JP2708546B2 - Ventilation device for vertical rotating electric machine - Google Patents
Ventilation device for vertical rotating electric machineInfo
- Publication number
- JP2708546B2 JP2708546B2 JP11375789A JP11375789A JP2708546B2 JP 2708546 B2 JP2708546 B2 JP 2708546B2 JP 11375789 A JP11375789 A JP 11375789A JP 11375789 A JP11375789 A JP 11375789A JP 2708546 B2 JP2708546 B2 JP 2708546B2
- Authority
- JP
- Japan
- Prior art keywords
- electric
- fans
- rotor
- electric fans
- divided
- 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
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- Motor Or Generator Cooling System (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は立軸回転電機の通風装置の改良に係り、特
に、高速大容量の水車発電機の通風装置の改良に関す
る。Description: BACKGROUND OF THE INVENTION The present invention relates to an improvement of a ventilation device of a vertical rotating electric machine, and more particularly to an improvement of a ventilation device of a high-speed and large-capacity water turbine generator.
一般に、高速大容量の水車発電機などでは、発電機の
損失が大きく、回転子に設けた機械式フアンでは充分な
冷却効果が得られないため、第２図に示すように、回転
子の上部及び下部に電動式のフアンを設置し、このフア
ンにより水車発電機を強制的に冷却する通風装置が多用
されている。Generally, in a high-speed, large-capacity turbine generator, etc., the loss of the generator is large, and the mechanical fan provided in the rotor cannot provide a sufficient cooling effect. Therefore, as shown in FIG. In addition, a motor-driven fan is installed at the lower part, and a ventilation device that forcibly cools the water turbine generator with the fan is often used.
また、上述の電動式フアンの総容量は、300MVA級水車
発電機で、1000kWにも達し、運転開始時の発電所所内電
源の電源変動率を小さくするためもあり、複数個の電動
式フアンをいくつかの群に分けて運転開始操作を行なつ
ている。すなわち、全台数を同時に運転開始せず、小容
量ずつに分けて時間差をおいて運転開始するものであ
る。In addition, the total capacity of the electric fan described above is a 300 MVA-class water turbine generator, which can reach 1000 kW, and in order to reduce the power fluctuation rate of the power supply in the power plant at the start of operation, multiple electric fans are used. Operation start operation is performed in several groups. In other words, the operation is not started for all the units at the same time, but is started for each small capacity with a time difference.
なお、この種の装置として関連するものには、例え
ば、特開昭60−210147号公報が挙げられる。A related device of this type is, for example, JP-A-60-210147.
上記従来技術は、複数個設置される電動式フアン電源
回路故障時、及び、通風回路の影響について考慮がされ
ておらず、下記の二つの問題があつた。The above prior art does not take into account the failure of the electric fan power supply circuit installed in a plurality of units and the influence of the ventilation circuit, and has the following two problems.
先ず、第一番目の問題として、例えば、電動式フアン
の組合せ（群）を平面配置上、上，下半々、あるいは、
左右半々で設置したものにおいて、ある特定の群に故障
が発生（例えば断線等）した場合、上側半分、あるい
は、左側半分の電動フアンが停止したことにより、冷却
が片寄り、機器の熱変形も一方向に過大に作用するた
め、重大事故に発展するものである。次に、第二番目の
問題として、電動式フアンの組合せ（群）毎に運転開始
することにより、各群間の運転開始に時間差が出るた
め、先行して運転を始めた電動式フアンの風圧の影響に
より、運転待機中の残りの電動式フアンが逆転し、この
逆転中の電動式フアンの運転開始時に過大な起動電流が
流れることである。First, as a first problem, for example, a combination (group) of electric fans is placed on a plane, upper, lower half, or
In the case where a certain group breaks down (for example, disconnection, etc.), the cooling fan is stopped due to the stop of the electric fan in the upper half or the left half. Since it acts excessively in one direction, it can lead to serious accidents. Next, as a second problem, since the operation is started for each combination (group) of electric fans, there is a time difference in the start of operation between the groups, so that the wind pressure of the electric fan that started operation earlier As a result, the remaining electric fan during the operation standby is reversed, and an excessive start-up current flows when the electric fan during the reverse rotation starts operation.
本発明の目的は、電動式フアンの組合せ（群）を均等
化し、電源回路故障時にも主機の冷却ケ所を等分化する
ことにより、安定した冷却効果を得ること、及び、電動
式フアン各群毎の運転開始時間差の影響による電動式フ
アンの逆転を防ぐ通風回路を提供することにある。SUMMARY OF THE INVENTION It is an object of the present invention to obtain a stable cooling effect by equalizing the combination (group) of electric fans and equally dividing a cooling location of a main engine even in the event of a power supply circuit failure. It is an object of the present invention to provide a ventilation circuit for preventing the electric fan from reversing due to the influence of the operation start time difference.
上記目的は、回転子の上部、及び、下部の各々に設け
られた複数個の電動式フアンを、平面配置上ほぼ均等と
なるように分散した群に分けることにより達成される。
即ち、回転子軸と直交する同一平面上に設けられた複数
個の電動式ファンを少なくとも２つの群に分けると共
に、回転子軸と直交する同一平面を回転子軸の廻りに群
の数と同数で、かつ、少なくとも２つの電動式ファンが
存在するように分割した場合、一つの分割平面内におけ
る電動式ファンの全数に対する一つの群に属する電動式
ファンの数の比率が67％以下になるよう複数個の電動式
ファンを配置することにより達成される。The above object is achieved by dividing a plurality of motorized fans provided on each of an upper portion and a lower portion of the rotor into groups that are dispersed so as to be substantially uniform in a planar arrangement.
That is, the plurality of electric fans provided on the same plane perpendicular to the rotor axis are divided into at least two groups, and the same plane perpendicular to the rotor axis is divided by the same number as the number of groups around the rotor axis. In the case where the electric fan is divided so that there are at least two electric fans, the ratio of the number of electric fans belonging to one group to the total number of electric fans in one division plane is 67% or less. This is achieved by arranging a plurality of electric fans.
また、電動式ファンの群の員数、及び、その配置を、
回転子の上部と下部とで同一にすることが好ましい。In addition, the number of members of the electric fan group and
It is preferable that the upper part and the lower part of the rotor be the same.
さらに、軸方向の略同一通風回路上に設けられた回転
子の上部と下部の電動式ファンを同一の群にすることが
好ましい。Further, it is preferable that the upper and lower electric fans of the rotor provided on the substantially same ventilation circuit in the axial direction be in the same group.
回転子の上部、及び、下部の各々に設けられた複数個
の電動式ファンを、平面配置上ほぼ均等となるような群
に分散配置している、即ち、回転子軸と直交する同一平
面上に設けられた複数個の電動式ファンを少なくとも２
つの群に分けると共に、回転子軸と直交する同一平面を
回転子軸の廻りに群の数と同数で、かつ、少なくとも２
つの電動式ファンが存在するように分割した場合、一つ
の分割平面内における電動式ファンの全数に対する一つ
の群に属する電動式ファンの数の比率が67％以下になる
よう複数個の電動式ファンを配置しているので、冷却通
風回路がほぼ均等に形成され、一部の群の電源回路が故
障したとしても、運転継続する残りの群の電動式ファン
の配置が平面配置上均等に分散されるため、電動式ファ
ン故障による過熱の影響が被冷却物に対し均等に作用
し、熱による異常変形に至らしめることがない。The upper part of the rotor, and a plurality of electric fans provided in each of the lower part are dispersedly arranged in a group that is substantially even on a planar arrangement, that is, on the same plane orthogonal to the rotor axis. At least two electric fans
And the same plane perpendicular to the rotor axis as the number of groups around the rotor axis, and at least 2
When divided so that there are two electric fans, a plurality of electric fans are arranged so that the ratio of the number of electric fans belonging to one group to the total number of electric fans in one division plane is 67% or less. Are arranged, the cooling ventilation circuit is formed almost evenly, and even if a part of the power supply circuit fails, the arrangement of the electric fans of the remaining group that continues to operate is evenly distributed on a plane. Therefore, the influence of overheating due to the failure of the electric fan acts uniformly on the object to be cooled, and does not lead to abnormal deformation due to heat.
また、電動式ファンの群の員数、及び、その配置を、
回転子の上部と下部とで同一にしているので、軸方向の
同一通風回路上にある回転子の上部電動式ファンと下部
電動式ファンの運転開始時間差を最小にし、遅れて運転
される電動式ファンの逆転を最小限に抑えることができ
る。In addition, the number of members of the electric fan group and
Since the upper part and the lower part of the rotor are the same, the operation start time difference between the upper electric fan and the lower electric fan of the rotor on the same ventilation circuit in the axial direction is minimized, and the electric Fan reversal can be minimized.
さらに、軸方向の略同一通風回路上に設けられた回転
子の上部と下部の電動式ファンを同一の群にしているの
で、軸方向の同一通風回路上にある回転子の上部電動式
ファンと下部電動式ファンの運転開始時間差がなくな
り、遅れて運転される電動式ファンの逆転を防止するこ
とができる。Furthermore, since the upper and lower electric fans of the rotor provided on the substantially same ventilation circuit in the axial direction are in the same group, the upper electric fan of the rotor on the same ventilation circuit in the axial direction The difference in the operation start time of the lower electric fan is eliminated, and the reverse rotation of the electric fan that is operated with a delay can be prevented.
以下、本発明の一実施例を第１図ないし第３図により
説明する。An embodiment of the present invention will be described below with reference to FIGS.
先ず、第２図において、１は回転子、２は上部電動式
フアン、３は下部電動式フアン、４は回転子コイル、５
は固定子コイル、６は空気冷却器であり、回転子コイル
４、及び、固定子コイル５で発生する熱量は、上部電動
式フアン２と下部電動式フアン３により強制的に循環さ
れた空気により持ち去られ、空気冷却器６により冷却さ
れる。又、a,b,c及びp,q,r,sは各々上部、及び、下部の
通風回路における風の流れを示したものである。First, in FIG. 2, 1 is a rotor, 2 is an upper electric fan, 3 is a lower electric fan, 4 is a rotor coil, 5
Is a stator coil, and 6 is an air cooler. The amount of heat generated in the rotor coil 4 and the stator coil 5 is determined by air forcedly circulated by the upper electric fan 2 and the lower electric fan 3. It is taken away and cooled by the air cooler 6. Also, a, b, c and p, q, r, s indicate the flow of wind in the upper and lower ventilation circuits, respectively.
ところで、上部電動式フアン２、及び、下部電動式フ
アン３は、その総容量が大きいことなどの理由から、各
々複数個で構成され、それらを数個ずつ組（群）分けし
て、各組（群）毎に電源回路を構成し、電動式フアンの
運転開始時間を各群毎に少しずつずらすことにより発電
所の電源変動を抑える方式が一般的に用いられている。By the way, the upper electric fan 2 and the lower electric fan 3 are each composed of a plurality of members because of a large total capacity and the like, and are divided into several groups (groups). A method is generally used in which a power supply circuit is configured for each (group), and a power supply fluctuation of the power plant is suppressed by slightly shifting the operation start time of the electric fan for each group.
ところが、定常運転中に何らかの原因で、一部の群の
電源回路に故障が発生し、一部の群の電動式フアンが途
中停止してしまうという不具合が発生した場合、例え
ば、上部電動式フアンの群分けを平面配置上，上下半々
あるいは左右半々で設置したものにおいて、冷却が一方
に片寄ることから機器の熱変形も一方向に過大な力とな
つて作用することとなる。別の問題点として、第３図に
示すように、仮に上部電動式フアン２を先に運転し、あ
る時間おいた後、下部電動式フアン３を運転する方式を
用いた場合、先行機である上部電動式フアン２の冷却風
の影響により、後行機の下部電動式フアン３が逆転し、
後行機運転開始時に過大起動電流が発生するものであ
る。However, if for some reason a failure occurs in the power supply circuits of some groups during steady-state operation and the electric fans of some groups stop halfway, for example, the upper electric fan In the case where the grouping is arranged in the upper and lower halves or the left and right halves on a planar arrangement, the cooling is biased to one side, so that the thermal deformation of the device also acts as an excessive force in one direction. As another problem, as shown in FIG. 3, if the system in which the upper electric fan 2 is operated first and then the lower electric fan 3 is operated after a certain period of time is used, it is a preceding machine. Under the influence of the cooling wind of the upper electric fan 2, the lower electric fan 3 of the following machine reverses,
An excessive starting current is generated at the start of the operation of the succeeding machine.
しかるに、本発明では、第１図に示すように、上・下
部電動式フアンの各々を回転軸７に対し対向するものを
一個の群とし、各群毎に開閉装置SW1〜４を経て主電源
８に接続したものである。In the present invention, however, as shown in FIG. 1, each of the upper and lower electric fans is opposed to the rotating shaft 7 as one group, and the main power supply is provided for each group via the opening / closing devices SW1 to SW4. 8.
本実施例によれば、上・下部電動式フアンのいずれか
一つの群の電源回路に故障が発生した場合でも、残りの
群で均等に回転子コイル、及び、固定子コイルを冷却可
能である。すなわち、本例では、上部電動式フアンを二
つの群に分けているので、上部電動式フアンの設置され
た平面を回転軸に対し任意に二分割すると、分割された
平面内にある合計二ケの電動式フアンは別々の群のフア
ンが各一ケであり、その比率は50％となり、本案の67％
以内にある。又、各群の運転開始順序として、開閉装置
の動作順序をSW1→SW4→SW2→SW3とすれば、軸方向の通
風回路上対になる上・下電動式フアンの運転開始時間差
が最小限となるので、逆転の影響を緩和出来る。仮に電
源の余裕があれば、SW1とSW4を同時に操作し、次にSW2
とSW3を同時に操作すれば時間差が全くなくなるし、図
示にはないが、軸方向に対向する電動式フアン、例えば
BU1とBL1を同一群にすれば同様の効果が得られることは
言うまでもない。According to the present embodiment, even if a failure occurs in any one of the power supply circuits of the upper and lower electric fans, the rotor coils and the stator coils can be cooled evenly in the remaining groups. . That is, in this example, since the upper electric fan is divided into two groups, if the plane on which the upper electric fan is installed is arbitrarily divided into two parts with respect to the rotation axis, a total of two parts in the divided plane are obtained. The electric fan of each group has a separate group of fans, each of which is 50%, which is 67% of the case
Within. Also, if the operation order of the switchgear is set as SW1 → SW4 → SW2 → SW3 as the operation start order of each group, the operation start time difference between the upper and lower electric fans that are paired in the axial ventilation circuit will be minimized. Therefore, the influence of the reversal can be reduced. If there is enough power, operate SW1 and SW4 simultaneously, then switch SW2
And SW3 are operated at the same time, there is no time difference at all, and although not shown, an electric fan facing in the axial direction, for example,
It goes without saying that the same effect can be obtained if BU1 and BL1 are in the same group.
尚、本実施例においては、回転子の上部、及び、下部
の各々に４つの電動式ファンを設けた場合について説明
したが、例えば、回転子の上部、及び、下部の各々に６
つの電動式ファンを設けた場合、或いは、それ以上の個
数を設けた場合でも前例と同様の効果を得ることができ
る。In the present embodiment, the case where four electric fans are provided in each of the upper and lower portions of the rotor has been described.
The same effect as in the previous example can be obtained even when two electric fans are provided, or when more fans are provided.
ここで、回転子の上部、及び、下部の各々に６つの電
動式ファンを設けた場合について説明する。Here, a case in which six electric fans are provided in each of the upper and lower portions of the rotor will be described.
回転子の上部、及び、下部の各々に６つの電動式ファ
ンを設けた場合、電動式ファンを２群乃至３群に分ける
ことができる。このうち、６つの電動式ファンを２群に
分けた場合は、回転子軸と直交する同一平面を回転子軸
の廻りに２つに分割すると、その分割平面内それぞれに
一つの群に属する電動機ファンが１つ、他の群に属する
電動機フアン２つが存在することになり、一つの分割平
面内における電動式ファンの全数に対する一つの群に属
する電動式ファンの数の比率は、電動式ファンが２つあ
る方で67％となる。When six electric fans are provided on each of the upper and lower parts of the rotor, the electric fans can be divided into two or three groups. When the six electric fans are divided into two groups, when the same plane orthogonal to the rotor axis is divided into two around the rotor axis, the motors belonging to one group in each of the divided planes. There will be one fan and two motor fans belonging to another group, and the ratio of the number of electric fans belonging to one group to the total number of electric fans in one division plane will be as follows. 67% if you have two.
一方、６つの電動式ファンを２群に分けた場合は、回
転子軸と直交する同一平面を回転子軸の廻りに３つに分
割すると、その分割平面内それぞれに群の異なる電動機
ファンが各々１つ存在することになり、一つの分割平面
内における電動式ファンの全数に対する一つの群に属す
る電動式ファンの数の比率は50％となる。On the other hand, when the six electric fans are divided into two groups, when the same plane orthogonal to the rotor axis is divided into three around the rotor axis, motor fans in different groups are respectively disposed in the divided plane. There is one, and the ratio of the number of electric fans belonging to one group to the total number of electric fans in one divided plane is 50%.
このように、回転子の上部、及び、下部の各々に６つ
の電動式ファンを設けた場合においても、一つの分割平
面内における電動式ファンの全数に対する一つの群に属
する電動式ファンの数の比率を67％以内にすることがで
き、前例と同様の効果を得ることができるものである。In this way, even when six electric fans are provided in each of the upper part and the lower part of the rotor, the number of electric fans belonging to one group with respect to the total number of electric fans in one divided plane is determined. The ratio can be within 67%, and the same effect as in the previous example can be obtained.
本発明によれば、電源回路の一部に故障が発生して
も、残りの電動式フアンにより被冷却体を均等に冷却可
能となるので、主機の回転子及び固定子の熱の影響によ
る異常変形が発生しない通風装置が得られる。又、先に
運転を開始した電動式フアンの通風の影響により遅れて
運転を始める電動式フアンの逆転の防止、あるいは、最
小限に抑えることが出来るので、遅れて運転を始める電
動式フアンに過大な起動電流が発生しなくなる。According to the present invention, even if a failure occurs in a part of the power supply circuit, the object to be cooled can be uniformly cooled by the remaining electric fan, so that an abnormality due to the influence of heat of the rotor and the stator of the main engine is achieved. A ventilation device without deformation is obtained. In addition, it is possible to prevent or minimize the reversal of the electric fan, which starts operation with a delay due to the ventilation of the electric fan that has started operation earlier, so that the electric fan that starts operation with a delay is excessive. No start-up current is generated.
第１図は、本発明による電動式フアンの群分けの一実施
例を示す系統図、第２図は、立軸回転電機の縦断面図、
第３図は、従来の冷却装置の不具合事例の説明図であ
る。 １…回転子、2,BU1〜４…上部電動式フアン、3,BL1〜４
…下部電動式フアン、７…回転軸。FIG. 1 is a system diagram showing one embodiment of the grouping of electric fans according to the present invention, FIG. 2 is a longitudinal sectional view of a vertical rotating electric machine,
FIG. 3 is an explanatory diagram of a failure example of the conventional cooling device. 1: Rotor, 2, BU1-4: Upper electric fan, 3, BL1-4
... lower electric fan, 7 ... rotating shaft.
フロントページの続き (72)発明者 菊池 誠 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 (72)発明者 石井 渡 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 (72)発明者 増子 光男 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60−28749（ＪＰ，Ａ) 特開 昭55−58750（ＪＰ，Ａ) 実開 昭51−143107（ＪＰ，Ｕ)Continued on the front page (72) Inventor Makoto Kikuchi 3-1-1, Sachimachi, Hitachi, Ibaraki Pref. Hitachi, Ltd. Hitachi Plant (72) Inventor Wataru Ishii 3-1-1, Sachimachi, Hitachi, Ibaraki Stock Hitachi, Ltd. Hitachi Factory (72) Inventor Mitsuo Masuko 3-1-1, Sachimachi, Hitachi City, Ibaraki Pref. Hitachi, Ltd. Hitachi Factory (56) References JP-A-60-28749 (JP, A) JP Showa 55-58750 (JP, A) Actually open Showa 51-143107 (JP, U)
Claims (3)
れた複数個の電動式ファンをいくつかの群に分け、その
分けた群毎に運転開始時間をずらして電動式ファンを運
転するようにした立軸回転電機の通風装置において、 回転子軸と直交する同一平面上に設けられた複数個の電
動式ファンを少なくとも２つの群に分けると共に、前記
平面を前記回転子軸の廻りに前記群の数で、かつ、少な
くとも２つの電動式ファンが存在するように分割した場
合、一つの分割平面内における電動式ファンの全数に対
する一つの群に属する電動式ファンの数の比率が67％以
下になるよう前記複数個の電動式ファンを配置すること
を特徴とする立軸回転電機の通風装置。A plurality of electric fans provided on each of an upper portion and a lower portion of a rotor are divided into several groups, and the electric fan is operated by shifting an operation start time for each of the divided groups. In the ventilation device for a vertical shaft rotating electric machine, the plurality of electric fans provided on the same plane orthogonal to the rotor shaft are divided into at least two groups, and the plane is arranged around the rotor shaft. In the case where the number of the electric fans belonging to one group is equal to 67% of the total number of the electric fans in one division plane when the number of the electric fans is divided so that at least two electric fans are present, the ratio is 67%. A ventilation device for a vertical rotating electric machine, wherein the plurality of electric fans are arranged as follows.
を、前記回転子の上部と下部とで同一にしたことを特徴
とする請求項１記載の立軸回転電機の通風装置。2. The ventilation device for a vertical rotating electric machine according to claim 1, wherein the number of electric fan groups and the arrangement thereof are the same between the upper part and the lower part of the rotor.
記回転子の上部と下部の電動式ファンを同一の群にした
ことを特徴とする請求項１記載の立軸回転電機の通風装
置。3. The ventilation device for a vertical rotating electric machine according to claim 1, wherein the upper and lower electric fans of the rotor provided on substantially the same ventilation circuit in the axial direction are in the same group. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11375789A JP2708546B2 (en) | 1989-05-08 | 1989-05-08 | Ventilation device for vertical rotating electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11375789A JP2708546B2 (en) | 1989-05-08 | 1989-05-08 | Ventilation device for vertical rotating electric machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02294246A JPH02294246A (en) | 1990-12-05 |
| JP2708546B2 true JP2708546B2 (en) | 1998-02-04 |
Family
ID=14620369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11375789A Expired - Fee Related JP2708546B2 (en) | 1989-05-08 | 1989-05-08 | Ventilation device for vertical rotating electric machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2708546B2 (en) |
-
1989
- 1989-05-08 JP JP11375789A patent/JP2708546B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02294246A (en) | 1990-12-05 |
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