JPH0683554B2 - Bearing cooling device for horizontal turbine generator - Google Patents
Bearing cooling device for horizontal turbine generatorInfo
- Publication number
- JPH0683554B2 JPH0683554B2 JP62248274A JP24827487A JPH0683554B2 JP H0683554 B2 JPH0683554 B2 JP H0683554B2 JP 62248274 A JP62248274 A JP 62248274A JP 24827487 A JP24827487 A JP 24827487A JP H0683554 B2 JPH0683554 B2 JP H0683554B2
- Authority
- JP
- Japan
- Prior art keywords
- collar
- bearing
- thrust
- turbine generator
- hollow portion
- 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
- 238000001816 cooling Methods 0.000 title claims description 21
- 239000012530 fluid Substances 0.000 description 13
- 230000004907 flux Effects 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2380/00—Electrical apparatus
- F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
Landscapes
- Mounting Of Bearings Or Others (AREA)
- Motor Or Generator Frames (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Motor Or Generator Cooling System (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。Description: TECHNICAL FIELD The present invention relates to cooling of a thrust bearing of a horizontal shaft turbine generator.
第４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の蒸気空間８を冷却部とするヒートパイプを形成
している。スラストカラー22はスラスト軸受３で軸方向
に支持され、ジヤーナル軸受１およびスラスト軸受３は
軸受スタンド２に収容され潤滑油５を封入している。16
はスピードリング、17はガイドベーン、23は地面であ
る。FIG. 4 shows a bearing cooling device using a rotating shaft heat pipe of a horizontal shaft turbine generator according to a conventional example. The inside of the rotating shaft 4 is hollow to enclose the working fluid 20 and the bearing side serves as a heat generating part of the runner 6. A heat pipe having the steam space 8 as a cooling portion is formed. The thrust collar 22 is axially supported by the thrust bearing 3, and the journal bearing 1 and the thrust bearing 3 are housed in the bearing stand 2 and contain the lubricating oil 5. 16
Is a speed ring, 17 is a guide vane, and 23 is the ground.
従来の軸受冷却装置では、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へ流入するが、この際スラスト軸受３は スラストカラーの発熱部から回転軸ヒートパイプの蒸
気空間８までの熱伝導距離が長い。In the conventional bearing cooling device, most of the heat generated in the journal bearing 1 and the thrust bearing 3 flows into the rotary shaft heat pipe 7. At this time, the thrust bearing 3 flows from the heat generation part of the thrust collar to the steam of the rotary shaft heat pipe. The heat conduction distance to the space 8 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。The heat conduction in the thrust collar 22 and the heat flux (W / cm 2 ) at the heat pipe evaporation surface are large.
スラストカラー22は肉厚を通常一様とするため、摩擦
により発熱するスラストカラーの表面から回転中心部へ
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。Since the thickness of the thrust collar 22 is usually uniform, the heat conduction area becomes smaller and the area of the evaporation surface becomes smaller as it goes from the surface of the thrust collar that generates heat due to friction toward the center of rotation.
スラストカラー内の発熱面から作動液20までの熱伝導
距離が長い。The heat conduction distance from the heat generating surface in the thrust collar to the hydraulic fluid 20 is long.
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った。As a result, the temperature increases due to the increase in the thermal resistance from the heat generating part of the thrust collar to the surface of the heat pipe (the temperature difference increases) and the increase in the heat flux due to the increase in the heat flux at the evaporation surface of the heat pipe. However, since the temperature of the bearing exceeds the allowable value, it was difficult to apply it to the bearing cooling of a horizontal axis turbine generator with an output of about 500kW or more.
軸受部の温度を許容値以下とするには、発熱部からヒー
トパイプ凝縮部までの温度差を小さくすること、および
冷却部分での伝熱面積を大きくし液膜を薄くして熱伝達
率を高めて温度差を小さくする方法がある。To keep the bearing temperature below the allowable value, reduce the temperature difference from the heat generating part to the heat pipe condensing part, and increase the heat transfer area in the cooling part to thin the liquid film to reduce the heat transfer coefficient. There is a method of increasing the temperature difference to reduce the temperature difference.
この発明は、横軸水車発電機のスラスト軸受の伝熱面積
を増大させかつ熱伝導距離を短くして熱抵抗を小さく
し、軸受温度を許容値以下とすることを目的とする。An object of the present invention is to increase the heat transfer area of the thrust bearing of the horizontal axis turbine generator and shorten the heat conduction distance to reduce the thermal resistance, so that the bearing temperature is not more than the allowable value.
本発明は、ジヤーナル軸受およびスラスト軸受により水
平に支承されランナーと直結する回転軸の内部に回転軸
ヒートパイプを形成する横軸水車発電機の、前記スラス
ト軸受のスラストカラーに中空部を備え、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、その際前記中空部とスラストカラー摺動面との間に
前記スラストカラー内を放射状に走る複数のカラー部通
路を設け、前記それぞれのカラー部通路を前記中空部に
連通するようにしたものである。The present invention provides a hollow shaft in a thrust collar of the thrust bearing of a horizontal shaft turbine generator that forms a rotary shaft heat pipe inside a rotary shaft that is horizontally supported by a journal bearing and a thrust bearing and is directly connected to a runner. The hollow portion is communicated with the steam space of the heat generating portion of the rotary shaft heat pipe, and at this time, a plurality of collar portion passages that radially run in the thrust collar are provided between the hollow portion and the thrust collar sliding surface, The respective collar passages communicate with the hollow portion.
この発明によれば、スラストカラー22の摺動面に発生す
る熱はスラストカラー内の肉厚内を短い距離で伝熱さ
れ、さらに伝熱面積の大きいスラストカラー内のカラー
部通路に伝熱されヒートパイプの発熱部で作動液を蒸発
させる。According to the present invention, the heat generated on the sliding surface of the thrust collar 22 is transferred within the wall thickness of the thrust collar for a short distance, and is further transferred to the collar passage in the thrust collar having a large heat transfer area. The working fluid is evaporated in the heat generating portion of the heat pipe.
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
面図である。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15を貫
通し、回転軸４を軸受スタンド２に収容したジヤーナル
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てい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を封入してある。第１図に
おいて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は吸出管である。1 is a sectional view of a bearing cooling device for a horizontal axis turbine generator according to an embodiment of the present invention, FIG. 2 is a detailed view showing a thrust collar of the bearing cooling device of FIG. 1, and FIG. It is an AA direction sectional view. A description will be given below with reference to the drawings. In FIG. 1, a rotary shaft 4 directly connected to a runner 6 penetrates a casing 15, and the rotary shaft 4 is horizontally supported by a journal bearing 1 and a thrust bearing 3 housed in a bearing stand 2, and the other end of the rotary shaft is A generator (not shown) is connected.
Lubricating oil 5 is enclosed in the bearing stand 2. In FIG. 1, 15 is a casing, 16 is a speed ring, 17 is a guide vane, and 18 is a suction pipe.
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とランナー側回転軸の封水部分を凝縮部とする
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を備えこの中空部９を複数の作
動流体通路19によって回転軸ヒートパイプの蒸気空間に
連通させるとともに、この中空部９とスラストカラー摺
動面との間にスラストカラー内を放射状に走る複数のカ
ラー部通路21を設け、このカラー部通路21を前記中空部
９に連通させている。The rotary shaft 4 is hollow and the hydraulic fluid 20 is sealed in it.
Further, the thrust bearing 3 is used as a heat generating portion, and the runner 6 exposed in the water channel and the rotary shaft heat pipe 7 having the water sealing portion of the runner side rotary shaft as the condensing portion are formed, and the hollow portion 9 is formed in the thrust collar 22 of the thrust bearing 3. The hollow portion 9 is communicated with the steam space of the rotary shaft heat pipe by a plurality of working fluid passages 19, and a plurality of collar portions radially running in the thrust collar are provided between the hollow portion 9 and the thrust collar sliding surface. A passage 21 is provided and the collar passage 21 is communicated with the hollow portion 9.
第２図および第３図において、スラストカラー22の中空
部９は第３図に示すように断面がドーナツ形をしてい
て、スラストカラーの中空部９を８本の円筒状の作動流
体通路19により蒸気空間８と連通している。なお24は中
空部密閉用ふたである。スラストカラー22内には中空部
９とスラストカラー摺動面との間に放射状に走る複数の
カラー部通路21を設けている。このカラー部通路21はス
ラストカラー22のスラストを受ける側のみでもよく、あ
るいは第２図の如くスラストカラー22の両側に設けても
よい。2 and 3, the hollow portion 9 of the thrust collar 22 has a donut-shaped cross section as shown in FIG. 3, and the hollow portion 9 of the thrust collar is provided with eight cylindrical working fluid passages 19. Communicates with the steam space 8. Reference numeral 24 is a lid for sealing the hollow portion. Inside the thrust collar 22, a plurality of radially extending collar passages 21 are provided between the hollow portion 9 and the thrust collar sliding surface. The collar passage 21 may be provided only on the thrust collar 22 side for receiving the thrust, or may be provided on both sides of the thrust collar 22 as shown in FIG.
さらに前記カラー部通路21は第２図の如くカラー部通路
21の内径側端部および外径側端部をスラストカラーの中
空部９に連通させるか、あるいは図示されていないがカ
ラー部通路21の内径側端部のみをスラストカラーの中空
部９に連通させればよい。Further, the collar passage 21 is a collar passage as shown in FIG.
The inner diameter side end and the outer diameter side end of 21 are communicated with the hollow portion 9 of the thrust collar, or, although not shown, only the inner diameter side end of the collar passage 21 is communicated with the hollow portion 9 of the thrust collar. Just do it.
この様に構成したスラスト軸受３とスラストカラー22と
がスラスト力を受けると摺動時の摩擦抵抗により摺動面
で発生した熱は、まずスラストカラー22内を熱伝導によ
り短い距離のカラー部通路21内の作動液が加熱され蒸発
する。この蒸気はカラー部通路の内径側端部から中空部
９を通りさらに作動流体通路19を通って圧力の低い冷却
部の蒸気空間へ流れさらに圧力の低いランナー側へ移動
する。ランナー側へ移動した蒸気は、冷却部の壁面（液
膜）に接して凝縮して液となる。またカラー部通路21で
熱流束が大きい時は中空部９内の作動液を加熱し一部の
作動液を蒸発させる。中空部９内の蒸気はカラー部通路
21の蒸気と混って上記の如く作動流体通路19を通って冷
却部の蒸気空間へ流れる。When the thrust bearing 3 and the thrust collar 22 configured as described above receive a thrust force, the heat generated on the sliding surface due to the frictional resistance during sliding firstly travels in the thrust collar 22 by heat conduction to pass through the collar portion passage of a short distance. The working fluid in 21 is heated and evaporated. This vapor flows from the inner diameter side end of the collar portion passage through the hollow portion 9 and the working fluid passage 19 to the vapor space of the cooling portion having a low pressure and moves to the runner side having a lower pressure. The steam that has moved to the runner side contacts the wall surface (liquid film) of the cooling unit and condenses to become liquid. When the heat flux in the collar passage 21 is large, the working fluid in the hollow portion 9 is heated to evaporate part of the working fluid. The steam in the hollow part 9 passes through the collar part.
It mixes with the steam of 21 and flows into the steam space of the cooling section through the working fluid passage 19 as described above.
作動液は、常時スラストカラーの中空部９が満される量
を真空封入し、遠心力によりスラストカラー側に戻され
る。スラスト軸受３の固定部の熱は潤滑油５に伝えられ
さらに回転軸ヒートパイプ７の表面に伝達されランナー
側へ放熱するとともに、軸受スタンド２の外表面から大
気に放熱する。The working fluid is constantly vacuum-enclosed in an amount to fill the hollow portion 9 of the thrust collar, and is returned to the thrust collar side by centrifugal force. The heat of the fixed portion of the thrust bearing 3 is transferred to the lubricating oil 5 and further to the surface of the rotary shaft heat pipe 7 to be radiated to the runner side, and also to the atmosphere from the outer surface of the bearing stand 2.
この発明によれば、スラスト軸受のスラストカラーの中
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、その際前記中空部とスラストカラー摺動面との間に
複数のカラー部通路を設け、それぞれのカラー部通路を
中空部に連通するようにしたので、発熱部であるスラス
トカラーから蒸気空間としての中空部への熱伝導距離を
従来の1/2〜1/5程度にするとともに、スラストカラーの
伝熱面積を増大させたので、発熱部である摺動面から蒸
気空間までの温度差を小さくできるため、冷却性能を高
め出力1000kW以上の横軸水車発電機などのスラスト軸受
に適用できる。According to the present invention, the hollow portion of the thrust collar of the thrust bearing is communicated with the vapor space of the heat generating portion of the rotary shaft heat pipe, and at this time, a plurality of collar passages are provided between the hollow portion and the thrust collar sliding surface. Since each of the collar passages is connected to the hollow portion, the heat conduction distance from the thrust collar, which is the heat generating portion, to the hollow portion as the vapor space is about 1/2 to 1/5 of the conventional one. Since the heat transfer area of the thrust collar has been increased, the temperature difference from the sliding surface, which is the heat generating part, to the steam space can be reduced, improving cooling performance and making it a thrust bearing for horizontal axis turbine generators with an output of 1000 kW or more. Applicable.
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図のスラストカ
ラーのA-A方向断面図、第４図は従来例による横軸水車
発電機の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、21:カラー部通路、22:スラストカラ
ー。1 is a sectional view of a bearing cooling device for a horizontal axis turbine generator according to an embodiment of the present invention, FIG. 2 is a detailed view showing a thrust collar of the bearing cooling device of FIG. 1, and FIG. FIG. 4 is a cross-sectional view of the thrust collar in the AA direction, and FIG. 4 is a cross-sectional view of a bearing cooling device for a horizontal axis turbine generator according to a conventional example. 1: Journal bearing, 3: Thrust bearing, 4: Rotating shaft, 6: Runner, 7: Rotating shaft heat pipe, 8: Steam space, 9: Hollow part,
19: Working fluid passage, 21: Collar passage, 22: Thrust collar.
Claims (3)
部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
空部を備え、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、その際前記中空部とスラス
トカラー摺動面との間に前記スラストカラー内を放射状
に走る複数のカラー部通路を設け、前記それぞれのカラ
ー部通路を前記中空部に連通するようにしたことを特徴
とする横軸水車発電機の軸受冷却装置。1. A rotary shaft directly connected to a runner is horizontally supported by a journal bearing and a thrust bearing outside the casing, the journal bearing and the thrust bearing are used as heat generating parts inside the rotary shaft, and the runner exposed in a water channel is condensed. In a horizontal shaft turbine generator that forms a rotary shaft heat pipe as a part, a hollow portion is provided in the thrust collar of the thrust bearing, and the hollow portion is communicated with the steam space of the heat generating portion of the rotary shaft heat pipe, A plurality of collar portion passages that radially run in the thrust collar are provided between the hollow portion and the thrust collar sliding surface, and each of the collar portion passages communicates with the hollow portion. Bearing cooling device for horizontal axis turbine generator.
機の軸受冷却装置において、それぞれのカラー部通路の
内径側端部をスラストカラーの中空部に連通するように
したことを特徴とする横軸水車発電機の軸受冷却装置。2. The bearing cooling device for a horizontal shaft turbine generator according to claim 1, wherein the inner diameter side end of each collar passage is communicated with the hollow portion of the thrust collar. Bearing cooling device for horizontal axis turbine generator.
機の軸受冷却装置において、それぞれのカラー部通路の
内径側端部および外径側端部をスラストカラーの中空部
に連通するようにしたことを特徴とする横軸水車発電機
の軸受冷却装置。3. A bearing cooling device for a horizontal turbine generator according to claim 1, wherein the inner diameter side end and the outer diameter side end of each collar passage are communicated with the hollow portion of the thrust collar. A bearing cooling device for a horizontal turbine generator, which is characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62248274A JPH0683554B2 (en) | 1987-10-01 | 1987-10-01 | Bearing cooling device for horizontal turbine generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62248274A JPH0683554B2 (en) | 1987-10-01 | 1987-10-01 | Bearing cooling device for horizontal turbine generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0191635A JPH0191635A (en) | 1989-04-11 |
| JPH0683554B2 true JPH0683554B2 (en) | 1994-10-19 |
Family
ID=17175685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62248274A Expired - Lifetime JPH0683554B2 (en) | 1987-10-01 | 1987-10-01 | Bearing cooling device for horizontal turbine generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0683554B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0314956U (en) * | 1989-06-22 | 1991-02-14 |
-
1987
- 1987-10-01 JP JP62248274A patent/JPH0683554B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0191635A (en) | 1989-04-11 |
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