JP2004312898A - Rotor, stator, and rotating machine - Google Patents

Rotor, stator, and rotating machine Download PDF

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Publication number
JP2004312898A
JP2004312898A JP2003104110A JP2003104110A JP2004312898A JP 2004312898 A JP2004312898 A JP 2004312898A JP 2003104110 A JP2003104110 A JP 2003104110A JP 2003104110 A JP2003104110 A JP 2003104110A JP 2004312898 A JP2004312898 A JP 2004312898A
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Japan
Prior art keywords
stator
rotor
peripheral surface
hole
rotating machine
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JP2003104110A
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Japanese (ja)
Inventor
Tadanobu Toyama
忠信 當山
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Shinko Electric Co Ltd
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Shinko Electric Co Ltd
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Priority to JP2003104110A priority Critical patent/JP2004312898A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotor, a stator and a rotary machine that can effectively cool the inside of the stator. <P>SOLUTION: The rotor 20 comprises at least one axial hole 26 that axially extends from the end face in the axial direction, and at least one radial hole 28 that communicates to the axial hole 26 from the peripheral surface 2. When employing the rotating machine 1 of an embedded magnet type, the axial hole 26 of the rotor 20 serves as a permanent magnet installation hole. The stator 40 comprises a cooling duct 50 that is arranged with an air gap 38 spaced from the rotor 20, and communicates an intake 46 formed in the internal peripheral surface 6 and an injection hole 48 formed in the external peripheral surface 8, in the vicinity of an opening 30 at the peripheral surface of the radial hole 28. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
この発明は、電動機、発電機等の回転機において、冷却技術について改善を図った回転子、固定子および回転機に関するものである。
【０００２】
【従来の技術】
一般に、埋込磁石式同期発電機等の回転機は、固定子とハウジングとの間の間隙と、固定子と回転子とによって形成される空隙（エアギャップ）とに冷却空気を通過させて固定子を冷却するように構成されている。この構成によれば、固定子に発生した熱が、固定子表面の熱伝達等によって冷却空気に奪われ、固定子が冷却されるようになっている。
【０００３】
また、従来この種の冷却手段を備えた発電機、電動機等の回転機としては、回転子鉄心突出部のコイル内部に設けた中空スペーサ部材に冷却空気を通過させることにより、該鉄心とコイルの冷却効率を向上させたものが提供されている（例えば、特許文献１参照。）。
【０００４】
また、固定子の周囲を仕切板で覆い、冷却対象部分に、より多くの冷却空気を通過させることにより、固定子の冷却効率を向上させたものが提供されている（例えば、特許文献２参照。）。
【０００５】
また、回転軸に設けた油路から冷却油を供給し、回転子内の油路を通じることで回転子を冷却し、円周表面と表面近傍端面に設けた油留から冷却油を噴霧状に放出することで固定子を冷却するようにしたものが提供されている（例えば、特許文献３参照。）。
【０００６】
【特許文献１】
特開２００１−２１１６０７号公報（第２−３頁、第４図）
【特許文献２】
特開２０００−１４０８４号公報（第２−４頁、第１図）
【特許文献３】
特開２００１−１６８２６号公報（第２−４頁、第１、２図）
【０００７】
【発明が解決しようとする課題】
しかしながら、上記特許文献１に記載の回転機は、中空スペーサを回転子コイルに設けたものであり、中空スペーサを冷却空気が通過することで回転子コイルおよび鉄心は冷却されるが、固定子を冷却する手段を備えていないため固定子が冷却されないという問題がある。
また、上記特許文献２に記載の回転機は、仕切板を設けることにより冷却空気を固定子に効率的に導いて固定子を冷却するものであり、また上記特許文献３に記載の回転機も回転子内部に冷却油を通過させて回転子と固定子表面を冷却させるものであり、いずれも固定子内部を冷却する手段を備えていないため、固定子内部の冷却ができないという問題がある。
この発明は、このような事情を考慮してなされたもので、その目的は、従来冷却が困難だった回転機の固定子内部を効率的に冷却可能とする回転子、固定子、回転機を提供することを目的とする。
【０００８】
【課題を解決するための手段】
上記目的を達成するために、この発明は、以下の手段を提案している。
請求項１の発明は、回転子が、軸方向の端面から軸方向に延びる少なくとも１つの軸方向孔と、周面から前記軸方向孔に連通する少なくとも１つの径方向孔とを有することを特徴とする。
この発明に係る回転子によれば、軸方向孔から取込んだ冷却空気が、軸方向孔に連通する回転子の径方向孔を通じて開口部から回転子の周面側に供給され、この空気が固定子周面側に供給されることになる。したがって、固定子が効率的に冷却されることになる。
【０００９】
請求項２の発明は、前記請求項１において、埋込磁石式の回転機の回転子であって、前記軸方向孔が永久磁石取付孔であることを特徴とする。
この発明に係る回転子によれば、永久磁石取付孔から取込んだ冷却空気が、永久磁石取付孔に連通する回転子の径方向孔を通じて、開口部から周面側に供給され、この空気が固定子周面側に供給されることになる。したがって、固定子が効率的に冷却されることになる。
【００１０】
請求項３の発明は、請求項１または，請求項２に記載した回転子に対して、エアギャップを空けて配置される固定子であって、前記径方向孔の周面における開口部の近傍に、内周面に設けた取入口と外周面に設けられた放出口を連通する冷却ダクトを有することを特徴とする。
この発明に係る固定子によれば、回転子の周面における開口部から放出された冷却空気が、固定子の取入口から導入され冷却ダクトを経由して、放出口から放出されることになる。したがって、固定子内部を通過する空気によって、固定子が効率的に冷却されることになる。
【００１１】
請求項４の発明は、回転機が、請求項１または請求項２に記載した回転子と、請求項３に記載した固定子とを備えることを特徴とする。
この発明に係る回転機によれば、回転子の軸方向孔から取込まれた冷却空気が、軸方向孔に連通する径方向孔を通じて開口部から周面側に供給され、その後、固定子の取入口から取込まれ、冷却ダクトを経由して放出口から放出されることによって、固定子内部が効率的に冷却される。
【００１２】
【発明の実施の形態】
以下、図面を参照し、この発明の実施の形態について説明する。ここで説明する実施の形態は、この発明を埋込磁石同期発電機（以下、発電機という）に適用した場合の例である。
図１から図３は、本発明の第１の実施の形態を示す図であり、これらの図に示す発電機１は、回転子２０、固定子４０、ハウジング８０とを備え、回転子２０が軸受８２によってハウジング８０に回転自在に支承されており、回転子２０を囲むように固定子４０がハウジング８０に設けられている。図１において、Ｏは回転軸２２の中心軸線である。
【００１３】
回転子２０は、回転軸２２を中心に、その周囲にロータコア２４を配置して構成されている。ロータコア２４は、図２、図３に示す第１のロータコア鋼板（以下、第１のコア鋼鈑という）２４ａ、第２のロータコア鋼鈑（以下、第２のコア鋼鈑という）２４ｂを積層して構成されたものである。
第１の鋼板２４ａは、円板状の板体に中央部に回転軸２２を挿通するための回転軸孔２５を形成し、さらにその周囲に永久磁石３６を配置する永久磁石取付孔２６（以下、軸方向孔という）を環状配置したものである。
第２の鋼板２４ｂは、円板状の板体に中央部に回転軸２２を挿通するための回転軸孔２５を形成し、さらにその周囲に永久磁石３６を配置する軸方向孔２６を環状配置し、軸方向孔２６を半径方向外方に径方向孔２８により一体的に連通させて開口部３０において開放するようにしたものである。
第１の鋼板２４ａと第２のコア鋼鈑２４ｂは、図１の後述する固定子の空気取入口８４に対向する位置に、第２のコア鋼鈑２４ｂを配置し、その他の部分に第１の鋼板２４ａを配置して積層されたものである。
そして、図３に示すように、軸方向孔２６には、軸方向に向けて永久磁石３６が配置されている。
【００１４】
固定子４０は、スロット（図示せず）を有する環状の板体を複数枚積層し、各スロットに固定子巻線（図示せず）を巻回して構成されたものであり、回転子２０の周囲に一定の間隔のエアギャップ３８を保持して、ハウジング８０の内側に固定されている。
また、固定子４０は、回転子２０が停止した状態で回転子２０の開口部３０に対向する位置の内周面６に冷却空気の取入口４６を有しており、固定子４０の外周面８には放出口４８を有している。取入口４６と放出口４８との間は、冷却ダクト５０とされている。
図１に示すように、ハウジング８０は、軸受８２、空気取入口８４、空気排出口８６、風ガイド８８、送風ファン９０を備えている。風ガイド８８は、固定子４０のコイルエンド４４とハウジング８０に仕切面ができるように設けられている。
【００１５】
次に、上記の構成からなる本発明の発電機１の作用について説明する。
この発電機１において、駆動源によって回転軸２２が駆動されると、回転子２０が回転し、回転子２０に設けられた永久磁石３６の磁束によって固定子巻線に交流電圧が誘導され、固定子巻線から負荷側に電流が供給される。この場合、発電機１においては、固定子巻線に電流が流れ、固定子巻線に長時間にわたり電流が流れることによって、固定子巻線が発熱し、固定子４０の温度が上昇するが、この発電機１においては固定子４０が次のようにして冷却される。
すなわち、発電機１を冷却するために、送風ファン９０によって冷却空気がハウジング８０の空気取入口８４からハウジング８０内に取り入れる。
そして、ハウジング８０内部に取入れられた冷却空気が、回転子２０の両端面に設けられた軸方向孔２６の取入口から取入れられ、ロータコア２４内の径方向孔２８から開口部３０を通じて、外周面２側に放出される。開口部３０から放出された冷却空気は、固定子４０に設けられた空気取入口４６から、固定子４０内部に設けられた冷却ダクト５０を通過して、冷却空気の放出口４８から固定子４０の外部に放出される。その後、ハウジング８０の空気排出口８６を通じてハウジング８０の外部へ排出される。風ガイド８８は、ハウジング８０内に導入した冷却空気が、所定の冷却経路を経ずにハウジング８０の外部に放出されるのを防止する。
【００１６】
このようにして、固定子４０の内部の冷却ダクト５０を冷却空気が通過することによって、固定子４０の内部の熱が奪われ、固定子４０が冷却されることになる。
この場合、固定子４０内には、その軸方向の一定間隔おきに冷却ダクト５０が設けられているので、固定子４０内の冷却が効率よく均等に行われ、固定子４０全体が効率よく冷却されることになる。したがって、この発電機１においては、固定子４０の冷却を効率よく行うことができ、発電機１の性能、信頼性を向上させることができる。
また、永久磁石取付孔２６ａを流路として使用したことで、製造コストをほとんど増加させることなく、固定子４０内部に、大量の冷却空気を供給することができる。
【００１７】
図４は、この発明の第２の実施形態を示すものである。この実施の形態が、前述した第１の実施形態と異なる点は、回転子２０の軸方向孔２６の途中に仕切部材３２ａを設けた点である。
他は、上記第１の実施の形態と同様である。なお、上記の実施の形態と同一の部分については、同一の符号を付し、その説明を省略する。
この実施の形態においては、回転子２０の両端面の軸方向孔２６から取込まれた冷却空気は、軸方向孔２６内では交わることはないが、それぞれの軸方向孔２６に連通した径方向孔２８を通じて開口部３０から放出され、その後固定子４０に設けられた冷却ダクト５０を通過することで、第１の実施形態の場合同様、固定子４０の内部を冷却することができる。
【００１８】
図５は、この発明の第３の実施形態を示すものである。この実施の形態が、前述した第１の実施形態と異なる点は、回転子２０の軸方向孔２６の一方の端面に仕切部材３２ｂを設けた点である。
この第３の実施の形態においては、回転子２０の軸方向孔２６からの冷却空気の取込みは、一方の端面からのみであるが、第１の実施形態や第２の実施形態の場合同様、固定子４０の内部を冷却することができる。
【００１９】
図６は、この発明の第４の実施形態を示したものである。
この実施の形態が、前述した第１の実施形態と異なる点は、第２のコア鋼鈑２４ｂの構成である。すなわち、第１の実施の形態においては、軸方向孔２６を半径方向外方に一体的に連通させて開口部３０において開放するようにしたものであるが、この実施の形態においては、図３に示したように軸方向孔２６を径方向孔２８を通じて、それぞれ独立して外方に開放した点であり、他は、上記第１の実施の形態と同様である。
上記の各実施の形態において、回転子２０の径方向孔２８は、回転子２０の軸方向に複数設けられる構成であるが、この場合径方向孔２８の流路断面を適宜変更することによって、回転子２０の軸方向における各径方向孔２８を通過させる空気流量の均等化を図ることができる。
なお、上記の各実施の形態は、この発明を発電機１に適用した例であるが、この発明は電動機にも適用できるものである。
【００２０】
【発明の効果】
以上説明したように、請求項１に係る発明によれば、回転子の軸方向孔から取込んだ冷却空気が軸方向孔に連通する径方向孔を通じて開口部から回転子の周面側に供給されるので、固定子周面を効率的に冷却することができる。
また、請求項２に係る発明によれば、請求項１の軸方向孔として、永久磁石取付孔を使用するので、製造コストをほとんど増加させることなく固定子を効率的に冷却することができる。
また、請求項３に係る発明によれば、回転子側から供給された冷却空気を固定子の内部の冷却ダクトに通じるため、固定子を効率的よく冷却することが可能となる。
また、請求項４に係る発明によれば、回転子を通過させた冷却空気を固定子内の冷却ダクトに通じることによって、回転機の固定子を効率よく、均一に冷却することができる。
【図面の簡単な説明】
【図１】この発明の第１の実施形態に係る回転機の縦断面図である。
【図２】この発明の第１の実施形態に係る第１のコア鋼鈑である。
【図３】この発明の第１の実施形態に係る第２のコア鋼鈑である。
【図４】この発明の第２の実施形態に係る回転機の縦断面図である。
【図５】この発明の第３の実施形態に係る回転機の縦断面図である。
【図６】この発明の第４の実施形態に係る第２のコア鋼鈑である。
【符号の説明】
１：回転機 ２：回転子外周面（周面）
６：固定子内周面 ８：固定子外周面
２０ ：回転子 ２６：軸方向孔（永久磁石取付孔）
２８：径方向孔 ３０：開口部
３８：エアギャップ ４０：固定子
４６：空気取入口 ４８：空気放出口
５０：冷却ダクト[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor, a stator, and a rotating machine of a rotating machine such as an electric motor and a generator, which have improved cooling technology.
[0002]
[Prior art]
Generally, a rotating machine such as an embedded magnet type synchronous generator is fixed by passing cooling air through a gap between a stator and a housing and a gap (air gap) formed by the stator and the rotor. It is configured to cool the child. According to this configuration, the heat generated in the stator is taken by the cooling air due to heat transfer on the stator surface or the like, and the stator is cooled.
[0003]
Conventionally, as a rotating machine such as a generator or an electric motor provided with this type of cooling means, a cooling air is passed through a hollow spacer member provided inside a coil of a rotor core projecting portion, so that the core and the coil are cooled. A device with improved cooling efficiency is provided (for example, see Patent Document 1).
[0004]
Further, there has been provided a stator in which the periphery of the stator is covered with a partition plate and more cooling air is allowed to pass through a portion to be cooled, thereby improving the cooling efficiency of the stator (for example, see Patent Document 2). .).
[0005]
In addition, cooling oil is supplied from an oil passage provided on the rotating shaft, the rotor is cooled by passing through an oil passage in the rotor, and the cooling oil is sprayed from an oil reservoir provided on the circumferential surface and an end surface near the surface. (See, for example, Patent Document 3).
[0006]
[Patent Document 1]
JP 2001-212607 A (page 2-3, FIG. 4)
[Patent Document 2]
JP-A-2000-14084 (pages 2-4, FIG. 1)
[Patent Document 3]
JP 2001-16826 A (Pages 2-4, FIGS. 1 and 2)
[0007]
[Problems to be solved by the invention]
However, the rotating machine described in Patent Literature 1 is provided with a hollow spacer in the rotor coil, and the cooling coil passes through the hollow spacer to cool the rotor coil and the iron core. Since there is no cooling means, there is a problem that the stator is not cooled.
In addition, the rotating machine described in Patent Document 2 is provided with a partition plate to efficiently guide cooling air to the stator to cool the stator, and the rotating machine described in Patent Document 3 is also provided. The cooling oil is allowed to pass through the inside of the rotor to cool the rotor and the surface of the stator. Since neither of them has means for cooling the inside of the stator, there is a problem that the inside of the stator cannot be cooled.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a rotor, a stator, and a rotating machine that can efficiently cool the inside of the stator of the rotating machine, which has conventionally been difficult to cool. The purpose is to provide.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention proposes the following means.
The invention according to claim 1 is characterized in that the rotor has at least one axial hole extending in the axial direction from the axial end face, and at least one radial hole communicating from the peripheral surface to the axial hole. And
According to the rotor according to the present invention, the cooling air taken in from the axial hole is supplied to the peripheral surface side of the rotor from the opening through the radial hole of the rotor communicating with the axial hole, and this air is It will be supplied to the stator peripheral surface side. Therefore, the stator is efficiently cooled.
[0009]
According to a second aspect of the present invention, in the first aspect of the present invention, there is provided a rotor of an embedded magnet type rotating machine, wherein the axial hole is a permanent magnet mounting hole.
According to the rotor according to the present invention, the cooling air taken in from the permanent magnet mounting hole is supplied to the peripheral surface side from the opening through the radial hole of the rotor communicating with the permanent magnet mounting hole. It will be supplied to the stator peripheral surface side. Therefore, the stator is efficiently cooled.
[0010]
According to a third aspect of the present invention, there is provided a stator which is arranged with an air gap to the rotor according to the first or second aspect, wherein the vicinity of an opening in a peripheral surface of the radial hole is provided. In addition, a cooling duct is provided which communicates an inlet provided on the inner peripheral surface with a discharge port provided on the outer peripheral surface.
According to the stator according to the present invention, the cooling air discharged from the opening in the peripheral surface of the rotor is introduced from the intake of the stator, is discharged from the discharge port via the cooling duct. . Therefore, the stator is efficiently cooled by the air passing through the inside of the stator.
[0011]
According to a fourth aspect of the present invention, a rotating machine includes the rotor according to the first or second aspect and the stator according to the third aspect.
According to the rotating machine according to the present invention, the cooling air taken in from the axial hole of the rotor is supplied to the peripheral surface side from the opening through the radial hole communicating with the axial hole. The inside of the stator is efficiently cooled by being taken in from the inlet and discharged from the outlet through the cooling duct.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiment described here is an example in which the present invention is applied to an interior permanent magnet synchronous generator (hereinafter, referred to as a generator).
FIGS. 1 to 3 are views showing a first embodiment of the present invention. The generator 1 shown in these figures includes a rotor 20, a stator 40, and a housing 80, and the rotor 20 The housing 80 is rotatably supported by a bearing 82, and the stator 40 is provided on the housing 80 so as to surround the rotor 20. In FIG. 1, O is the center axis of the rotating shaft 22.
[0013]
The rotor 20 is configured by disposing a rotor core 24 around a rotation shaft 22. The rotor core 24 is formed by laminating a first rotor core steel plate (hereinafter, referred to as a first core steel plate) 24a and a second rotor core steel plate (hereinafter, referred to as a second core steel plate) 24b shown in FIGS. It is configured.
The first steel plate 24a has a disk-shaped plate formed with a rotation shaft hole 25 for inserting the rotation shaft 22 at the center thereof, and a permanent magnet mounting hole 26 (hereinafter, referred to as a permanent magnet mounting hole 26) around which a permanent magnet 36 is disposed. , Axial holes) are arranged in an annular shape.
The second steel plate 24b is formed in a disc-shaped plate body with a rotation shaft hole 25 for inserting the rotation shaft 22 in the center, and an axial hole 26 around which a permanent magnet 36 is disposed in an annular arrangement. The axial hole 26 is integrally communicated outward in the radial direction by a radial hole 28 so as to be opened at the opening 30.
In the first steel plate 24a and the second core steel plate 24b, a second core steel plate 24b is disposed at a position facing an air inlet 84 of a stator described later in FIG. Are arranged and laminated.
As shown in FIG. 3, a permanent magnet 36 is arranged in the axial hole 26 in the axial direction.
[0014]
The stator 40 is formed by laminating a plurality of annular plates having slots (not shown) and winding a stator winding (not shown) in each slot. It is fixed to the inside of the housing 80 while keeping the air gap 38 at regular intervals around it.
The stator 40 has a cooling air inlet 46 on the inner peripheral surface 6 at a position facing the opening 30 of the rotor 20 in a state where the rotor 20 is stopped. 8 has an outlet 48. A cooling duct 50 is provided between the intake 46 and the discharge port 48.
As shown in FIG. 1, the housing 80 includes a bearing 82, an air inlet 84, an air outlet 86, a wind guide 88, and a blower fan 90. The wind guide 88 is provided such that a partition surface is formed between the coil end 44 of the stator 40 and the housing 80.
[0015]
Next, the operation of the generator 1 of the present invention having the above configuration will be described.
In the generator 1, when the rotating shaft 22 is driven by the driving source, the rotor 20 rotates, and an AC voltage is induced in the stator winding by the magnetic flux of the permanent magnet 36 provided on the rotor 20, thereby fixing the rotor. A current is supplied from the slave winding to the load side. In this case, in the generator 1, when the current flows through the stator winding and the current flows through the stator winding for a long time, the stator winding generates heat and the temperature of the stator 40 increases. In this generator 1, the stator 40 is cooled as follows.
That is, in order to cool the generator 1, cooling air is taken into the housing 80 from the air intake 84 of the housing 80 by the blower fan 90.
Then, the cooling air taken into the housing 80 is taken in from the inlets of the axial holes 26 provided on both end surfaces of the rotor 20, and from the radial holes 28 in the rotor core 24 through the openings 30, through the outer peripheral surface. Released to the two sides. The cooling air discharged from the opening 30 passes through an air inlet 46 provided in the stator 40, passes through a cooling duct 50 provided inside the stator 40, and passes through a cooling air discharge port 48 to the stator 40. Released to the outside. Thereafter, the air is discharged to the outside of the housing 80 through the air outlet 86 of the housing 80. The wind guide 88 prevents the cooling air introduced into the housing 80 from being discharged to the outside of the housing 80 without passing through a predetermined cooling path.
[0016]
In this way, when the cooling air passes through the cooling duct 50 inside the stator 40, heat inside the stator 40 is taken away, and the stator 40 is cooled.
In this case, since the cooling ducts 50 are provided at regular intervals in the axial direction in the stator 40, the cooling in the stator 40 is efficiently and uniformly performed, and the entire stator 40 is efficiently cooled. Will be done. Therefore, in this generator 1, the stator 40 can be efficiently cooled, and the performance and reliability of the generator 1 can be improved.
In addition, since the permanent magnet mounting hole 26a is used as a flow path, a large amount of cooling air can be supplied to the inside of the stator 40 without substantially increasing the manufacturing cost.
[0017]
FIG. 4 shows a second embodiment of the present invention. This embodiment differs from the first embodiment in that a partition member 32a is provided in the axial hole 26 of the rotor 20.
Others are the same as the first embodiment. The same parts as those in the above embodiment are denoted by the same reference numerals, and description thereof will be omitted.
In this embodiment, the cooling air taken in from the axial holes 26 on both end faces of the rotor 20 does not intersect in the axial holes 26, but the radial air communicated with the respective axial holes 26. By being discharged from the opening 30 through the hole 28 and then passing through the cooling duct 50 provided in the stator 40, the inside of the stator 40 can be cooled as in the case of the first embodiment.
[0018]
FIG. 5 shows a third embodiment of the present invention. This embodiment differs from the above-described first embodiment in that a partition member 32b is provided on one end face of the axial hole 26 of the rotor 20.
In the third embodiment, the cooling air is taken in from the axial hole 26 of the rotor 20 only from one end face. However, as in the first and second embodiments, the cooling air is taken in. The inside of the stator 40 can be cooled.
[0019]
FIG. 6 shows a fourth embodiment of the present invention.
This embodiment differs from the first embodiment in the configuration of the second core steel plate 24b. That is, in the first embodiment, the axial holes 26 are integrally connected to the outside in the radial direction so as to be opened at the openings 30. In this embodiment, however, FIG. Is the same as the first embodiment except that the axial holes 26 are independently opened outward through the radial holes 28 as shown in FIG.
In each of the above embodiments, a plurality of radial holes 28 of the rotor 20 are provided in the axial direction of the rotor 20. In this case, by appropriately changing the flow path cross section of the radial holes 28, It is possible to equalize the flow rate of the air passing through each radial hole 28 in the axial direction of the rotor 20.
Each of the above embodiments is an example in which the present invention is applied to the generator 1. However, the present invention is also applicable to an electric motor.
[0020]
【The invention's effect】
As described above, according to the first aspect of the present invention, the cooling air taken in from the axial hole of the rotor is supplied from the opening to the peripheral surface side of the rotor through the radial hole communicating with the axial hole. Therefore, the circumferential surface of the stator can be efficiently cooled.
According to the second aspect of the present invention, since the permanent magnet mounting hole is used as the axial hole of the first aspect, the stator can be efficiently cooled without substantially increasing the manufacturing cost.
According to the third aspect of the present invention, since the cooling air supplied from the rotor side is passed through the cooling duct inside the stator, the stator can be efficiently cooled.
According to the fourth aspect of the invention, the cooling air passed through the rotor is passed through the cooling duct in the stator, so that the stator of the rotating machine can be efficiently and uniformly cooled.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a rotating machine according to a first embodiment of the present invention.
FIG. 2 is a first core steel sheet according to the first embodiment of the present invention.
FIG. 3 is a second core steel sheet according to the first embodiment of the present invention.
FIG. 4 is a longitudinal sectional view of a rotating machine according to a second embodiment of the present invention.
FIG. 5 is a longitudinal sectional view of a rotating machine according to a third embodiment of the present invention.
FIG. 6 is a second core steel sheet according to a fourth embodiment of the present invention.
[Explanation of symbols]
1: Rotating machine 2: Rotor outer peripheral surface (peripheral surface)
6: Stator inner peripheral surface 8: Stator outer peripheral surface 20: Rotor 26: Axial hole (permanent magnet mounting hole)
28: Radial hole 30: Opening 38: Air gap 40: Stator 46: Air inlet 48: Air outlet 50: Cooling duct

Claims (4)

軸方向の端面から軸方向に延びる少なくとも１つの軸方向孔と、周面から前記軸方向孔に連通する少なくとも１つの径方向孔とを有する回転子。A rotor having at least one axial hole extending axially from an axial end face and at least one radial hole communicating from the peripheral surface to the axial hole. 埋込磁石式の回転機の回転子であって、
前記軸方向孔が永久磁石取付孔である請求項１記載の回転子。A rotor of an embedded magnet type rotating machine,
The rotor according to claim 1, wherein the axial hole is a permanent magnet mounting hole. 請求項１または，請求項２に記載した回転子に対して、エアギャップを空けて配置される固定子であって、
前記径方向孔の周面における開口部の近傍に、内周面に設けた取入口と外周面に設けられた放出口を連通する冷却ダクトを有する固定子。A stator which is arranged with an air gap to the rotor according to claim 1 or 2,
A stator having a cooling duct communicating with an inlet provided on an inner peripheral surface and a discharge outlet provided on an outer peripheral surface in the vicinity of an opening on a peripheral surface of the radial hole. 請求項１または，請求項２に記載した回転子と、請求項３に記載した固定子とを備える回転機。A rotating machine comprising: the rotor according to claim 1 or 2; and the stator according to claim 3.
JP2003104110A 2003-04-08 2003-04-08 Rotor, stator, and rotating machine Pending JP2004312898A (en)

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DE102005042543A1 (en) * 2005-09-07 2007-03-15 Siemens Ag Permanent-magnet synchronous machine for slowly rotating wind power plant, has counterpart provided as fastening part at magnet wheel, which is formed from two disk-shaped units and aligned bars that run axially perpendicular
JP2008086130A (en) * 2006-09-28 2008-04-10 Honda Motor Co Ltd Motor
WO2008059852A1 (en) * 2006-11-15 2008-05-22 Toyota Jidosha Kabushiki Kaisha Rotor cooling structure and rotor manufacturing method
EP1763121A3 (en) * 2005-09-07 2009-08-12 Kabushi Kaisha Toshiba Rotating electrical machine
JP2010104202A (en) * 2008-10-27 2010-05-06 Toshiba Corp Rotor of rotating electrical machine
JP2010534459A (en) * 2007-07-24 2010-11-04 パワー グループ インターナショナル インコーポレイテッド Apparatus and method for clamping and locking permanent magnets and using tilted concentrated flux magnets to improve cooling in rotating electrical machines
JP2011055645A (en) * 2009-09-02 2011-03-17 Mitsubishi Electric Corp Rotary electric machine
JP2011097725A (en) * 2009-10-29 2011-05-12 Mitsubishi Electric Corp Rotor, magnet-embedded motor, and electric compressor
WO2011066083A2 (en) * 2009-11-30 2011-06-03 Remy Technologies, L.L.C. Rotating directional coolant spray for electric machine
JP4737341B1 (en) * 2010-08-10 2011-07-27 株式会社安川電機 Rotating electric machine and wind power generation system
JP2011193623A (en) * 2010-03-15 2011-09-29 Nippon Soken Inc Rotary electric machine
JP2012095534A (en) * 2012-02-16 2012-05-17 Hitachi Ltd Permanent magnet-type rotary electric machine
KR101407948B1 (en) 2012-10-04 2014-07-03 한국에너지기술연구원 cooling system and method of power-generator
US20140265667A1 (en) * 2013-03-15 2014-09-18 Ingersoll-Rand Company Electrical machine having cooling features
WO2014199769A1 (en) * 2013-06-10 2014-12-18 三菱電機株式会社 Rotating electric machine
DE102014009926A1 (en) 2013-07-12 2015-01-15 Fanuc Corporation Rotor with cooling channel and engine with such
KR20160043383A (en) * 2014-10-13 2016-04-21 재단법인한국조선해양기자재연구원 IPMSM(Interior Permanent Magnet Synchronous Motor) with forced air cooling structure for
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DE102005042543A1 (en) * 2005-09-07 2007-03-15 Siemens Ag Permanent-magnet synchronous machine for slowly rotating wind power plant, has counterpart provided as fastening part at magnet wheel, which is formed from two disk-shaped units and aligned bars that run axially perpendicular
EP1763121A3 (en) * 2005-09-07 2009-08-12 Kabushi Kaisha Toshiba Rotating electrical machine
US7705503B2 (en) 2005-09-07 2010-04-27 Kabushiki Kaisha Toshiba Rotating electrical machine
JP2008086130A (en) * 2006-09-28 2008-04-10 Honda Motor Co Ltd Motor
WO2008059852A1 (en) * 2006-11-15 2008-05-22 Toyota Jidosha Kabushiki Kaisha Rotor cooling structure and rotor manufacturing method
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JP2010534459A (en) * 2007-07-24 2010-11-04 パワー グループ インターナショナル インコーポレイテッド Apparatus and method for clamping and locking permanent magnets and using tilted concentrated flux magnets to improve cooling in rotating electrical machines
JP2010104202A (en) * 2008-10-27 2010-05-06 Toshiba Corp Rotor of rotating electrical machine
JP2011055645A (en) * 2009-09-02 2011-03-17 Mitsubishi Electric Corp Rotary electric machine
JP2011097725A (en) * 2009-10-29 2011-05-12 Mitsubishi Electric Corp Rotor, magnet-embedded motor, and electric compressor
WO2011066083A2 (en) * 2009-11-30 2011-06-03 Remy Technologies, L.L.C. Rotating directional coolant spray for electric machine
WO2011066083A3 (en) * 2009-11-30 2011-09-15 Remy Technologies, L.L.C. Rotating directional coolant spray for electric machine
CN102640400A (en) * 2009-11-30 2012-08-15 雷米技术有限公司 Rotating directional coolant spray for electric machine
JP2011193623A (en) * 2010-03-15 2011-09-29 Nippon Soken Inc Rotary electric machine
JP4737341B1 (en) * 2010-08-10 2011-07-27 株式会社安川電機 Rotating electric machine and wind power generation system
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CN102377266A (en) * 2010-08-10 2012-03-14 株式会社安川电机 Rotary motor and wind power generation system
JP2012095534A (en) * 2012-02-16 2012-05-17 Hitachi Ltd Permanent magnet-type rotary electric machine
KR101407948B1 (en) 2012-10-04 2014-07-03 한국에너지기술연구원 cooling system and method of power-generator
US9680351B2 (en) * 2013-03-15 2017-06-13 Ingersoll-Rand Company Electrical machine having cooling features
US20140265667A1 (en) * 2013-03-15 2014-09-18 Ingersoll-Rand Company Electrical machine having cooling features
WO2014199769A1 (en) * 2013-06-10 2014-12-18 三菱電機株式会社 Rotating electric machine
CN105324918A (en) * 2013-06-10 2016-02-10 三菱电机株式会社 Rotating electric machine
CN105324918B (en) * 2013-06-10 2017-12-01 三菱电机株式会社 Electric rotating machine
US9825495B2 (en) 2013-06-10 2017-11-21 Mitsubishi Electric Corporation Rotating electric machine
JP5951131B2 (en) * 2013-06-10 2016-07-13 三菱電機株式会社 Rotating electric machine
DE102014009926A1 (en) 2013-07-12 2015-01-15 Fanuc Corporation Rotor with cooling channel and engine with such
KR101628828B1 (en) * 2014-10-13 2016-06-09 재단법인한국조선해양기자재연구원 IPMSM(Interior Permanent Magnet Synchronous Motor) with forced air cooling structure for
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