JPS6036696B2 - rotating electric machine - Google Patents

Description

【発明の詳細な説明】 本発明は液体冷却固定子を備えた回転電機に関する。[Detailed description of the invention] The present invention relates to a rotating electrical machine equipped with a liquid-cooled stator.

従来例えばガスタービンで駆動する発電機は最高回転速
度が毎分数万回転にも達するものがある。Conventionally, for example, some generators driven by gas turbines have a maximum rotational speed of tens of thousands of revolutions per minute.

そしてこのような回転電機を冷却するのに固定子および
回転子共に冷却液に浸債すると回転子に接する冷却液の
摩擦損失が大きい欠点があり、また同期機の場合は回転
子の集電装置を冷却液中に置くことが困難であるという
欠点がある。そこでキヤンドモータとして知られている
ように固定子鉄心の回転子との空隙面を非磁性金属板の
キャンで被って線輪を巻装した固定子鉄心を密封して、
この中に冷却液を通して冷却することが考えられるが、
キャンは製作技術上ある程度の厚さを持たせねばならな
いので、空隙長が長くなり、また金属であるから高速時
には著しく大さいうず電流損を生じて効率を悪くすると
共に高温となって運転不可能にもなる欠点があった。ま
た線輪導体を中空にして通液することも考えられるが小
容量機には高価になって不向きである。また、鉄心の空
隙面をガラスベーパあるいはガラスクロスのような布状
絶縁部材または薄円筒状絶縁部材にェポキシあるいはポ
リィミド等の樹脂を塗り、熱硬化させ、鉄心内面にはり
つける事により、かなり薄いしやへし・層を形成するこ
とも出来る。In order to cool such a rotating electric machine, if both the stator and rotor are immersed in coolant, there is a drawback that the friction loss of the coolant in contact with the rotor is large, and in the case of a synchronous machine, the rotor's current collector The disadvantage is that it is difficult to place the Therefore, in what is known as a canned motor, the gap surface between the stator core and the rotor is covered with a non-magnetic metal plate can, and the stator core wrapped with wire is sealed.
It is conceivable to cool it by passing a coolant through it, but
Because the can must have a certain thickness due to manufacturing technology, the air gap length becomes long, and since it is made of metal, it causes a significantly large eddy current loss at high speeds, which reduces efficiency and causes high temperatures, making it impossible to operate. There was also a drawback. It is also possible to make the coil conductor hollow and pass the liquid through it, but this would be expensive and unsuitable for small capacity machines. In addition, by applying a resin such as epoxy or polyimide to a cloth-like insulating member such as glass vapor or glass cloth or a thin cylindrical insulating member on the void surface of the core, heat curing it, and attaching it to the inner surface of the core, it is possible to create a fairly thin layer. It is also possible to form layers.

しかし乍ら、冷却液の温度および空隙面をへだてて回転
する回転子表面温度が高くなると、熱硬化した樹脂がと
げ、接着の一部が剥離し冷却液が洩れるという欠点があ
る。接着が剥離するのは接着剤が高温になるととげ出す
ためで、有機絶縁材料の温度限界になっている。このた
め無機絶縁材料例えばガラスを主成分とした材料で固定
子鉄○の空隙面を熱封着し、液密しやへし、層を形成す
る方法が考えられる。しかし乍ら固定子鉄心のスロット
関口部をガラス材料だけで閉塞しようとした場合には落
着加熱のさし、、ガラス材料がスロットから流れ出てし
まって閉塞し難いほか、一旦スロット閉口部に供給され
たガラス溶液が時間とともに固定子鉄心の積眉間隙に浸
透して行くので、スロット開口部においてガラスの欠乏
を生じ閉塞できないという欠点があった。However, when the temperature of the coolant and the surface temperature of the rotor rotating across the gap surface become high, the thermoset resin becomes splintered, part of the adhesive peels off, and the coolant leaks. The adhesive peels off because the adhesive splinters when it gets hot, which is the temperature limit for organic insulating materials. For this reason, a method can be considered in which the gap surface of the stator iron ○ is thermally sealed with an inorganic insulating material, such as a material whose main component is glass, to make it liquid-tight and form a layer. However, if you try to close the slot entrance part of the stator core with only glass material, the glass material will flow out from the slot due to settling heating, making it difficult to close it, and once it is supplied to the slot closing part. As the glass solution permeates into the gap between the stator cores over time, there is a problem that the slot opening becomes depleted of glass and cannot be closed.

またたとえスロット開口部をガラス材料でうまく閉塞す
ることができてもガラスだけではそれ自体の強度が低い
ので、振動や熱衝撃を加えられる回転電機にあっては、
閉塞部に亀裂を生じ実用性のあるものが得られなかった
。本発明は上記のような従来の欠点を除去するためにな
されたもので、固定子鉄心の積層面を気密に接合する低
融点ガラスの薄層と少なくとも固定子鉄Ｉ０のスロット
関口部を気密閉塞する骨材と低融点ガラスとの複合体と
を具備することを特徴とし、固定子鉄心のスロット開口
部の閉塞が確実容易でしかも振動や加熱に強く、．高温
に耐える液冷却固定子を備えた回転電機を提供するもの
である。Furthermore, even if the slot opening can be successfully closed with glass material, glass alone has low strength, so it is difficult to
Cracks occurred in the closed portion, making it impossible to obtain a practical product. The present invention has been made in order to eliminate the above-mentioned conventional drawbacks, and the present invention is made by airtightly closing at least the slot entrance portion of the stator iron I0 with a thin layer of low-melting glass that hermetically joins the laminated surfaces of the stator core. The feature is that the slot opening of the stator core can be reliably and easily blocked, and is resistant to vibration and heat. The present invention provides a rotating electric machine equipped with a liquid-cooled stator that can withstand high temperatures.

以下本発明の一実施例について図面を参照して説明する
。An embodiment of the present invention will be described below with reference to the drawings.

１は固定子鉄心で、薄鉄板２の積層面を気密接合するガ
ラス層２ａには例えば、厚さ数ムでＰｂ○−Ｂ２０３−
Ｚｎ０系の低融点ガラスを使用し、敏鋼板３とシールリ
ング４を溶接して成る端板組立５と共に加圧加熱溶着し
、スロット関口部６には１００〜２００メッシュのマグ
ネシァ粉末を骨村としＰｂｏ−Ｂ２０３一Ｚｎ○系の低
融点ガラスで結合したものを充填し加熱封着する。1 is a stator core, and the glass layer 2a that hermetically connects the laminated surfaces of the thin iron plates 2 is made of, for example, Pb○-B203- with a thickness of several mm.
Zn0 series low melting point glass is used, and the steel plate 3 and the seal ring 4 are welded together with the end plate assembly 5 under pressure and heat, and the slot entrance part 6 is filled with magnesia powder of 100 to 200 mesh as a frame. A combination of Pbo-B203 and Zn○-based low melting point glass is filled and sealed by heat.

スロット閉口部を閉塞するために上記のようにガラス複
合体を使用すると、加熱落着のさし、ガラス材料は骨村
粉末に含浸され保持されて、流れ出したり欠乏を生じる
ことがないので加工しやすい。When a glass composite is used as described above to close the slot closure, the glass material is impregnated and retained in the Otsumura powder during heating and is easy to process because it does not flow out or cause defects. .

低融点ガラスおよびその複合体によるこのような加工は
、約７７０ｏｏの鉄板の磁気変態点よりも低い温度でお
こなうことができる。Such processing with low melting point glasses and their composites can be performed at temperatures below the magnetic transformation point of iron plate, which is approximately 770 oo.

また、低融点ガラスおよびその複合体はガス透過性が低
く、長期劣化が少く、熱風諺張率が鉄に近い。In addition, low-melting glass and its composites have low gas permeability, little long-term deterioration, and a hot air elongation rate close to that of iron.

したがって、上記実施例のようにすると固定子鉄心の積
層面はガラスで接合されるので高温に耐え、リークや経
時劣化の心配がない。Therefore, in the above embodiment, since the laminated surfaces of the stator core are bonded with glass, they can withstand high temperatures and there is no fear of leakage or deterioration over time.

また固定子鉄心のスロット開□部６の閉塞にはマグネシ
ァ等を骨材としたガラス複合体を用いるので熱的や機械
的衝撃に強く、例えば、１００〜３００つ○のヒートサ
イクルや５ｋ９／塊の加圧テストに耐え実用性のあるも
のが得られる。固定子鉄心の積層面を気密接合するガラ
ス材料とスロット閉口部６のガラス複合体に使用される
ガラス材料は必ずしも同一のものでなくてもよい。In addition, since a glass composite with magnesia as an aggregate is used to close the slot openings 6 of the stator core, it is resistant to thermal and mechanical shocks. It is possible to obtain a product that can withstand the pressurization test and is of practical use. The glass material for airtightly joining the laminated surfaces of the stator core and the glass material used for the glass composite of the slot closing portion 6 do not necessarily have to be the same.

鉄心１の複数条のスロット７には弗素系樹脂（デュポン
社商品名テフロン）あるいは珪素系樹脂（シリコーン）
等によって絶縁された導線８またはサーモタイト線（昭
和電線電燈社商品名）等の絶縁塗膜を競付けた導線８を
巻き込み線輪９を形成する。The plurality of slots 7 of the iron core 1 are filled with fluorine-based resin (trade name: Teflon, manufactured by DuPont) or silicon-based resin (silicone).
A wire ring 9 is formed by winding a conductor wire 8 insulated with a wire such as a wire or a conductor wire 8 coated with an insulating coating such as a thermotite wire (trade name of Showa Dento Co., Ltd.).

そしてこの鉄心１を円筒状の固定子側板１０１こ鉄着支
承させ、これに環状の端環１１を端板紙立５部も同時に
つながるように“０”リング１２を介して取付ける。側
板１０と端環１１を絵合せたものを固定子枠１５と称し
、線論９の端部を包被する空室１６を形成する。１３は
側板１０に設けた冷却液体の出入口で線論端部の空室１
６に通じスロット７内には導線８相互間あるいは導線８
とスロット壁間に空間１４が出来で冷却液体の通路とな
る。This iron core 1 is iron-supported on a cylindrical stator side plate 101, and an annular end ring 11 is attached thereto via a "0" ring 12 so as to connect the end plate stand 5 at the same time. A combination of the side plate 10 and the end ring 11 is referred to as a stator frame 15, and forms a cavity 16 that covers the end of the wire rod 9. Reference numeral 13 denotes a cooling liquid inlet/outlet provided in the side plate 10, which is a vacant space 1 at the end of the line theory.
6 and inside the slot 7, the conductor wires 8 are connected to each other or the conductor wires 8
A space 14 is created between the slot wall and the slot wall to provide a passage for the cooling liquid.

尚１８は回転子である。以上述べた如く、本発明によれ
ば、固定子鉄心を形成する複数枚の薄鉄板のそれぞれの
表面に極薄の低融点ガラスをぬって積層し、加熱加圧に
よって溶着しているので、薄鉄板の層間から冷却液体が
リークすることがないし、又、スロット開□部を骨材と
低融点ガラスで結合したガラス複合体で封着したので、
ガラス材料でありながら、骨村に含浸保持されて、流れ
出したり、欠乏による穴を生ずることかない。Note that 18 is a rotor. As described above, according to the present invention, ultra-thin low-melting glass is applied and laminated on the surface of each of the plurality of thin iron plates forming the stator core, and is welded by heating and pressure. Cooling liquid does not leak between the layers of the steel plate, and the slot opening is sealed with a glass composite made of aggregate and low-melting glass.
Although it is a glass material, it is impregnated and retained in the bones, so it will not flow out or create holes due to deficiency.

しかも鉄心と同じ無機質の材料であるから、樹脂とは較
べものにならない高温に耐え、固定子鉄心のスロットに
冷却液体を通らせても液洩れせず、良く冷却でき、又落
着材料の厚さは数ム程度で極く薄いので、鉄心の占糠率
を悪化すること無く、特性のよい回転電機を提供するこ
とができる。Moreover, since it is made of the same inorganic material as the iron core, it can withstand high temperatures that are incomparable to resin, and even when cooling liquid is passed through the slots of the stator core, it does not leak and can be cooled well. Since it is extremely thin, on the order of several micrometers, it is possible to provide a rotating electric machine with good characteristics without deteriorating the bran content of the iron core.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の回転電機の−実施例の要部を示す縦断
面図、第２図はその０−ロ線に沿う断面の要部拡大図、
第３図は積層鉄心の要部拡大図である。 １・・・・・・固定子鉄心、２・・・・・・薄鉄板、２
ａ・・・・・・ガラス層、６……スロット開口部、７…
…スロット、９・・・・・・線輪、１３・・・・・・冷
却液体の出入口、１５・・・・・・固定子枠、１６・・
・・・・空室。 矛ノ図矛２図 矛ヲ図FIG. 1 is a longitudinal cross-sectional view showing the main parts of an embodiment of the rotating electric machine of the present invention, and FIG. 2 is an enlarged view of the main parts of the cross section along the 0-Ro line.
Figure 3 is an enlarged view of the main parts of the laminated core. 1...Stator core, 2...Thin iron plate, 2
a...Glass layer, 6...Slot opening, 7...
...slot, 9... wire ring, 13... cooling liquid inlet/outlet, 15... stator frame, 16...
····Vacancy. Illustration of spear 2 spear

Claims (1)

【特許請求の範囲】[Claims] １ 複数条のスロツトを有する複数枚の薄鉄板のそれぞ
れの表面に極薄の低融点ガラスをぬつて積層し、加圧加
熱によつて溶着し鉄心を形成し、その鉄心のスロツト開
口部は骨材と低融点ガラスを成分とするガラス複合体を
充填し加熱封着して固定子鉄心を形成し、この固定子鉄
心のスロツトに線輪を巻装し、この固定子鉄心と前記線
輪の外端部を包被する液密の固定子枠を設け、この固定
子枠の両線輪端部空室に、それぞれ冷却液体の出入口を
設けて固定子を液冷にしたことを特徴とする回転電機。1 Ultra-thin low-melting glass is laminated on the surface of each of a plurality of thin iron plates having multiple slots, and is welded under pressure and heat to form an iron core, and the slot openings of the iron core are A stator core is formed by filling and heat-sealing a glass composite consisting of low melting point glass and a low melting point glass.A wire ring is wound in the slot of this stator core, and the stator core and the wire ring are connected to each other. The stator is liquid-cooled by providing a liquid-tight stator frame that covers the outer end, and providing an inlet and an outlet for cooling liquid in the empty spaces at both ends of the stator frame. Rotating electric machine.