201212495 六、發明說明： 【發明所屬之技術領域】 該發明是有關於一種旋轉式電機及風力發電系統，尤 其是有關於具備定子和轉子的旋轉式電機及使用旋轉式電 機的風力發電系統。 【先前技術】 以往，公知有具備定子和轉子的旋轉式電機（例如參 照專利文獻1 ) » 在上述專利文獻1中公開有一種旋轉式電機，其具備 :筒狀定子；轉子，被配置爲與定子內側隔開稍許間隔（ 氣隙），及軸流扇，與轉子的轉軸一體旋轉。該旋轉式電 機的軸流扇設置於在轉軸方向上離開轉子及定子的位置上 。而且，構成爲透過軸流扇隨著轉軸的旋轉而旋轉，而在 轉軸方向上向轉子及定子供給空氣。透過軸流扇而被供向 轉軸方向的空氣在被供給到筒狀定子的外周部的同時，經 由轉子及定子之間稍許的氣隙部分被供給到定子的內周部 。由此，對具有發熱源即繞組的定子進行冷卻。 〔先前技術文獻〕 〔專利文獻〕 專利文獻1:日本國特開平7-213018號公報 【發明內容】 -5- 201212495 〔發明欲解決之課題〕 但是，由於旋轉式電機的定子和轉子之間的氣隙部分 的間隔非常小，因此在上述專利文獻1所述的旋轉式電機 中’從軸流扇供給的空氣很難進入氣隙部分，從而很難被 供給到定子的內周部。因此，在上述專利文獻1所述的旋 轉式電機中，存在無法有效地對定子進行冷卻的問題。 本發明是爲了解決如上所述的課題而進行的，本發明 的一個目的在於提供一種旋轉式電機，能夠有效地對定子 進行冷卻。 〔解決問題之手段及發明效果〕 爲了達成上述目的，本發明第1方案中的旋轉式電機 具備：定子，具有繞組；及轉子，可旋轉地被配置在定子 內側，具有永久磁鐵，在內側設有沿軸向延伸的空氣流通 空間，轉子包括從轉子的內周面貫穿至外周面的第1通風 孔，定子包括設置在對應於第1通風孔的位置上並從定子 的內周面貫穿至外周面的第2通風孔。 在本發明第1方案的旋轉式電機中，如上所述，透過 將從轉子的內周面貫穿至外周面的第1通風孔設置在轉子 上，同時在對應於第1通風孔的位置上將從定子的內周面 貫穿至外周面的第2通風孔設置在定子上，能夠經由轉子 的第1通風孔和定子的第2通風孔將空氣不僅供給至定子的 外周部，還供給至定子的內周部。由此，能夠有效地對具 有發熱源的定子進行冷卻。而且，由於還能夠經由轉子的 -6- 201212495 第1通風孔和定子的第2通風孔將空氣供給至轉子的外周部 及內周部，因此還能夠有效地對轉子進行冷卻。 本發明第2方案中的風力發電系統具備：旋轉式電機 ，包括具有繞組的定子以及可旋轉地被配置在定子內側且 具有永久磁鐵並在內側設有沿軸向延伸的空氣流通空間的 轉子；及葉片，連接於旋轉式電機的轉子，旋轉式電機的 轉子具有從轉子的內周面貫穿至外周面的第1通風孔，旋 轉式電機的定子具有設置在對應於第1通風孔的位置上並 從定子的內周面貫穿至外周面的第2通風孔。 在本發明第2方案的風力發電系統中，如上所述，透 過將從轉子的內周面貫穿至外周面的第1通風孔設置在旋 轉式電機的轉子上，同時在對應於第1通風孔的位置上將 從定子的內周面貫穿至外周面的第2通風孔設置在旋轉式 電機的定子上，能夠經由轉子的第1通風孔和定子的第2通 風孔將空氣不僅供給至定子的外周部，還供給至定子的內 周部。由此，能夠有效地對具有發熱源的定子進行冷卻。 而且，由於還能夠經由轉子的第1通風孔和定子的第2通風 孔將空氣供給至轉子的外周部及內周部，因此還能夠有效 地對轉子進行冷卻。 【實施方式】 以下’根據附圖對本發明的實施方式進行說明。 參照圖1〜圖6，對本發明一個實施方式的風力發電系 統1 0 0的結構進行說明。另外，在本實施方式中，對將本 201212495 發明的旋轉式電機應用於風力發電系統的發電機1的例子 進行說明。發電機！是本發明的“旋轉式電機，，的一個例 子。 如圖1所示’風力發電系統1 〇〇由發電機1、用於收納 發電機1等的機艙2'轉子輪轂3、葉片4、塔架（支撐柱） 5構成。發電機1收納在機艙2的內部。而且，轉子輪轂3安 裝在發電機1的後述的轉軸21上。而且，在轉子輪轂3上安 裝有多個葉片4。而且，機艙2安裝在塔架5上。 如圖2所示，發電機1具備：本體部1〇，具有轉子2〇 ( 參照圖3)及定子30(參照圖3):及冷卻單元40，設置在 本體部1〇的上部。本體部10包括上面開放（參照圖3)的 箱狀本體框體1 1 ’冷卻單元4〇包括連接在本體框體11上部 的單元框體41。透過該本體框體11和單元框體41構成發電 機1整體的框體。由本體框體及單元框體41構成的發電 機1的框體內部爲密閉結構，與外部隔斷。另一方面，如 圖3及圖4所示，在冷卻單元40中設置有很多冷卻管42，一 端構成外氣導入口而另一端構成外氣排出口的很多冷卻管 42沿X方向貫穿單元框體41。而且’構成爲在這些冷卻管 42的內部流通利用後述的外部送風機43從發電機1的外部 導入的外部空氣。另外’轉子20及定子30分別是本發明的 ‘‘轉子”及“定子”的一個例子。而且’本體框體1 1及單 元框體4 1是本發明的“框體”的一個例子。 如圖3所示，本體部1 〇由收容在上述本體框體1 1內部 的轉子20及定子30構成。如圖4所示’在位於本體框體11 201212495 的X方向兩端的一對側面上分別設置有用於插入轉子20的 轉軸21的軸孔12。而且，在本體框體11的內部設置有內部 隔板，其由用於支撐定子30的X方向（軸向）兩端部的一 對支撐隔板1 3構成。另外，支撐隔板1 3是本發明的“內部 隔板”的一個例子。 如圖3及圖4所示，轉子20包括轉軸21、轉子芯22、連 接轉軸21及轉子芯22的肋23。如圖4所示，轉軸21分別透 過軸承21a可旋轉地被支撐在本體框體11的一對軸孔12上 。在該轉軸2 1的一端上安裝有轉子輪轂3 (參照圖1 )，該 轉子輪轂3安裝有葉片4(參照圖1)。另外，雖然圖4表示 經過轉軸2 1的軸中心及肋2 3 (參照圖3 )的縱剖視圖（XZ 剖面），但是爲了便於說明，對於轉子2 0的上側部分，圖 示偏離肋23的剖面。 如圖3所示，轉子芯22形成爲大致圓筒形，在內周側 透過沿半徑方向以放射狀延伸的多個肋23與轉軸21連接。 由此，轉子芯22可旋轉地被配置在定子30的內側。而且， 在轉子芯22的外周面上安裝有多個永久磁鐵22a。而且， 在轉子芯22的內周側形成有沿轉子芯22的軸向（X方向） 延伸的多個空氣流通空間22b。在本實施方式中，該空氣 流通空間22b由被大致圓筒形的轉子芯22的內周面包圍的 空間構成，透過沿軸向延伸的放射狀肋23而被分割爲多個 空間。 在本實施方式中，如圖4所示，轉子芯2 2由沿軸向（X 方向）隔開規定間隔而配置的多個轉子芯部24構成。各個 -9 - 201212495 轉子芯部24呈環狀。透過沿軸向排列環狀轉子芯部24，轉 子芯2 2整體呈大致圓筒形。而且，如圖5所示，在各轉子 芯部2 4之間配置有轉子隔片2 5，使各轉子芯部2 4之間的間 隔保持一定。各轉子芯部24透過焊接等牢固地連接於內周 側的肋23。因而’各轉子芯部24透過轉子隔片25保持間隔 ，並相互一體連接。在本實施方式中，透過上述多個轉子 芯部24之間的空隙，形成沿半徑方向貫穿轉子20 (轉子芯 22)的多個轉子通風孔26。另外，轉子芯部24、轉子隔片 25及轉子通風孔26分別是本發明的“部分轉子”、“隔片 ”及“第1通風孔"的一個例子。 由於轉子通風孔26由各轉子芯部24之間的空隙構成， 因此從轉子20的內周面（圓筒狀轉子芯22的內周面）貫穿 至轉子20的外周面。即，透過該轉子通風孔26，轉子20內 側的空氣流通空間22b和轉子20的外周部連通在一起。而 且，上述轉子通風孔2 6形成爲以等間隔11沿軸向（X方向 )排列，同時沿轉子20的（轉子芯22 )周方向延伸（參照 圖3)。而且，上述轉子通風孔26排列在轉子20 (轉子芯 22)軸向（X方向）的大致全長上。轉子通風孔26的軸向 寬度與透過轉子隔片25保持一定的各轉子芯部24之間的間 隔t2—致。另外，由於各轉子芯部24透過肋23連接，因此 在除配置有肋23的部分以外的區域中，沿周方向延伸的轉 子通風孔26貫穿轉子20。透過如此構成，轉子20構成爲可 經由多個轉子通風孔26使流入轉子芯22內周側的空氣流通 空間22b的空氣向外周側流出。 -10- 201212495 如圖3及圖4所示’定子3 0由定子芯3 1和繞組3 2構成。 定子30形成爲大致圓同形。大致圓筒形的定子芯31與轉子 20的轉軸21同軸，且配置爲與轉子20的外周面（永久磁鐵 2 2 a )隔開稍許間隙（氣隙）。在該定子芯3 1的X方向（軸 向）兩端以圓周狀設置有向半徑方向外側延伸的凸緣部 31a。如圖4所示’透過將該凸緣部31a嵌入支撐隔板13的 開口 13a而支撐定子30整體。另外，透過該支撐隔板13隔 斷定子3 0的內周側和定子3 0的外周（圓筒部分的外周面） 側。在定子芯3 1的內周面側設置有沿軸向（X方向）延伸 的多個槽3 1 b。繞組3 2被收納在定子芯3 1的槽3 1 b內，被設 置爲沿軸向從定子芯3 1的一端延伸至另一端。而且，繞組 3 2由例如可流過U相、V相及W相的3相電流的多個繞組構 成。 在本實施方式中，定子芯3 1由沿軸向隔開規定間隔的 多個定子芯部33以及連接多個定子芯部33的連接構件34 ( 參照圖3)構成。各個定子芯部33由例如在軸向（X方向） 上層畳的砂鋼板構成，且呈環狀。透過沿軸向排列上述環 狀定子芯部33，定子芯31整體呈大致圓筒形。而且，如圖 3所示，各定子芯部3 3透過配置於外周側的沿軸向（X方向 )延伸的多個連接構件34相互連接。上述連接構件34配置 爲以繞轉軸的規定的等角度間隔包圍定子芯3 1的外周。而 且，如圖5及圖6所示，在各轉子芯部33之間配置有定子隔 片3 5，使定子芯部3 3之間的間隔保持一定。該定子隔片3 5 配置在各繞組3 2彼此之間的位置（參照圖6 )上。由此， -11 - 201212495 各定子芯部33透過定子隔片35保持間隔，並透過連接構件 3 4相互一體連接。在本實施方式中，透過上述多個定子芯 部33之間的空隙，形成沿半徑方向貫穿定子30 (定子芯31 )的多個定子通風孔36。另外，定子芯部33、定子隔片35 及定子通風孔3 6分別是本發明的“部分定子”、“隔片” 及“第2通風孔”的一個例子。 如圖5及圖6所示，由於定子通風孔36由定子芯部33之 間的空隙構成，因此從定子30的內周面貫穿至外周面。而 且，如圖3所示，上述定子通風孔3 6形成爲以等間隔11沿 軸向排列，同時沿定子3 0 (定子芯3 1 )的周方向延伸。而 且，如圖4所示，上述定子通風孔3 6排列在定子3 0 (定子 芯31)軸向的大致全長上。如圖5所示，定子通風孔36的 軸向寬度與透過定子隔片35保持一定的各定子芯部33之間 的間隔t2—致。另外，由於各定子芯部33透過連接構件34 連接，因此在除配置有連接構件34的部分以外的區域中， 沿周方向延伸的定子通風孔36貫穿定子30。另外，如圖6 所示，在沿周方向延伸的定子通風孔3 6內，沿軸向延伸的 繞組32從定子芯31向外部露出。透過如此構成，定子30構 成爲可透過轉子20的轉子通風孔26使流入定子30內周面側 的空氣經由多個定子通風孔3 6從定子3 0的內周側向外周側 流出。 如圖5及圖6所示，在本實施方式中，在對應於轉子通 風孔26的位置上形成有定子通風孔36。具體爲，各個轉子 芯部24及定子芯部33的軸向（X方向）厚度具有大致相同 -12- 201212495 的大小11。而且，各轉子芯部2 4之間的轉子隔片2 5和各定 子心部33之間的疋子隔片35具有相同的厚度（軸向（X方 向）厚度）t2。其結果，各轉子通風孔26和各定子通風孔 3 6隔開相同的等間隔11沿軸向（X方向）排列，被配置爲 相互相對。因而，各轉子通風孔26和各定子通風孔36以相 同的寬度（軸向寬度）t2分別形成在軸向（X方向）的相 同位置上。而且，如上所述，各轉子通風孔26和各定子通 風孔36分別形成在轉子20 (轉子芯22 )和定子30 (定子芯 31)的大致全周上。因此，在本實施方式中，透過具有相 同寬度t2的轉子通風孔2 6和定子通風孔3 6，形成沿半徑方 向以直線狀（放射狀）延伸的通風孔，以貫穿轉子2 0及定 子30。 如圖3及圖4所示，冷卻單元40包括單元框體41、很多 冷卻管42、向冷卻管42供給發電機1外部的空氣（外部空 氣）的外部送風機43。而且，在單元框體41的內部設置有 內部送風機44，使由本體框體11及單元框體41的內部空間 構成的發電機1的內部空間內的空氣（內部空氣）循環。 單元框體41的下端（下端面）開放，該下端與本體框 體1 1的上端連接。由此，單元框體4 1的內部空間和本體框 體1 1的內部空間連通，構成密閉結構的發電機1的內部空 間。 內部送風機44被設置爲懸吊於單元框體41內部的上面 (頂板部分）。內部送風機4 4由徑流式風扇構成，該徑流 式風扇具有設置於下方的吸氣部44 a和朝向繞鉛垂軸（Z方 -13- 201212495 向）的旋轉方向外側的排氣部44b。內部送風機44配置在 位於轉子20的轉子通風孔26及定子30的定子通風孔36上方 的冷卻管42上方的位置上。而且，內部送風機44具有設置 在單元框體4丨上面的鼓風馬達44c，構成爲透過外部電力 供給而被驅動。即，內部送風機44 (鼓風馬達44c)透過 由外部電源供給的電力（外部電力）而與發電機1的發電 電力無關地被驅動。透過該鼓風馬達44c，內部送風機44 繞鉛垂軸被旋轉驅動。由此，內部送風機4 4被驅動爲，經 由吸氣部44a從下方抽吸內部空氣，從排氣部44b向旋轉方 向外側（水平方向外側）送出空氣。其結果，內部送風機 44構成爲在轉子20的轉子通風孔26及定子30的定子通風孔 3 6和冷卻單元4 0之間強制地形成使內部空氣循環的循環流 。另外’在後面詳細說明該內部空氣的循環（循環流）和 基於循環流的發電機1冷卻。 很多冷卻管42被設置爲分別沿軸向（X方向）平行延 伸並貫穿單元框體41。上述冷卻管42配置於具有轉子20及 定子30的本體部1〇的上方位置，且配置於內部送風機44的 下方位置（轉子20及定子30和內部送風機44之間的位置） 。而且，如圖3所示，很多冷卻管42被配置爲密佈在單元 框體41內部的寬度方向（與轉軸方向在水平面內正交的γ 方向）的整個寬度上’同時在Z方向上層疊。如圖4所示， 該冷卻管42的兩端與外’部連通，構成爲外部空氣在冷卻管 42的內部流通。另一方面，冷卻管42的外周面露出在單元 框體4 1的內部。因此’內部空氣的循環流穿過密集配置的 -14- 201212495 很多冷卻管42的外周面之間。由此’構成爲吸收了隨著發 電由定子30產生的熱量而被加熱的內部空氣在經過冷卻管 42之間時與冷卻管42內部的外部空氣進行熱交換，由此， 對發電機1 (轉子20及定子30)進行冷卻。 如圖2所示，在位於冷卻管42 —端側的單元框體4 1的 側面上安裝有2台外部送風機43。上述外部送風機43構成 爲內置未圖示的鼓風馬達，與內部送風機44一樣透過外部 電力供給而被驅動。如圖4所示，外部送風機43具有從發 電機1 (冷卻單元40 )的外部導入外部空氣，向很多冷卻 管42的一端側送入外部空氣的功能。由此，向冷卻管42內 供給冷卻用外部空氣。從一端供給來的外部空氣沿箭頭D 方向透過冷卻管42內並從冷卻管42的另一端排出。 另外，在本實施方式中，在本體框體11的內部及單元 框體4 1的內部設置有多個內部隔板，其形成內部空氣的循 環路徑。具體爲，內部隔板主要由支撐定子30的支撐隔板 1 3、設置在支撐隔板1 3上端部的在軸向（X方向）上相對 的一對第1傾斜隔板45 (參照圖4)、在寬度方向（Y方向 )上相對的一對第2傾斜隔板46 (參照圖3 )、配置在第1 傾斜隔板45及第2傾斜隔板46上部的水平隔板47 (參照圖3 )構成。另外’第1傾斜隔板4 5、第2傾斜隔板4 6及水平隔 板47是本發明的“內部隔板”的一個例子。 如上所述’支撐隔板1 3隔斷定子3 0的內周側和定子3 0 的外周側。透過該支撐隔板1 3，內部空氣僅從轉子2 0的空 氣流通空間22b以及轉子20和定子30之間的氣隙部分流入 -15- 201212495 如圖4所示，一對第1傾斜隔板45被設置爲與支撐隔板 13的上端和水平隔板47的軸向（X方向）端部連接。在一 對第1傾斜隔板45之間的區域形成內部空氣的吸氣路徑， 在各第1傾斜隔板45的外側區域（第1傾斜隔板45和單元框 體41內壁之間的區域）形成內部空氣的排氣路徑。在軸向 (X方向）上相對的一對第1傾斜隔板45構成爲以上端相互 接近的方式傾斜，使內部空氣的循環路徑變窄。另外，第 1傾斜隔板45形成爲被很多冷卻管42貫穿。 如圖3所示，一對第2傾斜隔板46被設置在本體框體1 1 的上端且與寬度方向（Y方向）的兩端部和水平隔板4 7連 接。而且，在寬度方向（Y方向）上相對的一對第2傾斜隔 板46構成爲以上端相互接近的方式傾斜，使內部空氣的循 環路徑變窄。 水平隔板47被設置爲橫跨單元框體41內部的寬度方向 (Y方向）的兩端。而且，水平隔板47被設置爲接近密佈 的冷卻管42的最上部，同時接近內部送風機44的下面。水 平隔板47在水平延伸的同時，具有形成在內部送風機44的 吸氣部44a的正下方位置上的開口部47a。 透過被上述支撐隔板13、第1傾斜隔板45及第2傾斜隔 板46、水平隔板47包圍的區域，形成從轉子20及定子30朝 向內部送風機々4的吸氣部44a的吸氣路徑。在此，在本實 施方式中，如圖4所示，透過以上端相互接近的方式傾斜 的各一對第1傾斜隔板45及第2傾斜隔板46、具有開口部 -16- 201212495 47a的水平隔板47，形成梯形四角錐狀（水平切除四角錐 上部的形狀）的吸氣路徑。由此，吸氣路徑被設置爲隨著 朝向吸氣部Oa (開口部47a )而吸氣路徑變窄，並且接近 吸氣部4 4 a的大小。 另一方面，透過支撐隔板1 3、第1傾斜隔板45、第2傾 斜隔板46及水平隔板47與框體（本體框體11及單元框體41 )內壁面之間的區域（吸氣路徑的外側區域），形成從內 部送風機44的排氣部44b沿內部隔板外側下降並朝向轉子 20的空氣流通空間22b的排氣路徑。 下面，對本實施方式的發電機1中的內部空氣的循環 (循環流）所引起的冷卻進行說明。 首先，透過來自未圖示的外部電源的外部電力供給， 驅動內部送風機44 (鼓風馬達44c )及外部送風機43。由 此，如圖4所示，在框體（本體框體11及單元框體41)內 部，從內部送風機44下面的吸氣部44a向上方抽吸內部空 氣，同時從內部送風機44外周部的排氣部4 4b向水平方向 外側送出內部空氣。 此時，如圖5所示，轉子20內面側的空氣流通空間22b 內的內部空氣透過來自吸氣部44a的抽吸，主要沿箭頭Cl 方向經過轉子20上側（上半部分）位置的轉子通風孔26， 移動（上升）至轉子20外周部（定子30的內周部）的氣隙 部分。由於轉子20透過與葉片4 (參照圖1 )連接的轉軸21 而旋轉，因此轉子通風孔26的內部空氣經過位置隨著轉子 2〇的旋轉而變化。在本實施方式中，由於轉子通風孔26在 -17- 201212495 轉子20的大致全周（除肋23以外）上沿周方向延伸，因此 與轉子20的旋轉角度無關，內部空氣能夠始終透過轉子通 風孔26。 而且，由於在轉子20軸向的大致全長上排列有多個轉 子通風孔26，因此內部空氣不會在軸向（X方向）的兩端 部和中央部出現不均從而流入轉子20的外周部（氣隙部分 )整體。在該氣隙部分，內部空氣與轉子2 0的外周部（永 久磁鐵22a的表面）、定子30的內周部（繞組32與繞組32 之間的齒部）接觸，對上述各部進行冷卻。由此，在轉子 20的外周部及定子30的內周部（氣隙部分），發電機1的 發熱源即繞組3 2和繞組3 2的周邊部位（槽3 1 b之間的齒部 、永久磁鐵22a附近）被有效地冷卻。另外，還從轉子20 及定子3 0的軸向（X方向）端部的氣隙部分稍稍流入內部 空氣。 接下來，透過來自吸氣部44a的抽吸，內部空氣沿氣 隙部分向上方的箭頭C2方向移動，並經過定子30的定子通 風孔36。如圖4所示，由於定子30透過支撐隔板13被固定 ，因此內部空氣主要向上方經過定子3 0上半部分的定子通 風孔36。而且，如圖6所示，在定子通風孔36內部，沿軸 向（X方向）延伸的繞組32從定子芯31 (定子芯部33)露 出。因此，內部空氣在經過定子通風孔36時，利用內部空 氣經過繞組32之間，而在繞組32外表面的大致全周上進行 冷卻。由此，可有效地冷卻發熱源即繞組32露出在定子通 風孔3 6內部的部分。 -18- 201212495 向上方（箭頭C2方向）經過定子通風孔36的內部空氣 向定子30 (定子芯31)的外周面流出。由於在定子3〇軸向 的大致全長上排列有多個沿周方向延伸的定子通風孔3 6， 因此內部空氣從定子30上半部分的外周面的大致整體（除 連接構件3 4的部分以外）流出。因此，定子3 0的外周面也 被有效地冷卻。 而且，如圖4所示，吸收了轉子20及定子30的熱量的 內部空氣流向定子30的上方，流入被第1傾斜隔板45、第2 傾斜隔板46及水平隔板47包圍的梯形四角錐狀的吸氣路徑 。由於在該空間內配置有很多冷卻管42，因此內部空氣穿 過上述冷卻管42的外周部之間，沿箭頭C3方向（參照圖4 及圖5)向上方的吸氣部44 a移動。此時，由於梯形四角錐 狀的吸氣路徑構成爲接近吸氣部44a的大小（開口部47a的 大小），因此在該梯形四角錐狀的吸氣路徑內，內部空氣 不會因滯流而妨礙流動，內部空氣順暢地流入吸氣部4 4 a 〇 在各冷卻管42內，利用透過外部電力供給而被驅動的 外部送風機4 3 ’低溫（溫度低於內部空氣）的外部空氣沿 箭頭D方向從一端流向另一端。內部空氣穿過各冷卻管42 之間而移動時’在冷卻管42內的低溫的外部空氣和吸熱後 的內部空氣之間發生熱交換’內部空氣被冷卻。由此，在 內部空氣流入吸氣部4 4 a的期間，內部空氣從轉子2 〇及定 子3 0吸收的熱量向外部放出。 流入吸氣部44 a後的內部空氣透過內部送風機44沿箭 -19- 201212495 頭C4方向從排氣部44b被送向水平方向外側。由此’內部 空氣被送出至排氣路徑。從排氣部44b送出的內部空氣在 第1傾斜隔板45和單元框體4 1的內壁之間沿箭頭C5方向下 降並流入本體框體1 1內。此時，由於內部空氣再次經過很 多冷卻管42之間，因此內部空氣再次被冷卻。 經過冷卻管42之間流入本體框體1 1內的內部空氣在被 後續的來自排氣部44b的氣流推壓的同時被吸氣部44 a抽吸 ，從而流入轉子20內側的空氣流通空間22b內（沿箭頭C6 方向移動）。由此，轉子20 (轉子芯22)的內周面被內部 空氣冷卻。其後，利用來自吸氣部44a的抽吸，內部空氣 再次流入轉子通風孔26 (箭頭C 1方向）。如此，以連接箭 頭C1〜C6的方式形成內部空氣的循環流。由此，包括發熱 源即繞組32的定子30的內周部、定子30的外周部、轉子20 的內周部及外周部透過內部空氣的循環流而被冷卻。 在本實施方式中，如上所述，透過將從轉子20的內周 面貫穿至外周面的轉子通風孔26設置於發電機1的轉子20 ’同時在對應於轉子通風孔26的位置上將從定子30的內周 面貫穿至外周面的定子通風孔36設置於發電機1的定子30 ’不僅能夠經由轉子20的轉子通風孔26和定子30的定子通 風孔36向定子30的外周部供給空氣，還能夠向定子3〇的內 周部供給空氣。由此’能夠有效地對具有發熱源的定子3 〇 進行冷卻。而且’由於還能夠經由轉子2〇的轉子通風孔26 和定子30的定子通風孔36將空氣供給至轉子2〇的外周部及 內周部’因此還能夠有效地對轉子2〇進行冷卻。 -20- 201212495 而且，在本實施方式中，如上所述，在轉子20的軸向 (X方向）上隔開間隔設置多個轉子通風孔2 6，同時在對 應於多個轉子通風孔26的位置上設置多個定子通風孔36» 透過如此構成，透過向多個轉子通風孔2 6及多個定子通風 孔3 6各自流入內部空氣，能夠在軸向（X方向）的大範圍 內對轉子20及定子30進行冷卻。 而且，在本實施方式中，如上所述，轉子通風孔26被 設置爲沿轉子20的周方向延伸，定子通風孔3 6被設置爲在 對應於轉子通風孔26的位置上沿周方向延伸。由此，能夠 在周方向的大範圍內對轉子20及定子30進行冷卻。尤其能 夠透過在繞轉軸2 1旋轉的轉子20的大致全周（除肋23的位 置以外）上以圓周狀設置轉子通風孔26，而與轉子20的旋 轉位置無關地始終使內部空氣流入轉子通風孔26。由此， 能夠更有效地對轉子20及定子30進行冷卻。 而且，在本實施方式中，如上所述，轉子20的轉子芯 22由沿轉軸方向（X方向）隔開間隔而配置的多個環狀轉 子芯部24構成，由多個轉子芯部24之間的空隙構成轉子通 風孔26。由此，能夠容易地在轉子20的大致全周上形成轉 子通風孔26，其從轉子20的內周部（圓筒狀轉子芯22的內 周面）貫穿至轉子20的外周部。 而且，在本實施方式中，如上所述，由沿轉子20的轉 軸方向（X方向）隔開間隔而配置的多個環狀定子芯部3 3 構成定子3 0 (定子芯3 1 )，由多個定子芯部3 3之間的空隙 構成定子通風孔36。由此，能夠容易地在定子30 (定子芯 -21 - 201212495 31)的大致全周上形成對應於轉子通風孔26的定子通風孔 36 ° 而且’在本實施方式中，如上所述，在多個轉子芯部 24之間配置有轉子隔片25 ’在多個定子芯部33之間配置有 定子隔片3 5。由此，如果使轉子隔片2 5和定子隔片3 5的厚 度相同’則能夠容易地使由多個轉子芯部24之間的空隙形 成的轉子通風孔26的位置與由多個定子芯部33之間的空隙 形成的定子通風孔3 6的位置一致。因此，由於能夠透過轉 子通風孔2 6和定子通風孔3 6形成通風孔，沿半徑方向以直 線狀貫穿轉子20和定子30，因此可使內部空氣容易通過。 其結果，能夠使內部空氣的流通量增大，更有效地進行冷 卻。 而且，在本實施方式中，如上所述，空氣流通空間 2 2b由被圓筒形轉子20的內周面包圍的空間構成。透過如 此構成，能夠容易地形成沿軸向（X方向）貫穿轉子20內 部的空氣流通空間22b。而且，透過空氣流通空間22b沿軸 向貫穿轉子20，能夠使流向轉子20內周部的內部空氣流入 量（通過量）增大。其結果，能夠更有效地對轉子2 0的內 周部進行冷卻。 而且，在本寶施方式中，如上所述，設置了收容有定 子30及轉子20的框體（本體框體η及單元框體41)和冷卻 單元40。而且，在轉子20的轉子通風孔26及定子30的定子 通風孔36和冷卻單元4〇之間設置有內部送風機44，其形成 使框體（本體框體1 1及單元框體4 1 )的內部空氣循環的循 -22- 201212495 環流。由此，透過在轉子通風孔26及定子通風孔3 6和冷卻 單元40之間使內部空氣循環，能夠經由轉子通風孔26及定 子通風孔36使從轉子20及定子30吸收的熱量向冷卻單元4〇 放出。 而且，在本實施方式中，如上所述，內部送風機44構 成爲透過外部電力供給而被驅動，強制地形成循環流。在 此’對於風力發電系統，與其它發電方式相比，天氣等的 影響較大，轉軸21的轉速偏差較大。因此，例如將與轉軸 一體旋轉的軸流扇用於內部送風機時，存在轉軸的轉速較 低時產生的風量變少，冷卻變得不充分的情況。在本實施 方式中，透過外部電力供給來驅動內部送風機44，因而不 會受到轉軸2 1的轉速等影響，能夠始終進行穩定的冷卻。 而且，在本實施方式中，如上所述，內部隔板（支撐 隔板1 3、第1傾斜隔板45、第2傾斜隔板46及水平隔板47 ) 構成爲形成如下循環路徑，循環流經過轉子通風孔2 6及定 子通風孔36到達冷卻單元40，從冷卻單元40流入轉子20的 空氣流通空間22b並再次到達轉子通風孔26。透過如此構 成，由於形成內部空氣的循環流經過轉子通風孔2 6及定子 通風孔36並從空氣流通空間22b流入並再次到達轉子通風 孔26的循環路徑，因此能夠抑制形成對冷卻無用的內部空 氣流動，可更有效地對轉子20及定子30進行冷卻。而且， 由於在循環路徑中途經過冷卻單元40，因此內部空氣不會 以不放出從轉子20及定子30吸收的熱量的方式進行循環。 由此，由於還能夠切實地進行內部空氣的放熱（排熱）’ -23- 201212495 因此能夠實現提高冷卻效率。 而且，在本實施方式中，如上所述，內部隔板（支撐 隔板1 3、第1傾斜隔板45、第2傾斜隔板46及水平隔板47 ) 被設置爲，在形成從定子30的定子通風孔36經由冷卻單元 40到達內部送風機44的吸氣部44a的循環流的吸氣路徑（ 參照箭頭C 1〜箭頭C3 )的同時，吸氣路徑隨著從定子3 0朝 向吸氣部44 a而變窄，並且接近吸氣部44a的吸氣口的大小 。由此，由於透過內部隔板形成的吸氣路徑自身接近吸氣 部44a的吸氣口的大小，因此能夠抑制在吸氣路徑內產生 內部空氣滯流。因此，能夠使內部空氣順暢地流入吸氣部 44a，同時能夠抑制產生對冷卻無用的內部空氣（在路徑 內形成滯流的內部空氣）。 而且，在本實施方式中，如上所述，冷卻單元40包括 :冷卻管42，配置在框體（本體框體11及單元框體41)內 部的定子30和內部送風機44之間，外部空氣（參照箭頭D )經過內部，同時框體（本體框體1 1及單元框體4 1 )的內 部空氣的循環流（參照箭頭C 1〜箭頭C6 )經過外周部；及 外部送風機43，向冷卻管42的內部供給外部空氣。由此， 由於利用外部送風機43使低溫（溫度低於吸熱後的內部空 氣）的外部空氣從冷卻管42內部的一端流通至另一端（箭 頭D方向），因此內部空氣經過冷卻管42的外周部時，能 夠高效地在吸熱後的內部空氣和冷卻管42內的外部空氣之 間進行熱交換（排熱）。 另外，應該認爲本次公開的實施方式的所有方面均爲 -24- 201212495 例示而並不進行限定。本發明的範圍不是由 的說明而是由技術方案的範圍示出’還包括 的範圍相等的意思及範圍內的所有變更。 例如，在上述實施方式中’雖然示出了 於風力發電系統的發電機的例子’但是本發 此。本發明可應用於風力發電系統以外的發 的發電機及馬達等旋轉式電機全體。 而且，在上述實施方式中’雖然示出了 軸上直接連接有轉子輪轂的風力發電系統的 發明並不局限於此。在本發明中，如圖7所: 也可以是在發電機的轉軸上介由齒輪（增速 子輪轂的風力發電系統。在圖7所示的風力f ，在機艙202內部收容有發電機1和齒輪206。 由該齒輪206連接於發電機1的轉軸21。本發 於這種增速式風力發電系統。 而且，在上述實施方式中，雖然示出了 間貫穿轉子軸向的例子，但是本發明並不局 發明中，也可以設置轉子的軸向一端開口而 孔狀空氣流通空間。 而且，在上述實施方式中，雖然示出了 子的內周面形成空氣流通空間的例子，但是 限於此。例如’也可以在實心的轉子上形成 氣流通空間。 而且’在上述實施方式中，雖然示出了 上述實施方式 在與技術方案 將本發明應用 明並不局限於 電系統所使用 在發電機的轉 例子，但是本 兩的變形例， 器）連接有轉 ^電系統2 0 0中 轉子輪轂3介 明也可以應用 使空氣流通空 限於此。在本 另一端封閉的 透過圓筒形轉 本發明並不局 一個或多個空 沿軸向（X方 -25- 201212495 向）隔開間隔而配置有多個轉子通風孔及定子通風孔的例 子，但是本發明並不局限於此。在本發明中，也可以分別 僅設置一個轉子通風孔及定子通風孔。 而且，在上述實施方式中，雖然示出了轉子通風孔及 定子通風孔分別形成爲以圓周狀延伸的例子，但是本發明 並不局限於此。在本發明中，轉子通風孔及定子通風孔也 可以形成爲圓形、矩形。而且，轉子通風孔及定子通風孔 也可以形成爲沿軸向延伸。 而且，在上述實施方式中，雖然示出了各轉子通風孔 及各定子通風孔構成爲以相同的一定間隔11被配置且具有 —定寬度（軸向寬度）t2的例子，但是本發明並不局限於 此。在本發明中，轉子通風孔及定子通風孔的配置間隔及 軸向寬度也可以不同。而且，多個轉子通風孔也可以分別 以不同的配置間隔被配置，具有不同的寬度。同樣，多個 定子通風孔也可以分別以不同的配置間隔被配置，具有不 同的寬度。 而且，在上述實施方式中，雖然示出了轉子（轉子芯 )由多個環狀轉子芯部形成，轉子通風孔由轉子芯部之間 的空隙形成的例子，但是本發明並不局限於此。在本發明 中，也可以透過在轉子芯上形成貫穿孔，而形成轉子通風 孔。轉于芯既可以由多個轉子芯部形成，也可以由單一構 件形成。 而且，在上述實施方式中，雖然示出了定子（定子芯 )由多個環狀定子芯部形成，定子通風孔由定子芯部之間 -26- 201212495 的空隙形成的例子，但是本發明並不局限於此。在本發明 中’也可以透過在定子芯上形成貫穿孔，而形成定子通風 孔。定子芯既可以由多個定子芯部形成，也可以由單一構 件形成。 而且’在上述實施方式中，雖然示出了在多個轉子芯 部之間配置有轉子隔片，在多個定子芯部之間配置有定子 隔片的例子’但是本發明並不局限於此。在本發明中，也 可以不設置轉子隔片及定子隔片》 而且’在上述實施方式中，雖然示出了設置有內部送 風機及外部送風機的例子，但是本發明並不局限於此。在 本發明中’也可以是不設置內部送風機及外部送風機的任 意一方或雙方的結構。 而且’在上述實施方式中，雖然示出了設置有透過外 部電力供給而被驅動的內部送風機及外部送風機的例子， 但是本發明並不局限於此。在本發明中，內部送風機及外 部送風機的任意一方或雙方例如也可以由隨著轉軸旋轉的 軸流扇構成。而且，也可以構成爲利用由發電機發出的電 力來驅動內部送風機及外部送風機。 而且’在上述實施方式中，雖然示出了將內部送風機 配置於單元框體內部的上面（頂板部分）位置的例子，但 .是本發明並不局限於此。在本發明中，也可以將內部送風 機配置在本體框體側。 而且，在上述實施方式中’雖然示出了設置有多個內 部隔板（支撐隔板1 3、第1傾斜隔板4 5、第2傾斜隔板4 6及 -27- 201212495 水平隔板47 )的例子，但是本發明並不局限於此。在本發 明中’也可以設置支撐隔板1 3、第1傾斜隔板45、第2傾斜 隔板46及水平隔板47中的任意一個或多個。而且，也可以 設置支撐隔板1 3、第1傾斜隔板45、第2傾斜隔板46及水平 隔板47以外的內部隔板。內部隔板設置爲可形成循環流即 可，可適當設計內部隔板的個數 '形狀。而且，在本發明 中，也可以不設置內部隔板。 而且，在上述實施方式中，雖然示出了內部隔板（支 撐隔板1 3、第1傾斜隔板45、第2傾斜隔板46及水平隔板47 )被設置爲，吸氣路徑隨著從定子朝向吸氣部而變窄，且 接近吸氣部的吸氣口大小的例子，但是本發明並不局限於 此。在本發明中，吸氣路徑也可以形成爲不變窄而是保持 一定大小。 而且，在上述實施方式中，雖然示出了設有冷卻單元 ，其具備外部空氣所經過的冷卻管和外部送風機的例子， 但是本發明並不局限於此。在本發明中，例如也可以設置 冷卻液經過冷卻管內部的液冷式冷卻單元。 【圖式簡單說明】 圖1是用於說明本發明一個實施方式的風力發電系統 的整體結構的模式圖。 圖2是表示圖1所示的一個實施方式的風力發電系統的 發電機的整體結構的立體圖。 圖3是表示與圖2所示的發電機轉軸正交的方向的剖面 •28- 201212495 的內部立體圖。 圖4是沿圖2所示的發電機轉軸的方向的縱剖視圖。 圖5是放大表示圖4所示的發電機的轉子及定子的放大 剖視圖。 圖6是表示與圖3所示的發電機轉軸正交的方向的剖面 中的轉子及定子的局部放大圖。 圖7是表示本發明一個實施方式的風力發電系統的變 形例的模式圖。 【主要元件符號說明】 1 :發電機（旋轉式電機） 4 :葉片 1 0 :本體框體（框體） 1 3 :支撐隔板（內部隔板） 2 0 :轉子（r 〇 t 〇 r ) 21 :轉軸 2 2 a :永久磁鐵 22b :空氣流通空間 24:轉子芯部（部分轉子） 2 5 :轉子隔片（隔片） 26 :轉子通風孔（第1通風孔） 30 :定子（stator ) 3 2 :繞組 33:定子芯部（部分定子） -29- 201212495 3 5 :定子隔片（隔片） 36 :定子通風孔（第2通風孔） 40 :冷卻單元 41 :單元框體（框體） 42 :冷卻管 43 :外部送風機 44 :內部送風機 4 4 a :吸氣部 4 4b :排氣部 45 :第1傾斜隔板（內部隔板） 46 :第2傾斜隔板（內部隔板） 47 :水平隔板（內部隔板） 100、200 :風力發電系統 X方向：轉軸方向 -30-201212495 VI. Description of the invention: TECHNICAL FIELD The present invention relates to a rotary electric machine and a wind power generation system. In particular, there are a rotary electric machine having a stator and a rotor and a wind power generation system using a rotary electric machine. [Prior Art] In the past, A rotary electric machine including a stator and a rotor is known (for example, refer to Patent Document 1). In the above Patent Document 1, a rotary electric machine is disclosed. It has: Cylindrical stator Rotor, Is configured to be spaced slightly apart from the inside of the stator (air gap), And axial fan, Rotate integrally with the rotating shaft of the rotor. The axial fan of the rotary motor is disposed at a position away from the rotor and the stator in the direction of the rotation axis. and, It is configured to rotate through the axial fan along with the rotation of the rotating shaft. Air is supplied to the rotor and the stator in the direction of the rotating shaft. The air supplied to the direction of the rotation axis through the axial flow fan is supplied to the outer peripheral portion of the cylindrical stator, A slight air gap portion between the rotor and the stator is supplied to the inner peripheral portion of the stator. thus, The stator having the heat source, that is, the winding, is cooled. [Prior Art Document] [Patent Document] Patent Document 1: Japanese Patent Application Laid-Open No. Hei 7-213018 A SUMMARY OF THE INVENTION - 5 - 201212495 [Problems to be Solved by the Invention] However, Since the interval between the air gap portions between the stator and the rotor of the rotary electric machine is very small, Therefore, in the rotary electric machine described in the above Patent Document 1, the air supplied from the axial fan hardly enters the air gap portion. Therefore, it is difficult to be supplied to the inner peripheral portion of the stator. therefore, In the rotary motor described in the above Patent Document 1, There is a problem that the stator cannot be effectively cooled. The present invention has been made to solve the above problems, An object of the present invention is to provide a rotary electric machine, The stator can be effectively cooled. [Means for solving problems and invention effects] In order to achieve the above objectives, The rotary electric machine according to the first aspect of the present invention comprises: stator, With windings; And the rotor, Rotatingly placed inside the stator, With permanent magnets, There is an air circulation space extending in the axial direction on the inner side, The rotor includes a first ventilation hole penetrating from the inner circumferential surface of the rotor to the outer circumferential surface, The stator includes a second vent hole that is provided at a position corresponding to the first vent hole and penetrates from the inner circumferential surface of the stator to the outer circumferential surface. In the rotary electric machine according to the first aspect of the present invention, As mentioned above, The first vent hole penetrating from the inner circumferential surface of the rotor to the outer circumferential surface is provided on the rotor. At the same time, a second vent hole penetrating from the inner circumferential surface of the stator to the outer circumferential surface is provided on the stator at a position corresponding to the first vent hole. The air can be supplied not only to the outer peripheral portion of the stator but also through the first vent hole of the rotor and the second vent hole of the stator. It is also supplied to the inner peripheral portion of the stator. thus, It is possible to effectively cool the stator with a heat source. and, It is also possible to supply air to the outer peripheral portion and the inner peripheral portion of the rotor via the first vent hole of the rotor -6-201212495 and the second vent hole of the stator. Therefore, it is also possible to effectively cool the rotor. The wind power generation system according to the second aspect of the present invention includes: Rotary motor a stator including a stator and a rotor rotatably disposed inside the stator and having a permanent magnet and having an air flow space extending in the axial direction on the inner side; And the blade, Connected to the rotor of a rotary motor, The rotor of the rotary electric machine has a first vent hole penetrating from the inner circumferential surface of the rotor to the outer circumferential surface. The stator of the rotary electric machine has a second vent hole that is provided at a position corresponding to the first vent hole and penetrates from the inner circumferential surface of the stator to the outer circumferential surface. In the wind power generation system of the second aspect of the present invention, As mentioned above, The first vent hole penetrating from the inner circumferential surface of the rotor to the outer circumferential surface is provided on the rotor of the rotary electric machine. At the same time, the second vent hole penetrating from the inner circumferential surface of the stator to the outer circumferential surface is provided on the stator of the rotary electric machine at a position corresponding to the first vent hole. The air can be supplied not only to the outer peripheral portion of the stator but also through the first vent hole of the rotor and the second vent hole of the stator. It is also supplied to the inner peripheral portion of the stator. thus, It is possible to effectively cool the stator having a heat source. and, It is also possible to supply air to the outer peripheral portion and the inner peripheral portion of the rotor via the first vent hole of the rotor and the second vent hole of the stator. Therefore, it is also possible to effectively cool the rotor. [Embodiment] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Referring to Figures 1 to 6, The configuration of the wind power generation system 100 according to an embodiment of the present invention will be described. In addition, In the present embodiment, An example in which the rotary electric machine of the invention of 201212495 is applied to the electric generator 1 of the wind power generation system will be described. generator! Is the "rotary motor" of the present invention, , An example of this. As shown in Figure 1, the wind power system 1 is powered by the generator 1. a nacelle 2' rotor hub 3 for housing a generator 1 or the like, Blade 4, Tower (support column) 5 constitutes. The generator 1 is housed inside the nacelle 2. and, The rotor hub 3 is mounted on a rotating shaft 21 of a generator 1 which will be described later. and, A plurality of blades 4 are mounted on the rotor hub 3. and, The nacelle 2 is mounted on the tower 5. as shown in picture 2, Generator 1 has: The body part 1〇, It has a rotor 2〇 (refer to Figure 3) and a stator 30 (refer to Figure 3): And a cooling unit 40, It is placed on the upper part of the main body 1〇. The main body portion 10 includes a box-shaped main body casing 1 1 '', and the cooling unit 4'' includes a unit casing 41 connected to the upper portion of the main body casing 11. The main body casing 11 and the unit casing 41 constitute a casing of the entire generator 1. The inside of the casing of the power generator 1 including the main body casing and the unit casing 41 is a closed structure. Interrupted from the outside. on the other hand, As shown in Figure 3 and Figure 4, A plurality of cooling tubes 42 are disposed in the cooling unit 40, A plurality of cooling pipes 42 which constitute an outside air introduction port at one end and which constitute an outside air discharge port at the other end penetrate the unit casing 41 in the X direction. Further, the external air introduced from the outside of the generator 1 by an external blower 43 to be described later flows through the inside of these cooling pipes 42. Further, the rotor 20 and the stator 30 are examples of the "rotor" and the "stator" of the present invention, respectively. Further, the main body casing 1 1 and the unit casing 41 are examples of the "frame" of the present invention. As shown in Figure 3, The main body portion 1 is composed of a rotor 20 and a stator 30 housed inside the main body casing 1 1 . As shown in Fig. 4, a shaft hole 12 for inserting the rotating shaft 21 of the rotor 20 is provided on a pair of side surfaces located at both ends of the main body casing 11 201212495 in the X direction. and, An internal partition is disposed inside the body casing 11 . It is constituted by a pair of supporting partitions 13 for supporting both end portions of the stator 30 in the X direction (axial direction). In addition, The support spacer 13 is an example of the "internal spacer" of the present invention. As shown in Figure 3 and Figure 4, The rotor 20 includes a rotating shaft 21, Rotor core 22, The shaft 21 and the rib 23 of the rotor core 22 are connected. As shown in Figure 4, The rotary shaft 21 is rotatably supported by a pair of shaft holes 12 of the body casing 11 through bearings 21a, respectively. A rotor hub 3 is attached to one end of the rotating shaft 21 (refer to FIG. 1), The rotor hub 3 is mounted with blades 4 (see Fig. 1). In addition, 4 is a longitudinal sectional view (XZ cross section) showing the center of the shaft passing through the shaft 21 and the rib 2 3 (refer to FIG. 3). But for the sake of explanation, For the upper side of the rotor 20, The cross section of the rib 23 is shown. As shown in Figure 3, The rotor core 22 is formed in a substantially cylindrical shape. A plurality of ribs 23 extending radially in the radial direction are connected to the rotating shaft 21 on the inner peripheral side. thus, The rotor core 22 is rotatably disposed inside the stator 30. and, A plurality of permanent magnets 22a are attached to the outer peripheral surface of the rotor core 22. and, A plurality of air circulation spaces 22b extending in the axial direction (X direction) of the rotor core 22 are formed on the inner peripheral side of the rotor core 22. In the present embodiment, This air circulation space 22b is constituted by a space surrounded by the inner circumferential surface of the substantially cylindrical rotor core 22, It is divided into a plurality of spaces by radial ribs 23 extending in the axial direction. In the present embodiment, As shown in Figure 4, The rotor core 22 is composed of a plurality of rotor core portions 24 that are arranged at predetermined intervals in the axial direction (X direction). Each -9 - 201212495 rotor core 24 is annular. By arranging the annular rotor core 24 in the axial direction, The rotor core 2 2 has a substantially cylindrical shape as a whole. and, As shown in Figure 5, A rotor spacer 25 is disposed between each rotor core portion 24, The interval between the rotor cores 24 is kept constant. Each of the rotor core portions 24 is firmly connected to the ribs 23 on the inner peripheral side by welding or the like. Thus, the rotor cores 24 are kept spaced apart by the rotor spacers 25, And connected to each other. In the present embodiment, Through the gap between the plurality of rotor cores 24, A plurality of rotor vent holes 26 are formed which penetrate the rotor 20 (rotor core 22) in the radial direction. In addition, Rotor core 24, The rotor spacer 25 and the rotor venting hole 26 are respectively "partial rotors" of the present invention, "Separator" and "1st ventilation hole" An example of this. Since the rotor vents 26 are formed by the gaps between the rotor cores 24, Therefore, the inner circumferential surface of the rotor 20 (the inner circumferential surface of the cylindrical rotor core 22) penetrates to the outer circumferential surface of the rotor 20. which is, Through the rotor vents 26, The air circulation space 22b on the inner side of the rotor 20 communicates with the outer peripheral portion of the rotor 20. And, The rotor vents 26 are formed to be arranged at equal intervals 11 in the axial direction (X direction). At the same time, it extends along the circumferential direction of the rotor 20 (rotor core 22) (see Fig. 3). and, The rotor vent holes 26 are arranged substantially in the axial direction (X direction) of the rotor 20 (rotor core 22). The axial width of the rotor vents 26 coincides with the spacing t2 between the rotor cores 24 that are held through the rotor spacers 25. In addition, Since each rotor core 24 is connected through the rib 23, Therefore, in an area other than the portion where the rib 23 is disposed, A rotor venting hole 26 extending in the circumferential direction penetrates the rotor 20. Through this structure, The rotor 20 is configured to allow the air flowing into the air flow space 22b on the inner circumferential side of the rotor core 22 to flow out to the outer peripheral side via the plurality of rotor vent holes 26. -10-201212495 As shown in Figs. 3 and 4, the stator 30 is composed of a stator core 31 and a winding 32. The stator 30 is formed in a substantially circular shape. The substantially cylindrical stator core 31 is coaxial with the rotating shaft 21 of the rotor 20, Further, it is disposed to be spaced apart from the outer peripheral surface (permanent magnet 2 2 a ) of the rotor 20 by a slight gap (air gap). A flange portion 31a extending outward in the radial direction is circumferentially provided at both ends of the stator core 31 in the X direction (axial direction). As shown in Fig. 4, the entire stator 30 is supported by inserting the flange portion 31a into the opening 13a of the support spacer 13. In addition, The inner peripheral side of the stator 30 and the outer circumference (outer peripheral surface of the cylindrical portion) of the stator 30 are blocked by the support partition plate 13. A plurality of grooves 3 1 b extending in the axial direction (X direction) are provided on the inner peripheral surface side of the stator core 31. The winding 3 2 is housed in the slot 3 1 b of the stator core 31 It is disposed to extend from one end of the stator core 31 to the other end in the axial direction. and, Winding 3 2 can flow, for example, through the U phase, A plurality of windings of a three-phase current of a V phase and a W phase are formed. In the present embodiment, The stator core 31 is composed of a plurality of stator core portions 33 spaced apart from each other in the axial direction and a connecting member 34 (see Fig. 3) that connects the plurality of stator core portions 33. Each of the stator core portions 33 is composed of, for example, a sand steel plate which is layered in the axial direction (X direction). And in a ring shape. By arranging the above-mentioned annular stator core portion 33 in the axial direction, The stator core 31 as a whole has a substantially cylindrical shape. and, As shown in Figure 3, Each of the stator core portions 33 is connected to each other through a plurality of connecting members 34 that are disposed on the outer peripheral side and extend in the axial direction (X direction). The connecting member 34 is disposed to surround the outer circumference of the stator core 31 at a predetermined equiangular interval around the rotating shaft. And, As shown in Figure 5 and Figure 6, A stator spacer 35 is disposed between the rotor core portions 33, The interval between the stator core portions 3 3 is kept constant. The stator spacers 35 are disposed at positions between the respective windings 32 (see Fig. 6). thus, -11 - 201212495 Each stator core portion 33 is kept spaced through the stator spacer 35, And they are integrally connected to each other through the connecting member 34. In the present embodiment, Through the gap between the plurality of stator cores 33, A plurality of stator vent holes 36 penetrating the stator 30 (stator core 31) in the radial direction are formed. In addition, Stator core 33, The stator spacer 35 and the stator vent hole 36 are respectively "partial stators" of the present invention, An example of "separator" and "second vent". As shown in Figure 5 and Figure 6, Since the stator vents 36 are formed by the gaps between the stator cores 33, Therefore, it penetrates from the inner peripheral surface of the stator 30 to the outer peripheral surface. And, As shown in Figure 3, The stator vent holes 36 are formed to be aligned at equal intervals 11 in the axial direction. At the same time, it extends in the circumferential direction of the stator 30 (stator core 3 1 ). And, As shown in Figure 4, The stator vent holes 36 are arranged over substantially the entire length of the stator 30 (stator core 31) in the axial direction. As shown in Figure 5, The axial width of the stator vents 36 coincides with the interval t2 between the stator cores 33 held by the stator spacers 35. In addition, Since the stator cores 33 are connected through the connecting member 34, Therefore, in an area other than the portion where the connecting member 34 is disposed, A stator vent hole 36 extending in the circumferential direction penetrates the stator 30. In addition, As shown in Figure 6, In the stator vents 36 extending in the circumferential direction, The winding 32 extending in the axial direction is exposed to the outside from the stator core 31. Through this structure, The stator 30 is configured to pass through the rotor vent hole 26 of the rotor 20, and the air flowing into the inner peripheral surface side of the stator 30 flows out from the inner peripheral side to the outer peripheral side of the stator 30 through the plurality of stator vent holes 36. As shown in Figure 5 and Figure 6, In the present embodiment, A stator vent hole 36 is formed at a position corresponding to the rotor vent hole 26. Specifically, The axial (X-direction) thickness of each of the rotor core portion 24 and the stator core portion 33 has a size 11 which is substantially the same as -12 - 201212495. and, The rotor spacers 25 between the rotor core portions 24 and the braid spacers 35 between the stator core portions 33 have the same thickness (axial (X-direction) thickness) t2. the result, Each of the rotor vents 26 and each of the stator vents 36 are arranged at equal intervals 11 in the axial direction (X direction). They are configured to oppose each other. thus, Each of the rotor vent holes 26 and each of the stator vent holes 36 are formed at the same position in the axial direction (X direction) by the same width (axial width) t2. and, As mentioned above, Each of the rotor vent holes 26 and each of the stator vent holes 36 is formed on substantially the entire circumference of the rotor 20 (the rotor core 22) and the stator 30 (the stator core 31). therefore, In the present embodiment, Through the rotor vents 26 and stator vents 3 6 having the same width t2 Forming a vent hole extending linearly (radially) in the radial direction, It passes through the rotor 20 and the stator 30. As shown in Figure 3 and Figure 4, The cooling unit 40 includes a unit frame 41, Many cooling tubes 42, An external blower 43 that supplies air (outside air) outside the generator 1 to the cooling pipe 42 is supplied. and, An internal blower 44 is disposed inside the unit casing 41, The air (internal air) in the internal space of the generator 1 constituted by the internal space of the main body casing 11 and the unit casing 41 is circulated. The lower end (lower end surface) of the unit frame 41 is open, The lower end is connected to the upper end of the body casing 1 1. thus, The internal space of the unit casing 4 1 is connected to the internal space of the body casing 1 1 , The internal space of the generator 1 constituting the hermetic structure. The internal blower 44 is provided to be suspended from the upper surface (top plate portion) inside the unit casing 41. The internal blower 44 is composed of a radial fan. The radial fan has an intake portion 44a provided below and an exhaust portion 44b that faces outward in the rotational direction about the vertical axis (Z-direction - 13 - 201212495). The internal blower 44 is disposed at a position above the rotor vent 26 of the rotor 20 and the cooling duct 42 above the stator vents 36 of the stator 30. and, The internal blower 44 has a blower motor 44c disposed above the unit casing 4丨, It is configured to be driven by external power supply. which is, The internal blower 44 (the blower motor 44c) is driven by the electric power (external electric power) supplied from the external power source regardless of the electric power generated by the generator 1. Through the blower motor 44c, The internal blower 44 is rotationally driven around the vertical axis. thus, The internal blower 44 is driven to, The inside air is sucked from below by the suction portion 44a. Air is sent out from the exhaust portion 44b to the outside in the rotation direction (outside in the horizontal direction). the result, The internal blower 44 is configured to forcibly form a circulating flow for circulating the internal air between the rotor vent hole 26 of the rotor 20 and the stator vent hole 36 of the stator 30 and the cooling unit 40. Further, the circulation of the internal air (circulating flow) and the cooling of the generator 1 based on the circulating flow will be described in detail later. A plurality of cooling pipes 42 are provided to extend in parallel in the axial direction (X direction) and penetrate the unit casing 41, respectively. The cooling pipe 42 is disposed above the main body portion 1 of the rotor 20 and the stator 30, Further, it is disposed at a position below the internal blower 44 (a position between the rotor 20 and the stator 30 and the internal blower 44). and, As shown in Figure 3, A plurality of cooling pipes 42 are disposed so as to be densely overlapped in the width direction of the inside of the unit casing 41 (the entire width in the γ direction orthogonal to the rotation axis direction) while being stacked in the Z direction. As shown in Figure 4, Both ends of the cooling pipe 42 are in communication with the outer portion. The outside air is configured to flow inside the cooling pipe 42. on the other hand, The outer peripheral surface of the cooling pipe 42 is exposed inside the unit casing 41. Therefore, the circulating flow of internal air passes between the outer peripheral faces of many of the cooling tubes 42 in a densely packed configuration. Thus, the internal air heated to be absorbed by the heat generated by the stator 30 is exchanged with the outside air inside the cooling pipe 42 as it passes between the cooling pipes 42. thus, The generator 1 (the rotor 20 and the stator 30) is cooled. as shown in picture 2, Two external blowers 43 are attached to the side surface of the unit casing 41 on the end side of the cooling pipe 42. The external blower 43 is configured to include a blower motor (not shown). Like the internal blower 44, it is driven by external power supply. As shown in Figure 4, The external blower 43 has external air introduced from the outside of the generator 1 (cooling unit 40). The function of sending outside air to one end side of many cooling pipes 42 is given. thus, Cooling outside air is supplied into the cooling pipe 42. The outside air supplied from one end passes through the inside of the cooling pipe 42 in the direction of the arrow D and is discharged from the other end of the cooling pipe 42. In addition, In the present embodiment, A plurality of internal partitions are disposed inside the main body casing 11 and inside the unit casing 41. It forms a circular path of internal air. Specifically, The inner partition is mainly composed of a supporting partition supporting the stator 30. a pair of first inclined partition plates 45 (see FIG. 4) that are opposed to each other in the axial direction (X direction) of the upper end portion of the support partition plate 13 (see FIG. 4), a pair of second inclined partitions 46 (see FIG. 3) that face each other in the width direction (Y direction), The horizontal partition 47 (see FIG. 3) disposed on the upper portion of the first inclined partition 45 and the second inclined partition 46 is configured. In addition, the first inclined partition plate 45, The second inclined partition 46 and the horizontal partition 47 are examples of the "internal partition" of the present invention. The support spacer 13 blocks the inner peripheral side of the stator 30 and the outer peripheral side of the stator 30 as described above. Through the support partition 13 3, The internal air flows only from the air circulation space 22b of the rotor 20 and the air gap portion between the rotor 20 and the stator 30. -15-201212495 is as shown in FIG. A pair of first inclined partition plates 45 are provided to be connected to the upper end of the support partition plate 13 and the axial (X-direction) end portion of the horizontal partition plate 47. An intake path of the internal air is formed in a region between the pair of first inclined partition plates 45, An exhaust path of the inside air is formed in an outer region of each of the first inclined partition plates 45 (a region between the first inclined partition plate 45 and the inner wall of the unit casing 41). The pair of first inclined partition plates 45 that face each other in the axial direction (X direction) are inclined such that the upper ends are close to each other. Narrow the circulation path of the internal air. In addition, The first inclined partition plate 45 is formed to be penetrated by a plurality of cooling pipes 42. As shown in Figure 3, The pair of second inclined partition plates 46 are provided at the upper end of the main body casing 1 1 and are connected to both end portions in the width direction (Y direction) and the horizontal partition plate 47. and, The pair of second inclined partition plates 46 opposed in the width direction (Y direction) are configured such that the upper ends are inclined toward each other. Narrow the circulation path of the internal air. The horizontal partition plate 47 is disposed to extend across both ends in the width direction (Y direction) of the inside of the unit casing 41. and, The horizontal partition 47 is disposed close to the uppermost portion of the dense cooling pipe 42, At the same time, it is close to the bottom of the internal blower 44. The horizontal partition 47 extends horizontally, The opening 47a is formed at a position directly below the intake portion 44a of the internal blower 44. Through the above-mentioned supporting partition 13, The first inclined partition plate 45 and the second inclined partition plate 46, The area surrounded by the horizontal partition 47, An intake path from the rotor 20 and the stator 30 toward the intake portion 44a of the internal blower 4 is formed. here, In this embodiment, As shown in Figure 4, a pair of first inclined partition plates 45 and second inclined partition plates 46 that are inclined so as to be close to each other at the upper end a horizontal partition 47 having an opening portion -16 - 201212495 47a, An intake path is formed in a trapezoidal quadrangular pyramid shape (a shape in which the upper portion of the quadrangular pyramid is horizontally cut). thus, The intake path is set to be narrowed toward the intake portion Oa (opening portion 47a), And close to the size of the suction portion 4 4 a. on the other hand, Through the support partition 13 The first inclined partition 45, a region between the second inclined partition 46 and the horizontal partition 47 and the inner wall surface of the casing (the main body casing 11 and the unit casing 41) (the outer region of the intake path), An exhaust path is formed from the exhaust portion 44b of the inner blower 44 as it descends toward the outside of the inner partition and faces the air circulation space 22b of the rotor 20. below, The cooling caused by the circulation (circulation flow) of the internal air in the generator 1 of the present embodiment will be described. First of all, Through external power supply from an external power source not shown, The internal blower 44 (blow motor 44c) and the external blower 43 are driven. Therefore, As shown in Figure 4, Inside the casing (the main body casing 11 and the unit casing 41), The inside air is sucked upward from the suction portion 44a below the internal blower 44, At the same time, the internal air is sent out from the exhaust portion 44b of the outer peripheral portion of the internal blower 44 in the horizontal direction. at this time, As shown in Figure 5, The inside air in the air circulation space 22b on the inner surface side of the rotor 20 passes through the suction from the suction portion 44a. a rotor venting hole 26 passing through the upper side (upper half) of the rotor 20 mainly in the direction of the arrow C1, The air gap portion is moved (raised) to the outer peripheral portion of the rotor 20 (the inner peripheral portion of the stator 30). Since the rotor 20 is rotated through the rotating shaft 21 connected to the blade 4 (refer to FIG. 1), Therefore, the internal air passing position of the rotor vent 26 changes as the rotor 2 turns. In the present embodiment, Since the rotor vents 26 extend in the circumferential direction over substantially the entire circumference of the rotor 20 (excluding the ribs 23) from -17 to 201212495, Therefore, regardless of the angle of rotation of the rotor 20, The internal air can always pass through the rotor vents 26. and, Since a plurality of rotor vent holes 26 are arranged over substantially the entire length of the rotor 20 in the axial direction, Therefore, the internal air does not become uneven at both end portions and the central portion in the axial direction (X direction), and flows into the entire outer peripheral portion (air gap portion) of the rotor 20. In the air gap section, The inner air and the outer peripheral portion of the rotor 20 (the surface of the permanent magnet 22a), The inner peripheral portion of the stator 30 (the teeth between the windings 32 and the windings 32) is in contact with each other, The above parts are cooled. thus, In the outer peripheral portion of the rotor 20 and the inner peripheral portion (air gap portion) of the stator 30, The heat source of the generator 1 is the winding portion 3 2 and the peripheral portion of the winding 32 (the tooth portion between the groove 3 1 b , The vicinity of the permanent magnet 22a is effectively cooled. In addition, Further, the air gap from the end portion of the rotor 20 and the stator 30 in the axial direction (X direction) slightly flows into the internal air. Next, Through the suction from the suction portion 44a, The internal air moves in the direction of the upward arrow C2 along the air gap portion. It passes through the stator vents 36 of the stator 30. As shown in Figure 4, Since the stator 30 is fixed through the support partition 13, Therefore, the internal air mainly passes upward through the stator vent hole 36 of the upper half of the stator 30. and, As shown in Figure 6, Inside the stator vents 36, A winding 32 extending in the axial direction (X direction) is exposed from the stator core 31 (stator core portion 33). therefore, When the internal air passes through the stator vents 36, Using internal air between the windings 32, Cooling is performed over substantially the entire circumference of the outer surface of the winding 32. thus, The heat source, i.e., the portion of the winding 32 exposed inside the stator vent 360, can be effectively cooled. -18- 201212495 The air passing through the stator vent hole 36 upward (in the direction of the arrow C2) flows out to the outer circumferential surface of the stator 30 (stator core 31). Since a plurality of stator vent holes 3 6 extending in the circumferential direction are arranged over substantially the entire length of the stator 3 〇 axial direction Therefore, the internal air flows out from substantially the entire outer peripheral surface of the upper half of the stator 30 (except for the portion of the connecting member 34). therefore, The outer peripheral surface of the stator 30 is also effectively cooled. and, As shown in Figure 4, The internal air that has absorbed the heat of the rotor 20 and the stator 30 flows above the stator 30, Flowing into the first inclined partition 45, A trapezoidal quadrangular pyramidal suction path surrounded by the second inclined partition 46 and the horizontal partition 47. Since a lot of cooling pipes 42 are arranged in the space, Therefore, the internal air passes between the outer peripheral portions of the above-described cooling pipes 42, The air intake portion 44 a moves upward in the direction of the arrow C3 (see FIGS. 4 and 5 ). at this time, Since the trapezoidal quadrangular pyramidal suction path is configured to approach the size of the intake portion 44a (the size of the opening portion 47a), Therefore, in the trapezoidal quadrangular pyramidal suction path, The internal air does not interfere with the flow due to stagnation. The inside air smoothly flows into the suction portion 4 4 a 〇 in each of the cooling tubes 42 The external air blown by the external air blower 4 3 ' low temperature (the temperature is lower than the internal air) flows from one end to the other end in the direction of the arrow D. When the internal air moves between the respective cooling pipes 42, the heat exchange occurs between the low-temperature outside air in the cooling pipe 42 and the heat-absorbing internal air. The internal air is cooled. thus, While the internal air flows into the intake portion 4 4 a, The heat absorbed by the internal air from the rotor 2 and the stator 30 is discharged to the outside. The internal air that has flowed into the intake portion 44a is sent to the outside in the horizontal direction from the exhaust portion 44b in the direction C4 of the arrow -19-201212495 through the internal blower 44. Thereby, the internal air is sent to the exhaust path. The internal air sent from the exhaust portion 44b descends between the first inclined partition plate 45 and the inner wall of the unit casing 41 in the direction of the arrow C5 and flows into the main body casing 1 1. at this time, Since the internal air passes again between many cooling tubes 42, Therefore the internal air is cooled again. The inside air that has flowed into the body casing 1 through the cooling pipe 42 is sucked by the suction portion 44a while being pressed by the subsequent airflow from the exhaust portion 44b. Thereby, it flows into the air circulation space 22b inside the rotor 20 (moves in the direction of the arrow C6). thus, The inner circumferential surface of the rotor 20 (rotor core 22) is cooled by the internal air. Thereafter, Using the suction from the suction portion 44a, The internal air flows into the rotor vents 26 again (in the direction of arrow C1). in this way, A circulating flow of internal air is formed in such a manner as to connect the arrows C1 to C6. thus, The inner peripheral portion of the stator 30 including the heat source, that is, the winding 32, The outer circumference of the stator 30, The inner peripheral portion and the outer peripheral portion of the rotor 20 are cooled by a circulating flow of internal air. In the present embodiment, As mentioned above, The rotor vent hole 26 that penetrates from the inner circumferential surface to the outer circumferential surface of the rotor 20 is provided to the rotor 20' of the generator 1 while passing through the inner circumferential surface of the stator 30 to the outer circumferential surface at a position corresponding to the rotor vent hole 26. The stator vents 36 are provided in the stator 30' of the generator 1 not only to supply air to the outer peripheral portion of the stator 30 via the rotor vents 26 of the rotor 20 and the stator vents 36 of the stator 30, It is also possible to supply air to the inner peripheral portion of the stator 3A. Thereby, it is possible to effectively cool the stator 3 具有 having a heat source. Further, since it is also possible to supply air to the outer peripheral portion and the inner peripheral portion of the rotor 2 through the rotor vent holes 26 of the rotor 2 and the stator vent holes 36 of the stator 30, it is also possible to effectively cool the rotor 2A. -20- 201212495 Also, In the present embodiment, As mentioned above, A plurality of rotor vent holes 2 6 are provided at intervals in the axial direction (X direction) of the rotor 20. At the same time, a plurality of stator vents 36» are disposed at positions corresponding to the plurality of rotor vents 26, The internal air is flowed into each of the plurality of rotor vents 26 and the plurality of stator vents 36, The rotor 20 and the stator 30 can be cooled in a wide range in the axial direction (X direction). and, In the present embodiment, As mentioned above, The rotor vent hole 26 is provided to extend in the circumferential direction of the rotor 20, The stator vent hole 36 is disposed to extend in the circumferential direction at a position corresponding to the rotor vent hole 26. thus, The rotor 20 and the stator 30 can be cooled in a wide range in the circumferential direction. In particular, the rotor venting holes 26 can be circumferentially disposed through substantially the entire circumference of the rotor 20 that rotates about the rotating shaft 21 (except for the position of the ribs 23). Regardless of the rotational position of the rotor 20, internal air is always caused to flow into the rotor vents 26. thus, The rotor 20 and the stator 30 can be cooled more efficiently. and, In the present embodiment, As mentioned above, The rotor core 22 of the rotor 20 is composed of a plurality of annular rotor core portions 24 arranged at intervals in the direction of the rotation axis (X direction). The rotor vent 26 is formed by a gap between the plurality of rotor cores 24. thus, The rotor venting holes 26 can be easily formed on substantially the entire circumference of the rotor 20, This penetrates from the inner peripheral portion of the rotor 20 (the inner peripheral surface of the cylindrical rotor core 22) to the outer peripheral portion of the rotor 20. and, In the present embodiment, As mentioned above, A plurality of annular stator core portions 3 3 arranged at intervals in the direction of the rotation axis (X direction) of the rotor 20 constitute a stator 30 (stator core 3 1 ), The stator vents 36 are formed by the gaps between the plurality of stator cores 3 3 . thus, It is possible to easily form the stator vent hole 36° corresponding to the rotor vent hole 26 over substantially the entire circumference of the stator 30 (stator core - 21 - 201212495 31) and in the present embodiment, As mentioned above, A rotor spacer 25 is disposed between the plurality of rotor core portions 24'. A stator spacer 35 is disposed between the plurality of stator core portions 33. thus, If the thickness of the rotor spacer 25 and the stator spacer 35 is made the same, the position of the rotor vent hole 26 formed by the gap between the plurality of rotor cores 24 can be easily made to be the same by the plurality of stator cores 33. The positions of the stator vents 36 formed by the gaps are identical. therefore, Since the venting holes can be formed through the rotor vents 26 and the stator vents 36, The rotor 20 and the stator 30 are penetrated in a radial direction in a radial direction, Therefore, the internal air can be easily passed. the result, Can increase the amount of internal air circulation, Cool down more efficiently. and, In the present embodiment, As mentioned above, The air circulation space 2 2b is constituted by a space surrounded by the inner circumferential surface of the cylindrical rotor 20. Through this structure, The air circulation space 22b penetrating the inside of the rotor 20 in the axial direction (X direction) can be easily formed. and, The rotor 20 is axially penetrated through the air circulation space 22b. The amount of internal air inflow (through amount) flowing to the inner peripheral portion of the rotor 20 can be increased. the result, The inner peripheral portion of the rotor 20 can be cooled more efficiently. and, In the way of this treasure, As mentioned above, The casing (the main body casing η and the unit casing 41) in which the stator 30 and the rotor 20 are housed and the cooling unit 40 are provided. and, An internal blower 44 is disposed between the rotor venting opening 26 of the rotor 20 and the stator venting opening 36 of the stator 30 and the cooling unit 4? This forms a circulation of -22-201212495 which circulates the internal air of the casing (the main body casing 1 1 and the unit casing 4 1 ). thus, By circulating internal air between the rotor vents 26 and the stator vents 36 and the cooling unit 40, The heat absorbed from the rotor 20 and the stator 30 can be released to the cooling unit 4 through the rotor vent hole 26 and the stator vent hole 36. and, In the present embodiment, As mentioned above, The internal blower 44 is configured to be driven by external power supply. The circulation flow is forcibly formed. Here, for wind power systems, Compared with other power generation methods, The weather, etc. have a greater impact. The rotational speed deviation of the rotating shaft 21 is large. therefore, For example, when an axial fan that rotates integrally with the rotating shaft is used for an internal blower, When the rotation speed of the rotating shaft is low, the amount of wind generated is small. The case where cooling is insufficient. In this embodiment, The internal blower 44 is driven by an external power supply, Therefore, it is not affected by the rotation speed of the rotating shaft 2, Stable cooling is always possible. and, In the present embodiment, As mentioned above, Internal partition (support partition 13 , The first inclined partition 45, The second inclined partition 46 and the horizontal partition 47) are configured to form a circulation path as follows. The circulating flow passes through the rotor vents 26 and the stator vents 36 to the cooling unit 40. The cooling unit 40 flows into the air circulation space 22b of the rotor 20 and reaches the rotor vent hole 26 again. Through this composition, Since the circulating flow of the internal air passes through the rotor venting hole 26 and the stator venting hole 36 and flows in from the air circulating space 22b and reaches the circulation path of the rotor venting hole 26 again, Therefore, it is possible to suppress the formation of internal air flow that is useless for cooling, The rotor 20 and the stator 30 can be cooled more efficiently. and, Since the cooling unit 40 passes through the circulation path, Therefore, the internal air does not circulate so as not to release the heat absorbed from the rotor 20 and the stator 30. thus, Since the heat release of the internal air (heat removal) can be reliably performed -23-201212495, it is possible to improve the cooling efficiency. and, In the present embodiment, As mentioned above, Internal partition (support partition 13 , The first inclined partition 45, The second inclined partition 46 and the horizontal partition 47) are set to While forming an intake path (refer to arrows C1 to C3) of the circulating flow from the stator vent hole 36 of the stator 30 to the intake portion 44a of the internal blower 44 via the cooling unit 40, The suction path narrows as it goes from the stator 30 toward the suction portion 44a. And the size of the intake port of the intake portion 44a is approached. thus, Since the suction path formed by the internal partition itself approaches the size of the suction port of the suction portion 44a, Therefore, it is possible to suppress the occurrence of internal air stagnation in the intake path. therefore, The inside air can be smoothly flowed into the suction portion 44a, At the same time, it is possible to suppress the generation of internal air which is useless for cooling (the internal air which forms a stagnant flow in the path). and, In the present embodiment, As mentioned above, The cooling unit 40 includes: Cooling tube 42, It is disposed between the stator 30 inside the casing (the main body casing 11 and the unit casing 41) and the internal blower 44. The outside air (see arrow D) passes through the interior, At the same time, the circulating flow of the inner air (refer to the arrow C 1 to the arrow C6) of the frame body (the main body frame body 1 1 and the unit frame body 4 1 ) passes through the outer peripheral portion; And an external blower 43, External air is supplied to the inside of the cooling pipe 42. thus, Since the outside air of the low temperature (the temperature lower than the internal air after the heat absorption) flows from one end inside the cooling pipe 42 to the other end (in the direction of the arrow D) by the external blower 43, Therefore, when the internal air passes through the outer peripheral portion of the cooling pipe 42, Heat exchange (heat removal) between the internal air after the heat absorption and the outside air in the cooling pipe 42 can be efficiently performed. In addition, All aspects of the embodiments disclosed herein are considered to be exemplified and not limiting. The scope of the present invention is defined by the scope of the claims and the claims E.g, In the above embodiment, 'the example of the generator of the wind power generation system is shown', but this is the case. The present invention can be applied to all of a rotating electric machine such as a generator and a motor other than a wind power generation system. and, In the above embodiment, the invention of the wind power generation system in which the rotor hub is directly coupled to the shaft is not limited thereto. In the present invention, As shown in Figure 7: It can also be a wind power generation system with a gear on the shaft of the generator (increasing speed sub-hub. In the wind f shown in Figure 7, A generator 1 and a gear 206 are housed inside the nacelle 202. The gear 206 is connected to the rotating shaft 21 of the generator 1. The present invention was issued in this type of speed increasing wind power generation system. and, In the above embodiment, Although an example of the axial direction of the rotor is shown, However, the present invention is not invented, It is also possible to provide a hole-shaped air circulation space in which one end of the rotor is opened in the axial direction. and, In the above embodiment, Although an example in which the inner peripheral surface of the sub-division forms an air circulation space is shown, But it is limited to this. For example, it is also possible to form a gas circulation space on a solid rotor. And in the above embodiment, Although the above embodiment is shown in the application of the present invention and the technical solution is not limited to the example of the use of the generator in the electric system, However, the variants of the two, The rotor hub 3 can also be used in connection with the rotating system. The air circulation is limited to this. An example of a plurality of rotor vents and stator vents disposed at intervals along one or more of the empty axial directions (X-square - 25 - 201212495 direction) is closed at the other end. , However, the invention is not limited to this. In the present invention, It is also possible to provide only one rotor vent and stator vents, respectively. and, In the above embodiment, Although an example in which the rotor vent hole and the stator vent hole are respectively formed to extend in a circumferential shape is shown, However, the present invention is not limited to this. In the present invention, Rotor vents and stator vents can also be formed in a circular shape. rectangle. and, The rotor vent and the stator vent may also be formed to extend in the axial direction. and, In the above embodiment, Although it is shown that each of the rotor vent holes and each of the stator vent holes are configured to be disposed at the same constant interval 11 and have a constant width (axial width) t2, However, the present invention is not limited to this. In the present invention, The arrangement interval and axial width of the rotor vent and the stator vent may also be different. and, Multiple rotor vents can also be configured at different configuration intervals. Have different widths. same, Multiple stator vents can also be configured at different configuration intervals. Have different widths. and, In the above embodiment, Although it is shown that the rotor (rotor core) is formed by a plurality of annular rotor cores, An example in which the rotor vent is formed by a gap between the rotor cores, However, the invention is not limited to this. In the present invention, It is also possible to form a through hole in the rotor core. The rotor vents are formed. The turning core can be formed by a plurality of rotor cores. It can also be formed from a single member. and, In the above embodiment, Although it is shown that the stator (stator core) is formed by a plurality of annular stator cores, An example of a stator vent hole formed by a gap between the cores of the stator -26-201212495, However, the invention is not limited to this. In the present invention, it is also possible to form a through hole in the stator core. The stator vents are formed. The stator core can be formed by a plurality of stator cores. It can also be formed from a single member. And in the above embodiment, Although it is shown that a rotor spacer is disposed between a plurality of rotor cores, An example of a stator spacer is disposed between a plurality of stator cores. However, the present invention is not limited thereto. In the present invention, It is also possible not to provide the rotor spacer and the stator spacer" and in the above embodiment, Although an example in which an internal blower and an external blower are provided is shown, However, the invention is not limited to this. In the present invention, the configuration of either or both of the internal blower and the external blower may be omitted. And in the above embodiment, Although an example in which an internal blower and an external blower driven by an external power supply are provided is shown, However, the invention is not limited to this. In the present invention, Either or both of the internal blower and the external blower may be constituted by, for example, an axial fan that rotates with the rotating shaft. and, It is also possible to use the electric power generated by the generator to drive the internal blower and the external blower. And in the above embodiment, Although an example in which the internal blower is disposed at the upper surface (top plate portion) inside the unit casing is shown, but . It is the invention that is not limited thereto. In the present invention, the internal blower may be disposed on the body casing side. Further, in the above embodiment, 'there are a plurality of internal partition plates (the support partition plate 13, the first inclined partition plate 45, the second inclined partition plate 4 6 and the -27-201212495 horizontal partition plate 47). An example, but the invention is not limited thereto. In the present invention, any one or more of the support partition plate 13, the first inclined partition plate 45, the second inclined partition plate 46, and the horizontal partition plate 47 may be provided. Further, an inner partition other than the support partition plate 13, the first inclined partition plate 45, the second inclined partition plate 46, and the horizontal partition plate 47 may be provided. The inner partition is provided so as to form a circulating flow, and the number of the inner partitions can be appropriately designed. Further, in the present invention, the internal partition may not be provided. Further, in the above embodiment, the inner partition plate (the support partition plate 13, the first inclined partition plate 45, the second inclined partition plate 46, and the horizontal partition plate 47) is shown as being provided with the intake path An example in which the stator is narrowed toward the intake portion and is close to the size of the intake port of the intake portion, but the present invention is not limited thereto. In the present invention, the gettering path can also be formed to be not narrow but to maintain a certain size. Further, in the above embodiment, the cooling unit is provided with an example of a cooling pipe through which outside air passes and an external blower, but the present invention is not limited thereto. In the present invention, for example, a liquid-cooling type cooling unit through which the coolant passes through the inside of the cooling pipe may be provided. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view for explaining the overall configuration of a wind power generation system according to an embodiment of the present invention. Fig. 2 is a perspective view showing an overall configuration of a power generator of the wind power generation system of the embodiment shown in Fig. 1; Fig. 3 is an internal perspective view showing a section 28 to 201212495 in a direction orthogonal to the generator rotating shaft shown in Fig. 2; Fig. 4 is a longitudinal sectional view taken along the direction of the generator shaft shown in Fig. 2; Fig. 5 is an enlarged cross-sectional view showing the rotor and the stator of the generator shown in Fig. 4 in an enlarged manner. Fig. 6 is a partially enlarged view showing the rotor and the stator in a cross section in a direction orthogonal to the generator rotating shaft shown in Fig. 3; Fig. 7 is a schematic view showing a modified example of the wind power generation system according to the embodiment of the present invention. [Main component symbol description] 1 : Generator (rotary motor) 4 : Blade 1 0 : Main body frame (frame) 1 3 : Support spacer (internal diaphragm) 2 0 : Rotor (r 〇t 〇r ) 21: Shaft 2 2 a : Permanent magnet 22b : Air circulation space 24: Rotor core (partial rotor) 2 5 : Rotor spacer (separator) 26 : Rotor vent (1st vent) 30 : Stator 3 2 : Winding 33: Stator core (partial stator) -29- 201212495 3 5 : Stator spacer (separator) 36 : Stator vent (2nd vent) 40 : Cooling unit 41 : Unit frame (frame) 42: cooling pipe 43: external blower 44: internal blower 4 4 a : intake unit 4 4b : exhaust unit 45 : first inclined partition (internal partition) 46 : second inclined partition (internal partition) 47: Horizontal partition (internal partition) 100, 200: Wind power generation system X direction: direction of the shaft -30-