JPH06197504A - Rotating electric machine - Google Patents
Rotating electric machineInfo
- Publication number
- JPH06197504A JPH06197504A JP34182792A JP34182792A JPH06197504A JP H06197504 A JPH06197504 A JP H06197504A JP 34182792 A JP34182792 A JP 34182792A JP 34182792 A JP34182792 A JP 34182792A JP H06197504 A JPH06197504 A JP H06197504A
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- short
- rotor bar
- circuit ring
- brazing
- 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
Landscapes
- Induction Machinery (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、主に車両用の回転電機
に係り、特に、かご回転子のローターバーと短絡環の接
続構造の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a rotary electric machine for a vehicle, and more particularly to improvement of a connecting structure between a rotor bar of a car rotor and a short-circuit ring.
【０００２】[0002]
【従来の技術】図10は、一般的な車両用回転電機の上半
部を示す縦断面図である。同図に示すように回転電機１
は、固定子２の両端部に軸受装置３，３が取付けられ、
この軸受装置３，３を介して、固定子２の内側中央部に
かご形回転子（以下、回転子という）４が回転自在に設
けられている。2. Description of the Related Art FIG. 10 is a vertical sectional view showing an upper half of a general vehicular rotating electric machine. As shown in FIG.
Has bearing devices 3 and 3 attached to both ends of the stator 2,
A cage rotor (hereinafter, referred to as a rotor) 4 is rotatably provided in the center of the inside of the stator 2 via the bearing devices 3 and 3.
【０００３】この回転子４は、薄鋼板を積層した鉄心５
を両側から鉄心押え６，６で挟み込み、シャフト４ａに
嵌合固着している。また、鉄心５の外周側には、多数の
スロット溝５ａが形成され、多数の導体から形成された
ローターバー７が挿入固定され、しかもそのローターバ
ー７の両端部には、リング状の短絡環８，８が全ロータ
ーバー７に接続固定され、ローターバー７の両端部がそ
れぞれ電気的に短絡されている。This rotor 4 has an iron core 5 formed by laminating thin steel plates.
Is clamped from both sides by iron core retainers 6 and 6, and is fixedly fitted to the shaft 4a. Further, a large number of slot grooves 5a are formed on the outer peripheral side of the iron core 5, and a rotor bar 7 formed of a large number of conductors is inserted and fixed, and both ends of the rotor bar 7 are ring-shaped short-circuit rings. 8 and 8 are connected and fixed to all the rotor bars 7, and both ends of the rotor bars 7 are electrically short-circuited.
【０００４】一方、固定子２には、薄鋼板を積層した鉄
心９が取付けられ、内周側にあるスロット溝９ａに多数
のコイル10が挿入固定され、外部からこれらのコイル10
に供給された電流によりコイル10に回転磁界が発生し、
同時に回転子４のローターバー７に誘導電流が流れ、誘
導磁界となって回転子４が回転する。On the other hand, an iron core 9 formed by laminating thin steel plates is attached to the stator 2, and a large number of coils 10 are inserted and fixed in the slot grooves 9a on the inner peripheral side.
A rotating magnetic field is generated in the coil 10 by the current supplied to
At the same time, an induced current flows in the rotor bar 7 of the rotor 4 to generate an induced magnetic field, which causes the rotor 4 to rotate.
【０００５】このとき、短絡環８は、発熱による熱膨脹
と、回転による遠心力で、回転子の半径方向に大きく膨
らみ、ローターバー７は、図11（ａ）に示す状態から、
同図（ｂ）または同図（ｃ）に示すように変形してい
く。At this time, the short-circuit ring 8 greatly expands in the radial direction of the rotor due to the thermal expansion due to the heat generation and the centrifugal force due to the rotation, and the rotor bar 7 is changed from the state shown in FIG.
It is deformed as shown in FIG.
【０００６】近年、回転電機の小形軽量化が進み、回転
子の回転数は従来に比べより速くなり、また、耐熱温度
に近い状態で用いられてきたため、短絡環８，８は益々
膨らみ、これに追従してローターバー７の変形も増大す
るので、ローターバー７に発生する曲げ応力は、一層増
大して過酷なものになっている。In recent years, the size and weight of rotating electric machines have been reduced, the number of rotations of the rotor has become faster than in the past, and since the rotor has been used at a temperature close to the heat resistant temperature, the short-circuit rings 8 and 8 swell more and more. Since the deformation of the rotor bar 7 also increases following the above, the bending stress generated in the rotor bar 7 further increases and becomes severe.
【０００７】そこで、この曲げ応力を緩和させるため
に、短絡環８，８の外周部の一部を機械加工し、この部
分に図12に示すように高張力鋼から形成したリング状の
保持環11，11（ただし、同図に一側のみを示す）を嵌め
込んで変形を抑制するようにした接続構造も採用されて
いる。Therefore, in order to relieve this bending stress, a part of the outer peripheral portion of the short-circuit rings 8 and 8 is machined, and a ring-shaped retaining ring formed of high-strength steel is formed in this portion as shown in FIG. A connection structure is also adopted in which 11 and 11 (however, only one side is shown in the figure) are fitted to suppress deformation.
【０００８】一方、ローターバー７と短絡環８の接続
は、図13または図14に示すように構成している。この接
続は、一般にろう付という溶接法で行われるが、以下、
各接続構造を順次説明する。On the other hand, the connection between the rotor bar 7 and the short circuit ring 8 is constructed as shown in FIG. 13 or 14. This connection is generally made by a welding method called brazing.
Each connection structure will be sequentially described.
【０００９】図13（ａ），（ｂ）は、ろう付による接続
構造を示す。リング状の短絡環８Ａには、ローターバー
７の端部が挿入される多数の半径方向に沿った溝８ａを
精度よく機械加工（▽▽で示す）してある。鉄心５のス
ロット溝５ａに挿入しているローターバー７に、この短
絡環８Ａを同図（ｂ）に矢印で示すように挿入し、溝８
ａに残る僅かな隙間をろう付溶接で埋め、ローターバー
７と短絡環８Ａを接続する。FIGS. 13A and 13B show a connection structure by brazing. In the ring-shaped short-circuit ring 8A, a large number of radial grooves 8a into which the ends of the rotor bars 7 are inserted are machined (indicated by ▽▽) with high precision. The short-circuit ring 8A is inserted into the rotor bar 7 inserted in the slot groove 5a of the iron core 5 as shown by an arrow in FIG.
The small gap remaining in a is filled with brazing and the rotor bar 7 and the short-circuit ring 8A are connected.
【００１０】しかしながら、この接続構造は、多数の溝
８ａ，……の機械加工が容易ではなく作業時間がかか
る。そこで、近年、図14（ａ），（ｂ）に示すように短
絡環８Ｂに溝を機械加工せず、直接付き合わせろう付す
る接続構成が考えられた。However, this connection structure is not easy to machine many grooves 8a, ... Therefore, in recent years, as shown in FIGS. 14 (a) and 14 (b), a connection structure in which a groove is not machined in the short-circuit ring 8B but a direct butt brazing is performed is considered.
【００１１】図15（ａ），（ｂ）は、この付き合わせろ
う付の接続構成の製造方法を示すもので、短絡環８Ｂに
リング状のプール溝８ｂを機械加工し、このプール溝８
ｂ内にローターバー７を付き合わせ、ローターバー７の
内径側の面の一部をこのプール溝８ｂに嵌合させ、取付
時の偏心を防止する。FIGS. 15 (a) and 15 (b) show a method of manufacturing the connection structure of the butt brazing, in which a ring-shaped pool groove 8b is machined in the short-circuit ring 8B, and the pool groove 8 is machined.
The rotor bar 7 is abutted in b, and a part of the inner diameter side surface of the rotor bar 7 is fitted into this pool groove 8b to prevent eccentricity at the time of mounting.
【００１２】このように準備された状態において、この
プール溝８ｂの残りの部分にろう材を予め置いておき、
誘導加熱装置等で一気に加熱し、ろう材を溶かしてろう
付（符号11で示す）するもので、上述した各溝８ａに挿
入しているローターバー７を１本ごとにろう棒を差しな
がらろう材を溶かしてろう付（このろう付は差しろう付
と呼称されている）する従来の構成に比べ、ろう付作業
性自体を改善することはできる。In the thus prepared state, a brazing material is previously placed on the remaining portion of the pool groove 8b,
It is heated all at once by an induction heating device or the like to melt and braze the brazing filler metal (indicated by reference numeral 11). The rotor bar 7 inserted into each groove 8a described above is inserted into the brazing rod for each one. The brazing workability itself can be improved as compared with the conventional configuration in which the material is melted and brazed (this brazing is referred to as the brazing).
【００１３】[0013]
【発明が解決しようとする課題】しかしながら、付き合
わせろう付の接続構成においてもやはり問題点があり、
実使用に当っては十分良い構成とはいえない。この問題
点とは、次のとおりである。すなわち、図13（ａ），
（ｂ）に示す従来構造の場合ろう付面積70は非常に広い
が、図14（ａ），（ｂ）に示す新しい付き合わせ構造の
ろう付面積71は図14（ａ），（ｂ）からも明らかなよう
に非常に狭いことである。However, there are still problems in the connection structure of butt brazing,
It is not a good configuration for actual use. This problem is as follows. That is, FIG. 13 (a),
In the case of the conventional structure shown in (b), the brazing area 70 is very large, but the brazing area 71 of the new mating structure shown in FIGS. 14 (a) and 14 (b) is shown in FIGS. 14 (a) and 14 (b). As is clear, it is very narrow.
【００１４】このように付き合わせろう付構造は、工作
作業性は良いものの狭いろう付面積のため、ろう付強度
を低下させるあらゆる要因を排除して従来構造に相当す
る強度維持が必要になっている。As described above, the butt brazing structure has a good workability but has a small brazing area. Therefore, it is necessary to eliminate all factors that lower the brazing strength and maintain the strength equivalent to that of the conventional structure. There is.
【００１５】そこで、本発明の目的は、回転子のロータ
ーバーと短絡環の付き合わせろう付構造を、作業性の低
下を招くことなく、ろう付強度を低下させるあらゆる要
因を排除し、または向上させる簡単で容易とした回転電
機を提供することにある。Therefore, an object of the present invention is to eliminate or improve all the factors that lower the brazing strength of the butt brazing structure of the rotor bar of the rotor and the short-circuit ring without lowering the workability. It is to provide a rotating electric machine that is simple and easy to operate.
【００１６】[0016]
【課題を解決するための手段】請求項１に記載の発明
は、鉄心外周部に複数のローターバーを等配して装着
し、このローターバーの両端部をそれぞれ環状の短絡環
で接続固定してかご形回転子を構成し、このかご形回転
子を固定子に回転自在に支持して成る回転電機におい
て、短絡環に、環状で位置決め部を有し、かつローター
バーの外径側，内径側のそれぞれの面と隙間を形成する
ようにした環状の溝を設け、この溝とローターバーの端
部を付き合わせろう付して接続固定したものである。According to a first aspect of the present invention, a plurality of rotor bars are equidistantly mounted on an outer peripheral portion of an iron core, and both ends of the rotor bar are connected and fixed by annular short-circuit rings. In a rotating electric machine that constitutes a squirrel-cage rotor and has a rotator supported by a stator rotatably, the short-circuit ring has an annular positioning portion, and the rotor bar has an outer diameter side and an inner diameter. An annular groove is provided so as to form a gap with each side surface, and the groove and the end portion of the rotor bar are brazed together and connected and fixed.
【００１７】また、請求項２に記載の発明は、鉄心外周
部に複数のローターバーを等配して装着し、このロータ
ーバーの両端部をそれぞれ環状の短絡環で接続固定して
かご形回転子を構成し、このかご形回転子を固定子に回
転支持して成る回転電機において、短絡環に、環状で位
置決め部を有し、かつローターバーの外径側，内径側の
それぞれの面と第１の隙間を形成すると共にローターバ
ーの端面との間にも第２の隙間を形成するようにした溝
を設け、この溝とローターバーの端部を付き合わせろう
付して接続固定したものである。According to a second aspect of the present invention, a plurality of rotor bars are equidistantly mounted on the outer peripheral portion of the iron core, and both ends of the rotor bar are connected and fixed by annular short-circuit rings, respectively. In a rotating electric machine that constitutes a child and has a squirrel cage rotor rotatably supported by a stator, a short-circuit ring has an annular positioning portion, and the rotor bar has an outer diameter side and an inner diameter side. A groove in which a first gap is formed and a second gap is also formed between the rotor bar and the end surface of the rotor bar, and the groove and the end of the rotor bar are brazed together and connected and fixed. Is.
【００１８】さらに、請求項３に記載の発明は、鉄心外
周部に複数のローターバーを等配して装着し、このロー
ターバーの両端部をそれぞれ環状の短絡環で接続固定す
ると共に短絡環の外周部に環状の保持環を固定してかご
形回転子を構成し、このかご形回転子を固定子に回転自
在に支持して成る回転電機において、短絡環に、環状で
位置決め部を有し、かつローターバーの内径側の面と第
１の隙間を形成すると共にローターバーの端面と第２の
隙間を形成するようにした溝を設け、この溝とローター
バーの端部を付き合わせろう付し、この付き合わせろう
付部を含む範囲の短絡環とローターバーの外周に切削部
を形成し、この切削部に保持環を固定したものである。Further, according to the third aspect of the present invention, a plurality of rotor bars are equidistantly mounted on the outer peripheral portion of the iron core, and both ends of the rotor bar are connected and fixed by annular short-circuit rings, and at the same time, In a rotary electric machine in which a ring-shaped holding ring is fixed to the outer periphery to form a squirrel-cage rotor, and the squirrel-cage rotor is rotatably supported by the stator, the short-circuit ring has an annular positioning portion. A groove is formed so as to form a first gap with the inner diameter side surface of the rotor bar and a second gap with the end surface of the rotor bar, and the groove and the end portion of the rotor bar are brazed together. Then, a cutting portion is formed on the outer periphery of the short-circuit ring and the rotor bar in the range including the butt brazing portion, and the retaining ring is fixed to the cutting portion.
【００１９】[0019]
【作用】請求項１に記載の発明によれば、回転電機の運
転時回転子の短絡環とローターバーは、上述した図11に
示すよう変形する。すなわち、回転し始めると短絡環の
昇温により熱膨脹と遠心力により、短絡環とローターバ
ーは図11（ｂ），（ｃ）に示すように複雑に変形してい
く。According to the invention described in claim 1, the short-circuit ring and the rotor bar of the rotor during operation of the rotating electric machine are deformed as shown in FIG. That is, when the rotation starts, the short circuit ring and the rotor bar are complicatedly deformed as shown in FIGS. 11 (b) and 11 (c) due to thermal expansion and centrifugal force due to the temperature rise of the short circuit ring.
【００２０】ここで、短絡環とローターバーが接合する
角部“Ａ”，“Ａ′”は、切り欠き状態となっているた
めに亀裂の起点となりやすく、ろう付接合部の強度を低
下させる要因になる。この強度の低下率は切り欠き係数
（１／Ｒ）で表わされ、角部の曲率半径Ｒが小さくなれ
ばなるほど大きくなるので、付き合わせろう付構造のよ
うにろう付面積が少ない場合は強度の低下を防止するた
め、このＲを大きくすることが必要にある。Here, since the corners "A" and "A '" where the short-circuit ring and the rotor bar are joined together are notched, they tend to become the starting points of cracks and reduce the strength of the brazed joint. Becomes a factor. This rate of decrease in strength is expressed by a notch coefficient (1 / R), and increases as the radius of curvature R of the corner decreases, so when the brazing area is small as in the butt brazing structure, the strength is reduced. In order to prevent the decrease of R, it is necessary to increase this R.
【００２１】図15に示された付き合わせろう付構造の場
合、“Ｂ”部は、短絡環の溝と同心度を出す位置決めを
兼ねた構成としているため、ほぼ直角でＲ＝Ｒ1 は小さ
く、切り欠き係数（１／Ｒ）は大きくなり不具合であ
る。このため、同図の“Ｃ”部のようにろう付時のろう
材による盛り上りで大きなＲ＝Ｒ2 を形成することの良
いことが分る。In the case of the butt brazing structure shown in FIG. 15, since the "B" portion has a structure which also serves as positioning for providing concentricity with the groove of the short-circuit ring, R = R 1 is small at almost right angles. The notch coefficient (1 / R) becomes large, which is a problem. Therefore, it can be seen that it is good to form a large R = R 2 due to the rise of the brazing filler metal at the time of brazing as in the “C” portion of the figure.
【００２２】本発明では、同心度を出すための位置決め
部を溝の中に形成しているので、ローターバーの全周に
ろう材により大きなＲ＝Ｒ2 の円弧面を有するろう付部
が形成され、付き合わせろう付構造のろう付強度を低下
させることがない。In the present invention, since the positioning portion for providing concentricity is formed in the groove, a brazing portion having a large arc surface of R = R 2 is formed by the brazing material on the entire circumference of the rotor bar. Therefore, the brazing strength of the butt brazing structure is not reduced.
【００２３】一方、ローターバーの全周をろう材で盛り
上げ大きなＲ＝Ｒ2 にする方法は他にもある。例えば図
15における溝８ｂの内周側“Ｂ”部を中心側に広げ、
“Ｃ”部と同様の構造にする方法である。しかしなが
ら、この方法によると、回転子と短絡環の同心度は、偏
心する可能性が高くなり、その分短絡環の内径を十分小
さくまたは外径を十分大きくしなければならないため、
短絡環を機械加工するための時間が増加し好ましくな
い。On the other hand, there is another method in which the entire circumference of the rotor bar is raised with a brazing material so that a large R = R 2 . For example
Widen the inner peripheral side "B" part of the groove 8b in 15 to the center side,
This is a method of making the structure similar to that of the “C” part. However, according to this method, the concentricity between the rotor and the short-circuit ring is likely to be eccentric, and the inner diameter of the short-circuit ring must be sufficiently small or the outer diameter must be sufficiently large accordingly.
The time for machining the short circuit ring increases, which is not preferable.
【００２４】また、上述した方法で、短絡環を特殊な治
工具を用い、回転子の同心度を合わせセッティングする
方法も考えられるが、ろう付時の熱酸化や溶けたろう材
の垂れ落ちにより、治工具は汚れ２回目以降用いること
ができなくなる可能性も大きい。In the above-mentioned method, a method of setting the concentricity of the rotor by using a special jig and tool for the short-circuit ring can be considered, but due to thermal oxidation during brazing or drooping of the melted brazing material, There is a high possibility that the jig cannot be used after the second stain.
【００２５】さらに、加熱・冷却時に短絡環と治工具の
温度差が発生するので、治工具の短絡環への取付け，取
外しは困難となり不具合であり、回転電機の機種が変る
（短絡環の寸法が異なる）たびに治工具を新製，変更し
なければならない等の不具合もある。Furthermore, since a temperature difference between the short-circuit ring and the jig occurs during heating / cooling, it is difficult to mount and remove the jig on the short-circuit ring, which is a problem. However, there is a problem that the jigs and tools must be newly made and changed each time.
【００２６】請求項２に記載の発明によれば、一般に付
き合わせろう付する場合の強度は、付き合わせ部の隙間
（Ｇ）に左右されるといわれている。最もろう付強度が
大きくなる理想的な付き合わせ部の隙間は、凡そＧ＝
0. １〜 0.2mmといわれている（これを理想隙間とい
う）。According to the second aspect of the invention, it is generally said that the strength of butt brazing depends on the gap (G) of the butt portion. The ideal butt joint gap that maximizes brazing strength is approximately G =
It is said to be 0.1 to 0.2 mm (this is called the ideal gap).
【００２７】図15の寸法で溶接する付き合わせろう付の
場合、ローターバーと短絡環は、ほぼ密着接合してお
り、隙間Ｇは無く、付き合わせろう付部の強度確保する
には不十分である。この隙間Ｇを理想隙間に保つため、
例えばローターバーと短絡環を予め何らかの方法で固定
子、位置決めする方法も考えられるが、ろう付溶接する
際の熱でローターバーと短絡環は急速に膨脹し、隙間Ｇ
を維持することは容易ではない。In the case of butt brazing for welding with the dimensions shown in FIG. 15, the rotor bar and the short-circuit ring are almost intimately joined, and there is no gap G, which is insufficient to secure the strength of the butt brazing portion. is there. In order to maintain this gap G as an ideal gap,
For example, a method of preliminarily fixing and positioning the rotor bar and the short-circuit ring by some method may be considered, but the rotor bar and the short-circuit ring rapidly expand due to the heat during brazing and the gap G
It's not easy to maintain.
【００２８】ところが、本発明では他の方法によっては
達成できない付き合わせ部の隙間の確保を、付き合わせ
部に形成した簡単な段差付き機械加工で容易に達成でき
るので、付き合わせろう付構造のろう付強度を低下させ
ることなく、むしろさらに向上させることができる。However, in the present invention, the securing of the gap of the butting portion, which cannot be achieved by other methods, can be easily achieved by the simple stepped machining formed on the butting portion. It is possible to further improve the bonding strength without lowering it.
【００２９】請求項３に記載の発明によれば、保持環を
必要とする回転子において、短絡環の取付け同心度を確
保するための嵌合または面取り状の嵌め合い構造を短絡
環の外周部に構成し、組立後に保持環を取付けるための
機械加工面をその嵌め合い構造よりも内径側に構成した
ので、短絡環とローターバーの嵌め合い部の角部の切り
欠きがなくなり、付き合わせろう付の強度上の低下がな
くなる。この場合、機械加工で余分に切削除去した部分
は、短絡環の円周方向断面積を保つため、他の部分で拡
大しなければならない。According to the third aspect of the present invention, in the rotor requiring the retaining ring, a fitting or chamfered fitting structure for securing the mounting concentricity of the shorting ring is provided on the outer peripheral portion of the shorting ring. Since the machined surface for attaching the retaining ring after assembly is configured on the inner diameter side of the fitting structure, there is no notch at the corner of the fitting part of the short-circuit ring and rotor bar There is no decrease in the strength of attachment. In this case, the portion that has been excessively cut and removed by machining must be enlarged in other portions in order to maintain the circumferential cross-sectional area of the short-circuit ring.
【００３０】[0030]
【実施例】以下、本発明の実施例を図面を参照して説明
する。図１は、本発明の一実施例の上半部を示す縦断面
図である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view showing the upper half of one embodiment of the present invention.
【００３１】同図において、20は回転電機を示し、この
回転電機20は、固定子２の両端部に取付けられた軸受装
置３，３を介してかご形回転子（以下、回転子という）
21Ａが、固定子２の内側中央部に回転自在に支持されて
いる。その他の構造は上述した従来の回転電機１と同様
の構造である。また、回転子21Ａは、短絡環22と、この
短絡環22とローターバー７の付き合わせろう付構造以外
は、上述した従来の回転子４と同様の構造である。In the figure, reference numeral 20 denotes a rotating electric machine, and the rotating electric machine 20 has a squirrel cage rotor (hereinafter referred to as a rotor) via bearing devices 3 mounted on both ends of the stator 2.
21A is rotatably supported on the inner center of the stator 2. The other structure is the same as that of the conventional rotary electric machine 1 described above. Further, the rotor 21A has the same structure as the conventional rotor 4 described above, except for the short-circuit ring 22 and the butt brazing structure of the short-circuit ring 22 and the rotor bar 7.
【００３２】まず、短絡環22は、一側の側面にループ状
のプール溝23を機械加工等で設けている、プール溝23
は、底面に連らなる外径側の側壁を直線状とし、底面に
連らなる内径側の側壁に段部23ａを形成し、段部23ａよ
り底面に近い側壁部分“Ｄ”部をローターバー７の内径
側の面が嵌め合わされて位置決めできるようにする。First, the short-circuit ring 22 has a pool groove 23 formed in a loop shape on one side surface by machining or the like.
Has a linear outer diameter side wall connected to the bottom surface and a step portion 23a formed on the inner diameter side wall connected to the bottom surface. The side wall "D" portion closer to the bottom surface than the step portion 23a has a rotor bar. The surface on the inner diameter side of 7 is fitted to enable positioning.
【００３３】また、以上のような短絡環22をローターバ
ー７の端部に挿入したとき、ローターバー７の外径側の
面とプール溝23の外径側の側壁との間には隙間が形成さ
れ、ローターバー７の内径側の面の端部はプール溝23の
内径側の側壁の底面に近い部分に嵌め合わされ、底面か
ら離れた部分とローターバー７の内径側の面との間には
隙間が形成されるようにする。When the short-circuit ring 22 as described above is inserted into the end portion of the rotor bar 7, a gap is formed between the outer diameter side surface of the rotor bar 7 and the outer diameter side wall of the pool groove 23. The end portion of the inner surface of the rotor bar 7 is fitted to a portion of the pool groove 23 close to the bottom surface of the inner wall of the pool groove 23, and is disposed between the portion away from the bottom surface and the inner surface of the rotor bar 7. Allows a gap to be formed.
【００３４】次に、短絡環22とローターバー７の端部と
の付き合わせろう付構造について説明する。短絡環22を
ローターバー７の端部に挿入してろう付するが、挿入す
ることによりローターバー７の内径側の面がプール溝23
の底面に近い側壁部分“Ｄ”部に嵌め合わされるので、
短絡環22と回転子21Ａの同心度が確保され、また、ろう
付することによりローターバー７の外径側の面と短絡環
22のプール溝23の側壁との間には隙間が形成されている
ので、ろう付部24ａに大きな曲率半径Ｒ2 の円弧面が形
成される。同様にローターバー７の内径側の面と短絡環
22のプール溝23の側壁との間にも隙間が形成されている
ので、ろう付部24ｂにも大きな曲率半径Ｒ2 の円弧面が
形成される。もちろん、ローターバー７の側面（外径側
の面および内径側の面と直交する面）と短絡環22のプー
ル溝23とのろう付部（図示しない）にも、大きな曲率半
径の円弧面が形成されることは説明するまでもない。つ
まり、ローターバー７の端部は、全周に大きな曲率半径
Ｒ2 の円弧面を形成したろう付部で短絡環22と接続され
る。なお、本発明は、以上の実施例（以下、第１実施例
という）に限定されるものでなく、種々変形実施でき
る。Next, the butt brazing structure of the short-circuit ring 22 and the end of the rotor bar 7 will be described. The short-circuit ring 22 is inserted into the end of the rotor bar 7 and brazed. By inserting the short-circuit ring 22, the surface on the inner diameter side of the rotor bar 7 is pool groove 23.
Since it is fitted to the side wall "D" near the bottom of the
The concentricity of the short-circuit ring 22 and the rotor 21A is secured, and by brazing, the surface on the outer diameter side of the rotor bar 7 and the short-circuit ring are
Since a gap is formed between the side wall of the pool groove 23 of 22 and the side wall of the pool groove 23, an arc surface having a large radius of curvature R 2 is formed in the brazing portion 24a. Similarly, the inner surface of the rotor bar 7 and the short-circuit ring
Since a gap is also formed between the side wall of the pool groove 23 of 22 and the brazed portion 24b, an arc surface having a large radius of curvature R 2 is also formed. Of course, an arc surface having a large radius of curvature is also formed on the brazing portion (not shown) between the side surface of the rotor bar 7 (the surface orthogonal to the surface on the outer diameter side and the surface on the inner diameter side) and the pool groove 23 of the short-circuit ring 22. Needless to say, it is formed. That is, the end portion of the rotor bar 7 is connected to the short-circuit ring 22 by a brazing portion that forms an arc surface having a large radius of curvature R 2 all around. The present invention is not limited to the above embodiment (hereinafter, referred to as the first embodiment) and can be variously modified and implemented.
【００３５】図３は、回転子21Ｂに用いる短絡環25を、
そのプール溝26が上述した第１実施例におけるプール溝
23と異なる形状にし、この短絡環25とローターバー７の
端部との接続構造も上述した第１実施例と異なるように
した実施例（以下、第２実施例という）を示す。すなわ
ち、この第２実施例におけるプール溝26は、底面に連ら
なる内径側の側壁の底面に近い側壁部“Ｅ”（深さｎで
示す）をローターバー７の内径側の面が嵌め合わされて
位置決めできるようにし、底面から遠い部分は面取り26
ａしてローターバー７の内径側の面との間に三角形状の
隙間が形成されるようにする。FIG. 3 shows a short-circuit ring 25 used for the rotor 21B,
The pool groove 26 is the pool groove in the first embodiment described above.
An embodiment (hereinafter referred to as a second embodiment) in which the shape of the short circuit ring 25 and the end portion of the rotor bar 7 is different from that of the first embodiment described above is shown. That is, in the pool groove 26 in the second embodiment, the side wall portion "E" (indicated by the depth n) close to the bottom surface of the inner diameter side wall continuous with the bottom surface is fitted to the inner diameter side surface of the rotor bar 7. And chamfer the part far from the bottom.
Then, a triangular gap is formed between the rotor bar 7 and the inner surface of the rotor bar 7.
【００３６】このような構造の短絡環25をローターバー
７に挿入してろう付すると、上述した第１実施例と同様
に短絡環25と回転子21Ｂの同心度が確保され、ローター
バー７の外径側の面とプール溝26の側壁との間のろう付
部27ａには大きな曲率半径Ｒ2 の円弧面が形成され、ロ
ーターバー７の内径側の面とプール溝26の側壁との間の
ろう付部27ｂにも大きな曲率半径Ｒ2 の円弧面が形成さ
れる。When the short-circuit ring 25 having such a structure is inserted into the rotor bar 7 and brazed, the concentricity between the short-circuit ring 25 and the rotor 21B is secured as in the first embodiment, and the rotor bar 7 An arcuate surface having a large radius of curvature R 2 is formed in the brazing portion 27a between the outer diameter side surface and the side wall of the pool groove 26, and between the inner diameter side surface of the rotor bar 7 and the side wall of the pool groove 26. An arcuate surface having a large radius of curvature R 2 is also formed on the brazing portion 27b.
【００３７】図４は、回転子21Ｃに用いる短絡環28を、
そのプール溝29が上述した第２実施例におけるプール溝
26と異なる形状にし、この短絡環28とローターバー７の
端部との接続構造も上述した第２実施例と異なるように
した実施例（以下、第３実施例という）を示す。すなわ
ち、この第３実施例におけるプール溝29は、底面に連ら
なる内径側の側壁を全長に亘り面取り29ａし、ローター
バー７の内径側の面との間に三角形状の隙間が形成され
るようにし、短絡環28と回転子21Ｃとの同心度位置決め
を面取り29ａの角部29ｂで行うようにする。FIG. 4 shows the short-circuit ring 28 used for the rotor 21C,
The pool groove 29 is the pool groove in the second embodiment described above.
An embodiment (hereinafter, referred to as a third embodiment) in which the short-circuit ring 28 and the end portion of the rotor bar 7 have a different shape from that of the second embodiment is also shown. That is, the pool groove 29 in the third embodiment is chamfered 29a over the entire length of the inner diameter side wall connected to the bottom surface, and a triangular gap is formed between the inner groove side surface of the rotor bar 7. In this way, concentricity positioning between the short-circuit ring 28 and the rotor 21C is performed at the corner portion 29b of the chamfer 29a.
【００３８】このような構造の短絡環28をローターバー
７の端部にに挿入してろう付すると、上述した第２実施
例と同様に短絡環28と回転子21Ｃの同心度が確保され、
ローターバー７の外径側の面とプール溝29の側壁との間
のろう付部30ａには大きな曲率半径Ｒ2 の円弧面が形成
され、ローターバー７の内径側の面とプール溝29の側壁
との間のろう付部30ｂにも大きな曲率半径Ｒ2 の円弧面
が形成される。もちろん、ローターバー７の側面とプー
ル溝29の間のろう付部（図示しない）にも大きな曲率半
径の円弧面が形成されることは説明するまでもない。When the short-circuit ring 28 having such a structure is inserted into the end portion of the rotor bar 7 and brazed, the concentricity between the short-circuit ring 28 and the rotor 21C is secured as in the second embodiment described above.
An arcuate surface having a large radius of curvature R 2 is formed on the brazing portion 30a between the outer diameter side surface of the rotor bar 7 and the side wall of the pool groove 29, and the inner diameter side surface of the rotor bar 7 and the pool groove 29 are formed. An arcuate surface having a large radius of curvature R 2 is also formed on the brazed portion 30b between the side wall and the side wall. Of course, it goes without saying that an arcuate surface having a large radius of curvature is also formed on the brazing portion (not shown) between the side surface of the rotor bar 7 and the pool groove 29.
【００３９】図５は、回転子21Ｄに用いる短絡環31を、
そのプール溝32が上述した第１実施例におけるプール溝
23に近似した形状にし、底面とローターバー７の端面と
の間に隙間Ｇが形成され、この短絡環31とローターバー
７の端部との接続構造も上述した各実施例と異なるよう
にした実施例（以下、第４実施例という）を示す。すな
わち、プール溝32は、底面に連らなる外径側の側壁を直
線状とし、底面に連らなる内径側の側壁に第１の段部32
ａおよび第２の段部32ｂを設け、第１の段部32ａにはロ
ーターバー７の端面が当接し、第１の段部32ａより底面
に近い側壁にローターバー７の内径側の面が嵌め合わさ
れるようにし、第２の段部32ｂより短絡環31の側面31ｂ
側に、ローターバー７の内径側の面と隙間を形成するよ
うにする。また、底面に連らなる外径側の側壁とロータ
ーバー７の外径側の面との間にも隙間が形成されるよう
にしている。FIG. 5 shows the short-circuit ring 31 used for the rotor 21D,
The pool groove 32 is the pool groove in the first embodiment described above.
The shape is similar to 23, and a gap G is formed between the bottom surface and the end surface of the rotor bar 7, and the connection structure between the short-circuit ring 31 and the end portion of the rotor bar 7 is also different from the above-described embodiments. An example (hereinafter referred to as a fourth example) will be described. That is, in the pool groove 32, the side wall on the outer diameter side that is continuous with the bottom surface is linear, and the first step portion 32 is on the side wall on the inner diameter side that is continuous with the bottom surface.
a and a second step portion 32b are provided, the end surface of the rotor bar 7 abuts on the first step portion 32a, and the inner diameter side surface of the rotor bar 7 is fitted to the side wall closer to the bottom surface than the first step portion 32a. The side surface 31b of the short-circuit ring 31 from the second step 32b
On the side, a gap is formed with the inner diameter side surface of the rotor bar 7. Further, a gap is formed between the outer diameter side wall connected to the bottom surface and the outer diameter side surface of the rotor bar 7.
【００４０】このような構造の短絡環31をローターバー
７に挿入してろう付すると、短絡環31と回転子21Ｄの同
心度は確保され、プール溝32の外径側の側壁とローター
バー７の外径側の面との間のろう付部33ａに大きな曲率
半径Ｒ2 の円弧面が形成され、プール溝32の第２の段部
32ｂの側面31ｂ側とローターバー７の内径側の面との間
のろう付部33ｂにも大きな曲率半径Ｒ2 の円弧面が形成
され、ローターバー７の端面とプール溝32の底面との間
にはろう付部33ｃが形成される。もちろん、ローターバ
ー７の側面とプール溝32とのろう付部（図示しない）に
も大きな曲率半径の円弧面が形成されることは説明する
までもない。When the short-circuit ring 31 having such a structure is inserted into the rotor bar 7 and brazed, concentricity between the short-circuit ring 31 and the rotor 21D is ensured, and the side wall of the pool groove 32 on the outer diameter side and the rotor bar 7 are secured. A circular arc surface having a large radius of curvature R 2 is formed in the brazed portion 33 a between the surface of the pool groove 32 and the outer surface of the pool groove 32.
An arcuate surface with a large radius of curvature R 2 is also formed in the brazing portion 33b between the side surface 31b of the side 32b and the surface on the inner diameter side of the rotor bar 7, and between the end surface of the rotor bar 7 and the bottom surface of the pool groove 32. A brazed portion 33c is formed on the. Of course, it goes without saying that an arcuate surface having a large radius of curvature is also formed on the brazing portion (not shown) between the side surface of the rotor bar 7 and the pool groove 32.
【００４１】図６は、回転子21Ｅに用いる短絡環34を、
そのプール溝35が上述した第４実施例におけるプール溝
32と異なる形状にし、この短絡環34とローターバー７の
端部との接続構造も上述した第４実施例と異なる実施例
（以下、第５実施例という）を示す。すなわち、この第
５実施例におけるプール溝35は、底面に連らなる内径側
の側壁を面取り35ａし、この面取り35ａに対応してロー
ターバー７の端部の角部にも面取り７ａし、両者を当接
させることによって短絡環34と回転子21Ｅの同心度位置
決めをするようにしている。FIG. 6 shows the short-circuit ring 34 used for the rotor 21E,
The pool groove 35 is the pool groove in the fourth embodiment described above.
An embodiment different from the above-described fourth embodiment (hereinafter referred to as the fifth embodiment) is also shown in which the short-circuit ring 34 and the end portion of the rotor bar 7 have a different shape from that of the third embodiment 32. That is, in the pool groove 35 in the fifth embodiment, the inner diameter side wall continuing to the bottom surface is chamfered 35a, and the corner portion of the end of the rotor bar 7 is chamfered 7a corresponding to this chamfer 35a. The short-circuit ring 34 and the rotor 21E are positioned concentrically by abutting against each other.
【００４２】このような構造の短絡環34をローターバー
７に挿入してろう付すると、短絡環34と回転子21Ｅの同
心度は確保され、プール溝35の外径側の側壁とローター
バー７の外径側の面との間のろう付部36ａに大きな曲率
半径Ｒ2 の円弧面が形成され、プール溝35の面取り35ａ
とローターバー７の内径側の面との間のろう付部36ｂに
も大きな曲率半径Ｒ2 の円弧面が形成され、ローターバ
ー７の端面とプール溝35の底面との間にはろう付部36ｃ
が形成される。もちろん、ローターバー７の側面とプー
ル溝35とのろう付部（図示しない）にも大きな曲率半径
の円弧面が形成されることは説明するまでもない。When the short-circuit ring 34 having such a structure is inserted into the rotor bar 7 and brazed, the concentricity between the short-circuit ring 34 and the rotor 21E is secured, and the outer diameter side wall of the pool groove 35 and the rotor bar 7 are secured. A circular arc surface having a large radius of curvature R 2 is formed in the brazed portion 36a between the surface of the pool groove 35 and the surface on the outer diameter side of the chamfer 35a of the pool groove 35a.
An arc surface having a large radius of curvature R 2 is also formed between the inner surface of the rotor bar 7 and the inner surface of the rotor bar 7, and a brazed portion is formed between the end surface of the rotor bar 7 and the bottom surface of the pool groove 35. 36c
Is formed. Of course, it goes without saying that an arc surface having a large radius of curvature is also formed on the brazed portion (not shown) between the side surface of the rotor bar 7 and the pool groove 35.
【００４３】図７は、回転子21Ｆに用いる短絡環37を、
そのプール溝38が上述した第５実施例におけるプール溝
35と異なる形状にし、この短絡環37とローターバー７の
端部との接続構造も異なる実施例（以下、第６実施例と
いう）を示す。すなわち、この第６実施例におけるプー
ル溝38は、底面に連らなる外径側の側壁と底面に連らな
る内径側の側壁を何れも直線状とし、かつ底面の中央部
に凸部38ａを設け、この凸部38ａに対応してローターバ
ー７の端面に凹部７ｂを設け、この凹部７ｂに凸部38ａ
を嵌め合わせることによって短絡環37と回転子21Ｆの同
心度位置決めをするようにしている。FIG. 7 shows the short-circuit ring 37 used for the rotor 21F,
The pool groove 38 is the pool groove in the fifth embodiment described above.
An embodiment (hereinafter referred to as a sixth embodiment) having a different shape from 35 and different in the connection structure between the short-circuit ring 37 and the end portion of the rotor bar 7 will be shown. That is, in the pool groove 38 according to the sixth embodiment, both the outer diameter side wall connected to the bottom surface and the inner diameter side wall connected to the bottom surface are linear, and the convex portion 38a is formed at the center of the bottom surface. The concave portion 7b is provided on the end surface of the rotor bar 7 corresponding to the convex portion 38a, and the convex portion 38a is formed in the concave portion 7b.
The short-circuit ring 37 and the rotor 21F are positioned concentrically by fitting with each other.
【００４４】このような構造の短絡環37をローターバー
７に挿入してろう付すると、短絡環37と回転子21Ｆの同
心度は確保され、プール溝38の外径側の側壁とローター
バー７の外径側の面との間のろう付部39ａに大きな曲率
半径Ｒ2 の円弧面が形成され、プール溝38の内径側の側
壁とローターバー７の内径側の面との間のろう付部39ｂ
にも大きな曲率半径Ｒ2 の円弧面が形成され、ローター
バー７の端面とプール溝38の底面との間にはろう付部39
ｃが形成される。もちろん、ローターバー７の側面とプ
ール溝38とのろう付部（図示しない）にも大きな曲率半
径の円弧面が形成されることは説明するまでもない。こ
の第６実施例は、上述した図11（ｂ），（ｃ）に示すよ
うに変形するローターバー７では、最も応力の小さい中
立点（中央部）に強度的には弱い嵌合部を構成している
ので、より強度の大きい付き合わせろう付が可能にな
る。When the short-circuit ring 37 having such a structure is inserted into the rotor bar 7 and brazed, concentricity between the short-circuit ring 37 and the rotor 21F is ensured, and the side wall of the pool groove 38 on the outer diameter side and the rotor bar 7 are secured. An arc surface having a large radius of curvature R 2 is formed in the brazing portion 39a between the inner surface of the pool groove 38 and the inner surface of the rotor bar 7. Part 39b
Also, a circular arc surface having a large radius of curvature R 2 is formed, and a brazing portion 39 is provided between the end surface of the rotor bar 7 and the bottom surface of the pool groove 38.
c is formed. Of course, it goes without saying that an arc surface having a large radius of curvature is also formed on the brazing portion (not shown) between the side surface of the rotor bar 7 and the pool groove 38. In the sixth embodiment, in the rotor bar 7 which is deformed as shown in FIGS. 11 (b) and 11 (c) described above, a weakly strong fitting portion is formed at the neutral point (central portion) with the smallest stress. As a result, butt brazing with greater strength is possible.
【００４５】図８は、短絡環とローターバー７の接続部
に保持環を設ける実施例（以下、第７実施例という）を
示し、上述した第４実施例に類似する構成を採用しなが
ら、かつ上述した図12に示す従来の保持環を用いる構造
を改良した実施例である。すなわち、この第７実施例に
おいて、回転子21Ｇに用いる短絡環40にはプール溝41を
設ける。このプール溝41は、底面に連らなる外径側の側
壁に段部41ａを設け、この段部41ａにローターバー７の
端面が当接し、段部41ａより側面40ａに近い側壁にロー
ターバー７の外径側の面が嵌め合わされて位置決めで
き、底面に連らなる内径側の側壁は直線状とし、この側
壁とローターバー７の内径側の面との間には隙間が形成
され、ローターバー７の端面と底面の間にも隙間Ｇが形
成されるようにする。FIG. 8 shows an embodiment (hereinafter referred to as a seventh embodiment) in which a retaining ring is provided at the connecting portion between the short-circuit ring and the rotor bar 7, and adopts a configuration similar to the above-mentioned fourth embodiment, Further, it is an embodiment in which the structure using the conventional retaining ring shown in FIG. 12 is improved. That is, in this seventh embodiment, the pool groove 41 is provided in the short circuit ring 40 used for the rotor 21G. The pool groove 41 is provided with a step portion 41a on the outer diameter side wall connected to the bottom surface, and the end surface of the rotor bar 7 abuts on the step portion 41a, and the rotor bar 7 is provided on the side wall closer to the side surface 40a than the step portion 41a. The outer diameter side surface of the rotor bar can be fitted and positioned, and the inner diameter side wall continuing to the bottom surface is linear, and a gap is formed between this side wall and the inner diameter side surface of the rotor bar 7. A gap G is also formed between the end surface and the bottom surface of 7.
【００４６】このような構造の短絡環40をローターバー
７の端部に挿入してろう付すると、短絡環40と回転子21
Ｇの同心度は確保され、ローターバー７の内径側の面と
プール溝41の内径側の側壁との間のろう付部42ａに大き
な曲率半径Ｒ2 の円弧面が形成され、ローターバー７の
端面とプール溝41の底面との間の隙間Ｇにもろう付部42
ｂが形成される。When the short-circuit ring 40 having such a structure is inserted into the end of the rotor bar 7 and brazed, the short-circuit ring 40 and the rotor 21 are
The concentricity of G is ensured, and an arcuate surface having a large radius of curvature R 2 is formed in the brazed portion 42a between the inner diameter side surface of the rotor bar 7 and the inner diameter side wall of the pool groove 41. The brazing part 42 is also provided in the gap G between the end surface and the bottom surface of the pool groove 41.
b is formed.
【００４７】以上のようにして短絡環40とローターバー
７の端部をろう付した後、短絡環40とローターバー７の
外径側の面の一部を機械加工（▽で示す）し、保持環43
の嵌め合い部“Ｆ”を形成する。この嵌め合い部“Ｆ”
に従来の保持環と同様に高張力鋼からリング状に形成し
た保持環43を挿入してろう付する。この接続構成によれ
ば、保持環43のある外径側のローターバー７と短絡環40
の切り欠きＲは、無限大となり全く問題ない状態になっ
ている。After brazing the ends of the short circuit ring 40 and the rotor bar 7 as described above, a part of the outer diameter side surface of the short circuit ring 40 and the rotor bar 7 is machined (indicated by ▽), Retaining ring 43
To form a fitting portion "F". This fitting part "F"
Similarly to the conventional retaining ring, a retaining ring 43 formed in a ring shape from high-strength steel is inserted and brazed. According to this connection configuration, the rotor bar 7 on the outer diameter side having the retaining ring 43 and the short-circuit ring 40 are connected.
The notch R is infinite and there is no problem.
【００４８】図９は、回転子21Ｈに用いる短絡環44に上
述した第６実施例におけるプール溝38に類似するプール
溝を設けながら、保持環43を取付けた実施例（以下、第
８実施例という）を示す。すなわち、この第８実施例に
おいて、短絡環44に設けるプール溝45は、底面に連らな
る外径側の側壁を直線状としローターバー７の外径側の
面が嵌め合わされて位置決めでき、底面に連らなる内径
側の側壁も直線状とし、ローターバー７の内径側の面と
の間には隙間が形成され、底面の中央部には凸部45ａを
設けてローターバー７の端面を当接させ、底面とロータ
ーバー７の端面との間にも隙間Ｇ，Ｇが形成されるよう
にする。FIG. 9 shows an embodiment in which the retaining ring 43 is attached to the short-circuit ring 44 used for the rotor 21H while the pool groove similar to the pool groove 38 in the sixth embodiment is provided (hereinafter, the eighth embodiment). That means). That is, in the eighth embodiment, the pool groove 45 provided in the short-circuit ring 44 has a side wall on the outer diameter side connected to the bottom surface which is straight, and the surface on the outer diameter side of the rotor bar 7 can be fitted and positioned. The side wall on the inner diameter side connected to the rotor bar is also linear, and a gap is formed between the inner side surface of the rotor bar 7 and a convex portion 45a is provided at the center of the bottom surface to contact the end surface of the rotor bar 7. The gaps G and G are also formed between the bottom surface and the end surface of the rotor bar 7 by contacting each other.
【００４９】このような構造の短絡環44をローターバー
７の端部に挿入してろう付すると、短絡環44と回転子21
Ｈの同心度は確保され、ローターバー７の内径側の面と
プール溝45の内径側の側壁との間のろう付部46ａに大き
な曲率半径Ｒ2 の円弧面が形成され、ローターバー７の
端面とプール溝45の底面との間の隙間Ｇ，Ｇにもろう付
部46ｂ，46ｂが形成される。When the short-circuit ring 44 having such a structure is inserted into the end of the rotor bar 7 and brazed, the short-circuit ring 44 and the rotor 21 are inserted.
The concentricity of H is ensured, and an arcuate surface having a large radius of curvature R 2 is formed in the brazing portion 46a between the inner diameter side surface of the rotor bar 7 and the inner diameter side wall of the pool groove 45. Brazing portions 46b and 46b are also formed in the gaps G and G between the end surface and the bottom surface of the pool groove 45.
【００５０】以上のようにして短絡環44とローターバー
７の端部をろう付した後、短絡環44とローターバー７の
外径側の面の一部を機械加工（▽で示す）し、保持環43
の嵌め合い部“Ｆ”を形成する。この嵌め合い部“Ｆ”
に保持環43を挿入してろう付する。この接続構成も、上
述した第７実施例と同様に保持環43のある外径側のロー
ターバー７と短絡環44の切り欠きＲは、無限大となり全
く問題ない状態になっている。After brazing the ends of the short-circuit ring 44 and the rotor bar 7 as described above, a part of the outer diameter side surface of the short-circuit ring 44 and the rotor bar 7 is machined (indicated by ▽), Retaining ring 43
To form a fitting portion "F". This fitting part "F"
The retaining ring 43 is inserted into and brazed. Also in this connection configuration, as in the case of the seventh embodiment described above, the notch R of the rotor bar 7 on the outer diameter side having the retaining ring 43 and the short-circuit ring 44 becomes infinite and there is no problem at all.
【００５１】なお、上述した第１乃至第４実施例は、主
として短絡環側を加工してローターバーの付き合わせろ
う付したが、ローターバー側を加工して短絡環と付き合
わせろう付するようにしてもよい。また、第１乃至第５
実施例は、短絡環の位置合わせ部をプール溝の内径側に
形成したが、プール溝内であれば外径側に形成してもよ
く、両方に形成してもよい。In the above-described first to fourth embodiments, the short-circuit ring side is mainly processed to braze the rotor bar, but the rotor bar side is processed to braze the short-circuit ring. You may Also, the first to the fifth
In the embodiment, the alignment portion of the short-circuit ring is formed on the inner diameter side of the pool groove, but it may be formed on the outer diameter side of the pool groove, or on both sides.
【００５２】[0052]
【発明の効果】以上説明したように本発明によれば、鉄
心外周部に複数のローターバーを等配して装着し、この
ローターバーの両端部をそれぞれ環状の短絡環で接続固
定してかご形回転子を構成し、このかご形回転子を固定
子に回転自在に支持して成る回転電機において、短絡環
に、環状で位置決め部を有し、かつローターバーの外径
側，内径側のそれぞれの面と隙間を形成するようにした
環状の溝を設け、この溝とローターバーの端部を付き合
わせろう付して接続固定するようにしているので、付き
合わせろう付構成の作業性を低下させることなく、ろう
付面積を増大してろう付強度を増大し、しかも構造も簡
易化した回転電機を提供できる。As described above, according to the present invention, a plurality of rotor bars are equidistantly mounted on the outer peripheral portion of the iron core, and both ends of the rotor bars are connected and fixed by annular short-circuit rings. In a rotary electric machine that constitutes a shaped rotor and has a rotator supported by a stator rotatably, the short-circuit ring has an annular positioning portion, and the rotor bar has an outer diameter side and an inner diameter side. An annular groove is formed so as to form a gap with each surface, and this groove and the end of the rotor bar are brazed together to connect and fix them. It is possible to provide a rotating electric machine having an increased brazing area and an increased brazing strength without lowering the simplification of the structure.
【図１】本発明の一実施例の上半部を切断して示す縦断
面図。FIG. 1 is a vertical cross-sectional view showing an upper half portion of one embodiment of the present invention by cutting.
【図２】本発明の一実施例の要部を示す断面図。FIG. 2 is a sectional view showing a main part of an embodiment of the present invention.
【図３】本発明の他の実施例（第２実施例）の要部を示
す断面図。FIG. 3 is a sectional view showing a main part of another embodiment (second embodiment) of the present invention.
【図４】本発明のさらに異なる他の実施例（第３実施
例）の要部を示す断面図。FIG. 4 is a cross-sectional view showing the main parts of still another embodiment (third embodiment) of the present invention.
【図５】本発明のさらに異なる他の実施例（第４実施
例）の要部を示す断面図。FIG. 5 is a cross-sectional view showing the main parts of still another embodiment (fourth embodiment) of the present invention.
【図６】本発明のさらに異なる他の実施例（第５実施
例）の要部を示す断面図。FIG. 6 is a sectional view showing a main part of still another embodiment (fifth embodiment) of the invention.
【図７】本発明のさらに異なる他の実施例（第６実施
例）の要部を示す断面図。FIG. 7 is a cross-sectional view showing the main parts of still another embodiment (sixth embodiment) of the present invention.
【図８】本発明のさらに異なる他の実施例（第７実施
例）の要部を示す断面図。FIG. 8 is a cross-sectional view showing the main parts of still another embodiment (seventh embodiment) of the present invention.
【図９】本発明のさらに異なる他の実施例（第８実施
例）の要部を示す断面図。FIG. 9 is a sectional view showing a main part of still another embodiment (eighth embodiment) of the invention.
【図１０】従来の車両用回転電機の上半部を示す縦断面
図。FIG. 10 is a vertical cross-sectional view showing an upper half of a conventional vehicle rotary electric machine.
【図１１】従来の短絡環とローターバーの相対変化の説
明図で、（ａ）は停止状態、（ｂ），（ｃ）は通電して
回転したとき熱膨脹と遠心力で短絡環が膨れ、ローター
バーが種々変化した状態を示す。FIG. 11 is an explanatory view of a relative change between a conventional short-circuit ring and a rotor bar, (a) is in a stopped state, (b) and (c) are swelling due to thermal expansion and centrifugal force when rotated by energizing, The state where the rotor bar is variously changed is shown.
【図１２】従来の短絡環に保持環を固定した構成を示す
断面図。FIG. 12 is a cross-sectional view showing a configuration in which a retaining ring is fixed to a conventional short-circuit ring.
【図１３】従来の短絡環とローターバーの接続構成で、
（ａ）は接続した状態、（ｂ）は接続前の状態を示す。FIG. 13 shows a conventional connecting structure of a short circuit ring and a rotor bar,
(A) shows a connected state, and (b) shows a state before connection.
【図１４】図13と異なる従来の短絡環とローターバーの
接続構成で、（ａ）は接続した状態、（ｂ）は接続前の
状態を示す。FIG. 14 is a connection configuration of a conventional short-circuit ring and a rotor bar different from FIG. 13, (a) shows a connected state, and (b) shows a state before connection.
【図１５】図14に示す従来の短絡環とローターバーの接
続構成の製造方法で、（ａ）は接続部全体を示し、
（ｂ）は接続部の一部を拡大して示す。FIG. 15 is a manufacturing method of the conventional connecting structure of the short circuit ring and the rotor bar shown in FIG. 14, (a) shows the entire connecting portion,
(B) shows an enlarged part of the connection part.
２…固定子、３…軸受装置、４，21Ａ〜21Ｈ…回転子、
５…鉄心、７…ローターバー、８，22，25，28，31，3
4，37，40，44…短絡環、23，26，29，32，35，38，4
1，45…プール溝、24ａ，24ｂ，27ａ，27ｂ，30ａ，30
ｂ，33ａ，33ｂ，33ｃ，36ａ，36ｂ，36ｃ，39ａ，39
ｂ，39ｃ，42ａ，42ｂ，46ａ，46ｂ…ろう付部、43…保
持環。2 ... Stator, 3 ... Bearing device, 4, 21A-21H ... Rotor,
5 ... Iron core, 7 ... Rotor bar, 8, 22, 25, 28, 31, 3
4, 37, 40, 44 ... Short-circuit ring, 23, 26, 29, 32, 35, 38, 4
1, 45 ... Pool groove, 24a, 24b, 27a, 27b, 30a, 30
b, 33a, 33b, 33c, 36a, 36b, 36c, 39a, 39
b, 39c, 42a, 42b, 46a, 46b ... Brazing part, 43 ... Retaining ring.
Claims (3)
して装着し、このローターバーの両端部をそれぞれ環状
の短絡環で接続固定してかご形回転子を構成し、このか
ご形回転子を固定子に回転自在に支持して成る回転電機
において、前記短絡環に、環状で位置決め部を有し、か
つ前記ローターバーの外径側，内径側のそれぞれの面と
隙間を形成するようにした環状の溝を設け、この溝と前
記ローターバーの端部を付き合わせろう付して接続固定
したことを特徴とする回転電機。1. A plurality of rotor bars are equidistantly mounted on the outer periphery of an iron core, and both ends of the rotor bar are connected and fixed by annular short-circuit rings to form a cage rotor. In a rotary electric machine in which a stator is rotatably supported by a stator, the short-circuit ring has an annular positioning portion, and a gap is formed between the outer surface and the inner surface of the rotor bar. The rotary electric machine is characterized in that an annular groove is provided, and the groove and the end portion of the rotor bar are connected and brazed together.
して装着し、このローターバーの両端部をそれぞれ環状
の短絡環で接続固定してかご形回転子を構成し、このか
ご形回転子を固定子に回転支持して成る回転電機におい
て、前記短絡環に、環状で位置決め部を有し、かつ前記
ローターバーの外径側，内径側のそれぞれの面と第１の
隙間を形成すると共に前記ローターバーの端面との間に
も第２の隙間を形成するようにした溝を設け、この溝と
前記ローターバーの端部を付き合わせろう付して接続固
定したことを特徴とする回転電機。2. A plurality of rotor bars are equidistantly mounted on the outer peripheral portion of the iron core, and both ends of the rotor bar are connected and fixed by annular short-circuit rings to form a cage rotor. In a rotary electric machine in which a child is rotatably supported by a stator, the short-circuit ring has an annular positioning portion, and forms a first gap with each of an outer diameter side and an inner diameter side of the rotor bar. At the same time, a groove is formed so as to form a second gap between the rotor bar and the end face of the rotor bar, and the groove and the end of the rotor bar are brazed together and fixedly connected. Electric machinery.
して装着し、このローターバーの両端部をそれぞれ環状
の短絡環で接続固定すると共に短絡環の外周部に環状の
保持環を固定してかご形回転子を構成し、このかご形回
転子を固定子に回転自在に支持して成る回転電機におい
て、前記短絡環に、環状で位置決め部を有し、かつ前記
ローターバーの内径側の面と第１の隙間を形成すると共
に前記ローターバーの端面と第２の隙間を形成するよう
にした溝を設け、この溝と前記ローターバーの端部を付
き合わせろう付し、この付き合わせろう付部を含む範囲
の前記短絡環と前記ローターバーの外周に切削部を形成
し、この切削部に前記保持環を固定したことを特徴とす
る回転電機。3. A plurality of rotor bars are equidistantly mounted on the outer peripheral portion of the iron core, and both ends of the rotor bar are connected and fixed by annular short-circuit rings, and an annular retaining ring is fixed to the outer peripheral portion of the short-circuit ring. In a rotating electric machine that constitutes a squirrel-cage rotor and rotatably supports the squirrel-cage rotor on a stator, the short-circuit ring has an annular positioning portion, and the rotor bar has an inner diameter side. Groove is formed so as to form a first gap with the face of the rotor bar and a second gap with the end face of the rotor bar, and the groove and the end part of the rotor bar are brazed together, and this jointing is performed. A rotary electric machine, wherein a cutting portion is formed on an outer periphery of the short-circuit ring and the rotor bar in a range including a brazing portion, and the holding ring is fixed to the cutting portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34182792A JPH06197504A (en) | 1992-12-22 | 1992-12-22 | Rotating electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34182792A JPH06197504A (en) | 1992-12-22 | 1992-12-22 | Rotating electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06197504A true JPH06197504A (en) | 1994-07-15 |
Family
ID=18349060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34182792A Pending JPH06197504A (en) | 1992-12-22 | 1992-12-22 | Rotating electric machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06197504A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1109396C (en) * | 1996-11-15 | 2003-05-21 | 三菱电机株式会社 | Rotor of squirrel-cage induction motor and making method |
| DE102012214068B4 (en) * | 2011-08-15 | 2016-06-09 | GM Global Technology Operations, LLC (n.d. Ges. d. Staates Delaware) | ROTOR FOR AN ELECTRIC MOTOR AND SOLDERING PROCESS |
-
1992
- 1992-12-22 JP JP34182792A patent/JPH06197504A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1109396C (en) * | 1996-11-15 | 2003-05-21 | 三菱电机株式会社 | Rotor of squirrel-cage induction motor and making method |
| DE102012214068B4 (en) * | 2011-08-15 | 2016-06-09 | GM Global Technology Operations, LLC (n.d. Ges. d. Staates Delaware) | ROTOR FOR AN ELECTRIC MOTOR AND SOLDERING PROCESS |
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