JPH0695814B2 - Rotating machine rotor - Google Patents
Rotating machine rotorInfo
- Publication number
- JPH0695814B2 JPH0695814B2 JP15438487A JP15438487A JPH0695814B2 JP H0695814 B2 JPH0695814 B2 JP H0695814B2 JP 15438487 A JP15438487 A JP 15438487A JP 15438487 A JP15438487 A JP 15438487A JP H0695814 B2 JPH0695814 B2 JP H0695814B2
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- slot
- conductor
- pole
- temperature rise
- 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.)
- Expired - Fee Related
Links
Landscapes
- Iron Core Of Rotating Electric Machines (AREA)
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関するものである。TECHNICAL FIELD The present invention relates to a rotor of a rotary electric machine.
従来の回転電機例えばタービン発電機の回転子は、導体
を埋込んだスロツト間の中央部に回転子の冷却用媒体を
通すベントスロツトを設け、このベントスロツトに冷却
用媒体を通してスロツトに埋込んだ導体を冷却する、所
謂間接冷却方式で冷却されていた。なおこれに関するも
のとして例えば米国特許第2661434号公報がある。A rotor of a conventional rotating electric machine, for example, a turbine generator, is provided with a vent slot through which a cooling medium for the rotor is passed at a central portion between slots in which a conductor is embedded. It was cooled by a so-called indirect cooling system. Note that, for example, US Pat. No. 2,661,434 is related to this.
上記従来技術で間接冷却方式を採用しているタービン発
電機で遅れ力率で負荷をとつて運転した場合の温度上昇
について配慮がされておらず、回転方向に対して遅れ側
のスロツト付近の温度が大きくなり、回転子の温度上昇
が不均一になつていた。There is no consideration given to the temperature rise when the turbine generator that employs the indirect cooling method in the above-mentioned conventional technology is operated with a load with a delayed power factor, and the temperature near the slot on the delay side with respect to the rotation direction is not considered. Was increased, and the temperature rise of the rotor was uneven.
本発明は以上の点に鑑みなされたものであり、温度上昇
を均一化することを可能とした回転電機の回転子を提供
することを目的とするものである。The present invention has been made in view of the above points, and an object of the present invention is to provide a rotor of a rotary electric machine that can equalize temperature rise.
上記目的は、ポールの中心から回転子の回転方向に対し
て遅れ側で、かつポール中心部側のスロツト内の導体に
通風孔を設け、この通風孔に冷却媒体を流通することに
より、達成される。The above object is achieved by providing a ventilation hole on the conductor in the slot on the side of the pole on the side lagging from the center of the pole with respect to the rotation direction of the rotor, and circulating the cooling medium in the ventilation hole. It
このようにポールの中心から回転子の回転方向に対して
遅れ側で、かつポール中心部側のスロツト内の導体に通
風孔を設け、この通風孔に冷却媒体を流通することによ
り、ポールの中心から回転子の回転方向の遅れ側で、か
つポール中心部側のスロツト付近の温度上昇が低減する
ようになつて、回転子の温度上昇を均一化することがで
きるようになるが、それを次に説明する。In this way, ventilation holes are provided in the conductor in the slot on the pole center side on the side lagging from the center of the pole in the direction of rotation of the rotor, and the cooling medium is circulated in the ventilation holes, so that the center of the pole is As a result, the temperature rise near the slot on the pole center side on the delay side of the rotor rotation direction can be reduced, and the temperature rise of the rotor can be made uniform. Explained.
従来の冷却の考え方は主な熱発生源が回転子の導体のみ
にあることを前提とし、冷却対象物は回転子の導体のみ
にある考え方であつた。従つて従来の冷却構造は導体の
いかなる位置に対しても均一な冷却容量であり、各スロ
ツトに対してすべて同一構造である。The conventional idea of cooling is based on the premise that the main heat source is only the conductor of the rotor, and the object to be cooled is only the conductor of the rotor. Therefore, the conventional cooling structure has a uniform cooling capacity at any position of the conductor, and is the same structure for each slot.
今回、上記導体からの熱発生以外に回転子表面からの熱
発生現象があることに注目し、この熱発生量を全周に対
して定量的に把握した結果、位置によつて熱発生量が異
なることが判明した。This time, paying attention to the fact that there is a heat generation phenomenon from the rotor surface in addition to the heat generation from the conductor, and as a result of quantitatively grasping this heat generation amount with respect to the entire circumference, the heat generation amount varies depending on the position. Turned out to be different.
この回転子表面からの熱発生原因の一つとして回転子の
テイース部を通過する交流磁束が考えられる。これは直
線状に展開した回転子，固定子断面の回転子の各位置で
の磁束密度が示されている第３図に示されているよう
に、回転子はサブスロツト（図示せず）を有するスロツ
ト1,ベントスロツト２があり、固定子にはスロツト３が
設けられている。回転子はこれらスロツト１およびベン
トスロツト２を備えた＃1,＃2,＃３…＃12スロツトがポ
ール４の中心から回転方向に対して遅れ側に順に＃1,＃
2,…＃12スロツトと配置されている。なお同図で５は回
転子のテイース部であり、６は固定子のテイース部であ
る。このように回転子はスロツト1,2,固定子スロツト３
があり、回転子が回転することにより回転子，固定子双
方のスロツトの相対的位置が変化し、それに伴い回転子
のテイース部５を通過する磁束が変化する、所謂交流磁
束が発生する。この交流磁束により回転子のテイース部
５にうず電流損が発生し、熱が発生することになる。One of the causes of heat generation from the rotor surface is the AC magnetic flux passing through the teeth portion of the rotor. The rotor has sub-slots (not shown), as shown in FIG. 3, which shows the magnetic flux density at each position of the rotor and the rotor of the stator cross section which are linearly expanded. The slot 1 and the vent slot 2 are provided, and the stator is provided with the slot 3. The rotor is provided with these slot 1 and vent slot # 1, # 2, # 3 ... # 12 The slots are arranged in order from the center of the pole 4 to the delay side with respect to the rotational direction.
2, ... # 12 Slotted. In the figure, 5 is a rotor teeth portion, and 6 is a stator teeth portion. In this way, the rotor is slot 1,2, stator slot 3
Therefore, the rotation of the rotor changes the relative positions of the slots of both the rotor and the stator, and the magnetic flux passing through the teeth portion 5 of the rotor changes accordingly, so-called AC magnetic flux is generated. This AC magnetic flux causes an eddy current loss in the tooth portion 5 of the rotor, and heat is generated.
従来の間接冷却方式を採用した回転電機が遅れ力率で運
転されている場合の交流磁束の状態を調べるために回転
子，固定子双方の形状データを考慮に入れ、有限要素法
（FEM）によつて解析した。第４図はある時点の磁束線
の様子を解析した回転電機断面図である。同図から明ら
かなように偏磁作用が現われているが、これは直流成分
であり熱発生の原因とは考えられない。そこで回転子と
固定子との相対的位置を徐々に変化させ、回転子表面の
磁束密度の最大値Bmaxと最小限Bminとを求め、その差Δ
Ｂ（第３図参照）を回転子表面のあらゆる点を算出し
た。第５図は横軸に回転子表面の位置をとり、縦軸にΔ
Ｂをとつて、上記算出値をプロツトした結果である。同
図から明らかなように遅れ力率発電機の場合、特に＃1,
＃２スロツト付近の回転子のテイース部のΔＢが大き
く、従つてこの付近での熱発生量が交流磁束による最大
値となる。Taking into consideration the shape data of both the rotor and the stator, the finite element method (FEM) is used in order to investigate the state of the AC magnetic flux when the rotating electrical machine that adopts the conventional indirect cooling method is operated at the delayed power factor. I analyzed it. FIG. 4 is a sectional view of a rotating electric machine in which the appearance of magnetic flux lines at a certain point of time is analyzed. As is clear from the figure, a magnetic biasing effect appears, but this is a direct current component and is not considered to be the cause of heat generation. Therefore, the relative positions of the rotor and the stator are gradually changed to obtain the maximum value B max and the minimum B min of the magnetic flux density on the rotor surface, and the difference Δ
B (see FIG. 3) was calculated for every point on the rotor surface. In Fig. 5, the horizontal axis represents the position of the rotor surface, and the vertical axis represents Δ.
B is the result of plotting the above calculated values. As is clear from the figure, in the case of a delayed power factor generator, especially # 1,
The ΔB of the tooth portion of the rotor near the # 2 slot is large, and therefore the amount of heat generated near this is the maximum value due to the AC magnetic flux.
ところで間接冷却構造では回転子のテイース部の発生熱
および回転子の導体を流れる電流による回転子の導体の
発生熱の双方を、回転子のテイース部表面およびベント
スロツトから冷却媒体に放熱するわけであるが、この状
態は回転子の導体の発生熱をHc、回転子のテイース部表
面での発生熱量をHtとすると、回転子のテイース部表面
およびベントスロツトから放熱すべき熱量Hoは、 Ho＝Hc＋Ht …（１） で表され、Hoが大きい場所程温度上昇も高くなると考え
られる。回転子の導体の発生熱量は、導体の断面積が一
定であれば回転子の導体のどの位置においてもHcは一定
であると考えてよい、従つてHoの値、すなわち回転子表
面の温度上昇はHtによつて決まる。上述のFEMの解析に
より＃1,＃２スロツト付近でHtが最大となつているが、
これは回転子の導体での発生熱量Hcの回転子のテイース
部およびベントスロツトからの放熱が他のスロツトより
も劣ることを意味する。従つて温度上昇も＃1,＃２スロ
ツト付近が最大になると考えられる。By the way, in the indirect cooling structure, both the heat generated in the rotor's teeth portion and the heat generated in the rotor's conductor due to the current flowing through the rotor's conductor are radiated from the rotor's teeth portion surface and the vent slot to the cooling medium. However, in this state, if the heat generated by the rotor conductor is H c and the heat generated on the rotor tooth surface is H t , the heat quantity H o to be radiated from the rotor tooth surface and vent slot is H It is expressed by o = H c + H t (1), and it is considered that the temperature rises higher in the place where H o is larger. Regarding the amount of heat generated by the rotor conductor, it can be considered that H c is constant at any position of the rotor conductor if the conductor cross-sectional area is constant, and therefore the value of H o , that is, the rotor surface The temperature rise is determined by H t . According to the above FEM analysis, H t is maximum near slots # 1 and # 2.
This means that the heat generated from the conductor of the rotor, H c , is radiated from the rotor's teeth portion and vent slot inferior to the other slots. Therefore, it is considered that the temperature rise is maximized near # 1 and # 2 slots.
以上から従来の冷却方式の考え方ではHcのみ考慮してい
たので、いかなる位置でも温度上昇は同じであり、一定
の冷却能力を持つた同一の冷却構造を各スロツトに設け
ればよいことになつていたが、このHcに位置によつて値
の異なるHtが加算されることにより、回転子表面全周で
温度上昇が不均一になつていることが判つた。実際に遅
れ力率発電機を長期間運転して、回転子表面の塗料等の
熱劣化の状況から温度上昇分布を推定すると、上述のFE
Mで解析した結果と同様、第６図にハツチングして示し
てあるように＃1,＃２スロツト付近の温度上昇が高いこ
とが立証された。そこで本発明ではポールの中心から回
転子の回転方向に対して遅れ側で、かつポール中心部側
のスロツト内の導体に通風孔を設け、この通風孔に冷却
媒体を流通するようにした。このようにすることにより
温度上昇を均一化することを可能とした回転電機の回転
子を得ることを可能としたものである。From the above, since only the H c is considered in the conventional cooling method, the temperature rise is the same at any position, and the same cooling structure with a constant cooling capacity should be provided for each slot. which was, but by different H t of by connexion value located in the H c is added, that the temperature rise in the entire circumference surface of the rotor is summer unevenly HanTsuta. If the delay power factor generator is actually operated for a long time and the temperature rise distribution is estimated from the state of thermal deterioration of paint on the rotor surface,
Similar to the result analyzed by M, it was proved that the temperature rise around # 1 and # 2 slots was high as shown by hatching in FIG. Therefore, in the present invention, a ventilation hole is provided in the conductor in the slot on the side of the center of the pole on the delay side from the center of the pole and in the rotation direction of the rotor, and the cooling medium is circulated in this ventilation hole. By doing so, it is possible to obtain the rotor of the rotary electric machine that can make the temperature rise uniform.
以下、図示した実施例に基づいて本発明を説明する。第
１図および第２図には本発明の一実施例が示されてい
る。なお従来と同じ部品には同じ符号を付したので説明
を省略する。同図に示されているようにサブスロツト1a
を有するスロツト１中にはターン絶縁７を介した回転子
の導体８が収納され、導体８とスロツト１との間はスロ
ツトアーマー９で絶縁されている。これらの導体８はク
リページブロツク10を介してウエツジ11で押えられてお
り、ベントスロツト２にはエアウエツジ12が設けられて
いる。このように構成された回転子で本実施例ではポー
ル４の中心から回転子の回転方向に対して遅れ側で、か
つポール中心部側のスロツト１内の導体８に通風孔13を
設け、この通風孔13に冷却媒体を流通するようにした。
このようにすることにより回転子の温度上昇が均一化す
るようになつて、温度上昇を均一化することを可能とし
た回転電機の回転子を得ることができる。Hereinafter, the present invention will be described based on the illustrated embodiments. An embodiment of the present invention is shown in FIGS. Since the same parts as those of the prior art are designated by the same reference numerals, the description thereof will be omitted. Sub-slot 1a as shown in the figure
A rotor conductor 8 via a turn insulator 7 is housed in the slot 1 having the above-mentioned structure, and the conductor 8 and the slot 1 are insulated by a slot armor 9. These conductors 8 are pressed by a wedge 11 via a clip page block 10, and the vent slot 2 is provided with an air wedge 12. In the rotor constructed in this manner, ventilation holes 13 are provided in the conductor 8 in the slot 1 on the side of the center of the pole 4 on the delay side from the center of the pole 4 with respect to the rotation direction of the rotor. The cooling medium was made to circulate through the ventilation holes 13.
By doing so, the temperature rise of the rotor is made uniform, and the rotor of the rotary electric machine capable of making the temperature rise uniform can be obtained.
すなわちサブスロツト1aを有するスロツト１およびベン
トスロツト２を備えた＃1,＃2,＃３…＃12スロツトがポ
ール４の中心から回転子の回転方向に対して遅れ側に＃
1,＃2,＃３…＃12スロツトと配置されているが、この＃
1,＃2,＃３…＃12スロツトのうちポール中心部側の＃1,
＃２スロツト内の導体８に通風孔13を設けた。そしてこ
の通風孔13に冷却媒体を流通するようにした。このよう
にすることにより磁束密度の変化量が最も大きく、温度
上昇の最も大きい回転方向に対して遅れ側の＃1,＃２ス
ロット付近がよく冷却されて温度上昇が低減するように
なり、回転子の温度上昇を均一にすることができ、信頼
性が向上する。That is, # 1, # 2, # 3 ... # 12 slots provided with the slot 1 having the sub-slot 1a and the vent slot 2 are on the delay side from the center of the pole 4 in the rotational direction of the rotor.
1, # 2, # 3 ... # 12 Slots are arranged, but this #
1, # 2, # 3 ... # 12 Of the slots, # 1, on the pole center side
A ventilation hole 13 was provided in the conductor 8 in the # 2 slot. Then, the cooling medium is made to circulate through the ventilation holes 13. By doing so, the amount of change in the magnetic flux density is the largest, and the # 1 and # 2 slots on the delay side with respect to the rotation direction in which the temperature rise is the greatest are well cooled, and the temperature rise is reduced. The temperature rise of the child can be made uniform, and the reliability is improved.
上述のように本発明は回転子の温度上昇が均一となつ
て、温度上昇を均一化することを可能とした回転電機の
回転子を得ることができる。As described above, according to the present invention, the temperature rise of the rotor is uniform, and the rotor of the rotating electric machine capable of equalizing the temperature rise can be obtained.
第１図は本発明の回転電機の回転子の一実施例の縦断側
面図、第２図は第１図の点線枠内の拡大縦断側面図、第
３図は直線状に展開した回転子、固定子断面のある時間
での回転子表面の磁束密度波形図、第４図はFEMのシミ
ユレーシヨンによる回転子を通過する磁束線を示す説明
図、第５図は回転子表面の位置と磁束密度変化量との関
係を示す特性図、第６図は回転子を平面化して温度上昇
の高い部分を示す説明図である。 １……スロツト、1a……サブスロツト、２……ベントス
ロツト、４……ポール、８……導体、13……通風孔。FIG. 1 is a vertical side view of an embodiment of a rotor of a rotating electric machine according to the present invention, FIG. 2 is an enlarged vertical side view within a dotted line frame of FIG. 1, and FIG. 3 is a linearly expanded rotor. Magnetic flux density waveform diagram of the rotor surface at a certain time of the stator cross section, Fig. 4 is an explanatory diagram showing magnetic flux lines passing through the rotor by FEM simulation, and Fig. 5 is the position of the rotor surface and magnetic flux density change FIG. 6 is a characteristic diagram showing the relationship with the amount, and FIG. 6 is an explanatory diagram showing a portion where the temperature is increased by flattening the rotor. 1 ... slot, 1a ... sub-slot, 2 ... vent slot, 4 ... pole, 8 ... conductor, 13 ... ventilation hole.
フロントページの続き (72)発明者 大井 柾雄 茨城県日立市幸町３丁目１番１号 株式会 社日立製作所日立工場内 (56)参考文献 特開 昭54−139004（ＪＰ，Ａ) 実開 昭61−192645（ＪＰ，Ｕ) 実開 昭59−149442（ＪＰ，Ｕ)Continuation of front page (72) Inventor Masao Oi 3-1-1 Sachimachi, Hitachi, Ibaraki Pref., Hitachi, Ltd. Hitachi factory (56) Reference JP 54-139004 (JP, A) Sho 61-192645 (JP, U) Actually opened Sho 59-149442 (JP, U)
Claims (1)
サブスロツトを有するスロツトとベントスロツトとが配
設され、前記スロツトには導体が埋込まれ、前記ベント
スロツトには冷却媒体が流通される回転電機の回転子に
おいて、前記ポールの中心から前記回転子の回転方向に
対して遅れ側で、かつポール中心部側のスロツト内の導
体に通風孔を設け、この通風孔に前記冷却媒体を流通す
るようにしたことを特徴とする回転電機の回転子。1. A rotation in which a slot having a sub-slot and a vent slot are disposed at predetermined intervals in the circumferential direction on both sides of the pole, a conductor is embedded in the slot, and a cooling medium is circulated in the vent slot. In a rotor of an electric machine, a ventilation hole is provided in a conductor in the slot on the pole center side on the delay side from the center of the pole and in the rotation direction of the rotor, and the cooling medium is circulated in the ventilation hole. A rotor of a rotating electric machine characterized by the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15438487A JPH0695814B2 (en) | 1987-06-23 | 1987-06-23 | Rotating machine rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15438487A JPH0695814B2 (en) | 1987-06-23 | 1987-06-23 | Rotating machine rotor |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JPH011437A JPH011437A (en) | 1989-01-05 |
| JPS641437A JPS641437A (en) | 1989-01-05 |
| JPH0695814B2 true JPH0695814B2 (en) | 1994-11-24 |
Family
ID=15582958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15438487A Expired - Fee Related JPH0695814B2 (en) | 1987-06-23 | 1987-06-23 | Rotating machine rotor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0695814B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5030871A (en) * | 1990-05-11 | 1991-07-09 | General Electric Company | Reducing harmonic losses in dynamoelectric machine rotors |
| US6833640B2 (en) * | 2000-12-07 | 2004-12-21 | Siemens Westinghouse Power Corporation | Method and apparatus to tune rotor's torsional natural frequency by geometry of rotor winding slot |
| JP4417970B2 (en) | 2007-03-29 | 2010-02-17 | 株式会社東芝 | Rotating electric machine and rotating electric machine rotor |
| JP2008295264A (en) * | 2007-05-28 | 2008-12-04 | Toshiba Corp | Rotor of dynamo-electric machine |
-
1987
- 1987-06-23 JP JP15438487A patent/JPH0695814B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS641437A (en) | 1989-01-05 |
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