JPH04304144A - Ac generator for vehicle - Google Patents
Ac generator for vehicleInfo
- Publication number
- JPH04304144A JPH04304144A JP6738691A JP6738691A JPH04304144A JP H04304144 A JPH04304144 A JP H04304144A JP 6738691 A JP6738691 A JP 6738691A JP 6738691 A JP6738691 A JP 6738691A JP H04304144 A JPH04304144 A JP H04304144A
- Authority
- JP
- Japan
- Prior art keywords
- housing
- armature
- cooling
- vehicle
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001816 cooling Methods 0.000 claims abstract description 78
- 230000002093 peripheral effect Effects 0.000 claims abstract description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 239000011347 resin Substances 0.000 description 9
- 229920005989 resin Polymers 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000005413 snowmelt Substances 0.000 description 1
Landscapes
- Motor Or Generator Cooling System (AREA)
- Synchronous Machinery (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、車両用交流発電機に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alternating current generator for a vehicle.
【０００２】0002
【従来の技術】近年、Ｅ／Ｇルームは、スタイル、居住
性向上等により狭小化の一途をたどっており、そのため
に車両用交流発電機の小型軽量化が要求されている。加
えて、車両寿命延長の要請から長寿命化のファクターも
重要となってきている。これらの要求を満足させるため
に冷却機能の向上が一層重要となっており、そのために
、例えば、特公昭５９−４２５４６号公報は、ハウジン
グの前端壁及び後端壁の両方から導入した冷却風を、界
磁子の両側端に固定された遠心ファンによりハウジング
の周壁から排出するとともに、フロント冷却風の一部を
軸方向リヤ側に流す両側冷却構造を採用している。2. Description of the Related Art In recent years, E/G rooms have become smaller and smaller due to improvements in style and comfort, and for this reason, there has been a demand for smaller and lighter alternators for vehicles. In addition, due to the demand for extending the lifespan of vehicles, the factor of extending the lifespan has become important. In order to satisfy these demands, it has become even more important to improve the cooling function, and for this purpose, for example, Japanese Patent Publication No. 59-42546 proposes a system that uses cooling air introduced from both the front end wall and the rear end wall of the housing. A double-sided cooling structure is adopted in which centrifugal fans fixed to both ends of the field element exhaust air from the peripheral wall of the housing, and a portion of the front cooling air flows toward the rear side in the axial direction.
【０００３】0003
【発明が解決しようとする課題】上記冷却構成では確か
に冷却風量の増加に効果的であるが、上記したエンジン
ル−ムの縮小とともにエンジンの高温部材例えば排気管
などが車両用交流発電機に接近すると、この高温部材で
加熱された空気が車両用交流発電機の内部に導入された
り、ハウジングの外面特にそのリヤ側を伝熱加熱したり
、更には高温部材の放射熱によりハウジング特にそのリ
ヤ側が加熱されたりする不具合が生じ、その結果として
、ハウジングを介して車両用交流発電機の内部が過熱さ
れる不具合が生じ、樹脂や半導体のような内部部品の熱
劣化という重大な問題が生起することが判明した。[Problems to be Solved by the Invention] Although the above cooling configuration is certainly effective in increasing the amount of cooling air, as the engine room is reduced, high-temperature parts of the engine, such as the exhaust pipe, are required to be used as a vehicle alternator. When approached, the air heated by this high-temperature member is introduced into the inside of the vehicle alternator, heats the outer surface of the housing, especially its rear side, and further heats the housing, especially its rear side, due to the radiant heat of the high-temperature member. As a result, the inside of the vehicle alternator is overheated through the housing, causing serious problems such as thermal deterioration of internal parts such as resin and semiconductors. It has been found.
【０００４】0004
【発明が解決しようとする課題】本発明は、上記問題点
に鑑みなされたものであり、エンジンル−ム内の車両用
エンジンに装備するところの車両用交流発電機において
、車両用エンジンからの熱影響を軽減可能とすることを
その目的としている。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and includes a vehicle alternator installed in a vehicle engine in an engine room. The purpose is to make it possible to reduce thermal effects.
【０００５】[0005]
【課題を解決するための手段】本発明は、一端部に空気
吸い込み口を他端部に空気排出口を有し該両口を連通す
る内部空間を有するハウジングと、該ハウジングに回転
自在に嵌挿される駆動軸と、電機子コイルが巻装される
電機子鉄心を有し前記ハウジングの軸方向中央部の周壁
内面に支持される電機子と、前記駆動軸に一体回転可能
に嵌装され前記電機子に微小間隙を介して囲包される界
磁子と、前記駆動軸に固着されて前記内部空間の他端部
に収容されるとともに前記空気吸い込み口から前記空気
排出口への冷却風を生起する冷却ファンと、前記内部空
間の一端部に収容される電圧調整器及び整流装置とを備
え、車両のエンジンル−ム内の車両用エンジン前方に近
接して配設される車両用交流発電機において、前記ハウ
ジングの周壁内面と前記電機子鉄心の外周面との間を軸
方向に貫通する電機子外周側冷却通路を有することを特
徴としている。[Means for Solving the Problems] The present invention provides a housing having an air inlet at one end, an air outlet at the other end, and an internal space communicating the two ports, and a housing rotatably fitted into the housing. a drive shaft inserted therein; an armature having an armature core around which an armature coil is wound; and an armature supported on the inner surface of a circumferential wall at an axially central portion of the housing; a field element surrounded by the armature through a minute gap; a field element fixed to the drive shaft and housed in the other end of the internal space; A vehicular AC power generator is provided with a cooling fan that generates electricity, a voltage regulator and a rectifier housed in one end of the internal space, and is disposed close to the front of the vehicular engine in the engine room of the vehicle. The machine is characterized in that it has an armature outer circumferential side cooling passage that penetrates in the axial direction between the inner surface of the circumferential wall of the housing and the outer circumferential surface of the armature core.
【０００６】好適な実施態様において、前記冷却ファン
は、前記ハウジングの他端壁の後方に配設される熱遮蔽
板兼用の略円板形状のディスク部を備える遠心ファンで
あって、該遠心ファンの吸入口は、前記電機子コイルの
端部と前記ハウジングの他端壁内面との間を求心方向に
配設された求心冷却通路を経由して前記電機子外周側冷
却通路に連通している。[0006] In a preferred embodiment, the cooling fan is a centrifugal fan including a generally disc-shaped disk portion that also serves as a heat shield and is disposed behind the other end wall of the housing, the centrifugal fan The suction port communicates with the armature outer peripheral side cooling passage via a centripetal cooling passage arranged in a centripetal direction between the end of the armature coil and the inner surface of the other end wall of the housing. .
【０００７】なお本明細書では、車両の前後関係に関わ
らず、単に車両用エンジン側の方向を後方、車両用交流
発電機側の方向を前方と呼称する。In this specification, the direction toward the vehicle engine is simply referred to as the rear, and the direction toward the vehicle alternator is simply referred to as the front, regardless of the front-rear relationship of the vehicle.
【０００８】[0008]
【作用】ハウジング一端部の空気吸い込み口から内部空
間に導入された空気は整流装置及び電圧調整器を冷却し
つつ軸方向に流れて電機子及び界磁子を冷却し冷却ファ
ンによりハウジング他端部の空気排出口から排出される
。ハウジングの一端部に導入された冷却風はハウジング
の周壁内面と電機子鉄心の外周面との間の電機子外周側
冷却通路を軸方向に貫通してハウジング、電機子鉄心及
び電機子コイルを冷却する。また、ハウジングが車両用
エンジンにより加熱されても電機子外周側冷却通路の分
だけハウジングから電機子鉄心への熱輸送量が低下する
ので、電機子鉄心や電機子コイルの温度上昇が抑圧され
る。[Operation] Air introduced into the internal space from the air suction port at one end of the housing cools the rectifier and voltage regulator while flowing in the axial direction to cool the armature and field element, and is then moved by the cooling fan to the other end of the housing. is discharged from the air outlet. The cooling air introduced into one end of the housing axially passes through the armature outer cooling passage between the inner surface of the housing peripheral wall and the outer peripheral surface of the armature core to cool the housing, armature core, and armature coil. do. Additionally, even if the housing is heated by the vehicle engine, the amount of heat transferred from the housing to the armature core is reduced by the cooling passage on the outer circumferential side of the armature, so temperature increases in the armature core and armature coil are suppressed. .
【０００９】[0009]
【発明の効果】以上説明したように本発明では、ハウジ
ングの周壁内面と電機子鉄心の外周面との間の電機子外
周側冷却通路を軸方向に貫通してハウジング、電機子鉄
心及び電機子コイルを冷却する電機子外周側冷却通路を
具備しているので、近接する車両用エンジン特にその排
気管などによりハウジングが加熱されても、電機子外周
側冷却通路の分だけハウジングから電機子鉄心が隔離さ
れてハウジングから電機子鉄心への熱輸送量が低下し、
更に電機子外周側冷却通路の冷却風によりハウジング、
電機子コイル、電機子鉄心が冷却され、その結果として
、車両用エンジン特にその高温部材に近接配置されても
、発電機内部特にその樹脂部分が上記高温部材の熱によ
り劣化、老化することを軽減できるという優れた効果を
奏することができる。As explained above, in the present invention, cooling passages on the armature outer circumferential side between the inner surface of the circumferential wall of the housing and the outer circumferential surface of the armature core are penetrated in the axial direction to cool the housing, the armature core, and the armature core. Since it is equipped with a cooling passage on the armature outer circumferential side to cool the coil, even if the housing is heated by an adjacent vehicle engine, especially its exhaust pipe, the armature core will not be removed from the housing by the armature outer circumferential side cooling passage. Isolation reduces the amount of heat transported from the housing to the armature core,
Furthermore, the cooling air from the armature outer cooling passage causes the housing to
The armature coil and armature core are cooled, and as a result, even when placed close to a vehicle engine, especially its high-temperature components, the inside of the generator, especially its resin parts, is prevented from deteriorating and aging due to the heat of the high-temperature components. It can produce excellent effects.
【００１０】0010
【実施例】本発明の車両用交流発電機の一実施例を図１
に示す。この発電機は、車両のエンジンル−ム内での車
両用エンジン（図示せず）前面に配装された三相交流発
電機いわゆるオルタネ−タであって、特に車両用エンジ
ンの排気管（図示せず、本発明でいう高温部材）がこの
発電機のリヤ側に近接している。[Example] Fig. 1 shows an example of the vehicle AC generator of the present invention.
Shown below. This generator is a three-phase alternator (so-called alternator) installed in front of a vehicle engine (not shown) in the engine compartment of the vehicle, and is particularly suitable for the exhaust pipe (not shown) of the vehicle engine. A high-temperature member (not shown) in the present invention is close to the rear side of the generator.
【００１１】この発電機は、フロントハウジング１とこ
のフロントハウジング１の後端開口に接合されて内部空
間Ｓを閉成するリヤハウジング２とからなるハウジング
を有し、フロントハウジング１及びリヤハウジング２に
は駆動軸３が回転自在に支承されている。この発電機の
界磁子はブラシレス構造となっており、内部空間Ｓ内に
おいて駆動軸３に一体回転可能に嵌挿された略円筒形状
の鉄心４１と、鉄心４１の右端に固定され周方向に定間
隔で交互に配設された磁極４２、４３と、略リング形状
の鉄輪４４とを有する。この鉄輪４４は、鉄心４１の左
端部外周と磁極４２との間の径方向の隙間にこれら鉄心
４１の左端部及び磁極４２と微小間隔を隔ててフロント
ハウジング１の前端壁にボルトで固定されている。更に
、界磁子は鉄輪４４に固定されて鉄心４１に微小間隙を
隔てて固定された界磁コイル４５を有し、磁極４２、４
３はこの界磁コイル４５を微小間隙を隔てて囲包してい
る。更に説明すれば、周方向に隣接する磁極４２、４３
の間には、アルミニウム合金製造の充填部材（非磁性体
）４６が充填されて磁極４２、４３及び充填部材４６が
略円筒状に一体成形されている。そして、この充填部材
４６の内側に軸方向に界磁子内冷却通路Ｌ１が形成され
、そして、充填部材４６及び磁極４２、４３と後述する
電機子鉄心７の内周面との間に軸方向に電機子内周側冷
却通路Ｌ２が形成されている（図２及び図３参照）。This generator has a housing consisting of a front housing 1 and a rear housing 2 that is joined to the rear end opening of the front housing 1 and closes an internal space S. A drive shaft 3 is rotatably supported. The field element of this generator has a brushless structure, and includes a substantially cylindrical iron core 41 that is fitted and inserted into the drive shaft 3 so as to be integrally rotatable in the internal space S, and a substantially cylindrical iron core 41 that is fixed to the right end of the iron core 41 and extends in the circumferential direction. It has magnetic poles 42 and 43 arranged alternately at regular intervals and a substantially ring-shaped iron ring 44. This iron ring 44 is fixed to the front end wall of the front housing 1 with bolts in a radial gap between the left end outer periphery of the iron core 41 and the magnetic pole 42, with a minute gap between the left end of the iron core 41 and the magnetic pole 42. There is. Further, the field element has a field coil 45 fixed to an iron ring 44 and fixed to an iron core 41 with a minute gap, and magnetic poles 42, 4.
3 surrounds this field coil 45 with a minute gap in between. To explain further, magnetic poles 42 and 43 adjacent in the circumferential direction
A filler member (non-magnetic material) 46 made of an aluminum alloy is filled in between, and the magnetic poles 42, 43 and the filler member 46 are integrally molded into a substantially cylindrical shape. A field element cooling passage L1 is formed in the axial direction inside the filling member 46, and is axially spaced between the filling member 46, the magnetic poles 42, 43, and the inner circumferential surface of the armature core 7, which will be described later. An armature inner peripheral side cooling passage L2 is formed in the armature (see FIGS. 2 and 3).
【００１２】更に図２に示すように、充填部材４６のフ
ロント側の肩部には径方向に突設された遠心翼４７が設
けられており、この遠心翼４７は回転により空気を電機
子コイル７１に効率よく当てる機能を有する。駆動軸３
のフロントハウジング１外の前端部には車両用エンジン
（図示せず）により駆動されるプ−リ５が嵌装されてい
る。フロントハウジング１の周壁の凸部１ａの内面には
、界磁磁極４の外周側に対し径方向に微小間隙を隔てて
電機子鉄心７が嵌入されており、電機子鉄心７には電機
子コイル７１が巻装されている。なお、図７は図１のＡ
−Ａ断面であり、界磁子等は省略してある。Furthermore, as shown in FIG. 2, a centrifugal blade 47 is provided on the front shoulder of the filling member 46 and projects in the radial direction. It has the ability to efficiently hit 71 targets. Drive shaft 3
A pulley 5 driven by a vehicle engine (not shown) is fitted into the front end of the front housing 1 outside. An armature core 7 is fitted into the inner surface of the convex portion 1a of the peripheral wall of the front housing 1 with a minute gap in the radial direction from the outer circumferential side of the field magnetic pole 4. 71 is wrapped. Note that FIG. 7 is A of FIG.
-A cross section, and field elements etc. are omitted.
【００１３】駆動軸３のリヤハウジング２外の後端部に
は冷却ファン６が嵌装され、この冷却ファン６及びリヤ
ハウジング２の後端面を囲包してリヤハウジング２に樹
脂カバ−６０が嵌合され、樹脂カバ−６０の外周に空気
排出口６２が開口されている。また、リヤハウジング２
には貫通孔（本発明で言う遠心ファンの吸入口）２１が
開口されていて、貫通孔２１は樹脂カバ−６０の内部（
以下、ファン室Ｓｆという）を経由して内部空間Ｓと空
気排出口６２とを連通している。A cooling fan 6 is fitted to the rear end of the drive shaft 3 outside the rear housing 2, and a resin cover 60 is attached to the rear housing 2, surrounding the cooling fan 6 and the rear end surface of the rear housing 2. The resin cover 60 is fitted, and an air exhaust port 62 is opened on the outer periphery of the resin cover 60. In addition, rear housing 2
A through hole (intake port of a centrifugal fan in the present invention) 21 is opened in the resin cover 60.
The internal space S and the air outlet 62 are communicated via a fan chamber Sf (hereinafter referred to as fan chamber Sf).
【００１４】フロントハウジング１の前端面は、空気吸
い込みカバ−１１で囲包されており、この空気吸い込み
カバ−１１の図中、上端に開口する空気吸い込み口１２
を有している。また、フロントハウジング１には貫通孔
１３が開口されていて、貫通孔１３は空気吸い込みカバ
−１１の内部（以下、電子部品室Ｓｅという）を経由し
て空気吸い込み口１２と内部空間Ｓとを連通している。
空気吸い込みカバ−１１内には電圧調整器８及び整流装
置９が収容されている。The front end surface of the front housing 1 is surrounded by an air suction cover 11. As shown in the figure, the air suction cover 11 has an air suction port 12 that opens at the upper end.
have. Further, a through hole 13 is opened in the front housing 1, and the through hole 13 connects the air suction port 12 and the internal space S via the inside of the air suction cover 11 (hereinafter referred to as electronic component room Se). It's communicating. A voltage regulator 8 and a rectifier 9 are housed within the air suction cover 11.
【００１５】貫通孔１３と貫通孔２１とを略軸方向に連
通する上記界磁子内冷却通路Ｌ１及び電機子内周側冷却
通路Ｌ２の他に、電機子外周側冷却通路Ｌ３が形成され
ている。すなわち電機子鉄心７の外周面には軸方向に延
びる突条が周方向に定間隔で形成されており、一方、フ
ロントハウジング１の周壁内周面には軸方向に延びる条
溝が周方向に定間隔で形成されており、両者の嵌合によ
り電機子鉄心７はフロントハウジング１の内面に嵌合、
固定されている。そして、上記嵌合部を除いて電機子鉄
心７の外周面はフロントハウジング１の周壁内周面より
離れており、両者の間の空間が本発明でいう電機子外周
側冷却通路Ｌ３となっている。In addition to the field element internal cooling passage L1 and the armature inner cooling passage L2, which communicate the through hole 13 and the through hole 21 in a substantially axial direction, an armature outer cooling passage L3 is formed. There is. That is, axially extending protrusions are formed on the outer peripheral surface of the armature core 7 at regular intervals in the circumferential direction, while axially extending grooves are formed on the inner peripheral surface of the peripheral wall of the front housing 1 in the circumferential direction. They are formed at regular intervals, and when they fit together, the armature core 7 fits into the inner surface of the front housing 1.
Fixed. The outer circumferential surface of the armature core 7, except for the above-mentioned fitting portion, is separated from the inner circumferential surface of the circumferential wall of the front housing 1, and the space between the two becomes the armature outer circumferential side cooling passage L3 in the present invention. There is.
【００１６】冷却ファン６は、中心部に軸孔を有する円
板形状のディスク部６１を有し、このディスク部６１は
図１に示すように、径方向中央部において、リヤハウジ
ング２から離遠する側へ変形している。ディスク部６１
のリヤハウジング２に向かう前面６１ａの外縁部には放
射方向に遠心翼６３が固定されている。更に、駆動軸３
を支承するフロント側の球軸受け３２のベアリングボッ
クス３３には、軸受け冷却用の複数の冷却フィン３４が
設けてある。The cooling fan 6 has a disc-shaped disk portion 61 having an axial hole in the center, and as shown in FIG. It has transformed to the side that does. Disk part 61
Centrifugal blades 63 are fixed in the radial direction to the outer edge of the front surface 61a facing the rear housing 2. Furthermore, the drive shaft 3
A plurality of cooling fins 34 for cooling the bearing are provided in the bearing box 33 of the front ball bearing 32 that supports the bearing.
【００１７】したがってこの実施例では、冷却ファン６
が回転すると、空気吸い込みカバ−１１の空気吸い込み
口１２から電子部品室Ｓｅに入った冷却空気流は電圧調
整器８及び整流装置９を冷却しつつ貫通孔１３及びＣか
ら内部空間Ｓに入り、上記した界磁子内冷却通路Ｌ１、
電機子内周側冷却通路Ｌ２及び電機子外周側冷却通路Ｌ
３を通って、リヤハウジング２の貫通孔２１からファン
室Ｓｆ内の遠心翼６３の内径側に流入し、遠心翼６３で
加速されて空気排出口６２から径方向に排出される。
ここで重要な点の一つは、電機子外周側冷却通路Ｌ３
から出た冷却風が、電機子コイル７１の後側端面７３と
リヤハウジング２の後端壁前面との間の求心方向冷却通
路Ｌ４により、求心方向に一度偏向させているので、電
機子コイル７１の冷却が良好となることである。Therefore, in this embodiment, the cooling fan 6
When rotates, the cooling air flow that entered the electronic component chamber Se from the air suction port 12 of the air suction cover 11 enters the internal space S from the through holes 13 and C while cooling the voltage regulator 8 and rectifier 9. The above-mentioned field element internal cooling passage L1,
Armature inner circumference side cooling passage L2 and armature outer circumference side cooling passage L
3, flows into the inner diameter side of the centrifugal blade 63 in the fan chamber Sf from the through hole 21 of the rear housing 2, is accelerated by the centrifugal blade 63, and is discharged from the air outlet 62 in the radial direction.
One of the important points here is that the armature outer circumferential side cooling passage L3
The cooling air coming out of the armature coil 71 is once deflected in the centripetal direction by the centripetal cooling passage L4 between the rear end surface 73 of the armature coil 71 and the rear end wall front surface of the rear housing 2. cooling is improved.
【００１８】もちろん、例えば従来技術の項で説明した
ものなどのようにリヤハウジング２の周壁後端部に空気
排出口を開口すれば、遠心方向に流れる冷却風により電
機子コイル７１の後側端面７３を冷却することができる
が、このような構造であるとこの空気排出口から水など
が内部空間Ｓに直接侵入してしまい、電機子コイル７１
や界磁コイル４５を絶縁劣化させてしまう。本実施例に
よれば、電機子コイル７１の後側端面７３を径内方向へ
の冷却風により冷却しているので、リヤハウジング２の
周壁を封鎖することができ、このような害は生じない。Of course, if an air outlet is opened at the rear end of the peripheral wall of the rear housing 2 as described in the prior art section, the cooling air flowing in the centrifugal direction can cause the rear end surface of the armature coil 71 to However, with this structure, water etc. directly enters the internal space S from this air outlet, and the armature coil 71
Otherwise, the insulation of the field coil 45 will deteriorate. According to this embodiment, since the rear end surface 73 of the armature coil 71 is cooled by the cooling air in the radially inward direction, the peripheral wall of the rear housing 2 can be sealed, and such harm does not occur. .
【００１９】また、この実施例によれば、空気吸い込み
口１２と逆方向（図１の下方）に開口する空気排出口６
２からもし泥水などが飛び上がってファン室Ｓｆに侵入
しても、遠心翼６３により径外方向に弾き飛ばされるの
で貫通孔２１を通って内部空間Ｓに入ることを防止する
ことができる。更にこの実施例では、空気吸い込み口１
２も上記電子部品室Ｓｅ及び貫通孔１３を通じて内部空
間Ｓに連通する構成としているので、こちら側から融雪
塩や泥水などが内部空間Ｓに侵入して、コイル絶縁の劣
化を引き起こすことがない。According to this embodiment, the air outlet 6 opens in the opposite direction (downward in FIG. 1) to the air inlet 12.
Even if muddy water or the like jumps up from 2 and enters the fan chamber Sf, it is repelled radially outward by the centrifugal blades 63, so that it can be prevented from entering the internal space S through the through hole 21. Furthermore, in this embodiment, the air intake port 1
2 is also configured to communicate with the internal space S through the electronic component chamber Se and the through hole 13, so snowmelt salt, muddy water, etc. will not enter the internal space S from this side and cause deterioration of the coil insulation.
【００２０】なお、駆動軸３の回転と界磁コイル４５へ
の界磁電流の通電により電機子コイル７１に三相交流電
圧を発生し、それを整流装置９により整流するとともに
、電圧調整器８により界磁電流を制御して発電電圧を調
節するという作動については、従前と同じである。この
実施例の特徴を以下にまとめる。The rotation of the drive shaft 3 and the application of field current to the field coil 45 generate a three-phase AC voltage in the armature coil 71, which is rectified by the rectifier 9, and the voltage regulator 8 The operation of controlling the field current and adjusting the generated voltage is the same as before. The features of this embodiment are summarized below.
【００２１】まず第１に、この実施例では、冷却ファン
６がリヤハウジング２の後端壁後方に軸装された熱遮蔽
板兼用の略円板形状のディスク部６１と、このディスク
部６１の前面に突設された遠心翼６３とを有する構造を
採用している。このようにすれば、この車両用交流発電
機を車両用エンジンの前方に近接して配装する通常の場
合、放射乃至空気伝熱により車両用エンジンの排気パイ
プなどの高温部材から車両用交流発電機のリヤハウジン
グ２への加熱熱量が、冷却ファン６、特にそのディスク
部６１により遮断でき、リヤハウジング２からフロント
ハウジング１を介しての電機子や界磁子の加熱を大幅に
軽減できるという優れた効果を奏することができる。First of all, in this embodiment, the cooling fan 6 has a substantially disk-shaped disk portion 61 which also serves as a heat shield plate and is mounted on a shaft behind the rear end wall of the rear housing 2. A structure having centrifugal blades 63 protruding from the front surface is adopted. In this way, in the normal case where the vehicle alternator is installed close to the front of the vehicle engine, the vehicle alternating current generator can be generated from high-temperature parts such as the exhaust pipe of the vehicle engine by radiation or air heat transfer. The heating heat to the rear housing 2 of the machine can be blocked by the cooling fan 6, especially its disk portion 61, and the heating of the armature and field element from the rear housing 2 via the front housing 1 can be significantly reduced. It is possible to achieve the following effects.
【００２２】またこの実施例では、ディスク部６１の前
面に遠心翼６３を突設しているので、ディスク部６１に
冷却風通過用の開口を形成する必要がなく、上記熱遮蔽
効果を一層向上することができる。またこの実施例では
、熱伝導性が悪い樹脂カバ−６０により冷却ファン６及
びリヤハウジング２の後端壁を囲包しているので、更に
一層熱遮蔽効果を軽減することができる。もちろん、遠
心翼６３をディスク部６１の後面に設け、ディスク部６
１に冷却風通過用の開口を形成した構成を採用すること
も可能である。更に、この実施例では、上記高温部材に
よりリヤハウジング２の後端壁や冷却ファン６が多少加
熱されたとしても、冷却ファン６を通過する豊富な冷却
風によりそれらが冷却されるという利点を有する。Furthermore, in this embodiment, since the centrifugal blades 63 are protruded from the front surface of the disk portion 61, there is no need to form an opening in the disk portion 61 for passage of cooling air, and the above-mentioned heat shielding effect is further improved. can do. Further, in this embodiment, since the cooling fan 6 and the rear end wall of the rear housing 2 are surrounded by the resin cover 60 having poor thermal conductivity, the heat shielding effect can be further reduced. Of course, centrifugal blades 63 are provided on the rear surface of the disk portion 61, and the disk portion 6
It is also possible to adopt a configuration in which an opening for passage of cooling air is formed in 1. Furthermore, this embodiment has the advantage that even if the rear end wall of the rear housing 2 and the cooling fan 6 are somewhat heated by the high-temperature member, they are cooled by the abundant cooling air passing through the cooling fan 6. .
【００２３】第２に、この実施例では、フロントハウジ
ング１の周壁内面と電機子鉄心７の外周面との間を軸方
向に貫通する電機子外周側冷却通路Ｌ３を有しているの
で、この車両用交流発電機を車両用エンジンの前方に近
接して配装する通常の場合、車両用エンジンの排気パイ
プなどの高温部材からの放射乃至空気伝熱によりフロン
トハウジング１が加熱されても、電機子鉄心７は必要な
接合部を除いて電機子外周側冷却通路Ｌ３を介してフロ
ントハウジング１の周壁から隔離されているので、フロ
ントハウジング１から電機子鉄心７を介して電機子コイ
ル７１への熱伝導を低下させることができる。またこの
実施例では、上記高温部材によりたとえフロントハウジ
ング１が加熱されても、電機子鉄心７に隣接するフロン
トハウジング１の周壁は電機子外周側冷却通路Ｌ３を通
過する冷却風により冷却され、電機子鉄心７への伝熱熱
量を低減することができる。更にこの実施例では、電機
子外周側冷却通路を通過する冷却風により、上記理由に
より高温化しやすい電機子鉄心７や電機子コイル７１を
良好に冷却することができるので、それらの過熱を防止
することができる。Secondly, this embodiment has an armature outer circumferential side cooling passage L3 passing axially between the inner surface of the circumferential wall of the front housing 1 and the outer circumferential surface of the armature core 7. In the normal case where the vehicle alternator is installed close to the front of the vehicle engine, even if the front housing 1 is heated by radiation or air heat transfer from high-temperature parts such as the exhaust pipe of the vehicle engine, the electric Since the child core 7 is isolated from the peripheral wall of the front housing 1 via the armature outer circumferential side cooling passage L3 except for necessary joints, there is no flow from the front housing 1 to the armature coil 71 via the armature core 7. Heat conduction can be reduced. Furthermore, in this embodiment, even if the front housing 1 is heated by the high-temperature member, the peripheral wall of the front housing 1 adjacent to the armature core 7 is cooled by the cooling air passing through the armature outer cooling passage L3, and the electric The amount of heat transferred to the child core 7 can be reduced. Furthermore, in this embodiment, the armature core 7 and the armature coil 71, which tend to become hot due to the above reasons, can be cooled well by the cooling air passing through the armature outer circumferential side cooling passage, thereby preventing them from overheating. be able to.
【００２４】第３に、この実施例では、電機子外周側冷
却通路Ｌ３から出た冷却風を電機子コイル７１の後側端
とリヤハウジング２の後端壁内面との間を求心方向に偏
向させる求心冷却通路Ｌ４を備えているので、電機子コ
イル７１の後側端を良好に冷却することができる。なお
、この求心冷却通路Ｌ４は電機子コイル７１の後側端と
リヤハウジング２の後端壁により区画形成されるので、
特別の部材を要しない。したがって、特別の構造を採用
することなく、電機子コイル７１の後側端が良好に冷却
される。Third, in this embodiment, the cooling air coming out of the armature outer cooling passage L3 is deflected in the centripetal direction between the rear end of the armature coil 71 and the inner surface of the rear end wall of the rear housing 2. Since the centripetal cooling passage L4 is provided, the rear end of the armature coil 71 can be cooled well. Note that this centripetal cooling passage L4 is defined by the rear end of the armature coil 71 and the rear end wall of the rear housing 2;
No special parts required. Therefore, the rear end of the armature coil 71 can be cooled well without employing any special structure.
【００２５】第４に、この実施例では、電機子鉄心７は
フロントハウジング１に嵌挿され、かつ、フロントハウ
ジング１の後端開口をリヤハウジング２により密閉する
構造を採用するので、上記高温部材によりリヤハウジン
グ２が過熱されても、リヤハウジング２とフロントハウ
ジング１との境界部における熱抵抗によりフロントハウ
ジング１はリヤハウジング２よりも低温となるので、電
機子鉄心７の過熱を軽減することができる。Fourthly, in this embodiment, the armature core 7 is fitted into the front housing 1, and the rear end opening of the front housing 1 is sealed by the rear housing 2, so that the above-mentioned high-temperature member Even if the rear housing 2 is overheated due to this, the front housing 1 becomes cooler than the rear housing 2 due to thermal resistance at the boundary between the rear housing 2 and the front housing 1, so overheating of the armature core 7 can be reduced. can.
【００２６】第５に、この実施例では、界磁子の周方向
に隣接する磁極４２、４３間にアルミ合金製の充填部４
６を形成しているので、強度が向上するとともに界磁子
の放熱（冷却）面積を増加することができる。なお、こ
の充填部４６は非磁性体であれば樹脂でもよいが、金属
とすると放熱の点で特に有利である。また、この充填部
４６の内外周に沿って軸方向に冷却風の流通路を形成し
ているので、界磁子の冷却性が一層向上する。更に、充
填部４６の外周に径外方向に遠心翼４７を突設している
ので、冷却効果は更に一層向上する。Fifth, in this embodiment, a filling part 4 made of aluminum alloy is provided between the magnetic poles 42 and 43 adjacent in the circumferential direction of the field element.
6, the strength is improved and the heat dissipation (cooling) area of the field element can be increased. Note that this filling portion 46 may be made of resin as long as it is a non-magnetic material, but metal is particularly advantageous in terms of heat dissipation. Further, since cooling air flow passages are formed in the axial direction along the inner and outer peripheries of the filling portion 46, the cooling performance of the field element is further improved. Furthermore, since the centrifugal blades 47 are provided on the outer periphery of the filling portion 46 in a radially outward direction, the cooling effect is further improved.
【００２７】第６に、この実施例では、整流装置９や電
圧調整器８などの半導体素子内蔵装置をエンジンの反対
側に収容する構成を採用しているので、これら整流装置
やレギュレ−タの温度上昇を抑圧できるという効果を奏
することができる。第７に、磁極４２、４３は図３に示
すように、磁極外面４２ａ、４３ａ、磁極内面４２ｂま
で回り込んでアルミニウムで一体成形しているので、耐
遠心強度も確保されている。もちろん、樹脂で充填部材
を成形することもできる。
（他の実施例）本実施例ではブラシレス構造であったが
、図４に示すようにブラシ付きでもよい。又、図５に示
すように発電機の排熱は遠心方向へ吐出されるので、遠
心ファンの後方に他の補機類（図はバキュウムポンプ）
を同軸で組付てもよい。Sixth, this embodiment adopts a configuration in which devices with built-in semiconductor elements such as the rectifier 9 and the voltage regulator 8 are housed on the opposite side of the engine. It is possible to achieve the effect of suppressing temperature rise. Seventhly, as shown in FIG. 3, the magnetic poles 42 and 43 are integrally molded with aluminum, extending around the outer surfaces 42a and 43a of the magnetic poles and the inner surface 42b of the magnetic poles, so that centrifugal strength is also ensured. Of course, the filling member can also be molded from resin. (Other Embodiments) Although this embodiment has a brushless structure, it may also have a brush as shown in FIG. Also, as shown in Figure 5, the exhaust heat of the generator is discharged in the centrifugal direction, so other auxiliary equipment (the figure shows a vacuum pump) is installed behind the centrifugal fan.
may be assembled coaxially.
【００２８】発電機のプーリ側に熱源がある場合には図
６の様に電気部品を反プーリ側に配置し、プーリ側に遠
心ファンを配置すればよい。If the heat source is on the pulley side of the generator, the electrical components may be placed on the side opposite to the pulley as shown in FIG. 6, and the centrifugal fan may be placed on the pulley side.
【図１】本発明の一実施例を示す断面図、FIG. 1 is a sectional view showing an embodiment of the present invention;
【図２】界磁
子の部分斜視図、[Fig. 2] Partial perspective view of a field element,
【図３】界磁子の部分断面図、[Fig. 3] Partial cross-sectional view of a field element,
【図４】他の実施態様を示す断面図、FIG. 4 is a sectional view showing another embodiment;
【図５】他の実施態様を示す断面図、FIG. 5 is a sectional view showing another embodiment;
【図６】他の実施態様を示す断面図、FIG. 6 is a sectional view showing another embodiment;
【図７】図１のＡ−Ａ断面図、[Fig. 7] A-A cross-sectional view of Fig. 1;
１２は空気吸い込み口、６２は空気排出口、Ｓは内部空
間、１はフロントハウジング、２はリヤハウジング、３
は駆動軸、７１は電機子コイル、７は電機子鉄心、６は
冷却ファン、８は電圧調整器、９は整流装置、Ｌ３は電
機子外周側冷却通路、Ｌ４は求心冷却通路、６１はディ
スク部12 is an air inlet, 62 is an air outlet, S is an internal space, 1 is a front housing, 2 is a rear housing, 3
is a drive shaft, 71 is an armature coil, 7 is an armature core, 6 is a cooling fan, 8 is a voltage regulator, 9 is a rectifier, L3 is a cooling passage on the armature outer circumferential side, L4 is a centripetal cooling passage, 61 is a disk Department
Claims (2)
出口を有し該両口を連通する内部空間を有するハウジン
グと、該ハウジングに回転自在に嵌挿される駆動軸と、
電機子コイルが巻装される電機子鉄心を有し前記ハウジ
ングの軸方向中央部の周壁内面に支持される電機子と、
前記駆動軸に一体回転可能に嵌装され前記電機子に微小
間隙を介して囲包される界磁子と、前記駆動軸に固着さ
れて前記内部空間の他端部に収容されるとともに前記空
気吸い込み口から前記空気排出口への冷却風を生起する
冷却ファンと、前記内部空間の一端部に収容される電圧
調整器及び整流装置とを備え、車両のエンジンル−ム内
の車両用エンジン前方に近接して配設される車両用交流
発電機において、前記ハウジングの周壁内面と前記電機
子鉄心の外周面との間を軸方向に貫通する電機子外周側
冷却通路を有することを特徴とする車両用交流発電機。1. A housing having an air intake port at one end and an air exhaust port at the other end, and an internal space communicating the two ports, and a drive shaft rotatably fitted into the housing.
an armature that has an armature core around which an armature coil is wound and is supported on an inner surface of a circumferential wall at an axially central portion of the housing;
a field element that is integrally rotatably fitted to the drive shaft and surrounded by the armature through a minute gap; and a field element that is fixed to the drive shaft and accommodated in the other end of the internal space, and that A cooling fan that generates cooling air from the suction port to the air discharge port, and a voltage regulator and a rectifier housed in one end of the internal space, and is installed in front of the vehicle engine in the engine room of the vehicle. The alternator for a vehicle is arranged in close proximity to an armature outer circumferential side cooling passage that penetrates in the axial direction between the inner surface of the circumferential wall of the housing and the outer circumferential surface of the armature core. Vehicle alternator.
壁の後方に配設される熱遮蔽板兼用の略円板形状のディ
スク部を備える遠心ファンであって、該遠心ファンの吸
入口は、前記電機子コイルの端部と前記ハウジングの他
端壁内面との間を求心方向に配設された求心冷却通路を
経由して前記電機子外周側冷却通路に連通する請求項１
記載の車両用交流発電機。2. The cooling fan is a centrifugal fan including a substantially disc-shaped disk portion that also serves as a heat shield and is disposed behind the other end wall of the housing, and the centrifugal fan has an inlet. , wherein the end portion of the armature coil and the inner surface of the other end wall of the housing communicate with the armature outer peripheral side cooling passage via a centripetal cooling passage arranged in a centripetal direction.
The vehicle alternator described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6738691A JPH04304144A (en) | 1991-03-30 | 1991-03-30 | Ac generator for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6738691A JPH04304144A (en) | 1991-03-30 | 1991-03-30 | Ac generator for vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04304144A true JPH04304144A (en) | 1992-10-27 |
Family
ID=13343509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6738691A Pending JPH04304144A (en) | 1991-03-30 | 1991-03-30 | Ac generator for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04304144A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1176699A1 (en) * | 2000-07-26 | 2002-01-30 | Denso Corporation | Brush-less rotary electric machine having stator cooling arrangement |
| CN104769818A (en) * | 2012-09-27 | 2015-07-08 | 泽藤电机株式会社 | Generator |
-
1991
- 1991-03-30 JP JP6738691A patent/JPH04304144A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1176699A1 (en) * | 2000-07-26 | 2002-01-30 | Denso Corporation | Brush-less rotary electric machine having stator cooling arrangement |
| US6541890B2 (en) | 2000-07-26 | 2003-04-01 | Denso Corporation | Brush-less rotary electric machine having stator cooling arrangement |
| CN104769818A (en) * | 2012-09-27 | 2015-07-08 | 泽藤电机株式会社 | Generator |
| US9667116B2 (en) | 2012-09-27 | 2017-05-30 | Sawafuji Electric Co., Ltd. | Generator with brackets with positioning holes for knock pins for axial alignment of a drive shaft and a rotary shaft |
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