JPH045826B2 - - Google Patents
Info
- Publication number
- JPH045826B2 JPH045826B2 JP61096276A JP9627686A JPH045826B2 JP H045826 B2 JPH045826 B2 JP H045826B2 JP 61096276 A JP61096276 A JP 61096276A JP 9627686 A JP9627686 A JP 9627686A JP H045826 B2 JPH045826 B2 JP H045826B2
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- heat
- thrust
- shaft
- rotating shaft
- 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 - Lifetime
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 15
- 239000012530 fluid Substances 0.000 description 12
- 238000001704 evaporation Methods 0.000 description 11
- 230000008020 evaporation Effects 0.000 description 11
- 239000003921 oil Substances 0.000 description 6
- 239000010687 lubricating oil Substances 0.000 description 5
- 230000004907 flux Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 1
- 235000012489 doughnuts Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Hydraulic Turbines (AREA)
Description
【発明の詳細な説明】
〔発明の属する技術分野〕
この発明は、横軸水車発電機のスラスト軸受の
冷却に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention pertains] The present invention relates to cooling of a thrust bearing of a horizontal-shaft water turbine generator.
約1000kw以上の横軸水車発電機の軸受の冷却
は通常水冷のオイルクーラによつて潤滑油を冷却
し潤滑油を循環ポンプによつて循環している。第
５図はジヤーナル軸受１およびスラスト軸受３を
備えた従来の横軸水車発電機の水冷オイルクーラ
による軸受冷却装置を示し、ジヤーナル軸受１お
よびスラスト軸受３から発生する熱は、潤滑油５
に吸収される。熱を吸収した潤滑油は別置された
給水ポンプ１３および給水配管１４を備えた水冷
オイルクーラー１０で冷却されジヤーナル軸受お
よびスラスト軸受へ循環される。
To cool the bearings of horizontal-shaft water turbine generators of approximately 1,000 kW or more, the lubricating oil is normally cooled by a water-cooled oil cooler and then circulated by a circulation pump. FIG. 5 shows a bearing cooling system using a water-cooled oil cooler for a conventional horizontal shaft turbine generator equipped with a journal bearing 1 and a thrust bearing 3.
absorbed into. The lubricating oil that has absorbed the heat is cooled by a water-cooled oil cooler 10 equipped with a water supply pump 13 and a water supply pipe 14, which are provided separately, and is circulated to the journal bearing and the thrust bearing.
しかし軸受潤滑油の冷却に水冷オイルクーラ１
０を使用すると、給水ポンプ１３、給水配管１
４、循環ポンプ１１および油配管１２等の高価な
設備が必要となり、これ等の設備の保守・点検に
労力を要する欠点があつた。また汚れた冷却水を
使用すれば、給水配管１４に目づまりを生じた
り、給水配管１４に腐食を生じて漏水事故を発生
することがあつた。第５図において２は軸受スタ
ンド、４は回転軸、６はランナー、７は回転軸ヒ
ートパイプ、８は蒸発空間、２０は作動液、２２
はスラストカラーである。 However, water-cooled oil cooler 1 is used to cool bearing lubricating oil.
If 0 is used, water supply pump 13, water supply pipe 1
4. Expensive equipment such as the circulation pump 11 and oil piping 12 is required, and maintenance and inspection of these equipment requires labor. Further, if dirty cooling water is used, the water supply pipe 14 may become clogged or corroded, resulting in a water leakage accident. In Fig. 5, 2 is a bearing stand, 4 is a rotating shaft, 6 is a runner, 7 is a rotating shaft heat pipe, 8 is an evaporation space, 20 is a working fluid, 22
is the thrust color.
第６図は従来例による横軸水車発電機の回転軸
ヒートパイプを利用した軸受冷却装置を示し、回
転軸４の内部を中空として作動液２０を封入し、
軸受側を発熱部としランナー６の蒸発空間８を冷
却部とするヒートパイプを形成している。 FIG. 6 shows a conventional bearing cooling device using a rotary shaft heat pipe of a horizontal-shaft water turbine generator, in which the rotary shaft 4 is hollow and filled with a working fluid 20.
A heat pipe is formed in which the bearing side serves as a heat generating section and the evaporation space 8 of the runner 6 serves as a cooling section.
第６図において、ジヤーナル軸受１およびスラ
スト軸受３で発生した熱の大部分は回転軸ヒート
パイプ７へ熱が流入するが、この際スラスト軸受
３は
発熱部とヒートパイプ蒸発面までの熱伝導の
距離が長い。 In Fig. 6, most of the heat generated in the journal bearing 1 and the thrust bearing 3 flows into the rotating shaft heat pipe 7, but in this case, the thrust bearing 3 is responsible for the heat conduction between the heat generating part and the heat pipe evaporation surface. The distance is long.
スラストカラー２２内の熱伝導およびヒート
パイプ蒸発面での熱流束（Ｗ／cm2）が大きい。 Heat conduction within the thrust collar 22 and heat flux (W/cm 2 ) at the heat pipe evaporation surface are large.
スラストカラー２２は通常厚さが一様に設計
するため、スラストカラー２２の発熱部から回
転軸の中心部へ向うにしたがい熱伝導面積が小
さくなるとともに、蒸発面の面積も小さくな
る。これらによりスラストカラーの発熱部から
ヒートパイプ表面までの熱抵抗の増大（温度差
が大きくなる）とヒートパイプの蒸発面での熱
流束が大きくなることによる熱抵抗の増大によ
り温度が大きくなることで、軸受部の温度が許
容値以上となるため、出力約500kW以上の横
軸水車発電機の軸受冷却への適用は困難であつ
た。 Since the thrust collar 22 is usually designed to have a uniform thickness, the heat conduction area becomes smaller from the heat generating part of the thrust collar 22 toward the center of the rotating shaft, and the area of the evaporation surface also becomes smaller. As a result, the temperature increases due to an increase in thermal resistance from the heat generating part of the thrust collar to the heat pipe surface (increasing the temperature difference) and an increase in thermal resistance due to an increase in heat flux at the evaporation surface of the heat pipe. Since the temperature of the bearing exceeds the allowable value, it has been difficult to apply this method to cooling the bearings of horizontal-shaft turbine generators with an output of approximately 500 kW or more.
この発明は、横軸水車発電機のジヤーナル軸受
およびスラスト軸受から発生する熱を回転軸ヒー
トパイプを介して冷却するときに、スラストカラ
ー内部の熱伝導抵抗の低減とヒートパイプの蒸発
面での熱抵抗を低減しフラスト軸受温度を許容値
以下とすることを目的とする。
This invention aims to reduce the heat conduction resistance inside the thrust collar and reduce the amount of heat generated on the evaporation surface of the heat pipe when the heat generated from the journal bearing and thrust bearing of a horizontal shaft turbine generator is cooled through the rotating shaft heat pipe. The purpose is to reduce resistance and keep the frust bearing temperature below the allowable value.
上気目的達成のため本発明によれば、横軸水車
発電機のスラスト軸受のためスラストカラーに中
空部を設け、前記中空部を回転軸ヒートパイプの
発熱部の蒸気空間に連通させたことによつて達成
される。
To achieve the above purpose, according to the present invention, a hollow part is provided in the thrust collar for the thrust bearing of the horizontal shaft water turbine generator, and the hollow part is communicated with the steam space of the heat generating part of the rotary shaft heat pipe. It is achieved by doing so.
第１図は本発明の実施例による横軸水車発電機
の軸受冷却装置の断面図、第２図は第１図の軸受
冷却装置のスラストカラーを示す詳細図、第３図
は第２図のＡ−Ａ方向断面図、第３図は本発明の
他の実施例による軸受冷却装置のスラストカラー
の断面図であり、第５図、第６図と同じ部位は同
じ番号を付してある。
FIG. 1 is a sectional view of a bearing cooling device for a horizontal shaft water turbine generator according to an embodiment of the present invention, FIG. 2 is a detailed view showing the thrust collar of the bearing cooling device of FIG. 1, and FIG. 3 is a sectional view of a thrust collar of a bearing cooling device according to another embodiment of the present invention, and the same parts as in FIGS. 5 and 6 are given the same numbers.
以下図面に基いて説明する。第１図において、
ランナー６と直結する回転軸４がケーシングを貫
通し、回転軸４を軸受スタンド２に収容されたジ
ヤーナル軸受１およびスラスト軸受３により水平
に支持し、回転軸の他端には図示されない発電機
を結合している。軸受スタンド２には潤滑油５を
封入している。回転軸４を中空とし作動液２０を
封入しジヤーナル軸受１およびスラスト軸受３を
発熱部とし水路に露出するランナー６を凝縮部と
する回転軸ヒートパイプ７を形成し、スラスト軸
受３のスラストカラー２２に中空部９を設けこの
中空部９を回転軸ヒートパイプの発熱部と連通さ
せている。１５はケーシング、１６はスピードリ
ング、１７はガイドベーン、１８は吸出し管であ
る。 This will be explained below based on the drawings. In Figure 1,
A rotating shaft 4 directly connected to the runner 6 passes through the casing, and is horizontally supported by a journal bearing 1 and a thrust bearing 3 housed in a bearing stand 2. A generator (not shown) is mounted at the other end of the rotating shaft. are combined. The bearing stand 2 is filled with lubricating oil 5. A rotary shaft heat pipe 7 is formed in which the rotary shaft 4 is made hollow and a working fluid 20 is sealed, the journal bearing 1 and the thrust bearing 3 are heat generating parts, and the runner 6 exposed to the waterway is a condensing part. A hollow portion 9 is provided in the rotary shaft heat pipe, and this hollow portion 9 is communicated with the heat generating portion of the rotating shaft heat pipe. 15 is a casing, 16 is a speed ring, 17 is a guide vane, and 18 is a suction pipe.
第２図において、回転軸４はジヤーナル軸受１
およびスラスト軸受３で支持され、スラストカラ
ー２２に中空部９を設け、この中空部９を発熱部
の蒸発空間８と１箇所または複数箇所の放射状に
設けた作動流体通路１９で連通させている。この
スラストカラー２２の中空部は第３図に示すよう
に断面がドーナツ形状をしていて、スラストカラ
ー２２を内部に中空部９を設け、中空部９を８本
の作動流体通路１９によつて蒸発空間８と連通し
ている。２３は中空部密閉用ふたであり、中空部
をドーナツ形状とすることによつて伝熱面積を大
きくした。 In FIG. 2, the rotating shaft 4 is a journal bearing 1.
The thrust collar 22 is supported by a thrust bearing 3, and a hollow portion 9 is provided in the thrust collar 22, and this hollow portion 9 is communicated with the evaporation space 8 of the heat generating portion through one or more working fluid passages 19 provided radially. The hollow portion of the thrust collar 22 has a donut-shaped cross section as shown in FIG. It communicates with the evaporation space 8. 23 is a lid for sealing the hollow part, and the heat transfer area is increased by making the hollow part into a donut shape.
また第４図は本発明の他の実施例によるスラス
トカラーの断面図で、スラストカラー２２内に中
空部９および作動流体通路１９を放射状に蒸発部
に連通させたものである。 FIG. 4 is a sectional view of a thrust collar according to another embodiment of the present invention, in which a hollow portion 9 and a working fluid passage 19 are radially communicated with an evaporation portion within a thrust collar 22.
回転軸４がスラスト力を受けスラスト軸受３と
スラストカラー２２が摩擦により発熱すると、ス
ラスト軸受のパツド部の熱は潤滑油５に伝えら
れ、一方中空部の熱は回転軸ヒートパイプ７の表
面に伝達されさらにランナーに達して放熱すると
ともに、軸受スタンドの外表面から空中に放熱す
る。スラスト軸受のスラストカラー２２が発熱す
ると熱は作動液２０側の伝熱面（内径側）に伝え
られこの面から作動液２０が熱を受けて蒸発す
る。この蒸気はスラスト軸受の中空部から作動流
体通路１９を通つて圧力の低い蒸気空間８へ蒸気
が流れ、さらに温度の低いランナー側へと移動す
る。移動した蒸気はランナ側の凝縮部の壁面に接
して凝縮して液体となる。この液体は遠心力によ
りスラストカラー２２側へ戻される。作動液は常
時スラストカラーの中空部９を満す量を真空封入
する。ジヤーナル軸受１の熱は作動液を蒸発させ
凝縮部で凝縮させるように構成してある。凝縮部
は回転軸ヒートパイプのランナー突出部、ランナ
ーボス部およびランナボスシール部等からなりこ
れ等の周りの流水により冷却される。 When the rotating shaft 4 receives a thrust force and generates heat due to friction between the thrust bearing 3 and the thrust collar 22, the heat in the pad part of the thrust bearing is transferred to the lubricating oil 5, while the heat in the hollow part is transferred to the surface of the rotating shaft heat pipe 7. The heat is transmitted, reaches the runner, and is radiated, and the heat is radiated into the air from the outer surface of the bearing stand. When the thrust collar 22 of the thrust bearing generates heat, the heat is transmitted to the heat transfer surface (inner diameter side) on the side of the working fluid 20, and the working fluid 20 receives heat from this surface and evaporates. This steam flows from the hollow part of the thrust bearing through the working fluid passage 19 to the steam space 8 where the pressure is low, and further moves to the runner side where the temperature is low. The moved vapor comes into contact with the wall of the condensing section on the runner side and condenses into liquid. This liquid is returned to the thrust collar 22 side by centrifugal force. The hydraulic fluid is vacuum sealed in an amount that always fills the hollow part 9 of the thrust collar. The heat of the journal bearing 1 is configured to evaporate the working fluid and condense it in the condensing section. The condensing section consists of a runner protrusion, a runner boss, a runner boss seal, etc. of the rotating shaft heat pipe, and is cooled by flowing water around these.
この発明によれば、スラスト軸受のスラストカ
ラーに中空部を設け、前記中空部を回転軸ヒート
パイプの発熱部の蒸気空間に連通させることによ
つて、スラストカラーに発生する熱をスラストカ
ラーの発面から中空部迄の短い距離と伝熱面積の
大きな中空部および作動流体通路を熱伝導で伝え
ればよく、かつ回転軸ヒートパイプの発熱部の蒸
発面積を大きくできることによつて熱流束を小さ
くし発熱部の熱抵抗を低減できる。これによつて
スラストカラー２２の温度を許容値以下に下げる
ことができ、したがつて出力級500kW以上の横
軸水車発電機、または横軸ポンプなどのスラスト
軸受冷却を可能とするとともに、冷却効率を高め
軸受の信頼性を向上させることができる。
According to this invention, the thrust collar of the thrust bearing is provided with a hollow portion, and the hollow portion is communicated with the steam space of the heat generating portion of the rotating shaft heat pipe, thereby transferring the heat generated in the thrust collar. Heat can be transmitted by conduction through the short distance from the surface to the hollow part, the hollow part with a large heat transfer area, and the working fluid passage, and the heat flux can be reduced by increasing the evaporation area of the heat generating part of the rotating shaft heat pipe. Thermal resistance of the heat generating part can be reduced. This allows the temperature of the thrust collar 22 to be lowered below the allowable value, making it possible to cool the thrust bearings of horizontal shaft water turbine generators with an output class of 500 kW or more, or horizontal shaft pumps, etc., as well as improving cooling efficiency. can improve the reliability of bearings.
第１図は本発明の実施例による横軸水車発電機
の軸受冷却装置の断面図、第２図は第１図の軸受
冷却装置のスラストカラーを示す詳細図、第３図
は第２図のＡ−Ａ方向断面図、第４図は本発明の
他の実施例による軸受冷却装置のスラストカラー
の断面図、第５図は従来の横軸水車発電機の水冷
オイルクーラーによる軸受冷却装置の断面図、第
６図は従来の横軸水車発電機の回転軸ヒートパイ
プを利用した軸受冷却装置の断面図である。
１；ジヤーナル軸受、３；スラスト軸受、４；
回転軸、６；ランナー、７；回転軸ヒートパイ
プ、８；蒸気空間、９；中空部、１９；作動流体
通路、２２；スラストカラー。
FIG. 1 is a sectional view of a bearing cooling device for a horizontal shaft water turbine generator according to an embodiment of the present invention, FIG. 2 is a detailed view showing the thrust collar of the bearing cooling device of FIG. 1, and FIG. 4 is a cross-sectional view of a thrust collar of a bearing cooling device according to another embodiment of the present invention, and FIG. 5 is a cross-sectional view of a bearing cooling device using a water-cooled oil cooler of a conventional horizontal shaft turbine generator. 6 are cross-sectional views of a conventional bearing cooling device using a rotary shaft heat pipe of a horizontal shaft water turbine generator. 1; journal bearing, 3; thrust bearing, 4;
Rotating shaft, 6; Runner, 7; Rotating shaft heat pipe, 8; Steam space, 9; Hollow portion, 19; Working fluid passage, 22; Thrust collar.
Claims (1)
のジヤーナル軸受およびスラスト軸受により水平
に支承され、前記回転軸の内部に前記ジヤーナル
軸受およびスラスト軸受を発熱部とし、水路に露
出するランナーを凝縮部とする回転軸ヒートパイ
プを形成する横軸水車発電機において、前記スラ
スト軸受のスラストカラーに中空部を設け、前記
中空部を前記回転軸ヒートパイプの発熱部の蒸気
空間に連通させたことを特徴とする横軸水車発電
機の軸受冷却装置。1 Rotation in which a rotating shaft directly connected to the runner is horizontally supported by a journal bearing and a thrust bearing outside the casing, the journal bearing and thrust bearing are inside the rotating shaft as a heat generating part, and the runner exposed to the waterway is a condensing part. A horizontal shaft water turbine generator forming a shaft heat pipe, characterized in that a hollow portion is provided in the thrust collar of the thrust bearing, and the hollow portion is communicated with a steam space of a heat generating portion of the rotary shaft heat pipe. Bearing cooling system for shaft turbine generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61096276A JPS62251474A (en) | 1986-04-25 | 1986-04-25 | Bearing cooling device for horizontal shaft turbine generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61096276A JPS62251474A (en) | 1986-04-25 | 1986-04-25 | Bearing cooling device for horizontal shaft turbine generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62251474A JPS62251474A (en) | 1987-11-02 |
| JPH045826B2 true JPH045826B2 (en) | 1992-02-03 |
Family
ID=14160609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61096276A Granted JPS62251474A (en) | 1986-04-25 | 1986-04-25 | Bearing cooling device for horizontal shaft turbine generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62251474A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62255579A (en) * | 1986-04-30 | 1987-11-07 | Fuji Electric Co Ltd | Bearing cooling device for horizontal shaft hydraulic turbine generator |
| US5046920A (en) * | 1989-02-23 | 1991-09-10 | Fuji Electric Co., Ltd. | Bearing cooling system in horizontal shaft water turbine generator |
| JPH02238178A (en) * | 1989-03-09 | 1990-09-20 | Fuji Electric Co Ltd | Bearing cooling device for horizontal hydraulic turbine generator |
| JP2745698B2 (en) * | 1989-07-06 | 1998-04-28 | 富士電機株式会社 | Bearing cooling system for horizontal axis turbine generator |
| JP5956885B2 (en) * | 2012-09-19 | 2016-07-27 | 株式会社東芝 | Hydraulic machine and operation method thereof |
| CN105986951B (en) * | 2015-02-09 | 2020-04-03 | 杭州林东新能源科技股份有限公司 | Sliding bearing and tidal current power generation device with same |
-
1986
- 1986-04-25 JP JP61096276A patent/JPS62251474A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62251474A (en) | 1987-11-02 |
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