when the resin material is filled into the first storage space from a state in which the first storage space and the second storage space are connected, the resin material can be filled without generating a magnetic gap due to the core's draw gradient.
  • the partition member may be a pipe member having an outer peripheral surface that conforms to the inner peripheral end of the stator. With this configuration, the partition member can be easily constructed using a pipe member.
  • the case may have an injection hole that communicates with the first storage space.
  • the resin material can be filled into the first storage space through the injection hole of the case while the first storage space and the second storage space are separated by the partition member.
  • FIG. 1 is a cross-sectional view of an example of a rotary machine according to an embodiment.
  • the rotary machine 1 is an electric turbocharger used to supply air to a vehicle fuel cell.
  • the rotary machine 1 includes a turbine 2 and a compressor 3.
  • the turbine 2 includes a turbine impeller 22 arranged in a turbine housing 21.
  • the compressor 3 includes a compressor impeller 32 arranged in a compressor housing 31.
  • a motor housing (case) 4 is installed between the turbine housing 21 and the compressor housing 31.
  • the motor housing 4 has a two-piece structure, for example, a first housing 41 on the turbine housing 21 side and a second housing 42 on the compressor housing 31 side.
  • the electric motor 5 is disposed between the turbine 2 and the compressor 3.
  • the electric motor 5 includes a stator 51 and a rotor 52.
  • the stator 51 is fixed to the motor housing 4 so as to surround the rotor 52.
  • the motor housing 4 surrounds the stator 51.
  • the stator 51 includes a coil 51a for generating a magnetic field and a stator core 51b around which the coil 51a is wound.
  • the electric motor 5 includes a rotating shaft 6 that is rotatably supported within the motor housing 4.
  • a rotor 52 is attached to the rotating shaft 6.
  • the rotor 52 includes one or more permanent magnets (not shown).
  • the electric motor 5 drives the rotating shaft 6 by the interaction of the magnetic forces of the stator 51 and the rotor 52. In other words, the rotating shaft 6 rotates when driven by the electric motor 5.
  • the turbine impeller 22 and the compressor impeller 32 are fixed to the rotating shaft 6.
  • the turbine impeller 22 rotates the compressor impeller 32 via the rotating shaft 6.
  • the turbine impeller 22 drives the compressor impeller 32 in cooperation with the electric motor 5.
  • the rotating shaft 6 is supported for free rotation by a number of bearings.
  • two radial bearings 61, 62 are provided inside the motor housing 4, arranged axially on either side of the rotor 52.
  • the rotating shaft 6 is supported in the radial direction by these radial bearings 61, 62.
  • a pair of thrust air bearings 63, 64 and a thrust collar 65 are provided between the radial bearing 62 and the compressor impeller 32.
  • the thrust collar 65 is a disc-shaped member that protrudes like a brim around the rotating shaft 6.
  • the rotating shaft 6 is supported in the thrust direction by these thrust air bearings 63, 64.
  • the motor housing 4 has a first housing space 11 and a second housing space 12.
  • the first housing space 11 is a space that houses the stator 51.
  • the first housing space 11 is formed, for example, inside the motor housing 4 by a first inner wall surface 43 on the turbine 2 side, a second inner wall surface 44 on the compressor 3 side, and a third inner wall surface 45 that connects the first inner wall surface 43 and the second inner wall surface 44.
  • the first inner wall surface 43 and the third inner wall surface 45 are inner wall surfaces of the first housing 41.
  • the second inner wall surface 44 is an inner wall surface of the second housing 42.
  • the first housing space 11 may be a substantially cylindrical space formed inside the motor housing 4 so as to surround the rotating shaft 6 and the rotor 52.
  • the second accommodation space 12 is a space that accommodates the rotating shaft 6 and the rotor 52.
  • the second accommodation space 12 is formed, for example, inside the motor housing 4 by being surrounded by the radial bearing 61, the radial bearing 62, and the inner peripheral end 51c of the stator 51.
  • the second accommodation space 12 is a substantially cylindrical space that extends along the axis L inside the motor housing 4, with the bearing support portion 41a that supports the radial bearing 61 and the bearing support portion 42a that supports the radial bearing 62 at both ends.
  • the second accommodation space 12 may penetrate the center of the motor housing 4 along the axis L.
  • the first housing space 11 and the second housing space 12 are connected.
  • the rotor 52 accommodated in the second housing space 12 faces the stator 51 accommodated in the first housing space 11 via the partition member 10 in a cross-sectional view including the axis L of the rotating shaft 6.
  • the first housing space 11 is filled with a resin material 7.
  • the resin material 7 is filled in the first housing space 11 in a state where it is partitioned from the second housing space 12 by a partition member 10 arranged along the inner circumferential end 51c of the stator 51.
  • the resin material 7 can be, for example, an epoxy resin.
  • the partition member 10 is, for example, a pipe member having an outer peripheral surface 10a that is aligned with the inner peripheral end 51c of the stator 51.
  • a material for the partition member 10 a material other than metal, for example, a resin, can be used from the viewpoint of suppressing magnetic leakage.
  • the partition member 10 may be a heat-resistant and water-resistant (low water absorption) resin pipe such as polyphenylene sulfide (PPS), taking into consideration that the gas flowing into the turbine 2 contains a large amount of moisture.
  • PPS polyphenylene sulfide
  • the partition member 10 may be a glass fiber reinforced plastic (GFRP) with two or less layers of laminated glass sheets from the viewpoint of suppressing the gap (magnetic gap) between the stator 51 and the rotor 52.
  • GFRP glass fiber reinforced plastic
  • the partition member 10 may be a pipe made of injection molding or extrusion material. Note that the end faces of the cut parts of the partition member 10 are shown in FIG. 2 and FIG. 6.
  • FIG. 3 is an enlarged cross-sectional view of a main part of the rotary machine of FIG. 1.
  • the partition member 10 is provided to connect the radial bearing 61 and the radial bearing 62.
  • the partition member 10 is provided to connect the bearing support portion 41a supporting the radial bearing 61 and the bearing support portion 42a supporting the radial bearing 62.
  • the outer peripheral surface of the radial bearing 61 abuts against the bearing support portion 41a of the first housing 41.
  • the first housing 41 includes a lip portion 41b that protrudes radially inward from the compressor 3 side end of the bearing support portion 41a.
  • the inner peripheral end surface 41c of the lip portion 41b forms a cylindrical surface centered on the axis L.
  • the outer peripheral surface of the radial bearing 62 abuts against the bearing support portion 42a of the second housing 42.
  • the second housing 42 includes a lip portion 42b that protrudes radially inward from the turbine 2 side end of the bearing support portion 42a.
  • the inner peripheral end surface 42c of the lip portion 42b forms a cylindrical surface centered on the axis L.
  • the inner peripheral end surface 41c of the lip portion 41b, the inner peripheral end surface 42c of the lip portion 42b, and the inner peripheral end 51c of the stator 51 are located on a common cylindrical surface centered on the axis L, for example.
  • the outer peripheral surface 10a of the partition member 10 here abuts against the inner peripheral end surface 41c of the lip portion 41b, the inner peripheral end surface 42c of the lip portion 42b, and the inner peripheral end 51c of the stator 51.
  • the outer peripheral surface 10a of the partition member 10 does not necessarily have to abut against the inner peripheral end 51c of the stator 51.
  • the partition member 10 partitions the first storage space 11 and the second storage space 12 so that the resin material 7 can be filled therein.
  • “Fillably partitioned” means that the partitioning member 10 does not necessarily have to liquid-tightly seal the first storage space 11 and the second storage space 12. For example, even if a small gap exists, when the resin material 7 is filled, the heated resin material 7 cools and hardens to close the small gap, and this is included in "fillably partitioned.”
  • the motor housing 4 has an injection hole 47 that communicates with the first housing space 11.
  • the injection hole 47 may be, for example, a through hole provided in the wall portion 46 on the turbine 2 side of the first housing 41.
  • the injection hole 47 communicates between the inside and outside of the first housing 41 when the turbine housing 21 is removed.
  • the resin material 7 is filled into the first housing space 11 through the injection hole 47 in a state where it is partitioned from the second housing space 12 by the partition member 10.
  • the second housing 42 is attached to the first housing 41. This forms the first housing space 11 and the second housing space 12.
  • the mating portion 42d of the second housing 42 is fitted into the opening 41d of the first housing 41 and fastened with a fixing bolt (not shown).
  • the wiring from the stator 51 is connected to the connector 51d, and the connector 51d is inserted into the connector mounting portion 42e of the second housing 42. This allows the space inside the connector mounting portion 42e to be sealed as part of the first housing space 11.
  • the partition member 10 is arranged so as to partition the first housing space 11 and the second housing space 12 (partitioning process).
  • the partition member 10 is arranged so as to connect the bearing support portion 42a of the second housing 42 and the bearing support portion 41a of the first housing 41.
  • the partition member 10 is arranged so that the outer peripheral surface 10a of the partition member 10 abuts the inner peripheral end surface 41c of the lip portion 41b, the inner peripheral end surface 42c of the lip portion 42b, and the inner peripheral end 51c of the stator 51 (see FIG. 3).
  • the partition member 10 is arranged along the inner peripheral end 51c of the stator 51.
  • the partition member 10 partitions the first housing space 11 and the second housing space 12 so that the resin material 7 can be filled in the first housing space 11.
  • an adhesive may be interposed between the inner peripheral end surface 41c and the partition member 10, and between the inner peripheral end surface 42c and the partition member 10.
  • the first housing space 11 is filled with the resin material 7 (filling process).
  • the first housing space 11 is filled with the resin material 7 through the injection hole 47 that connects the inside and outside of the first housing 41.
  • the motor housing 4 on the injection side may be preheated (for example, 80°C). A vacuum environment is created, and liquid epoxy resin as the resin material 7 is injected into the first housing space 11 through the injection hole 47.
  • the resin material 7 is heated to 100°C to 120°C using a curing furnace to cure the resin material 7 for a predetermined time (for example, 4 hours).
  • a radial bearing 61 is attached to the bearing support portion 41a of the first housing 41.
  • the rotating shaft 6 to which the rotor 52 is fixed is accommodated in the second housing space 12.
  • a radial bearing 62 is attached to the bearing support portion 42a of the second housing 42. While attaching the thrust collar 65 to the rotating shaft 6, attach the thrust air bearings 63, 64 to the second housing 42.
  • the rotating machine 1 is thus manufactured. Thereafter, as shown in FIG. 1, the turbine impeller 22 and the compressor impeller 32 may be fixed to the rotating shaft 6. The turbine housing 21 and the compressor housing 31 may be attached to the motor housing 4.
  • the resin material 7 when the resin material 7 is filled into the first housing space 11, the first housing space 11 and the second housing space 12 are partitioned by the partition member 10. In other words, when the resin material 7 is filled into the first housing space 11, there is no need to seal the first housing space 11 with a core, so no magnetic gap is generated due to the core's draw gradient. Therefore, when the resin material 7 is filled into the first housing space 11 from a state in which the first housing space 11 and the second housing space 12 are connected, the resin material 7 can be filled without generating a magnetic gap due to the core's draw gradient.
  • the core could not be removed before the resin material 7 was filled and hardened, and the core could not be used to fill another rotating machine with resin material 7.
  • the rotating machine 1 is completed without removing the partition member 10. This makes it possible to suppress the increase in costs associated with preparing many cores. In addition, the effort and cost associated with the process of removing the cores can be reduced.
  • the partition member 10 is a pipe member having an outer peripheral surface 10a that fits along the inner peripheral end 51c of the stator 51. With this configuration, the partition member 10 can be easily constructed using a pipe member.
  • the motor housing 4 has an injection hole 47 that communicates with the first housing space 11.
  • the resin material 7 can be filled into the first housing space 11 through the injection hole 47 of the motor housing 4 while the first housing space 11 and the second housing space 12 are separated by the partition member 10.
  • the partition member 10 is constructed from a single resin pipe, but it may be divided into multiple parts in the axial direction to form a pipe shape as a whole.
  • the partition member 10 is a pipe member, but this is not limited to this example.
  • the inner peripheral end 51c of the stator 51 is arranged discretely around the axis L, and a separate partition member 10 is provided, but the inner peripheral end of the stator may be configured as an inner peripheral surface that is continuous around the axis L to provide the partition member function.
  • the stator 53 may have a split core 53X in which the stator core 53b is split into a plurality of divided parts (e.g., six parts) around the axis L.
  • the dashed lines in Figure 9 are division lines that virtually extend radially according to the number of divided parts.
  • the inner peripheral end of the stator 53 may be provided with a resin bobbin 54 whose inner peripheral surface 54a is an arc surface with a central angle corresponding to the number of divided parts of the split core 53X.
  • a resin bobbin 54 whose inner peripheral surface 54a is an arc surface with a central angle corresponding to the number of divided parts of the split core 53X.
  • the inner circumferential surfaces 54a of the divided resin bobbins 54 become continuous, and the inner circumferential surfaces 54a as a whole form a cylindrical partition member 10X.
  • the end faces of adjacent resin bobbins 54 may be shaped to engage with each other (for example, shapes in which the projections and recesses correspond to each other).
  • adhesive is applied between the inner peripheral end face 41c and the partition member 10, and between the inner peripheral end face 42c and the partition member 10, but adhesive may be omitted.
  • the resin of the partition member 10 may have a larger thermal expansion than the metal motor housing 4.
  • the inner peripheral end face 41c and the partition member 10, and the inner peripheral end face 42c and the partition member 10 may be in contact with each other at tapered surfaces inclined relative to the axis L, thereby improving adhesion due to expansion.
  • the motor housing 4 has an injection hole 47 that communicates with the first housing space 11, but the injection hole 47 is not essential.
  • An injection hole may be provided in a member other than the motor housing 4, for example, in the partition member 10.
  • the turbine impeller 22 and the compressor impeller 32 are fixed to the rotating shaft 6, but the turbine impeller 22 and the compressor impeller 32 may be omitted.
  • an electric motor having a stator and a rotor; A rotating shaft that is rotated by the driving of the electric motor; a case surrounding the stator and to which the stator is fixed, the case has a first accommodating space that accommodates the stator, and a second accommodating space that accommodates the rotor so as to face the stator in the first accommodating space in a cross-sectional view including an axis of the rotating shaft, a partition member disposed along an inner circumferential end of the stator, the partition member separating the first accommodating space from the second accommodating space and filling the first accommodating space with resin material; [2] The rotating machine according to [1], wherein the partition member is a pipe member having an outer circumferential surface that conforms to an inner circumferential end of the stator.
  • a method for manufacturing a rotary machine including an electric motor including a stator and a rotor, a rotary shaft that rotates by driving the electric motor, and a case that surrounds the stator and to which the stator is fixed, comprising the steps of: a stator placement step of placing the stator in the case; a partitioning step of disposing a partition member along an inner circumferential end of the stator; a filling process for filling a resin material into a first accommodating space that accommodates the stator and a second accommodating space that accommodates the rotor so as to face the stator in the first accommodating space in a cross-sectional view including the axis of the rotating shaft, the first accommodating space being partitioned by the partition member.
  • Rotating machine Motor housing (case) Reference Signs List 5 Electric motor 6 Rotating shaft 7 Resin material 10, 10X Partition member 10a Outer circumferential surface 11 First accommodation space 12 Second accommodation space 47 Injection holes 51, 53 Stator 51c Inner circumferential end 52 Rotor L Axis

Abstract

La présente invention concerne une machine tournante qui comprend : un moteur électrique pourvu d'un stator et d'un rotor ; un arbre rotatif qui tourne sous l'effet de l'entraînement du moteur électrique ; une roue fixée à l'arbre rotatif ; et un boîtier qui entoure le stator, ce dernier étant fixé au boîtier. Le boîtier comprend un premier espace de réception pour loger le stator et un second espace de réception pour loger le rotor de manière à faire face au stator dans le premier espace de réception dans une vue en coupe transversale qui inclut l'axe de l'arbre rotatif. Le premier espace de réception est rempli d'un matériau en résine qui est séparé du second espace de réception par un élément de séparation disposé le long du bord périphérique interne du stator.
PCT/JP2023/027824 2022-10-04 2023-07-28 Machine tournante WO2024075374A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-160033 2022-10-04
JP2022160033 2022-10-04

Publications (1)

Publication Number Publication Date
WO2024075374A1 true WO2024075374A1 (fr) 2024-04-11

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ID=90607994

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/027824 WO2024075374A1 (fr) 2022-10-04 2023-07-28 Machine tournante

Country Status (1)

Country Link
WO (1) WO2024075374A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5893442A (ja) * 1981-11-26 1983-06-03 Hitachi Ltd キヤンドモ−トルの固定子とその製造法
JP2012223063A (ja) * 2011-04-14 2012-11-12 Nikkiso Co Ltd キャンドモータポンプ及びそのステータ室内に充填材を充填する方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5893442A (ja) * 1981-11-26 1983-06-03 Hitachi Ltd キヤンドモ−トルの固定子とその製造法
JP2012223063A (ja) * 2011-04-14 2012-11-12 Nikkiso Co Ltd キャンドモータポンプ及びそのステータ室内に充填材を充填する方法

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