JPH0255553A - Rotor of rotating electric machine - Google Patents
Rotor of rotating electric machineInfo
- Publication number
- JPH0255553A JPH0255553A JP20471788A JP20471788A JPH0255553A JP H0255553 A JPH0255553 A JP H0255553A JP 20471788 A JP20471788 A JP 20471788A JP 20471788 A JP20471788 A JP 20471788A JP H0255553 A JPH0255553 A JP H0255553A
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- bar
- rotor bar
- end ring
- beam welding
- 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
- 238000003466 welding Methods 0.000 claims abstract description 11
- 238000010894 electron beam technology Methods 0.000 claims description 9
- 230000006866 deterioration Effects 0.000 abstract 2
- 238000005219 brazing Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Landscapes
- Induction Machinery (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は回転電機の回転子に係り、特に、回転子バーに
エンドリンクを取付けるのに好適な構造に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rotor of a rotating electrical machine, and particularly to a structure suitable for attaching an end link to a rotor bar.
従来の回転子構造は、第４図、第５図に示すように、回
転子鉄心１の外周］−に多数のスロットに挿入された回
転子バー３の両端が回転子鉄心１より外部でエンドリン
グ４により短絡されている。In the conventional rotor structure, as shown in FIGS. 4 and 5, both ends of a rotor bar 3 inserted into a number of slots on the outer periphery of a rotor core 1 end outside the rotor core 1. It is short-circuited by ring 4.
ここで回転子バー３の端部はエンドリング４の溝に合致
させロウ付けしこよって接合している。ロウ付作業時、
回転子バー３は広範囲に加熱され、回転子バー３の強度
が低下する。特に、第４図のへ〜へ部はロウ付（ロウ付
部９）による熱影響が大きく、軟化も太きいため、運転
中のエンドリング４の繰返し振動等により応力が発生し
、回転子バ３はＡ−Ａ部より破断される懸念があった。Here, the ends of the rotor bar 3 are matched with the grooves of the end ring 4 and are joined by brazing. During brazing work,
The rotor bar 3 is heated extensively and the strength of the rotor bar 3 is reduced. Particularly, the heat effect from the brazing (brazing part 9) in Fig. 4 is large and the softening is large, so stress is generated due to repeated vibrations of the end ring 4 during operation, etc. 3, there was a concern that it would break from the A-A section.
また、最近の回転電機の大型化で回転子バー３の数が多
くロー付作業に多くの時間を費やすことも問題となって
いた。Further, with the recent increase in the size of rotating electric machines, the number of rotor bars 3 is large, and it has become a problem that a lot of time is spent on brazing work.
この種の装置として関連するものには、例えば、実開昭
５８−１１５８５５号公報が挙げられる。Related devices of this type include, for example, Japanese Utility Model Application Publication No. 58-115855.
上記従来技術は、回転子バーの両端部とエンドリングを
接合するためにエンドリングに溝を設けてバーと溝の隙
間をロウ付げによって接合していた。回転子バーはロウ
付は作業時、広範囲にわたって高温に加熱されるため、
母材が鈍ってバーの機械的強度が大幅に低下する。この
機械的強度の低下防止やロー付する位置等については考
慮されておらず、また、回転子バーは運転時の疲労によ
るロウ付は部のバー切れ、ロウ付は剥れ等の事故が発生
するなどの問題があった。In the above-mentioned prior art, grooves are provided in the end ring in order to connect both ends of the rotor bar and the end ring, and the gap between the bar and the groove is joined by brazing. Rotor bars are heated to high temperatures over a wide range during work, so
The base metal becomes dull and the mechanical strength of the bar is significantly reduced. There is no consideration given to preventing this reduction in mechanical strength or the location of brazing, and accidents such as brazing and peeling of rotor bars occur due to fatigue during operation. There were problems such as.
本発明の目的は回転子バーの軟化による機械的強度の低
下の防止、回転子バーとエンドリングの強度及び接合作
業性を向」ニさせることにある。The purpose of the present invention is to prevent a decrease in mechanical strength due to softening of the rotor bar, and to improve the strength and joining workability of the rotor bar and end ring.
上記目的は、エンドリングに突出部を設け、その突出部
と回転子バ一端部とを電子ビーム溶接で接合することに
より達成される。The above object is achieved by providing a protrusion on the end ring and joining the protrusion to one end of the rotor bar by electron beam welding.
回転電機の回転子バーとエンドリングとの接合部は、エ
ンドリングに突出部を設け、突出部と回転子バ一端部を
電子ビーム溶接することにより回転子バーは大幅に軟化
することがない。At the joint between the rotor bar and the end ring of a rotating electric machine, the end ring is provided with a protrusion, and the protrusion and one end of the rotor bar are electron beam welded, so that the rotor bar does not soften significantly.
また、回転子バーとエンドリングの接合部は第１図のＢ
−Ｂであるため、応力集中部Ａ−Ａより鉄心側にある、
応力集中部は接合部から適宜な距離があるため軟化が少
なく破断する恐れがない。Also, the joint between the rotor bar and the end ring is B in Figure 1.
-B, so it is closer to the core than the stress concentration part A-A.
Since the stress concentration part is located at an appropriate distance from the joint part, there is little softening and there is no risk of breakage.
以下、本発明の一実施例を第１図から第３図により説明
する。An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.
薄鉄板を積層した回転子鉄心１の外周上に複数個のスロ
ットを設け、そのスロツ１へに導体棒である回転子バー
３が挿入され、バーの両端は回転子鉄心より外部の位置
で短絡環であるエンドリング４に突出部５を設け、突出
部と電子ビーム溶接により接合される。通常、回転子バ
ーとエンドリングとの接続部には、運転時の遠心力、熱
伸び等による荷重が加わり、接続部のバー切れが起こり
やすい構造となっている。本発明は、このバー切れの起
こりやすい付根（Ｃ−Ｃ部）より、適宜、距離をとった
エンドリング突出部（１３〜Ｂ部）で回転子バ一端部を
電子ビーム溶接により接合しているので、バー切れの起
こる心配が少ない。A plurality of slots are provided on the outer periphery of a rotor core 1 made of laminated thin iron plates, and a rotor bar 3, which is a conductor rod, is inserted into the slot 1, and both ends of the bar are short-circuited at a position outside the rotor core. A protrusion 5 is provided on the end ring 4, which is a ring, and is joined to the protrusion by electron beam welding. Normally, the connection between the rotor bar and the end ring is subjected to loads due to centrifugal force, thermal expansion, etc. during operation, and the structure is such that the bar easily breaks at the connection. In the present invention, one end of the rotor bar is joined by electron beam welding at an end ring protrusion (section 13 to B) that is appropriately distanced from the base (section C-C) where bar breakage is likely to occur. Therefore, there is less worry about the bar running out.
本実施例によれば、エンドリングに突出部を設＝３
けたことにより、回転子バーの端部に発生する応力を緩
和させる効果がある。また、突出部と回転子バ一端部と
を電子ビーム溶接して接合することにより接合作業性の
向上・構造の簡素化、及び、回転子バーの軟化を低減す
る効果がある。According to this embodiment, the provision of the protrusion on the end ring has the effect of alleviating the stress generated at the end of the rotor bar. Further, by joining the protrusion and one end of the rotor bar by electron beam welding, there are effects of improving joining workability, simplifying the structure, and reducing softening of the rotor bar.
なお、従来のロウ付げによる接合は、加熱郡全体のバー
が軟化し、約４０％硬度が低下することが試験により明
確となっている。また、電子ビム溶接では、溶接部より
２０冊１離れた所では、はとんど軟化されず母材と同等
の硬度をもつことが試験により確認されている。In addition, tests have shown that when joining by conventional brazing, the bar of the entire heated group becomes soft and the hardness decreases by about 40%. Furthermore, in electron beam welding, tests have confirmed that at a distance of 20 cm from the welded part, the material hardly softens and has the same hardness as the base metal.
なお、図中６はシャフト、８は電子ビーム溶接部、９は
ロウ付は部。In the figure, 6 is the shaft, 8 is the electron beam welding part, and 9 is the brazing part.
本発明によれば、回転子バーの端部に発生する応力を緩
和し、接合作業性の向上、及び、回転子バーの軟化によ
る機械的強度の低下を防ぐことができる。According to the present invention, the stress generated at the end of the rotor bar can be alleviated, the joining workability can be improved, and the decrease in mechanical strength due to softening of the rotor bar can be prevented.
第１図は本発明の一実施例の回転電機の回転子の部分断
面図、第２図は第１図の■矢視図、第３図は本発明の他
の実施例の部分断面図、第４図は従来の回転子の部分断
面図、第５図は第４図の側面図である。
１・・・回転子鉄心、２・・・エンドダク１−５３・・
・回転子バー、４・・エンドリング、５・・突出部、６
・・・シャフト、７・・・エンドプレート、８・・・電
子ビーム溶接部、９・・・ロウ付部。1 is a partial sectional view of a rotor of a rotating electric machine according to an embodiment of the present invention, FIG. 2 is a view taken in the direction of the ■ arrow in FIG. 1, and FIG. 3 is a partial sectional view of another embodiment of the present invention FIG. 4 is a partial sectional view of a conventional rotor, and FIG. 5 is a side view of FIG. 4. 1... Rotor core, 2... End duct 1-53...
・Rotor bar, 4...end ring, 5...protrusion, 6
... Shaft, 7... End plate, 8... Electron beam welding part, 9... Brazing part.
Claims (1)
ロットに回転子バーを挿入し、前記回転子バーの両端を
短絡するエンドリングを設けた回転電機において、 前記回転子バーの端部と前記エンドリングを接合する際
、前記エンドリングの前記回転子バー側に突出部を設け
、前記突出部と前記回転子バーの端部とを電子ビーム溶
接により接合することを特徴とする回転電機の回転子。[Scope of Claims] 1. A rotating electric machine provided with a large number of slots on the outer periphery of a rotor core, a rotor bar inserted into the slot, and an end ring that short-circuits both ends of the rotor bar. When joining the end of the child bar and the end ring, a protrusion is provided on the rotor bar side of the end ring, and the protrusion and the end of the rotor bar are joined by electron beam welding. Characteristic rotor of rotating electric machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20471788A JPH0255553A (en) | 1988-08-19 | 1988-08-19 | Rotor of rotating electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20471788A JPH0255553A (en) | 1988-08-19 | 1988-08-19 | Rotor of rotating electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0255553A true JPH0255553A (en) | 1990-02-23 |
Family
ID=16495142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20471788A Pending JPH0255553A (en) | 1988-08-19 | 1988-08-19 | Rotor of rotating electric machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0255553A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105364247A (en) * | 2015-12-22 | 2016-03-02 | 南车株洲电机有限公司 | Anti-cracking welding method for end ring and conducting bar of motor rotor and anti-cracking soldered joint |
| JP2017099104A (en) * | 2015-11-20 | 2017-06-01 | 東芝三菱電機産業システム株式会社 | Squirrel-cage induction motor and end ring coupling method |
| CN109120126A (en) * | 2017-06-26 | 2019-01-01 | 东芝三菱电机产业***株式会社 | Cage modle incudes rotating electric machine and short-circuited conducting sleeve bearing method |
-
1988
- 1988-08-19 JP JP20471788A patent/JPH0255553A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017099104A (en) * | 2015-11-20 | 2017-06-01 | 東芝三菱電機産業システム株式会社 | Squirrel-cage induction motor and end ring coupling method |
| CN105364247A (en) * | 2015-12-22 | 2016-03-02 | 南车株洲电机有限公司 | Anti-cracking welding method for end ring and conducting bar of motor rotor and anti-cracking soldered joint |
| CN105364247B (en) * | 2015-12-22 | 2017-08-25 | 南车株洲电机有限公司 | The anticracking welding method and anticracking soldered fitting of motor rotor end ring and sliver |
| CN109120126A (en) * | 2017-06-26 | 2019-01-01 | 东芝三菱电机产业***株式会社 | Cage modle incudes rotating electric machine and short-circuited conducting sleeve bearing method |
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