JP6854700B2 - Rotor of rotary electric machine, rotary electric machine and compressor - Google Patents

Rotor of rotary electric machine, rotary electric machine and compressor Download PDF

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JP6854700B2
JP6854700B2 JP2017100616A JP2017100616A JP6854700B2 JP 6854700 B2 JP6854700 B2 JP 6854700B2 JP 2017100616 A JP2017100616 A JP 2017100616A JP 2017100616 A JP2017100616 A JP 2017100616A JP 6854700 B2 JP6854700 B2 JP 6854700B2
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iron core
flow path
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rotor
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JP2018196302A (en
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伊藤　慎一
慎一 伊藤
一弘 庄野
一弘 庄野
裕貴 田村
裕貴 田村
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Mitsubishi Electric Corp
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Description

この発明は、回転電機の回転子、回転電機および圧縮機に関し、特に、永久磁石を効率的に冷却できる回転電機の回転子、回転電機および圧縮機に関するものである。 The present invention relates to a rotor, a rotary electric machine and a compressor of a rotary electric machine, and more particularly to a rotor, a rotary electric machine and a compressor of a rotary electric machine capable of efficiently cooling a permanent magnet.

永久磁石を埋込んだ回転子を用いる回転電機では、稼働時に生じる発熱の影響により、回転子の永久磁石の温度が上昇し、磁束の低下によりトルクが減少したり、材料の熱劣化による故障等の不具合を起こしたりする。そこで、従来から、回転子を冷却する技術が提案されている。 In a rotating electric machine that uses a rotor with embedded permanent magnets, the temperature of the permanent magnets of the rotor rises due to the effect of heat generated during operation, torque decreases due to a decrease in magnetic flux, and failures due to thermal deterioration of materials, etc. Causes problems. Therefore, conventionally, a technique for cooling the rotor has been proposed.

特許文献１の回転電機の回転子は、ロータコアと、ロータコアに埋め込まれた永久磁石とを備え、回転軸により支持される回転電機のロータであって、ロータコアには回転軸内に形成された軸内冷媒路から供給された冷媒を当該ロータコアの外周端まで導いて、ステータとの間のギャップに放出する１以上のコア内冷媒路が形成されており、コア内冷媒路は、永久磁石より内周側位置において、軸方向に延びる中央冷媒路と、前記ロータコアの軸方向両端近傍に設けられ、前記軸内冷媒路と前記中央冷媒路とを連通する一対の内周側冷媒路と、前記中央冷媒路の軸方向略中央から径方向外側に延びて前記ギャップに連通する外周側冷媒路と、を備え、前記中央冷媒路の径方向外側端部は、前記軸方向略中央に近づくにつれて径方向外側に進むような勾配を有している。 The rotor of the rotary electric machine of Patent Document 1 is a rotor of a rotary electric machine having a rotor core and a permanent magnet embedded in the rotor core and supported by a rotary shaft, and the rotor core has a shaft formed in the rotary shaft. One or more in-core refrigerant passages are formed in which the refrigerant supplied from the inner refrigerant passage is guided to the outer peripheral end of the rotor core and discharged into the gap between the rotor core and the rotor core, and the in-core refrigerant passage is inside the permanent magnet. At the circumferential position, a central refrigerant passage extending in the axial direction, a pair of inner peripheral refrigerant passages provided near both ends in the axial direction of the rotor core and communicating the in-shaft refrigerant passage and the central refrigerant passage, and the center. The outer peripheral side refrigerant passage extending radially outward from the axially substantially center of the refrigerant passage and communicating with the gap is provided, and the radially outer end of the central refrigerant passage is radially outward as it approaches the axially substantially center. It has a slope that goes outward.

特開２０１７−００５９６１号公報（３〜４頁、段落００１０、図２、３）JP-A-2017-005961 (pages 3-4, paragraph 0010, FIGS. 2, 3)

特許文献１のようなＩＰＭ型（永久磁石埋め込み型）回転電機の回転子の構成によれば、中央冷媒路から外周側冷媒路への曲げ角度が緩くなり、当該部分においては圧力損失を低減できる。ただし、回転軸内部に冷媒流路を形成する必要があるため、回転軸の外径が太くなり、回転電機が大型化するという課題があった。また、冷媒の流路方向が、径方向（シャフト→コア）、軸方向（コア内部）、径方向（コア内部）と変化するため、全体としては圧力損失が大きくなるという課題があった。 According to the configuration of the rotor of the IPM type (permanent magnet embedded type) rotary electric machine as in Patent Document 1, the bending angle from the central refrigerant path to the outer peripheral side refrigerant path becomes loose, and the pressure loss can be reduced in the portion. .. However, since it is necessary to form a refrigerant flow path inside the rotating shaft, there is a problem that the outer diameter of the rotating shaft becomes large and the rotating electric machine becomes large. Further, since the flow path direction of the refrigerant changes in the radial direction (shaft → core), the axial direction (inside the core), and the radial direction (inside the core), there is a problem that the pressure loss becomes large as a whole.

この発明は、上記のような課題を解決するためになされたものであり、永久磁石を効率よく冷却し、小型、高効率、高出力、かつ、組立性に優れる回転電機の回転子、回転電機および圧縮機を得ることを目的としている。 The present invention has been made to solve the above-mentioned problems, and is a rotor and a rotating electric machine of a rotating electric machine which efficiently cools a permanent magnet, has a small size, high efficiency, high output, and is excellent in assembling property. And aims to get a compressor.

この発明に係る回転電機の回転子は、
複数の第一鉄心片を積層して形成する積層鉄心と、前記積層鉄心に軸方向に挿入した複数の永久磁石と、前記積層鉄心に挿入したシャフトとを有する回転電機の回転子であって、
前記積層鉄心は、
中央に設けた前記シャフトを挿入するシャフト挿入孔と、
周方向に間隔を空けて、軸方向に貫通するように形成された磁石保持孔と、
隣り合う２つの前記磁石保持孔の間の径方向内側にそれぞれ設けられ、軸方向に貫通し、外部からの冷媒が前記積層鉄心の内部を流れ、外部に排出される流路の一部となる第三流路と、
前記流路の一部であり、前記第三流路から径方向に連通する第二流路と、
前記流路の一部であり、前記磁石保持孔と径方向に連通し、前記積層鉄心の径方向外側に開口する第一流路とを備え、
前記磁石保持孔は、
前記永久磁石を挿入する磁石挿入部と、
前記永久磁石の周方向側面に沿って形成され、前記第二流路から径方向に連通する、前記流路の一部である空隙部とからなり、
前記第一鉄心片は、
前記第一鉄心片が複数枚積層されて前記第三流路となる流路孔と、
前記第一鉄心片が複数枚積層されて前記第二流路となる第二溝と、
前記第一鉄心片が複数枚積層されて前記磁石保持孔となる長孔と、
前記第一鉄心片が複数枚積層されて前記第一流路となる第一溝とを備え、
少なくとも、前記第二溝の内側の端部の軸方向の一面に、面取りされた第二勾配部を備え、
軸方向中央部から軸方向の一方に積層された複数の前記第一鉄心片と、
軸方向の他方に積層された複数の前記第一鉄心片とは、前記第二勾配部が形成された前記第二溝の軸方向の一面が軸方向中央に向いて積層されているものである。
また、この発明に係る回転電機の回転子は、
複数の第一鉄心片を積層して形成する積層鉄心と、前記積層鉄心に軸方向に挿入した複数の永久磁石と、前記積層鉄心に挿入したシャフトとを有する回転電機の回転子であって、
前記積層鉄心は、
中央に設けた前記シャフトを挿入するシャフト挿入孔と、
周方向に間隔を空けて、軸方向に貫通するように形成された磁石保持孔と、
隣り合う２つの前記磁石保持孔の間の径方向内側にそれぞれ設けられ、軸方向に貫通し、外部からの冷媒が前記積層鉄心の内部を流れ、外部に排出される流路の一部となる第三流路と、
前記流路の一部であり、前記第三流路から径方向に連通する第二流路と、
前記流路の一部であり、前記磁石保持孔と径方向に連通し、前記積層鉄心の径方向外側に開口する第一流路とを備え、
前記磁石保持孔は、
前記永久磁石を挿入する磁石挿入部と、
前記永久磁石の周方向側面に沿って形成され、前記第二流路から径方向に連通する、前記流路の一部である空隙部とからなり、
前記第一鉄心片は、
前記第一鉄心片が複数枚積層されて前記第三流路となる流路孔と、
前記第一鉄心片が複数枚積層されて前記第二流路となる第二溝と、
前記第一鉄心片が複数枚積層されて前記磁石保持孔となる長孔と、
前記第一鉄心片が複数枚積層されて前記第一流路となる第一溝とを備え、
少なくとも、前記第二溝の内側の端部の軸方向の一面に、面取りされた第二勾配部を備え、
２つの前記第一流路を合わせた周方向の幅と、前記第二流路の周方向の幅と、前記第三流路の周方向の幅とは同じである。
また、この発明に係る回転電機の回転子は、
複数の第一鉄心片を積層して形成する積層鉄心と、前記積層鉄心に軸方向に挿入した複数の永久磁石と、前記積層鉄心に挿入したシャフトとを有する回転電機の回転子であって、
前記積層鉄心は、
中央に設けた前記シャフトを挿入するシャフト挿入孔と、
周方向に間隔を空けて、軸方向に貫通するように形成された磁石保持孔と、
隣り合う２つの前記磁石保持孔の間の径方向内側にそれぞれ設けられ、軸方向に貫通し、外部からの冷媒が前記積層鉄心の内部を流れ、外部に排出される流路の一部となる第三流路と、
前記流路の一部であり、前記第三流路から径方向に連通する第二流路と、
前記流路の一部であり、前記磁石保持孔と径方向に連通し、前記積層鉄心の径方向外側に開口する第一流路とを備え、
前記磁石保持孔は、
前記永久磁石を挿入する磁石挿入部と、
前記永久磁石の周方向側面に沿って形成され、前記第二流路から径方向に連通する、前記流路の一部である空隙部とからなり、
前記第一鉄心片は、
前記第一鉄心片が複数枚積層されて前記第三流路となる流路孔と、
前記第一鉄心片が複数枚積層されて前記第二流路となる第二溝と、
前記第一鉄心片が複数枚積層されて前記磁石保持孔となる長孔と、
前記第一鉄心片が複数枚積層されて前記第一流路となる第一溝とを備え、
少なくとも、前記第二溝の内側の端部の軸方向の一面に、面取りされた第二勾配部を備え、
前記第三流路の径方向の幅は、周方向の幅よりも大きい。
また、この発明に係る回転電機の回転子は、
複数の第一鉄心片を積層して形成する積層鉄心と、前記積層鉄心に軸方向に挿入した複数の永久磁石と、前記積層鉄心に挿入したシャフトとを有する回転電機の回転子であって、
前記積層鉄心は、
中央に設けた前記シャフトを挿入するシャフト挿入孔と、
周方向に間隔を空けて、軸方向に貫通するように形成された磁石保持孔と、
隣り合う２つの前記磁石保持孔の間の径方向内側にそれぞれ設けられ、軸方向に貫通し、外部からの冷媒が前記積層鉄心の内部を流れ、外部に排出される流路の一部となる第三流路と、
前記流路の一部であり、前記第三流路から径方向に連通する第二流路と、
前記流路の一部であり、前記磁石保持孔と径方向に連通し、前記積層鉄心の径方向外側に開口する第一流路とを備え、
前記磁石保持孔は、
前記永久磁石を挿入する磁石挿入部と、
前記永久磁石の周方向側面に沿って形成され、前記第二流路から径方向に連通する、前記流路の一部である空隙部とからなり、
前記第一鉄心片は、
前記第一鉄心片が複数枚積層されて前記第三流路となる流路孔と、
前記第一鉄心片が複数枚積層されて前記第二流路となる第二溝と、
前記第一鉄心片が複数枚積層されて前記磁石保持孔となる長孔と、
前記第一鉄心片が複数枚積層されて前記第一流路となる第一溝とを備え、
少なくとも、前記第二溝の内側の端部の軸方向の一面に、面取りされた第二勾配部を備え、
軸方向中央部から軸方向の一方に積層された複数の前記第一鉄心片と、
軸方向の他方に積層された複数の前記第一鉄心片とは、表裏が逆に積層されているものである。 The rotor of the rotary electric machine according to the present invention is
A rotor of a rotary electric machine having a laminated iron core formed by laminating a plurality of first core pieces, a plurality of permanent magnets inserted into the laminated iron core in the axial direction, and a shaft inserted into the laminated iron core.
The laminated iron core
A shaft insertion hole provided in the center for inserting the shaft,
Magnet holding holes formed so as to penetrate in the axial direction at intervals in the circumferential direction,
It is provided on the inside in the radial direction between the two adjacent magnet holding holes, penetrates in the axial direction, and the refrigerant from the outside flows inside the laminated iron core and becomes a part of the flow path discharged to the outside. The third flow path and
A second flow path that is a part of the flow path and communicates radially from the third flow path,
It is provided with a first flow path that is a part of the flow path, communicates with the magnet holding hole in the radial direction, and opens radially outward of the laminated iron core.
The magnet holding hole is
A magnet insertion part for inserting the permanent magnet and
It is composed of a gap portion that is a part of the flow path, which is formed along the circumferential side surface of the permanent magnet and communicates radially from the second flow path.
The first iron core piece is
A flow path hole in which a plurality of the first iron core pieces are laminated to form the third flow path,
A second groove in which a plurality of the first iron core pieces are laminated to form the second flow path,
A long hole in which a plurality of the first iron core pieces are laminated to serve as the magnet holding hole, and
A first groove in which a plurality of the first iron core pieces are laminated to form the first flow path is provided.
At least one surface in the axial direction of the inner end of the second groove is provided with a chamfered second gradient portion.
A plurality of the first iron core pieces laminated from the central portion in the axial direction to one in the axial direction,
The plurality of the first core pieces stacked in the axial direction of the other, one side of the axial direction of the said second slope portion is formed a second groove is in shall be stacked facing axial center ..
Further, the rotor of the rotary electric machine according to the present invention is
A rotor of a rotary electric machine having a laminated iron core formed by laminating a plurality of first core pieces, a plurality of permanent magnets inserted into the laminated iron core in the axial direction, and a shaft inserted into the laminated iron core.
The laminated iron core
A shaft insertion hole provided in the center for inserting the shaft,
Magnet holding holes formed so as to penetrate in the axial direction at intervals in the circumferential direction,
It is provided on the inside in the radial direction between the two adjacent magnet holding holes, penetrates in the axial direction, and the refrigerant from the outside flows inside the laminated iron core and becomes a part of the flow path discharged to the outside. The third flow path and
A second flow path that is a part of the flow path and communicates radially from the third flow path,
It is provided with a first flow path that is a part of the flow path, communicates with the magnet holding hole in the radial direction, and opens radially outward of the laminated iron core.
The magnet holding hole is
A magnet insertion part for inserting the permanent magnet and
It is composed of a gap portion that is a part of the flow path, which is formed along the circumferential side surface of the permanent magnet and communicates radially from the second flow path.
The first iron core piece is
A flow path hole in which a plurality of the first iron core pieces are laminated to form the third flow path,
A second groove in which a plurality of the first iron core pieces are laminated to form the second flow path,
An elongated hole in which a plurality of the first iron core pieces are laminated to serve as the magnet holding hole,
A first groove in which a plurality of the first iron core pieces are laminated to form the first flow path is provided.
At least one surface in the axial direction of the inner end of the second groove is provided with a chamfered second gradient portion.
The width of the two first flow paths in the circumferential direction, the width of the second flow path in the circumferential direction, and the width of the third flow path in the circumferential direction are the same.
Further, the rotor of the rotary electric machine according to the present invention is
A rotor of a rotary electric machine having a laminated iron core formed by laminating a plurality of first core pieces, a plurality of permanent magnets inserted into the laminated iron core in the axial direction, and a shaft inserted into the laminated iron core.
The laminated iron core
A shaft insertion hole provided in the center for inserting the shaft,
Magnet holding holes formed so as to penetrate in the axial direction at intervals in the circumferential direction,
It is provided on the inside in the radial direction between the two adjacent magnet holding holes, penetrates in the axial direction, and the refrigerant from the outside flows inside the laminated iron core and becomes a part of the flow path discharged to the outside. The third flow path and
A second flow path that is a part of the flow path and communicates radially from the third flow path,
It is provided with a first flow path that is a part of the flow path, communicates with the magnet holding hole in the radial direction, and opens radially outward of the laminated iron core.
The magnet holding hole is
A magnet insertion part for inserting the permanent magnet and
It is composed of a gap portion that is a part of the flow path, which is formed along the circumferential side surface of the permanent magnet and communicates radially from the second flow path.
The first iron core piece is
A flow path hole in which a plurality of the first iron core pieces are laminated to form the third flow path,
A second groove in which a plurality of the first iron core pieces are laminated to form the second flow path,
A long hole in which a plurality of the first iron core pieces are laminated to serve as the magnet holding hole, and
A first groove in which a plurality of the first iron core pieces are laminated to form the first flow path is provided.
At least one surface in the axial direction of the inner end of the second groove is provided with a chamfered second gradient portion.
The radial width of the third flow path is larger than the circumferential width.
Further, the rotor of the rotary electric machine according to the present invention is
A rotor of a rotary electric machine having a laminated iron core formed by laminating a plurality of first core pieces, a plurality of permanent magnets inserted into the laminated iron core in the axial direction, and a shaft inserted into the laminated iron core.
The laminated iron core
A shaft insertion hole provided in the center for inserting the shaft,
Magnet holding holes formed so as to penetrate in the axial direction at intervals in the circumferential direction,
It is provided on the inside in the radial direction between the two adjacent magnet holding holes, penetrates in the axial direction, and the refrigerant from the outside flows inside the laminated iron core and becomes a part of the flow path discharged to the outside. The third flow path and
A second flow path that is a part of the flow path and communicates radially from the third flow path,
It is provided with a first flow path that is a part of the flow path, communicates with the magnet holding hole in the radial direction, and opens radially outward of the laminated iron core.
The magnet holding hole is
A magnet insertion part for inserting the permanent magnet and
It is composed of a gap portion that is a part of the flow path, which is formed along the circumferential side surface of the permanent magnet and communicates radially from the second flow path.
The first iron core piece is
A flow path hole in which a plurality of the first iron core pieces are laminated to form the third flow path,
A second groove in which a plurality of the first iron core pieces are laminated to form the second flow path,
A long hole in which a plurality of the first iron core pieces are laminated to serve as the magnet holding hole, and
A first groove in which a plurality of the first iron core pieces are laminated to form the first flow path is provided.
At least one surface in the axial direction of the inner end of the second groove is provided with a chamfered second gradient portion.
A plurality of the first iron core pieces laminated from the central portion in the axial direction to one in the axial direction,
The plurality of first iron core pieces laminated on the other side in the axial direction are those in which the front and back surfaces are laminated in reverse.

この発明に係る回転電機は、
固定子と、前記固定子の内周面に、所定の間隔を設けて外周面を対向させるように配設された前記回転子とを備えるものである。 The rotary electric machine according to the present invention
It is provided with a stator and the rotor arranged on the inner peripheral surface of the stator so as to face the outer peripheral surfaces at a predetermined interval.

この発明に係る圧縮機は、
前記回転電機と、前記回転電機のシャフトに接続された圧縮機構とを備えるものである。 The compressor according to the present invention
It includes the rotary electric machine and a compression mechanism connected to the shaft of the rotary electric machine.

本発明に係る回転電機の回転子、回転電機および圧縮機によれば、外部から積層鉄心内に流入した冷媒が、軸方向に流れる第三流路から径方向に分岐する第二流路の入り口に第二勾配部を設けることにより、冷媒の流れをスムーズに方向転換できるので、冷媒の圧力損失を抑制し、永久磁石の冷却効果に優れた回転電機の回転子、回転電機、圧縮機を提供できる。 According to the rotor, the rotary electric machine, and the compressor of the rotary electric machine according to the present invention, the inlet of the second flow path in which the refrigerant flowing into the laminated iron core from the outside branches in the radial direction from the third flow path flowing in the axial direction. By providing a second gradient portion in the refrigerant, the flow of the refrigerant can be smoothly changed, so that the pressure loss of the refrigerant is suppressed, and the rotor, rotary electric machine, and compressor of the rotary electric machine having an excellent cooling effect of the permanent magnet are provided. it can.

本発明の実施の形態１に係る回転電機の構成を示す断面図である。It is sectional drawing which shows the structure of the rotary electric machine which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る回転子の積層鉄心の斜視図である。It is a perspective view of the laminated iron core of the rotor which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る回転子の断面模式図である。It is sectional drawing of the rotor which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る積層鉄心を構成する鉄心片の正面図である。It is a front view of the iron core piece constituting the laminated iron core which concerns on Embodiment 1 of this invention. 図４、Ａ部の要部斜視図である。FIG. 4 is a perspective view of a main part of part A. 図４を裏側から見た図である。FIG. 4 is a view from the back side. 図６、Ｃ部の要部斜視図である。FIG. 6 is a perspective view of a main part of part C. 図４のＢ−Ｂ線における断面図である。It is sectional drawing in BB line of FIG. 本発明の実施の形態１に係る磁石孔に、永久磁石を挿入した際の永久磁石の占有範囲を示す要部断面図である。It is a cross-sectional view of a main part which shows the occupied range of a permanent magnet when a permanent magnet is inserted into the magnet hole which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る積層鉄心を構成する他の鉄心片の正面図である。It is a front view of another iron core piece constituting the laminated iron core which concerns on Embodiment 1 of this invention. 図１０、Ｄ部の要部斜視図である。10 is a perspective view of a main part of part D in FIG. 本発明の実施の形態１に係る他の回転子の断面模式図である。It is sectional drawing of another rotor which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る他の回転子の断面模式図である。It is sectional drawing of another rotor which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る鉄心片の製造工程を示す図である。It is a figure which shows the manufacturing process of the iron core piece which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る積層間を溶接した積層鉄心の斜視図である。FIG. 5 is a perspective view of a laminated iron core welded between layers according to the first embodiment of the present invention. 本発明の実施の形態１に係る他の積層鉄心の斜視図である。It is a perspective view of another laminated iron core which concerns on Embodiment 1 of this invention. 本発明の実施の形態２に係る回転子の断面模式図である。It is sectional drawing of the rotor which concerns on Embodiment 2 of this invention. 本発明の実施の形態２に係る積層鉄心を構成する鉄心片の正面図である。It is a front view of the iron core piece constituting the laminated iron core which concerns on Embodiment 2 of this invention. 図１８、Ｅ部の要部斜視図である。FIG. 18 is a perspective view of a main part of part E. 図１８を裏側から見た図である。FIG. 18 is a view of FIG. 18 seen from the back side. 図１８のＦ−Ｆ線における断面図である。FIG. 5 is a cross-sectional view taken along the line FF of FIG. 本発明の実施の形態２に係る他の回転子の断面模式図である。It is sectional drawing of another rotor which concerns on Embodiment 2 of this invention. 本発明の実施の形態３に係る回転子の断面模式図である。It is sectional drawing of the rotor which concerns on Embodiment 3 of this invention. 本発明の実施の形態４に係る回転子の断面模式図である。It is sectional drawing of the rotor which concerns on Embodiment 4 of this invention. 本発明の実施の形態４に係る端板の正面図である。It is a front view of the end plate which concerns on Embodiment 4 of this invention. 本発明の実施の形態４に係る回転子の要部上面図である。It is a top view of the main part of the rotor which concerns on Embodiment 4 of this invention. 本発明の実施の形態４に係る圧縮機の断面図である。It is sectional drawing of the compressor which concerns on Embodiment 4 of this invention.

実施の形態１．
以下、本発明の実施の形態１に係る回転電機の回転子および回転電機を図を用いて説明する。
本明細書で、特に断り無く「軸方向」、「周方向」、「径方向」、「内周側」、「外周側」、「内周面」、「外周面」、「内側」、「外側」というときは、それぞれ、回転子の「軸方向」、「周方向」、「径方向」、「内周側」、「外周側」、「内周面」、「外周面」、「内側」、「外側」をいうものとする。また、特に断り無く「上」、「下」と言うときは、基準となる場所において、軸方向に垂直な面を想定し、その面を境界として回転子の中心点が含まれる側を「下」、その反対を「上」とする。また、高さの高低を比較する場合は、回転子の中心からの距離が長い方を「高い」とする。 Embodiment 1.
Hereinafter, the rotor of the rotary electric machine and the rotary electric machine according to the first embodiment of the present invention will be described with reference to the drawings.
In the present specification, "axial direction", "circumferential direction", "diameter direction", "inner peripheral side", "outer peripheral side", "inner peripheral surface", "outer peripheral surface", "inside", "inside", without particular notice. When we say "outside", we mean "axial", "circumferential", "diameter", "inner circumference", "outer circumference", "inner circumference", "outer circumference", and "inside" of the rotor, respectively. , "Outside". In addition, when we say "upper" or "lower" without particular notice, we assume a plane perpendicular to the axial direction at the reference location, and the side containing the center point of the rotor is "lower" with that plane as the boundary. , And the opposite is "above". When comparing the heights, the one with the longer distance from the center of the rotor is regarded as "higher".

図１は、本発明の実施の形態１に係る回転電機１００の構成を示す断面図である。
回転電機１００は、固定子１と、この固定子１の内周面に、所定の間隔を設けて外周面を対向させるように配設された回転子２とからなる。固定子１は、ヨーク部と、ヨーク部の内周面から径方向内側に突出する複数のティース部とからなる固定子鉄心１１および、ティース部に巻回された固定子コイル１２とを備える。 FIG. 1 is a cross-sectional view showing the configuration of the rotary electric machine 100 according to the first embodiment of the present invention.
The rotary electric machine 100 includes a stator 1 and a rotor 2 arranged on the inner peripheral surface of the stator 1 so as to face the outer peripheral surfaces at a predetermined interval. The stator 1 includes a stator portion 11, a stator core 11 including a plurality of teeth portions protruding inward in the radial direction from the inner peripheral surface of the yoke portion, and a stator coil 12 wound around the teeth portion.

図２は、回転子２の積層鉄心５０の斜視図である。
図３は、回転子２を、その中心軸を通る２つの平面で切断した断面模式図である。
図４は、積層鉄心５０を構成する鉄心片２０ａ（第一鉄心片）の正面図である。
図５は、図４、Ａ部の要部斜視図である。
図６は、図４を裏側から見た図である。
図７は、図６、Ｃ部の要部斜視図である。
図８は、図４のＢ−Ｂ線における断面図である。 FIG. 2 is a perspective view of the laminated iron core 50 of the rotor 2.
FIG. 3 is a schematic cross-sectional view of the rotor 2 cut by two planes passing through its central axis.
FIG. 4 is a front view of the iron core piece 20a (first iron core piece) constituting the laminated iron core 50.
FIG. 5 is a perspective view of a main part of FIG. 4 and A.
FIG. 6 is a view of FIG. 4 as viewed from the back side.
FIG. 7 is a perspective view of a main part of FIG. 6 and C.
FIG. 8 is a cross-sectional view taken along the line BB of FIG.

図１〜８に示すように、積層鉄心５０の鉄心片２０ａには、積層されることにより永久磁石４が軸方向に挿入される、後述する磁石保持孔５１となる部分である６つの長孔２１と、冷媒が軸方向に流れる第三流路５２となる部分である６つの流路孔２２と、シャフト３が挿入されるシャフト挿入孔５３となる部分であるシャフト孔２３と、径方向かつ外側に開口し、長孔２１に連通する１２個の第一溝２４と、長孔２１及び流路孔２２に対して共に径方向に連通する６つの第二溝２５とを有する。第一溝２４及び第二溝２５とは、鉄心片２０ａの同じ面に形成されている。 As shown in FIGS. 1 to 8, the iron core piece 20a of the laminated iron core 50 has six elongated holes which are portions serving as magnet holding holes 51, which will be described later, in which the permanent magnet 4 is inserted in the axial direction by being laminated. 21, six flow path holes 22 which are portions of the third flow path 52 through which the refrigerant flows in the axial direction, and shaft holes 23 which are portions of the shaft insertion holes 53 into which the shaft 3 is inserted, in the radial direction and It has 12 first grooves 24 that are open to the outside and communicate with the elongated holes 21, and six second grooves 25 that communicate with the elongated holes 21 and the flow path holes 22 in the radial direction. The first groove 24 and the second groove 25 are formed on the same surface of the iron core piece 20a.

また、第一溝２４の内側端部の軸方向の一面には、面取りされた第一勾配部２４Ｍが設けられ、第二溝２５の内側端部にも面取りされた第二勾配部２５Ｍが設けられている。長孔２１は、鉄心片２０ａの外周面に近い位置に、周方向に均等に設けられている。隣り合う長孔２１間を周方向に仕切る部分を境界部２６とする。 Further, a chamfered first gradient portion 24M is provided on one surface of the inner end portion of the first groove 24 in the axial direction, and a chamfered second gradient portion 25M is also provided on the inner end portion of the second groove 25. Has been done. The elongated holes 21 are evenly provided in the circumferential direction at positions close to the outer peripheral surface of the iron core piece 20a. The portion that partitions the adjacent elongated holes 21 in the circumferential direction is defined as the boundary portion 26.

図９は、長孔２１に、永久磁石４を挿入した際の永久磁石４の占有範囲を示す要部断面図である。
図９に示すように、長孔２１に挿入された永久磁石４が占有する範囲が、鉄心片磁石挿入部２１ｇである。鉄心片磁石挿入部２１ｇの両端部と境界部２６との間には隙間が残り、この部分を鉄心片空隙部２１Ｓとする。鉄心片空隙部２１Ｓは、境界部２６に沿って、第一溝２４の縁まで続いている。鉄心片空隙部２１Ｓに繋がって、周方向に延びる隙間は、磁気遮断部２７である。磁気遮断部２７は、この部分を磁束が通らないようにするために設けている。 FIG. 9 is a cross-sectional view of a main part showing the occupied range of the permanent magnet 4 when the permanent magnet 4 is inserted into the elongated hole 21.
As shown in FIG. 9, the range occupied by the permanent magnet 4 inserted in the elongated hole 21 is the iron core single magnet insertion portion 21g. A gap remains between both ends of the iron core piece magnet insertion portion 21g and the boundary portion 26, and this portion is referred to as an iron core piece gap portion 21S. The iron core piece gap 21S continues along the boundary 26 to the edge of the first groove 24. The gap extending in the circumferential direction connected to the iron core piece gap 21S is the magnetic blocking portion 27. The magnetic blocking portion 27 is provided to prevent magnetic flux from passing through this portion.

図５に示すように、２つの第一溝２４が、１つの境界部２６を周方向に挟んでおり、流路孔２２は、境界部２６の径方向内側に１つずつ設けられている。すなわち、周方向に並んだ２つの第一流路５４が、それぞれ異なる空隙部５１Ｓを介して、１つの第二流路５５に連通する。また、この流路孔２２の周方向の幅と第二溝２５の周方向の幅と、境界部２６及びこれを挟む２つの第一溝２４との周方向の幅は、等しい。よって、２つの第一溝２４、２つの鉄心片空隙部２１Ｓ、１つの第二溝２５、流路孔２２は、径方向に真っ直ぐに繋がる。 As shown in FIG. 5, two first grooves 24 sandwich one boundary portion 26 in the circumferential direction, and one flow path hole 22 is provided inside the boundary portion 26 in the radial direction. That is, the two first flow paths 54 arranged in the circumferential direction communicate with one second flow path 55 via different gaps 51S. Further, the circumferential width of the flow path hole 22 and the circumferential width of the second groove 25 are equal to the circumferential width of the boundary portion 26 and the two first grooves 24 sandwiching the boundary portion 26. Therefore, the two first grooves 24, the two iron core piece gaps 21S, the one second groove 25, and the flow path hole 22 are connected straight in the radial direction.

第二溝２５の第二勾配部２５Ｍは、流路孔２２と第二溝２５との境界に形成されている。なお、同様の勾配部を第二溝２５と鉄心片空隙部２１Ｓ（長孔２１）との境界にも形成してもよい。また、第一溝２４の第一勾配部２４Ｍは、鉄心片空隙部２１Ｓと第一溝２４との境界に形成されている。なお、同様の勾配部を第一溝２４の外周の縁部に形成してもよい。 The second gradient portion 25M of the second groove 25 is formed at the boundary between the flow path hole 22 and the second groove 25. A similar gradient portion may be formed at the boundary between the second groove 25 and the iron core piece gap portion 21S (long hole 21). Further, the first gradient portion 24M of the first groove 24 is formed at the boundary between the iron core piece gap portion 21S and the first groove 24. A similar gradient portion may be formed on the outer peripheral edge portion of the first groove 24.

なお、図４〜９に示した鉄心片２０ａでは、第二勾配部２５Ｍ及び第一勾配部２４Ｍを、第二溝２５と第一溝２４とを形成した面と同一面（図５で示した軸方向の一面）に形成しているが、反対面（図７で示した他面）に形成してもよい。これについては、後述する積層鉄心５０の構成と併せて説明する。 In the iron core pieces 20a shown in FIGS. 4 to 9, the second gradient portion 25M and the first gradient portion 24M are flush with the surface on which the second groove 25 and the first groove 24 are formed (shown in FIG. 5). Although it is formed on one surface in the axial direction, it may be formed on the opposite surface (the other surface shown in FIG. 7). This will be described together with the configuration of the laminated iron core 50 described later.

長孔２１は、より外周側に設置することが好ましいが、極端に外周側に設けると、第一溝２４の径方向の幅が小さくなり、第一溝２４の強度が低下する。そこで、長孔２１は、回転子２を回転電機１００に用いた場合に加わる最大負荷に耐えられる範囲で、極力外周側に設置する。 The elongated hole 21 is preferably installed on the outer peripheral side, but if it is provided on the outer peripheral side extremely, the width of the first groove 24 in the radial direction becomes smaller, and the strength of the first groove 24 decreases. Therefore, the elongated hole 21 is installed on the outer peripheral side as much as possible within a range that can withstand the maximum load applied when the rotor 2 is used in the rotary electric machine 100.

流路孔２２は、鉄心片空隙部２１Ｓに近いほど好ましいが、鉄心片空隙部２１Ｓに近づけすぎると、第二溝２５の強度が低下する。そこで、流路孔２２は、回転子２を回転電機１００に用いた場合に加わる最大負荷に耐えられる範囲で、鉄心片空隙部２１Ｓに近づけて設置する。 The flow path hole 22 is preferably closer to the iron core piece gap 21S, but if it is too close to the iron core piece gap 21S, the strength of the second groove 25 decreases. Therefore, the flow path hole 22 is installed close to the iron core piece gap 21S within a range that can withstand the maximum load applied when the rotor 2 is used in the rotary electric machine 100.

図１０は、積層鉄心５０を構成する鉄心片２０ｂ（第二鉄心片）の正面図である。
図１１は、図１０、Ｄ部の要部斜視図である。
鉄心片２０ａと鉄心片２０ｂとの違いは、鉄心片２０ｂには、第一溝２４と第二溝２５の双方が形成されていない点である。その他の構成は、鉄心片２０ａと同じである。 FIG. 10 is a front view of the iron core piece 20b (second iron core piece) constituting the laminated iron core 50.
FIG. 11 is a perspective view of a main part of FIG. 10 and D.
The difference between the iron core piece 20a and the iron core piece 20b is that neither the first groove 24 nor the second groove 25 is formed in the iron core piece 20b. Other configurations are the same as those of the iron core piece 20a.

次に、積層鉄心５０と回転子２の構成について図２、３を用いて説明する。
図３に示す回転子２は、積層鉄心５０と、鉄心片２０ａの長孔２１が積層させて形成された、軸方向に貫通する磁石保持孔５１の磁石挿入部５１ｇに挿入される永久磁石４と、積層鉄心５０の軸方向両端面と接して設けられた端板２９と、積層鉄心５０の中央に設けられたシャフト挿入孔５３および端板２９の中央に設けられたシャフト挿入孔２９ｓに挿入して、積層鉄心５０および端板２９を固定しているシャフト３とを備えている。長孔２１の鉄心片磁石挿入部２１ｇが積層された部分が、磁石保持孔５１の磁石挿入部５１ｇであり、各磁石挿入部５１ｇに挿入されている永久磁石４は、１つの極を形成している。 Next, the configurations of the laminated iron core 50 and the rotor 2 will be described with reference to FIGS. 2 and 3.
The rotor 2 shown in FIG. 3 is a permanent magnet 4 inserted into a magnet insertion portion 51g of a magnet holding hole 51 penetrating in the axial direction, which is formed by laminating a laminated iron core 50 and an elongated hole 21 of an iron core piece 20a. And, it is inserted into the end plate 29 provided in contact with both end faces in the axial direction of the laminated iron core 50, the shaft insertion hole 53 provided in the center of the laminated iron core 50, and the shaft insertion hole 29s provided in the center of the end plate 29. The laminated iron core 50 and the shaft 3 fixing the end plate 29 are provided. The portion where the iron core single magnet insertion portion 21g of the elongated hole 21 is laminated is the magnet insertion portion 51g of the magnet holding hole 51, and the permanent magnet 4 inserted in each magnet insertion portion 51g forms one pole. ing.

図２、３に示すように、積層鉄心５０は、軸方向の両端側に鉄心片２０ｂを４枚ずつ積層しており、軸方向中央部には、鉄心片２０ａを１２枚積層している。また、１２枚の鉄心片２０ａの内、紙面上側の６枚と紙面下側の６枚とは、表裏を反転させている。鉄心片２０ａを積層した部分では、鉄心片２０ａの第一溝２４と第二溝２５とを形成した面（図４、５で示した面）と、第一溝２４と第二溝２５とを形成していない面（図６、７で示した面）とが重なることにより、鉄心片２０ａの積層間に２つの第一流路５４と、１つの第二流路５５とが形成される。 As shown in FIGS. 2 and 3, the laminated iron core 50 has four iron core pieces 20b laminated on both ends in the axial direction, and twelve iron core pieces 20a laminated on the central portion in the axial direction. Further, of the 12 iron core pieces 20a, 6 pieces on the upper side of the paper surface and 6 pieces on the lower side of the paper surface are reversed on the front and back sides. In the portion where the iron core pieces 20a are laminated, the surface (the surface shown in FIGS. 4 and 5) forming the first groove 24 and the second groove 25 of the iron core piece 20a and the first groove 24 and the second groove 25 are formed. By overlapping the non-formed surfaces (surfaces shown in FIGS. 6 and 7), two first flow paths 54 and one second flow path 55 are formed between the layers of the iron core pieces 20a.

また、鉄心片２０ａと２０ｂとを積層することにより、長孔２１が軸方向に重なった磁石保持孔５１と、流路孔２２が軸方向に重なった第三流路５２とが形成されている。磁石保持孔５１と第三流路５２とは、回転子の積層鉄心５０を軸方向に貫通している。鉄心片空隙部２１Ｓが軸方向に積層された部分が、空隙部５１Ｓである。同様に、磁気遮断部２７も軸方向に連なって軸方向に延びる磁気遮断路５７を形成している。そして端板２９には、第三流路５２に対応する位置に、冷媒を吸入する第一冷媒流入口２９ｉｎを設けている。 Further, by laminating the iron core pieces 20a and 20b, a magnet holding hole 51 in which the elongated holes 21 overlap in the axial direction and a third flow path 52 in which the flow path holes 22 overlap in the axial direction are formed. .. The magnet holding hole 51 and the third flow path 52 penetrate the laminated iron core 50 of the rotor in the axial direction. The portion in which the iron core piece gap portion 21S is laminated in the axial direction is the gap portion 51S. Similarly, the magnetic blocking section 27 also forms a magnetic blocking path 57 that is connected in the axial direction and extends in the axial direction. The end plate 29 is provided with a first refrigerant inflow port 29in for sucking the refrigerant at a position corresponding to the third flow path 52.

次に、図３を用いて、本実施の形態１の回転子２における永久磁石４を冷却する機構について説明する。
第三流路５２と第二流路５５とは径方向に連通し、第二流路５５と空隙部５１Ｓとも径方向に連通する。空隙部５１Ｓは、第一流路５４とも径方向に連通するので、積層鉄心５０の鉄心片２０ａが積層された部分では、これら全ての流路及び空隙部５１Ｓは、第三流路から積層鉄心５０の外部まで、径方向に繋がっている。 Next, the mechanism for cooling the permanent magnet 4 in the rotor 2 of the first embodiment will be described with reference to FIG.
The third flow path 52 and the second flow path 55 communicate with each other in the radial direction, and the second flow path 55 and the gap 51S also communicate with each other in the radial direction. Since the gap portion 51S also communicates with the first flow path 54 in the radial direction, in the portion where the iron core pieces 20a of the laminated iron core 50 are laminated, all these flow paths and the gap portion 51S are connected to the laminated iron core 50 from the third flow path. It is connected in the radial direction to the outside of.

回転子２が回転すると、遠心力により、空隙部５１Ｓ内の冷媒が、第一流路５４を通って回転子２の外部に放出される。すると、空隙部５１Ｓの圧力が低下するので、第二流路５５を通って、第三流路５２から空隙部５１Ｓへ冷媒が流入する。すると同様に、第三流路５２の圧力が低下するので、端板２９の第一冷媒流入口２９ｉｎから、第三流路５２内へ、外部から冷媒が取り入れられる。 When the rotor 2 rotates, the refrigerant in the gap 51S is discharged to the outside of the rotor 2 through the first flow path 54 due to centrifugal force. Then, since the pressure in the gap 51S decreases, the refrigerant flows from the third flow path 52 into the gap 51S through the second flow path 55. Then, similarly, since the pressure of the third flow path 52 decreases, the refrigerant is taken in from the outside into the third flow path 52 from the first refrigerant inflow port 29in of the end plate 29.

すなわち、図３の破線矢印で示すように、外部の冷媒は、まず、第一冷媒流入口２９ｉｎを通過して積層鉄心５０の第三流路５２へ流れ込む。次に、第三流路５２から、第二流路５５、空隙部５１Ｓ、第一流路５４と順に通過して、回転子２の外部に放出される。そして、積層鉄心５０の外周側に対向して配置された固定子鉄心１１も冷却される。 That is, as shown by the broken line arrow in FIG. 3, the external refrigerant first passes through the first refrigerant inflow port 29in and flows into the third flow path 52 of the laminated iron core 50. Next, the third flow path 52 passes through the second flow path 55, the gap 51S, and the first flow path 54 in this order, and is discharged to the outside of the rotor 2. Then, the stator core 11 arranged to face the outer peripheral side of the laminated iron core 50 is also cooled.

さらに、冷媒が固定子鉄心１１と積層鉄心５０の隙間を通って、固定子コイル１２に到達しこれを冷却するため、固定子１の冷却効果も優れている。 Further, since the refrigerant reaches the stator coil 12 through the gap between the stator core 11 and the laminated iron core 50 and cools the stator coil 12, the cooling effect of the stator 1 is also excellent.

冷媒は、空隙部５１Ｓを通過する際に、永久磁石４の周方向側面と接触しながら流れるので、永久磁石４を直接冷却する。さらに、第二溝２５に第二勾配部２５Ｍを設けることで、冷媒が、第三流路５２から第二流路５５に流入する際に、冷媒を軸方向から径方向に緩やかに曲げることができるため、流路の圧力損失を低減させることができる。 When the refrigerant passes through the gap 51S, it flows while contacting the circumferential side surface of the permanent magnet 4, so that the permanent magnet 4 is directly cooled. Further, by providing the second gradient portion 25M in the second groove 25, when the refrigerant flows from the third flow path 52 into the second flow path 55, the refrigerant can be gently bent in the radial direction from the axial direction. Therefore, the pressure loss in the flow path can be reduced.

また、同様に第一溝２４に第一勾配部２４Ｍを設けることで、冷媒が第一流路５４を通って外部に排出される際に、急激に圧縮されることを抑制できるため、流路の圧力損失を低減させることができる。以上により、冷媒により、効率的に永久磁石４を冷却することが可能となる。 Similarly, by providing the first gradient portion 24M in the first groove 24, it is possible to prevent the refrigerant from being rapidly compressed when it is discharged to the outside through the first flow path 54. The pressure loss can be reduced. As described above, the permanent magnet 4 can be efficiently cooled by the refrigerant.

なお、図４に示す通り、鉄心片２０ａ、２０ｂに設けた、第三流路５２を構成する流路孔２２の径方向の寸法ａと周方向の寸法ｂとは、以下の関係を満たすものとする。
ａ＞ｂ As shown in FIG. 4, the radial dimension a and the circumferential dimension b of the flow path hole 22 constituting the third flow path 52 provided in the iron core pieces 20a and 20b satisfy the following relationship. And.
a> b

積層鉄心５０の中を流れる冷媒は、回転子２の回転による遠心力により積層鉄心５０内を流れる。遠心力は、径方向に生じる。よって第三流路５２から径方向にスムーズに冷媒を流すには、２つの第一流路５４の周方向の幅と、第二流路５５の周方向の幅と、第三流路の周方向の幅が同じであることが好ましい。よって、第三流路の断面積を増やすには、径方向の寸法を大きくする方がより効率的に永久磁石４を冷却することが可能となる。各流路の周方向の幅を揃えることにより、流路中の障害物を減らし、より効率的に永久磁石４を冷却することが可能となる。 The refrigerant flowing in the laminated iron core 50 flows in the laminated iron core 50 due to the centrifugal force generated by the rotation of the rotor 2. Centrifugal force is generated in the radial direction. Therefore, in order for the refrigerant to flow smoothly in the radial direction from the third flow path 52, the width of the two first flow paths 54 in the circumferential direction, the width of the second flow path 55 in the circumferential direction, and the circumferential direction of the third flow path It is preferable that the widths of are the same. Therefore, in order to increase the cross-sectional area of the third flow path, it is possible to cool the permanent magnet 4 more efficiently by increasing the radial dimension. By aligning the widths in the circumferential direction of each flow path, obstacles in the flow path can be reduced and the permanent magnet 4 can be cooled more efficiently.

図３に示すように、回転子２は、冷媒を吸入する第一冷媒流入口２９ｉｎを積層鉄心５０の軸方向両端面に設けている。これにより冷媒の流れる方向は軸方向の２方向となるため、冷媒の流れる方向と第二勾配部２５Ｍの向きを合わせる必要がある。よって、上述のように、各鉄心片２０ａは、積層鉄心５０の軸方向中央を境に、鉄心片２０ａの表裏を反転させて積層している。すなわち図３では、全ての鉄心片２０ａを、第一溝２４と第二溝２５とが形成された面を積層鉄心５０の軸方向中央に向けた状態で積層している。 As shown in FIG. 3, the rotor 2 is provided with first refrigerant inflow ports 29 inches for sucking the refrigerant on both end faces in the axial direction of the laminated iron core 50. As a result, the flow directions of the refrigerant are two directions in the axial direction, so it is necessary to match the flow direction of the refrigerant with the direction of the second gradient portion 25M. Therefore, as described above, the iron core pieces 20a are laminated by inverting the front and back sides of the iron core pieces 20a with the axial center of the laminated iron core 50 as a boundary. That is, in FIG. 3, all the iron core pieces 20a are laminated in a state where the surfaces on which the first groove 24 and the second groove 25 are formed are directed toward the center in the axial direction of the laminated iron core 50.

図１２、１３は、本実施の形態１に係る他の回転子の断面模式図であり、積層鉄心５０の他のバリエーションを示す断面模式図である。
図１２に示す積層鉄心５０Ｂは、鉄心片２０ａに替えて鉄心片２０Ｂａを積層している。
鉄心片２０ａと鉄心片２０Ｂａとの違いは、第一勾配部２４ＢＭ、第二勾配部２５ＢＭの形成面が、各溝部を設けた面と反対面となっている点である。すなわち、鉄心片２０Ｂａでは、図７に示す面側に第一勾配部２４ＢＭと第二勾配部２５ＢＭとを有する。各鉄心片２０Ｂａは、第一溝２４と第二溝２５とが形成された面を積層鉄心５０の端板２９側に向けた状態で積層されている。 12 and 13 are schematic cross-sectional views of another rotor according to the first embodiment, and are schematic cross-sectional views showing other variations of the laminated iron core 50.
In the laminated iron core 50B shown in FIG. 12, the iron core piece 20Ba is laminated instead of the iron core piece 20a.
The difference between the iron core piece 20a and the iron core piece 20Ba is that the forming surface of the first gradient portion 24BM and the second gradient portion 25BM is opposite to the surface on which each groove portion is provided. That is, the iron core piece 20Ba has a first gradient portion 24BM and a second gradient portion 25BM on the surface side shown in FIG. 7. Each iron core piece 20Ba is laminated in a state where the surface on which the first groove 24 and the second groove 25 are formed faces the end plate 29 side of the laminated iron core 50.

図１３に示す積層鉄心５０Ｃは、鉄心片２０ａに替えて鉄心片２０Ｃａを積層している。鉄心片２０ａと鉄心片２０Ｃａとの違いは、第一勾配部２４ＣＭ、第二勾配部２５ＣＭの形成面が、各溝部を設けた部分の両面となっている点である。この場合、各鉄心片２０Ｃａを、全て同一向きに積層しても低損失の流路を形成することができる。 In the laminated iron core 50C shown in FIG. 13, the iron core piece 20Ca is laminated instead of the iron core piece 20a. The difference between the iron core piece 20a and the iron core piece 20Ca is that the forming surfaces of the first gradient portion 24CM and the second gradient portion 25CM are both sides of the portion provided with each groove portion. In this case, even if all the iron core pieces 20Ca are laminated in the same direction, a low-loss flow path can be formed.

また、以上の説明では、第二溝２５と鉄心片空隙部２１Ｓとの境界部と、第一溝２４と積層鉄心５０の外周との境界部には勾配部を形成していないが、これらの場所に勾配部を形成してもよい。 Further, in the above description, a gradient portion is not formed at the boundary portion between the second groove 25 and the iron core piece gap 21S and the boundary portion between the first groove 24 and the outer periphery of the laminated iron core 50. A slope may be formed in place.

次に、回転子２の製造方法について説明する。
図１４（ａ）は、鉄心片２０ｂの製造工程を示す図である。
図１４（ｂ）は、鉄心片２０ｂを鉄心片２０ａに加工する製造工程を示す図である。
図１４（ａ）に示すように、鉄心片２０ｂは、電磁鋼板Ｋをパンチで打ち抜いて製造する。まず、鉄心片２０ｂを先に製造する。所定の数の鉄心片２０ｂから、更にプレス加工して鉄心片２０ａを得る。 Next, a method of manufacturing the rotor 2 will be described.
FIG. 14A is a diagram showing a manufacturing process of the iron core piece 20b.
FIG. 14B is a diagram showing a manufacturing process for processing the iron core piece 20b into the iron core piece 20a.
As shown in FIG. 14A, the iron core piece 20b is manufactured by punching an electromagnetic steel plate K with a punch. First, the iron core piece 20b is manufactured first. From a predetermined number of iron core pieces 20b, further press working is performed to obtain iron core pieces 20a.

まず、図１４（ａ）に示すように、電磁鋼板Ｋから鉄心片２０ｂの外周部と、シャフト孔２３と、長孔２１と、流路孔２２とを同時に打ち抜いて、鉄心片２０ｂを製造する。鉄心片２０ｂを打ち抜くには、打ち抜く各部分を凹形状に成形した下型Ｄ２０ｂと、打ち抜く各部分を凸形状に成形した上型Ｕ２０ｂとの間に電磁鋼板Ｋを挟んでプレス加工する。このようにして、まず、積層鉄心５０の製造に必要な鉄心片２０ａ及び鉄心片２０ｂの総数である２０枚分の鉄心片２０ｂを製造する。 First, as shown in FIG. 14A, the outer peripheral portion of the iron core piece 20b, the shaft hole 23, the elongated hole 21, and the flow path hole 22 are simultaneously punched from the electromagnetic steel plate K to manufacture the iron core piece 20b. .. To punch out the iron core piece 20b, an electromagnetic steel plate K is sandwiched between a lower die D20b in which each part to be punched is formed into a concave shape and an upper die U20b in which each part to be punched is formed into a convex shape, and press working is performed. In this way, first, 20 iron core pieces 20b, which is the total number of the iron core pieces 20a and the iron core pieces 20b required for manufacturing the laminated iron core 50, are manufactured.

次に、図１４（ｂ）に示すように、製造した鉄心片２０ｂの内の１２枚を更にプレス加工して鉄心片２０ａを製造する。
平板上の下型Ｄ２０ａの上に鉄心片２０ｂを載置し、第一溝２４、第二溝２５、第一勾配部２４Ｍ、第二勾配部２５Ｍに対応する部分を凸形状に成形した上型Ｕ２０ａを用いて鉄心片２０ｂの一方の面に、プレス加工により第一溝２４、第二溝２５、第一勾配部２４Ｍと第二勾配部２５Ｍを形成して鉄心片２０ａを得る。なお、第一勾配部２４Ｍ、第二勾配部２５Ｍは、必ずしも両方備える必要はなく、少なくとも第二勾配部２５Ｍを設ければよい。 Next, as shown in FIG. 14B, 12 of the manufactured iron core pieces 20b are further pressed to manufacture the iron core piece 20a.
An iron core piece 20b is placed on the lower mold D20a on a flat plate, and the portions corresponding to the first groove 24, the second groove 25, the first slope portion 24M, and the second slope portion 25M are formed into a convex shape. The iron core piece 20a is obtained by forming a first groove 24, a second groove 25, a first gradient portion 24M and a second gradient portion 25M on one surface of the iron core piece 20b using U20a. The first gradient portion 24M and the second gradient portion 25M do not necessarily have to be both provided, and at least the second gradient portion 25M may be provided.

次に、鉄心片２０ａにおける第一溝２４の厚さについて説明する。図８に示すように、鉄心片２０ａの溝無し部の板厚をＴ、第一溝２４、第二溝２５部分の板厚をＴｃとする。Ｔｃを薄くすると、各溝の断面積が増え、より多くの冷媒を流すことが可能になるが、反対に当該部分の強度が落ち、また加工が困難になる。したがって、Ｔｃの範囲を０．５Ｔ≦Ｔｃ≦０．７Ｔとする。 Next, the thickness of the first groove 24 in the iron core piece 20a will be described. As shown in FIG. 8, the plate thickness of the grooveless portion of the iron core piece 20a is T, and the plate thickness of the first groove 24 and the second groove 25 portion is Tc. When the Tc is made thin, the cross-sectional area of each groove is increased and more refrigerant can flow, but on the contrary, the strength of the portion is lowered and the processing becomes difficult. Therefore, the range of Tc is set to 0.5T ≦ Tc ≦ 0.7T.

鉄心片２０ａの変形例である上述の鉄心片２０Ｂａ、鉄心片２０Ｃａについても同様に鉄心片２０ｂから製造するが、第一溝、第二溝、及び各勾配部を形成する工程が異なる。 The above-mentioned iron core piece 20Ba and iron core piece 20Ca, which are modified examples of the iron core piece 20a, are also manufactured from the iron core piece 20b, but the steps of forming the first groove, the second groove, and each slope portion are different.

鉄心片２０ａに第一勾配部２４Ｍ、第二勾配部２５Ｍを設けることで、金型によりで電磁鋼板Ｋを打ち抜く際に、せん断面の切り口に生じる「ばり」を除去することができる。これにより、鉄心片２０ａ、２０ｂの積層時に、積層間への「ばり」の混入を抑制でき、回転子２およびこれを用いる回転電機１００の組立性、信頼性を向上できる。 By providing the iron core piece 20a with the first gradient portion 24M and the second gradient portion 25M, it is possible to remove "burrs" generated at the cut end of the sheared surface when the electromagnetic steel sheet K is punched out by a die. As a result, when the iron core pieces 20a and 20b are laminated, it is possible to suppress the mixing of "burrs" between the laminates, and it is possible to improve the assemblability and reliability of the rotor 2 and the rotary electric machine 100 using the rotor 2.

以上のようにして１２枚の鉄心片２０ａと、８枚の鉄心片２０ｂを製造後、まず、６枚の鉄心片２０ａを、同じ面が上になるように積層したものを２セット製造し、各セットの第一溝２４および第二溝２５が形成された面を合わせるように積層する。このような向きに１２枚の鉄心片２０ａを積層した後、その軸方向の両側に、それぞれ４枚の鉄心片２０ｂを積層する。 After manufacturing the 12 iron core pieces 20a and the 8 iron core pieces 20b as described above, first, two sets of 6 iron core pieces 20a laminated so that the same side faces up are manufactured. The surfaces on which the first groove 24 and the second groove 25 of each set are formed are laminated so as to be aligned with each other. After laminating 12 iron core pieces 20a in such a direction, four iron core pieces 20b are laminated on both sides in the axial direction thereof.

図１５は、積層間を溶接した積層鉄心５０の斜視図である。
図１５の溶接ビードＹに示すように、全ての鉄心片２０ａ、２０ｂを、溶接により軸方向に接合し、積層鉄心５０を得る。なお、溶接により鉄心片２０ａ、２０ｂを接合する際は、図に示す通り、周方向に２つ並んだ第一流路５４を挟んで、軸方向にその近傍部を二列に接合すると溝形成部（薄肉部）の剛性を増し、積層鉄心５０の強度を上げることができる。なお、積層間の結合は、溶接に替えてカシメ等で行ってもよい。 FIG. 15 is a perspective view of the laminated iron core 50 welded between the laminated layers.
As shown in the weld bead Y of FIG. 15, all the iron core pieces 20a and 20b are joined in the axial direction by welding to obtain a laminated iron core 50. When joining the iron core pieces 20a and 20b by welding, as shown in the figure, the groove forming portion is formed by sandwiching the first flow path 54 arranged in the circumferential direction and joining the neighboring portions in two rows in the axial direction. The rigidity of the (thin-walled portion) can be increased, and the strength of the laminated iron core 50 can be increased. The bonding between the laminates may be performed by caulking or the like instead of welding.

次に、磁石挿入部５１ｇに永久磁石４を挿入した後、積層鉄心５０の両端部に端板２９を取り付け、端板２９の中央部に形成されたシャフト挿入孔２９ｓと積層鉄心５０の中央部に形成されたシャフト挿入孔５３にシャフト３を挿入し、焼きばめ、圧入等でシャフト３に積層鉄心５０と端板２９とを固定し、図３に示す回転子２を得る。
本実施の形態１では、鉄心片２０ａ、２０ｂに電磁鋼板を用いているが、ＳＰＣＣ等の磁気特性を有する板状の材料であり、溝加工が可能なものであれば他の板材を用いてもよい。 Next, after inserting the permanent magnet 4 into the magnet insertion portion 51g, end plates 29 are attached to both ends of the laminated iron core 50, and the shaft insertion hole 29s formed in the central portion of the end plate 29 and the central portion of the laminated iron core 50. The shaft 3 is inserted into the shaft insertion hole 53 formed in the above, and the laminated iron core 50 and the end plate 29 are fixed to the shaft 3 by shrink fitting, press fitting, or the like to obtain the rotor 2 shown in FIG.
In the first embodiment, electromagnetic steel sheets are used for the iron core pieces 20a and 20b, but if it is a plate-like material having magnetic characteristics such as SPCC and grooving is possible, another plate material is used. May be good.

図１６は、積層鉄心５０Ｄの斜視図である。
これまでの説明では、二種類の鉄心片２０ａと鉄心片２０ｂとを使用する積層鉄心について説明したが、鉄心片２０ａだけを用いて積層鉄心５０Ｄを構成してもよい。この場合、積層鉄心５０Ｄの内部を通って径方向に抜ける流路を増やすことができ、永久磁石４の冷却効果を向上できる。 FIG. 16 is a perspective view of the laminated iron core 50D.
In the above description, the laminated iron core using two types of iron core pieces 20a and the iron core piece 20b has been described, but the laminated iron core 50D may be formed by using only the iron core piece 20a. In this case, the number of flow paths passing through the inside of the laminated iron core 50D in the radial direction can be increased, and the cooling effect of the permanent magnet 4 can be improved.

本発明の実施の形態１に係る回転電機１００の回転子２および回転電機１００によれば、外部から積層鉄心５０内に流入した冷媒が、軸方向に流れる第三流路から径方向に分岐する第二流路の入り口に第二勾配部を設けることにより、冷媒の流れをスムーズに方向転換できるので、冷媒の圧力損失を抑制し、永久磁石４の冷却効果に優れた回転電機１００の回転子２および、これを用いる回転電機１００を提供できる。 According to the rotor 2 of the rotary electric machine 100 and the rotary electric machine 100 according to the first embodiment of the present invention, the refrigerant flowing into the laminated iron core 50 from the outside branches in the radial direction from the third flow path flowing in the axial direction. By providing the second gradient portion at the entrance of the second flow path, the flow of the refrigerant can be smoothly changed, so that the pressure loss of the refrigerant is suppressed and the rotor of the rotary electric machine 100 having an excellent cooling effect of the permanent magnet 4 is provided. 2 and the rotary electric machine 100 using the same can be provided.

また、積層鉄心５０の第三流路５２は、空隙部５１Ｓの近くに設けられており、空隙部５１Ｓは、第三流路５２から流れてくる冷媒を積層鉄心５０の外部に排出する径方向の流路の一部を形成し、この流路を短くできる。これにより、流路損失を減らして冷媒流量を増やすことができる。また、空隙部５１Ｓは、軸方向にも繋がり、永久磁石４の周方向側面に沿って形成されているので、永久磁石４の冷却効果に優れた回転子２および、これを用いる回転電機１００を得ることができる。 Further, the third flow path 52 of the laminated iron core 50 is provided near the gap portion 51S, and the gap portion 51S is in the radial direction in which the refrigerant flowing from the third flow path 52 is discharged to the outside of the laminated iron core 50. A part of the flow path of the above can be formed, and this flow path can be shortened. As a result, the flow path loss can be reduced and the refrigerant flow rate can be increased. Further, since the gap portion 51S is also connected in the axial direction and is formed along the circumferential side surface of the permanent magnet 4, the rotor 2 having an excellent cooling effect of the permanent magnet 4 and the rotary electric machine 100 using the rotor 2 are used. Obtainable.

また、第三流路５２を、空隙部５１Ｓより径方向内側に配置しているので、第一冷媒流入口２９ｉｎから吸入した冷媒を、全て永久磁石４の周方向側面に流してこれを冷却することができる。これにより、永久磁石４の冷却効果に優れる回転子２および、これを用いる回転電機１００を得ることができる。
また、第三流路５２は、磁極間に配置しているので、永久磁石４が減磁しやすい極間部の冷却能力を高めることができる。これにより、性能が安定した回転子２および、これを用いる回転電機１００を得ることができる。 Further, since the third flow path 52 is arranged radially inside the gap 51S, all the refrigerant sucked from the first refrigerant inflow port 29in is flowed to the circumferential side surface of the permanent magnet 4 to cool it. be able to. As a result, it is possible to obtain a rotor 2 having an excellent cooling effect on the permanent magnet 4 and a rotary electric machine 100 using the rotor 2.
Further, since the third flow path 52 is arranged between the magnetic poles, it is possible to increase the cooling capacity of the interpole portion where the permanent magnet 4 is easily demagnetized. As a result, it is possible to obtain a rotor 2 having stable performance and a rotary electric machine 100 using the rotor 2.

また、第一溝２４は、周方向に隣接する永久磁石４の間に設けているので、回転子２から固定子１に向かう磁路抵抗を増やすことなく、第一流路５４を形成することができる。これにより、永久磁石４の磁束を効率的に利用し、かつ、冷却効果に優れ、磁気特性と冷却特性を両立できる回転子２および、これを用いる回転電機１００を得ることができる。 Further, since the first groove 24 is provided between the permanent magnets 4 adjacent in the circumferential direction, the first flow path 54 can be formed without increasing the magnetic path resistance from the rotor 2 to the stator 1. it can. As a result, it is possible to obtain a rotor 2 that efficiently utilizes the magnetic flux of the permanent magnet 4, has an excellent cooling effect, and can achieve both magnetic characteristics and cooling characteristics, and a rotary electric machine 100 that uses the rotor 2.

また、流路孔２２の径方向の寸法は、周方向の寸法よりも大きくしている。これにより、積層鉄心５０の外部から第三流路５２に流入した冷媒を、スムーズに径方向に流すことができるため、流路損失が低減し、永久磁石４の冷却効果に優れた回転子２および、これを用いる回転電機１００を得ることができる。 Further, the radial dimension of the flow path hole 22 is larger than the circumferential dimension. As a result, the refrigerant that has flowed into the third flow path 52 from the outside of the laminated iron core 50 can be smoothly flowed in the radial direction, so that the flow path loss is reduced and the rotor 2 has an excellent cooling effect on the permanent magnet 4. And, a rotary electric machine 100 using this can be obtained.

また、第一冷媒流入口２９ｉｎは、軸方向両端面に設けられているので、冷媒吸入量が増え、かつ、第一冷媒流入口２９ｉｎの１つ当たりの第三流路の長さを短くできる。これにより、流路の圧力損失を低減させ、積層鉄心５０に吸入できる冷媒流量を増やすことができるので、永久磁石４の冷却効果に優れる回転子２および、これを用いる回転電機１００を得ることができる。 Further, since the first refrigerant inlets 29in are provided on both end surfaces in the axial direction, the amount of refrigerant intake can be increased and the length of the third flow path per one of the first refrigerant inlets 29in can be shortened. .. As a result, the pressure loss in the flow path can be reduced and the flow rate of the refrigerant that can be sucked into the laminated iron core 50 can be increased, so that the rotor 2 having an excellent cooling effect of the permanent magnet 4 and the rotary electric machine 100 using the rotor 2 can be obtained. it can.

また、長孔２１と流路孔２２を形成後、第一溝２４と第二溝２５と第二勾配部２５Ｍと第一勾配部２４Ｍとを設けるため、鉄心片２０ａの切り口に生じる「ばり」を除去することができる。これにより、鉄心片２０ａ、２０ｂを積層する際に、「ばり」の混入を抑制し、組立性、信頼性に優れる回転子２および、これを用いる回転電機１００を得ることができる。 Further, after the elongated hole 21 and the flow path hole 22 are formed, the first groove 24, the second groove 25, the second gradient portion 25M, and the first gradient portion 24M are provided, so that a “burr” generated at the cut end of the iron core piece 20a is provided. Can be removed. As a result, when laminating the iron core pieces 20a and 20b, it is possible to obtain a rotor 2 that suppresses the mixing of "burrs" and is excellent in assemblability and reliability, and a rotary electric machine 100 that uses the rotor 2.

回転電機１００は、積層鉄心５０の軸方向中央部に各径方向の流路が設けられた回転子２を用いているので、一般的に、最も温度が上がりやすい固定子コイル１２の軸方向中央部を、気体冷媒で直接に冷却することが可能であるため、固定子１の冷却効果に優れた回転電機１００を提供できる。 Since the rotary electric machine 100 uses a rotor 2 in which flow paths in each radial direction are provided in the axial center portion of the laminated iron core 50, in general, the axial center of the stator coil 12 where the temperature is most likely to rise is used. Since the portion can be directly cooled by the gaseous refrigerant, it is possible to provide the rotary electric machine 100 having an excellent cooling effect on the stator 1.

さらに、回転子２を構成する、鉄心片２０ａ、２０Ｂａ、２０Ｃａは、鉄心片２０ｂを更にプレス加工して形成されるので、冷媒流路の配置を容易に変更できる。これにより、永久磁石４の発熱量に応じて第一流路５４、第二流路５５を設ける積層数を変更し、永久磁石４の温度が高くなる軸方向中央部を集中的に冷却する等、回転電機１００の設計仕様に合わせた積層鉄心５０を製造することができる。また、多品種に対応しつつ、組立設備を小規模化し、回転子２および、これを用いる回転電機１００の製造コストを下げることができる。 Further, since the iron core pieces 20a, 20Ba, and 20Ca constituting the rotor 2 are formed by further pressing the iron core pieces 20b, the arrangement of the refrigerant flow path can be easily changed. As a result, the number of layers in which the first flow path 54 and the second flow path 55 are provided is changed according to the amount of heat generated by the permanent magnet 4, and the central portion in the axial direction where the temperature of the permanent magnet 4 becomes high is intensively cooled. The laminated iron core 50 can be manufactured according to the design specifications of the rotary electric machine 100. In addition, it is possible to reduce the size of the assembly equipment and reduce the manufacturing cost of the rotor 2 and the rotary electric machine 100 using the rotor 2 while supporting a wide variety of products.

実施の形態２．
以下、本発明の実施の形態２に係る回転電機の回転子および回転電機を図を用いて実施の形態１と異なる部分を中心に説明する。
各図において、実施の形態１と実質的に同じ構成部分に対しては同じ符号を付す。 Embodiment 2.
Hereinafter, the rotor of the rotary electric machine and the rotary electric machine according to the second embodiment of the present invention will be described with reference to the parts different from the first embodiment.
In each figure, substantially the same components as those in the first embodiment are designated by the same reference numerals.

図１７は、本発明の実施の形態２に係る回転子２０２を、その中心軸を通る２つの平面で切断した断面模式図である。
図１８は、本発明の実施の形態２に係る積層鉄心２５０を構成する鉄心片２２０ａの正面図である。
図１９は、図１８、Ｅ部の要部斜視図である。
図２０は、図１８を裏側から見た図である。
図２１は、図１８のＦ−Ｆ線における断面図である。
実施の形態１で説明した回転子２と本実施の形態２に係る回転子２０２との違いは、第三流路２５２のうち、鉄心片２２０ａを積層した部分の径方向の幅を、積層鉄心２５０の軸方向中央に近づくにつれて径方向外側に広がるように拡大している点である。従って、図１７では、鉄心片２２０ａに全て同じ符号を付しているが、図１８〜２１に示す鉄心片２２０ａの流路孔２２２の径方向の幅は、各鉄心片２２０ａにより異なり、積層鉄心２５０の中心側の鉄心片２２０ａほど大きくなる。反対に、図１７、１９に示す第二溝２２５の径方向の幅は、積層鉄心２５０の軸方向の中心側ほど小さくなっている。なお、各鉄心片２２０ａの第二溝２２５の径方向外側の位置は軸方向に揃っている。 FIG. 17 is a schematic cross-sectional view of the rotor 202 according to the second embodiment of the present invention, which is cut by two planes passing through the central axis thereof.
FIG. 18 is a front view of the iron core piece 220a constituting the laminated iron core 250 according to the second embodiment of the present invention.
FIG. 19 is a perspective view of a main part of FIG. 18 and E.
FIG. 20 is a view of FIG. 18 as viewed from the back side.
FIG. 21 is a cross-sectional view taken along the line FF of FIG.
The difference between the rotor 2 described in the first embodiment and the rotor 202 according to the second embodiment is that the radial width of the portion of the third flow path 252 in which the iron core pieces 220a are laminated is set to the laminated iron core. It is a point that expands so as to expand radially outward as it approaches the axial center of 250. Therefore, in FIG. 17, all the iron core pieces 220a are designated by the same reference numerals, but the radial width of the flow path hole 222 of the iron core pieces 220a shown in FIGS. 18 to 21 differs depending on each iron core piece 220a, and the laminated iron core. The iron core piece 220a on the center side of 250 becomes larger. On the contrary, the radial width of the second groove 225 shown in FIGS. 17 and 19 is smaller toward the center side in the axial direction of the laminated iron core 250. The positions of the second groove 225 of each iron core piece 220a on the outer side in the radial direction are aligned in the axial direction.

なお、図１９では、実施の形態１と同様に第二溝２２５と鉄心片空隙部２１Ｓとの境界、第一溝２４と積層鉄心５０の外周との境界には勾配部を設けていないが、これを設けてもよい。また、勾配部の形成面も、第二溝２２５、第一溝２４の形成面と同一面のみでなく、反対面（図２０で示した面）に形成してもよい。 In FIG. 19, a gradient portion is not provided at the boundary between the second groove 225 and the iron core piece gap 21S and the boundary between the first groove 24 and the outer periphery of the laminated iron core 50 as in the first embodiment. This may be provided. Further, the forming surface of the gradient portion may be formed not only on the same surface as the forming surface of the second groove 225 and the first groove 24 but also on the opposite surface (the surface shown in FIG. 20).

次に、図１７を用いて、本実施の形態２に係る回転子２０２における永久磁石４を冷却する機構について説明する。
冷媒を流す各流路の構造、遠心力を利用して冷媒を流す基本的な構成は、実施の形態１と同様である。ただし、遠心力は、同じ角速度で回転する回転体では、中心からの距離に比例するため、第三流路２５２の径方向の幅を拡大すると、積層鉄心２５０の軸方向中央部において第三流路内２５２内の冷媒に生じる遠心力を大きくすることができる。これにより、冷媒の積層鉄心２５０内部への吸引力が増し、積層鉄心２５０内に流入する冷媒量を増やすことができる。さらに、第三流路２５２の外周側の側面のうち、鉄心片２２０ａを積層した部分では、軸方向中心側が、径方向外側に位置する第二勾配部２２５Ｍを有するため、第三流路２５２から第二流路２５５へと曲がる部分で冷媒に生じる曲がり損失を低減させ、永久磁石４の冷却性能を向上することができる。 Next, with reference to FIG. 17, a mechanism for cooling the permanent magnet 4 in the rotor 202 according to the second embodiment will be described.
The structure of each flow path through which the refrigerant flows and the basic configuration in which the refrigerant flows by utilizing centrifugal force are the same as those in the first embodiment. However, since the centrifugal force is proportional to the distance from the center of a rotating body rotating at the same angular velocity, when the radial width of the third flow path 252 is expanded, the third flow occurs at the axial center of the laminated iron core 250. The centrifugal force generated in the refrigerant in the path 252 can be increased. As a result, the suction force of the refrigerant into the laminated iron core 250 is increased, and the amount of the refrigerant flowing into the laminated iron core 250 can be increased. Further, among the outer peripheral side surfaces of the third flow path 252, in the portion where the iron core pieces 220a are laminated, the axial center side has the second gradient portion 225M located on the outer side in the radial direction, so that the third flow path 252 It is possible to reduce the bending loss that occurs in the refrigerant at the portion that bends to the second flow path 255, and improve the cooling performance of the permanent magnet 4.

図２２は、本実施の形態２に係る他の回転子２０２Ｂの断面模式図であり、積層鉄心２５０の他のバリエーションを示す断面模式図である。図２２は、実施の形態１の図１２に対応する。
図２２に示す積層鉄心２５０Ｂは、鉄心片２２０ａに替えて鉄心片２２０Ｂａを積層している。鉄心片２２０ａと鉄心片２２０Ｂａとの違いは、第一勾配部２４ＢＭ、第二勾配部２２５ＢＭの形成面が、各溝部を設けた面と反対面となっている点である。その他、実施の形態１で説明したように、各勾配部は、鉄心片の両面に設けてもよい。また、本実施の形態では、各図において、流路孔２２２を楕円形状としたが、実施の形態１と同じ形状でもよい。 FIG. 22 is a schematic cross-sectional view of another rotor 202B according to the second embodiment, and is a schematic cross-sectional view showing another variation of the laminated iron core 250. FIG. 22 corresponds to FIG. 12 of the first embodiment.
In the laminated iron core 250B shown in FIG. 22, the iron core piece 220Ba is laminated instead of the iron core piece 220a. The difference between the iron core piece 220a and the iron core piece 220Ba is that the forming surface of the first gradient portion 24BM and the second gradient portion 225BM is opposite to the surface on which each groove portion is provided. In addition, as described in the first embodiment, each slope portion may be provided on both sides of the iron core piece. Further, in the present embodiment, the flow path hole 222 has an elliptical shape in each figure, but it may have the same shape as that of the first embodiment.

なお、鉄心片２２０ａの製造方法は基本的に実施の形態１と同じであるが、各積層を構成する鉄心片２２０ａごとの金型もしくは、パンチを径方向にずらして打ち抜く機構が必要となる。 The method of manufacturing the iron core piece 220a is basically the same as that of the first embodiment, but a die for each iron core piece 220a constituting each laminate or a mechanism for punching by shifting the punch in the radial direction is required.

本発明の実施の形態２に係る回転電機の回転子２０２および回転電機によれば、実施の形態１で説明した効果に加えて、以下の効果を奏する。
まず、第三流路２５２のうち、鉄心片２２０ａを積層した部分の径方向の幅を、積層鉄心２５０の軸方向中央に近づくにつれて径方向外側に広がるように拡大しているので、流路の曲がり損失を低減させ、冷媒流量を増やすことができる。これにより永久磁石４の冷却効果に優れる回転子２０２および、これを用いる回転電機を得ることができる。 According to the rotor 202 of the rotary electric machine and the rotary electric machine according to the second embodiment of the present invention, the following effects are exhibited in addition to the effects described in the first embodiment.
First, in the third flow path 252, the radial width of the portion where the iron core pieces 220a are laminated is expanded so as to expand radially outward as it approaches the axial center of the laminated iron core 250. Bending loss can be reduced and the refrigerant flow rate can be increased. As a result, a rotor 202 having an excellent cooling effect on the permanent magnet 4 and a rotating electric machine using the rotor 202 can be obtained.

また、積層鉄心２５０の軸方向中央部において第三流路内の冷媒に生じる遠心力を大きくすることができるので、冷媒の積層鉄心２５０内部への吸引力を増し、流入する冷媒量を増加させることができる。これにより永久磁石４の冷却効果に優れる回転子２０２および、これを用いる回転電機を得ることができる。 Further, since the centrifugal force generated in the refrigerant in the third flow path at the central portion in the axial direction of the laminated iron core 250 can be increased, the suction force of the refrigerant into the laminated iron core 250 is increased, and the amount of the inflowing refrigerant is increased. be able to. As a result, a rotor 202 having an excellent cooling effect on the permanent magnet 4 and a rotating electric machine using the rotor 202 can be obtained.

さらに、第三流路２５２の径方向の幅を、大きな冷却効果が必要な軸方向中央部ほど径方向外側に拡大しているので、第三流路２５２全体としては、第三流路２５２が、積層鉄心２５０内で占有する径方向の幅を抑制できる。これにより、小型で冷却性能に優れる回転子２０２および、これを用いる回転電機を得ることができる。 Further, since the radial width of the third flow path 252 is expanded radially outward toward the central portion in the axial direction where a large cooling effect is required, the third flow path 252 as a whole has the third flow path 252. , The radial width occupied in the laminated iron core 250 can be suppressed. As a result, it is possible to obtain a rotor 202 that is compact and has excellent cooling performance, and a rotary electric machine that uses the rotor 202.

実施の形態３．
以下、本発明の実施の形態３に係る回転電機の回転子および回転電機を図を用いて実施の形態１と異なる部分を中心に説明する。
各図において、実施の形態１と実質的に同じ構成部分に対しては同じ符号を付す。
図２３は、本発明の実施の形態３に係る回転子３０２を、その中心軸を通る２つの平面で切断した断面模式図である。実施の形態１で説明した回転子２と本実施の形態に係る回転子３０２との違いは、回転子３０２では、磁石挿入部５１ｇの外周側壁面と永久磁石４の外周側側面との間および、磁石保持孔５１の内周側壁面と永久磁石４の内周側側面との間の各隙間に、グリス７又は接着剤を塗布して永久磁石４を固着している点である。 Embodiment 3.
Hereinafter, the rotor of the rotary electric machine and the rotary electric machine according to the third embodiment of the present invention will be described with reference to the parts different from the first embodiment.
In each figure, substantially the same components as those in the first embodiment are designated by the same reference numerals.
FIG. 23 is a schematic cross-sectional view of the rotor 302 according to the third embodiment of the present invention, which is cut by two planes passing through the central axis thereof. The difference between the rotor 2 described in the first embodiment and the rotor 302 according to the present embodiment is that in the rotor 302, between the outer peripheral side wall surface of the magnet insertion portion 51 g and the outer peripheral side surface of the permanent magnet 4. A point is that the permanent magnet 4 is fixed by applying grease 7 or an adhesive to each gap between the inner peripheral side wall surface of the magnet holding hole 51 and the inner peripheral side surface of the permanent magnet 4.

これまで説明したように、冷媒は、第一冷媒流入口２９ｉｎから流入し、積層鉄心３５０の内部に形成する第三流路５２、第二流路５５、空隙部５１Ｓ、第一流路５４の各流路を通り、積層鉄心３５０の外部へ流出する。冷媒は、永久磁石４が発生する熱の他に、積層鉄心３５０自身が発生する熱、もしくは他から受ける熱を外部に放熱する役目を担う。そこで、永久磁石４と磁石挿入部５１ｇの径方向間の隙間に、冷媒よりも熱伝導率の高いグリス７又は接着剤を塗布し、永久磁石４から発生する熱を積層鉄心３５０に効率よく伝熱させるために、積層鉄心３５０にヒートシンクの役割を果たさせる。これにより、永久磁石４の冷却性能を更に向上させることができる。 As described above, the refrigerant flows in from the first refrigerant inlet 29in and is formed inside the laminated iron core 350. Each of the third flow path 52, the second flow path 55, the gap 51S, and the first flow path 54. It flows out of the laminated iron core 350 through the flow path. In addition to the heat generated by the permanent magnet 4, the refrigerant has a role of dissipating heat generated by the laminated iron core 350 itself or heat received from others to the outside. Therefore, a grease 7 or an adhesive having a higher thermal conductivity than the refrigerant is applied to the gap between the permanent magnet 4 and the magnet insertion portion 51 g in the radial direction, and the heat generated from the permanent magnet 4 is efficiently transferred to the laminated iron core 350. The laminated iron core 350 acts as a heat sink for heating. Thereby, the cooling performance of the permanent magnet 4 can be further improved.

実施の形態４．
以下、本発明の実施の形態４に係る回転電機の回転子および回転電機を図を用いて実施の形態１と異なる部分を中心に説明する。
各図において、実施の形態１と実質的に同じ構成部分に対しては同じ符号を付す。
図２４は、本発明の実施の形態４に係る回転子４０２を、その中心軸を通る２つの平面で切断した断面模式図である。
図２５は、端板４２９の正面図である。
図２６は、回転子４０２の要部上面図である。
実施の形態１で説明した回転子２と本実施の形態に係る回転子４０２との違いは、積層鉄心５０の軸方向両端面に取り付けた、端板４２９の構成にある。 Embodiment 4.
Hereinafter, the rotor of the rotary electric machine and the rotary electric machine according to the fourth embodiment of the present invention will be described with reference to the parts different from the first embodiment.
In each figure, the same reference numerals are given to the components substantially the same as those in the first embodiment.
FIG. 24 is a schematic cross-sectional view of the rotor 402 according to the fourth embodiment of the present invention, which is cut by two planes passing through the central axis thereof.
FIG. 25 is a front view of the end plate 429.
FIG. 26 is a top view of a main part of the rotor 402.
The difference between the rotor 2 described in the first embodiment and the rotor 402 according to the present embodiment is the configuration of the end plates 429 attached to both end faces in the axial direction of the laminated iron core 50.

端板４２９には、永久磁石４の軸方向端面の一部を外部に露出させる永久磁石露出孔４２９ｇおよび、空隙部５１Ｓを軸方向に外部に開口させる第二冷媒流入口４２９ｉｎを設けている。 The end plate 429 is provided with a permanent magnet exposed hole 429 g that exposes a part of the axial end surface of the permanent magnet 4 to the outside, and a second refrigerant inflow port 429in that opens the gap 51S to the outside in the axial direction.

端板４２９に、空隙部５１Ｓと軸方向に連通する第二冷媒流入口４２９ｉｎを設けることにより、第二冷媒流入口４２９ｉｎからも積層鉄心５０内に冷媒を流入させることができる。これにより、積層鉄心５０内を通る冷媒の流量を増加させ、永久磁石４の冷却性能を向上することができる。 By providing the end plate 429 with a second refrigerant inflow port 429in that communicates with the gap 51S in the axial direction, the refrigerant can flow into the laminated iron core 50 from the second refrigerant inflow port 429in as well. As a result, the flow rate of the refrigerant passing through the laminated iron core 50 can be increased, and the cooling performance of the permanent magnet 4 can be improved.

図２６に符号４で示す部分が、端板４２９の下の永久磁石４が存在する範囲である。端板４２９は、永久磁石４の軸方向への抜けを防止する機能を有するが、永久磁石４の軸方向の端面の全域を押さえる必要はなく、一部でよい。回転子４０２は、所定の速度で回転しているため、冷媒と回転子４０２との接触面は、回転速度と同等速度で冷媒を吹き付けるのと同様の冷却効果を得る。そこで、端板４２９に永久磁石４の軸方向端面を一部露出する永久磁石露出孔４２９ｇを形成することで、外部に露出する永久磁石４の軸方向の端面を直接冷却することが可能となり、永久磁石４の冷却性能を更に向上することができる。 The portion indicated by reference numeral 4 in FIG. 26 is the range in which the permanent magnet 4 under the end plate 429 exists. The end plate 429 has a function of preventing the permanent magnet 4 from coming off in the axial direction, but it is not necessary to press the entire area of the end face of the permanent magnet 4 in the axial direction, and a part of the end plate 429 may be used. Since the rotor 402 is rotating at a predetermined speed, the contact surface between the refrigerant and the rotor 402 obtains a cooling effect similar to that of spraying the refrigerant at a speed equivalent to the rotation speed. Therefore, by forming a permanent magnet exposed hole 429 g in the end plate 429 that partially exposes the axial end face of the permanent magnet 4, it becomes possible to directly cool the axial end face of the permanent magnet 4 exposed to the outside. The cooling performance of the permanent magnet 4 can be further improved.

なお、実施の形態１〜４で説明した各回転子２〜４０２において、鉄心片２０ａ〜２２０Ｂａ、鉄心片２０ｂの枚数、および組み合わせは、各図に限定されるものではない。また、鉄心片２０ａ〜２２０Ｂａ、２０ｂに形成する各孔、溝、勾配部の形状、位置、個数も各図に限定されるものではない。また、永久磁石４の個数、位置、形状もこれに限定されるものではない。また、一つの磁石保持孔５１に複数個の永久磁石を挿入しても問題はない。 In each of the rotors 2 to 402 described in the first to fourth embodiments, the number and combination of the iron core pieces 20a to 220Ba and the iron core pieces 20b are not limited to the respective figures. Further, the shapes, positions, and numbers of the holes, grooves, and slopes formed in the iron core pieces 20a to 220Ba and 20b are not limited to each figure. Further, the number, position, and shape of the permanent magnets 4 are not limited to this. Further, there is no problem even if a plurality of permanent magnets are inserted into one magnet holding hole 51.

また、各実施の形態で示した回転電機において、極数、固定子の仕様（分布巻き、集中巻き、スロット数など）も特に制約はない。 Further, in the rotary electric machine shown in each embodiment, the number of poles and the specifications of the stator (distributed winding, centralized winding, number of slots, etc.) are not particularly limited.

実施の形態５．
以下、本発明の実施の形態５に係る圧縮機を図を用いて説明する。
各図において、実施の形態１と実質的に同じ構成部分に対しては同じ符号を付す。
図２７は、圧縮機１１０の断面図である。
圧縮機１１０は、フレーム１１０Ｆと、実施の形態１に係る回転電機１００と、圧縮機構７０とからなる。 Embodiment 5.
Hereinafter, the compressor according to the fifth embodiment of the present invention will be described with reference to the drawings.
In each figure, substantially the same components as those in the first embodiment are designated by the same reference numerals.
FIG. 27 is a cross-sectional view of the compressor 110.
The compressor 110 includes a frame 110F, a rotary electric machine 100 according to the first embodiment, and a compression mechanism 70.

回転電機１００の回転子のシャフト３は、圧縮機構７０に接続されている。そして、回転電機１００が回転すると、圧縮機構７０が駆動する。このように、回転電機１００を備える圧縮機１１０によれば、高効率で安定性の高い圧縮機を提供できる。本実施の形態では、回転電機１００をエアコン用の圧縮機１１０を駆動するモータに使用する例を示したが回転電機１００の用途はこれに限定するものではない。また、回転子２に替えて、各実施の形態で説明した回転子２０２〜４０２を使用してもよい。 The shaft 3 of the rotor of the rotary electric machine 100 is connected to the compression mechanism 70. Then, when the rotary electric machine 100 rotates, the compression mechanism 70 is driven. As described above, according to the compressor 110 provided with the rotary electric machine 100, it is possible to provide a compressor with high efficiency and high stability. In the present embodiment, an example in which the rotary electric machine 100 is used as a motor for driving a compressor 110 for an air conditioner is shown, but the application of the rotary electric machine 100 is not limited to this. Further, instead of the rotor 2, the rotors 202 to 402 described in each embodiment may be used.

本発明は、その発明の範囲内において、各実施の形態を自由に組み合わせたり、各実施の形態を適宜、変形、省略したりすることが可能である。 In the present invention, each embodiment can be freely combined, and each embodiment can be appropriately modified or omitted within the scope of the invention.

１００ 回転電機、１１０ 圧縮機、１１０Ｆ フレーム、１ 固定子、
２，２０２，２０２Ｂ，３０２，４０２ 回転子、３ シャフト、４ 永久磁石、
１１ 固定子鉄心、１２ 固定子コイル、
２０ａ，２０ｂ，２０Ｂａ，２０Ｃａ，２２０ａ，２２０Ｂａ 鉄心片、２１ 長孔、
２１Ｓ 鉄心片空隙部、２１ｇ 鉄心片磁石挿入部、２２，２２２ 流路孔、
２３ シャフト孔、２４ 第一溝、２４Ｍ，２４ＢＭ、２４ＣＭ 第一勾配部、
２５，２２５ 第二溝、
２５Ｍ，２５ＢＭ，２５ＣＭ，２２５Ｍ，２２５ＢＭ 第二勾配部、２６ 境界部、
２７ 磁気遮断部、２９，４２９ 端板、４２９ｇ 永久磁石露出孔、
２９ｉｎ 第一冷媒流入口、４２９ｉｎ 第二冷媒流入口、２９ｓ シャフト挿入孔、
５０，５０Ｂ，５０Ｃ，５０Ｄ，２５０，２５０Ｂ，３５０ 積層鉄心、
５１ 磁石保持孔、５１ｇ 磁石挿入部、５１Ｓ 空隙部、５２，２５２ 第三流路、
５３ シャフト挿入孔、５４ 第一流路、５５，２５５ 第二流路、５７ 磁気遮断路、７０ 圧縮機構、Ｄ２０ａ，Ｄ２０ｂ 下型、Ｕ２０ａ，Ｕ２０ｂ 上型、
７ グリス、Ｋ 電磁鋼板、Ｙ 溶接ビード。 100 rotary electric machine, 110 compressor, 110F frame, 1 stator,
2,202,202B, 302,402 Rotor, 3 shaft, 4 permanent magnet,
11 stator core, 12 stator coil,
20a, 20b, 20Ba, 20Ca, 220a, 220Ba Iron core piece, 21 long holes,
21S iron core piece gap, 21g iron core piece magnet insertion part, 22,222 flow path hole,
23 shaft hole, 24 first groove, 24M, 24BM, 24CM first gradient part,
25,225 Second groove,
25M, 25BM, 25CM, 225M, 225BM Second gradient part, 26 boundary part,
27 Magnetic block, 29,429 End plate, 429g Permanent magnet exposed hole,
29in 1st refrigerant inlet, 429in 2nd refrigerant inlet, 29s shaft insertion hole,
50, 50B, 50C, 50D, 250, 250B, 350 laminated iron core,
51 magnet holding hole, 51g magnet insertion part, 51S gap part, 52,252 third flow path,
53 Shaft insertion hole, 54 1st flow path, 55, 255 2nd flow path, 57 Magnetic cutoff path, 70 compression mechanism, D20a, D20b lower die, U20a, U20b upper die,
7 Grease, K electromagnetic steel plate, Y weld bead.

Claims (17)

複数の第一鉄心片を積層して形成する積層鉄心と、前記積層鉄心に軸方向に挿入した複数の永久磁石と、前記積層鉄心に挿入したシャフトとを有する回転電機の回転子であって、
前記積層鉄心は、
中央に設けた前記シャフトを挿入するシャフト挿入孔と、
周方向に間隔を空けて、軸方向に貫通するように形成された磁石保持孔と、
隣り合う２つの前記磁石保持孔の間の径方向内側にそれぞれ設けられ、軸方向に貫通し、外部からの冷媒が前記積層鉄心の内部を流れ、外部に排出される流路の一部となる第三流路と、
前記流路の一部であり、前記第三流路から径方向に連通する第二流路と、
前記流路の一部であり、前記磁石保持孔と径方向に連通し、前記積層鉄心の径方向外側に開口する第一流路とを備え、
前記磁石保持孔は、
前記永久磁石を挿入する磁石挿入部と、
前記永久磁石の周方向側面に沿って形成され、前記第二流路から径方向に連通する、前記流路の一部である空隙部とからなり、
前記第一鉄心片は、
前記第一鉄心片が複数枚積層されて前記第三流路となる流路孔と、
前記第一鉄心片が複数枚積層されて前記第二流路となる第二溝と、
前記第一鉄心片が複数枚積層されて前記磁石保持孔となる長孔と、
前記第一鉄心片が複数枚積層されて前記第一流路となる第一溝とを備え、
少なくとも、前記第二溝の内側の端部の軸方向の一面に、面取りされた第二勾配部を備え、
軸方向中央部から軸方向の一方に積層された複数の前記第一鉄心片と、
軸方向の他方に積層された複数の前記第一鉄心片とは、前記第二勾配部が形成された前記第二溝の軸方向の一面が軸方向中央に向いて積層されている回転電機の回転子。 A rotor of a rotary electric machine having a laminated iron core formed by laminating a plurality of first core pieces, a plurality of permanent magnets inserted into the laminated iron core in the axial direction, and a shaft inserted into the laminated iron core.
The laminated iron core
A shaft insertion hole provided in the center for inserting the shaft,
Magnet holding holes formed so as to penetrate in the axial direction at intervals in the circumferential direction,
It is provided on the inside in the radial direction between the two adjacent magnet holding holes, penetrates in the axial direction, and the refrigerant from the outside flows inside the laminated iron core and becomes a part of the flow path discharged to the outside. The third flow path and
A second flow path that is a part of the flow path and communicates radially from the third flow path,
It is provided with a first flow path that is a part of the flow path, communicates with the magnet holding hole in the radial direction, and opens radially outward of the laminated iron core.
The magnet holding hole is
A magnet insertion part for inserting the permanent magnet and
It is composed of a gap portion that is a part of the flow path, which is formed along the circumferential side surface of the permanent magnet and communicates radially from the second flow path.
The first iron core piece is
A flow path hole in which a plurality of the first iron core pieces are laminated to form the third flow path,
A second groove in which a plurality of the first iron core pieces are laminated to form the second flow path,
A long hole in which a plurality of the first iron core pieces are laminated to serve as the magnet holding hole, and
A first groove in which a plurality of the first iron core pieces are laminated to form the first flow path is provided.
At least one surface in the axial direction of the inner end of the second groove is provided with a chamfered second gradient portion.
A plurality of the first iron core pieces laminated from the central portion in the axial direction to one in the axial direction,
The plurality of the first core pieces stacked in the axial direction of the other, the rotating electrical machine one side of the axial direction of the said second slope portion is formed a second groove that are stacked axially oriented center Rotor. 前記第二溝の内側の端部の軸方向の他面に、面取りされた第二勾配部を備える請求項１に記載の回転電機の回転子。 The rotor of a rotary electric machine according to claim 1, further comprising a chamfered second gradient portion on the other surface in the axial direction of the inner end portion of the second groove. 少なくとも、前記第一溝の内側の端部の軸方向の一面に、面取りされた第一勾配部を備える請求項１又は請求項２に記載の回転電機の回転子。 The rotor of the rotary electric machine according to claim 1 or 2, wherein at least one surface of the inner end of the first groove in the axial direction is provided with a chamfered first gradient portion. 少なくとも、前記第二溝と前記長孔の境界の軸方向の一面に、面取りされた勾配部を備える請求項１から請求項３のいずれか１項に記載の回転電機の回転子。 The rotor of a rotary electric machine according to any one of claims 1 to 3, wherein a chamfered slope portion is provided on at least one surface of the boundary between the second groove and the elongated hole in the axial direction. 少なくとも、前記第一溝の外周の縁部の一面に、面取りされた勾配部を備える請求項１から請求項４のいずれか１項に記載の回転電機の回転子。 The rotor of a rotary electric machine according to any one of claims 1 to 4, wherein at least one surface of the outer peripheral edge of the first groove is provided with a chamfered gradient portion. 周方向に並んだ２つの前記第一流路が、それぞれ異なる前記空隙部を介して、１つの前記第二流路に連通する請求項１から請求項５のいずれか１項に記載の回転電機の回転子。 The rotary electric machine according to any one of claims 1 to 5, wherein the two first flow paths arranged in the circumferential direction communicate with one second flow path through different gaps. Rotor. 複数の第一鉄心片を積層して形成する積層鉄心と、前記積層鉄心に軸方向に挿入した複数の永久磁石と、前記積層鉄心に挿入したシャフトとを有する回転電機の回転子であって、
前記積層鉄心は、
中央に設けた前記シャフトを挿入するシャフト挿入孔と、
周方向に間隔を空けて、軸方向に貫通するように形成された磁石保持孔と、
隣り合う２つの前記磁石保持孔の間の径方向内側にそれぞれ設けられ、軸方向に貫通し、外部からの冷媒が前記積層鉄心の内部を流れ、外部に排出される流路の一部となる第三流路と、
前記流路の一部であり、前記第三流路から径方向に連通する第二流路と、
前記流路の一部であり、前記磁石保持孔と径方向に連通し、前記積層鉄心の径方向外側に開口する第一流路とを備え、
前記磁石保持孔は、
前記永久磁石を挿入する磁石挿入部と、
前記永久磁石の周方向側面に沿って形成され、前記第二流路から径方向に連通する、前記流路の一部である空隙部とからなり、
前記第一鉄心片は、
前記第一鉄心片が複数枚積層されて前記第三流路となる流路孔と、
前記第一鉄心片が複数枚積層されて前記第二流路となる第二溝と、
前記第一鉄心片が複数枚積層されて前記磁石保持孔となる長孔と、
前記第一鉄心片が複数枚積層されて前記第一流路となる第一溝とを備え、
少なくとも、前記第二溝の内側の端部の軸方向の一面に、面取りされた第二勾配部を備え、
２つの前記第一流路を合わせた周方向の幅と、前記第二流路の周方向の幅と、前記第三流路の周方向の幅とは同じである回転電機の回転子。 A rotor of a rotary electric machine having a laminated iron core formed by laminating a plurality of first core pieces, a plurality of permanent magnets inserted into the laminated iron core in the axial direction, and a shaft inserted into the laminated iron core.
The laminated iron core
A shaft insertion hole provided in the center for inserting the shaft,
Magnet holding holes formed so as to penetrate in the axial direction at intervals in the circumferential direction,
It is provided on the inside in the radial direction between the two adjacent magnet holding holes, penetrates in the axial direction, and the refrigerant from the outside flows inside the laminated iron core and becomes a part of the flow path discharged to the outside. The third flow path and
A second flow path that is a part of the flow path and communicates radially from the third flow path,
It is provided with a first flow path that is a part of the flow path, communicates with the magnet holding hole in the radial direction, and opens radially outward of the laminated iron core.
The magnet holding hole is
A magnet insertion part for inserting the permanent magnet and
It is composed of a gap portion that is a part of the flow path, which is formed along the circumferential side surface of the permanent magnet and communicates radially from the second flow path.
The first iron core piece is
A flow path hole in which a plurality of the first iron core pieces are laminated to form the third flow path,
A second groove in which a plurality of the first iron core pieces are laminated to form the second flow path,
A long hole in which a plurality of the first iron core pieces are laminated to serve as the magnet holding hole, and
A first groove in which a plurality of the first iron core pieces are laminated to form the first flow path is provided.
At least one surface in the axial direction of the inner end of the second groove is provided with a chamfered second gradient portion.
Two said width of the first channel and the combined circumferential direction, wherein a circumferential width of the second channel, the third flow passage in the circumferential direction of the rotor of the same der Ru rotary electric machine width. 複数の第一鉄心片を積層して形成する積層鉄心と、前記積層鉄心に軸方向に挿入した複数の永久磁石と、前記積層鉄心に挿入したシャフトとを有する回転電機の回転子であって、
前記積層鉄心は、
中央に設けた前記シャフトを挿入するシャフト挿入孔と、
周方向に間隔を空けて、軸方向に貫通するように形成された磁石保持孔と、
隣り合う２つの前記磁石保持孔の間の径方向内側にそれぞれ設けられ、軸方向に貫通し、外部からの冷媒が前記積層鉄心の内部を流れ、外部に排出される流路の一部となる第三流路と、
前記流路の一部であり、前記第三流路から径方向に連通する第二流路と、
前記流路の一部であり、前記磁石保持孔と径方向に連通し、前記積層鉄心の径方向外側に開口する第一流路とを備え、
前記磁石保持孔は、
前記永久磁石を挿入する磁石挿入部と、
前記永久磁石の周方向側面に沿って形成され、前記第二流路から径方向に連通する、前記流路の一部である空隙部とからなり、
前記第一鉄心片は、
前記第一鉄心片が複数枚積層されて前記第三流路となる流路孔と、
前記第一鉄心片が複数枚積層されて前記第二流路となる第二溝と、
前記第一鉄心片が複数枚積層されて前記磁石保持孔となる長孔と、
前記第一鉄心片が複数枚積層されて前記第一流路となる第一溝とを備え、
少なくとも、前記第二溝の内側の端部の軸方向の一面に、面取りされた第二勾配部を備え、
前記第三流路の径方向の幅は、周方向の幅よりも大きい回転電機の回転子。 A rotor of a rotary electric machine having a laminated iron core formed by laminating a plurality of first core pieces, a plurality of permanent magnets inserted into the laminated iron core in the axial direction, and a shaft inserted into the laminated iron core.
The laminated iron core
A shaft insertion hole provided in the center for inserting the shaft,
Magnet holding holes formed so as to penetrate in the axial direction at intervals in the circumferential direction,
It is provided on the inside in the radial direction between the two adjacent magnet holding holes, penetrates in the axial direction, and the refrigerant from the outside flows inside the laminated iron core and becomes a part of the flow path discharged to the outside. The third flow path and
A second flow path that is a part of the flow path and communicates radially from the third flow path,
It is provided with a first flow path that is a part of the flow path, communicates with the magnet holding hole in the radial direction, and opens radially outward of the laminated iron core.
The magnet holding hole is
A magnet insertion part for inserting the permanent magnet and
It is composed of a gap portion that is a part of the flow path, which is formed along the circumferential side surface of the permanent magnet and communicates radially from the second flow path.
The first iron core piece is
A flow path hole in which a plurality of the first iron core pieces are laminated to form the third flow path,
A second groove in which a plurality of the first iron core pieces are laminated to form the second flow path,
A long hole in which a plurality of the first iron core pieces are laminated to serve as the magnet holding hole, and
A first groove in which a plurality of the first iron core pieces are laminated to form the first flow path is provided.
At least one surface in the axial direction of the inner end of the second groove is provided with a chamfered second gradient portion.
The width of the third flow path diameter direction of the circumferential direction of not size rotating electrical machine of the rotor than the width. 複数の第一鉄心片を積層して形成する積層鉄心と、前記積層鉄心に軸方向に挿入した複数の永久磁石と、前記積層鉄心に挿入したシャフトとを有する回転電機の回転子であって、
前記積層鉄心は、
中央に設けた前記シャフトを挿入するシャフト挿入孔と、
周方向に間隔を空けて、軸方向に貫通するように形成された磁石保持孔と、
隣り合う２つの前記磁石保持孔の間の径方向内側にそれぞれ設けられ、軸方向に貫通し、外部からの冷媒が前記積層鉄心の内部を流れ、外部に排出される流路の一部となる第三流路と、
前記流路の一部であり、前記第三流路から径方向に連通する第二流路と、
前記流路の一部であり、前記磁石保持孔と径方向に連通し、前記積層鉄心の径方向外側に開口する第一流路とを備え、
前記磁石保持孔は、
前記永久磁石を挿入する磁石挿入部と、
前記永久磁石の周方向側面に沿って形成され、前記第二流路から径方向に連通する、前記流路の一部である空隙部とからなり、
前記第一鉄心片は、
前記第一鉄心片が複数枚積層されて前記第三流路となる流路孔と、
前記第一鉄心片が複数枚積層されて前記第二流路となる第二溝と、
前記第一鉄心片が複数枚積層されて前記磁石保持孔となる長孔と、
前記第一鉄心片が複数枚積層されて前記第一流路となる第一溝とを備え、
少なくとも、前記第二溝の内側の端部の軸方向の一面に、面取りされた第二勾配部を備え、
軸方向中央部から軸方向の一方に積層された複数の前記第一鉄心片と、
軸方向の他方に積層された複数の前記第一鉄心片とは、表裏が逆に積層されている回転電機の回転子。 A rotor of a rotary electric machine having a laminated iron core formed by laminating a plurality of first core pieces, a plurality of permanent magnets inserted into the laminated iron core in the axial direction, and a shaft inserted into the laminated iron core.
The laminated iron core
A shaft insertion hole provided in the center for inserting the shaft,
Magnet holding holes formed so as to penetrate in the axial direction at intervals in the circumferential direction,
It is provided on the inside in the radial direction between the two adjacent magnet holding holes, penetrates in the axial direction, and the refrigerant from the outside flows inside the laminated iron core and becomes a part of the flow path discharged to the outside. The third flow path and
A second flow path that is a part of the flow path and communicates radially from the third flow path,
It is provided with a first flow path that is a part of the flow path, communicates with the magnet holding hole in the radial direction, and opens radially outward of the laminated iron core.
The magnet holding hole is
A magnet insertion part for inserting the permanent magnet and
It is composed of a gap portion that is a part of the flow path, which is formed along the circumferential side surface of the permanent magnet and communicates radially from the second flow path.
The first iron core piece is
A flow path hole in which a plurality of the first iron core pieces are laminated to form the third flow path,
A second groove in which a plurality of the first iron core pieces are laminated to form the second flow path,
A long hole in which a plurality of the first iron core pieces are laminated to serve as the magnet holding hole, and
A first groove in which a plurality of the first iron core pieces are laminated to form the first flow path is provided.
At least one surface in the axial direction of the inner end of the second groove is provided with a chamfered second gradient portion.
A plurality of the first iron core pieces laminated from the central portion in the axial direction to one in the axial direction,
A plurality of said stacked in the axial direction of the other and the first core piece, front and back that are stacked in the reverse rotation electrical machine rotor. 前記積層鉄心は、軸方向の中央部に複数の前記第一鉄心片が積層され、
積層された前記第一鉄心片の軸方向の両側に、それぞれ複数の第二鉄心片が積層され、
前記第二鉄心片は、
前記第二鉄心片が複数枚積層されて前記第三流路となる流路孔と、
前記第二鉄心片が複数枚積層されて前記磁石保持孔となる長孔とを有する請求項１から請求項９のいずれか１項に記載の回転電機の回転子。 In the laminated iron core, a plurality of the first iron core pieces are laminated in the central portion in the axial direction.
A plurality of second iron core pieces are laminated on both sides of the laminated first iron core piece in the axial direction.
The second iron core piece is
A flow path hole in which a plurality of the second iron core pieces are laminated to form the third flow path,
The rotor of a rotary electric machine according to any one of claims 1 to 9, wherein a plurality of the second iron core pieces are laminated to form an elongated hole serving as the magnet holding hole. 前記第三流路の径方向の幅は、前記積層鉄心の軸方向中央に近づくにつれて径方向外側に広がるように拡大している請求項１から請求項１０のいずれか１項に記載の回転電機の回転子。 The rotary electric machine according to any one of claims 1 to 10, wherein the radial width of the third flow path expands so as to expand radially outward as it approaches the axial center of the laminated iron core. Rotor. 前記永久磁石は、前記磁石保持孔の径方向の両壁面に、グリスまたは接着剤で固着されている請求項１から請求項１１のいずれか１項に記載される回転電機の回転子。 The rotor of a rotating electric machine according to any one of claims 1 to 11, wherein the permanent magnet is fixed to both wall surfaces in the radial direction of the magnet holding hole with grease or an adhesive. 前記積層鉄心の軸方向の両端面に、前記第三流路と連通する第一冷媒流入口を有する端板を備える請求項１から請求項１２のいずれか１項に記載の回転電機の回転子。 The rotor of the rotary electric machine according to any one of claims 1 to 12, further comprising end plates having a first refrigerant inlet communicating with the third flow path on both end faces in the axial direction of the laminated iron core. .. 前記端板は、前記空隙部に連通する、第二冷媒流入口を備える請求項１３に記載の回転電機の回転子。 The rotor of a rotary electric machine according to claim 13, wherein the end plate includes a second refrigerant inlet that communicates with the gap. 前記端板は、前記永久磁石の軸方向端面の一部を外部に露出させる永久磁石露出孔を有する請求項１３又は請求項１４に記載の回転電機の回転子。 The rotor of a rotary electric machine according to claim 13 or 14, wherein the end plate has a permanent magnet exposed hole that exposes a part of the axial end surface of the permanent magnet to the outside. 固定子と、前記固定子の内周面に、所定の間隔を設けて外周面を対向させるように配設された請求項１から請求項１５のいずれか１項に記載の回転子とを備える回転電機。 The rotor according to any one of claims 1 to 15, which is disposed on the inner peripheral surface of the stator so as to face the outer peripheral surfaces at a predetermined interval. Rotating electric machine. 請求項１６に記載の回転電機と、前記回転電機のシャフトに接続された圧縮機構とを備える圧縮機。 A compressor including the rotary electric machine according to claim 16 and a compression mechanism connected to the shaft of the rotary electric machine.
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