JP4576309B2 - Rotating electric machine - Google Patents

Rotating electric machine Download PDF

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Publication number
JP4576309B2
JP4576309B2 JP2005272007A JP2005272007A JP4576309B2 JP 4576309 B2 JP4576309 B2 JP 4576309B2 JP 2005272007 A JP2005272007 A JP 2005272007A JP 2005272007 A JP2005272007 A JP 2005272007A JP 4576309 B2 JP4576309 B2 JP 4576309B2
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gas
stator
cooling gas
cooling
rotor
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JP2007089255A (en
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寛英 青木
千春 河瀬
清訓 古賀
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Description

この発明は、冷却ガスが封入されたケーシング内に固定子および回転子が収容され、ケーシング内部にガス冷却器を備えたタービン発電機等の回転電機に関するものである。   The present invention relates to a rotating electrical machine such as a turbine generator in which a stator and a rotor are housed in a casing in which cooling gas is sealed, and a gas cooler is provided inside the casing.

冷却ガスが封入されたケーシング内に固定子および回転子が収容され、ケーシング内にガス冷却器を備えた回転電機が、例えば特許文献１に開示されている。
特許文献１に開示された回転電機は、特許文献１の図１に示されているように、冷却ガスを封入したケーシング内に固定子、回転子が配設され、固定子は、鉄心部分の軸方向に適正間隔で外周方向に冷却ガスが通過する複数の冷却通路を備え、固定子の内周側にガス空隙を介して回転可能に支持された回転子が配置され、この回転子の軸端側にファンを備え、軸端部で軸受により回転自在に支持されている。固定子の軸方向端部および回転子の軸方向端部には、冷却ガスが流入するガス空間を形成する内側防風板を配置し、内側防風板とケーシングとの間に外側防風板を配置し、ファンから送出された冷却ガスを冷却器に導く第１の通風路と、固定子を冷却した冷却ガスをファンに導く第４の通風路を形成し、冷却器を出た冷却ガスを固定子鉄心の半径方向冷却通路に導く第２の通風路形成手段と、冷却ガスを固定子鉄心の端部に導く第３の通風路形成手段を備えた構成が示され、ガス冷却器は固定子の外周端部の冷却ガス通路に配置されている。 For example, Patent Document 1 discloses a rotating electrical machine in which a stator and a rotor are accommodated in a casing in which cooling gas is sealed, and a gas cooler is provided in the casing.
As shown in FIG. 1 of Patent Document 1, the rotating electrical machine disclosed in Patent Document 1 includes a stator and a rotor disposed in a casing filled with cooling gas. A rotor having a plurality of cooling passages through which cooling gas passes in the outer peripheral direction at appropriate intervals in the axial direction is disposed, and a rotor supported rotatably through a gas gap is disposed on the inner peripheral side of the stator. A fan is provided on the end side, and is rotatably supported by a bearing at the shaft end. At the axial end of the stator and the axial end of the rotor, an inner windbreak plate that forms a gas space into which cooling gas flows is disposed, and an outer windbreak plate is disposed between the inner windbreak plate and the casing. The first ventilation path for guiding the cooling gas sent from the fan to the cooler and the fourth ventilation path for guiding the cooling gas for cooling the stator to the fan are formed, and the cooling gas discharged from the cooler is fixed to the stator. A configuration including second ventilation path forming means for guiding the radial cooling passage of the iron core and third ventilation path forming means for guiding cooling gas to the end of the stator core is shown. It arrange | positions at the cooling gas channel | path of an outer peripheral edge part.

このように構成された回転電機では、ファンによって動圧を与えられた冷却ガスがベアリングブラケットおよび内側油切りのある方向に吹き出し、第１の通風路を通ってガス冷却器に至り、ガス冷却器で冷却された冷却ガスが固定子鉄心部の吸気セクションと、固定子鉄心端部と内側防風板とで囲われたセクションに分かれて流入し、固定子鉄心部の吸気セクションに流入した冷却ガスは、固定子鉄心の吸気セクションの通風ダクトを通過し、風導を通って内側防風板と外側防風板に囲われた第４の通風路を通りファンに至る。
固定子鉄心の端部と内側防風板とで囲まれたセクションに流入した冷却ガスは、一部は回転子に流入して回転子を冷却して固定子鉄心の排気セクションに合流し、他は固定子鉄心部を冷却した後、固定子鉄心の排気セクションに合流するように循環する。 In the rotating electric machine configured in this manner, the cooling gas given dynamic pressure by the fan blows out in the direction with the bearing bracket and the inner oil drain, passes through the first ventilation path, reaches the gas cooler, and the gas cooler The cooling gas cooled in step 1 flows into the intake section of the stator core and the section surrounded by the stator core end and the inner windbreak, and the cooling gas that flows into the intake section of the stator core The air passes through the ventilation duct of the intake section of the stator core, passes through the air guide, passes through the fourth ventilation path surrounded by the inner windbreak plate and the outer windbreak plate, and reaches the fan.
A part of the cooling gas that flows into the section surrounded by the end of the stator core and the inner windbreak plate flows into the rotor, cools the rotor, and joins the exhaust section of the stator core. After cooling the stator core, it is circulated so as to join the exhaust section of the stator core.

このように構成された従来の回転電機は、固定子鉄心中央部および固定子鉄心端部を冷却した冷却ガスは、ファンを通過した後にガス冷却器を通過し、ガス冷却器により冷却された冷却ガスが直接固定子鉄心側に送られるので、従来のようにファンのロスによる加熱が回避されるものである。また、ファンと軸受けの内側油切りの間のセクションがファンの流出側で正圧となっており、従来のようにベアリング室の油を機内に引き込むことがなくなるというものである。   In the conventional rotating electric machine configured as described above, the cooling gas that has cooled the central portion of the stator core and the end portion of the stator core passes through the fan, then passes through the gas cooler, and is cooled by the gas cooler. Since the gas is sent directly to the stator core side, heating due to fan loss is avoided as in the prior art. In addition, the section between the fan and the inner oil drain of the bearing has a positive pressure on the outflow side of the fan, so that the bearing chamber oil is not drawn into the machine as in the prior art.

特開平０６−２６１５００号公報Japanese Patent Laid-Open No. 06-261500

上記のように構成された特許文献１の回転電機は、ガス冷却器を通った冷却ガスが、直接固定子鉄心側に送られ、ファンのロスによる加熱が回避される構成であり、ファンと軸受けの内側油切りの間のセクションがファンの流出側で正圧となっており、ベアリング室の油を機内に引き込むことがなくなるという特徴を有するものである。
しかし、特許文献１の構成は、冷却ガスを軸方向に送出する冷却ファンを使用しているために、冷却ファンの軸方向の前後に大きなスペースを必要とし、回転軸の長さが長くなり回転電機の寸法が大きくなる問題点があった。 The rotating electric machine of Patent Document 1 configured as described above is configured such that the cooling gas that has passed through the gas cooler is sent directly to the stator core side, and heating due to fan loss is avoided. The section between the inner oil drainers has a positive pressure on the outflow side of the fan, and the oil in the bearing chamber is not drawn into the machine.
However, since the configuration of Patent Document 1 uses a cooling fan that sends cooling gas in the axial direction, a large space is required before and after the cooling fan in the axial direction, and the length of the rotation shaft becomes longer and the rotation becomes longer. There was a problem that the dimensions of the electric machine were large.

この発明は、回転電機の冷却ガス循環用冷却ファンを軸方向の前後にスペースを必要としない構成として回転軸の長さを短縮し、回転電機の小型化を図ることを目的とする。   SUMMARY OF THE INVENTION An object of the present invention is to reduce the length of a rotating shaft by reducing the length of the rotating shaft by using a cooling fan for circulating a cooling gas of the rotating electric device without requiring a space before and after the axial direction.

この発明に係る回転電機は、冷却ガスが封入されたケーシング内に配設され、軸方向に所定の間隔で冷却ガスが外周方向に通過する冷却ガス通路が設けられた固定子鉄心および固定子コイルからなる固定子と、この固定子の内周側に空隙を介して配置され、回転軸、回転軸に装着され回転子磁極を形成する回転子鉄心、回転子鉄心を励磁する回転子コイルからなり、回転軸の両端部が軸受により回転自在に支持された回転子と、固定子端部に端部ガス空間を形成する端部ガス空間仕切手段と、端部ガス空間仕切手段より軸受側の位置で回転軸に装着され、冷却ガスを軸心側から吸気し、外周方向に送出する遠心ファンと、この遠心ファンの周囲を囲い、端部ガス空間仕切手段より軸受側に配置されたガス風洞とからなる遠心送風機と、端部ガス空間仕切手段の外周部軸受側に配置され、流入する冷却ガスを通過させて冷却して端部ガス空間に送出する主ガス冷却器と、遠心送風機のガス風洞に接続され、ガス風洞から送出される冷却ガスを主ガス冷却器へ流入する反転風洞とを備えたものである。 A rotating electrical machine according to the present invention includes a stator core and a stator coil that are disposed in a casing in which a cooling gas is sealed, and are provided with cooling gas passages through which the cooling gas passes in the outer circumferential direction at predetermined intervals in the axial direction. And a rotor core that is arranged on the inner peripheral side of the stator via a gap and is attached to the rotation shaft, is attached to the rotation shaft to form a rotor magnetic pole, and a rotor coil that excites the rotor core. A rotor whose both ends of the rotating shaft are rotatably supported by bearings , end gas space partitioning means for forming an end gas space at the end of the stator, and a position closer to the bearing than the end gas space partitioning means A centrifugal fan that is mounted on the rotary shaft, sucks cooling gas from the axial center side, and sends it out in the outer circumferential direction , and a gas wind tunnel that surrounds the centrifugal fan and is arranged on the bearing side from the end gas space partitioning means. Centrifugal blower consisting of Is disposed on the outer peripheral portion bearing side space partitioning means, the main gas cooler is passed through a cooling gas flowing sent to the end gas space by cooling, connected to the gas wind tunnel of the centrifugal blower, it is sent from the gas wind tunnel And a reversing wind tunnel for flowing the cooling gas into the main gas cooler .

このように冷却ガスを遠心送風機により循環する構成にしたことにより、遠心送風機の軸方向前後に設ける空間が短くなり、従来の軸方向に流出する冷却ファンを使用した場合よりも回転軸が短くなり、回転電機の小型化が実現できる。   As described above, the cooling gas is circulated by the centrifugal blower, so that the space provided before and after the axial direction of the centrifugal blower is shortened, and the rotation axis is shorter than the case of using a conventional cooling fan that flows out in the axial direction. Therefore, it is possible to reduce the size of the rotating electrical machine.

実施の形態１．
実施の形態１の回転電機の構成を図１に示す。図１は回転電機の回転軸中心より上部を断面で示した半断面図である。
この回転電機は、固定子１０と、固定子１０の内径部に配置された回転子２０と、固定子１０の外周部を囲い冷却ガスを封入したケーシング２５と、ケーシング２５内に冷却ガスを循環させる遠心送風機３０と、冷却ガスを冷却する冷却ガス冷却器３５とで構成している。 Embodiment 1 FIG.
The configuration of the rotating electrical machine of the first embodiment is shown in FIG. FIG. 1 is a half cross-sectional view showing the upper part of the rotating electric machine from the center of the rotating shaft.
The rotating electrical machine includes a stator 10, a rotor 20 disposed on an inner diameter portion of the stator 10, a casing 25 that surrounds the outer periphery of the stator 10 and encloses cooling gas, and circulates the cooling gas in the casing 25. The centrifugal blower 30 is configured to include a cooling gas cooler 35 that cools the cooling gas.

固定子１０は、固定子鉄心１１が軸方向に所定の間隔で冷却ガス通路１１ａを設けた状態に積層され、固定子鉄心１１の内周部のスロットに固定子コイル１２が挿入された構成である。
回転子２０は、固定子１０の内周部にガス間隙Ｄが確保できる外径に製作され、回転軸２１と磁極を形成する回転子鉄心と回転子コイルが挿入された回転子鉄心部２２とで構成し、回転子鉄心部２２の内部には図示していないが冷却ガスの通路を設け、両端部で軸受２３により回転自在に支持している。
固定子１０の両端部には、端部ガス空間仕切手段１５で囲い、端部ガス空間Ｃを形成している。 The stator 10 has a configuration in which the stator core 11 is laminated in a state where cooling gas passages 11a are provided at predetermined intervals in the axial direction, and the stator coil 12 is inserted into a slot in the inner peripheral portion of the stator core 11. is there.
The rotor 20 is manufactured to have an outer diameter that can secure a gas gap D in the inner peripheral portion of the stator 10, and includes a rotor core 22 that forms a rotating shaft 21, a magnetic pole, and a rotor coil. Although not shown in the figure, a cooling gas passage is provided inside the rotor core portion 22 and is rotatably supported by bearings 23 at both ends.
An end gas space C is formed at both ends of the stator 10 by being surrounded by end gas space partitioning means 15.

回転軸２１両端部の端部ガス空間仕切手段１５の軸受側の位置に装着した遠心ファン３１と、この遠心ファン３１の周囲を囲い、端部ガス空間仕切手段１５の軸受側に配置し、冷却ガスが外周方向に流出するガス風洞３２とで遠心送風機３０を構成し、回転子２０が回転することにより、遠心ファン３１が回転して冷却ガスに動圧を与える。   A centrifugal fan 31 mounted at a position on the bearing side of the end gas space partitioning means 15 at both ends of the rotating shaft 21 and surrounding the centrifugal fan 31 and disposed on the bearing side of the end gas space partitioning means 15 for cooling The centrifugal air blower 30 is constituted by the gas wind tunnel 32 through which the gas flows in the outer peripheral direction, and the rotor 20 rotates, whereby the centrifugal fan 31 rotates to apply dynamic pressure to the cooling gas.

循環する冷却ガスの冷却する主ガス冷却器３５は、端部ガス空間仕切り手段１５の外周部軸受２３側に配置し、遠心送風機３０のガス風洞３２から送出される冷却ガスが固定子１０の外周側から主ガス冷却器３５に流入するように反転風洞３６により接続している。
冷却ガスは、主ガス冷却器３５に冷却水等の冷却媒体を循環させることにより熱交換されて冷却される。 The main gas cooler 35 for cooling the circulating cooling gas is disposed on the outer peripheral bearing 23 side of the end gas space partitioning means 15, and the cooling gas delivered from the gas wind tunnel 32 of the centrifugal blower 30 is the outer periphery of the stator 10. A reversing wind tunnel 36 is connected so as to flow into the main gas cooler 35 from the side.
The cooling gas is cooled by heat exchange by circulating a cooling medium such as cooling water through the main gas cooler 35.

回転電機内に封入されている冷却ガスは、回転子２０が回転することで遠心送風機３０によって軸心側から外周方向に送出され、ガス風洞内ガス通路Ａから反転風洞３６の反転空間Ｂで反転して主ガス冷却器３５に送られ、端部ガス空間Ｃに送出され、回転子２０の冷却通路と、固定子１０内径部と回転子２０の外径部との間のガス間隙Ｄとに流入し、固定子１０の冷却ガス通路１１ａを通過して固定子外周空間Ｅに送出され、固定子外周部空間Ｅで両端側に分かれて冷却ガス帰還通路Ｆを通り、遠心送風機３０の軸心側に帰還する循環経路で循環する。 The cooling gas sealed in the rotating electrical machine is sent from the axial center side to the outer circumferential direction by the centrifugal blower 30 as the rotor 20 rotates, and is inverted from the gas passage A in the gas wind tunnel in the reversing space B of the reversing wind tunnel 36. Are sent to the main gas cooler 35 and sent to the end gas space C to the cooling passage of the rotor 20 and the gas gap D between the inner diameter portion of the stator 10 and the outer diameter portion of the rotor 20. It flows in, passes through the cooling gas passage 11a of the stator 10 and is sent to the stator outer peripheral space E, is divided into both end sides in the stator outer peripheral space E, passes through the cooling gas return passage F, and passes through the cooling gas return passage F. It circulates in the circulation route returning to the side.

回転電機をこのように構成したことにより、冷却ガスを循環させる遠心送風機３０は、冷却ガスが軸心側から吸気して外周方向に送出し、ガス風洞３２から主ガス冷却器３５に流入し、遠心送風機３０の軸方向には空間を必要としないので、回転子１１の軸方向長さを短くすることができる。 By configuring the rotating electrical machine in this way, the centrifugal blower 30 for circulating the cooling gas sucks the cooling gas from the axial center side and sends it out in the outer peripheral direction, flows into the main gas cooler 35 from the gas wind tunnel 32, and Since no space is required in the axial direction of the centrifugal blower 30, the axial length of the rotor 11 can be shortened.

実施の形態２．
実施の形態１では、冷却ガスを冷却する主ガス冷却器３５を端部ガス空間形成手段１５の軸受２３側外周部に配置した構成としたが、実施の形態２は、実施の形態１の固定子１０の外周部にも補助冷却器４２を設けたものである。
実施の形態２の構成図を図２に示す。図２は図１と同様に回転電機の回転軸中心より上部を断面で示した半断面図である。 Embodiment 2. FIG.
In the first embodiment, the main gas cooler 35 that cools the cooling gas is arranged on the outer periphery of the end gas space forming means 15 on the bearing 23 side. However, the second embodiment is the same as the first embodiment. An auxiliary cooler 42 is also provided on the outer periphery of the child 10.
A configuration diagram of the second embodiment is shown in FIG. FIG. 2 is a half cross-sectional view showing the upper part from the center of the rotating shaft of the rotating electrical machine in the same manner as FIG.

図２において、固定子１０は、固定子鉄心１１が所定の間隔で冷却ガス通路１１ａを設けた状態に積層し、固定子鉄心１１の内周部に設けられたスロットに固定子コイル１２が挿入された構成である。回転子２０は、固定子１０の内周部にガス間隙Ｄが確保できる外径で、回転軸２１と磁極を形成する回転子鉄心と回転子コイルが挿入された回転子鉄心部２２とで構成し、回転子鉄心部２２の内部には冷却ガスの通路が設けられ、両端部で軸受２３により回転自在に支持された構成である。固定子１０の両端部を端部ガス空間仕切手段１５で囲い、端部ガス空間Ｃを形成した構成、回転軸２１両端部の端部ガス空間仕切手段１５の軸受２３側の位置に装着した遠心ファン３１と、この遠心ファン３１の周囲を囲い、端部ガス空間仕切手段１５の軸受側に配置したガス風洞３２とで遠心送風機３０を構成した点は実施の形態１の図１と同一である。
図１とは、固定子１０外周部に冷却ガス集合筒４１を設け、この部分に補助ガス冷却器４２を付加した点が相違している。 In FIG. 2, the stator 10 is laminated in a state in which the stator core 11 is provided with cooling gas passages 11 a at predetermined intervals, and the stator coil 12 is inserted into a slot provided in the inner peripheral portion of the stator core 11. It is the structure which was made. The rotor 20 is in outer diameter can be secured gas gap D in the inner periphery of the stator 10, a rotor core section 22 the rotor iron heart and the rotor coil is inserted to form the rotating shaft 21 and the pole And a cooling gas passage is provided inside the rotor core portion 22 and is rotatably supported by bearings 23 at both ends. A structure in which both end portions of the stator 10 are surrounded by the end gas space partitioning means 15 to form the end gas space C , and the centrifugally mounted at positions on the bearing 23 side of the end gas space partitioning means 15 at both ends of the rotating shaft 21. The centrifugal blower 30 is configured by the fan 31 and the gas wind tunnel 32 that surrounds the centrifugal fan 31 and is disposed on the bearing side of the end gas space partitioning means 15 , and is the same as in FIG. 1 of the first embodiment. .
This embodiment is different from FIG. 1 in that a cooling gas collecting cylinder 41 is provided on the outer peripheral portion of the stator 10 and an auxiliary gas cooler 42 is added to this portion.

このように固定子１０の外周部に補助ガス冷却器４２を付加すると、冷却性能が向上し、必要な冷却容量が主ガス冷却器３５と補助ガス冷却器４２に分担させることで主ガス冷却器３５の寸法が小さくなり、ケーシング２５の外径を小さくすることが可能となる。従って実施の形態１に比較してケーシング２５の外径が小さくなり、回転電機の寸法がさらに小型化できる。 When the auxiliary gas cooler 42 is added to the outer peripheral portion of the stator 10 in this manner, the cooling performance is improved, and the main gas cooler 35 and the auxiliary gas cooler 42 share the necessary cooling capacity, thereby allowing the main gas cooler to be shared. The dimension of 35 becomes small and it becomes possible to make the outer diameter of the casing 25 small. Therefore, the outer diameter of the casing 25 is reduced as compared with the first embodiment, and the dimensions of the rotating electrical machine can be further reduced.

実施の形態３．
実施の形態１および実施の形態２では、冷却ガスを循環させる遠心送風機３０の通風ダクト３２は１方向の場合について示したが、冷却された冷却ガスの固定子１０と回転子のガス間隙Ｄへ流入する循環経路が一経路のみであると、固定子１０の冷却ガス通路１１ａへの冷却ガス流量の偏りがあり、冷却効率があまりよくない。 Embodiment 3 FIG.
In the first embodiment and the second embodiment, the ventilation duct 32 of the centrifugal blower 30 that circulates the cooling gas is shown in one direction. However, the cooled cooling gas to the stator 10 and the rotor gas gap D is shown. If there is only one circulation path that flows in, the cooling gas flow rate to the cooling gas passage 11a of the stator 10 is uneven, and the cooling efficiency is not very good.

実施の形態３は、固定子１０と回転子２０の間のガス間隙Ｄに流入する冷却ガスの流入量を均一化にするように、遠心送風機３０から送出する冷却ガスが少なくとも２方向に送出されるガス風洞とし、固定子１０と回転子２０の間のガス間隙へは複数の方向から流入するように構成したものである。   In the third embodiment, the cooling gas sent from the centrifugal blower 30 is sent in at least two directions so that the amount of cooling gas flowing into the gas gap D between the stator 10 and the rotor 20 is made uniform. The gas wind tunnel is configured to flow into the gas gap between the stator 10 and the rotor 20 from a plurality of directions.

図３に冷却ガスを例えば３方向に送出する構成とした場合の遠心送風機の正面図を図３に示す。この遠心送風機５０は、回転軸２１に装着された遠心ファン５１と、遠心ファン５１の周囲を囲い３方に冷却ガスを送出する冷却ガス送出風洞５２を備え、図１に示した端部空間仕切手段１５の軸受２３側に配置したガス風洞５２とからなり、冷却ガス送出風洞５２の各冷却ガス送出口をそれぞれ主ガス冷却器３５に接続している。
回転電機の構成は実施の形態１の図１および実施の形態２の図２の構成と同一である。 FIG. 3 shows a front view of the centrifugal blower in the case where the cooling gas is sent in, for example, three directions. The centrifugal blower 50 includes a centrifugal fan 51 mounted on the rotary shaft 21 and a cooling gas delivery wind tunnel 52 that surrounds the periphery of the centrifugal fan 51 and sends out a cooling gas in three directions. The end space partition shown in FIG. It comprises a gas wind tunnel 52 disposed on the bearing 23 side of the means 15, and each cooling gas delivery port of the cooling gas delivery wind tunnel 52 is connected to the main gas cooler 35.
The configuration of the rotating electrical machine is the same as the configuration of FIG. 1 of the first embodiment and FIG. 2 of the second embodiment.

このように冷却ガスを複数の方向に送出する遠心送風機５０を使用すると、回転電機の固定子１０の内径と回転子２０の外径との間のガス間隙Ｄには少なくとも２方向から流入するので、冷却ガスは、固定子１０と回転子２０の間のガス間隙Ｄから固定子１０の冷却ガス通路１１ａにほぼ均一な流量で流入させることができ固定子１０内部がほぼ均一に冷却される。
図３の構成は冷却ガスの送出方向が２方向または４方向としてもよい。 When the centrifugal blower 50 that sends the cooling gas in a plurality of directions is used in this way, it flows into the gas gap D between the inner diameter of the stator 10 and the outer diameter of the rotor 20 of the rotating electrical machine from at least two directions. The cooling gas can be introduced from the gas gap D between the stator 10 and the rotor 20 into the cooling gas passage 11a of the stator 10 at a substantially uniform flow rate, so that the interior of the stator 10 is cooled substantially uniformly.
In the configuration of FIG. 3, the cooling gas delivery direction may be two or four directions.

実施の形態１の回転電機の構成を示す半断面図である。FIG. 3 is a half cross-sectional view showing the configuration of the rotating electrical machine of the first embodiment. 実施の形態２の回転電機の構成を示す半断面図である。FIG. 6 is a half cross-sectional view showing a configuration of a rotating electrical machine of a second embodiment. 冷却ガスを循環させる遠心送風機の正面図である。It is a front view of the centrifugal blower which circulates cooling gas.

符号の説明Explanation of symbols

１０ 固定子、１１ 固定子鉄心、１１ａ 冷却ガス通路、１２ 固定子コイル、
１５ 端部ガス空間仕切手段、２０ 回転軸、２２ 回転子鉄心部、２３ 軸受、
２５ ケーシング、３０ 遠心送風機、３１ 遠心ファン、３２ ガス風洞、
３５ 主ガス冷却器、３６ 反転風洞、４１ ガス集合筒、４２ 補助ガス冷却器、
５０ 遠心送風機、５１ 遠心ファン、５２ ガス風洞。 10 Stator, 11 Stator core, 11a Cooling gas passage, 12 Stator coil,
15 end gas space partitioning means, 20 rotating shaft, 22 rotor core, 23 bearing,
25 Casing, 30 Centrifugal blower, 31 Centrifugal fan, 32 Gas wind tunnel,
35 main gas cooler, 36 reversing wind tunnel, 41 gas collecting cylinder, 42 auxiliary gas cooler,
50 Centrifugal blower, 51 Centrifugal fan, 52 Gas wind tunnel.

Claims (3)

冷却ガスが封入されたケーシング内に配設され、軸方向に所定の間隔で冷却ガスが外周方向へ通過する冷却ガス通路が設けられた固定子鉄心および固定子コイルからなる固定子と、該固定子の内周側に空隙を介して配置され、回転軸、該回転軸に装着され回転子磁極を形成する回転子鉄心、該回転子鉄心を励磁する回転子コイルからなり、上記回転軸の両端部が軸受により回転自在に支持された回転子と、上記固定子端部に端部ガス空間を形成する端部ガス空間仕切手段と、上記端部ガス空間仕切手段より上記軸受側の位置で上記回転軸に装着され、冷却ガスを軸心側から吸気し、外周方向に送出する遠心ファンと、該遠心ファンの周囲を囲い、上記端部ガス空間仕切手段より上記軸受側に配置されたガス風洞とからなる遠心送風機と、上記端部ガス空間仕切手段の外周部軸受側に配置され、流入する冷却ガスを通過させて冷却し、上記端部ガス空間に送出する主ガス冷却器と、上記遠心送風機のガス風洞に接続され、該ガス風洞から送出される冷却ガスを上記主ガス冷却器へ流入する反転風洞とを備えたことを特徴とする回転電機。 A stator comprising a stator core and a stator coil provided in a casing in which cooling gas is sealed and provided with a cooling gas passage through which the cooling gas passes in the outer circumferential direction at predetermined intervals in the axial direction; The rotor is disposed on the inner peripheral side of the rotor via a gap, and includes a rotating shaft, a rotor core that is attached to the rotating shaft and forms a rotor magnetic pole, and a rotor coil that excites the rotor core. a rotor part is rotatably supported by a bearing, and the end gas space partitioning means for forming an end gas space above the stator end, above the position of the bearing side of the end gas space partition means A centrifugal fan that is mounted on the rotary shaft, sucks cooling gas from the axial center side, and sends it out in the outer circumferential direction , and a gas wind tunnel that surrounds the centrifugal fan and is arranged on the bearing side from the end gas space partitioning means A centrifugal blower comprising: Parts are disposed on the outer peripheral portion bearing side of the gas space partitioning means, passed through a cooling gas flowing cooled, the main gas cooler to be sent to the end gas space, connected to the gas wind tunnel of the centrifugal blower, the A rotating electrical machine comprising: a reversing wind tunnel for flowing cooling gas delivered from a gas wind tunnel into the main gas cooler . 上記固定子外周部を囲い固定子外周部に外周部ガス空間を形成する固定子外周部ガス風洞を備え、該固定子外周部ガス風洞に補助ガス冷却器を設けたことを特徴とする請求項１記載の回転電機。 A stator outer peripheral gas wind tunnel surrounding the stator outer peripheral portion and forming an outer peripheral gas space in the stator outer peripheral portion is provided, and an auxiliary gas cooler is provided in the stator outer peripheral gas wind tunnel. 1. The rotating electrical machine according to 1. 上記遠心送風機のガス風洞は、冷却ガスが上記固定子の周方向に、少なくとも２方向に送出する複数の冷却ガス送出口を備え、該複数の冷却ガス送出口にそれぞれ上記反転風洞を介して上記主ガス冷却器を接続し、該主冷却ガス冷却器から送出される冷却ガスは上記端部ガス空間に少なくとも２方向から流入するように接続されていることを特徴とする請求項１〜請求項２のいずれかに記載の回転電機。 Gas Tunnel of the centrifugal blower, in the circumferential direction of the cooling gas the stator comprises a plurality of cooling gas delivery port for delivering at least two directions, via respective said inverting wind tunnel to the cooling gas outlet of said plurality of said connect the main gas cooler, claims 1, characterized in that the cooling gas delivered from the main cooling gas cooler are connected so as to flow from at least two directions in the end gas space The rotating electrical machine according to any one of 2 .
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JP5690884B2 (en) * 2013-07-22 2015-03-25 三菱電機株式会社 Rotating electric machine
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