JP2015035882A - Stator of dynamo-electric machine - Google Patents

Stator of dynamo-electric machine Download PDF

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Publication number
JP2015035882A
JP2015035882A JP2013165257A JP2013165257A JP2015035882A JP 2015035882 A JP2015035882 A JP 2015035882A JP 2013165257 A JP2013165257 A JP 2013165257A JP 2013165257 A JP2013165257 A JP 2013165257A JP 2015035882 A JP2015035882 A JP 2015035882A
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Prior art keywords
stator
yoke
fastening
outer peripheral
peripheral surface
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JP2013165257A
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岳志 朝永
Takeshi Tomonaga
岳志 朝永
竹原　明秀
Akihide Takehara
明秀 竹原
雄介 衛藤
Yusuke Eto
雄介 衛藤
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Mitsui High Tec Inc
Toyota Motor Corp
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Mitsui High Tec Inc
Toyota Motor Corp
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Priority to JP2013165257A priority Critical patent/JP2015035882A/en
Publication of JP2015035882A publication Critical patent/JP2015035882A/en
Pending legal-status Critical Current

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  • Motor Or Generator Cooling System (AREA)

Abstract

PROBLEM TO BE SOLVED: To prevent a flow of liquid refrigerant on the outer peripheral surface of a yoke from being impeded by a fastening part, in a stator where the fastening part for passing a fastening member is provided to project radially outside from the outer peripheral surface of the yoke.SOLUTION: A stator fastening part 25 for passing a fastening bolt 15 includes first and second fastening parts 35, 36 facing each other in the axial direction of the stator. In the first fastening part 35, a first oil passage 55 is formed between the end on one side of the stator in the circumferential direction and the outer peripheral surface 33a of a yoke 33. In the second fastening part 36, a second oil passage 56 is formed between the end on the other side of the stator in the circumferential direction and the outer peripheral surface 33a of the yoke 33. The first oil passage 55 and the second oil passage 56 are connected in the axial direction of the stator.

Description

本発明は、回転電機のステータに関し、特にその冷却構造に関する。   The present invention relates to a stator for a rotating electrical machine, and more particularly to a cooling structure thereof.

下記特許文献１には、締結用ボルト挿通孔を有する締結部がヨーク外周面より径方向外側へ突出して設けられた積層ステータコアが開示されている。   Patent Document 1 below discloses a laminated stator core in which a fastening portion having a fastening bolt insertion hole is provided so as to protrude radially outward from a yoke outer peripheral surface.

特開２００５−１０３６３８号公報JP 2005-103638 A 特開平７−２６４８１０号公報JP 7-264810 A 特開２００８−２２８５２２号公報JP 2008-228522 A

ステータを冷却しようとヨーク外周面上に液体冷媒を流す際に、特許文献１のように、ボルト締結のための締結部がヨーク外周面より径方向外側へ突出していると、ヨーク外周面上の液体冷媒の流れが締結部により阻害され、ステータの冷却性能が低下する原因となる。   When the liquid refrigerant is allowed to flow on the outer circumferential surface of the yoke to cool the stator, as in Patent Document 1, if the fastening portion for fastening the bolt protrudes radially outward from the outer circumferential surface of the yoke, The flow of the liquid refrigerant is obstructed by the fastening portion, which causes the cooling performance of the stator to deteriorate.

本発明は、締結用部材を通すための締結部がヨーク外周面より径方向外側へ突出して設けられたステータにおいて、ヨーク外周面上に液体冷媒を流して冷却を行う場合に、ヨーク外周面上の液体冷媒の流れが締結部により妨げられるのを抑制することを目的とする。   The present invention provides a stator provided with a fastening portion for passing a fastening member projecting radially outward from the outer circumferential surface of the yoke, when cooling is performed by flowing a liquid refrigerant on the outer circumferential surface of the yoke. It aims at suppressing that the flow of this liquid refrigerant is prevented by the fastening part.

本発明に係る回転電機のステータは、上述した目的を達成するために以下の手段を採った。   The stator of the rotating electrical machine according to the present invention employs the following means in order to achieve the above-described object.

本発明に係る回転電機のステータは、締結用部材を通すための挿通空間が形成された締結部がヨーク外周面より径方向外側へ突出して設けられ、ヨーク外周面上を液体冷媒が流れる回転電機のステータであって、前記締結部は、互いにステータ軸方向に対向する第１及び第２締結部を含み、第１締結部のステータ周方向一方側の端部とヨーク外周面との間に、液体冷媒を通すための第１冷媒通路が形成され、第２締結部のステータ周方向他方側の端部とヨーク外周面との間に、第１冷媒通路とつながり、液体冷媒を通すための第２冷媒通路が形成され、液体冷媒が第１及び第２冷媒通路を通ってヨーク外周面上を流れることを要旨とする。   The stator of the rotating electrical machine according to the present invention is a rotating electrical machine in which a fastening portion in which an insertion space for passing a fastening member is formed protrudes radially outward from the yoke outer peripheral surface, and the liquid refrigerant flows on the yoke outer peripheral surface. The fastening portion includes first and second fastening portions that face each other in the stator axial direction, and between the end portion on one side in the stator circumferential direction of the first fastening portion and the yoke outer peripheral surface, A first refrigerant passage for passing liquid refrigerant is formed, and a first refrigerant passage is connected between the end of the second fastening portion on the other side in the circumferential direction of the stator and the outer peripheral surface of the yoke, and passes through the liquid refrigerant. The gist is that two refrigerant passages are formed and the liquid refrigerant flows on the outer circumferential surface of the yoke through the first and second refrigerant passages.

本発明の一態様では、前記締結部は、ステータ軸方向において第１締結部と第２締結部との間に配置された第３締結部をさらに含み、第３締結部に第３冷媒通路が形成され、第１冷媒通路と第２冷媒通路が第３冷媒通路を介してつながり、第１〜第３冷媒通路は、前記挿通空間と連通しない通路であり、液体冷媒が第１〜第３冷媒通路を通ってヨーク外周面上を流れることが好適である。   In one aspect of the present invention, the fastening portion further includes a third fastening portion disposed between the first fastening portion and the second fastening portion in the stator axial direction, and the third coolant passage is provided in the third fastening portion. Formed, the first refrigerant passage and the second refrigerant passage are connected via the third refrigerant passage, the first to third refrigerant passages are passages that do not communicate with the insertion space, and the liquid refrigerant is the first to third refrigerants. It is preferable to flow on the outer peripheral surface of the yoke through the passage.

本発明によれば、液体冷媒が第１及び第２冷媒通路を通ってヨーク外周面上を流れることで、締結用部材を通すための締結部がヨーク外周面より径方向外側へ突出していても、ヨーク外周面上の液体冷媒の流れが締結部により妨げられるのを抑制することができる。   According to the present invention, the liquid refrigerant flows on the outer peripheral surface of the yoke through the first and second refrigerant passages, so that the fastening portion for passing the fastening member protrudes radially outward from the outer peripheral surface of the yoke. The flow of the liquid refrigerant on the outer peripheral surface of the yoke can be prevented from being obstructed by the fastening portion.

本発明の実施形態１に係るステータの中心軸に沿った方向から見た概略構成を示す図である。It is a figure which shows schematic structure seen from the direction along the central axis of the stator which concerns on Embodiment 1 of this invention. ステータコアの概略構成を示す斜視図である。It is a perspective view which shows schematic structure of a stator core. 第１コア部の中心軸に沿った方向から見た概略構成を示す図である。It is a figure which shows schematic structure seen from the direction along the central axis of a 1st core part. 第２コア部の中心軸に沿った方向から見た概略構成を示す図である。It is a figure which shows schematic structure seen from the direction along the central axis of a 2nd core part. ステータヨーク外周面上の冷却用オイルの流れを説明する図である。It is a figure explaining the flow of the cooling oil on a stator yoke outer peripheral surface. ステータヨーク外周面上の冷却用オイルの流れを説明する図である。It is a figure explaining the flow of the cooling oil on a stator yoke outer peripheral surface. ステータヨーク外周面上の冷却用オイルの流れを説明する図である。It is a figure explaining the flow of the cooling oil on a stator yoke outer peripheral surface. ステータヨーク外周面上の冷却用オイルの流れを説明する図である。It is a figure explaining the flow of the cooling oil on a stator yoke outer peripheral surface. 本発明の実施形態２に係るステータの中心軸に沿った方向から見た概略構成を示す図である。It is a figure which shows schematic structure seen from the direction along the center axis | shaft of the stator which concerns on Embodiment 2 of this invention. ステータコアの概略構成を示す斜視図である。It is a perspective view which shows schematic structure of a stator core. 第１コア部の中心軸に沿った方向から見た概略構成を示す図である。It is a figure which shows schematic structure seen from the direction along the central axis of a 1st core part. 第２コア部の中心軸に沿った方向から見た概略構成を示す図である。It is a figure which shows schematic structure seen from the direction along the central axis of a 2nd core part. 第３コア部の中心軸に沿った方向から見た概略構成を示す図である。It is a figure which shows schematic structure seen from the direction along the central axis of a 3rd core part. ステータヨーク外周面上の冷却用オイルの流れを説明する図である。It is a figure explaining the flow of the cooling oil on a stator yoke outer peripheral surface. ステータヨーク外周面上の冷却用オイルの流れを説明する図である。It is a figure explaining the flow of the cooling oil on a stator yoke outer peripheral surface. ステータヨーク外周面上の冷却用オイルの流れを説明する図である。It is a figure explaining the flow of the cooling oil on a stator yoke outer peripheral surface. ステータヨーク外周面上の冷却用オイルの流れを説明する図である。It is a figure explaining the flow of the cooling oil on a stator yoke outer peripheral surface.

以下、本発明を実施するための形態（以下実施形態という）を図面に従って説明する。   DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described with reference to the drawings.

「実施形態１」
図１は、本発明の実施形態１に係る回転電機のステータの概略構成を示す図であり、ステータの中心軸１０に沿った方向から見た図を示す。以下の説明において、ステータ軸方向は、ステータの中心軸１０に沿った方向であり、ステータ周方向は、ステータの中心軸１０まわりに沿った方向であり、ステータ径方向は、ステータの中心軸１０（ステータ軸方向）と直交する方向である。 “Embodiment 1”
FIG. 1 is a diagram showing a schematic configuration of a stator of a rotating electrical machine according to Embodiment 1 of the present invention, and shows a diagram viewed from a direction along a central axis 10 of the stator. In the following description, the stator axial direction is a direction along the central axis 10 of the stator, the stator circumferential direction is a direction along the central axis 10 of the stator, and the stator radial direction is the central axis 10 of the stator. It is a direction orthogonal to the (stator axial direction).

本実施形態に係るステータは、ステータコア２１とコイル２２を含んで構成される。ステータコア２１は、ステータ周方向に沿って延びる環状のステータヨーク２３と、ステータヨーク２３の内周面よりステータ径方向内側（図示しないロータ側）へ突出する複数のステータティース２４と、ステータヨーク２３の外周面２３ａよりステータ径方向外側へ突出し、締結用ボルト（締結用部材）１５を通すための複数のステータ締結部（耳部）２５とを含む。複数のステータティース２４はステータ周方向に互いに間隔をおいて（等間隔で）配置され、各ステータティース２４にコイル２２が巻装されている。複数のステータ締結部２５も、ステータ周方向に互いに間隔をおいて（等間隔で）配置されている。ステータ（ステータコア２１）は、ステータ軸方向が例えば鉛直方向と垂直（あるいはほぼ垂直）になるように配置されることが好ましいが、ステータ軸方向が水平方向に対して若干傾斜していてもよい。冷却パイプ１２は、ステータヨーク２３の外周面２３ａにおける最も鉛直上方位置より鉛直上方（直上）に配置され、図１の矢印Ａに示すように、冷却パイプ１２からステータヨーク２３の外周面２３ａ上に液体冷媒としての冷却用オイルが供給される。図１の矢印Ｂに示すように、冷却用オイルがステータヨーク２３の外周面２３ａ上を流れることで、ステータの冷却が行われる。   The stator according to this embodiment includes a stator core 21 and a coil 22. The stator core 21 includes an annular stator yoke 23 that extends along the circumferential direction of the stator, a plurality of stator teeth 24 that protrude from the inner circumferential surface of the stator yoke 23 toward the inside in the stator radial direction (the rotor side not shown), A plurality of stator fastening portions (ear portions) 25 for projecting outward from the outer peripheral surface 23a in the radial direction of the stator and for passing fastening bolts (fastening members) 15 are included. The plurality of stator teeth 24 are arranged at regular intervals in the circumferential direction of the stator (equal intervals), and a coil 22 is wound around each stator tooth 24. The plurality of stator fastening portions 25 are also arranged at regular intervals (equal intervals) in the stator circumferential direction. The stator (stator core 21) is preferably arranged so that the stator axial direction is perpendicular (or substantially perpendicular) to the vertical direction, for example, but the stator axial direction may be slightly inclined with respect to the horizontal direction. The cooling pipe 12 is arranged vertically upward (directly above) from the most vertically upper position on the outer peripheral surface 23a of the stator yoke 23, and as shown by an arrow A in FIG. 1, the cooling pipe 12 is placed on the outer peripheral surface 23a of the stator yoke 23. Cooling oil is supplied as a liquid refrigerant. As indicated by an arrow B in FIG. 1, the cooling oil flows on the outer peripheral surface 23a of the stator yoke 23, whereby the stator is cooled.

ステータコア２１は、図２に示すように、第１コア部３１と第２コア部３２をステータ軸方向に交互に複数積み重ねて構成される。第１コア部３１は、図３に示すように、ステータ周方向に沿って延びる環状のヨーク部３３と、ヨーク部３３の内周面よりステータ径方向内側へ突出する複数のティース部３４と、ヨーク部３３の外周面３３ａよりステータ径方向外側へ突出する複数の第１及び第２締結部３５，３６とを含み、例えば積層鋼板をステータ軸方向に複数積層して構成することが可能である。第１締結部３５と第２締結部３６は、ステータ周方向に互いに間隔をおいて（等間隔で）交互に配置されている。図３の例では、３つの第１締結部３５と３つの第２締結部３６が設けられている。   As shown in FIG. 2, the stator core 21 is configured by alternately stacking a plurality of first core portions 31 and second core portions 32 in the stator axial direction. As shown in FIG. 3, the first core portion 31 includes an annular yoke portion 33 extending along the circumferential direction of the stator, a plurality of teeth portions 34 projecting inward in the stator radial direction from the inner circumferential surface of the yoke portion 33, and It includes a plurality of first and second fastening portions 35 and 36 that protrude outward in the stator radial direction from the outer peripheral surface 33a of the yoke portion 33. For example, a plurality of laminated steel plates can be laminated in the stator axial direction. . The first fastening portions 35 and the second fastening portions 36 are alternately arranged at regular intervals (equal intervals) in the stator circumferential direction. In the example of FIG. 3, three first fastening portions 35 and three second fastening portions 36 are provided.

第１及び第２締結部３５，３６には、締結用ボルト１５を通すためのボルト挿通空間４５，４６が形成されている。第１締結部３５においては、ステータ周方向一方側の端部とヨーク部３３の外周面３３ａとの間に切り欠きが形成されていることで、冷却用オイルを通すための第１オイル通路５５が形成されており、ステータ周方向他方側の端部でヨーク部３３とつながっている。第１オイル通路５５は、ボルト挿通空間４５まで延びて形成され、ボルト挿通空間４５とつながった空間となっている。一方、第２締結部３６においては、ステータ周方向他方側の端部とヨーク部３３の外周面３３ａとの間に切り欠きが形成されていることで、冷却用オイルを通すための第２オイル通路５６が形成されており、ステータ周方向一方側の端部でヨーク部３３とつながっている。第２オイル通路５６は、ボルト挿通空間４６まで延びて形成され、ボルト挿通空間４６とつながった空間となっている。   Bolt insertion spaces 45 and 46 for passing the fastening bolts 15 are formed in the first and second fastening portions 35 and 36. In the first fastening portion 35, a notch is formed between the end portion on one side in the circumferential direction of the stator and the outer peripheral surface 33 a of the yoke portion 33, so that a first oil passage 55 for allowing cooling oil to pass therethrough. And is connected to the yoke portion 33 at the end portion on the other side in the stator circumferential direction. The first oil passage 55 extends to the bolt insertion space 45 and is a space connected to the bolt insertion space 45. On the other hand, in the second fastening portion 36, a notch is formed between the end portion on the other side in the circumferential direction of the stator and the outer peripheral surface 33a of the yoke portion 33, so that the second oil for allowing the cooling oil to pass therethrough. A passage 56 is formed, and is connected to the yoke portion 33 at one end in the circumferential direction of the stator. The second oil passage 56 is formed to extend to the bolt insertion space 46 and is a space connected to the bolt insertion space 46.

第２コア部３２も、図４に示すように、第１コア部３１と同様の構成であり、ヨーク部３３と複数のティース部３４と複数の第１及び第２締結部３５，３６とを含み、例えば積層鋼板をステータ軸方向に複数積層して構成することが可能である。第１コア部３１のヨーク部３３と第２コア部３２のヨーク部３３をステータ軸方向に交互に複数積み重ねることでステータヨーク２３が形成され、第１コア部３１のティース部３４と第２コア部３２のティース部３４をステータ軸方向に交互に複数積み重ねることでステータティース２４が形成される。ただし、第１コア部３１と第２コア部３２をステータ軸方向に交互に複数積み重ねる際には、第１コア部３１と第２コア部３２とでステータ周方向の角度を（図３，４の例では６０°）ずらして、図２に示すように、第１コア部３１の第１締結部３５と第２コア部３２の第２締結部３６（第１コア部３１の第２締結部３６と第２コア部３２の第１締結部３５）がステータ軸方向に対向するように転積する。第１締結部３５と第２締結部３６をステータ軸方向に交互に複数積み重ねることでステータ締結部２５が形成され、ボルト挿通空間４５，４６がステータ軸方向につながるとともに、第１オイル通路５５と第２オイル通路５６がステータ軸方向につながる。締結用ボルト１５をボルト挿通空間４５，４６に通してねじ締結を行うことで、第１及び第２コア部３１，３２（積層鋼板）の締結を行うことができるとともに、ステータコア２１を図示しないケーシングに固定することができる。   As shown in FIG. 4, the second core portion 32 has the same configuration as the first core portion 31, and includes a yoke portion 33, a plurality of teeth portions 34, and a plurality of first and second fastening portions 35, 36. For example, a plurality of laminated steel plates can be laminated in the stator axial direction. The stator yoke 23 is formed by alternately stacking a plurality of yoke portions 33 of the first core portion 31 and yoke portions 33 of the second core portion 32 in the stator axial direction, and the teeth portion 34 and the second core of the first core portion 31 are formed. The stator teeth 24 are formed by alternately stacking a plurality of teeth 34 of the portion 32 in the stator axial direction. However, when a plurality of the first core portions 31 and the second core portions 32 are alternately stacked in the stator axial direction, the angle in the stator circumferential direction between the first core portions 31 and the second core portions 32 (FIGS. 3 and 4). As shown in FIG. 2, the first fastening portion 35 of the first core portion 31 and the second fastening portion 36 of the second core portion 32 (the second fastening portion of the first core portion 31) are shifted. 36 and the 1st fastening part 35 of the 2nd core part 32 roll so that it may oppose a stator axial direction. The stator fastening portion 25 is formed by alternately stacking a plurality of first fastening portions 35 and second fastening portions 36 in the stator axial direction, the bolt insertion spaces 45 and 46 are connected in the stator axial direction, and the first oil passage 55 and The second oil passage 56 is connected in the stator axial direction. The first and second core portions 31 and 32 (laminated steel plates) can be fastened by passing the fastening bolts 15 through the bolt insertion spaces 45 and 46, and the stator core 21 is not shown in the casing. Can be fixed to.

冷却パイプ１２からステータヨーク外周面２３ａ上に供給された冷却用オイルは、重力により鉛直下方へ流れようとするため、ステータヨーク外周面２３ａ上を伝ってステータ周方向に流れる。その際に、締結用ボルト１５を通すためのステータ締結部２５がステータヨーク外周面２３ａよりステータ径方向外側へ突出することで冷却用オイルの流れが阻害されると、ステータの冷却性能が低下する原因となる。これに対して本実施形態では、ステータ周方向一方側の端部がステータ周方向他方側の端部より鉛直上方に位置するステータ締結部２５については、図５の矢印Ｃに示すように、ステータ締結部２５よりステータ周方向一方側（鉛直上方）に位置するステータヨーク外周面２３ａ−１上を流れる冷却用オイルが第１オイル通路５５に流れ込む。第１オイル通路５５と第２オイル通路５６はステータ軸方向につながった空間となっているため、冷却用オイルは第１オイル通路５５から第２オイル通路５６に流れ込む。第２オイル通路５６に流れ込んだ冷却用オイルは、図６の矢印Ｄに示すように、ステータ締結部２５よりステータ周方向他方側（鉛直下方）に位置するステータヨーク外周面２３ａ−２上へ流れ出す。一方、ステータ周方向他方側の端部がステータ周方向一方側の端部より鉛直上方に位置するステータ締結部２５については、図７の矢印Ｅに示すように、ステータ締結部２５よりステータ周方向他方側（鉛直上方）に位置するステータヨーク外周面２３ａ−１上を流れる冷却用オイルが第２オイル通路５６に流れ込む。そして、冷却用オイルは、図８の矢印Ｆに示すように、第１オイル通路５５から流れ出し、ステータ締結部２５よりステータ周方向一方側（鉛直下方）に位置するステータヨーク外周面２３ａ−３上を流れる。   Since the cooling oil supplied from the cooling pipe 12 onto the stator yoke outer peripheral surface 23a tends to flow vertically downward due to gravity, the oil flows along the stator yoke outer peripheral surface 23a in the circumferential direction of the stator. At that time, if the stator fastening portion 25 for passing the fastening bolt 15 protrudes outward in the stator radial direction from the stator yoke outer peripheral surface 23a, the cooling oil flow is inhibited, so that the cooling performance of the stator is lowered. Cause. On the other hand, in the present embodiment, the stator fastening portion 25 in which the end portion on the one side in the stator circumferential direction is located vertically above the end portion on the other side in the stator circumferential direction, as shown by an arrow C in FIG. Cooling oil that flows on the stator yoke outer peripheral surface 23 a-1 located on one side (vertically upward) of the stator in the circumferential direction from the fastening portion 25 flows into the first oil passage 55. Since the first oil passage 55 and the second oil passage 56 are spaces connected in the stator axial direction, the cooling oil flows from the first oil passage 55 into the second oil passage 56. The cooling oil that has flowed into the second oil passage 56 flows out from the stator fastening portion 25 onto the stator yoke outer peripheral surface 23a-2 located on the other side in the stator circumferential direction (vertically below), as indicated by an arrow D in FIG. . On the other hand, with respect to the stator fastening portion 25 in which the end portion on the other side in the stator circumferential direction is located vertically above the end portion on the one side in the stator circumferential direction, as shown by an arrow E in FIG. Cooling oil flowing on the stator yoke outer peripheral surface 23 a-1 located on the other side (vertically upward) flows into the second oil passage 56. Then, as shown by an arrow F in FIG. 8, the cooling oil flows out from the first oil passage 55 and is on the stator yoke outer peripheral surface 23a-3 located on the stator circumferential one side (vertically below) from the stator fastening portion 25. Flowing.

このように、本実施形態では、冷却用オイルは、ステータ締結部２５に形成された第１及び第２オイル通路５５，５６を通って、ステータヨーク外周面２３ａ上を流れる。そのため、締結用ボルト１５を通すためのステータ締結部２５がステータヨーク外周面２３ａよりステータ径方向外側へ突出していても、ステータヨーク外周面２３ａ上を伝う冷却用オイルの流れがステータ締結部２５により妨げられるのを抑制することができる。その結果、ステータヨーク外周面２３ａの下部まで冷却用オイルを流すことができ、ステータの冷却性能の低下を防ぐことができる。   Thus, in this embodiment, the cooling oil flows on the stator yoke outer peripheral surface 23a through the first and second oil passages 55 and 56 formed in the stator fastening portion 25. Therefore, even if the stator fastening portion 25 for passing the fastening bolt 15 protrudes outward in the stator radial direction from the stator yoke outer peripheral surface 23a, the flow of cooling oil transmitted on the stator yoke outer peripheral surface 23a is caused by the stator fastening portion 25. It is possible to suppress obstruction. As a result, the cooling oil can be flowed to the lower part of the stator yoke outer peripheral surface 23a, and the cooling performance of the stator can be prevented from deteriorating.

さらに、本実施形態では、第１及び第２締結部３５，３６が設けられた同じ構造の第１コア部３１と第２コア部３２を、ステータ周方向の角度を互いにずらしてステータ軸方向に転積することで、冷却用オイルを通すための第１及び第２オイル通路５５，５６をステータ締結部２５に形成することができる。そのため、積層鋼板は１種類で済み、ステータコア２１の構造を簡略化することができる。   Further, in the present embodiment, the first core portion 31 and the second core portion 32 having the same structure provided with the first and second fastening portions 35 and 36 are moved in the stator axial direction by shifting the angle in the stator circumferential direction from each other. By rolling, the first and second oil passages 55 and 56 for passing the cooling oil can be formed in the stator fastening portion 25. Therefore, only one type of laminated steel plate is required, and the structure of the stator core 21 can be simplified.

「実施形態２」
図９〜１３は、本発明の実施形態２に係る回転電機のステータの概略構成を示す図である。以下の実施形態２の説明では、実施形態１と同様の構成または対応する構成には同一の符号を付し、説明を省略する構成については実施形態１と同様である。 “Embodiment 2”
FIGS. 9-13 is a figure which shows schematic structure of the stator of the rotary electric machine which concerns on Embodiment 2 of this invention. In the following description of the second embodiment, the same or corresponding components as those in the first embodiment are denoted by the same reference numerals, and the components that are not described are the same as those in the first embodiment.

本実施形態では、ステータコア２１は、図１０に示すように、第１コア部３１と第３コア部３０と第２コア部３２をステータ軸方向に複数積み重ねて構成される。第３コア部３０は、ステータ軸方向において第１コア部３１と第２コア部３２との間に挟まれて配置され、ステータ軸方向の一方側から他方側に、第１コア部３１→第３コア部３０→第２コア部３２の順に配置されている。第１コア部３１は、図１１に示すように、ヨーク部３３と、複数のティース部３４と、ヨーク部３３の外周面３３ａよりステータ径方向外側へ突出する第１〜第３締結部３５〜３７を含む。第１〜第３締結部３５〜３７は、ステータ周方向に互いに間隔をおいて（等間隔で）配置され、第３締結部３７がステータ周方向において第１締結部３５と第２締結部３６との間の位置に配置されている。   In the present embodiment, the stator core 21 is configured by stacking a plurality of first core parts 31, third core parts 30, and second core parts 32 in the stator axial direction, as shown in FIG. The third core part 30 is disposed between the first core part 31 and the second core part 32 in the stator axial direction, and the first core part 31 → the first core part 31 is arranged from one side to the other side in the stator axial direction. The three core portions 30 are arranged in the order of the second core portion 32. As shown in FIG. 11, the first core portion 31 includes a yoke portion 33, a plurality of teeth portions 34, and first to third fastening portions 35 to 35 that protrude outward in the stator radial direction from the outer peripheral surface 33 a of the yoke portion 33. 37. The 1st-3rd fastening parts 35-37 are mutually arrange | positioned at intervals (equal intervals) in the stator circumferential direction, and the 3rd fastening part 37 is the 1st fastening part 35 and the 2nd fastening part 36 in the stator circumferential direction. It is arranged at a position between.

第１〜第３締結部３５〜３７には、締結用ボルト１５を通すためのボルト挿通空間（ボルト挿通穴）４５〜４７が形成されている。第１締結部３５においては、ステータ周方向一方側の端部とヨーク部３３の外周面３３ａとの間に切り欠きが形成されていることで、冷却用オイルを通すための第１オイル通路５５が形成されており、ステータ周方向他方側の端部でヨーク部３３とつながっている。第１オイル通路５５は、ボルト挿通穴４５と連通しない別空間となっている。一方、第２締結部３６においては、ステータ周方向他方側の端部とヨーク部３３の外周面３３ａとの間に切り欠きが形成されていることで、冷却用オイルを通すための第２オイル通路５６が形成されており、ステータ周方向一方側の端部でヨーク部３３とつながっている。第２オイル通路５６は、ボルト挿通穴４６と連通しない別空間となっている。また、第３締結部３７においては、ステータ周方向一方側及び他方側の両端部でヨーク部３３とつながっており、ステータ周方向中央部に貫通穴が形成されていることで、冷却用オイルを通すための第３オイル通路５７が形成されている。第３オイル通路５７は、ボルト挿通穴４７と連通しない別空間となっている。   Bolt insertion spaces (bolt insertion holes) 45 to 47 for passing the fastening bolts 15 are formed in the first to third fastening portions 35 to 37. In the first fastening portion 35, a notch is formed between the end portion on one side in the circumferential direction of the stator and the outer peripheral surface 33 a of the yoke portion 33, so that a first oil passage 55 for allowing cooling oil to pass therethrough. And is connected to the yoke portion 33 at the end portion on the other side in the stator circumferential direction. The first oil passage 55 is a separate space that does not communicate with the bolt insertion hole 45. On the other hand, in the second fastening portion 36, a notch is formed between the end portion on the other side in the circumferential direction of the stator and the outer peripheral surface 33a of the yoke portion 33, so that the second oil for allowing the cooling oil to pass therethrough. A passage 56 is formed, and is connected to the yoke portion 33 at one end in the circumferential direction of the stator. The second oil passage 56 is a separate space that does not communicate with the bolt insertion hole 46. Moreover, in the 3rd fastening part 37, it connects with the yoke part 33 in the stator circumferential direction one side and the other side both ends, and the through-hole is formed in the stator circumferential direction center part, so that the cooling oil is supplied. A third oil passage 57 is formed for passage therethrough. The third oil passage 57 is a separate space that does not communicate with the bolt insertion hole 47.

第２コア部３２及び第３コア部３０も、図１２，１３に示すように、第１コア部３１と同様の構成であり、ヨーク部３３と複数のティース部３４と第１〜第３締結部３５〜３７とを含む。第１コア部３１のヨーク部３３と第３コア部３０のヨーク部３３と第２コア部３２のヨーク部３３をステータ軸方向に複数積み重ねることでステータヨーク２３が形成され、第１コア部３１のティース部３４と第３コア部３０のティース部３４と第２コア部３２のティース部３４をステータ軸方向に複数積み重ねることでステータティース２４が形成される。ただし、第１コア部３１と第３コア部３０と第２コア部３２をステータ軸方向に複数積み重ねる際には、第１コア部３１と第３コア部３０と第２コア部３２とでステータ周方向の角度を互いに（図１１〜１３の例では１２０°）ずらして、ステータ軸方向において第３締結部３７が第１締結部３５と第２締結部３６との間に挟まれるように転積する。第１締結部３５と第３締結部３７と第２締結部３６をステータ軸方向に複数積み重ねることでステータ締結部２５が形成され、ボルト挿通穴４５〜４７がステータ軸方向につながる。さらに、第１オイル通路５５と第３オイル通路５７がステータ軸方向につながる部分を有し、第２オイル通路５６と第３オイル通路５７がステータ軸方向につながる部分を有することで、第１オイル通路５５と第２オイル通路５６が第３オイル通路５７を介してステータ軸方向につながる。締結用ボルト１５をボルト挿通穴４５〜４７に通してねじ締結を行うことで、第１コア部３１と第３コア部３０と第２コア部３２の締結を行うことができるとともに、ステータコア２１を図示しないケーシングに固定することができる。   As shown in FIGS. 12 and 13, the second core portion 32 and the third core portion 30 have the same configuration as the first core portion 31, and the yoke portion 33, the plurality of teeth portions 34, and the first to third fastenings. Parts 35-37. The stator yoke 23 is formed by stacking a plurality of yoke portions 33 of the first core portion 31, yoke portions 33 of the third core portion 30 and yoke portions 33 of the second core portion 32 in the stator axial direction, and the first core portion 31 is formed. The stator teeth 24 are formed by stacking a plurality of the tooth portions 34, the tooth portions 34 of the third core portion 30 and the teeth portions 34 of the second core portion 32 in the stator axial direction. However, when a plurality of the first core part 31, the third core part 30, and the second core part 32 are stacked in the stator axial direction, the first core part 31, the third core part 30, and the second core part 32 form a stator. The circumferential angles are shifted from each other (120 ° in the example of FIGS. 11 to 13) so that the third fastening portion 37 is sandwiched between the first fastening portion 35 and the second fastening portion 36 in the stator axial direction. Pile up. A plurality of first fastening portions 35, third fastening portions 37, and second fastening portions 36 are stacked in the stator axial direction to form the stator fastening portion 25, and the bolt insertion holes 45 to 47 are connected in the stator axial direction. Further, the first oil passage 55 and the third oil passage 57 have a portion connected in the stator axial direction, and the second oil passage 56 and the third oil passage 57 have a portion connected in the stator axial direction, so that the first oil passage The passage 55 and the second oil passage 56 are connected in the stator axial direction via the third oil passage 57. The first core part 31, the third core part 30, and the second core part 32 can be fastened by passing the fastening bolt 15 through the bolt insertion holes 45 to 47, and the stator core 21 can be fastened. It can be fixed to a casing (not shown).

本実施形態では、ステータ周方向一方側の端部がステータ周方向他方側の端部より鉛直上方に位置するステータ締結部２５については、図１４の矢印Ｃに示すように、ステータ締結部２５よりステータ周方向一方側（鉛直上方）に位置するステータヨーク外周面２３ａ−１上を流れる冷却用オイルが第１オイル通路５５に流れ込む。第１オイル通路５５と第２オイル通路５６は第３オイル通路５７を介してステータ軸方向につながった空間となっているため、冷却用オイルは第１オイル通路５５から第３オイル通路５７を通って第２オイル通路５６に流れ込む。第２オイル通路５６に流れ込んだ冷却用オイルは、図１５の矢印Ｄに示すように、ステータ締結部２５よりステータ周方向他方側（鉛直下方）に位置するステータヨーク外周面２３ａ−２上へ流れ出す。一方、ステータ周方向他方側の端部がステータ周方向一方側の端部より鉛直上方に位置するステータ締結部２５については、図１６の矢印Ｅに示すように、ステータ締結部２５よりステータ周方向他方側（鉛直上方）に位置するステータヨーク外周面２３ａ−１上を流れる冷却用オイルが第２オイル通路５６に流れ込む。そして、冷却用オイルは、図１７の矢印Ｆに示すように、第３オイル通路５７を通って第１オイル通路５５から流れ出し、ステータ締結部２５よりステータ周方向一方側（鉛直下方）に位置するステータヨーク外周面２３ａ−３上を流れる。   In the present embodiment, the stator fastening portion 25 in which the end portion on the one side in the stator circumferential direction is positioned vertically above the end portion on the other side in the stator circumferential direction, as shown by the arrow C in FIG. Cooling oil flowing on the stator yoke outer peripheral surface 23 a-1 located on one side (vertically upward) of the stator in the circumferential direction flows into the first oil passage 55. Since the first oil passage 55 and the second oil passage 56 are spaces connected in the stator axial direction via the third oil passage 57, the cooling oil passes from the first oil passage 55 through the third oil passage 57. Into the second oil passage 56. The cooling oil that has flowed into the second oil passage 56 flows out from the stator fastening portion 25 onto the stator yoke outer peripheral surface 23a-2 located on the other side in the stator circumferential direction (vertically below), as indicated by an arrow D in FIG. . On the other hand, with respect to the stator fastening portion 25 in which the end portion on the other side in the stator circumferential direction is located vertically above the end portion on the one side in the stator circumferential direction, as shown by an arrow E in FIG. Cooling oil flowing on the stator yoke outer peripheral surface 23 a-1 located on the other side (vertically upward) flows into the second oil passage 56. Then, as shown by an arrow F in FIG. 17, the cooling oil flows out from the first oil passage 55 through the third oil passage 57 and is positioned on one side (vertically below) in the stator circumferential direction from the stator fastening portion 25. It flows on the stator yoke outer peripheral surface 23a-3.

このように、本実施形態では、冷却用オイルは、ステータ締結部２５に形成された第１〜第３オイル通路５５〜５７を通って、ステータヨーク外周面２３ａ上を流れる。そのため、締結用ボルト１５を通すためのステータ締結部２５がステータヨーク外周面２３ａよりステータ径方向外側へ突出していても、ステータヨーク外周面２３ａ上を伝う冷却用オイルの流れがステータ締結部２５により妨げられるのを抑制することができる。さらに、第１〜第３締結部３５〜３７が設けられた同じ構造の第１コア部３１と第３コア部３０と第２コア部３２を、ステータ周方向の角度を互いにずらしてステータ軸方向に転積することで、冷却用オイルを通すための第１〜第３オイル通路５５〜５７をステータ締結部２５に形成することができる。そのため、積層鋼板は１種類で済み、ステータコア２１の構造を簡略化することができる。   Thus, in this embodiment, the cooling oil flows on the stator yoke outer peripheral surface 23a through the first to third oil passages 55 to 57 formed in the stator fastening portion 25. Therefore, even if the stator fastening portion 25 for passing the fastening bolt 15 protrudes outward in the stator radial direction from the stator yoke outer peripheral surface 23a, the flow of cooling oil transmitted on the stator yoke outer peripheral surface 23a is caused by the stator fastening portion 25. It is possible to suppress obstruction. Further, the first core portion 31, the third core portion 30, and the second core portion 32 having the same structure provided with the first to third fastening portions 35 to 37 are shifted in the stator circumferential direction with respect to each other in the stator axial direction. The first to third oil passages 55 to 57 for allowing the cooling oil to pass through can be formed in the stator fastening portion 25. Therefore, only one type of laminated steel plate is required, and the structure of the stator core 21 can be simplified.

さらに、本実施形態では、ボルト挿通穴４５〜４７とは別に第１〜第３オイル通路５５〜５７をステータ締結部２５に設けているため、ステータ締結部２５の剛性を向上させることができ、締結用ボルト１５による締結力を向上させることができる。   Furthermore, in this embodiment, since the first to third oil passages 55 to 57 are provided in the stator fastening portion 25 separately from the bolt insertion holes 45 to 47, the rigidity of the stator fastening portion 25 can be improved. The fastening force by the fastening bolt 15 can be improved.

以上、本発明を実施するための形態について説明したが、本発明はこうした実施形態に何等限定されるものではなく、本発明の要旨を逸脱しない範囲内において、種々なる形態で実施し得ることは勿論である。   As mentioned above, although the form for implementing this invention was demonstrated, this invention is not limited to such embodiment at all, and it can implement with a various form in the range which does not deviate from the summary of this invention. Of course.

１２ 冷却パイプ、１５ 締結用ボルト、２１ ステータコア、２２ コイル、２３ ステータヨーク、２４ ステータティース、２５ ステータ締結部、３０ 第３コア部、３１ 第１コア部、３２ 第２コア部、３３ ヨーク部、３４ ティース部、３５ 第１締結部、３６ 第２締結部、３７ 第３締結部、４５，４６，４７ ボルト挿通空間、５５ 第１オイル通路、５６ 第２オイル通路、５７ 第３オイル通路。   12 cooling pipe, 15 fastening bolt, 21 stator core, 22 coil, 23 stator yoke, 24 stator teeth, 25 stator fastening portion, 30 third core portion, 31 first core portion, 32 second core portion, 33 yoke portion, 34 teeth portion, 35 first fastening portion, 36 second fastening portion, 37 third fastening portion, 45, 46, 47 bolt insertion space, 55 first oil passage, 56 second oil passage, 57 third oil passage.

Claims (2)

締結用部材を通すための挿通空間が形成された締結部がヨーク外周面より径方向外側へ突出して設けられ、ヨーク外周面上を液体冷媒が流れる回転電機のステータであって、
前記締結部は、互いにステータ軸方向に対向する第１及び第２締結部を含み、
第１締結部のステータ周方向一方側の端部とヨーク外周面との間に、液体冷媒を通すための第１冷媒通路が形成され、
第２締結部のステータ周方向他方側の端部とヨーク外周面との間に、第１冷媒通路とつながり、液体冷媒を通すための第２冷媒通路が形成され、
液体冷媒が第１及び第２冷媒通路を通ってヨーク外周面上を流れる、回転電機のステータ。 A fastening portion in which an insertion space for passing a fastening member is formed is provided to protrude radially outward from the outer peripheral surface of the yoke, and a stator of a rotating electrical machine in which liquid refrigerant flows on the outer peripheral surface of the yoke,
The fastening portion includes first and second fastening portions that face each other in the stator axial direction,
A first refrigerant passage for passing a liquid refrigerant is formed between the end of the first fastening portion on one side in the stator circumferential direction and the outer peripheral surface of the yoke,
Between the end of the second fastening portion on the other side in the circumferential direction of the stator and the outer peripheral surface of the yoke, a second refrigerant passage is formed which is connected to the first refrigerant passage and allows liquid refrigerant to pass through.
A stator for a rotating electrical machine in which liquid refrigerant flows on the outer peripheral surface of a yoke through first and second refrigerant passages. 請求項１に記載の回転電機のステータであって、
前記締結部は、ステータ軸方向において第１締結部と第２締結部との間に配置された第３締結部をさらに含み、
第３締結部に第３冷媒通路が形成され、第１冷媒通路と第２冷媒通路が第３冷媒通路を介してつながり、
第１〜第３冷媒通路は、前記挿通空間と連通しない通路であり、
液体冷媒が第１〜第３冷媒通路を通ってヨーク外周面上を流れる、回転電機のステータ。 A stator for a rotating electrical machine according to claim 1,
The fastening portion further includes a third fastening portion disposed between the first fastening portion and the second fastening portion in the stator axial direction,
A third refrigerant passage is formed in the third fastening portion, the first refrigerant passage and the second refrigerant passage are connected via the third refrigerant passage;
The first to third refrigerant passages are passages that do not communicate with the insertion space,
A stator of a rotating electrical machine in which liquid refrigerant flows on the outer peripheral surface of a yoke through first to third refrigerant passages.
JP2013165257A 2013-08-08 2013-08-08 Stator of dynamo-electric machine Pending JP2015035882A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110098696A (en) * 2018-01-30 2019-08-06 本田技研工业株式会社 Cooling structure of stator and rotating electric machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110098696A (en) * 2018-01-30 2019-08-06 本田技研工业株式会社 Cooling structure of stator and rotating electric machine
JP2019134547A (en) * 2018-01-30 2019-08-08 本田技研工業株式会社 Stator cooling structure and rotating electric machine

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