JP2021131126A - Liquid cooling device and rotary electric machine including liquid cooling device - Google Patents

Liquid cooling device and rotary electric machine including liquid cooling device Download PDF

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JP2021131126A
JP2021131126A JP2020026810A JP2020026810A JP2021131126A JP 2021131126 A JP2021131126 A JP 2021131126A JP 2020026810 A JP2020026810 A JP 2020026810A JP 2020026810 A JP2020026810 A JP 2020026810A JP 2021131126 A JP2021131126 A JP 2021131126A
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water channel
nipple
press
liquid cooling
cooling device
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JP7433078B2 (en
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将大 金丸
Masahiro Kanamaru
将大 金丸
潤 田原
Jun Tawara
潤 田原
光範 石崎
Mitsunori Ishizaki
光範 石崎
達也 深瀬
Tatsuya Fukase
達也 深瀬
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Abstract

To easily fit two members composed of a nipple and a water channel portion by improving fixing force even when a temperature is increased or decreased compared to that at the time of fitting.SOLUTION: A liquid cooling device includes a water channel connection portion 11 disposed on a water channel portion 1 and connecting a water channel and the outside, and a press-fitting portion 100 disposed on the water channel connection portion 11 to press-fit a nipple 3. A thermal setting portion 110 is disposed on the water channel connection portion 11, the nipple 3, and a fixing member 2 and the water channel portion 1 are successively disposed from a press-fitting central axis of the nipple 3 toward a radial direction on the thermal fixing portion 110. A thermal expansion coefficient of the nipple 3 is smaller than a thermal expansion coefficient of the water channel portion 1, and a thermal expansion coefficient of the fixing member 2 is larger than the thermal expansion coefficient of the water channel portion 1.SELECTED DRAWING: Figure 2

Description

本願は、液冷装置及び液冷装置を備えた回転電機に関するものである。 The present application relates to a liquid cooling device and a rotary electric machine provided with the liquid cooling device.

従来より、液冷装置の異なる種類の２つの金属部材で構成される配管継ぎ手の嵌合部において、環境温度及び運転温度の温度変化に伴う熱膨張率の差によって、２つの部材のはめ合いが緩み、固定力が低下するという問題点があった。
従来の継ぎ手構造では、２つの管を長手方向に接続する管継手において、２つの管の一端側をねじで結合し、他端側に２つの管よりも熱膨張率の大きい材料からなる第３の管を設け、２つの管の間に第３の管を挟持して、ねじを締め込むことにより２つの管と第３の管の両シール面を締着するものがあった。 Conventionally, in the fitting part of a pipe joint composed of two metal members of different types of a liquid cooling device, the fitting of the two members has been caused by the difference in the coefficient of thermal expansion due to the temperature change of the environmental temperature and the operating temperature. There was a problem that it loosened and the fixing force decreased.
In the conventional joint structure, in a pipe joint connecting two pipes in the longitudinal direction, one end side of the two pipes is connected with a screw, and the other end side is made of a material having a larger thermal expansion rate than the two pipes. In some cases, a third pipe was sandwiched between the two pipes, and the sealing surfaces of the two pipes and the third pipe were fastened by tightening the screws.

２つの管の一端側にねじを設け、他端側に２つの管よりも熱膨張率の大きい材料からなる第３の管を設けて、ねじを締め込むことにより、熱膨張率の大きい材料の熱膨張によって２つの管と第３の管の両シール面を押し付ける力が発生し、また２つの管の一端側に設けたねじの締付け力との協働によって、２つの管の接合部を確実にしている（特許文献１参照）。 A screw is provided on one end side of the two pipes, and a third pipe made of a material having a coefficient of thermal expansion larger than that of the two pipes is provided on the other end side. Due to thermal expansion, a force is generated that presses both sealing surfaces of the two pipes and the third pipe, and the joint between the two pipes is secured by the cooperation with the tightening force of the screw provided on one end side of the two pipes. (See Patent Document 1).

特開２００９−１５６３８０号公報JP-A-2009-156380

上記特許文献１に示された嵌合構造では、熱膨張により管の長手方向に押し付け力を発生させ締結強度を高めているため、環境温度が製造時よりも低温になった場合、熱膨張率の大きい第３の管は収縮し押しつける力を発揮することができない。そのため、例えば車載用の液冷装置において、寒冷地での低温からエンジンルーム内の高温に至るまで激しい温度変化に耐える構造と信頼性が求められる場合、嵌合部の強度を維持し、更には水路部におけるシール性を発揮することができない。
さらに、嵌合部構造としてねじ部を使用すると、ねじ止めする工程とねじを巻く量を管理する必要があり、嵌合に手間がかかり、生産性が低下するという問題点がある。 In the fitting structure shown in Patent Document 1, a pressing force is generated in the longitudinal direction of the pipe by thermal expansion to increase the fastening strength. Therefore, when the environmental temperature becomes lower than that at the time of manufacture, the coefficient of thermal expansion The third tube with a large size cannot exert the force of contracting and pressing. Therefore, for example, in an in-vehicle liquid cooling device, when a structure and reliability that can withstand a severe temperature change from a low temperature in a cold region to a high temperature in an engine room are required, the strength of the fitting portion is maintained, and further. It is not possible to exhibit the sealing property in the water channel.
Further, when the screw portion is used as the fitting portion structure, it is necessary to control the screwing process and the amount of winding the screw, which causes a problem that the fitting takes time and labor and the productivity is lowered.

本願は、上記のような課題を解決するための技術を開示するものであり、環境温度が嵌合時よりも高温になり、あるいは低温になっても固定力を高め、ニップルと水路部からなる２つの部材を容易に嵌合することのできる液冷装置及び液冷装置を備えた回転電機を得ることを目的としている。 The present application discloses a technique for solving the above-mentioned problems, and comprises a nipple and a water channel portion, which increases the fixing force even when the environmental temperature becomes higher or lower than that at the time of fitting. It is an object of the present invention to obtain a rotary electric machine provided with a liquid cooling device and a liquid cooling device capable of easily fitting two members.

本願に開示される液冷装置は、水路部と、前記水路部に接続されるニップルを備え、
前記水路部に設けられるとともに、水路と外部を接続する水路接続部と、前記水路接続部に設けられるとともに前記ニップルが圧入される圧入部を備えたものであって、
前記水路接続部に熱固定部を設け、前記熱固定部において前記ニップルの圧入中心軸から径方向に向かって前記ニップル、固定部材、前記水路部の順に配置するとともに、前記ニップルの熱膨張係数は前記水路部の熱膨張係数よりも小さく、前記固定部材の熱膨張係数は前記水路部の熱膨張係数よりも大きいものである。 The liquid cooling device disclosed in the present application includes a water channel portion and a nipple connected to the water channel portion.
It is provided in the water channel portion and includes a water channel connecting portion for connecting the water channel and the outside, and a press-fitting portion provided in the water channel connecting portion and into which the nipple is press-fitted.
A heat fixing portion is provided in the water channel connecting portion, and the nipple, the fixing member, and the water channel portion are arranged in this order in the radial direction from the press-fitting center axis of the nipple in the heat fixing portion, and the coefficient of thermal expansion of the nipple is set. It is smaller than the coefficient of thermal expansion of the water channel portion, and the coefficient of thermal expansion of the fixing member is larger than the coefficient of thermal expansion of the water channel portion.

又本願に開示される別の液冷装置は、水路部と、前記水路部に接続されるニップルを備え、
前記水路部に設けられるとともに、水路と外部を接続する水路接続部と、前記水路接続部に設けられるとともに前記ニップルが圧入される圧入部を備えたものであって、
前記水路接続部に熱固定部を設け、前記熱固定部において前記ニップルの圧入中心軸から径方向に向かって前記ニップル、前記水路部、固定部材の順に配置するとともに、前記ニップルの熱膨張係数は前記固定部材の熱膨張係数よりも小さく、前記固定部材の熱膨張係数は前記水路部の熱膨張係数よりも小さいものである。 Another liquid cooling device disclosed in the present application includes a water channel portion and a nipple connected to the water channel portion.
It is provided in the water channel portion and includes a water channel connecting portion for connecting the water channel and the outside, and a press-fitting portion provided in the water channel connecting portion and into which the nipple is press-fitted.
A heat fixing portion is provided in the water channel connecting portion, and the nipple, the water channel portion, and the fixing member are arranged in this order in the radial direction from the press-fitting center axis of the nipple in the heat fixing portion, and the coefficient of thermal expansion of the nipple is set. It is smaller than the coefficient of thermal expansion of the fixing member, and the coefficient of thermal expansion of the fixing member is smaller than the coefficient of thermal expansion of the water channel portion.

本願に開示される液冷装置を備えた回転電機は、液冷装置における水路部と、電力変換回路部と制御回路部を備えた電力制御装置とが接するように配置されるものである。 The rotary electric machine provided with the liquid cooling device disclosed in the present application is arranged so that the water channel portion in the liquid cooling device and the power control device including the power conversion circuit unit and the control circuit unit are in contact with each other.

本願に開示される液冷装置及び液冷装置を備えた回転電機によれば、環境温度が嵌合時よりも高温になり、あるいは低温になっても固定力を高め、ニップルと水路部からなる２つの部材を容易に嵌合することができる。 According to the liquid cooling device and the rotary electric machine provided with the liquid cooling device disclosed in the present application, the fixing force is increased even when the environmental temperature becomes higher or lower than that at the time of fitting, and the nipple and the water channel portion are formed. The two members can be easily fitted.

実施の形態１による液冷装置を示す斜視図である。It is a perspective view which shows the liquid cooling apparatus according to Embodiment 1. FIG. 実施の形態１による液冷装置を示す側面断面図である。It is a side sectional view which shows the liquid cooling apparatus according to Embodiment 1. FIG. 実施の形態２による液冷装置を示す側面断面図である。It is a side sectional view which shows the liquid cooling apparatus according to Embodiment 2. FIG. 実施の形態３による液冷装置を示す側面断面図である。It is a side sectional view which shows the liquid cooling apparatus according to Embodiment 3. FIG. 図４におけるＧ−Ｇ線断面図である。FIG. 5 is a cross-sectional view taken along the line GG in FIG. 実施の形態４による液冷装置を示す熱固定部の圧入中心軸に対して垂直な断面図である。FIG. 5 is a cross-sectional view perpendicular to the press-fitting central axis of the heat fixing portion showing the liquid cooling device according to the fourth embodiment. 実施の形態５による液冷装置を示す熱固定部の圧入中心軸に対して垂直な断面図である。FIG. 5 is a cross-sectional view perpendicular to the press-fitting central axis of the heat fixing portion showing the liquid cooling device according to the fifth embodiment. 実施の形態６による液冷装置を示す熱固定部の圧入中心軸に対して垂直な断面図である。FIG. 5 is a cross-sectional view perpendicular to the press-fitting central axis of the heat fixing portion showing the liquid cooling device according to the sixth embodiment. 実施の形態６による液冷装置を示す熱固定部の圧入中心軸に対して垂直な断面図である。FIG. 5 is a cross-sectional view perpendicular to the press-fitting central axis of the heat fixing portion showing the liquid cooling device according to the sixth embodiment. 実施の形態７による液冷装置を示す側面断面図である。It is a side sectional view which shows the liquid cooling apparatus according to Embodiment 7. 実施の形態７による液冷装置を示す側面断面図である。It is a side sectional view which shows the liquid cooling apparatus according to Embodiment 7. 実施の形態８による回転電機を示す断面図である。It is sectional drawing which shows the rotary electric machine according to Embodiment 8. 実施の形態８による回転電機の冷却構造を示す側面断面図である。It is a side sectional view which shows the cooling structure of the rotary electric machine according to Embodiment 8. 実施の形態９による液冷装置を示す側面断面図である。It is a side sectional view which shows the liquid cooling apparatus according to Embodiment 9. FIG.

実施の形態１．
図１は実施の形態１による液冷装置を示す斜視図、図２は液冷装置を示す側面断面図である。図２に示すように、水路部１に水路と外部を接続する水路接続部１１が設けられ、水路接続部１１に圧入部１００と熱固定部１１０が設けられている。そして水路接続部１１の圧入部１００の穴径よりも大きい外径を持つニップル３が圧入されている。水路接続部１１の熱固定部１１０はニップル３と、水路部１と、固定部材２を有し、それぞれ異なる部材で構成される。 Embodiment 1.
FIG. 1 is a perspective view showing the liquid cooling device according to the first embodiment, and FIG. 2 is a side sectional view showing the liquid cooling device. As shown in FIG. 2, the water channel portion 1 is provided with a water channel connecting portion 11 for connecting the water channel and the outside, and the water channel connecting portion 11 is provided with a press-fitting portion 100 and a heat fixing portion 110. Then, a nipple 3 having an outer diameter larger than the hole diameter of the press-fitting portion 100 of the water channel connecting portion 11 is press-fitted. The heat fixing portion 110 of the water channel connecting portion 11 has a nipple 3, a water channel portion 1, and a fixing member 2, each of which is composed of different members.

ニップル３は円筒形状に構成されており、ニップル３の内部を冷却液が流れ、水路と外部との間で冷却液の流出入が行われる。ニップル３の圧入部端部には、ニップル３の径方向に広がるフランジ部３１が設けられている。ニップル３の圧入部端部と反対側の端部はテーパを備えた外部接続部３２が設けられ、図示しない外部の機器とつながるホースが外部接続部３２に接続される。図１において、曲げ部を有するニップル３が示されているが、この形状に限られることなく、外部の機器の位置あるいは液冷装置の構造によって、任意のニップル形状を取ることができる。水路と外部をつなぐため外部より水路へ貫通穴にて水路接続部１１が製作される。水路部１にニップル３を圧入する際、フランジ部３１を水路接続部１１側に押し込むことで圧入する。 The nipple 3 has a cylindrical shape, and the coolant flows inside the nipple 3, and the coolant flows in and out between the water channel and the outside. A flange portion 31 extending in the radial direction of the nipple 3 is provided at the end of the press-fitting portion of the nipple 3. An external connection portion 32 having a taper is provided at the end portion of the nipple 3 opposite to the press-fit portion end portion, and a hose connected to an external device (not shown) is connected to the external connection portion 32. Although the nipple 3 having a bent portion is shown in FIG. 1, the shape is not limited to this, and any nipple shape can be taken depending on the position of an external device or the structure of the liquid cooling device. In order to connect the waterway and the outside, the waterway connection portion 11 is manufactured from the outside through a through hole to the waterway. When the nipple 3 is press-fitted into the water channel portion 1, the flange portion 31 is press-fitted into the water channel connection portion 11 side.

熱固定部１１０において、圧入中心軸に垂直な径方向に異なる材質の部材を配置することを考える。例えば３つの異なる部材で構成され、圧入中心軸から近い順に部材Ａ、部材Ｂ、部材Ｃとし、それぞれの熱膨張係数をα１、α２、α３、ヤング率をＥ１、Ｅ２、Ｅ３とする。このとき大小関係をα１＜α３かつα３＜α２かつＥ２＜Ｅ３とする。
図２の構成では、部材Ａはニップル３、部材Ｂは固定部材２、部材Ｃは水路部１となる。熱固定部１１０においてニップル３、固定部材２、水路部１を備え、熱膨張係数が水路部１より小さいニップル３と、熱膨張係数が水路部１より大きい固定部材２と、ヤング率が水路部１より小さい固定部材２によって構成されることとなり、熱固定部１１０においてニップル３の圧入中心軸から径方向に向かってニップル３、固定部材２、水路部１の順で配置されることとなる。 Consider arranging members made of different materials in the radial direction perpendicular to the press-fitting center axis in the heat fixing portion 110. For example, it is composed of three different members, with members A, B, and C in order from the press-fitting center axis, with the respective thermal expansion coefficients α 1 , α 2 , α 3 , and Young's modulus E 1 , E 2 , E. Let it be 3. At this time, the magnitude relationship is α 1 <α 3 and α 3 <α 2 and E 2 <E 3 .
In the configuration of FIG. 2, the member A is the nipple 3, the member B is the fixing member 2, and the member C is the water channel portion 1. The thermal fixing portion 110 includes a nipple 3, a fixing member 2, and a water channel portion 1, and has a nipple 3 having a thermal expansion coefficient smaller than that of the water channel portion 1, a fixing member 2 having a thermal expansion coefficient larger than that of the water channel portion 1, and a Young rate of the water channel portion. It is composed of the fixing member 2 smaller than 1, and the nipple 3, the fixing member 2, and the water channel 1 are arranged in this order in the thermal fixing portion 110 in the radial direction from the press-fitting center axis of the nipple 3.

また、ニップル３の熱膨張係数α１が水路部１の熱膨張係数α３よりも小さくなるよう水路部１とニップル３の材質を選定する。例えば、水路部１を軽量化と生産性の観点からアルミダイカスト製とし、ニップル３を加工性の観点より炭素鋼鋼管とし、固定部材２をゴム部材又は樹脂材料とすることが考えられる。 The thermal expansion coefficient alpha 1 of the nipple 3 is selected the material of the water channel 1 and the nipple 3 to be smaller than the thermal expansion coefficient alpha 3 of waterway section 1. For example, it is conceivable that the water channel portion 1 is made of aluminum die-cast from the viewpoint of weight reduction and productivity, the nipple 3 is made of carbon steel pipe from the viewpoint of workability, and the fixing member 2 is made of a rubber member or a resin material.

次に液冷装置の製造方法について説明する。まず水路接続部１１の圧入部１００をニップル３と隙間ばめになるよう穴を加工する。そして熱固定部１１０において、水路接続部１１と固定部材２との関係を締りばめになるよう加工する。組み立てにおいて、初めにニップル３に固定部材２を圧入する。次にニップル３のフランジ部３１に荷重を加えて水路部１の圧入部１００にニップル３を圧入する。
また固定部材２の製造方法において、液体状の材料を熱固定部１１０に封入し硬化させることで樹脂材料を成型する方法でも作成することができる。本実施の形態において、あらかじめリング状の樹脂材料を製作し固定部材２として嵌合させる方法と、液状の材料を硬化させる方法のどちらの方法を採用することができる。 Next, a method of manufacturing the liquid cooling device will be described. First, a hole is formed in the press-fitting portion 100 of the water channel connecting portion 11 so as to form a gap fit with the nipple 3. Then, in the heat fixing portion 110, the relationship between the water channel connecting portion 11 and the fixing member 2 is processed so as to be tightened. In assembling, the fixing member 2 is first press-fitted into the nipple 3. Next, a load is applied to the flange portion 31 of the nipple 3 to press-fit the nipple 3 into the press-fitting portion 100 of the water channel portion 1.
Further, in the method of manufacturing the fixing member 2, it can also be produced by a method of molding a resin material by enclosing a liquid material in a heat fixing portion 110 and curing the material. In the present embodiment, either a method of producing a ring-shaped resin material in advance and fitting it as the fixing member 2 or a method of curing the liquid material can be adopted.

以上のような構成においては、熱固定部１１０において、圧入時より環境温度が高温になった際、ニップル３及び水路部１の熱膨張係数より固定部材２の熱膨張係数が大きいため、ニップル３と水路部１の間に押し付け力が発生し、熱固定部１１０が径方向に締まり固定力が向上する。
また固定部材２のヤング率より水路部１のヤング率が大きいため、固定部材２が熱膨張した際に、熱膨張による変形を抑制しようとする反力（熱膨張による径方向に広がることを妨害する力）が水路部１から固定部材２にかかる。これにより、固定部材２が水路部１とニップル３の間を取り持つ力を発生させることができる。
さらに圧入時より環境温度が低温になった際、圧入部１００においてニップル３の径方向の収縮率よりも水路部１の収縮率が大きいため、ニップル３が締まり、固定力が向上する。以上より、環境温度が高温及び低温になっても固定力が向上するような嵌合構造を提供することができる。 In the above configuration, when the environmental temperature of the heat fixing portion 110 becomes higher than that at the time of press fitting, the thermal expansion coefficient of the fixing member 2 is larger than the thermal expansion coefficient of the nipple 3 and the water channel portion 1, so that the nipple 3 A pressing force is generated between the water channel portion 1 and the water channel portion 1, and the thermal fixing portion 110 is tightened in the radial direction to improve the fixing force.
Further, since the Young's modulus of the water channel 1 is larger than the Young's modulus of the fixing member 2, when the fixing member 2 is thermally expanded, a reaction force (which hinders the expansion in the radial direction due to the thermal expansion) to suppress the deformation due to the thermal expansion is prevented. Force) is applied from the water channel 1 to the fixing member 2. As a result, the fixing member 2 can generate a force for holding between the water channel portion 1 and the nipple 3.
Further, when the environmental temperature becomes lower than that at the time of press-fitting, the shrinkage rate of the water channel portion 1 is larger than the contraction rate of the nipple 3 in the radial direction in the press-fitting portion 100, so that the nipple 3 is tightened and the fixing force is improved. From the above, it is possible to provide a fitting structure in which the fixing force is improved even when the environmental temperature becomes high or low.

本実施の形態の基本的考えとしては、高温時に固定力を向上させるため固定部材２を備える熱固定部１１０を採用し、低温時は圧入部１００で固定力を持たせるものである。即ち高温時には、熱固定部１１０において、（水路部１の熱膨張係数α３）＜（固定部材２の熱膨張係数α２）なる関係より、固定部材２の膨張が水路部１の膨張より大きいので、固定部材２が水路部１を径方向に押し広げる力が発生する。その際（固定部材２のヤング率Ｅ２）＜（水路部１のヤング率Ｅ３）なる関係であることにより固定部材２の膨張（変形）を水路部１が押しとどめることができ、ニップル３と水路部１の間を取り持つことができるため、固定力が向上する。
一方低温時、圧入部１００において、（ニップル３の熱膨張係数α１）＜（水路部１の熱膨張係数α３）なる関係よりニップル３の収縮率より水路部１の収縮率のほうが大きいため、水路部１がニップル３を締め付け、固定力が向上する。 The basic idea of the present embodiment is to employ a heat fixing portion 110 provided with a fixing member 2 in order to improve the fixing force at a high temperature, and to give a fixing force to the press-fitting portion 100 at a low temperature. That is, at a high temperature, the expansion of the fixing member 2 is larger than the expansion of the water channel 1 due to the relationship of (coefficient of thermal expansion α 3 of the water channel 1) <(coefficient of thermal expansion α 2 of the fixing member 2) in the thermal fixing unit 110. Therefore, a force is generated in which the fixing member 2 pushes the water channel portion 1 in the radial direction. At that time (Young's modulus E 2 of the fixing member 2) <expansion of the fixing member 2 by a relationship: (the Young's modulus E 3 of the water channel section 1) the (modified) can be kept pressed waterway section 1, the nipple 3 Since it can be held between the water channel portion 1 and the water channel portion 1, the fixing force is improved.
On the other hand, at low temperature, the shrinkage rate of the water channel 1 is larger than the shrinkage rate of the nipple 3 in the press-fitting section 100 because of the relationship (thermal expansion coefficient α 1 of the nipple 3) <(thermal expansion coefficient α 3 of the water channel 1). , The water channel 1 tightens the nipple 3, and the fixing force is improved.

また、水路部１とニップル３を圧入嵌合とすることで、部品の嵌合を容易にし、生産性が向上する。またニップル３にフランジ部３１を設けたことにより、装置により容易に圧入することができるようになり生産効率が高まる。さらに固定部材２を水路部１の内部に配置することによって、ニップル３を水路部１に圧入する際に同時にニップル３と、固定部材２と、水路部１の嵌合を行うことができる。 Further, by press-fitting the water channel portion 1 and the nipple 3, the fitting of the parts is facilitated and the productivity is improved. Further, since the flange portion 31 is provided on the nipple 3, it can be easily press-fitted by the device, and the production efficiency is improved. Further, by arranging the fixing member 2 inside the water channel portion 1, the nipple 3, the fixing member 2, and the water channel portion 1 can be fitted at the same time when the nipple 3 is press-fitted into the water channel portion 1.

また圧入部１００及び熱固定部１１０の嵌め合いの関係は前記の関係のみに限られるものではなく、例えばより固定力を向上させる目的でニップル３と水路部１とで構成される圧入部１００を焼き嵌めすることもできる。
例えば本実施形態とは異なり、単純なニップル３と水路部１の圧入構造のみ採用する場合においては、締りばめにする必要があり、固定力を向上させるため締め代を大きくしなければならない。しかし、ニップル３を鉄、水路部１をアルミで制作するので、ニップル３を水路部１に圧入する際、ニップル３によって水路部１を損傷することがある。
これに対して本実施の形態では、熱固定部１１０において、固定部材２をニップル３と締まりばめにすることで製造時の固定力を確保できるので、圧入部１００においてニップル３と水路部１を隙間ばめとすることにより、ニップル３を水路部１に圧入する際、水路部１を損傷することを防止することができる。 Further, the fitting relationship between the press-fitting portion 100 and the heat fixing portion 110 is not limited to the above-mentioned relationship, and for example, the press-fitting portion 100 composed of the nipple 3 and the water channel portion 1 is provided for the purpose of further improving the fixing force. It can also be shrink-fitted.
For example, unlike the present embodiment, when only a simple press-fitting structure of the nipple 3 and the water channel portion 1 is adopted, it is necessary to use a tightening fit, and a tightening allowance must be increased in order to improve the fixing force. However, since the nipple 3 is made of iron and the water channel portion 1 is made of aluminum, when the nipple 3 is press-fitted into the water channel portion 1, the water channel portion 1 may be damaged by the nipple 3.
On the other hand, in the present embodiment, since the fixing force at the time of manufacturing can be secured by tightening the fixing member 2 with the nipple 3 in the heat fixing portion 110, the nipple 3 and the water channel portion 1 in the press-fitting portion 100. By using the above as a gap fit, it is possible to prevent the water channel portion 1 from being damaged when the nipple 3 is press-fitted into the water channel portion 1.

さらに例えば自動車用機器に本実施の形態を用いる場合、ニップル３が高温になるような動作状態、たとえば高速で走行している場合、あるいはエンジンが高い駆動力を発生させている場合などに、自動車用機器に作用する振動が大きくなったり、あるいはニップルが共振することが懸念される。これによりニップル３の圧入部１００に繰り返しの応力が生じ、変形または破壊に至ると水漏れまたは固定強度の低下の原因となる。対策として、嵌合部の固定強度を向上させるためにニップル３の直径を増加させたり、追加部材を配置することが考えられる。しかしこれでは製品サイズ、重量の増大につながる。本実施の形態では、水路部１内に固定部材２を配置するとともに、固定部材２を粘性のある部材、例えばゴムまたは樹脂材料で形成することができる。これにより振動において減衰力を発生させることができ、振動レベルを低減させることができる。従って自動車の振動によってニップル３が共振して、変形または破壊されるのを外部部材を追加したり、又製品を大型化することなしに防止できる。 Further, for example, when the present embodiment is used for an automobile device, the automobile is in an operating state where the nipple 3 becomes hot, for example, when the vehicle is traveling at a high speed, or when the engine is generating a high driving force. There is a concern that the vibration acting on the equipment may increase or the nipple may resonate. As a result, repeated stress is generated in the press-fitting portion 100 of the nipple 3, and if it is deformed or broken, it causes water leakage or a decrease in fixing strength. As a countermeasure, it is conceivable to increase the diameter of the nipple 3 or arrange an additional member in order to improve the fixing strength of the fitting portion. However, this leads to an increase in product size and weight. In the present embodiment, the fixing member 2 can be arranged in the water channel portion 1, and the fixing member 2 can be formed of a viscous member such as rubber or a resin material. As a result, a damping force can be generated in the vibration, and the vibration level can be reduced. Therefore, it is possible to prevent the nipple 3 from resonating due to the vibration of the automobile and being deformed or destroyed without adding an external member or increasing the size of the product.

本実施の形態によれば、環境温度が圧入時より高温の場合に嵌合部が締まる。ニップル３の熱膨張係数が水路部１よりも小さく、水路部１と水路部１に圧入されるニップル３とで構成される圧入部１００を備えることにより、環境温度が圧入時より低温の場合も嵌合部が締まる。さらに水路部１とニップル３を圧入構造とすることにより、嵌合が容易になる。これらの結果、環境温度が圧入時に対して高温、低温の両方で嵌合部の固定力を確保することができる。又液冷装置の嵌合を容易にできる。 According to this embodiment, the fitting portion is tightened when the environmental temperature is higher than that at the time of press fitting. The coefficient of thermal expansion of the nipple 3 is smaller than that of the water channel 1, and the press-fitting portion 100 including the water channel 1 and the nipple 3 to be press-fitted into the water channel 1 is provided, so that the environmental temperature may be lower than that at the time of press-fitting. The mating part is tightened. Further, by forming the water channel portion 1 and the nipple 3 into a press-fitting structure, fitting becomes easy. As a result, it is possible to secure the fixing force of the fitting portion at both a high temperature and a low temperature when the environmental temperature is press-fitted. Further, the liquid cooling device can be easily fitted.

実施の形態２．
図３は実施の形態２による液冷装置を示す側面断面図である。水路接続部１１に圧入部１００と熱固定部１１０を備える液冷装置において、ニップル３の圧入側の端をテーパ加工し応力緩和部３３を設けたものである。その他の構成は実施の形態１と同様である。
フランジ部３１を押すことにより、ニップル３を水路部１に圧入嵌合する。例えば水路部１の強度がニップル３の強度よりも低い材料を使用する場合、ニップル３を圧入する際、ニップル３の圧入側の先端と水路部１の間に応力が集中し、水路部１を損傷することがある。本実施の形態によれば、ニップル３の圧入側の先端に応力緩和部３３を設けたので、ニップル３の先端の応力集中を緩和することができ、ニップル３を水路部１に圧入する際、水路部１が損傷することを防止できる。 Embodiment 2.
FIG. 3 is a side sectional view showing the liquid cooling device according to the second embodiment. In a liquid cooling device having a press-fitting portion 100 and a heat fixing portion 110 in the water channel connecting portion 11, the end on the press-fitting side of the nipple 3 is tapered to provide a stress relaxation portion 33. Other configurations are the same as those in the first embodiment.
By pushing the flange portion 31, the nipple 3 is press-fitted into the water channel portion 1. For example, when a material having a strength lower than that of the nipple 3 is used, stress is concentrated between the tip of the nipple 3 on the press-fitting side and the water channel 1 when the nipple 3 is press-fitted, and the water channel 1 is pressed. May be damaged. According to the present embodiment, since the stress relaxation portion 33 is provided at the tip of the nipple 3 on the press-fitting side, the stress concentration at the tip of the nipple 3 can be relaxed, and when the nipple 3 is press-fitted into the water channel portion 1, the stress concentration can be relaxed. It is possible to prevent the water channel portion 1 from being damaged.

実施の形態３．
図４は実施の形態３による液冷装置を示す側面断面図である。図５は実施の形態３による液冷装置を示す熱固定部１１０の圧入中心軸に対して垂直な断面図であり、図４におけるＧ−Ｇ線断面図である。熱固定部１１０においてニップル３、固定部材２、水路部１を備え、熱膨張係数が固定部材２より小さいニップル３と、熱膨張係数が水路部１より小さい固定部材２と、ヤング率が水路部１より大きい固定部材２によって構成され、熱固定部１１０のニップル３の圧入中心軸から径方向に向かってニップル３、水路部１、固定部材２の順で配置する。
例えば、水路部１を軽量化と生産性の観点からアルミダイカスト製で構成し、ニップル３を加工性の観点より炭素鋼鋼管で構成し、更に固定部材２を銅合金または鉄鋼系材料で構成することができる。なお熱固定部１１０の構成以外は、実施の形態１と同様の構成である。 Embodiment 3.
FIG. 4 is a side sectional view showing the liquid cooling device according to the third embodiment. FIG. 5 is a cross-sectional view perpendicular to the press-fitting center axis of the heat fixing portion 110 showing the liquid cooling device according to the third embodiment, and is a cross-sectional view taken along the line GG in FIG. The thermal fixing portion 110 includes a nipple 3, a fixing member 2, and a water channel portion 1, and has a nipple 3 having a coefficient of thermal expansion smaller than that of the fixing member 2, a fixing member 2 having a coefficient of thermal expansion smaller than that of the water channel portion 1, and a water channel portion having a Young rate. It is composed of a fixing member 2 larger than 1, and the nipple 3, the water channel 1, and the fixing member 2 are arranged in this order in the radial direction from the press-fitting center axis of the nipple 3 of the thermal fixing portion 110.
For example, the water channel 1 is made of aluminum die-cast from the viewpoint of weight reduction and productivity, the nipple 3 is made of carbon steel pipe from the viewpoint of workability, and the fixing member 2 is made of copper alloy or steel-based material. be able to. The configuration is the same as that of the first embodiment except for the configuration of the heat fixing portion 110.

この構成によると熱固定部１１０において、圧入時より環境温度が高温になった際、ニップル３と固定部材２の熱膨張率より水路部１の熱膨張率が大きいため、ニップル３と固定部材２の間に応力を発生させることができ、締まり固定力が向上する。その際（水路部１のヤング率Ｅ３）＜（固定部材２のヤング率Ｅ２）なる関係であることにより、水路部１の膨張（変形）を固定部材２が押しとどめることができ、ニップル３と水路部１の間を取り持つことができるため、固定力が向上する。
さらに、圧入時より環境温度が低温になった際、圧入部１００において、ニップル３の径方向の収縮率より水路部１の収縮率が大きいため、締まり固定力が向上する。
また固定部材２を水路部１の外部に配置することによって、圧入部１００を熱固定部１１０にも利用可能となるため、ニップル３の圧入軸方向の長さを短くすることができる。 According to this configuration, in the heat fixing portion 110, when the environmental temperature becomes higher than that at the time of press fitting, the thermal expansion coefficient of the water channel portion 1 is larger than the thermal expansion coefficient of the nipple 3 and the fixing member 2, so that the nipple 3 and the fixing member 2 Stress can be generated between the two, and the tightening and fixing force is improved. At that time, since the relationship is (Young's modulus E 3 of the water channel 1) <(Young's modulus E 2 of the fixing member 2), the fixing member 2 can hold down the expansion (deformation) of the water channel 1 and the nipple. Since it can be held between 3 and the water channel portion 1, the fixing force is improved.
Further, when the environmental temperature becomes lower than that at the time of press-fitting, the shrinkage rate of the water channel portion 1 is larger than the contraction rate of the nipple 3 in the radial direction in the press-fitting portion 100, so that the tightening fixing force is improved.
Further, by arranging the fixing member 2 outside the water channel portion 1, the press-fitting portion 100 can also be used for the heat fixing portion 110, so that the length of the nipple 3 in the press-fitting axial direction can be shortened.

実施の形態４．
実施の形態４を図に基づいて説明する。図６は実施の形態４による液冷装置を示す熱固定部の圧入中心軸に対して垂直な断面図である。実施の形態１では固定部材２の形状について説明しなかったが、本実施形態においては、固定部材２の形状を、圧入中心軸に垂直な断面からみて、内径側を円形に形成するとともに外径側を円形に構成するものである。なお熱固定部１１０の構成以外は、実施の形態１と同様の構成である。
この構成によると、例えば水路部１の内側に固定部材２を配置するとき、水路部１に座ぐり穴を加工することにより、水路部１に固定部材２を容易に嵌合することができる。例えば製造方法として、初めに水路部１に固定部材２を嵌合する。その後固定部材２と水路部１にニップル３を圧入することでニップル３の圧入時における位置決めが容易となる。以上のように構成することにより、加工及び嵌合を容易に行うことができ、生産性を向上させることができる。
尚図４の構成においても、固定部材２の形状を、圧入中心軸に垂直な断面からみて、内径側を円形に形成するとともに外径側を円形に構成することができる（図５参照）。 Embodiment 4.
Embodiment 4 will be described with reference to the drawings. FIG. 6 is a cross-sectional view perpendicular to the press-fitting central axis of the heat fixing portion showing the liquid cooling device according to the fourth embodiment. Although the shape of the fixing member 2 has not been described in the first embodiment, in the present embodiment, the shape of the fixing member 2 is formed into a circular shape on the inner diameter side and an outer diameter when viewed from a cross section perpendicular to the press-fitting center axis. The side is formed in a circular shape. The configuration is the same as that of the first embodiment except for the configuration of the heat fixing portion 110.
According to this configuration, for example, when the fixing member 2 is arranged inside the water channel portion 1, the fixing member 2 can be easily fitted to the water channel portion 1 by forming a counterbore in the water channel portion 1. For example, as a manufacturing method, the fixing member 2 is first fitted to the water channel portion 1. After that, by press-fitting the nipple 3 into the fixing member 2 and the water channel portion 1, the positioning of the nipple 3 at the time of press-fitting becomes easy. With the above configuration, processing and fitting can be easily performed, and productivity can be improved.
Also in the configuration of FIG. 4, the shape of the fixing member 2 can be formed to be circular on the inner diameter side and circular on the outer diameter side when viewed from the cross section perpendicular to the press-fitting center axis (see FIG. 5).

実施の形態５．
図７は実施の形態５による液冷装置を示す熱固定部の圧入中心軸に対して垂直な断面図である。固定部材２の形状を、圧入中心軸に垂直な断面からみて、内径側を円形に形成するとともに、外径側を四角形状にする。なお熱固定部１１０の構成以外は、実施の形態１と同様の構成である。
水路部１に嵌合される曲げ部を有するニップル３において、ニップル３に対して外部よりホースを接続する際、または稼働時の振動によって外力が発生し、圧入中心軸に対して回転方向のトルクが発生する。そのためニップル３と水路部１の嵌合部が回転トルクにより破壊したりすると水漏れまたは固定強度の低下が発生する。
図７のように構成することにより、例えば水路部１の内側に固定部材２を配置するとき、水路部１に四角形の穴を加工することにより、固定部材２と嵌合させることができる。又固定部材２の外形が四角形状のため、ニップル３の圧入軸に対する回転方向の固定力を向上させることができる。なお図７の構成においても実施の形態４と同様座ぐり穴を設けても良い。又固定部材２の外形は四角形状に限らず三角形等の他の多角形状であっても良い。 Embodiment 5.
FIG. 7 is a cross-sectional view perpendicular to the press-fitting central axis of the heat fixing portion showing the liquid cooling device according to the fifth embodiment. The shape of the fixing member 2 is formed into a circular shape on the inner diameter side and a quadrangular shape on the outer diameter side when viewed from a cross section perpendicular to the press-fitting center axis. The configuration is the same as that of the first embodiment except for the configuration of the heat fixing portion 110.
In the nipple 3 having a bent portion fitted to the water channel portion 1, an external force is generated when a hose is connected to the nipple 3 from the outside or due to vibration during operation, and torque in the rotational direction with respect to the press-fitting central axis is generated. Occurs. Therefore, if the fitting portion between the nipple 3 and the water channel portion 1 is broken by the rotational torque, water leakage or a decrease in the fixing strength occurs.
With the configuration as shown in FIG. 7, for example, when the fixing member 2 is arranged inside the water channel portion 1, it can be fitted to the fixing member 2 by processing a quadrangular hole in the water channel portion 1. Further, since the outer shape of the fixing member 2 is rectangular, the fixing force of the nipple 3 in the rotational direction with respect to the press-fitting shaft can be improved. In the configuration of FIG. 7, a counterbore may be provided as in the fourth embodiment. Further, the outer shape of the fixing member 2 is not limited to a quadrangular shape, and may be another polygonal shape such as a triangle.

実施の形態６．
図８は実施の形態６による液冷装置を示す熱固定部の圧入中心軸に対して垂直な断面図である。固定部材２がニップル３と水路部１の両方に圧入中心軸に対して円周上に離散的に接するよう配置する。ニップル３と水路部１の間で複数の固定部材２によって複数の接触個所を有するよう固定部材２は配置されている。尚図８においては、それぞれの固定部材２が独立して配置されている例を示したが、図９に示すように連接部２１によって複数の固定部材２が接続されていても良い。なお熱固定部の構成以外は、実施の形態１と同様の構成である。
以上のように構成することにより、熱膨張により固定部材２は圧入中心軸に対して垂直である径方向に伸びようとするため、ニップル３と固定部材２が円周の全周に亘って接する構造に比べて、固定部材２の内円の広がりによる固定力の低下を防止できる。 Embodiment 6.
FIG. 8 is a cross-sectional view perpendicular to the press-fitting central axis of the heat fixing portion showing the liquid cooling device according to the sixth embodiment. The fixing member 2 is arranged so as to be discretely in contact with both the nipple 3 and the water channel portion 1 on the circumference with respect to the press-fitting center axis. The fixing member 2 is arranged between the nipple 3 and the water channel portion 1 so as to have a plurality of contact points by the plurality of fixing members 2. Although FIG. 8 shows an example in which each fixing member 2 is arranged independently, a plurality of fixing members 2 may be connected by the connecting portion 21 as shown in FIG. The configuration is the same as that of the first embodiment except for the configuration of the heat fixing portion.
With the above configuration, the fixing member 2 tends to extend in the radial direction perpendicular to the press-fitting central axis due to thermal expansion, so that the nipple 3 and the fixing member 2 come into contact with each other over the entire circumference. Compared to the structure, it is possible to prevent a decrease in the fixing force due to the expansion of the inner circle of the fixing member 2.

実施の形態７．
図１０は実施の形態７による液冷装置を示す側面断面図である。水路部１とニップル３の間に接着剤たまり部１２０を備え、接着剤たまり部１２０に接着剤４を封入するものである。水路部１の外部より内側に向かって、水路接続部１１の穴に対してニップル３の径よりも大きい座ぐり穴による段差部を設ける。これによりニップル３を圧入した際に、圧入軸に対して径方向にニップル３と水路部１が向かい合う空間を有することとなる。このようなニップル３と水路部１からなる空間を接着剤たまり部１２０とし、接着剤４を封入する。図１０においては、圧入軸に沿って水路部１の外部より固定部材２、接着剤たまり部１２０、圧入部１００の順に構成される。 Embodiment 7.
FIG. 10 is a side sectional view showing the liquid cooling device according to the seventh embodiment. An adhesive pool 120 is provided between the water channel 1 and the nipple 3, and the adhesive 4 is sealed in the adhesive pool 120. A step portion is provided from the outside to the inside of the water channel portion 1 by a counterbore hole larger than the diameter of the nipple 3 with respect to the hole of the water channel connection portion 11. As a result, when the nipple 3 is press-fitted, the nipple 3 and the water channel 1 face each other in the radial direction with respect to the press-fitting shaft. The space formed by the nipple 3 and the water channel 1 is used as the adhesive pool 120, and the adhesive 4 is sealed. In FIG. 10, the fixing member 2, the adhesive pool portion 120, and the press-fitting portion 100 are configured in this order from the outside of the water channel portion 1 along the press-fitting shaft.

以上のように構成することにより、ニップル３、水路部１、固定部材２にて密閉される接着剤たまり部１２０に接着剤４を封入することができる。接着剤４によりニップル３の固定力が向上するとともに、水路を流れる冷却液の漏れを防ぐシール材としても効果を発揮する。また密閉空間を備えることで、嫌気性接着剤を使用することが可能となり、高温で硬化する等の工程の必要性がなくなり、接着剤を容易に硬化させることができる。 With the above configuration, the adhesive 4 can be sealed in the adhesive pool 120 sealed by the nipple 3, the water channel 1, and the fixing member 2. The adhesive 4 improves the fixing force of the nipple 3, and is also effective as a sealing material for preventing leakage of the coolant flowing through the water channel. Further, by providing a closed space, it becomes possible to use an anaerobic adhesive, eliminating the need for a process such as curing at a high temperature, and the adhesive can be easily cured.

また接着剤たまり部１２０を構成する構造は上記の構成のみに限られるものではなく、例えば図１１に示すように、圧入軸に沿って水路の外部よりフランジ部３１、接着剤たまり部１２０、固定部材２、圧入部１００とすることもできる。以上のように構成することにより、ニップル３、水路部１、固定部材２、フランジ部３１により密閉される接着剤たまり部１２０に接着剤４を封入することができる。これにより接着剤４がニップル３のフランジ部３１にも接着し、接着剤４とニップル３の接着面積を広げることが可能であるため、さらに固定力を向上することができる。
又図４の構成においても、水路部１とニップル３の間に接着剤たまり部１２０を備え、接着剤たまり部１２０に接着剤４を封入することができる。 Further, the structure constituting the adhesive pool portion 120 is not limited to the above configuration, and for example, as shown in FIG. 11, the flange portion 31, the adhesive pool portion 120, and the fixing portion 120 are fixed from the outside of the water channel along the press-fitting shaft. The member 2 and the press-fitting portion 100 can also be used. With the above configuration, the adhesive 4 can be sealed in the adhesive pool 120 sealed by the nipple 3, the water channel 1, the fixing member 2, and the flange 31. As a result, the adhesive 4 also adheres to the flange portion 31 of the nipple 3, and the adhesive area between the adhesive 4 and the nipple 3 can be expanded, so that the fixing force can be further improved.
Further, also in the configuration of FIG. 4, an adhesive pool 120 is provided between the water channel 1 and the nipple 3, and the adhesive 4 can be sealed in the adhesive pool 120.

実施の形態８．
図１２は実施の形態８による回転電機を示す断面図である。回転電機は回転電機本体２００と、電力供給ユニット５００と、液冷装置３００を備える。電力供給ユニット５００は回転電機本体２００の軸方向延長部に配置され、回転電機本体と一体化されるとともに回転電機本体２００に電力を供給する。又液冷装置３００は電力供給ユニット５００と接するように配置される。回転電機本体２００は、内燃機関（図示せず）を駆動する電動機として動作し、あるいは内燃機関により駆動されて発電する発電機として動作することができる。 Embodiment 8.
FIG. 12 is a cross-sectional view showing a rotary electric machine according to the eighth embodiment. The rotary electric machine includes a rotary electric machine main body 200, a power supply unit 500, and a liquid cooling device 300. The power supply unit 500 is arranged in the axial extension portion of the rotary electric machine main body 200, is integrated with the rotary electric machine main body, and supplies electric power to the rotary electric machine main body 200. The liquid cooling device 300 is arranged so as to be in contact with the power supply unit 500. The rotary electric machine main body 200 can operate as an electric motor for driving an internal combustion engine (not shown), or can operate as a generator for generating electricity by being driven by the internal combustion engine.

回転電機本体２００は、フロントブラケット６１と、リヤブラケット６２からなるハウジング６を有する。フロントブラケット６１は金属材料を用いて椀状に形成されるとともに回転電機本体２００の軸において負荷側のブラケットとなる。リヤブラケット６２は金属材料を用いて椀状に形成されるとともに反負荷側のブラケットとなる。又回転電機本体２００は、回転軸７１に固定された回転子７３と、回転子７３に設けられた界磁巻線７２と、固定子８とを備えている。固定子８は固定子鉄心８２と、固定子鉄心８２に装着された固定子巻線８１とを有する。 The rotary electric machine main body 200 has a housing 6 including a front bracket 61 and a rear bracket 62. The front bracket 61 is formed in a bowl shape using a metal material and serves as a load-side bracket on the shaft of the rotary electric machine main body 200. The rear bracket 62 is formed in a bowl shape using a metal material and serves as a bracket on the counterload side. Further, the rotary electric machine main body 200 includes a rotor 73 fixed to the rotary shaft 71, a field winding 72 provided on the rotor 73, and a stator 8. The stator 8 has a stator core 82 and a stator winding 81 mounted on the stator core 82.

回転軸７１は、フロントブラケット６１に設けられたフロント側ベアリング６３と、リヤブラケット６２に設けられたリヤ側ベアリング６４とによりハウジング６に回転可能に支持されている。回転子７３は、回転軸７１に固定されており、ハウジング６内に回転可能に配置されている。固定子鉄心８２は、フロントブラケット６１の軸方向の一端部と、リヤブラケット６２の軸方向の他端部により軸方向の両側から挟持されて、ハウジング６に固定されている。固定子８の内周面は、回転子７３の外周面に対して所定のエアギャップを介して径方向に対向している。 The rotary shaft 71 is rotatably supported by the housing 6 by a front bearing 63 provided on the front bracket 61 and a rear bearing 64 provided on the rear bracket 62. The rotor 73 is fixed to the rotating shaft 71 and is rotatably arranged in the housing 6. The stator core 82 is sandwiched from both sides in the axial direction by one end in the axial direction of the front bracket 61 and the other end in the axial direction of the rear bracket 62, and is fixed to the housing 6. The inner peripheral surface of the stator 8 faces the outer peripheral surface of the rotor 73 in the radial direction via a predetermined air gap.

フロントブラケット６１から反回転電機本体側に突出した回転軸７１のフロント側端部には、プーリー９が装着されている。回転電機本体２００は、プーリー９及びプーリー９に巻き掛けられたベルト（図示せず）を介して内燃機関のクランク軸（図示せず）に連結される。
電力供給ユニット５００は電力変換回路部と制御回路部を備えた電力制御装置５１と、回転子７３に電力を供給するブラシ５２とを備える。 A pulley 9 is attached to the front end of the rotating shaft 71 protruding from the front bracket 61 toward the main body of the anti-rotating electric machine. The rotary electric machine main body 200 is connected to the crankshaft (not shown) of the internal combustion engine via the pulley 9 and the belt (not shown) wound around the pulley 9.
The power supply unit 500 includes a power control device 51 including a power conversion circuit unit and a control circuit unit, and a brush 52 that supplies power to the rotor 73.

図１３は実施の形態８による回転電機の冷却構造を示す側面断面図である。液冷装置においては、電力制御装置５１と水路部１が接するように配置される。その他の構成は実施の形態１と同様である。また水路部１とニップル３の間に接着剤たまり部を設け、接着剤たまり部に接着剤４を封入する構造とすることもできる。水路接続部１１の穴に座ぐり穴による段差部を設け、ニップル３、水路部１及び固定部材２からなる空間に接着剤４を封入する。 FIG. 13 is a side sectional view showing a cooling structure of the rotary electric machine according to the eighth embodiment. In the liquid cooling device, the power control device 51 and the water channel portion 1 are arranged so as to be in contact with each other. Other configurations are the same as those in the first embodiment. Further, an adhesive pool portion may be provided between the water channel portion 1 and the nipple 3, and the adhesive 4 may be sealed in the adhesive pool portion. A step portion by a counterbore is provided in the hole of the water channel connection portion 11, and the adhesive 4 is sealed in the space composed of the nipple 3, the water channel portion 1 and the fixing member 2.

上記構造は、例えば車載用の機電一体型回転電機に使用することができ、電源制御部の冷却に用いられる。従来車載用の機電一体型回転電機の電源制御部の冷却は空冷構造を採用していた。しかし近年機電一体型回転電機の高出力化、小型化により、冷却性能の向上が求められ、液冷構造による冷却の要求が高まっている。車載用の機電一体型回転電機において、寒冷地での低温からエンジンルーム内の高温に至るまで激しい温度変化に耐える構造と信頼性が求められる。特に液冷構造において、嵌合部の強度、及び水路部と外部とのシール性が求められる。 The above structure can be used, for example, in an in-vehicle mechanical / electrical integrated rotary electric machine, and is used for cooling a power supply control unit. Conventionally, an air-cooled structure has been adopted for cooling the power supply control unit of an in-vehicle mechanical / electrical integrated rotary electric machine. However, in recent years, due to the increase in output and miniaturization of the rotary electric machine integrated with mechanical and electrical equipment, improvement of cooling performance is required, and the demand for cooling by a liquid cooling structure is increasing. In-vehicle mechanical / electrical integrated rotary electric machines are required to have a structure and reliability that can withstand severe temperature changes from low temperatures in cold regions to high temperatures in the engine room. In particular, in a liquid-cooled structure, the strength of the fitting portion and the sealing property between the water channel portion and the outside are required.

本実施の形態による構成によれば、車載用の機電一体型回転電機において液冷構造により電源制御部の冷却性能を向上させることができる。また、圧入部１００と熱固定部１１０を持つ嵌合構造とすることにより、環境温度が変化しても固定強度を保つことができ、信頼性を高めることができる。また、ニップル３、水路部１、固定部材２又はフランジ部３１からなる空間にシール材となる接着剤４を封入することで水路部１からの水漏れを防止することができる。 According to the configuration according to the present embodiment, the cooling performance of the power supply control unit can be improved by the liquid cooling structure in the in-vehicle mechanical / electrical integrated rotary electric machine. Further, by adopting a fitting structure having the press-fitting portion 100 and the heat fixing portion 110, the fixing strength can be maintained even if the environmental temperature changes, and the reliability can be improved. Further, by enclosing the adhesive 4 serving as a sealing material in the space composed of the nipple 3, the water channel portion 1, the fixing member 2 or the flange portion 31, water leakage from the water channel portion 1 can be prevented.

実施の形態９．
図１４は実施の形態９による液冷装置を示す側面断面図である。回転電機には、電力変換回路部と制御回路部とを備えた電力制御装置５を設け、電力制御装置５と水路部１が接するように配置される。更にニップル３の圧入側の端をテーパ加工し、応力緩和部３３を設ける。その他の構成は実施の形態８と同様である。 Embodiment 9.
FIG. 14 is a side sectional view showing the liquid cooling device according to the ninth embodiment. The rotary electric machine is provided with a power control device 5 having a power conversion circuit unit and a control circuit unit, and is arranged so that the power control device 5 and the water channel unit 1 are in contact with each other. Further, the end of the nipple 3 on the press-fitting side is tapered to provide a stress relaxation portion 33. Other configurations are the same as those in the eighth embodiment.

例えば水路を有する車載用の機電一体型回転電機において、ニップル３を圧入する際、ニップル３の圧入側の先端と水路部１の間に応力が集中し、水路部１を損傷し、部材が脱落して水路部１に残るおそれがある。水路部１はその他の機器、例えばエンジンラジエータまたは冷却液を循環させるポンプと接続されており、水路内部に異物が存在すると配管が詰まり、車載用機器全体の故障につながる原因となる。
本実施の形態においては、ニップル３の圧入側の先端に応力緩和部３３を設けることで、ニップル３の先端の応力集中を緩和することができ、ニップル３を水路部１に圧入する際、水路部１が損傷することを防止できる。 For example, in an in-vehicle mechanical / electrical integrated rotary electric machine having a water channel, when the nipple 3 is press-fitted, stress is concentrated between the tip of the nipple 3 on the press-fitting side and the water channel portion 1, the water channel portion 1 is damaged, and the member falls off. Then, it may remain in the waterway portion 1. The water channel 1 is connected to other equipment, for example, an engine radiator or a pump that circulates a coolant, and if foreign matter is present inside the water channel, the piping is clogged, which causes a failure of the entire vehicle-mounted device.
In the present embodiment, by providing the stress relaxation portion 33 at the tip of the nipple 3 on the press-fitting side, the stress concentration at the tip of the nipple 3 can be relaxed, and when the nipple 3 is press-fitted into the water channel portion 1, the water channel can be relaxed. It is possible to prevent the part 1 from being damaged.

本願は、様々な例示的な実施の形態及び実施例が記載されているが、１つ、または複数の実施の形態に記載された様々な特徴、態様、及び機能は特定の実施の形態の適用に限られるのではなく、単独で、または様々な組み合わせで実施の形態に適用可能である。
従って、例示されていない無数の変形例が、本願に開示される技術の範囲内において想定される。例えば、少なくとも１つの構成要素を変形する場合、追加する場合または省略する場合、さらには、少なくとも１つの構成要素を抽出し、他の実施の形態の構成要素と組み合わせる場合が含まれるものとする。 Although the present application describes various exemplary embodiments and examples, the various features, embodiments, and functions described in one or more embodiments are applications of a particular embodiment. It is not limited to, but can be applied to embodiments alone or in various combinations.
Therefore, innumerable variations not illustrated are envisioned within the scope of the techniques disclosed in the present application. For example, it is assumed that at least one component is modified, added or omitted, and further, at least one component is extracted and combined with the components of other embodiments.

１ 水路部、２ 固定部材、３ ニップル、４ 接着剤、１１ 水路接続部、
３３ 応力緩和部、１００ 圧入部、１１０ 熱固定部、１２０ 接着剤たまり部、
３００ 液冷装置。 1 Hydrographic Department, 2 Fixtures, 3 Nipple, 4 Adhesive, 11 Hydrographic Department,
33 Stress relaxation part, 100 press-fitting part, 110 heat fixing part, 120 adhesive pool part,
300 liquid cooling device.

Claims (10)

水路部と、前記水路部に接続されるニップルを備え、
前記水路部に設けられるとともに、水路と外部を接続する水路接続部と、
前記水路接続部に設けられるとともに前記ニップルが圧入される圧入部を備えた液冷装置であって、
前記水路接続部に熱固定部を設け、前記熱固定部において前記ニップルの圧入中心軸から径方向に向かって前記ニップル、固定部材、前記水路部の順に配置するとともに、
前記ニップルの熱膨張係数は前記水路部の熱膨張係数よりも小さく、前記固定部材の熱膨張係数は前記水路部の熱膨張係数よりも大きい液冷装置。 A water channel and a nipple connected to the water channel are provided.
A waterway connection part provided in the waterway part and connecting the waterway and the outside,
A liquid cooling device provided at the water channel connection portion and provided with a press-fitting portion into which the nipple is press-fitted.
A heat fixing portion is provided in the water channel connecting portion, and the nipple, the fixing member, and the water channel portion are arranged in this order in the radial direction from the press-fitting center axis of the nipple in the heat fixing portion.
A liquid cooling device in which the coefficient of thermal expansion of the nipple is smaller than the coefficient of thermal expansion of the water channel portion, and the coefficient of thermal expansion of the fixing member is larger than the coefficient of thermal expansion of the water channel portion. 前記固定部材のヤング率よりも前記水路部のヤング率が大きい請求項１記載の液冷装置。 The liquid cooling device according to claim 1, wherein the Young's modulus of the water channel portion is larger than the Young's modulus of the fixing member. 水路部と、前記水路部に接続されるニップルを備え、
前記水路部に設けられるとともに、水路と外部を接続する水路接続部と、
前記水路接続部に設けられるとともに前記ニップルが圧入される圧入部を備えた液冷装置であって、
前記水路接続部に熱固定部を設け、前記熱固定部において前記ニップルの圧入中心軸から径方向に向かって前記ニップル、前記水路部、固定部材の順に配置するとともに、
前記ニップルの熱膨張係数は前記固定部材の熱膨張係数よりも小さく、前記固定部材の熱膨張係数は前記水路部の熱膨張係数よりも小さい液冷装置。 A water channel and a nipple connected to the water channel are provided.
A waterway connection part provided in the waterway part and connecting the waterway and the outside,
A liquid cooling device provided at the water channel connection portion and provided with a press-fitting portion into which the nipple is press-fitted.
A heat fixing portion is provided in the water channel connecting portion, and the nipple, the water channel portion, and the fixing member are arranged in this order in the radial direction from the press-fitting center axis of the nipple in the heat fixing portion.
A liquid cooling device in which the coefficient of thermal expansion of the nipple is smaller than the coefficient of thermal expansion of the fixing member, and the coefficient of thermal expansion of the fixing member is smaller than the coefficient of thermal expansion of the water channel portion. 前記水路部のヤング率よりも前記固定部材のヤング率が大きい請求項３記載の液冷装置。 The liquid cooling device according to claim 3, wherein the Young's modulus of the fixing member is larger than the Young's modulus of the water channel portion. 前記固定部材の形状を、圧入中心軸に垂直な断面からみて、内径側を円形に形成するとともに外径側を円形に構成する請求項１から請求項４のいずれか１項に記載の液冷装置。 The liquid cooling according to any one of claims 1 to 4, wherein the shape of the fixing member is formed in a circular shape on the inner diameter side and a circular shape on the outer diameter side when viewed from a cross section perpendicular to the press-fitting center axis. Device. 前記固定部材の形状を、圧入中心軸に垂直な断面からみて、内径側を円形に形成するとともに外径側を多角形状に構成する請求項１又は請求項２に記載の液冷装置。 The liquid cooling device according to claim 1 or 2, wherein the shape of the fixing member is formed into a circular shape on the inner diameter side and a polygonal shape on the outer diameter side when viewed from a cross section perpendicular to the press-fitting center axis. 前記固定部材が前記ニップルと前記水路部の両方に円周上に離散的に接するよう配置する請求項１又は請求項２に記載の液冷装置。 The liquid cooling device according to claim 1 or 2, wherein the fixing member is arranged so as to be discretely in contact with both the nipple and the water channel portion on the circumference. 前記水路部と前記ニップルの間に接着剤たまり部を備え、前記接着剤たまり部に接着剤を封入する請求項１から請求項７のいずれか１項に記載の液冷装置。 The liquid cooling device according to any one of claims 1 to 7, wherein an adhesive pool portion is provided between the water channel portion and the nipple, and the adhesive is sealed in the adhesive pool portion. 前記ニップルの圧入側の先端をテーパ加工し応力緩和部を設けた請求項１から請求項８のいずれか１項に記載の液冷装置。 The liquid cooling device according to any one of claims 1 to 8, wherein the tip of the nipple on the press-fitting side is tapered to provide a stress relaxation portion. 請求項１から請求項９のいずれか１項に記載の液冷装置における前記水路部と、電力変換回路部と制御回路部を備えた電力制御装置とが接するように配置される液冷装置を備えた回転電機。 A liquid cooling device arranged so that the water channel portion in the liquid cooling device according to any one of claims 1 to 9 and a power control device provided with a power conversion circuit unit and a control circuit unit are in contact with each other. Equipped with a rotating electric machine.
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JP6589680B2 (en) 2016-02-19 2019-10-16 株式会社デンソー Rotating electric machine
JP6828658B2 (en) 2017-11-10 2021-02-10 トヨタ自動車株式会社 Exhaust manifold

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