JP2010213412A - Rotating electric machine - Google Patents

Rotating electric machine Download PDF

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JP2010213412A
JP2010213412A JP2009055089A JP2009055089A JP2010213412A JP 2010213412 A JP2010213412 A JP 2010213412A JP 2009055089 A JP2009055089 A JP 2009055089A JP 2009055089 A JP2009055089 A JP 2009055089A JP 2010213412 A JP2010213412 A JP 2010213412A
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stator
housing
partition member
rotor
electrical machine
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Tamotsu Kawamura
保 河村
Hirobumi Shin
博文 新
Hisashi Murai
悠 村井
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotating electric machine having a simple configuration and preventing a cooling medium of a stator housing chamber from leaking to a rotor housing chamber. <P>SOLUTION: The rotating electric machine 10 includes: a stator 11, a freely rotatable rotor 12 arranged in the inner circumferential side of a stator 11 via an air gap, and a housing 13 for housing the stator 11 and the rotor 12. A partitioning wall member 17 is provided in the air gap S, for dividing the stator housing chamber 20 for housing the stator 11 from the rotor housing chamber 30 for housing the rotor 12. An inlet port 131a for introducing the cooling medium into the inside of the housing from the outside, and an outlet portion 131b for guiding the cooling medium to the outside from the inside of the housing are provided in the stator housing chamber 20. The partitioning wall member 17 has axial direction both ends which are liquid-tightly supported by the housing 13. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

本発明は、回転電機、特にステータを冷却する冷却構造を備えた回転電機に関する。   The present invention relates to a rotating electrical machine, and more particularly, to a rotating electrical machine having a cooling structure for cooling a stator.

従来、ステータを冷却する冷却構造を備えた回転電機として、例えば特許文献１に記載の回転電機が知られている。この回転電機２００は、図８及び図９に示すように、スロット２０１とティース２０２が内周面に交互に形成されたステータコア２０３にコイル２０４が装着されたステータ２０５と、ステータ２０５の内周部に配置され回転自在なロータ２０６と、ステータ２０５とロータ２０６を収容するハウジング２０７と、を備えて構成されている。   Conventionally, for example, a rotating electrical machine described in Patent Document 1 is known as a rotating electrical machine having a cooling structure for cooling a stator. As shown in FIGS. 8 and 9, the rotating electrical machine 200 includes a stator 205 in which a coil 204 is mounted on a stator core 203 in which slots 201 and teeth 202 are alternately formed on an inner peripheral surface, and an inner peripheral portion of the stator 205. And a rotatable rotor 206, a stator 205, and a housing 207 that accommodates the rotor 206.

また、ステータ２０５を冷却する構造として、スロット２０１の開口部付近にスロット２０１を閉塞するプレート２０８を配置するとともに、プレート２０８とステータコア２０３の内周側及び外周側に金型を配置しそこに樹脂を充填することでステータ２０５の両端とハウジング２０７の側壁部２１２、２１２間に隔壁２０９、２０９を形成し、ハウジング２０７内をステータ２０５を収容するステータ収容室２１０とロータ２０６を収容するロータ収容室２１１に分割している。
そして、ステータ収容室２１０に形成された導入口２１３からハウジング２０７内に冷却用の冷媒を導入し、導出口２１４から冷媒を外部に導出し、ステータ２０５を冷却することが記載されている。 Further, as a structure for cooling the stator 205, a plate 208 that closes the slot 201 is disposed in the vicinity of the opening of the slot 201, and molds are disposed on the inner peripheral side and the outer peripheral side of the plate 208 and the stator core 203, and resin is provided there. Partition walls 209 and 209 are formed between both ends of the stator 205 and the side walls 212 and 212 of the housing 207, and the housing 207 has a stator housing chamber 210 for housing the stator 205 and a rotor housing chamber for housing the rotor 206. It is divided into 211.
In addition, it is described that a cooling refrigerant is introduced into the housing 207 from the introduction port 213 formed in the stator housing chamber 210, the refrigerant is led out to the outside through the outlet port 214, and the stator 205 is cooled.

特開２００３−６１２８５号公報JP 2003-61285 A

しかしながら特許文献１に記載の回転電機２００は、ステータコア２０３を磁性板を積層した積層構造とした場合に、ステータ収容室２１０に導入された冷媒が積層間の隙間からロータ収容室２１１に漏れるおそれがあった。漏れた冷媒がロータ２０６に付着すると機械損失が増加し、また、ロータ収容室２１１から外部へ冷媒を排出しようとすると別途、排出機構が必要になるなどの問題があった。
また、プレート２０８の両端の隔壁２０９、２０９は、金型を用いて樹脂を充填して形成されるため構造が複雑であるとともに、製造工程も複雑であった。 However, in the rotating electrical machine 200 described in Patent Document 1, when the stator core 203 has a laminated structure in which magnetic plates are laminated, the refrigerant introduced into the stator accommodating chamber 210 may leak into the rotor accommodating chamber 211 from the gap between the laminates. there were. When the leaked refrigerant adheres to the rotor 206, the mechanical loss increases, and when the refrigerant is discharged from the rotor accommodating chamber 211 to the outside, a separate discharge mechanism is required.
Further, since the partition walls 209 and 209 at both ends of the plate 208 are formed by filling a resin using a mold, the structure is complicated and the manufacturing process is also complicated.

本発明は、上記した事情に鑑みてなされたもので、その目的は、簡易な構成でステータ収容室の冷媒がロータ収容室に漏れるのを防止することができる回転電機を提供することにある。   The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a rotating electrical machine that can prevent the refrigerant in the stator housing chamber from leaking into the rotor housing chamber with a simple configuration.

上記目的を達成するために、請求項１に記載の発明は、
スロット（例えば、後述の実施形態におけるスロット１１２）とティース（例えば、後述の実施形態におけるティース１１１）が内周面に交互に形成されたステータコア（例えば、後述の実施形態におけるステータコア１１０）にコイル（例えば、後述の実施形態におけるコイル１１４）が装着されたステータ（例えば、後述の実施形態におけるステータ１１）と、前記ステータの内周側にエアギャップ（例えば、後述の実施形態におけるエアギャップＳ）を介して配置され回転自在なロータ（例えば、後述の実施形態におけるロータ１２）と、前記ステータと前記ロータを収容するハウジング（例えば、後述の実施形態におけるハウジング１３）と、を備えた回転電機（例えば、後述の実施形態における回転電機１０、１０Ａ）であって、
前記エアギャップには、前記ステータを収容するステータ収容室（例えば、後述の実施形態におけるステータ収容室２０）と前記ロータを収容するロータ収容室（例えば、後述の実施形態におけるロータ収容室３０）を分割する隔壁部材（例えば、後述の実施形態における隔壁部材１７）が設けられ、
前記ステータ収容室には、外部からハウジング内部に冷媒を導入する導入口（例えば、後述の実施形態における導入口１３１ａ）と、前記ハウジング内部から外部に冷媒を導出する導出口（例えば、後述の実施形態における導出口１３１ｂ）が設けられ、
前記隔壁部材は、軸方向両端部が前記ハウジングに液密に支持される、
ことを特徴とする。 In order to achieve the above object, the invention described in claim 1
The coil ( For example, a stator (for example, a stator 11 in the later-described embodiment) on which a coil 114 in the later-described embodiment is mounted, and an air gap (for example, an air gap S in the later-described embodiment) on the inner peripheral side of the stator. A rotating electrical machine (for example, a rotor 12 in an embodiment described later) and a housing (for example, a housing 13 in an embodiment described later) that accommodates the stator and the rotor. , Rotating electric machines 10 and 10A) in embodiments described later,
The air gap includes a stator accommodating chamber (for example, a stator accommodating chamber 20 in an embodiment described later) and a rotor accommodating chamber (for example, a rotor accommodating chamber 30 in an embodiment described later) for accommodating the rotor. A partition member to be divided (for example, a partition member 17 in an embodiment described later) is provided,
The stator housing chamber has an inlet for introducing refrigerant into the housing from the outside (for example, an inlet 131a in an embodiment described later) and an outlet for discharging refrigerant from the inside of the housing to the outside (for example, implementation described later). The outlet 131b) in the form is provided,
The partition member is supported in a liquid-tight manner at both ends in the axial direction by the housing.
It is characterized by that.

請求項２に記載の発明は、請求項１に記載の発明の構成に加えて、
前記ハウジングには、前記隔壁部材の軸方向両側に、且つ、内径側に前記隔壁部材を支持する環状支持部（例えば、後述の実施形態における環状支持部１３３）が設けられ、
前記隔壁部材の内周面が、シール部材（例えば、後述の実施形態におけるＯリング１８）を介して前記環状支持部に支持される、
ことを特徴とする。 In addition to the configuration of the invention described in claim 1, the invention described in claim 2
The housing is provided with an annular support portion (for example, an annular support portion 133 in an embodiment described later) that supports the partition member on both sides in the axial direction of the partition member and on the inner diameter side.
The inner peripheral surface of the partition member is supported by the annular support portion via a seal member (for example, an O-ring 18 in an embodiment described later).
It is characterized by that.

請求項３に記載の発明は、請求項１又は２に記載の発明の構成に加えて、
前記隔壁部材は、非磁性及び非導電性材料にて形成されている、
ことを特徴とする。 In addition to the configuration of the invention described in claim 1 or 2, the invention described in claim 3
The partition member is formed of a nonmagnetic and nonconductive material,
It is characterized by that.

請求項４に記載の発明は、請求項３に記載の発明の構成に加えて、
前記隔壁部材は、繊維を捲回して形成された繊維強化プラスチックからなる、
ことを特徴とする。 In addition to the configuration of the invention described in claim 3, the invention described in claim 4
The partition member is made of fiber reinforced plastic formed by winding fibers,
It is characterized by that.

請求項５に記載の発明は、請求項４に記載の発明の構成に加えて、
前記繊維の巻回方向が、前記隔壁部材の中心線に対し傾斜する、
ことを特徴とする。 In addition to the structure of the invention described in claim 4, the invention described in claim 5
The winding direction of the fiber is inclined with respect to the center line of the partition member,
It is characterized by that.

請求項６に記載の発明は、請求項１〜５のいずれかに記載の発明の構成に加えて、
前記隔壁部材は、前記ステータのティース先端面（例えば、後述の実施形態におけるティース先端面１１１ａ）にインロー嵌合する、
ことを特徴とする。 In addition to the structure of the invention in any one of Claims 1-5, the invention of Claim 6 is
The partition member is inlay-fitted to a tooth tip surface of the stator (for example, a tooth tip surface 111a in an embodiment described later).
It is characterized by that.

請求項１の発明によれば、ステータ収容室とロータ収容室を分割する隔壁が１つの円筒状の隔壁部材から構成され、隔壁部材はハウジングに液密に支持されるため簡易な構成で、ステータ収容室の冷媒がロータ収容室に漏れるのを防止することができる。これにより、冷媒がロータに付着することによる機械損失を低減することができ効率を向上させることができる。また、ロータ収容室から冷媒を外部へ排出する排出機構を設ける必要がないので回転電機を小型化することができる。
さらにステータ収容室とロータ収容室を分割する隔壁が１つの隔壁部材から構成されるので、冷媒による径方向外側からの圧力に対して強度を確保することができる。これにより、ステータ収容室の圧力が高くなっても隔壁部材の破壊や変形によるロータ収容室への冷媒漏れを回避することができるため、冷媒流量を増やして冷却性能を向上させることができる。 According to the first aspect of the present invention, the partition that divides the stator housing chamber and the rotor housing chamber is constituted by one cylindrical partition member, and the partition member is supported in a liquid-tight manner by the housing. The refrigerant in the storage chamber can be prevented from leaking into the rotor storage chamber. Thereby, the mechanical loss by a refrigerant | coolant adhering to a rotor can be reduced, and efficiency can be improved. Further, since there is no need to provide a discharge mechanism for discharging the refrigerant from the rotor housing chamber to the outside, the rotating electrical machine can be reduced in size.
Furthermore, since the partition which divides | segments a stator storage chamber and a rotor storage chamber is comprised from one partition member, intensity | strength can be ensured with respect to the pressure from the radial direction outer side by a refrigerant | coolant. Thereby, even if the pressure in the stator accommodating chamber increases, the refrigerant leakage to the rotor accommodating chamber due to the breakage or deformation of the partition member can be avoided, so that the refrigerant flow rate can be increased and the cooling performance can be improved.

請求項２の発明によれば、ステータ収容室に冷媒が供給されると冷媒により隔壁部材の外周面に液圧が作用するが、シール部材は隔壁部材の内周面と当接するので、冷媒の液圧がシール部材をつぶす方向に作用するため、シール性を向上させることができる。   According to the second aspect of the present invention, when a refrigerant is supplied to the stator housing chamber, a hydraulic pressure acts on the outer peripheral surface of the partition member by the refrigerant, but the seal member contacts the inner peripheral surface of the partition member. Since the hydraulic pressure acts in the direction of crushing the seal member, the sealing performance can be improved.

請求項３の発明によれば、隔壁部材は、非磁性及び非導電性材料にて形成されているので、隔壁部材をステータとロータとの間に配置しても回転磁界の阻害及び渦電流に基づく発熱を防止することができる。   According to the invention of claim 3, since the partition member is formed of a non-magnetic and non-conductive material, even if the partition member is disposed between the stator and the rotor, the rotating magnetic field is inhibited and eddy current is prevented. Heat generation based on it can be prevented.

請求項４の発明によれば、繊維を捲回して形成された繊維強化プラスチックからなるので、隔壁部材を高強度にすることができる。これにより冷媒流量を増やして冷却性能を向上させることができる。   According to the fourth aspect of the present invention, the partition member can be made high in strength because it is made of fiber reinforced plastic formed by winding fibers. As a result, the coolant flow rate can be increased to improve the cooling performance.

請求項５の発明によれば、繊維の巻線方向を隔壁部材の中心線に対して傾斜させることでより隔壁部材の強度を向上させることができる。   According to invention of Claim 5, the intensity | strength of a partition member can be improved more by making the winding direction of a fiber incline with respect to the centerline of a partition member.

請求項６の発明によれば、隔壁部材をティース先端面にインロー嵌合することにより、隔壁部材の一部が外径側に変形しようとしてもティース先端面で支持されるので、ステータ収容室の圧力が高くなっても隔壁部材の破壊や変形によるロータ収容室への冷媒漏れを回避することができるため、冷媒流量を増やして冷却性能を向上させることができる。   According to the sixth aspect of the present invention, since the partition wall member is supported by the tooth front end surface even if the partition wall member is deformed to the outer diameter side by fitting the partition wall member into the tooth front end surface, Even if the pressure is increased, it is possible to avoid refrigerant leakage to the rotor housing chamber due to the breakage or deformation of the partition member, so that the refrigerant flow rate can be increased to improve the cooling performance.

本発明に係る回転電機の一実施形態の軸方向断面図であり、図２のＩ−Ｉ線断面図である。It is an axial sectional view of an embodiment of a rotating electrical machine according to the present invention, and is a sectional view taken along line II in FIG. 図１に示す回転電機の軸直交方向断面図である。FIG. 2 is a cross-sectional view in the direction perpendicular to the axis of the rotating electrical machine shown in FIG. 1. 図１に示す回転電機における隔壁部材の変形モードを説明する軸方向断面図である。It is an axial sectional view explaining the deformation mode of the partition member in the rotating electrical machine shown in FIG. 耐圧試験に用いた歪ゲージを取り付けた隔壁部材の斜視図である。It is a perspective view of the partition member which attached the strain gauge used for the pressure test. 耐圧試験装置を示す図であり、（ａ）は耐圧試験装置の軸直交方向断面図であり、（ｂ）は（ａ）のＢ−Ｂ線断面図である。It is a figure which shows a pressure | voltage resistant test apparatus, (a) is an axial orthogonal direction sectional view of a pressure | voltage resistant test apparatus, (b) is the BB sectional drawing of (a). 耐圧試験装置における隔壁部材の変形を示す図である。It is a figure which shows the deformation | transformation of the partition member in a pressure | voltage resistant test apparatus. 変形例に係る回転電機の軸直交方向断面図である。It is an axial orthogonal direction sectional view of the rotary electric machine concerning a modification. 特許文献１に記載の回転電機の軸方向断面図である。3 is an axial sectional view of a rotating electrical machine described in Patent Document 1. FIG. 特許文献１に記載の回転電機のステータの軸直交方向の部分断面図である。FIG. 6 is a partial cross-sectional view in a direction perpendicular to the axis of a stator of a rotating electrical machine described in Patent Document 1.

以下、本発明に係る回転電機の各実施形態について、添付図面に基づいて詳細に説明する。   Hereinafter, each embodiment of the rotating electrical machine according to the present invention will be described in detail with reference to the accompanying drawings.

本実施の形態による回転電機１０は、例えば図１及び図２に示すように、ステータ１１と、ステータ１１の内周側にエアギャップＳを介して対向配置されたロータ１２と、ステータ１１とロータ１２を収容するハウジング１３と、を備えて構成されている。   The rotating electrical machine 10 according to the present embodiment includes, for example, as shown in FIGS. 1 and 2, a stator 11, a rotor 12 that is disposed to face the inner peripheral side of the stator 11 via an air gap S, and the stator 11 and the rotor. And a housing 13 that accommodates the housing 12.

ハウジング１３は、円筒状の円筒壁部１３１と、円筒壁部１３１の両側をＯリング１４、１４を介して液密に閉塞した側壁部１３２、１３２と、側壁部１３２、１３２の軸方向内側に接合され円筒壁部１３１より小径で軸方向長さの短い環状支持部１３３と、から構成されている。円筒壁部１３１には、外部からハウジング内部へ冷媒を導入する導入口１３１ａが穿設されるとともにハウジング内部から外部へ冷媒を導出する導出口１３１ｂが穿設されている。そして、円筒壁部１３１の内周面には、ステータ１１が固定されている。   The housing 13 includes a cylindrical cylindrical wall portion 131, side wall portions 132 and 132 in which both sides of the cylindrical wall portion 131 are liquid-tightly closed via O-rings 14 and 14, and axially inner sides of the side wall portions 132 and 132. An annular support portion 133 that is joined and has a smaller diameter than the cylindrical wall portion 131 and a shorter axial length is formed. The cylindrical wall 131 is provided with an introduction port 131a for introducing a refrigerant from the outside to the inside of the housing and an outlet port 131b for drawing the refrigerant from the inside of the housing to the outside. The stator 11 is fixed to the inner peripheral surface of the cylindrical wall 131.

ステータ１１は、内径側に所定の間隔で突出する複数のティース１１１が設けられてティース１１１とスロット１１２が周方向に交互に形成されたステータコア１１０と、ステータコア１１０の各ティース１１１に巻回されたコイル１１４とから構成されている。ステータコア１１０は、複数層の電磁鋼板が積層されて構成されている。   The stator 11 is wound around each tooth 111 of the stator core 110 and a stator core 110 in which a plurality of teeth 111 protruding at a predetermined interval are provided on the inner diameter side, and the teeth 111 and the slots 112 are alternately formed in the circumferential direction. The coil 114 is configured. The stator core 110 is configured by laminating a plurality of layers of electromagnetic steel plates.

ロータ１２は、回転軸１５と一体に回転可能なロータコア１２０と、ロータコア１２０内に周方向に等間隔に配置された不図示の永久磁石とから構成されている。回転軸１５はハウジング１３の側壁部１３２、１３２に軸受１６、１６を介して回転自在に支持されており、ロータコア１２０はステータコア１１０により与えられる回転磁束に対して反力を生じて回転軸１５と一体に回転可能となっている。   The rotor 12 includes a rotor core 120 that can rotate integrally with the rotary shaft 15, and permanent magnets (not shown) that are arranged in the rotor core 120 at equal intervals in the circumferential direction. The rotating shaft 15 is rotatably supported on the side wall portions 132 and 132 of the housing 13 via bearings 16 and 16, and the rotor core 120 generates a reaction force against the rotating magnetic flux applied by the stator core 110 and It can rotate as a unit.

ここで、本実施形態の回転電機１０は、ステータ１１の内周面とロータ１２の外周面間に形成されたエアギャップＳに１つの円筒状の隔壁部材１７が設けられ、隔壁部材１７の両端部の内周面がＯリング１８、１８を介してハウジング１３の環状支持部１３３、１３３に支持されている。隔壁部材１７は、非磁性及び非導電性材料、例えば、繊維強化プラスチック（ＦＲＰ）、樹脂、セラミックなどから構成され、軸方向で対向するハウジング１３の側壁部１３２、１３２間距離と略等しい軸方向長さを有し、厚さ（径方向長さ）は所定の強度を確保できるようにエアギャップＳより短い厚さに設定されている。なお、繊維強化プラスチックにより隔壁部材１７を形成する場合には、繊維の巻角度をその中心線に対し所定の角度だけ傾斜させることにより剛性を向上させることができる。   Here, in the rotating electrical machine 10 according to the present embodiment, one cylindrical partition member 17 is provided in the air gap S formed between the inner peripheral surface of the stator 11 and the outer peripheral surface of the rotor 12. The inner peripheral surface of each part is supported by the annular support parts 133 and 133 of the housing 13 via O-rings 18 and 18. The partition member 17 is made of a non-magnetic and non-conductive material, for example, fiber reinforced plastic (FRP), resin, ceramic, and the like, and has an axial direction substantially equal to the distance between the side wall portions 132 and 132 of the housing 13 facing in the axial direction It has a length, and the thickness (the length in the radial direction) is set to be shorter than the air gap S so as to ensure a predetermined strength. In addition, when the partition member 17 is formed of fiber reinforced plastic, the rigidity can be improved by inclining the winding angle of the fiber by a predetermined angle with respect to the center line.

また、隔壁部材１７の外周面はティース１１１の内周面であるティース先端面１１１ａとインロー嵌合している。このように構成された隔壁部材１７は、ステータ１１を収容するステータ収容室２０とロータ１２を収容するロータ収容室３０とにハウジング１３内を分割する隔壁として機能し、隔壁部材１７の内周面と環状支持部１３３、１３３間に設けられたＯリング１８、１８によりステータ収容室２０がロータ収容室３０から液密に隔離されている。   In addition, the outer peripheral surface of the partition member 17 is in-fit with a tooth front end surface 111 a that is an inner peripheral surface of the tooth 111. The partition member 17 configured as described above functions as a partition that divides the interior of the housing 13 into a stator housing chamber 20 that houses the stator 11 and a rotor housing chamber 30 that houses the rotor 12. The stator housing chamber 20 is liquid-tightly isolated from the rotor housing chamber 30 by O-rings 18 and 18 provided between the annular support portions 133 and 133.

そして、ハウジング１３の円筒壁部１３１に形成された導入口１３１ａから絶縁性の冷媒が供給され、ステータ収容室２０が冷媒で充填されることによりステータ１１が冷却される。このとき円筒状の隔壁部材１７の変形モードは、図３に示すように両端支持の分布荷重曲げとなる。   Then, an insulating refrigerant is supplied from an inlet 131a formed in the cylindrical wall 131 of the housing 13, and the stator 11 is cooled by filling the stator housing chamber 20 with the refrigerant. At this time, the deformation mode of the cylindrical partition member 17 is distributed load bending with both ends supported as shown in FIG.

以上、説明したように本実施形態の回転電機１０によれば、ステータ収容室２０とロータ収容室３０を分割する隔壁が１つの円筒状の隔壁部材１７から構成され、隔壁部材１７はハウジング１３に液密に支持されるため簡易な構成で、ステータ収容室２０の冷媒がロータ収容室３０に漏れるのを防止することができる。これにより、冷媒がロータ１２に付着することによる機械損失を低減することができ効率を向上させることができる。また、ロータ収容室３０から冷媒を外部へ排出する排出機構を設ける必要がないので回転電機１０を小型化することができる。
さらにステータ収容室２０とロータ収容室３０を分割する隔壁が１つの隔壁部材１７から構成されるので、冷媒による径方向外側からの圧力に対して強度を確保することができる。これにより、ステータ収容室２０の圧力が高くなっても隔壁の破壊や変形によるロータ収容室３０への冷媒漏れを回避することができるため、冷媒流量を増やして冷却性能を向上させることができる。 As described above, according to the rotating electrical machine 10 of the present embodiment, the partition wall that divides the stator housing chamber 20 and the rotor housing chamber 30 is composed of one cylindrical partition wall member 17, and the partition wall member 17 is attached to the housing 13. Since it is supported in a liquid-tight manner, the refrigerant in the stator housing chamber 20 can be prevented from leaking into the rotor housing chamber 30 with a simple configuration. Thereby, the mechanical loss by a refrigerant | coolant adhering to the rotor 12 can be reduced, and efficiency can be improved. Further, since there is no need to provide a discharge mechanism for discharging the refrigerant from the rotor housing chamber 30 to the outside, the rotating electrical machine 10 can be reduced in size.
Furthermore, since the partition which divides the stator storage chamber 20 and the rotor storage chamber 30 is comprised from the one partition member 17, intensity | strength can be ensured with respect to the pressure from the radial direction outer side by a refrigerant | coolant. Thereby, even if the pressure in the stator accommodating chamber 20 increases, the refrigerant leakage to the rotor accommodating chamber 30 due to the breakage or deformation of the partition wall can be avoided, so that the refrigerant flow rate can be increased and the cooling performance can be improved.

また、本実施形態の回転電機１０によれば、ステータ収容室２０に冷媒が供給されると冷媒により隔壁部材１７の外周面に液圧が作用するが、Ｏリング１８、１８が隔壁部材１７の内周面と当接するので、冷媒の液圧がＯリング１８、１８をつぶす方向に作用するため、シール性を向上させることができる。   Further, according to the rotating electrical machine 10 of the present embodiment, when refrigerant is supplied to the stator housing chamber 20, hydraulic pressure acts on the outer peripheral surface of the partition wall member 17 by the coolant, but the O-rings 18 and 18 are connected to the partition wall member 17. Since it abuts on the inner peripheral surface, the fluid pressure of the refrigerant acts in the direction of crushing the O-rings 18 and 18, so that the sealing performance can be improved.

また、本実施形態の回転電機１０によれば、非磁性及び非導電性材料にて形成されているので、隔壁部材１７をステータ１１とロータ１２との間に配置しても回転磁界の阻害及び渦電流に基づく発熱を防止することができる。   Further, according to the rotating electrical machine 10 of the present embodiment, since it is formed of a non-magnetic and non-conductive material, even if the partition member 17 is disposed between the stator 11 and the rotor 12, the rotating magnetic field is inhibited and Heat generation based on eddy current can be prevented.

また、本実施形態の回転電機１０によれば、繊維を捲回して形成された繊維強化プラスチックからなるので、隔壁部材１７を高強度にすることができる。これにより冷媒流量を増やして冷却性能を向上させることができる。   Moreover, according to the rotary electric machine 10 of this embodiment, since it consists of the fiber reinforced plastic formed by winding a fiber, the partition member 17 can be made high intensity | strength. As a result, the coolant flow rate can be increased to improve the cooling performance.

また、本実施形態の回転電機１０によれば、繊維の巻線方向を隔壁部材１７の中心線に対して傾斜させることでより隔壁部材１７の強度を向上させることができる。   Further, according to the rotating electrical machine 10 of the present embodiment, the strength of the partition member 17 can be improved by inclining the winding direction of the fiber with respect to the center line of the partition member 17.

次に、図４〜図６を参照して円筒状の隔壁部材の耐圧試験について説明する。
図４に示すように、試験用サンプルとして円筒状の隔壁部材Ｓａを用意し、隔壁部材Ｓａの軸方向両側に周方向に等間隔で４つの歪ゲージ（Ａ〜Ｄ，Ｅ〜Ｈ）を貼り付けた。試験装置４０は、隔壁部材Ｓａより大径の円筒部４１と該円筒部４１の内周面から突出し周方向等間隔に設けられた突出部４２を有する円筒状部材４３と、軸方向両端に設けられ互いに対向する軸部材４４、４４と、を備え、内部に冷媒を供給可能に構成されている。そして、図５（ａ）及び（ｂ）に示すように試験装置４０に隔壁部材Ｓａを装着し、隔壁部材Ｓａの外周面をティースに相当する突出部４２にインロー嵌合させるとともに、隔壁部材Ｓａの内周面をＯリング４５、４５により液密にして軸方向両端の軸部材４４、４４に固定した。このように隔壁部材Ｓａを試験装置４０に装着し、隔壁部材Ｓａの外周側の空間に冷媒を供給し、隔壁部材Ｓａの歪を調べた。 Next, a pressure resistance test of the cylindrical partition member will be described with reference to FIGS.
As shown in FIG. 4, a cylindrical partition member Sa is prepared as a test sample, and four strain gauges (A to D, E to H) are attached at equal intervals in the circumferential direction on both sides in the axial direction of the partition member Sa. I attached. The test apparatus 40 includes a cylindrical member 43 having a cylindrical portion 41 having a diameter larger than that of the partition wall member Sa, protruding portions 42 protruding from the inner peripheral surface of the cylindrical portion 41 and provided at equal intervals in the circumferential direction, and provided at both axial ends. The shaft members 44 and 44 are opposed to each other, and are configured to be able to supply a refrigerant therein. Then, as shown in FIGS. 5A and 5B, the partition member Sa is attached to the test apparatus 40, and the outer peripheral surface of the partition member Sa is fitted into the protruding portion 42 corresponding to the teeth, and the partition member Sa. The inner peripheral surface of each was made fluid-tight by O-rings 45 and 45 and fixed to shaft members 44 and 44 at both axial ends. Thus, the partition member Sa was mounted on the test apparatus 40, the refrigerant was supplied to the space on the outer peripheral side of the partition member Sa, and the strain of the partition member Sa was examined.

図６に耐圧試験の結果を示す。
図６に示すように、油圧がかかっていないときには略真円断面（図６（ａ）参照）を有する隔壁部材Ｓａが、油圧を上げていくことで次第に変形する過程が観測された。油圧が比較的低い状態では、図６（ｂ）に示すように４箇所の歪ゲージには全て圧縮応力が作用しており、次第に油圧を上げていくと、図６（ｃ）に示すように一箇所で引張応力が作用した。そして、さらに油圧を上げることで図６（ｄ）に示すように、図６（ｃ）における引張応力発生部から隔壁部材Ｓａが破損した。
この耐圧試験結果から、隔壁部材Ｓａに外圧を作用させると、ある圧力で１ヶ所に引張応力が発生し、さらに外圧を上げることで引張応力発生部から隔壁部材Ｓａが破損することがわかった。
なお、隔壁部材Ｓａの外周面を突出部４２にインロー嵌合させない場合についても同様の試験を行なったが、インロー嵌合させる場合に比べて低圧で隔壁部材Ｓａが破損することが確認できた。 FIG. 6 shows the results of the pressure resistance test.
As shown in FIG. 6, when the hydraulic pressure was not applied, a process in which the partition wall member Sa having a substantially perfect circular cross section (see FIG. 6A) gradually deformed by increasing the hydraulic pressure was observed. In a state where the hydraulic pressure is relatively low, compressive stress is applied to all four strain gauges as shown in FIG. 6 (b), and as the hydraulic pressure is gradually raised, as shown in FIG. 6 (c). Tensile stress was applied at one location. Further, as shown in FIG. 6 (d), the partition wall member Sa was damaged from the tensile stress generating portion in FIG. 6 (c) by further increasing the hydraulic pressure.
From this pressure resistance test result, it was found that when an external pressure is applied to the partition wall member Sa, a tensile stress is generated at one location at a certain pressure, and the partition wall Sa is damaged from the tensile stress generation portion by further increasing the external pressure.
The same test was performed for the case where the outer peripheral surface of the partition wall member Sa was not fitted with the spigot portion 42, but it was confirmed that the partition wall member Sa was damaged at a lower pressure than when the spigot fitting was performed.

ここで、本実施形態の回転電機１０は、隔壁部材１７の外周面がティース先端面１１１ａにインロー嵌合するため、隔壁部材１７の一部に引張応力が作用し外径側に変形しようとしても隔壁部材１７がティース先端面１１１ａに支持される。従って、ステータ収容室２０の圧力が高くなっても隔壁部材１７の外径方向への変形を均等に抑止でき、隔壁部材１７の破壊や変形によるロータ収容室３０への冷媒漏れを回避することができるため、冷媒流量を増やして冷却性能を向上させることができる。   Here, in the rotating electrical machine 10 of the present embodiment, the outer peripheral surface of the partition wall member 17 is inlay-fitted with the tooth tip surface 111a, so that even if a tensile stress acts on a part of the partition wall member 17 and attempts to deform to the outer diameter side. The partition member 17 is supported by the tooth front end surface 111a. Therefore, even when the pressure in the stator housing chamber 20 is increased, deformation of the partition wall member 17 in the outer diameter direction can be uniformly suppressed, and refrigerant leakage to the rotor housing chamber 30 due to breakage or deformation of the partition wall member 17 can be avoided. Therefore, the cooling performance can be improved by increasing the refrigerant flow rate.

なお、本発明は、上記実施形態に例示したものに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において適宜変更可能である。   In addition, this invention is not limited to what was illustrated to the said embodiment, In the range which does not deviate from the summary of this invention, it can change suitably.

例えば、上記実施形態では隔壁部材１７をティース先端面１１１ａにインロー嵌合させたが、所定の液圧以下で使用するならば、隔壁部材１７をティース先端面１１１ａにインロー嵌合させる必要はなく、図７の変形例に係る回転電機１０Ａのように、隔壁部材１７の外周面とティース先端面１１１ａとの間に所定の隙間を設けてもよい。これにより、隔壁部材１７の外径寸法を厳密に管理する必要はなく隔壁部材１７の製造を容易にすることができる。   For example, in the above embodiment, the partition wall member 17 is fitted in the tooth tip surface 111a with an inlay, but if used at a predetermined hydraulic pressure or lower, the partition member 17 does not need to be fitted in the tooth tip surface 111a. A predetermined gap may be provided between the outer peripheral surface of the partition wall member 17 and the tooth front end surface 111a as in the rotating electrical machine 10A according to the modified example of FIG. Thereby, it is not necessary to strictly manage the outer diameter of the partition member 17, and the manufacture of the partition member 17 can be facilitated.

１０、１０Ａ 回転電機
１１ ステータ
１１０ ステータコア
１１１ ティース
１１１ａ ティース先端面
１１２ スロット
１１４ コイル
１２ ロータ
１３ ハウジング
１３１ａ 導入口
１３１ｂ 導出口
１３３ 環状支持部
１７ 隔壁部材
１８ Ｏリング（シール部材）
２０ ステータ収容室
３０ ロータ収容室
Ｓ エアギャップ DESCRIPTION OF SYMBOLS 10, 10A Rotating electrical machine 11 Stator 110 Stator core 111 Teeth 111a Teeth front end surface 112 Slot 114 Coil 12 Rotor 13 Housing 131a Inlet 131b Outlet 133 Annular support 17 Bulkhead member 18 O-ring (seal member)
20 Stator accommodating chamber 30 Rotor accommodating chamber S Air gap

Claims (6)

スロットとティースが内周面に交互に形成されたステータコアにコイルが装着されたステータと、前記ステータの内周側にエアギャップを介して配置され回転自在なロータと、前記ステータと前記ロータを収容するハウジングと、を備えた回転電機であって、
前記エアギャップには、前記ステータを収容するステータ収容室と前記ロータを収容するロータ収容室を分割する隔壁部材が設けられ、
前記ステータ収容室には、外部からハウジング内部に冷媒を導入する導入口と、前記ハウジング内部から外部に冷媒を導出する導出口が設けられ、
前記隔壁部材は、軸方向両端部が前記ハウジングに液密に支持される、
ことを特徴とする回転電機。 A stator in which a coil is mounted on a stator core in which slots and teeth are alternately formed on the inner peripheral surface, a rotatable rotor disposed on the inner peripheral side of the stator via an air gap, and the stator and the rotor are accommodated A rotating electrical machine having a housing
The air gap is provided with a partition member that divides a stator accommodating chamber that accommodates the stator and a rotor accommodating chamber that accommodates the rotor,
The stator accommodating chamber is provided with an introduction port for introducing a refrigerant into the housing from the outside, and an outlet port for deriving the refrigerant from the inside of the housing to the outside.
The partition member is supported in a liquid-tight manner at both ends in the axial direction by the housing.
Rotating electric machine characterized by that. 前記ハウジングには、前記隔壁部材の軸方向両側に、且つ、内径側に前記隔壁部材を支持する環状支持部が設けられ、
前記隔壁部材の内周面が、シール部材を介して前記環状支持部に支持される、
ことを特徴とする請求項１に記載の回転電機。 The housing is provided with annular support portions for supporting the partition member on both sides in the axial direction of the partition member and on the inner diameter side,
An inner peripheral surface of the partition member is supported by the annular support portion via a seal member.
The rotating electrical machine according to claim 1. 前記隔壁部材は、非磁性及び非導電性材料にて形成されている、
ことを特徴とする請求項１又は２に記載の回転電機。 The partition member is formed of a nonmagnetic and nonconductive material,
The rotating electrical machine according to claim 1 or 2, characterized in that 前記隔壁部材は、繊維を捲回して形成された繊維強化プラスチックからなる、
ことを特徴とする請求項３に記載の回転電機。 The partition member is made of fiber reinforced plastic formed by winding fibers,
The rotating electrical machine according to claim 3. 前記繊維の巻回方向が、前記隔壁部材の中心線に対し傾斜する、
ことを特徴とする請求項４に記載の回転電機。 The winding direction of the fiber is inclined with respect to the center line of the partition member,
The rotating electrical machine according to claim 4. 前記隔壁部材は、前記ステータのティース先端面にインロー嵌合する、
ことを特徴とする請求項１〜５のいずれかに記載の回転電機。 The partition member is inlay-fitted to the teeth tip surface of the stator,
The rotating electrical machine according to any one of claims 1 to 5, wherein
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JP2022027230A (en) * 2020-07-31 2022-02-10 株式会社豊田自動織機 Rotary electric machine
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