WO1994027353A1 - Moteur electrique dote d'un moyen de refroidissement - Google Patents

Moteur electrique dote d'un moyen de refroidissement Download PDF

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Publication number
WO1994027353A1
WO1994027353A1 PCT/JP1994/000807 JP9400807W WO9427353A1 WO 1994027353 A1 WO1994027353 A1 WO 1994027353A1 JP 9400807 W JP9400807 W JP 9400807W WO 9427353 A1 WO9427353 A1 WO 9427353A1
Authority
WO
WIPO (PCT)
Prior art keywords
cooling medium
electric motor
rotor
passage
wall
Prior art date
Application number
PCT/JP1994/000807
Other languages
English (en)
Japanese (ja)
Inventor
Kosei Nakamura
Masami Kimijima
Original Assignee
Kosei Nakamura
Masami Kimijima
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 Kosei Nakamura, Masami Kimijima filed Critical Kosei Nakamura
Publication of WO1994027353A1 publication Critical patent/WO1994027353A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/10—Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing
    • H02K9/12—Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing wherein the cooling medium circulates freely within the casing

Definitions

  • the present invention relates to a motor provided with a cooling means, and more particularly to a motor provided with a cooling means capable of effectively cooling a rotor.
  • Induction motors are generally used to drive the main shaft to rotate.
  • this type of induction motor (so-called spindle motor) needs to be equipped with a more effective cooling system to obtain high output.
  • spindle motor in the case of a built-in type spindle motor directly connected to the main shaft, the heat generated in the mouth-evening is transmitted directly to the main shaft, so it is necessary to cool the rotor effectively.
  • a method of blowing compressed air to the rotor by an external device and a method of providing a cooling medium passage extending in the axial direction in the rotor shaft are implemented.
  • the temperature rise is relatively easily and effectively suppressed for the stay, which is a fixed element of the electric motor, by providing a cooling medium passage in the housing and the stay core. be able to.
  • An object of the present invention is to provide an electric motor which has a simple cooling means capable of effectively suppressing the temperature rise of the electric motor by actively cooling the rotor, and which can achieve high speed and high output.
  • the present invention provides a rotor fixed to a shaft, a stay surrounding a rotor with an air gap therebetween, a rotor fixedly supporting the stay and a rotor via bearing means.
  • Housing means for rotatably supporting the motor a first wall having a first hole group opening toward one axial end face of the rotor, and the internal space of the motor and the surrounding environment through the first hole group.
  • a cooling medium distribution means is provided in the housing means and provided with a second passage for communicating the internal space of the electric motor with the surrounding environment through the second wall and the second hole group, and by depressurizing the second passage. Cooling medium discharged from the first group of holes through the gap, collected through the second group of holes in the second wall, and discharged from the second passage to the outside of the motor. I do.
  • the cooling medium distributing means appropriately distributes and jets the cooling medium, which has been pressure-fed to the first passage from outside the motor, from the first hole group toward one axial end surface of the rotor.
  • the cooling medium substantially uniformly enters the gap between the rotor and the stay over the entire circumference.
  • the cooling medium easily passes through the narrow gap even at the time of high-speed rotation of the rotor, and reaches the other axial end face of the rotor. In this way, the cooling medium that has exchanged heat with the outer surface of the rotor is positively discharged to the outside of the motor through the second hole group and the second passage of the cooling medium collecting means.
  • the cooling medium passing through the gap can absorb the heat of the stay.
  • the first wall of the cooling medium distribution means is provided on the inner surface of the housing means exposed to the internal space of the motor, and the first group of holes is formed on the inner surface of the housing means.
  • the first passage has an opening on an outer surface of the housing means that is exposed to the surrounding environment of the electric motor, and includes a branch path portion that communicates with the first hole group of the first wall.
  • the cooling medium distribution means includes a hollow first annular member that is supported by the housing means around the shaft near one axial end surface of the rotor.
  • the first annular member includes an axial end wall abutting on the housing means and an axial other end opposed to the axial end surface of the rotor.
  • the cooling medium distribution means may include a cooling medium supply device that is arranged outside the electric motor and that supplies the cooling medium to the first passage under pressure.
  • a second wall of the cooling medium collecting means is provided on an inner surface of the housing means exposed to the internal space of the electric motor, a second group of holes is opened on the inner surface of the housing means, and a second passage is provided. It is preferable to provide a branch path portion that opens on the outer surface of the housing means exposed to the surrounding environment of the electric motor and communicates with the second hole group of the second wall.
  • the cooling medium collecting means includes a hollow second annular member which is supported by the housing means around the shaft near the other axial end face of the rotor.
  • the second annular member includes an axial end wall abutting on the housing means, an axial other end wall facing the axial end surface of the rotor, and an annular cavity defined between the end walls.
  • the second passage is open to the outer surface of the housing means exposed to the surrounding environment of the motor and communicates with the annular cavity, and the second hole group is formed in the other end wall in the axial direction to form the annular cavity. Is communicated to.
  • the cooling medium collecting means may include a cooling medium suction device that is disposed outside the electric motor and suctions the cooling medium after the completion of the heat exchange from the second passage under reduced pressure.
  • FIG. 1 is a sectional view of an electric motor according to an embodiment of the present invention
  • FIG. 2 is an end view of the annular member in the electric motor of FIG. 1
  • FIG. 3 is another end view of the annular member of FIG. 2
  • FIG. 4 is a cross-sectional view of the annular member of FIG. 2 taken along the line IV-IV;
  • FIG. 5 is a cross-sectional view of the annular member of FIG. 4 taken along line VV
  • FIG. 6 is a partially enlarged cross-sectional view of a motor according to another embodiment.
  • FIG. 1 shows an electric motor 10 with cooling means according to an embodiment of the present invention.
  • the motor 10 includes a shaft 12, a rotor 14 fixed to the shaft 12, a stay 18 surrounding the mouth 14 with an air gap 16 interposed therebetween, and a stay 18 And housing means 20 for fixedly supporting the housing 14 and rotatably supporting the mouth 14 via the shaft 12.
  • the electric motor 10 can be configured as an induction motor used for a spindle motor of a machine tool, for example.
  • the rotor 14 is composed of a rotor core 22 composed of a laminate of a large number of magnetic steel sheets as shown in the figure, and a conductor portion (end ring) that is preferably incorporated into the rotor core 22 by a fabrication process such as die casting. (Only 24 shown).
  • the stay 18 includes a stay core 26 made of a laminate of many electromagnetic steel sheets, and a plurality of windings 28 wound around the stay core 26.
  • the housing means 20 includes a central housing 30 that is closely fixed to the outer peripheral surface of the stay core 26, a first end housing 32 and a first end housing 32 that are respectively connected to axial ends of the central housing 30. And two end housings 3 4. Each of the end housings 32 and 34 rotatably supports the shaft 12 via a bearing 36, respectively.
  • the wire ends 38 of the windings 28 of the stay 18 are preferably covered with an annular molded resin member 40 adjacent to the axial end faces of the stay core 26. No. Each resin member 40 is preferably arranged in contact with each end housing 32, 34.
  • Resin material can also be filled in the space (not shown) of the stay core 26 that accommodates that portion.
  • the cooling medium flow path 42 for absorbing the heat of the stator core 26 and the windings 28 via the housing means 20 and the resin member 40 includes a central housing 30 and end housings 3 2. , 3 4 are formed continuously.
  • the electric motor 10 is fixed to the first end housing 32 so as to surround the shaft 12 and face the axial end surface 14 a of the rotor 14 as cooling medium distribution means for cooling the rotor.
  • a hollow first annular member 4 is provided.
  • the first annular member 44 has an annular cavity 46 therein.
  • one through hole 50 communicating with the annular cavity 46 is formed in the annular wall 48 forming one axial end surface of the first annular member 44.
  • a plurality of through holes 54 communicating with the annular cavity 46 are formed in the annular wall 52 that forms the other axial end surface of the first annular member 44. .
  • the plurality of through holes 54 are arranged at substantially equal intervals in the circumferential direction of the annular wall 52 as shown in the figure. Preferably.
  • the annular wall 48 of the first annular member 44 is in contact with an annular shoulder surface 56 formed on the outer periphery of the first end housing 32, while the annular wall 48 is Numeral 52 is arranged to face one end surface 14 a of the rotor 14 in the axial direction. Therefore, the plurality of through holes 54 formed in the annular wall 52 constitute a first hole group that opens toward the one end surface 14 a in the axial direction of the mouth 14.
  • the first end housing 32 is provided with a passage 58 extending between the outer peripheral surface 32 a and the shoulder surface 56.
  • One through hole 50 formed in the annular wall 48 of the first annular member 44 communicates with the passage 58 at the shoulder surface 56. Therefore, the passage 58, the through hole 50, and the annular cavity 46 are connected to the first space through the first hole group to communicate the internal space of the motor with the surrounding environment. Construct one passage.
  • the electric motor 10 is fixed to the second end housing 34 as a cooling medium collecting means for cooling the rotor, surrounding the shaft 12 and facing the other axial end surface 14 b of the rotor 14.
  • Hollow second annular member 6 is fixed to the second end housing 34 as a cooling medium collecting means for cooling the rotor, surrounding the shaft 12 and facing the other axial end surface 14 b of the rotor 14.
  • the second annular member 60 has the same structure as the first annular member 44, but each component is denoted by a different reference number from the first annular member 44 for explanation, and in FIGS. The number is shown in parentheses. 2nd annular member
  • annular wall 66 provided with one through hole 64 communicating with the internal annular cavity 62, and an annular shoulder surface 68 formed on the inner peripheral portion of the second end housing 34.
  • the other end surface of the rotor 14 in the axial direction is provided with an annular wall 72 having a plurality of through holes 70 abutting thereon and communicating with the annular cavity 62.
  • the second end housing 34 is fixedly supported by the second end housing 34 while being opposed to the 14 b. Therefore, the plurality of through holes 70 in the annular wall 72 constitute a second hole group that opens toward the other axial end surface 14 b of the mouth 14.
  • the second end housing 34 is provided with a passage 74 extending between the outer peripheral surface 34 a and the shoulder surface 68.
  • One through hole 64 formed in the annular wall 66 of the second annular member 60 communicates with the passage 74 at the shoulder surface 68. Accordingly, the passage 74, the through-hole 64, and the annular cavity 62 constitute a second passage that communicates the internal space of the electric motor with the surrounding environment via the second hole group.
  • the first annular member 44 is divided by a dividing line 76 into a half portion 78 having an annular wall 48 and a half portion 80 having an annular wall 52. Therefore, the first annular member 44 is formed by forming or machining each of the half portions 78, 80, and then forming the two half portions 78, 80 so that the annular cavity 46 is formed. It can be formed by combining and firmly fixing each other.
  • the second annular member 60 includes a half portion 78 having an annular wall 66 and a half portion 80 having an annular wall 72 formed in an annular shape. It is formed by assembling and closely fixing the cavities 62 so as to form them.
  • a passage 58 provided in the first end housing 32 can be connected to a cooling medium feeding device 82 installed outside the electric motor 10 (the cooling medium feeding device 82 is A well-known device, such as a compressor, etc., capable of supplying a cooling medium under pressure to a passage 58 of the first end housing 32.
  • a passage 74 provided in the second end housing 34 The cooling medium suction device 84 can be connected to a cooling medium suction device 84 installed outside the motor 10 (the cooling medium suction device 84 can supply cooling medium from a passage 74 of the second end housing 34 such as a vacuum device). It consists of a well-known device that can be inhaled under reduced pressure.
  • the cooling medium supply device 82 When the cooling medium supply device 82 is operated, the cooling medium is supplied under pressure to the passage 58 of the first end housing 32.
  • the cooling medium supplied to the passage 58 passes through the through-hole 50 and the annular cavity 46 of the first annular member 44, and passes through the plurality of through-holes 54 to the axial end surface 1 of the mouth 14. It is appropriately distributed and ejected toward 4a.
  • the cooling medium suction device 84 operates at the same time as the cooling medium feeding device 82, so that the cooling medium ejected from the plurality of through holes 54 of the first annular member 44 easily passes through the narrow gap 16. After passing through, it reaches the other axial end surface 14 b of the rotor 14.
  • the cooling medium flows uniformly along the entire surface of the rotor 14 inside the motor, and effectively absorbs the heat from the surface of the rotor 14.
  • the cooling medium that has exchanged heat with the rotor 14 is collected via the plurality of through-holes 70 of the second annular member 60 by the operation of the cooling medium suction device 84, and the annular cavity 6 2 And through the through hole 64, and is forcibly discharged to the outside of the motor 10 from the passage 74.
  • FIG. 6 shows an electric motor according to another embodiment of the present invention.
  • the first wall 86 of the cooling medium distribution means is exposed to the internal space of the motor.
  • the first wall 86 is formed with a first hole group 90 that opens toward one axial end surface 14 a of the rotor 14.
  • a branch path 92 composed of an annular cavity communicating with the first hole group 90.
  • the first passage 94 opens to the outer peripheral surface 88 a of the first end housing 88 exposed to the surrounding environment of the motor, and communicates with the branch passage 92.
  • the cooling medium when the cooling medium is supplied from outside the motor to the first passage 94 under pressure, the cooling medium passes from the first hole group 90 to the shaft of the rotor 14 through the branching passage 92. It is appropriately distributed and ejected toward one end surface 14a in the direction.
  • annular member 96 having a substantially L-shaped cross section as shown in the figure.
  • the annular member 96 includes a first passage group 92 having an annular cavity formed between the annular member 96 and the first end housing 88 and having a first hole group 90.
  • the first end housing 88 is fixed to the shoulder 98 of the first end housing 88 so that the wall 86 faces the one end surface 14 a of the rotor 14 in the axial direction.
  • the annular member 96 has an advantage that it can be easily manufactured with a smaller number of parts than the respective annular members 44 and 60 in the electric motor 10 of FIG. Needless to say, the same configuration can be adopted in the cooling medium collecting means.
  • the cooling medium flows inside the electric motor, a gas such as air is generally used.
  • a gas such as air is generally used.
  • the winding 28 of the stay 18 is used.
  • a mist-like cooling medium it is also possible to use.
  • the electric motor according to the present invention can be applied to a synchronous motor and a DC motor in addition to the induction motor.
  • the cooling medium is pressurized and distributed toward one axial end face of the mouth by the cooling medium distribution means, and at the same time, the cooling medium whose heat exchange is completed is opposed to the other axial end face of the rotor.
  • the cooling medium can be positively supplied to the periphery of the rotor and discharged to the outside of the motor.
  • the heat exchange capacity of the cooling medium is improved, the rotor can be actively cooled and the temperature rise of the motor can be effectively suppressed, and the bearing life of the motor can be improved, and the speed and speed can be increased. Outputting becomes easy.
  • special equipment such as drilling on the shaft and joining equipment is not required, it is widely used in industry as a high-performance motor with a simple structure and cooling means that can be manufactured at low cost. is there.

Abstract

Moteur électrique (10) comprenant un stator renfermant un rotor (14) présentant un arbre (12), monté rotatif sur un premier (32) et un deuxième (34) carter d'extrémité. Un premier élément annulaire (44) fixé au premier carter d'extrémité (32) faisant face à une extrémité axiale (14a) du rotor (14) présente un orifice traversant (50) communiquant avec une voie (58) dudit premier carter d'extrémité (32), une cavité annulaire (46), et une pluralité d'orifices traversants ouverts du côté rotor (14). Le liquide de refroidissement envoyé sous pression de l'extérieur dans la voie (58) est injecté à l'intérieur du moteur électrique (10) à travers un premier élément annulaire (44). Un deuxième élément annulaire (60) présentant la même structure que celle du premier élément annulaire (44) est fixé au deuxième carter d'extrémité. Une fois que le liquide de refroidissement a absorbé la chaleur dégagée par le rotor (14), il est recueilli à travers le deuxième élément annulaire (60) à une pression réduite, et est évacué d'une voie (74) du deuxième carter d'extrémité (34) vers l'extérieur du moteur électrique (10).
PCT/JP1994/000807 1993-05-19 1994-05-19 Moteur electrique dote d'un moyen de refroidissement WO1994027353A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP5/116949 1993-05-19
JP11694993A JPH06335200A (ja) 1993-05-19 1993-05-19 ロータ冷却手段を備えた電動機

Publications (1)

Publication Number Publication Date
WO1994027353A1 true WO1994027353A1 (fr) 1994-11-24

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Application Number Title Priority Date Filing Date
PCT/JP1994/000807 WO1994027353A1 (fr) 1993-05-19 1994-05-19 Moteur electrique dote d'un moyen de refroidissement

Country Status (2)

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JP (1) JPH06335200A (fr)
WO (1) WO1994027353A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6911899B1 (en) 1996-12-16 2005-06-28 Commissariat A L'energie Atomique Method and device for remote identification
FR2934931A1 (fr) * 2008-08-10 2010-02-12 Renault Sas Refroidissement d'un systeme comprenant un generateur electrique et un moteur thermique
CN104471842A (zh) * 2012-07-05 2015-03-25 雷米技术有限公司 具有冷却系统的电机和冷却电机的方法
WO2020195792A1 (fr) * 2019-03-26 2020-10-01 株式会社荏原製作所 Moteur à stator chemisé et pompe entraînée par celui-ci, et système de moteur-fusée et fusée à carburant liquide l'utilisant

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5013751B2 (ja) * 2006-05-30 2012-08-29 東芝機械株式会社 電動機
JP5601504B2 (ja) * 2010-05-31 2014-10-08 アイシン精機株式会社 回転電機
CN102832726B (zh) * 2012-08-17 2014-11-26 中国科学院电工研究所 一种混合型电机定子蒸发冷却系统
JP2020068578A (ja) * 2018-10-23 2020-04-30 本田技研工業株式会社 モータの冷却構造

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49105105A (fr) * 1973-02-12 1974-10-04
JPS5096913U (fr) * 1974-01-10 1975-08-13
JPS5548395U (fr) * 1978-09-27 1980-03-29
JPS5625349A (en) * 1979-08-08 1981-03-11 Nesanerebuitsuchi Arekusandoru Strucutre for supplying liquid to rotor of electric machine
JPS63262043A (ja) * 1987-02-13 1988-10-28 Reinboo Japan:Kk 回転駆動系の冷却機構
JPH0237562U (fr) * 1988-08-31 1990-03-13

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49105105A (fr) * 1973-02-12 1974-10-04
JPS5096913U (fr) * 1974-01-10 1975-08-13
JPS5548395U (fr) * 1978-09-27 1980-03-29
JPS5625349A (en) * 1979-08-08 1981-03-11 Nesanerebuitsuchi Arekusandoru Strucutre for supplying liquid to rotor of electric machine
JPS63262043A (ja) * 1987-02-13 1988-10-28 Reinboo Japan:Kk 回転駆動系の冷却機構
JPH0237562U (fr) * 1988-08-31 1990-03-13

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6911899B1 (en) 1996-12-16 2005-06-28 Commissariat A L'energie Atomique Method and device for remote identification
FR2934931A1 (fr) * 2008-08-10 2010-02-12 Renault Sas Refroidissement d'un systeme comprenant un generateur electrique et un moteur thermique
CN104471842A (zh) * 2012-07-05 2015-03-25 雷米技术有限公司 具有冷却系统的电机和冷却电机的方法
WO2020195792A1 (fr) * 2019-03-26 2020-10-01 株式会社荏原製作所 Moteur à stator chemisé et pompe entraînée par celui-ci, et système de moteur-fusée et fusée à carburant liquide l'utilisant

Also Published As

Publication number Publication date
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