JP4549127B2

JP4549127B2 - Fully enclosed fan motor for vehicles

Info

Publication number: JP4549127B2
Application number: JP2004229290A
Authority: JP
Inventors: 志津雄鈴木
Original assignee: Toyo Electric Manufacturing Ltd
Current assignee: Toyo Electric Manufacturing Ltd
Priority date: 2004-08-05
Filing date: 2004-08-05
Publication date: 2010-09-22
Anticipated expiration: 2024-08-05
Also published as: JP2006050807A

Description

本発明は、電車等の鉄道車両に用いる全閉外扇電動機において、軸受温度の低下と内部空気の冷却効果を向上させた車両用全閉外扇電動機に関するものである。 The present invention relates to a fully-enclosed external fan motor for a vehicle, which is a fully-enclosed external fan motor used in a railway vehicle such as a train, and has improved bearing temperature reduction and internal air cooling effect.

従来の全閉外扇電動機は、電動機の外側に取り付けられた外部ファンからの冷却風を固定子に設けられた穴を通風することにより電動機が発生した熱を外部に放熱していた。また、電動機内部に取り付けられた内部ファンにより外気と遮断された内部の空気を電動機の外側に取り付けられている冷却器と電動機内部とを循環させ内部空気の冷却を行なっている。 A conventional fully-enclosed external fan motor radiates heat generated by the motor to the outside by blowing cooling air from an external fan attached to the outside of the motor through a hole provided in the stator. Further, the internal air, which is blocked from the outside air by an internal fan attached to the inside of the electric motor, is circulated between the cooler attached to the outside of the electric motor and the inside of the electric motor to cool the internal air.

図１０は従来の全閉外扇電動機の横断面図であり、図１１は図１０をＦから見た図である。筒状のフレーム１の内周側に、外周部に冷却穴２Ａを複数個持った固定子２を取り付ける。なお、フレーム１にはブラケット（イ）の冷却穴２Ａと一致するように排気穴１Ａが設けてある。固定子２の冷却穴２Ａが外部に出るように両側をブラケット（イ）７とブラケット（ロ）９で閉塞し、回転軸３に取り付けられた回転子４と前記固定子２の内周と僅かな隙間を持って対向し、該回転軸３はブラケット（イ）７の内周側に軸受箱１５を介して取り付けられた軸受６と、ブラケット（ロ）９の内周側に取り付けられた軸受５によって回転出来る様に支持されている。なお、軸受箱１５は軸受６を回転軸３に取り付けた状態で分解出来るように設けられている。回転軸３にはブラケット（イ）７の外側に設けられた外部ファン１０によりブラケット（イ）７に設けた通風カバー８の入気口８Ａから外気を取り込み、冷却風Ｗ１としてブラケット（イ）７に設けられた通風口７Ａから前記固定子２の冷却穴２Ａを通風してから外部へ排出される。一方、内部空気に関しては、ブラケット（ロ）９と回転子４の間に配置した内部ファン１１を回転軸３に取付け、回転子４に回転子４の両側を貫通する複数の穴４Ａを設ける。ブラケット（イ）７と固定子２により閉塞された空間はブラケット（イ）７に筒７−２とその開口部にフランジ７−１を設けてケース（イ）１３を取り付け、またブラケット（ロ）９と固定子２により閉塞された空間にはフレーム１に筒１−２とその開口部にフランジ１−１を設けてケース（ロ）１４を取り付ける。ケース（イ）１３とケース（ロ）１４との間に、冷却フィン１２−１と内部穴１２Ａから成る冷却器１２を取り付けている。このように構成した事により内部ファン１１により内部空気風Ｗ２が前述の回転子４の両側を貫通する複数の穴４Ａと冷却フィン１２−１を持った冷却器１２の穴１２Ａの間を循環し、電動機内部の熱の一部を冷却フィン１２−１により外部へ放出している。 10 is a cross-sectional view of a conventional fully-enclosed external fan motor, and FIG. 11 is a view of FIG. A stator 2 having a plurality of cooling holes 2A on the outer peripheral portion is attached to the inner peripheral side of the cylindrical frame 1. The frame 1 is provided with an exhaust hole 1A so as to coincide with the cooling hole 2A of the bracket (A). Both sides are closed with brackets (a) 7 and brackets (b) 9 so that the cooling holes 2A of the stator 2 come out, and the rotor 4 attached to the rotary shaft 3 and the inner periphery of the stator 2 are slightly The rotary shaft 3 is opposed to the bracket (A) 7 via a bearing box 15 and a bearing 6 attached to the bracket (B) 9 on the inner circumference side. 5 so that it can rotate. The bearing box 15 is provided so that it can be disassembled with the bearing 6 attached to the rotary shaft 3. External air is taken into the rotary shaft 3 from an inlet 8A of the ventilation cover 8 provided in the bracket (A) 7 by an external fan 10 provided outside the bracket (A) 7, and the bracket (A) 7 is used as cooling air W1. The cooling holes 2A of the stator 2 are ventilated from the ventilation openings 7A provided in the air and then discharged to the outside. On the other hand, with respect to the internal air, an internal fan 11 disposed between the bracket (b) 9 and the rotor 4 is attached to the rotary shaft 3, and the rotor 4 is provided with a plurality of holes 4 </ b> A penetrating both sides of the rotor 4. The space closed by the bracket (A) 7 and the stator 2 is provided with a case (A) 13 by attaching a cylinder 7-1 to the bracket (A) 7 and a flange 7-1 at the opening thereof. 9 and a space closed by the stator 2, a frame 1-2 is provided on the frame 1 and a flange 1-1 is provided at the opening thereof, and a case (b) 14 is attached. A cooler 12 including cooling fins 12-1 and internal holes 12 </ b> A is attached between the case (A) 13 and the case (B) 14. With this configuration, the internal fan 11 causes the internal air wind W2 to circulate between the plurality of holes 4A penetrating both sides of the rotor 4 and the holes 12A of the cooler 12 having the cooling fins 12-1. A part of the heat inside the motor is released to the outside by the cooling fins 12-1.

特開平９−２０５７５８JP-A-9-205758

電動機の内部空気は外気と遮断されているため高温となりやすく、軸受は一般的に熱伝導率の高い鉄等の金属で覆われているため、高温となった電動機内部の空気の熱を軸受に伝えてしまい、軸受自身が発生する熱よりもはるかに高い温度になってしまうので、電動機内部温度を高くする事が出来なかった。特に外部ファン側の軸受は周辺の空気の移動が少なく、高温となっている内部の温度が伝わり易くなっていた。一方、冷却器は冷却器内部から熱を奪い冷却フィンにより外部へ放熱するが、従来からの冷却器は冷却フィンで熱を外部へ放出する事に重点が置かれ、内部空気の熱を冷却フィン伝達させる手段については考慮されていなかった。そのため冷却効率の悪い冷却器となっていた。本発明は上記の点を鑑み、その目的の１つは軸受装置を内部温度の影響を受けにくい構造にして内部温度を高温に設定出来るようにして小型化した車両用全閉外扇電動機を提供する事にある。また、２つ目の目的は熱交換効率の高い冷却器により更に小型化した車両用全閉外扇電動機を提供する事にある。 Since the internal air of the motor is shielded from the outside air, it tends to be hot, and the bearing is generally covered with a metal such as iron with high thermal conductivity. Because the temperature is much higher than the heat generated by the bearing itself, the internal temperature of the motor could not be increased. In particular, the external fan-side bearing has little movement of ambient air, and the internal temperature, which is high, is easily transmitted. On the other hand, the cooler takes heat from the inside of the cooler and dissipates it to the outside by the cooling fin. However, the conventional cooler is focused on releasing heat to the outside by the cooling fin, and the heat of the internal air is cooled by the cooling fin. The means of transmission was not considered. Therefore, it became a cooler with poor cooling efficiency. In view of the above-mentioned points, one of the objects of the present invention is to provide a fully-enclosed external fan motor for a vehicle that is downsized so that the internal temperature can be set to a high temperature by making the bearing device less susceptible to the internal temperature. There is a thing. A second object is to provide a fully enclosed outer fan motor for a vehicle that is further miniaturized by a cooler having high heat exchange efficiency.

１．
請求項１において、
外部に取り付けられている外部ファンに固定子冷却のための冷却風を発生させる第１のベーンを奇数個取り付け、ブラケットの内周部に取り付けられた軸受装置と対向する位置に第２のベーンを奇数個取付け第２のベーン間に穴を設ける。更にブラケットの内周部に取り付けられた軸受装置の回転子側に該軸受装置と回転子との間に空間が出来る様にカバーを設け、該空間とブラケットと外部ファンとの間の空間を連結する穴を前記第２のベーン間に設けた穴のピッチ円に近傍したピッチ円上に遇数個設けるか、あるいは第２のベーン間に設けた穴の数とブラケットに設けた穴の数を一致させないように構成する。この様に構成した事により軸が回転すると、外部ファンの穴とブラケットの穴同士が一致する場所と一致しない場所が同時に出現するので、各穴周辺の圧力に差が生じて前記カバーによって出来ている空間に空気の流れが発生し、該空間にある空気を入れ替えることが出来るので軸受は内部温度の影響を受けにくくなる。
一方、該軸受と反対側に取り付けられている軸受に関しては、ブラケットの外部に設けた外部ファンにより発生した冷却風の排気側に在るブラケットの内周部に取り付けられた軸受装置と内部に在る内部ファンとの間に空間が出来る様にカバーを設け、該空間とブラケットの外側とを連結する穴をブラケットに複数個設ける。更にその１ないし数箇所の穴をダクトにより固定子の冷却穴の出口とを連結する。これにより外部ファンにより発生した冷却風の一部が前記空間に通流されるので該空間にある空気を入れ替えることが出来る。その結果、軸受は内部温度の影響を受けにくくなる。 1.
In claim 1,
An odd number of first vanes for generating cooling air for cooling the stator are attached to an external fan attached to the outside, and the second vane is placed at a position facing the bearing device attached to the inner periphery of the bracket. An odd number of holes are provided between the second vanes. Furthermore, a cover is provided on the rotor side of the bearing device attached to the inner periphery of the bracket so that a space is formed between the bearing device and the rotor, and the space between the space and the bracket and the external fan is connected. A number of holes to be provided on the pitch circle adjacent to the pitch circle of the holes provided between the second vanes, or the number of holes provided between the second vanes and the number of holes provided in the bracket. Configure not to match. With this configuration, when the shaft rotates, a place where the hole of the external fan and the hole of the bracket do not match and a place where they do not match appear at the same time. Since the air flow is generated in the existing space and the air in the space can be replaced, the bearing is not easily affected by the internal temperature.
On the other hand, with respect to the bearing attached to the opposite side of the bearing, there is a bearing device attached to the inner peripheral portion of the bracket on the exhaust side of the cooling air generated by the external fan provided outside the bracket and the inside thereof. A cover is provided so as to create a space between the internal fan and a plurality of holes for connecting the space and the outside of the bracket. Further, one or several holes are connected to the cooling hole outlet of the stator by a duct. As a result, part of the cooling air generated by the external fan is passed through the space, so that the air in the space can be replaced. As a result, the bearing is less susceptible to the internal temperature.

２．請求項２において、
請求項１において外部ファンの第２のベーンの間に設けた穴の円周方向の穴ピッチを不等ピッチにするかブラケット（イ）に設けたカバー（イ）による空間と外部ファンとの間の空間を連結する穴の円周方向の穴ピッチを不等ピッチにするか、または、その両方の穴数が一致しない様にする。これにより外部フアンが回転すると穴同士が一致する場所と一致しない場所が同時に出現するので請求項１と同様の効果が得られる。 2. In claim 2,
2. The space between the external fan and the space formed by the cover (A) provided in the bracket (A) or the pitch of the holes provided between the second vanes of the external fan in the circumferential direction is set to an unequal pitch. The hole pitches in the circumferential direction of the holes connecting the two spaces are set to unequal pitches, or the number of holes in the both is not matched. As a result, when the external fan rotates, a place where the holes match and a place where the holes do not match appear at the same time, so the same effect as in the first aspect can be obtained.

３．請求項３において、
請求項１において、ブラケットの外部に設けた外部ファンにより発生した冷却風の排気側に在るブラケットの内周部に取り付けられた軸受装置の回転子側と内部に在る内部ファンとの間に空間が出来る様にカバーを取付け、該空間と前記ブラケットの外側とを連結する穴を複数個設けるとともに、該ブラケットの外側の側面に複数個の冷却フィンを放射状に取り付け、固定子の冷却穴の出口と該ブラケットの冷却フィンを覆う様に風洞を設け、該風洞の開口部を回転軸に対向して設ける。更に該開口部の一部が前述のブラケットの穴を１ないし数箇所をダクトで連結するように構成して、冷却風によりブラケットの冷却フィンから内部の熱を取ると同時に、前記空間にある空気を入れ替えることが出来る。これにより、電動機内部の温度を下げる事が出来ると同時に、軸受は内部温度の影響を受けにくくなる。 3. In claim 3,
In Claim 1, Between the rotor side of the bearing apparatus attached to the inner peripheral part of the bracket which exists in the exhaust air side of the cooling air generated with the external fan provided in the exterior of the bracket, and the internal fan in the inside A cover is attached so that a space is formed, a plurality of holes for connecting the space and the outside of the bracket are provided, and a plurality of cooling fins are radially attached to the outer side surface of the bracket, so that the cooling holes of the stator are formed. A wind tunnel is provided so as to cover the outlet and the cooling fin of the bracket, and an opening of the wind tunnel is provided to face the rotation shaft. Further, a part of the opening is configured so that one or several places of the holes of the bracket are connected by a duct so that internal air is taken from the cooling fins of the bracket by cooling air, and at the same time, the air in the space Can be replaced. As a result, the temperature inside the electric motor can be lowered, and at the same time, the bearing is hardly affected by the internal temperature.

４．請求項４において
請求項１の冷却器の内部に複数個の長方形の穴を配列し、該長方形の穴の長辺を配列された穴数の少ないほうに配置させ、外周部に複数個のフィンを取り付けたものである。これにより内部空気の集熱が向上する。 4). 5. A plurality of rectangular holes are arranged inside the cooler according to claim 1, and the long sides of the rectangular holes are arranged in the smaller number of arranged holes, and a plurality of fins are arranged on the outer peripheral portion. Is attached. Thereby, the heat collection of internal air improves.

５．請求項５において
請求項４の冷却器をフィンに相当する部分に大きな外形の平板を配置し、外形の大きな平板間には外形の小さな平板を配置する。それぞれの平板には複数個の長方形の穴を設け、該長方形の穴の大きさが大小２種類交互に組合わさるように平板を配置し、ねじで一体化し請求項５に対して更に集熱を向上させた。 5). In claim 5, the cooler according to claim 4 is provided with a large outer flat plate in a portion corresponding to the fin, and a small outer flat plate is disposed between the large outer flat plates. 6. A plurality of rectangular holes are provided in each flat plate, the flat plates are arranged so that the sizes of the rectangular holes are alternately combined in two sizes, and integrated with screws to further collect heat with respect to claim 5. Improved.

６．請求項６において
請求項５の長方形の穴の大きさを同じにして、一体化するねじの取付穴位置と長方形の穴との位置とを若干ずらし、隣り合う平板どうしの長方形の穴がずれる様に配置し、ねじにて一体化し部品点数を減らして請求項５と同等の集熱効果を持たせた。 6). In claim 6, the rectangular holes of claim 5 are made the same size, and the positions of the mounting holes of the screws to be integrated and the positions of the rectangular holes are slightly shifted so that the rectangular holes of adjacent flat plates are displaced. And integrated with a screw to reduce the number of parts, so that a heat collecting effect equivalent to that of claim 5 is obtained.

本発明によれば、内部温度の影響を受けない軸受構造と電動機内部の密閉された空気を効率よく冷却出来るので、小型化された大容量の車両用全閉外扇電動機が提供できる。 According to the present invention, the bearing structure that is not affected by the internal temperature and the sealed air inside the electric motor can be efficiently cooled, so that it is possible to provide a miniaturized, large-capacity fully-enclosed external fan motor for vehicles.

以下、本発明の実施の形態を図１〜図９に基づいて説明する。 Hereinafter, embodiments of the present invention will be described with reference to FIGS.

図１は本発明の請求項１による全閉外扇電動機の横断面図であり、図２は図１をＡから見た図で、図３は図１のＢ−Ｂ断面図、図４は図１をＣから見た図である。筒状のフレーム１の内周側に、外周部に冷却穴２Ａを複数個持った固定子２を取り付ける。なお、フレーム１にはブラケット（イ）７の冷却穴２Ａと一致するように排気穴１Ａが設けてある。固定子２の冷却穴２Ａが外部に出るように両側をブラケット（イ）７とブラケット（ロ）９で閉塞し、回転軸３に取り付けられた回転子４と前記固定子２の内周と僅かな隙間を持って対向し、該回転軸３はブラケット（イ）７の内周側に軸受箱１５を介して取り付けられた軸受６と、ブラケット（ロ）９の内周側に取り付けられた軸受５によって回転出来る様に支持している。なお、軸受箱１５は軸受６を回転軸３に取り付けた状態で分解出来るように設けている。回転軸３にはブラケット（イ）７の外側に設けられた外部ファン１０によりブラケット（イ）７に設けた通風カバー８の入気口８Ａから外気を取り込み、冷却風Ｗ１としてブラケット（イ）７に設けられた通風口７Ａから前記固定子２の冷却穴２Ａを通風してから外部へ排出する。 1 is a cross-sectional view of a fully-enclosed external fan motor according to claim 1 of the present invention, FIG. 2 is a view of FIG. 1 as viewed from A, FIG. 3 is a cross-sectional view taken along the line BB in FIG. It is the figure which looked at 1 from C. A stator 2 having a plurality of cooling holes 2A on the outer peripheral portion is attached to the inner peripheral side of the cylindrical frame 1. The frame 1 is provided with an exhaust hole 1A so as to coincide with the cooling hole 2A of the bracket (A) 7. Both sides are closed with brackets (a) 7 and brackets (b) 9 so that the cooling holes 2A of the stator 2 come out, and the rotor 4 attached to the rotary shaft 3 and the inner periphery of the stator 2 are slightly The rotary shaft 3 is opposed to the bracket (A) 7 via a bearing box 15 and a bearing 6 attached to the bracket (B) 9 on the inner circumference side. 5 so that it can be rotated. The bearing box 15 is provided so that it can be disassembled with the bearing 6 attached to the rotary shaft 3. External air is taken into the rotary shaft 3 from an inlet 8A of the ventilation cover 8 provided in the bracket (A) 7 by an external fan 10 provided outside the bracket (A) 7, and the bracket (A) 7 is used as cooling air W1. The cooling holes 2A of the stator 2 are ventilated from the ventilation openings 7A provided in the air and then discharged to the outside.

回転軸３に取付けた外部ファン１０の外周側には冷却風Ｗ１を発生させるための第１のベーン１０−１を奇数個設け、さらにブラケット（イ）７の内周部に取り付けた軸受箱１５と対向する位置に第２のベーン１０−２を奇数個取り付けるとともに、第２のベーン１０−２の間に穴１０Ａを設け、更にブラケット（イ）７の内周部に取り付けた軸受箱１５の回転子側に回転子４との間に空間が出来る様にカバー（イ）１７を取付け、該空間とブラケット（イ）７と外部ファン１０との間の空間を連結するため、ブラケット（イ）７に穴７Ｂと軸受箱１５に穴１５Ａを前記第２のベーン１０−２の間に設けた穴１０Ａのピッチ円に近傍したピッチ円上に遇数個設けるか、あるいは外部ファン１０の第２のベーン１０−２の間に設けた穴１０Ａの数とブラケット（イ）７と外部ファン１０との間の空間を連結するブラケット（イ）７の穴７Ｂおよび軸受箱１５の穴１５Ａの数を一致させないで構成する。
この様に構成した事により回転軸３を回転させると、ファン１０の第１のベーン１０−１により冷却風Ｗ１が発生するとともに、外部ファン１０の穴１０Ａとブラケット（イ）７の穴７Ｂとが一致する場所と一致しない場所が外部ファン１０の回転中に同時に出現するので、穴７Ｂの周辺の圧力に差が生じて前記カバー（イ）１８によって出来ている空間に空気の流れＷ３が発生し、該空間にある空気を入れ替えることが出来るので、軸受６は内部温度の影響を受けにくくなる。 An odd number of first vanes 10-1 for generating cooling air W1 are provided on the outer peripheral side of the external fan 10 attached to the rotating shaft 3, and a bearing box 15 attached to the inner peripheral portion of the bracket (a) 7 is provided. An odd number of second vanes 10-2 are attached at positions opposite to each other, a hole 10A is provided between the second vanes 10-2, and a bearing box 15 attached to the inner peripheral portion of the bracket (a) 7 is provided. A cover (A) 17 is attached so that a space is formed between the rotor 4 and the rotor 4, and the space between the bracket (A) 7 and the external fan 10 is connected to the bracket (A). 7 are provided on the pitch circle adjacent to the pitch circle of the hole 10A provided between the second vanes 10-2, or the second hole of the external fan 10 is provided. Of the hole 10A provided between the vanes 10-2 And configure without to match the number of holes 15A of the bracket (b) 7 holes 7B and bearing housing 15 for connecting the space between the bracket (b) 7 and an external fan 10.
When the rotating shaft 3 is rotated by this configuration, the cooling vane W1 is generated by the first vane 10-1 of the fan 10, and the hole 10A of the external fan 10 and the hole 7B of the bracket (A) 7 Since the places where the two coincide with each other appear simultaneously during the rotation of the external fan 10, a difference occurs in the pressure around the hole 7 B, and the air flow W 3 is generated in the space formed by the cover (A) 18. And since the air in this space can be replaced, the bearing 6 becomes difficult to be influenced by the internal temperature.

他方の軸受５に対しては、ブラケット（ロ）９の内周部の回転子４側との間に配置した内部ファン１１を回転軸３に取付け、内部ファン１１との間に空間が出来る様にカバー（ロ）１７を取付け、該空間とブラケット（ロ）９の外側とを連結する穴９Ａを複数個と下部には大き目の穴９Ｂを設け、冷却風Ｗ１の出口であるフレーム１の排気穴１Ａに風洞１６を設け、該風洞１６の開口部とブラケット（ロ）９に設けた穴９Ａの１ないし数箇所を前記風洞１６とダクト１６−１で連結する。この様に構成した事により外部ファン１０にて発生した冷却風Ｗ１の一部の冷却風Ｗ１ａがダクト１６−１を通り、前記カバー（ロ）１７と軸受５の間の空間に入りダクト１６−１と連結していないブラケット（ロ）９の穴９Ａと穴９Ｂから外気へ排出されるため該空間に空気の流れが発生し、該空間にある空気を入れ替えることが出来るので軸受５は内部温度の影響を受けにくくなる。なお穴９Ｂは該空間にゴミや異物が入った時に出易くするため穴９Ａより大きな穴にしている。 For the other bearing 5, an internal fan 11 disposed between the inner periphery of the bracket (b) 9 and the rotor 4 side is attached to the rotary shaft 3 so that a space is formed between the internal fan 11. A cover (b) 17 is attached to the frame, a plurality of holes 9A for connecting the space and the outside of the bracket (b) 9 are provided, and a large hole 9B is provided in the lower part, and the exhaust of the frame 1 serving as an outlet for the cooling air W1 is provided. A wind tunnel 16 is provided in the hole 1A, and one or several holes 9A provided in the opening of the wind tunnel 16 and the bracket (b) 9 are connected by the wind tunnel 16 and the duct 16-1. With this configuration, a part of the cooling air W1a generated by the external fan 10 passes through the duct 16-1, enters the space between the cover (b) 17 and the bearing 5, and the duct 16- Since the air is discharged to the outside air from the holes 9A and 9B of the bracket (b) 9 which is not connected to the bearing 1, the air flows in the space and the air in the space can be replaced. It becomes difficult to be affected. The hole 9B is made larger than the hole 9A so that it can be easily removed when dust or foreign matter enters the space.

また、電動機内部の空気を循環させるため、回転軸３に取り付けられている回転子４の両側を貫通する複数の穴４Ａを設け、ブラケット（イ）７と固定子２により閉塞された空間にはブラケット（イ）７に筒７−２とその開口部にフランジ７−１を設けてケース（イ）１３を取り付ける。ブラケット（ロ）９と固定子２により閉塞された空間にはフレーム１に筒１−２とその開口部にフランジ１−１を設けてケース（ロ）１４を取り付ける。ケース（イ）１３とケース（ロ）１４との間に冷却器１２を取り付ける。冷却器１２は外周部に冷却フィン１２−１を取り付け、該冷却器１２の内部には複数個の長方形の穴１２Ｂを配列し、該長方形の穴１２Ｂの長辺を配列された穴数の少ないほうに配置させ、外周部に複数個のフィンを取り付けたものである。なお、長方形の穴１２Ｂの形状を正方形にしても良い。更に長方形の穴１２Ｂの縦と横の比が小さい場合は長方形の穴１２Ｂの長辺を配列された穴数の少ないほうに配置しなくても良い。
このように構成した事により、内部ファン１１により内部空気風Ｗ２が前述の回転子４の両側を貫通する複数の穴４Ａから熱を吸収し、冷却器１２の穴１２Ｂを通過した時に冷却器１２に効率よく熱を伝達し、冷却フィン１２−１から外部へ熱が放出される。 Further, in order to circulate the air inside the electric motor, a plurality of holes 4A that penetrates both sides of the rotor 4 attached to the rotary shaft 3 are provided, and the space closed by the bracket (A) 7 and the stator 2 is provided. A bracket (A) 7 is provided with a cylinder 7-2 and a flange 7-1 provided at the opening thereof, and a case (A) 13 is attached. In a space closed by the bracket (b) 9 and the stator 2, a cylinder 1-2 is provided on the frame 1 and a flange 1-1 is provided at the opening thereof, and a case (b) 14 is attached. The cooler 12 is attached between the case (A) 13 and the case (B) 14. The cooler 12 has cooling fins 12-1 attached to the outer peripheral portion, and a plurality of rectangular holes 12B are arranged inside the cooler 12, and the number of holes in which the long sides of the rectangular holes 12B are arranged is small. And a plurality of fins attached to the outer peripheral portion. The rectangular hole 12B may have a square shape. Furthermore, when the ratio of the vertical and horizontal dimensions of the rectangular hole 12B is small, the long side of the rectangular hole 12B may not be arranged on the side having the smaller number of holes arranged.
With this configuration, the internal fan 11 absorbs heat from the plurality of holes 4A penetrating both sides of the rotor 4 by the internal fan 11 and passes through the holes 12B of the cooler 12 so that the cooler 12 Heat is efficiently transferred to the cooling fin 12-1, and the heat is released to the outside.

図５は軸受５の冷却方法の他の実施例の横断面図で図６は図５をＤから見た図である。ブラケット（ロ）９の外側の側面に複数個の冷却フィン９−１を放射状に取り付け、ブラケット（ロ）９の外側とを連結する穴９Ａを複数個と下部には大き目の穴９Ｂを設け、冷却風Ｗ１の出口であるフレーム１の排気穴１Ａと該ブラケット（ロ）９の冷却フィン９−１を覆う様に風洞１６を設け、該風洞１６の開口部が回転軸３に対向して設ける。更に該開口部の一部が前述のブラケット（ロ）９の穴９Ａの１ないし数箇所をダクト１６−１で連結するように構成して、冷却風Ｗ１の一部の冷却風Ｗ１ａがダクト１６−１を通り、前記カバー（ロ）１７と軸受５の間の空間に入りダクト１６−１と連結していないブラケット（ロ）９の穴９Ａと穴９Ｂから外気へ排出されるため、該空間に空気の流れが発生し該空間にある空気を入れ替えることが出来るので、軸受５は内部温度の影響を受けにくくなる。また、ブラケット（ロ）９に冷却フィン９−１を取り付けた事により冷却風Ｗ１により、さらに効率的に電動機内部に発生した熱を取る事が出来る。 FIG. 5 is a cross-sectional view of another embodiment of the method for cooling the bearing 5, and FIG. 6 is a view of FIG. A plurality of cooling fins 9-1 are radially attached to the outer side surface of the bracket (b) 9, a plurality of holes 9A for connecting the outer side of the bracket (b) 9 and a larger hole 9B are provided at the bottom, A wind tunnel 16 is provided so as to cover the exhaust hole 1A of the frame 1 which is the outlet of the cooling air W1 and the cooling fins 9-1 of the bracket (b) 9, and the opening of the wind tunnel 16 is provided to face the rotating shaft 3. . Further, a part of the opening is configured to connect one or several holes 9A of the bracket (b) 9 with the duct 16-1, so that a part of the cooling air W1 is converted into the duct 16. -1 through the hole 9A and the hole 9B of the bracket (b) 9 that enters the space between the cover (b) 17 and the bearing 5 and is not connected to the duct 16-1, the space is discharged. Therefore, the bearing 5 is less susceptible to the influence of the internal temperature. Further, since the cooling fins 9-1 are attached to the bracket (b) 9, the heat generated inside the electric motor can be taken out more efficiently by the cooling air W1.

図７は冷却器の他の実施例の横断面図で、図８はそのＥ−Ｅ断面図である。
冷却器１２をフィンに相当する部分に外形の大きな平板１２−２を配置し、平板１２−２の間に外形の小さな平板１２−３と平板１２−４を配置する。平板１２−３に複数個の長方形の穴１２Ｂを設け、平板１２−２と平板１２−４には複数個の穴１２Ｂより大き目の長方形の穴１２Ｃを設ける。これらの平板を例えば平板１２−３、平板１２−４、平板１２−３、平板１２−２の順に配置し、ねじ１９で一体化すると、冷却器内部の穴の大きさが異なる大小２種類の長方形の穴が交互に組合わされた冷却器１２が出来るので、電動機内部の熱を更に効率よく伝達する事が出来る。なお、外形の大きな平板１２−２の間に外形の小さな平板３枚を配置したが、外形の小さな平板の枚数の制限は無く、冷却器１２の内部の穴に凹凸をつける事が重要である。 FIG. 7 is a cross-sectional view of another embodiment of the cooler, and FIG. 8 is an EE cross-sectional view thereof.
A flat plate 12-2 having a large outer shape is arranged in a portion corresponding to the fin of the cooler 12, and a flat plate 12-3 and a flat plate 12-4 having a small outer shape are arranged between the flat plates 12-2. The flat plate 12-3 is provided with a plurality of rectangular holes 12B, and the flat plate 12-2 and the flat plate 12-4 are provided with rectangular holes 12C larger than the plurality of holes 12B. When these flat plates are arranged in the order of, for example, the flat plate 12-3, the flat plate 12-4, the flat plate 12-3, and the flat plate 12-2, and integrated with the screw 19, there are two types of large and small holes with different sizes in the cooler. Since the cooler 12 in which the rectangular holes are alternately combined is formed, the heat inside the electric motor can be more efficiently transferred. In addition, although three flat plates having a small outer shape are arranged between the flat plates 12-2 having a large outer shape, there is no limitation on the number of flat plates having a small outer shape, and it is important to make the holes in the cooler 12 uneven. .

図９は冷却器の他の実施例の縦断面図で、冷却器１２をフィンに相当する部分に大きな外形の平板１２−２を配置し、平板１２−２の間に平板１２−３を複数枚配置している。平板１２−２と平板１２−３の長方形の穴１２Ｂの大きさを同じにして、一体化するねじ１９の取付穴位置と長方形の穴１２Ｂとの位置とをＸ１＞Ｘ２、Ｙ１＞Ｙ２の如く若干ずらして、隣り合う平板どうしの長方形の穴１２Ｂがずれる様に配置し、ねじ１９にて一体化し部品点数を減らして前記冷却器と同等の集熱効果を持たせた冷却器が出来る。なお、外形の大きな平板１２−２の間に外形の小さな平板３枚を配置したが、外形の小さな平板の枚数の制限は無く、冷却器１２の内部の穴に凹凸をつける事が重要である。 FIG. 9 is a longitudinal sectional view of another embodiment of the cooler, in which the cooler 12 is provided with a large-sized flat plate 12-2 in a portion corresponding to a fin, and a plurality of flat plates 12-3 are arranged between the flat plates 12-2. It is arranged. The sizes of the rectangular holes 12B of the flat plate 12-2 and the flat plate 12-3 are the same, and the positions of the mounting holes of the screws 19 to be integrated and the positions of the rectangular holes 12B are as follows: X1> X2, Y1> Y2. A cooler having a heat collecting effect equivalent to that of the cooler can be obtained by slightly shifting and arranging so that the rectangular holes 12B of adjacent flat plates are displaced and integrated by screws 19 to reduce the number of parts. In addition, although three flat plates having a small outer shape are arranged between the flat plates 12-2 having a large outer shape, there is no limitation on the number of flat plates having a small outer shape, and it is important to make the holes in the cooler 12 uneven. .

本発明による軸受構造は一般産業用全閉外扇電動機にも利用出来る。 The bearing structure according to the present invention can also be used for a general industrial fully enclosed outer fan motor.

本発明の一実施例の横断面図を示した図である。It is the figure which showed the cross-sectional view of one Example of this invention. 図１をＡから見た図である。It is the figure which looked at FIG. 1 from A. 図１のＢ−Ｂ断面図である。It is BB sectional drawing of FIG. 図１をＣから見た図である。It is the figure which looked at FIG. 1 from C. 本発明による他の実施例の横断面図を示した図である。It is the figure which showed the cross-sectional view of the other Example by this invention. 図５をＤから見た図である。It is the figure which looked at FIG. 5 from D. FIG. 冷却器の他の実施例を示した横断面図である。It is the cross-sectional view which showed the other Example of the cooler. 図７のＥ−Ｅ断面図である。It is EE sectional drawing of FIG. 冷却器の他の実施例を示した縦断面図である。It is the longitudinal cross-sectional view which showed the other Example of the cooler. 従来の全閉外扇電動機の一実施例を示した横断面図である。It is the cross-sectional view which showed one Example of the conventional fully enclosed external fan motor. 図１０をＦから見た図である。It is the figure which looked at FIG. 10 from F. FIG.

Explanation of symbols

１フレーム、１Ａ排気穴、１−１フランジ、１−２筒
２固定子、２Ａ冷却穴
３回転軸
４回転子、４Ａ穴
５軸受
６軸受
７ブラケット（イ）、７Ａ通風口、７Ｂ穴、
７−１フランジ、７−２筒
８通風カバー、８Ａ入気口
９ブラケット（ロ）、９Ａ穴、９Ｂ穴
１０外部ファン、１０Ａ穴、１０−１第１のベーン
１０−２第２のベーン
１１内部ファン
１２冷却器、１２Ａ穴、１２Ｂ穴、１２Ｃ穴
１２−１冷却フィン、１２−２平板、１２−３平板
１２−４平板
１３ケース（イ）
１４ケース（ロ）
１５軸受箱、１５Ａ穴
１６風洞、１６−１ダクト
１７カバー（ロ）
１８カバー（イ）
１９ねじ
Ｗ１冷却風、Ｗ１ａ冷却風
Ｗ２内部空気風
Ｗ３空気の流れ 1 frame, 1A exhaust hole, 1-1 flange, 1-2 cylinder 2 stator, 2A cooling hole 3 rotating shaft 4 rotor, 4A hole
5 Bearing 6 Bearing 7 Bracket (A), 7A Ventilation opening, 7B hole,
7-1 Flange, 7-2 Tube 8 Ventilation cover, 8A Air inlet 9 Bracket (b), 9A hole, 9B hole 10 External fan, 10A hole, 10-1 1st vane 10-2 2nd vane 11 Internal fan 12 Cooler, 12A hole, 12B hole, 12C hole 12-1 Cooling fin, 12-2 Flat plate, 12-3 Flat plate 12-4 Flat plate 13 Case (A)
14 Case (b)
15 Bearing box, 15A hole 16 wind tunnel, 16-1 duct 17 cover (b)
18 Cover (I)
19 Screw W1 Cooling air, W1a Cooling air W2 Internal air air W3 Air flow

Claims

Attach a stator with multiple cooling holes to the inner periphery of the cylindrical frame, and close both sides with brackets (a) and brackets (b) so that the stator cooling holes come out. The rotor attached to the rotating shaft is opposed to the inner periphery of the stator with a slight gap, and the outer shaft of the bearing is placed on the inner peripheral side of each of the bracket (b) and the bracket (b). It is supported so that it can be rotated by a fixed bearing device, and an external fan provided outside the bracket (A) of the rotating shaft takes in cooling air from outside air through an inlet port provided in the bracket (A). The cooling air is exhausted after the cooling holes of the stator are passed through the ventilation holes provided in b), and an internal fan disposed between the bracket (b) and the rotor is attached to the rotating shaft, and the rotor is Holes through both sides of the Take out the cylinder from both sides closed by brackets (a) and brackets (b) and the stator on both sides, and install a cooler consisting of a cylinder with cooling fins attached between the openings of the cylinders In the fully-enclosed external fan motor for a vehicle, in which the internal air can be circulated between the plurality of holes penetrating both sides of the rotor and the cylinder having the cooling fin by the internal fan.
An odd number of first vanes are provided at positions where the external fan faces the ventilation opening of the bracket (A), and an odd number of second vanes is provided at a position facing the bearing device attached to the inner peripheral portion of the bracket (A). A first hole is provided between the second vanes, and a first hole is provided between the bearing device and the rotor on the rotor side of the bearing device attached to the inner peripheral portion of the bracket (a) . space mounting the cover (b) as can, provided the second hole connecting the second space between the first space and the external fan and the bracket (b) between the second vane if the first providing several even-on pitch circle which is near to the pitch circle of the hole, or external to the first hole number and the first space and the bracket provided between the second vane external fan (b) Configuration without matching the number of second holes connecting the second space with the fan While, attach the other bracket (ii) the third as the space can be covered between the inner rotor side and the internal fan of the bearing device which is attached to the peripheral portion of the (b), said third space And a plurality of third holes for connecting the outside of the bracket (b) to the bracket (b), and one or several third holes are connected to the outlet of the cooling hole of the stator by a duct. Fully enclosed external fan motor.

2. The bearing device according to claim 1, wherein the first holes provided between the second vanes of the external fan have an irregular pitch in the circumferential direction or are attached to the inner peripheral portion of the bracket (a). A cover (A) is attached to the rotor side so that the first space is formed between the bearing device and the rotor, and the first space, the bracket (A), and the external fan are connected to each other . A fully-enclosed external fan motor for a vehicle configured such that the circumferential pitch of the second holes connecting the two spaces is made unequal, or the numbers of both holes are not matched.

The cover (b) is attached to the bracket (b) so that the third space is formed between the bearing device attached to the inner periphery of the bracket (b) and the internal fan . A plurality of third holes for connecting the space of the bracket and the outside of the bracket (B), and a plurality of cooling fins are radially attached to the outer side surface of the bracket (B), thereby exiting the cooling hole of the stator. A wind tunnel is provided so as to cover the cooling fins of the bracket (b), the opening of the wind tunnel faces the rotating shaft, and a part of the opening defines the third hole of the bracket (b). A fully-enclosed external fan motor for vehicles that is connected by several ducts.

2. The cooler according to claim 1, wherein a plurality of rectangular holes are arranged inside the cooler, and the long sides of the rectangular holes are arranged on the side having the smaller number of holes arranged, and a plurality of fins are arranged on the outer peripheral portion. Fitted with a cooler.

In the cooler of claim 4, arranged a large flat profile in a portion corresponding to the fin, between large flat of the outer shape is arranged a small flat outer shape, the holes of the plurality of the rectangle in each of the flat plate the provided, the size of the rectangular hole is large and small two types available, large and small two kinds of the rectangular hole is arranged flat so at combinations alternately cooler integrated by screws.

In the same size of the hole of the rectangle in claim 5, slightly shifted with mounting hole positions of the integrated screw and the position of said rectangular holes, as said rectangular hole of each other adjacent flat deviated A cooler that is arranged and integrated with screws.