JP2020145899A - Rotary electric machine - Google Patents

Rotary electric machine Download PDF

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JP2020145899A
JP2020145899A JP2019042851A JP2019042851A JP2020145899A JP 2020145899 A JP2020145899 A JP 2020145899A JP 2019042851 A JP2019042851 A JP 2019042851A JP 2019042851 A JP2019042851 A JP 2019042851A JP 2020145899 A JP2020145899 A JP 2020145899A
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end side
frame
air
space
stator
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JP7283139B2 (en
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浩太 川西
Kota Kawanishi
浩太 川西
元紹 大村
Motoaki Omura
元紹 大村
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Meidensha Corp
Meidensha Electric Manufacturing Co Ltd
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Meidensha Electric Manufacturing Co Ltd
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Abstract

To provide a rotary electric machine in which air can be efficiently flowed into a gap even if a rotor is rotated at a high speed.SOLUTION: A motor 10 is provided that comprises a one-end side air flowing device 21 having: one-end side communication ports 16A and 16B which are formed near one end of a frame 11 and communicate one-end side space S1 formed inside near the one end of the frame 11 with an outside; and the other-end side communication ports 18A and 18b which are formed near the other end of the frame 11, and communicate the other-end side space S2 formed inside near the other end of the frame 11 with the outside, and cause air 1 to flow into the one-end side space S1. The motor 10 further comprises the other-end side air flowing device 22 which is connected to other-end side communication ports 18A and 18B and causes the air 1 to flow into the other-end side space S2. The device 21, 22 cause the air 1 to flow into the space S1, S2 in such a way that an air pressure P1 in the one- end side space S1 is set to be 1.5 times or more an air pressure P2 in the other end side space S2.SELECTED DRAWING: Figure 1

Description

本発明は、モータやジェネレータ等の回転電機に関する。 The present invention relates to a rotary electric machine such as a motor or a generator.

高出力化や高速回転化等を要求される大型のモータやジェネレータ等の回転電機においては、高出力化に対応して、ステータの内部やコイルエンド等の巻線部分に厚手の高圧絶縁紙が使用されると共に、高速回転化に対応して、ロータの磁石が回転軸にリングで覆われるように固定されることから、ステータの巻線部分やロータの磁石部分が放熱しにくくなり、温度上昇しやすくなっている。 In rotating electric machines such as large motors and generators that require high output and high speed rotation, thick high-pressure insulating paper is used inside the stator and winding parts such as coil ends in response to high output. As it is used, the rotor magnet is fixed to the rotating shaft so that it is covered with a ring in response to high-speed rotation, so it becomes difficult for the winding part of the stator and the magnet part of the rotor to dissipate heat, and the temperature rises. It's easier to do.

そのため、ステータとロータとの間のギャップやコイルエンドに空気を流通させることにより、ステータやロータを冷却するようにしている。 Therefore, the stator and rotor are cooled by allowing air to flow through the gap between the stator and the rotor and the coil end.

特開２０１１−２１１８１６号公報Japanese Unexamined Patent Publication No. 2011-21816 特開２００８−３０１６４６号公報Japanese Unexamined Patent Publication No. 2008-301646

しかしながら、上述したような回転電機において、ロータが高速度（１００００ｒｐｍ以上）で回転すると、ステータとロータとの間のギャップの気圧が高くなって、当該ギャップに空気が流通しにくくなってしまい、冷却性能の低下を招くおそれがあった。 However, in a rotary electric machine as described above, when the rotor rotates at a high speed (10000 rpm or more), the air pressure in the gap between the stator and the rotor becomes high, and it becomes difficult for air to flow through the gap, resulting in cooling. There was a risk of performance degradation.

このようなことから、本発明は、ロータを高速度で回転させても、ギャップに空気を効率よく流通させることができる回転電機を提供することを目的とする。 Therefore, an object of the present invention is to provide a rotary electric machine capable of efficiently circulating air in a gap even when the rotor is rotated at a high speed.

前述した課題を解決するための、本発明に係る回転電機は、円筒形をなすフレームと、前記フレームの端部を覆うように当該フレームの両端側にそれぞれ設けられたブラケットと、前記ブラケットに両端側をそれぞれ回転可能に支持されて前記フレームの内部を貫通する回転軸と、前記回転軸に取り付けられた円筒形をなすロータと、前記フレームの内周面に取り付けられて前記ロータとの間にギャップを有するように当該ロータを内側に位置させる円筒形をなすステータとを備えている回転電機において、前記フレームの一端寄りに形成されて当該フレームの一端寄りの内部の、前記ブラケットと前記回転軸及び前記ロータと前記ステータとで囲まれると共に前記ギャップへ連通する一端側空間と当該フレームの外部とを連通する一端側連通口と、前記フレームの他端寄りに形成されて当該フレームの他端寄りの内部の、前記ブラケットと前記回転軸及び前記ロータと前記ステータとで囲まれると共に前記ギャップへ連通する他端側空間と当該フレームの外部とを連通する他端側連通口とを有すると共に、前記一端側連通口へ接続されて前記フレームの内部の前記一端側空間に空気を流通させる一端側空気流通手段と、前記他端側連通口へ接続されて前記フレームの内部の前記他端側空間に空気を流通させる他端側空気流通手段とを備え、前記一端側空気流通手段及び前記他端側空気流通手段が、前記一端側空間内の気圧を前記他端側空間内の気圧よりも１．５倍以上となるように、当該一端側空間及び当該他端側空間に空気を流通させるものであることを特徴とする。 In order to solve the above-mentioned problems, the rotary electric machine according to the present invention includes a cylindrical frame, brackets provided on both ends of the frame so as to cover the ends of the frame, and both ends of the bracket. Between a rotating shaft that is rotatably supported on each side and penetrates the inside of the frame, a cylindrical rotor attached to the rotating shaft, and the rotor attached to the inner peripheral surface of the frame. In a rotary electric machine provided with a cylindrical stator that positions the rotor inward so as to have a gap, the bracket and the rotating shaft are formed near one end of the frame and inside the frame. And one end side communication port which is surrounded by the rotor and the stator and communicates with the space on one end side and the outside of the frame, and is formed near the other end of the frame and near the other end of the frame. It has the other end side space which is surrounded by the bracket, the rotation shaft, the rotor and the stator, and communicates with the gap, and the other end side communication port which communicates with the outside of the frame. One end side air flow means connected to the one end side communication port to flow air to the one end side space inside the frame, and the other end side space connected to the other end side communication port to flow air to the other end side space inside the frame. The other end side air flow means for circulating air is provided, and the one end side air flow means and the other end side air flow means make the pressure in the one end side space higher than the pressure in the other end side space. It is characterized in that air is circulated in the one end side space and the other end side space so as to be five times or more.

また、本発明に係る回転電機は、上述した回転電機において、前記フレームの軸方向中程に形成されて当該フレームの外側と内側とを連通させる中程連通口と、前記中程連通口と前記ギャップとを連通するように前記ステータに形成された中程ダクトと、前記中程連通口と前記一端側空間とを連通するように前記ステータと前記フレームとの間に設けられた一端側ダクトと、前記中程連通口と前記他端側空間とを連通するように前記ステータと前記フレームとの間に設けられた他端側ダクトとを有していることを特徴とする。 Further, the rotary electric machine according to the present invention is the above-mentioned rotary electric machine, which is formed in the middle of the axial direction of the frame to communicate the outside and the inside of the frame, and the middle communication port and the middle communication port. A middle duct formed in the stator so as to communicate with the gap, and one end side duct provided between the stator and the frame so as to communicate the middle communication port and the one end side space. It is characterized by having the other end side duct provided between the stator and the frame so as to communicate the middle communication port and the other end side space.

また、本発明に係る回転電機は、上述した回転電機において、前記回転軸の一端側に負荷を連結されたモータであることを特徴とする。 Further, the rotary electric machine according to the present invention is the above-mentioned rotary electric machine, characterized in that it is a motor in which a load is connected to one end side of the rotary shaft.

本発明に係る回転電機においては、一端側空気流通手段及び他端側空気流通手段が、一端側空間内の気圧を他端側空間内の気圧よりも１．５倍以上となるように、一端側空間及び他端側空間に空気を流通させることから、ロータが高速度（１００００ｒｐｍ以上）で回転して、ギャップの気圧が高くなっていても、一端側空間内の空気が、他端側空間内へ移動するようにギャップ内を流通するので、ロータの外周面及びステータの内周面を軸方向一端側から他端側へ向かって流通する空気で冷却することができる。 In the rotary electric machine according to the present invention, one end of the one end side air flow means and the other end side air flow means so that the air pressure in the one end side space is 1.5 times or more the air pressure in the other end side space. Since air is circulated in the side space and the other end space, even if the rotor rotates at a high speed (10000 rpm or more) and the air pressure in the gap is high, the air in the one end side space remains in the other end side space. Since it circulates in the gap so as to move inward, the outer peripheral surface of the rotor and the inner peripheral surface of the stator can be cooled by the air flowing from one end side in the axial direction to the other end side.

本発明に係る回転電機をモータに適用した場合の主な実施形態の要部の概略構造図である。It is a schematic structural drawing of the main part of the main embodiment when the rotary electric machine which concerns on this invention is applied to a motor. 図１のモータの空気の流通方向の説明図である。It is explanatory drawing of the air flow direction of the motor of FIG. 高速回転時の空気の流通状態の解析結果を示す図であり、Ａが同容量の冷却ブロアで冷却した場合を示し、Ｂが異なる容量の冷却ブロアで冷却した場合を示す。It is a figure which shows the analysis result of the air flow state at the time of high-speed rotation, shows the case where A is cooled by the cooling blower of the same capacity, and shows the case where B is cooled by the cooling blower of a different capacity. ステータの内部の巻線及び磁石の温度上昇値の比較グラフである。It is a comparative graph of the temperature rise value of the winding and the magnet inside the stator.

本発明に係る回転電機の実施形態を図面に基づいて説明するが、本発明は図面に基づいて説明する以下の実施形態のみに限定されるものではない。 The embodiment of the rotary electric machine according to the present invention will be described with reference to the drawings, but the present invention is not limited to the following embodiments described based on the drawings.

〈主な実施形態〉
本発明に係る回転電機をモータに適用した場合の主な実施形態を図１，２に基づいて説明する。 <Main embodiment>
A main embodiment when the rotary electric machine according to the present invention is applied to a motor will be described with reference to FIGS. 1 and 2.

図１に示すように、内部中空の円筒形をなすフレーム１１の軸方向両端側には、対をなす環状のブラケット１２Ａ，１２Ｂが当該フレーム１１の端部を覆うように同軸上にそれぞれ取り付けられている。対をなす前記ブラケット１２Ａ，１２Ｂは、前記フレーム１１の内部を貫通するように当該フレーム１１の内部に同軸をなして配設された回転軸１３の端部をそれぞれ回転可能に支持している。 As shown in FIG. 1, paired annular brackets 12A and 12B are coaxially attached to both ends of the frame 11 having an internally hollow cylindrical shape in the axial direction so as to cover the ends of the frame 11. ing. The paired brackets 12A and 12B rotatably support the ends of the rotating shafts 13 coaxially arranged inside the frame 11 so as to penetrate the inside of the frame 11.

前記フレーム１１の内部の、前記回転軸１３の軸方向中程の外周面には、永久磁石１４ａが当該回転軸１３の周方向全長にわたって配設されると共に、円筒形のリング１４ｂが当該永久磁石１４ａを当該回転軸１３の外周面に固定するように嵌合しており、当該永久磁石１４ａ及び当該リング１４ｂ等により、ロータ１４が構成されている。 A permanent magnet 14a is arranged over the entire circumferential direction of the rotating shaft 13 on the outer peripheral surface of the rotating shaft 13 in the middle of the axial direction inside the frame 11, and a cylindrical ring 14b is provided on the permanent magnet. The rotor 14 is fitted so as to be fixed to the outer peripheral surface of the rotating shaft 13, and the rotor 14 is composed of the permanent magnet 14a, the ring 14b, and the like.

前記フレーム１１の内部の軸方向中程の内周面には、円筒形をなすステータ１５の外周面が当該フレーム１１と同軸をなすようにして固定されている。前記ステータ１５の内側には、前記ロータ１４が同軸をなして位置付けられており、当該ロータ１４の外周面と当該ステータ１５の内周面とは、その間に規定間隔のギャップＧを有するように対向している。 The outer peripheral surface of the cylindrical stator 15 is fixed to the inner peripheral surface of the inside of the frame 11 in the middle of the axial direction so as to be coaxial with the frame 11. The rotor 14 is coaxially positioned inside the stator 15, and the outer peripheral surface of the rotor 14 and the inner peripheral surface of the stator 15 face each other so as to have a gap G at a predetermined interval between them. are doing.

前記フレーム１１の軸方向一端寄り（図１中、左端寄り）の内部には、前記ステータ１５の軸方向一端側（図１中、左端側）のコイルエンド１９Ａを包囲するように前記ブラケット１２Ａと前記回転軸１３及び前記ロータ１４と当該ステータ１５とで囲まれた一端側空間Ｓ１が設けられており、当該一端側空間Ｓ１は、前記ギャップＧへ連通している。 Inside the frame 11 near one end in the axial direction (closer to the left end in FIG. 1), the bracket 12A and the bracket 12A surround the coil end 19A on the one end side in the axial direction (left end side in FIG. 1) of the stator 15. One end side space S1 surrounded by the rotating shaft 13, the rotor 14, and the stator 15 is provided, and the one end side space S1 communicates with the gap G.

前記フレーム１１の軸方向他端寄り（図１中、右端寄り）の内部には、前記ステータ１５の軸方向他端側（図１中、右端側）のコイルエンド１９Ｂを包囲するように前記ブラケット１２Ｂと前記回転軸１３及び前記ロータ１４と当該ステータ１５とで囲まれた他端側空間Ｓ２が設けられており、当該他端側空間Ｓ２は、前記ギャップＧへ連通している。 Inside the frame 11 near the other end in the axial direction (closer to the right end in FIG. 1), the bracket so as to surround the coil end 19B on the other end side in the axial direction (right end side in FIG. 1) of the stator 15. The other end side space S2 surrounded by the 12B, the rotating shaft 13, the rotor 14, and the stator 15 is provided, and the other end side space S2 communicates with the gap G.

前記フレーム１１の周面の軸方向一端寄り（図１中、左端寄り）には、当該フレーム１１の外部と前記一端側空間Ｓ１とを連通させる一端側連通口１６Ａ，１６Ｂが前記回転軸１３を挟んで対向するように対をなして形成されている。前記フレーム１１の周面の軸方向他端寄り（図１中、右端寄り）には、当該フレーム１１の外部と前記他端側空間Ｓ２とを連通させる他端側連通口１８Ａ，１８Ｂが前記回転軸１３を挟んで対向するように対をなして形成されている。 At one end of the peripheral surface of the frame 11 in the axial direction (closer to the left end in FIG. 1), one end side communication ports 16A and 16B that communicate the outside of the frame 11 with the one end side space S1 connect the rotating shaft 13. It is formed in pairs so as to sandwich and face each other. At the other end of the peripheral surface of the frame 11 in the axial direction (closer to the right end in FIG. 1), the other end side communication ports 18A and 18B that communicate the outside of the frame 11 with the other end side space S2 rotate. They are formed in pairs so as to face each other with the shaft 13 in between.

前記フレーム１１の前記一端側連通口１６Ａ，１６Ｂは、前記一端側空間Ｓ１内に空気を流通させる一端側空気流通手段であるブロア等の一端側空気流通装置２１へ連絡しており、当該一端側空気流通装置２１は、当該一端側空間Ｓ１内の気圧Ｐ１を調整するように、当該一端側空間Ｓ１内の空気の流通量（通風量）Ｂ１を調節することができるようになっている。 The one end side communication ports 16A and 16B of the frame 11 communicate with one end side air circulation device 21 such as a blower which is one end side air circulation means for circulating air in the one end side space S1, and the one end side. The air flow device 21 can adjust the air flow amount (ventilation amount) B1 in the one end side space S1 so as to adjust the air pressure P1 in the one end side space S1.

前記フレーム１１の前記他端側連通口１８Ａ，１８Ｂは、前記他端側空間Ｓ２内に空気を流通させる他端側空気流通手段であるブロア等の他端側空気流通装置２２に連絡しており、当該他端側空気流通装置２２は、当該他端側空間Ｓ２内の気圧Ｐ２を調整するように、当該他端側空間Ｓ２内の空気の流通量（通風量）Ｂ２を調節することができるようになっている。 The other end side communication ports 18A and 18B of the frame 11 communicate with the other end side air circulation device 22 such as a blower which is the other end side air flow means for circulating air in the other end side space S2. The other end side air flow device 22 can adjust the air flow amount (ventilation amount) B2 in the other end side space S2 so as to adjust the air pressure P2 in the other end side space S2. It has become like.

前記フレーム１１の周面の軸方向中程には、当該フレーム１１の外側と内側とを連通させる中程連通口１７Ａ，１７Ｂが前記ステータ１５及び前記ロータ１４並びに前記回転軸１３を挟んで対向するように対をなして形成されており、当該中程連通口１７Ａ，１７Ｂは、大気開放されている。 In the middle of the peripheral surface of the frame 11 in the axial direction, the middle communication ports 17A and 17B that communicate the outside and the inside of the frame 11 face each other with the stator 15, the rotor 14, and the rotating shaft 13 interposed therebetween. They are formed in pairs as described above, and the middle communication ports 17A and 17B are open to the atmosphere.

前記ステータ１５の軸方向中程には、前記中程連通口１７Ａ，１７Ｂと前記ギャップＧとを連通する中程ダクト１５ａが径方向へ沿って形成されている。前記フレーム１１と前記ステータ１５との間には、前記一端側空間Ｓ１と前記中程ダクト１５ａとを連通する一端側ダクト１５ｂ及び前記他端側空間Ｓ２と前記中程ダクト１５ａとを連通する他端側ダクト１５ｃが軸方向へ沿ってそれぞれ設けられており、当該ダクト１５ｂ，１５ｃは、周方向に沿って所定の間隔でそれぞれ複数設けられている。 In the middle of the stator 15 in the axial direction, a middle duct 15a that communicates the middle communication ports 17A and 17B with the gap G is formed along the radial direction. Between the frame 11 and the stator 15, one end side duct 15b that communicates the one end side space S1 and the middle duct 15a, and the other end side space S2 and the middle duct 15a communicate with each other. The end side ducts 15c are provided along the axial direction, and a plurality of the ducts 15b and 15c are provided at predetermined intervals along the circumferential direction.

このような本実施形態に係るモータ１０においては、前記ステータ１５のコイルに電気を流して前記ロータ１４を高速度（１００００ｒｐｍ以上）で回転させると、前記回転軸１３の一端側（図１，２中、左端側）に連結された負荷（図示省略）へ動力が伝達される。 In the motor 10 according to the present embodiment, when electricity is passed through the coil of the stator 15 to rotate the rotor 14 at a high speed (10000 rpm or more), one end side of the rotating shaft 13 (FIGS. 1 and 2). Power is transmitted to the load (not shown) connected to the middle and left end side).

これと併せて、前記一端側空間Ｓ１内の気圧Ｐ１が前記他端側空間Ｓ２内の気圧Ｐ２よりも１．５倍以上となるように（Ｐ１≧１．５Ｐ２）、言い換えると、前記他端側空間Ｓ２内の気圧Ｐ２が前記一端側空間Ｓ１内の気圧Ｐ１よりも２／３倍以下となるように（Ｐ２≦２／３Ｐ１）、前記空気流通装置２１，２２を作動させて通風量Ｂ１，Ｂ２を調節する。これにより、前記空間Ｓ１，Ｓ２内に空気が流通して、前記コイルエンド１９Ａ，１９Ｂが冷却される。 At the same time, the air pressure P1 in the one end side space S1 is 1.5 times or more the air pressure P2 in the other end side space S2 (P1 ≧ 1.5 P2), in other words, the other end. The air flow devices 21 and 22 are operated so that the air pressure P2 in the side space S2 is 2/3 times or less than the air pressure P1 in the one end side space S1 (P2 ≦ 2/3 P1), and the ventilation amount B1 , B2 is adjusted. As a result, air flows through the spaces S1 and S2, and the coil ends 19A and 19B are cooled.

これに伴って、図２に示すように、前記フレーム１１の外部の空気１が前記中程連通口１７Ａ，１７Ｂ内に引き込まれ、その大部分が、前記ダクト１５ｂ，１５ｃ内を流通して前記空間Ｓ１，Ｓ２内に流入すると共に、その残りが、前記ダクト１５ａ内を流通して前記ギャップＧ内へ流入する。これにより、前記ステータ１５は、最も温度の高い軸方向中央部分から両端側へ向かって外周面を流通する空気１で冷却されると共に、最も温度の高い軸方向中央部分で径方向外側から径方向内側へ向かって内部を流通する空気１で冷却される。 Along with this, as shown in FIG. 2, the air 1 outside the frame 11 is drawn into the middle communication ports 17A and 17B, and most of the air circulates in the ducts 15b and 15c. It flows into the spaces S1 and S2, and the rest flows through the duct 15a and flows into the gap G. As a result, the stator 15 is cooled by the air 1 flowing on the outer peripheral surfaces from the central portion in the axial direction having the highest temperature toward both ends, and the stator 15 is radially central from the outer radial direction in the central portion in the axial direction having the highest temperature. It is cooled by the air 1 flowing inside toward the inside.

さらに、前記一端側空間Ｓ１内の気圧Ｐ１が前記他端側空間Ｓ２内の気圧Ｐ２よりも大きい（１．５倍以上）、言い換えると、前記他端側空間Ｓ２内の気圧Ｐ２が前記一端側空間Ｓ１内の気圧Ｐ１よりも小さい（２／３倍以下）ので、当該一端側空間Ｓ１内の空気１が、当該他端側空間Ｓ２内へ移動するように前記ギャップＧ内を流通すると共に、前記中程ダクト１５ａ内を流通した空気１を引き込んで合流しながら当該他端側空間Ｓ２内に流入する。これにより、前記ロータ１４の外周面及び前記ステータ１５の内周面は、軸方向一端側（図１，２中、左端側）から他端側（図１，２中、右端側）へ向かって流通する空気１で冷却される。 Further, the air pressure P1 in the one end side space S1 is larger than the air pressure P2 in the other end side space S2 (1.5 times or more), in other words, the air pressure P2 in the other end side space S2 is the one end side. Since the air pressure in the space S1 is smaller than the air pressure P1 (2/3 times or less), the air 1 in the one end side space S1 circulates in the gap G so as to move into the other end side space S2. The air pressure 1 that has flowed through the middle duct 15a is drawn in and merges with the air pressure 1 that flows into the other end side space S2. As a result, the outer peripheral surface of the rotor 14 and the inner peripheral surface of the stator 15 are directed from one end side in the axial direction (left end side in FIGS. 1 and 2) to the other end side (right end side in FIGS. 1 and 2). It is cooled by the circulating air 1.

このため、本実施形態に係るモータ１０においては、高出力化への対応で前記ステータ１５の内部や前記コイルエンド１９Ａ，１９Ｂ等の巻線部分に厚手の高圧絶縁紙を使用したり、高速回転化への対応で前記永久磁石１４ａを前記リング１４ｂで覆うように前記ロータ１４を前記回転軸１３に固定しても、当該ステータ１５の内部及び上記コイルエンド１９Ａ，１９Ｂ等の巻線部分や、当該ロータ１４の上記永久磁石１４ａ部分を効果的に冷却して、温度上昇を大幅に抑制することができる。 Therefore, in the motor 10 according to the present embodiment, thick high-pressure insulating paper is used for the inside of the stator 15 and the winding portion of the coil ends 19A, 19B, etc. in order to increase the output, or high-speed rotation is performed. Even if the rotor 14 is fixed to the rotating shaft 13 so as to cover the permanent magnet 14a with the ring 14b in response to the change, the inside of the stator 15 and the winding portions of the coil ends 19A, 19B, etc. The permanent magnet 14a portion of the rotor 14 can be effectively cooled to significantly suppress the temperature rise.

したがって、本実施形態に係るモータ１０によれば、前記ロータ１４を高速度（１００００ｒｐｍ以上）で回転させても、前記ギャップＧに空気１を効率よく流通させることができる。 Therefore, according to the motor 10 according to the present embodiment, even if the rotor 14 is rotated at a high speed (10000 rpm or more), the air 1 can be efficiently circulated in the gap G.

なお、前記気圧Ｐ１が前記気圧Ｐ２の１．５倍よりも小さい（Ｐ１＜１．５Ｐ２）、言い換えると、前記気圧Ｐ２が前記気圧Ｐ１の２／３倍よりも大きいと（Ｐ２＞２／３Ｐ１）、前記ロータ１４を高速度（１００００ｒｐｍ以上）で回転させたときに、前記ギャップＧに空気１が流通しにくくなってしまい、冷却性能の向上を図ることが難しくなってしまう。 The atmospheric pressure P1 is smaller than 1.5 times the atmospheric pressure P2 (P1 <1.5P2), in other words, the atmospheric pressure P2 is larger than 2/3 times the atmospheric pressure P1 (P2> 2/3 P1). ), When the rotor 14 is rotated at a high speed (10000 rpm or more), the air 1 becomes difficult to flow through the gap G, and it becomes difficult to improve the cooling performance.

〈他の実施形態〉
また、前述した実施形態では、回転軸１３の、大きい気圧Ｐ１の前記空間Ｓ１側の端部側（一端側）に、負荷を連結した場合について説明したが、他の実施形態として、回転軸１３の、小さい気圧Ｐ２の前記空間Ｓ２側の端部側（他端側）に、負荷を連結した場合や、回転軸１３の両方の端部側（一端側及び他端側）に、負荷を連結した場合であっても、前述した実施形態の場合と同様な作用効果を得ることができる。 <Other Embodiments>
Further, in the above-described embodiment, the case where the load is connected to the end side (one end side) of the rotating shaft 13 on the space S1 side of the large atmospheric pressure P1 has been described, but as another embodiment, the rotating shaft 13 has been described. When the load is connected to the end side (the other end side) of the space S2 side of the small atmospheric pressure P2, or to both end sides (one end side and the other end side) of the rotating shaft 13. Even in the case of the above, the same action and effect as in the case of the above-described embodiment can be obtained.

また、前述した実施形態では、高出力化や高速回転化等を要求される大型のモータ１０に適用した場合について説明したが、本発明はこれに限らず、他の電動機や発電機等の回転電機であれば、前述した実施形態の場合と同様にして適用することができる。 Further, in the above-described embodiment, the case where the motor 10 is applied to a large motor 10 that is required to have high output and high speed rotation is described, but the present invention is not limited to this, and the rotation of other electric motors, generators, etc. If it is an electric motor, it can be applied in the same manner as in the case of the above-described embodiment.

高速回転時において、負荷直結側と負荷反直結側とに同じ容量の冷却ブロアを接続した場合の解析結果を図３Ａに示し、負荷直結側と負荷反直結側とに違う容量（負荷直結側と負荷反直結側とで容量が１：２となる）の冷却ブロアを接続した場合の流体解析結果を図３Ｂに示す。○及び矢印の中の数字は、吸気流入量、ギャップ流入量それぞれに対する通風量の比率を表す。 Figure 3A shows the analysis results when cooling blowers of the same capacity are connected to the load direct connection side and the load anti-direct connection side during high-speed rotation, and the different capacities (the load direct connection side and the load non-direct connection side) are shown in FIG. FIG. 3B shows the results of fluid analysis when a cooling blower (with a capacity of 1: 2 on the side directly connected to the load) is connected. The numbers in the circles and arrows represent the ratio of the ventilation amount to the intake inflow amount and the gap inflow amount.

図３Ａでは、負荷直結側と負荷反直結側との圧力差が小さいため、ギャップに流入する空気の量が少ないことが確認できる。図３Ｂでは、負荷直結側と負荷反直結側とで圧力差がついたことにより、負荷直結側と負荷反直結側とに同じ容量の冷却ブロアを接続した場合と比べて、ギャップに流入する空気の量を６倍に増加できることがわかる。 In FIG. 3A, it can be confirmed that the amount of air flowing into the gap is small because the pressure difference between the load direct connection side and the load non-direct connection side is small. In FIG. 3B, due to the pressure difference between the load direct connection side and the load non-direct connection side, the air flowing into the gap is compared with the case where the same capacity cooling blower is connected to the load direct connection side and the load non-direct connection side. It can be seen that the amount of can be increased 6 times.

また、ステータの内部の巻線及び磁石の最大温度上昇の比較グラフを図４に示す。図４のグラフは、同容量通風時の巻線及び磁石の各最大温度上昇をもとに正規化したものである。圧力差通風により、巻線では７％ほど、磁石では２７％ほどの温度上昇の低減が認められ、ステータ及びロータの冷却に効果があることがわかる。 Further, FIG. 4 shows a comparative graph of the maximum temperature rise of the winding and the magnet inside the stator. The graph of FIG. 4 is normalized based on the maximum temperature rises of the winding and the magnet at the time of ventilation of the same capacity. It can be seen that the pressure difference ventilation reduces the temperature rise by about 7% for the winding and about 27% for the magnet, which is effective in cooling the stator and rotor.

本発明に係る回転電機は、ロータを高速度で回転させても、ギャップに空気を効率よく流通させることができ、冷却性能を大きく向上させて、高出力化や高速回転化を更に図ることができるので、産業上、極めて有益に利用することができる。 The rotary electric machine according to the present invention can efficiently circulate air through the gap even when the rotor is rotated at a high speed, greatly improves the cooling performance, and further aims at high output and high speed rotation. Since it can be used, it can be used extremely beneficially industrially.

１ 空気
１０ モータ
１１ フレーム
１２Ａ，１２Ｂ ブラケット
１３ 回転軸
１４ ロータ
１４ａ 永久磁石
１４ｂ リング
１５ ステータ
１５ａ 中程ダクト
１５ｂ 一端側ダクト
１５ｃ 他端側ダクト
１６Ａ，１６Ｂ 一端側連通口
１７Ａ，１７Ｂ 中程連通口
１８Ａ，１８Ｂ 他端側連通口
１９Ａ，１９Ｂ コイルエンド
２１ 一端側空気流通装置
２２ 他端側空気流通装置
Ｇ ギャップ
Ｓ１ 一端側空間
Ｓ２ 他端側空間 1 Air 10 Motor 11 Frame 12A, 12B Bracket 13 Rotating shaft 14 Rotor 14a Permanent magnet 14b Ring 15 Stator 15a Middle duct 15b One end duct 15c One end duct 16A, 16B One end side communication port 17A, 17B Middle communication port 18A , 18B End side communication port 19A, 19B Coil end 21 One end side air flow device 22 End side air flow device G gap S1 One end side space S2 One end side space

Claims (3)

円筒形をなすフレームと、
前記フレームの端部を覆うように当該フレームの両端側にそれぞれ設けられたブラケットと、
前記ブラケットに両端側をそれぞれ回転可能に支持されて前記フレームの内部を貫通する回転軸と、
前記回転軸に取り付けられた円筒形をなすロータと、
前記フレームの内周面に取り付けられて前記ロータとの間にギャップを有するように当該ロータを内側に位置させる円筒形をなすステータと
を備えている回転電機において、
前記フレームの一端寄りに形成されて当該フレームの一端寄りの内部の、前記ブラケットと前記回転軸及び前記ロータと前記ステータとで囲まれると共に前記ギャップへ連通する一端側空間と当該フレームの外部とを連通する一端側連通口と、
前記フレームの他端寄りに形成されて当該フレームの他端寄りの内部の、前記ブラケットと前記回転軸及び前記ロータと前記ステータとで囲まれると共に前記ギャップへ連通する他端側空間と当該フレームの外部とを連通する他端側連通口と
を有すると共に、
前記一端側連通口へ接続されて前記フレームの内部の前記一端側空間に空気を流通させる一端側空気流通手段と、
前記他端側連通口へ接続されて前記フレームの内部の前記他端側空間に空気を流通させる他端側空気流通手段と
を備え、
前記一端側空気流通手段及び前記他端側空気流通手段が、前記一端側空間内の気圧を前記他端側空間内の気圧よりも１．５倍以上となるように、当該一端側空間及び当該他端側空間に空気を流通させるものである
ことを特徴とする回転電機。 With a cylindrical frame,
Brackets provided on both ends of the frame so as to cover the ends of the frame,
A rotating shaft that is rotatably supported on both ends by the bracket and penetrates the inside of the frame.
A cylindrical rotor attached to the rotating shaft and
In a rotary electric machine provided with a cylindrical stator attached to the inner peripheral surface of the frame and positioning the rotor inward so as to have a gap with the rotor.
An end-side space formed near one end of the frame and surrounded by the bracket, the rotating shaft, the rotor, and the stator and communicating with the gap, and the outside of the frame are provided inside the frame. One end side communication port to communicate and
The space on the other end of the frame, which is formed near the other end of the frame and is surrounded by the bracket, the rotating shaft, the rotor, and the stator, and communicates with the gap, and the frame. It has a communication port on the other end side that communicates with the outside, and also has a communication port on the other end.
One-sided air circulation means connected to the one-sided communication port and allowing air to flow through the one-sided space inside the frame.
The other end side air flow means which is connected to the other end side communication port and allows air to flow through the other end side space inside the frame is provided.
The one end side space and the one end side space so that the one end side air flow means and the other end side air flow means make the air pressure in the one end side space 1.5 times or more the air pressure in the other end side space. A rotary electric machine characterized in that air is circulated in the space on the other end side. 請求項１に記載の回転電機において、
前記フレームの軸方向中程に形成されて当該フレームの外側と内側とを連通させる中程連通口と、
前記中程連通口と前記ギャップとを連通するように前記ステータに形成された中程ダクトと、
前記中程連通口と前記一端側空間とを連通するように前記ステータと前記フレームとの間に設けられた一端側ダクトと、
前記中程連通口と前記他端側空間とを連通するように前記ステータと前記フレームとの間に設けられた他端側ダクトと
を有していることを特徴とする回転電機。 In the rotary electric machine according to claim 1,
A middle communication port formed in the middle of the frame in the axial direction to communicate the outside and the inside of the frame,
A middle duct formed in the stator so as to communicate the middle communication port and the gap,
One end side duct provided between the stator and the frame so as to communicate the middle communication port and the one end side space,
A rotary electric machine having a duct on the other end side provided between the stator and the frame so as to communicate the middle communication port and the space on the other end side. 請求項１又は請求項２に記載の回転電機において、
前記回転軸の一端側に負荷を連結されたモータである
ことを特徴とする回転電機。 In the rotary electric machine according to claim 1 or 2.
A rotary electric machine characterized in that it is a motor in which a load is connected to one end side of the rotary shaft.
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JP7151821B1 (en) 2021-04-30 2022-10-12 株式会社明電舎 rotating machine
JP7266790B1 (en) 2021-11-19 2023-05-01 株式会社明電舎 Rotating electric machine

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JP7151821B1 (en) 2021-04-30 2022-10-12 株式会社明電舎 rotating machine
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