JPH07233775A - Lubricant cooling device for francis turbine - Google Patents
Lubricant cooling device for francis turbineInfo
- Publication number
- JPH07233775A JPH07233775A JP6022936A JP2293694A JPH07233775A JP H07233775 A JPH07233775 A JP H07233775A JP 6022936 A JP6022936 A JP 6022936A JP 2293694 A JP2293694 A JP 2293694A JP H07233775 A JPH07233775 A JP H07233775A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- oil tank
- lubricating oil
- side wall
- outer side
- 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.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Hydraulic Turbines (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、立軸の水車軸の主軸ス
カートと、これを支持する主軸受とが浸されて水車軸の
主軸受での回転部を潤滑する油槽内の潤滑油を冷却する
フランシス水車の潤滑油冷却装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention cools a lubricating oil in an oil tank for lubricating a rotating portion of a main bearing of a water turbine shaft by immersing a main shaft skirt of a vertical water wheel shaft and a main bearing supporting the main shaft skirt. It relates to a lubricating oil cooling device for a Francis turbine.
【０００２】[0002]
【従来の技術】立軸のフランシス水車において、水車軸
に設けられた主軸スカートと、これを支持する主軸受と
が環状の油槽に充填された潤滑油に浸され、水車軸の回
転時、主軸スカートの主軸受での回転部は前記油槽内の
潤滑油により潤滑される。この際、回転により昇温する
潤滑油を、水車軸に取付けられたランナとこのランナを
覆う上カバーとの間の背圧水により冷却するフランシス
水車として図７に示すものが知られている。2. Description of the Related Art In a vertical Francis turbine, a main shaft skirt provided on a water turbine shaft and a main bearing that supports the main shaft skirt are immersed in a lubricating oil filled in an annular oil tank, and the main shaft skirt is rotated when the water turbine shaft rotates. The rotating part of the main bearing is lubricated by the lubricating oil in the oil tank. At this time, a Francis turbine shown in FIG. 7 is known as a Francis turbine that cools the lubricating oil whose temperature rises by rotation with back pressure water between a runner attached to the turbine shaft and an upper cover covering the runner.
【０００３】図７において、立軸の水車軸１は上部に主
軸スカート２が設けられ、図示しない下端に部分的に図
示したランナ３が取付けられている。なお、主軸スカー
ト２の下部には潤滑油が通流する外側に上向く勾配を有
する油孔４が設けられている。主軸受５は、これに設け
られた環状の支持板６を介して軸受支え７の内壁から突
出する支持台８に固定されており、この主軸受５は油孔
４に連通する隙間を有して主軸スカート２により水車軸
１を支持している。なお、支持板６には潤滑油が流れる
複数箇の油孔９が設けられている。In FIG. 7, a vertical water wheel shaft 1 is provided with a main shaft skirt 2 on the upper portion thereof, and a partially illustrated runner 3 is attached to the lower end thereof which is not shown. An oil hole 4 is formed in the lower part of the main shaft skirt 2 and has an upward slope with which lubricating oil flows. The main bearing 5 is fixed to a support base 8 protruding from the inner wall of the bearing support 7 via an annular support plate 6 provided therein, and the main bearing 5 has a gap communicating with the oil hole 4. The main shaft skirt 2 supports the water turbine shaft 1. The support plate 6 is provided with a plurality of oil holes 9 through which lubricating oil flows.
【０００４】上カバー１１は水車軸１を囲んでランナ３
を覆って設けられ、この上カバー１１には軸受支え７が
取付けられている。そして上カバー１１には、ランナ３
の外縁部に臨む位置に上バー１１とランナ３との間の背
圧水が流れる流路孔１２が設けられ、この流路孔１２は
軸受支え７の外周に設けた水室１３に連通している。ま
た、軸受支え７の内部には、主軸スカート２の主軸受５
での回転部を潤滑する潤滑油が充填された環状の油槽１
５が設けられている。油槽１５は軸受支え７の一部を外
側側壁とし、この外側側壁とこの側壁から突出する環状
の底板１６とからなる外側油槽部１７と、環状の底板１
９を有する環状の内側油槽部１８とを底板１６と底板１
９とにわたして環状の連結板２０を取付けて形成されて
いる。そして、油槽１５の外側側壁となる軸受支え７の
内壁には、複数列の伝熱フィン２１が取付けられてい
る。なお、２２は主軸受５の外周に取付けられた環状の
整流板である。An upper cover 11 surrounds the water wheel axle 1 and a runner 3
The bearing support 7 is attached to the upper cover 11. And on the upper cover 11, the runner 3
A flow path hole 12 through which back pressure water flows between the upper bar 11 and the runner 3 is provided at a position facing the outer edge of the bearing. The flow path hole 12 communicates with a water chamber 13 provided on the outer periphery of the bearing support 7. ing. Further, inside the bearing support 7, the main bearing 5 of the main shaft skirt 2 is
Annular oil tank 1 filled with lubricating oil to lubricate rotating parts in
5 are provided. The oil tank 15 has a part of the bearing support 7 as an outer side wall, and an outer oil tank part 17 including the outer side wall and an annular bottom plate 16 protruding from the side wall, and the annular bottom plate 1.
An annular inner oil tank portion 18 having a bottom plate 16 and a bottom plate 1
It is formed by attaching an annular connecting plate 20 to 9 and. A plurality of rows of heat transfer fins 21 are attached to the inner wall of the bearing support 7 which is the outer side wall of the oil tank 15. Reference numeral 22 is an annular current plate attached to the outer periphery of the main bearing 5.
【０００５】油槽１５の外側側壁を形成する軸受支え７
の外側には、油槽１５の外周を囲む環状の冷却室２４が
設けられ、この軸受支え７の外壁には複数列の伝熱フィ
ン２５が設けられている。軸受支え７の上部と水車軸１
との間の開口は、マンホール板２６を備えたカバー２７
により水車軸１と隙間を有して閉鎖されている。A bearing support 7 forming the outer side wall of the oil tank 15.
An annular cooling chamber 24 that surrounds the outer periphery of the oil tank 15 is provided on the outer side of the, and a plurality of rows of heat transfer fins 25 are provided on the outer wall of the bearing support 7. Upper part of bearing support 7 and turbine shaft 1
The opening between and is a cover 27 equipped with a manhole plate 26.
Is closed with a gap from the water wheel shaft 1.
【０００６】冷却室２４の下部と水室１３の上部とに接
続して前記背圧水が流れる弁２８を備えた供給管２９が
設けられ、冷却室２４の上部に背圧水が排出される排出
管３０が設けられている。このような構成により、ラン
ナ３に水が流れて水車軸１，ランナ３が回転する際、水
車軸１の主軸スカート２の主軸受５での回転部は油槽１
５内の潤滑油により潤滑される。この際、潤滑油は主軸
スカート２の回転により油槽１５内を水車軸１の周りを
回転するとともに、油孔４に接する潤滑油は上向き勾配
の油孔４を回転による遠心力により昇圧されて流れ、油
孔４に連通する主軸スカート２と主軸受５との間の隙間
を流れて主軸スカート２の主軸受５での回転部を潤滑す
る。そして、主軸スカート２と主軸受５との間の隙間か
ら排出された潤滑油は、上方に向って流れた後下降して
油孔９を通り、整流板２２により伝熱フィン２１に沿っ
て流れて油槽１５内に戻って貯留される。なお、矢印は
潤滑油の流れを示す。A supply pipe 29 provided with a valve 28 through which the back pressure water flows is connected to the lower part of the cooling chamber 24 and the upper part of the water chamber 13, and the back pressure water is discharged to the upper part of the cooling chamber 24. A discharge pipe 30 is provided. With such a configuration, when water flows through the runner 3 and the water wheel shaft 1 and the runner 3 rotate, the rotating portion of the main bearing 5 of the main shaft skirt 2 of the water wheel shaft 1 has the oil tank 1
It is lubricated by the lubricating oil in 5. At this time, the lubricating oil rotates around the water wheel shaft 1 in the oil tank 15 by the rotation of the main shaft skirt 2, and the lubricating oil in contact with the oil hole 4 flows through the oil hole 4 having an upward gradient by being pressurized by centrifugal force due to the rotation. The lubricating oil flows through the gap between the main shaft skirt 2 communicating with the oil hole 4 and the main bearing 5 to lubricate the rotating portion of the main shaft skirt 2 in the main bearing 5. Then, the lubricating oil discharged from the gap between the main shaft skirt 2 and the main bearing 5 flows upward, then descends, passes through the oil holes 9, and flows along the heat transfer fins 21 by the flow straightening plate 22. The oil is returned to and stored in the oil tank 15. The arrows indicate the flow of lubricating oil.
【０００７】ところで、主軸スカート２の主軸受５での
回転により潤滑油は昇温するので、潤滑油は下記のよう
にして冷却される。ランナ３に水が流れて水車軸１，ラ
ンナ３が回転することにより、上カバー１１とランナ３
との間の背圧水は上カバー１１の流路孔１２から水室１
３に流入し、弁２８を開にした供給管２９を経て冷却室
２４に伝熱フィン２１に沿って通流する。この通流する
背圧水により油槽１５内の潤滑油は伝熱フィン２５，２
１を備えた軸受支え７の一部である油槽１５の外側側壁
を介して冷却され、軸受は冷却される。By the way, since the lubricating oil is heated by the rotation of the main shaft skirt 2 in the main bearing 5, the lubricating oil is cooled in the following manner. The water flows into the runner 3 and the water wheel shaft 1 and the runner 3 rotate, whereby the upper cover 11 and the runner 3 are rotated.
The back pressure water between the water chamber 1 and
3 and flows through the supply pipe 29 with the valve 28 opened to the cooling chamber 24 along the heat transfer fin 21. Lubricating oil in the oil tank 15 is transferred to the heat transfer fins 25, 2 by the back pressure water flowing therethrough.
The bearing is cooled via the outer side wall of the oil tank 15 which is part of the bearing support 7 with 1.
【０００８】[0008]
【発明が解決しようとする課題】上記潤滑油を冷却する
冷却水として使用される背圧水は水車に供給される河川
水であるので、冷却室２４に河川水に含まれる土砂等が
堆積しやすくなり、この土砂等の堆積により冷却能力の
低下や背圧水量の低下が生じ、潤滑油が十分に冷却され
ないという問題がある。Since the back-pressure water used as the cooling water for cooling the lubricating oil is river water supplied to the water wheel, sediments and the like contained in the river water accumulate in the cooling chamber 24. However, there is a problem that the lubricating oil is not sufficiently cooled due to a decrease in the cooling capacity and a decrease in the back pressure water amount due to the accumulation of the earth and sand.
【０００９】また、油槽内には水車軸の主軸スカートの
回転により潤滑油が水車軸の周りを回転しているが、従
来この回転流に対して伝熱フィンの有効な配置を考慮し
ていなかった。本発明の目的は、油槽内に設けられる伝
熱フィンを油槽内の潤滑油の流れに沿う配置にして伝熱
性能を向上させ、一方冷却室に背圧水に含まれる土砂等
が堆積するのを防止できるフランシス水車の潤滑油冷却
装置を提供することである。Further, although the lubricating oil rotates around the water wheel shaft in the oil tank due to the rotation of the main shaft skirt of the water wheel shaft, conventionally, the effective arrangement of the heat transfer fins has not been taken into consideration for this rotating flow. It was The object of the present invention is to improve the heat transfer performance by disposing the heat transfer fins provided in the oil tank along the flow of the lubricating oil in the oil tank, while the earth and sand contained in the back pressure water accumulate in the cooling chamber. The purpose of the present invention is to provide a lubricating oil cooling device for a Francis turbine that can prevent the above.
【００１０】[0010]
【課題を解決するための手段】上記課題を解決するため
に、本発明によれば請求項１では立軸の水車軸と、この
水車軸の下端に取付けられ、水車軸を囲む上カバーによ
り覆われるランナと、水車軸に設けられ、下部に油孔を
有する主軸スカート及びこれを前記油孔に連通する隙間
を有して支持する主軸受が浸される潤滑油を充填した水
車軸を囲む環状の油槽と、この油槽の外側側壁を囲んで
設けられ、水車軸の回転時、ランナと上カバーとの間の
背圧水が通流して前記外側側壁を介して油槽内の潤滑油
を冷却する冷却室とを備え、水車軸の回転時、油槽内の
潤滑油は前記油孔から主軸スカートと主軸受との間の隙
間に供給されて流れた後、この隙間から排出されて油槽
内に落下して貯留されるフランシス水車の潤滑油冷却装
置において、油槽内の外側側壁の上部に縦向きの伝熱フ
ィンを設け、さらに外側側壁の下部に横向きの環状の伝
熱フィンを設けるものとする。In order to solve the above problems, according to the present invention, in claim 1, a vertical water wheel shaft and an upper cover attached to the lower end of the water wheel shaft and surrounding the water wheel shaft are covered. A runner, a main shaft skirt provided on the water wheel shaft and having an oil hole in its lower part, and a main bearing supporting the same with a gap communicating with the oil hole, and an annular ring surrounding a water wheel shaft filled with lubricating oil into which a main bearing is immersed. Cooling provided around the oil tank and the outer side wall of the oil tank, and when the water wheel rotates, back pressure water flows between the runner and the upper cover to cool the lubricating oil in the oil tank through the outer side wall. When the water turbine shaft rotates, the lubricating oil in the oil tank is supplied from the oil hole to the gap between the main shaft skirt and the main bearing and flows, and then discharged from this gap and falls into the oil tank. Oil tank of the Francis turbine lubricating oil cooling device Of the heat transfer fins of vertically disposed above the outer sidewall, it intended to further provide a heat transfer fins transverse annular bottom of the outer sidewall.
【００１１】また、請求項２では上記のフランシス水車
の潤滑油冷却装置において、冷却室内に油槽の外側側壁
を囲み、上方から下方に向って背圧水が流下するら旋状
の伝熱フィンを設けるものとする。また、請求項３では
冷却室の背圧水の入口部に鉄管からの圧力水を冷却室内
に供給する弁を備えた圧力水供給管と、冷却室から排出
される背圧水が流れる排出管に背圧水の流量が所定値以
下のとき信号を出力する流水リレーとを設けるものとす
る。According to a second aspect of the present invention, in the above-described Francis turbine lubricating oil cooling device, a spiral heat transfer fin is provided which surrounds an outer side wall of the oil tank in the cooling chamber and through which back pressure water flows downward from above. Shall be provided. Further, in claim 3, a pressure water supply pipe having a valve for supplying pressure water from the iron pipe into the cooling chamber at an inlet portion of the back pressure water of the cooling chamber, and a discharge pipe through which the back pressure water discharged from the cooling chamber flows. And a running water relay that outputs a signal when the flow rate of the back pressure water is below a predetermined value.
【００１２】また、請求項４では冷却室の背圧水が流れ
る流路面積を小さくして冷却室内を流れる背圧水の流速
を大きくするものとする。Further, in the present invention, the flow passage area of the back pressure water in the cooling chamber is made small to increase the flow velocity of the back pressure water flowing in the cooling chamber.
【００１３】[0013]
【作用】以下本発明による手段の作用を請求項ごとに下
記に説明する。 請求項１ 立軸のフランシス水車において、水車軸に設けられ、下
部に油孔を有する主軸スカート及びこれを前記油孔に連
通する隙間を有して支持する主軸受は水車軸を囲む環状
の油槽内に充填された潤滑油に浸されている。この状態
で水車軸の回転時、油槽内の潤滑油は水車軸の周りを回
転しながら前記油孔から主軸スカートと主軸受との間の
隙間に供給されて流れ、潤滑作用をした後、前記隙間の
上部から排出され、この排出された潤滑油は落下して油
槽内に貯留される。The operation of the means according to the present invention will be described below for each claim. In a vertical Francis turbine, a main shaft skirt provided on a water turbine shaft and having an oil hole at a lower portion thereof and a main bearing for supporting the main shaft skirt with a gap communicating with the oil hole are provided in an annular oil tank surrounding the water turbine shaft. It is dipped in the lubricating oil filled in. In this state, when the water turbine shaft is rotated, the lubricating oil in the oil tank is supplied from the oil hole to the gap between the main shaft skirt and the main bearing while rotating around the water turbine shaft, and after flowing, it is lubricated. The lubricating oil discharged from the upper part of the gap drops and is stored in the oil tank.
【００１４】したがって、油槽内の外側側壁の上部に縦
向きの伝熱フィンを、一方外側側壁の下部に横向きの環
状の伝熱フィンを設けることにより、主軸スカートの油
孔から主軸スカートと主軸受との間の隙間に潤滑油を供
給するため、油槽内の上部の潤滑油は底部に向って下降
して流れるので、潤滑油は縦向きの伝熱フィンに沿って
流れ、この伝熱フィンを介して伝熱され、一方、油槽の
下部では潤滑油は水車軸の回転により水車軸の周りを回
転しながら主軸スカートの下部に設けられた油孔に向っ
て流れるので、潤滑油は横向きの環状の伝熱フィンに沿
って流れ、この伝熱フィンを介して伝熱される。したが
って、油槽内の潤滑油の流れに従って前述のように縦向
きの伝熱フィン，横向きの伝熱フィンを設けたことによ
り、伝熱性能は向上する。Therefore, by providing a vertical heat transfer fin on the upper portion of the outer side wall in the oil tank and a horizontal ring-shaped heat transfer fin on the lower side of the outer side wall, the main shaft skirt and the main bearing can be removed from the oil hole of the main shaft skirt. Since the lubricating oil is supplied to the gap between the oil tank and the oil tank, the lubricating oil in the upper part of the oil tank flows downward toward the bottom part, so that the lubricating oil flows along the vertical heat transfer fins. On the other hand, in the lower part of the oil tank, the lubricating oil flows toward the oil hole provided in the lower part of the main shaft skirt while rotating around the water wheel shaft by the rotation of the water wheel shaft, so that the lubricating oil is lateral Flow along the heat transfer fins and heat is transferred through the heat transfer fins. Therefore, the heat transfer performance is improved by providing the vertical heat transfer fins and the horizontal heat transfer fins as described above in accordance with the flow of the lubricating oil in the oil tank.
【００１５】請求項２ 油槽内の潤滑油を冷却するために、水車軸の回転時、上
カバーとランナとの間の背圧水が冷却水として流れる冷
却室に、油槽の外側側壁を囲み、背圧水が上方から下方
に流れるら旋状の伝熱フィンを設けることにより、背圧
水に含まれる土砂等は背圧水とともにら旋状の伝熱フィ
ンに沿って下方に流れて排出されるので、冷却室には土
砂等が堆積しない。In order to cool the lubricating oil in the oil tank, the outer side wall of the oil tank is surrounded by a cooling chamber in which back pressure water between the upper cover and the runner flows as cooling water when the water wheel shaft rotates. By providing the spiral heat transfer fins with which the back pressure water flows downward from above, the earth and sand contained in the back pressure water flows downward along with the back pressure water along the spiral heat transfer fins and is discharged. Therefore, the sediment does not accumulate in the cooling chamber.
【００１６】請求項３ 冷却室の背圧水の入口部に鉄管からの圧力水を供給する
弁を備えた圧力水供給管と、冷却室から排出される背圧
水の排出管に排出される背圧水の流量が所定値以下のと
き信号を出力する流水リレーとを設けることにより、冷
却室内に土砂等が堆積して背圧水の流量が所定値以下に
なれば、流水リレーが作動して信号を出力するので、こ
の信号により圧力水供給管に設けた弁を開にして鉄管か
らの圧力水を冷却室内に流入させ、この圧力水により冷
却室内に堆積した土砂等を排出管を経て外部に排出す
る。3. A pressure water supply pipe having a valve for supplying pressure water from an iron pipe to the back pressure water inlet of the cooling chamber, and a back pressure water discharge pipe discharged from the cooling chamber. By providing a running water relay that outputs a signal when the back pressure water flow rate is below a specified value, if the back pressure water flow rate drops below a specified value due to the accumulation of sediment in the cooling chamber, the running water relay will operate. Signal is output, the valve provided in the pressure water supply pipe is opened by this signal to allow the pressure water from the iron pipe to flow into the cooling chamber, and the sediment accumulated in the cooling chamber due to this pressure water is discharged through the discharge pipe. Discharge to the outside.
【００１７】請求項４ 冷却室内の背圧水が流れる流路面積を小さくして、背圧
水の流速を大きくすることにより、この大きな流速によ
り土砂等を背圧水とともに流出して冷却室内に土砂等が
堆積しないようにする。According to a fourth aspect of the present invention, by reducing the flow passage area through which the back pressure water flows in the cooling chamber and increasing the flow velocity of the back pressure water, the large flow velocity causes sediment and the like to flow out together with the back pressure water into the cooling chamber. Prevent sediment from accumulating.
【００１８】[0018]
【実施例】以下図面に基づいて本発明の実施例について
説明する。図１は本発明の請求項１の実施例による潤滑
油冷却装置を備えたフランシス水車の部分断面図であ
る。図１において図７の従来例と異なるのは、下記の通
りである。油槽１５の上部の外側側壁である軸受支え７
の内壁に縦向きの伝熱フィン３２を、図１のＡ−Ａ部分
断面図である図２に示すように複数列設け、さらに下部
の外側側壁である軸受支え７の内壁に複数段の横向きの
環状の伝熱フィン３３を、図１のＢ−Ｂ部分断面図であ
る図３に示すように取付けている。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partial cross-sectional view of a Francis turbine equipped with a lubricating oil cooling device according to the first embodiment of the present invention. 1 is different from the conventional example of FIG. 7 in the following points. Bearing support 7 which is the outer side wall of the upper part of the oil tank 15.
2 are provided in a plurality of rows on the inner wall of the bearing as shown in FIG. 2 which is a partial sectional view taken along the line AA of FIG. The annular heat transfer fin 33 is attached as shown in FIG. 3 which is a partial sectional view taken along line BB of FIG.
【００１９】このような構成により、主軸スカート２と
主軸受５との間の隙間から排出される潤滑油は、前述の
ように油孔９を通って油槽１５内に流れ落ち、油槽１５
の上部では回転しながら下降流となって縦向きの伝熱フ
ィン３２に沿って流れ、一方下部では回転しながら主軸
スカート２の油孔４に流入するので、下部の潤滑油は横
向きの伝熱フィン３３に沿って流れ、このため伝熱フィ
ン３２，３３による伝熱性能が増大し、冷却室２４を流
れる背圧水により潤滑油は十分に冷却される。With such a structure, the lubricating oil discharged from the gap between the main shaft skirt 2 and the main bearing 5 flows into the oil tank 15 through the oil hole 9 as described above, and the oil tank 15
In the upper part of the shaft, it flows down along the heat transfer fins 32 in the vertical direction while rotating, while in the lower part, it flows into the oil holes 4 of the main shaft skirt 2 while rotating, so that the lubricating oil in the lower part is transferred in the horizontal direction. Flowing along the fins 33, the heat transfer performance of the heat transfer fins 32, 33 is increased, and the back pressure water flowing through the cooling chamber 24 sufficiently cools the lubricating oil.
【００２０】図４は本発明の請求項２の実施例によるフ
ランシス水車の潤滑油冷却装置の冷却室の断面図であ
る。図４において従来例と異なるのは、冷却室２４内に
縦向きの伝熱フィンの代りに油槽１５の外側側壁である
軸受支え７を囲むら旋状の伝熱フィン３４を設けるとと
もに、冷却室２４の背圧水の入口を上部にして背圧水の
供給管２９を設け、冷却室２４の背圧水の出口を下部に
して背圧水の排出管３０を設けたことである。FIG. 4 is a sectional view of a cooling chamber of a lubricating oil cooling device for a Francis turbine according to a second embodiment of the present invention. 4 is different from the conventional example in that the helical heat transfer fins 34 surrounding the bearing support 7, which is the outer side wall of the oil tank 15, are provided in the cooling chamber 24 instead of the vertically oriented heat transfer fins, and The back pressure water supply pipe 29 is provided with the back pressure water inlet of 24 as the upper part, and the back pressure water discharge pipe 30 is provided with the back pressure water outlet of the cooling chamber 24 as the lower part.
【００２１】このような構成により、土砂等を含む背圧
水は供給管２９を経て冷却室２４内に流入し、ら旋状の
伝熱フィン３４に沿って旋回しながら流下し、排出管３
０から排出されるので、ら旋状の伝熱フィン３４を介し
て伝熱されるとともに、背圧水に含まれる土砂等はら旋
状の伝熱フィン３４に沿って流れ落ち、排出管３０から
排出され、このため冷却室２４内には土砂等の堆積を防
止できる。With such a structure, the back pressure water containing soil and the like flows into the cooling chamber 24 through the supply pipe 29, flows down while swirling along the spiral heat transfer fins 34, and the discharge pipe 3
Since it is discharged from No. 0, the heat is transferred through the spiral heat transfer fins 34, and the earth and sand contained in the back pressure water flows down along the spiral heat transfer fins 34 and is discharged from the discharge pipe 30. Therefore, it is possible to prevent the accumulation of earth and sand in the cooling chamber 24.
【００２２】図５は本発明の請求項３の実施例によるフ
ランシス水車の潤滑油冷却装置の冷却室に給排する背圧
水の系統図である。図５において図７の従来例と異なる
のは、背圧水の供給管２９に弁３５を備えて鉄管からの
圧力水を供給する圧力水供給管３６を接続し、さらに背
圧水の排出管３０に背圧水の流量が所定値以下のとき信
号を出力する流水リレー３７を設けたことである。FIG. 5 is a system diagram of back pressure water supplied to and discharged from the cooling chamber of the lubricating oil cooling device of the Francis turbine according to the third embodiment of the present invention. 5 is different from the conventional example of FIG. 7 in that a back pressure water supply pipe 29 is provided with a valve 35 and a pressure water supply pipe 36 for supplying pressure water from an iron pipe is connected to the back pressure water supply pipe 29. 30 is provided with a running water relay 37 that outputs a signal when the flow rate of the back pressure water is less than or equal to a predetermined value.
【００２３】このような構成により、冷却室２４に通流
する背圧水に含まれる土砂等が冷却室２４内に堆積した
ときには、冷却室２４内を流れる流量が低下するので、
背圧水の流量が土砂等の堆積を示す所定値以下になれば
流水リレー３７が作動し、信号を発する。したがって、
この信号により弁３５を開にすれば鉄管からの圧力水が
圧力水供給管３６を経て供給管２９から冷却室２４内に
流入し、この圧力水により堆積した土砂等を流出させて
排出管３０から外部に排出する。With such a structure, when earth and sand contained in the back pressure water flowing through the cooling chamber 24 is accumulated in the cooling chamber 24, the flow rate of the cooling chamber 24 is reduced.
When the flow rate of the back pressure water becomes equal to or less than a predetermined value indicating the accumulation of earth and sand, the running water relay 37 is activated and a signal is emitted. Therefore,
When the valve 35 is opened by this signal, the pressure water from the iron pipe flows from the supply pipe 29 into the cooling chamber 24 via the pressure water supply pipe 36, and the sediments and the like accumulated by the pressure water flow out and the discharge pipe 30 is discharged. To the outside.
【００２４】なお、土砂等の排出が終了すれば弁３５を
閉にして通常の背圧水の流れにする。図６は本発明の請
求項４の実施例によるフランシス水車の潤滑油冷却装置
の冷却室の断面図である。図６において図７の従来例と
異なるのは、冷却室２４内を伝熱フィン３８に沿って上
向きに流れる流路面積を小さくしたことである。When the discharge of the earth and sand is completed, the valve 35 is closed to allow the normal back pressure water flow. FIG. 6 is a sectional view of a cooling chamber of a lubricating oil cooling device for a Francis turbine according to an embodiment of claim 4 of the present invention. 6 differs from the conventional example of FIG. 7 in that the flow passage area that flows upward in the cooling chamber 24 along the heat transfer fins 38 is reduced.
【００２５】このような構成により、供給管２９から冷
却室２４内に流入する背圧水の流速は流路面積が小さい
ため大きくなって冷却室２４内を流れるので、この大き
い流速により背圧水に含まれる土砂等は背圧水とともに
運ばれて排出管３０から外部に排出され、このため冷却
室２４内に土砂等が堆積するのが防止される。With this configuration, the flow velocity of the back pressure water flowing from the supply pipe 29 into the cooling chamber 24 increases due to the small flow passage area and flows in the cooling chamber 24. The soil and the like contained in the above are carried together with the back pressure water and discharged to the outside from the discharge pipe 30, so that the sediment and the like are prevented from accumulating in the cooling chamber 24.
【００２６】[0026]
【発明の効果】以上の説明から明らかなように、本発明
によれば前述の構成により、請求項１では油槽内の伝熱
フィンを上部と下部とで異なる向きの伝熱フィンを設け
たので、油槽内の伝熱性能を向上させ、潤滑油の冷却効
果が向上する。請求項２では冷却室内にら旋状の伝熱フ
ィンを設けたので、背圧水に含まれる土砂等はら旋状の
伝熱フィンに沿って流れ落ち外部に排出するので、土砂
等の堆積を防止する。請求項３では冷却室内に土砂等が
堆積したとき、冷却室からの背圧水の流量を流水リレー
で検出し、流量の所定値以下のとき出力する信号によ
り、鉄管からの圧力水を冷却室に流入させて堆積した土
砂等を冷却室外に排出できる。請求項４では冷却室の背
圧水の流路面積を小さくして背圧水の流速を大きくした
ので、この大きな流速により土砂等を背圧水とともに外
部に排出して、冷却室内に土砂等が堆積するのを防止で
きる。As is apparent from the above description, according to the present invention, the heat transfer fins in the oil tank are provided in different directions in the upper part and the lower part according to the above structure. The heat transfer performance in the oil tank is improved, and the cooling effect of the lubricating oil is improved. In claim 2, since the spiral heat transfer fins are provided in the cooling chamber, the earth and sand contained in the back pressure water flows down along the spiral heat transfer fins and is discharged to the outside, so that the accumulation of earth and sand and the like is prevented. To do. In claim 3, when sediment etc. is accumulated in the cooling chamber, the flow rate of the back pressure water from the cooling chamber is detected by the flowing water relay, and the pressure water from the iron pipe is output by a signal output when the flow rate is below a predetermined value. It is possible to discharge the earth and sand accumulated by flowing into the outside of the cooling chamber. In claim 4, since the flow area of the back pressure water in the cooling chamber is made small and the flow velocity of the back pressure water is made large, earth and sand and the like are discharged to the outside together with the back pressure water by this large flow velocity, and the sand and the like in the cooling chamber. Can be prevented from accumulating.
【図１】本発明の請求項１の実施例による潤滑油冷却装
置を備えたフランシス水車の部分断面図FIG. 1 is a partial cross-sectional view of a Francis turbine equipped with a lubricating oil cooling device according to an embodiment of claim 1 of the present invention.
【図２】図１のＡ−Ａ部分断面図FIG. 2 is a partial sectional view taken along the line AA of FIG.
【図３】図１のＢ−Ｂ部分断面図FIG. 3 is a partial sectional view taken along line BB of FIG.
【図４】本発明の請求項２の実施例によるフランシス水
車の潤滑油冷却装置のら旋状の伝熱フィンを設けた冷却
室の部分断面図FIG. 4 is a partial sectional view of a cooling chamber provided with spiral heat transfer fins of a lubricating oil cooling device for a Francis turbine according to an embodiment of claim 2 of the present invention.
【図５】本発明の請求項３の実施例によるフランシス水
車の潤滑油冷却装置の冷却室に鉄管からの圧力水を供給
する配管を設けた系統図FIG. 5 is a system diagram in which a pipe for supplying pressure water from an iron pipe is provided to a cooling chamber of a lubricating oil cooling device of a Francis turbine according to an embodiment of claim 3 of the present invention.
【図６】本発明の請求項４の実施例によるフランシス水
車の潤滑油冷却装置の背圧水の流路面積を小さくした冷
却室の部分断面図FIG. 6 is a partial cross-sectional view of a cooling chamber in which a passage area of back pressure water of a lubricating oil cooling device for a Francis turbine according to an embodiment of claim 4 of the present invention is reduced.
【図７】従来の潤滑油冷却装置を備えたフランシス水車
の部分断面図FIG. 7 is a partial cross-sectional view of a Francis turbine equipped with a conventional lubricating oil cooling device.
１ 水車軸 ２ 主軸スカート ４ 油孔 ５ 主軸受 ７ 軸受支え １５ 油槽 ２４ 冷却室 ３２ 伝熱フィン ３３ 伝熱フィン ３４ ら旋状の伝熱フィン ３５ 弁 ３６ 圧力水供給管 ３７ 流水リレー 1 Water Turbine Shaft 2 Spindle Skirt 4 Oil Hole 5 Main Bearing 7 Bearing Support 15 Oil Tank 24 Cooling Chamber 32 Heat Transfer Fin 33 Heat Transfer Fin 34 Helical Heat Transfer Fin 35 Valve 36 Pressure Water Supply Pipe 37 Water Flow Relay
Claims (4)
けられ、水車軸を囲む上カバーにより覆われるランナ
と、水車軸に設けられ、下部に油孔を有する主軸スカー
ト及びこれを前記油孔に連通する隙間を有して支持する
主軸受が浸される潤滑油を充填した水車軸を囲む環状の
油槽と、この油槽の外側側壁を囲んで設けられ、水車軸
の回転時、ランナと上カバーとの間の背圧水が通流して
前記外側側壁を介して油槽内の潤滑油を冷却する冷却室
とを備え、水車軸の回転時、油槽内の潤滑油は前記油孔
から主軸スカートと主軸受との間の隙間に供給されて流
れた後、この隙間から排出されて油槽内に落下して貯留
されるフランシス水車の潤滑油冷却装置において、油槽
内の外側側壁の上部に縦向きの伝熱フィンを設け、さら
に前記外側側壁の下部に横向きの環状の伝熱フィンを設
けたことを特徴とするフランシス水車の潤滑油冷却装
置。1. A vertical turbine shaft, a runner attached to the lower end of the turbine shaft and covered by an upper cover surrounding the turbine shaft, a main shaft skirt provided on the turbine shaft and having an oil hole in the lower portion thereof, and A ring-shaped oil tank that encloses a turbine shaft filled with lubricating oil, in which a main bearing that supports the oil hole is immersed, and an outer side wall of the oil tank that is provided to surround the oil tank. And a back cover between the upper cover and a cooling chamber for cooling the lubricating oil in the oil tank through the outer side wall through the outer side wall, the lubricating oil in the oil tank from the oil hole during rotation of the water axle. In the lubricating oil cooling device of the Francis turbine, which is supplied to the gap between the main shaft skirt and the main bearing, flows, then is discharged from this gap and falls and is stored in the oil tank, in the upper part of the outer side wall in the oil tank. A vertical heat transfer fin is provided, and further below the outer side wall. Lubricating oil cooling device Francis turbine, characterized in that a heat transfer fins of lateral annular.
けられ、水車軸を囲む上カバーにより覆われるランナ
と、水車軸に設けられ、下部に油孔を有する主軸スカー
ト及びこれを前記油孔に連通する隙間を有して支持する
主軸受が浸される潤滑油を充填した水車軸を囲む環状の
油槽と、この油槽の外側側壁を囲んで設けられ、水車軸
の回転時、ランナと上カバーとの間の背圧水が通流して
前記外側側壁を介して油槽内の潤滑油を冷却する冷却室
とを備え、水車軸の回転時、油槽内の潤滑油は前記油孔
から主軸スカートと主軸受との間の隙間に供給されて流
れた後、この隙間から排出されて油槽内に落下して貯留
されるフランシス水車の潤滑油冷却装置において、前記
冷却室内に油槽の外側側壁を囲み、上方から下方に向っ
て背圧水が流下するら旋状の伝熱フィンを設けたことを
特徴とするフランシス水車の潤滑油冷却装置。2. A vertical turbine shaft, a runner attached to the lower end of the turbine shaft and covered by an upper cover surrounding the turbine shaft, a main shaft skirt provided on the turbine shaft and having an oil hole in the lower portion, and A ring-shaped oil tank that encloses a turbine shaft filled with lubricating oil, in which a main bearing that supports the oil hole is immersed, and an outer side wall of the oil tank that is provided to surround the oil tank. And a back cover between the upper cover and a cooling chamber for cooling the lubricating oil in the oil tank through the outer side wall through the outer side wall, the lubricating oil in the oil tank from the oil hole during rotation of the water axle. In a lubricating oil cooling device for a Francis turbine, which is supplied to a gap between a main shaft skirt and a main bearing and flows, then discharged from this gap and dropped and stored in an oil tank, in an outer side wall of the oil tank in the cooling chamber. Back pressure water flows downward from above Lubricating oil cooling device Francis turbine, characterized in that a heat transfer fins of spiral.
けられ、水車軸を囲む上カバーにより覆われるランナ
と、水車軸に設けられ、下部に油孔を有する主軸スカー
ト及びこれを前記油孔に連通する隙間を有して支持する
主軸受が浸される潤滑油を充填した水車軸を囲む環状の
油槽と、この油槽の外側側壁を囲んで設けられ、水車軸
の回転時、ランナと上カバーとの間の背圧水が通流して
前記外側側壁を介して油槽内の潤滑油を冷却する冷却室
とを備え、水車軸の回転時、油槽内の潤滑油は前記油孔
から主軸スカートと主軸受との間の隙間に供給されて流
れた後、この隙間から排出されて油槽内に落下して貯留
されるフランシス水車の潤滑油冷却装置において、前記
冷却室の背圧水の入口部に鉄管からの圧力水を冷却室内
に供給する弁を備えた圧力水供給管と、冷却室から排出
される背圧水が流れる排出管に背圧水の流量が所定値以
下のとき信号を出力する流水リレーとを備えたことを特
徴とするフランシス水車の潤滑油冷却装置。3. A vertical turbine shaft, a runner attached to the lower end of the turbine shaft and covered by an upper cover surrounding the turbine shaft, a main shaft skirt provided on the turbine shaft and having an oil hole in the lower portion, and A ring-shaped oil tank that encloses a turbine shaft filled with lubricating oil, in which a main bearing that supports the oil hole is immersed, and an outer side wall of the oil tank that is provided to surround the oil tank. And a back cover between the upper cover and a cooling chamber for cooling the lubricating oil in the oil tank through the outer side wall through the outer side wall, the lubricating oil in the oil tank from the oil hole during rotation of the water axle. In the lubricating oil cooling device of the Francis turbine, which is supplied to the gap between the main shaft skirt and the main bearing and flows, and then discharged from this gap and dropped and stored in the oil tank, the back pressure water of the cooling chamber is stored. The inlet is equipped with a valve that supplies pressure water from the iron pipe into the cooling chamber. Lubrication of Francis turbine, which is equipped with a pressure water supply pipe and a running water relay that outputs a signal when the flow rate of the back pressure water is below a predetermined value in the discharge pipe through which the back pressure water discharged from the cooling chamber flows. Oil cooling system.
けられ、水車軸を囲む上カバーにより覆われるランナ
と、水車軸に設けられ、下部に油孔を有する主軸スカー
ト及びこれを前記油孔に連通する隙間を有して支持する
主軸受が浸される潤滑油を充填した水車軸を囲む環状の
油槽と、この油槽の外側側壁を囲んで設けられ、水車軸
の回転時、ランナと上カバーとの間の背圧水が通流して
前記外側側壁を介して油槽内の潤滑油を冷却する冷却室
とを備え、水車軸の回転時、油槽内の潤滑油は前記油孔
から主軸スカートと主軸受との間の隙間に供給されて流
れた後、この隙間から排出されて油槽内に落下して貯留
されるフランシス水車の潤滑油冷却装置において、冷却
室内の背圧水の流路面積を小さくして背圧水の流速を大
きくしたことを特徴とするフランシス水車の潤滑油冷却
装置。4. A vertical turbine shaft, a runner attached to the lower end of the turbine shaft and covered by an upper cover surrounding the turbine shaft, a main shaft skirt provided on the turbine shaft and having an oil hole in its lower portion, and A ring-shaped oil tank that encloses a turbine shaft filled with lubricating oil, in which a main bearing that supports the oil hole is immersed, and an outer side wall of the oil tank that is provided to surround the oil tank. And a back cover between the upper cover and a cooling chamber for cooling the lubricating oil in the oil tank through the outer side wall through the outer side wall, the lubricating oil in the oil tank from the oil hole during rotation of the water axle. In the lubricating oil cooling device of the Francis turbine, which is supplied to the gap between the main shaft skirt and the main bearing, flows, then is discharged from this gap and is stored in the oil tank. Characterized by reducing the road area and increasing the flow velocity of back pressure water Lubricating oil cooling device Francis turbine to be.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02293694A JP3334012B2 (en) | 1994-02-22 | 1994-02-22 | Lubricating oil cooling system for Francis turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02293694A JP3334012B2 (en) | 1994-02-22 | 1994-02-22 | Lubricating oil cooling system for Francis turbine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07233775A true JPH07233775A (en) | 1995-09-05 |
| JP3334012B2 JP3334012B2 (en) | 2002-10-15 |
Family
ID=12096525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02293694A Expired - Fee Related JP3334012B2 (en) | 1994-02-22 | 1994-02-22 | Lubricating oil cooling system for Francis turbine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3334012B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100832089B1 (en) * | 2007-04-25 | 2008-05-27 | 권오경 | Oil cooling device for generator shaft bearing |
| CN110985867A (en) * | 2019-12-24 | 2020-04-10 | 刘洋 | Self-lubricating system for dam hydroelectric power generation |
| CN115111267A (en) * | 2022-06-08 | 2022-09-27 | 华能花凉亭水电有限公司 | Water guide bearing structure of mixed-flow water turbine |
-
1994
- 1994-02-22 JP JP02293694A patent/JP3334012B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100832089B1 (en) * | 2007-04-25 | 2008-05-27 | 권오경 | Oil cooling device for generator shaft bearing |
| CN110985867A (en) * | 2019-12-24 | 2020-04-10 | 刘洋 | Self-lubricating system for dam hydroelectric power generation |
| CN115111267A (en) * | 2022-06-08 | 2022-09-27 | 华能花凉亭水电有限公司 | Water guide bearing structure of mixed-flow water turbine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3334012B2 (en) | 2002-10-15 |
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