JPS6357875A - Preventing device for leakage of oil mist in main bearing of water turbine - Google Patents
Preventing device for leakage of oil mist in main bearing of water turbineInfo
- Publication number
- JPS6357875A JPS6357875A JP61202580A JP20258086A JPS6357875A JP S6357875 A JPS6357875 A JP S6357875A JP 61202580 A JP61202580 A JP 61202580A JP 20258086 A JP20258086 A JP 20258086A JP S6357875 A JPS6357875 A JP S6357875A
- Authority
- JP
- Japan
- Prior art keywords
- main bearing
- main shaft
- main
- bearing cover
- oil mist
- 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.)
- Pending
Links
- 239000003595 mist Substances 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 230000002265 prevention Effects 0.000 claims description 7
- 239000003921 oil Substances 0.000 abstract description 39
- 239000010687 lubricating oil Substances 0.000 abstract description 4
- 239000001996 bearing alloy Substances 0.000 abstract description 3
- 230000002441 reversible effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000012856 packing Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000003466 welding 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
- Hydraulic Turbines (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は水車またはポンプ水車の、主軸と主軸受カバー
の間から漏洩するオイルミストの漏洩防止装置に関する
。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a leak prevention device for oil mist leaking from between the main shaft and main bearing cover of a water turbine or a pump water turbine.
立て軸の水車またはポンプ水車が回転した場合、主軸受
部にオイルミスト（油霧又は油煙とも呼ばれる）が発生
する。When a vertical shaft water wheel or a pump water wheel rotates, oil mist (also called oil mist or oil smoke) is generated at the main bearing.
最近の水車やポンプ水車の技術動向としては、回転数を
上昇させて水車本体を小形化し、発電機の極数を減らし
て、水車発電プラントまたは揚水プラントのコスト低減
を指向している。このため主軸と主軸受との摺動速度が
増加し、摺動部の上端から噴出するオイルミストの量が
多くなる。Recent technological trends in water turbines and pump turbines include increasing the number of revolutions, downsizing the turbine itself, and reducing the number of generator poles to reduce the cost of a water turbine power generation plant or pumping water plant. Therefore, the sliding speed between the main shaft and the main bearing increases, and the amount of oil mist ejected from the upper end of the sliding portion increases.
このオイルミストは、主軸と主軸受カバーの間から大気
中に漏洩する。オイルミストが大気中へ流出すると、発
電所の中がくもる、点検保守が困難となる、大気汚染の
原因になる、油滴となって機器が油でべつとりし汚れる
、等の不具合がある。またオイルミストがひどい場合は
油量が減少し、補給の必要がある。This oil mist leaks into the atmosphere from between the main shaft and the main bearing cover. When oil mist leaks into the atmosphere, it causes problems such as clouding the inside of a power plant, making inspection and maintenance difficult, causing air pollution, and turning into oil droplets that make equipment sticky and dirty. Also, if the oil mist is severe, the oil amount will decrease and it will be necessary to replenish it.
このオイルミスト漏洩を防止するために、従来から下記
のような種々の対策が講じられているが、いずれも一長
一短があり、完全に防止するには至っていない。In order to prevent this oil mist leakage, various measures as described below have been taken in the past, but all of them have advantages and disadvantages and have not been completely prevented.
第５図において、主軸（１）の摺動環部Ａは、主軸受（
２）にライニングされた軸受合金（３）の内面に接して
回転摺動する。内側油槽（４）、油槽底板（５）および
外側油槽（６）で囲まれた環状の室Ｂには、潤滑油が蓄
えられ、上記摺動部を潤滑する。なお、室Ｂには図示さ
れていない潤滑油冷却装置が設けられている。室Ｂの上
方には、主軸受支え（７）、上部油槽（８）および主軸
受カバー（９）で囲まれた環状の室Ｃが設けられている
。In Fig. 5, the sliding ring portion A of the main shaft (1) is connected to the main bearing (
2) rotates and slides in contact with the inner surface of the bearing alloy (3) lined with the bearing alloy (3). Lubricating oil is stored in an annular chamber B surrounded by the inner oil tank (4), the oil tank bottom plate (5), and the outer oil tank (6), and lubricates the sliding parts. Note that the chamber B is provided with a lubricating oil cooling device (not shown). An annular chamber C surrounded by a main bearing support (7), an upper oil tank (8), and a main bearing cover (9) is provided above the chamber B.
主軸（１）が回転すると摺動部の上端から矢印方向にオ
イルミストが噴出し、その大部分は主軸受支え（７）に
設けられた給排油用の穴りから室Ｂに回収されるが、そ
の一部が鎖線円（ト）で囲まれたオイルミスト漏洩防止
装置を経て、大気中へ流出する。When the main shaft (1) rotates, oil mist is ejected from the upper end of the sliding part in the direction of the arrow, and most of it is collected into chamber B through the oil supply and drainage hole provided in the main bearing support (7). However, part of it flows into the atmosphere through the oil mist leakage prevention device surrounded by the chain line circle (g).
以下その防止装置として代表的な従来技術の３例を示す
。Three typical examples of conventional techniques as prevention devices will be shown below.
（１） ラビリンス方式
第６図に示されるように、主軸受カバー（９）に油切り
カバーαＱがボルトＯＤによって取付けられ、同油切り
カバーαＱには２列のラビリンス片ｑり。(1) Labyrinth system As shown in Figure 6, an oil drain cover αQ is attached to the main bearing cover (9) with bolts OD, and the oil drain cover αQ has two rows of labyrinth pieces q.
（１２りがボルトαＪによって取付けられている。構造
上本装置は対称に２分割されている。(No.12 is attached by bolt αJ.Structurally, this device is symmetrically divided into two parts.
この方法によると、オイルミストの漏洩を完全には防止
することができない。According to this method, leakage of oil mist cannot be completely prevented.
（２）パツキン方式
第７図に組立断面図を示す。主軸（１）の外周に、主軸
受カバー（９）と油切りカバーαＱによって保持された
パツキン圓を接触摺動させるもので、パツキンの材質に
はフェルト、樹脂、ゴム製品等が使われる。(2) Packing method Figure 7 shows an assembled sectional view. A packing ring held by a main bearing cover (9) and an oil drain cover αQ slides in contact with the outer periphery of the main shaft (1), and felt, resin, rubber products, etc. are used as the material of the packing.
この方法によると、接触形であるためにシールが摩耗し
、消耗品として、しげしば取替えねばならない。また耐
摩耗性の良い硬質材料を使用すると、摩擦熱によってシ
ール材の高温劣化が起るとともに、局部加熱による主軸
の曲り、曲りに伴う回転部と静止部の接触、接触に伴う
振動の発生等の事故につながる恐れがある。According to this method, since the seal is a contact type, the seal wears out and is a consumable item, which often has to be replaced. In addition, if a hard material with good wear resistance is used, the sealing material will deteriorate at high temperatures due to frictional heat, and the main shaft will bend due to local heating, contact between rotating and stationary parts due to bending, and vibrations due to contact. It may lead to an accident.
（３） ラビリンスとシール空気供給併用方式第８図
に組立断面図を示す。シール部・ウジング（１５１は前
述と同じ方法で、主軸受カバーに取付けられる。シール
ハウジングα９には、ラビリンスσ印によって仕切られ
た環状の２室Ｅ、Ｆを設け、大気側にラビリンスを介し
て隣接する室Ｅより圧縮空気を供給し、室Ｆより排気管
を通して、エアプリーザをもつ油溜め等に排出する。(3) Combined labyrinth and seal air supply system Figure 8 shows an assembled sectional view. The seal housing 151 is attached to the main bearing cover in the same way as described above.The seal housing α9 has two annular chambers E and F separated by a labyrinth σ symbol, Compressed air is supplied from the adjacent chamber E, and is discharged from the chamber F through an exhaust pipe to an oil sump or the like having an air pleather.
吸気側端部には、２重のファイバパツキン印がポル）
［９１によって取付けられている。There is a double fiber packing mark on the intake side end)
[Attached by 91.
この方法によると、シール部の寸法が長くなり、複雑で
コストの高い空気の給排気装置を必要とするとともに、
第２例の接触形シールと同じ欠点を持つ。According to this method, the dimensions of the seal part become long, and a complicated and expensive air supply/exhaust device is required.
It has the same drawbacks as the contact type seal of the second example.
従来のオイルミスト漏洩防止装置の前記問題点を下記に
集約する。The problems of the conventional oil mist leakage prevention device are summarized below.
（１）オイルミストの漏洩を完全に防止できない。(1) Oil mist leakage cannot be completely prevented.
（２） シールが消耗する。(2) The seal is worn out.
（３） 局部加熱により主軸が曲る。(3) The main shaft bends due to local heating.
（４）構造が複雑でコストが高い。(4) The structure is complicated and the cost is high.
（５） シール部寸法が長く、水草の軸方向長さも大
きくなってコスト高を招く。(5) The seal part is long and the axial length of the aquatic plants is also large, leading to high costs.
そこで本発明はこれら問題点を解決することを目的とす
る。Therefore, the present invention aims to solve these problems.
前記問題点を解決するために、本発明では主軸受カバー
の下方に近接して、主軸と一体になって回転する水平な
円板を取付けた。また、この水平な円板の上面に羽根を
設けて、ファン状とした。In order to solve the above-mentioned problems, in the present invention, a horizontal disc that rotates integrally with the main shaft is installed near the bottom of the main bearing cover. Additionally, blades were provided on the top surface of this horizontal disk to create a fan shape.
この回転円板によって、主軸受カバーと主軸の間から大
気を吸込むことにより、非接触方式にも拘らず、オイル
ミストの漏洩を完全に防止する。By using this rotating disk to suck in atmospheric air from between the main bearing cover and the main shaft, oil mist leakage is completely prevented despite the non-contact system.
〔実施例〕
本発明の第１実施例を第１図、第２図を参照して説明す
る。なお、従来のものを示す第５図と同一部品、同一部
分には同一の符号を付する。[Embodiment] A first embodiment of the present invention will be described with reference to FIGS. 1 and 2. Note that the same parts and portions as in FIG. 5, which shows the conventional one, are given the same reference numerals.
図において、主軸受カバー（９）の下方に近接して、主
軸（１）に円周状の溝Ｇを設け、その溝Ｇに２つ割れの
中空円板■、＠ワの内径側を挿着し、外径側にフランジ
Ｈな設けて、ボルトＣＩ）とナツトａによって結合して
、一体の回転円板を形成する。In the figure, a circumferential groove G is provided in the main shaft (1) close to the bottom of the main bearing cover (9), and the inner diameter sides of the two-split hollow disks ■ and @ are inserted into the groove G. A flange H is provided on the outer diameter side, and it is connected with a bolt CI) and a nut a to form an integral rotating disk.
この回転円板は主軸（１）と共に回転するから、円板と
主軸受カバーとのすきまＳを適切な値にすると、円板と
空気の摩擦による遠心力によって矢印方向に空気が流れ
、膝部からのオイルミストの漏洩を防止する。主軸受カ
バー（９）の上面に案内円筒のを取付けることによって
、この効果をさらに高めることができる。つぎに室Ｃに
排気穴Ｊを設けることによって、吸入された空気を排気
管を通して、エアプリーザをもつ油溜め等に放出し、室
Ｃの圧力上昇を防ぐと共に、排気穴Ｊから排出される空
気に混入するオイルミストをエアプリーザにより濾過す
る。なお符号□□□は給排油用穴のカバーである。Since this rotating disk rotates together with the main shaft (1), if the clearance S between the disk and the main bearing cover is set to an appropriate value, air will flow in the direction of the arrow due to the centrifugal force caused by the friction between the disk and the air. Prevent oil mist from leaking from. This effect can be further enhanced by attaching a guide cylinder to the upper surface of the main bearing cover (9). Next, by providing an exhaust hole J in the chamber C, the inhaled air is discharged through the exhaust pipe to an oil sump equipped with an air pleather, preventing a rise in pressure in the chamber C, and the air discharged from the exhaust hole J is The mixed oil mist is filtered by an air pleather. Note that the symbol □□□ is a cover for the oil supply and drainage hole.
本考案の第２実施例を第３図、第４図を参照して説明す
る。図において、主軸（１）に設けられた溝Ｇに２分割
された円板（至）、０４つの内周部を挿着し、ポル）
２１１およびナツト■で分割円板のフランジ部を結合す
ることによって、回転円板を形成して、主軸（１）と一
体化する点は、前記第１実施例と同様である。本実施例
では、円板（財）。A second embodiment of the present invention will be described with reference to FIGS. 3 and 4. In the figure, insert the two-divided disc (to) into the groove G provided in the main shaft (1), and insert the four inner peripheral parts.
This is the same as in the first embodiment in that the flange portions of the divided disks are joined with 211 and nuts (2) to form a rotating disk and integrated with the main shaft (1). In this example, it is a disk (goods).
幅ワの上面すなわち主軸受カバー（９）に対面する側に
、第４図に示すように、複数個の羽根器を取付けてファ
ンを形成する。本実施例では円板は一２餉ワがファンを
形成しているので、主軸受カバーと主軸とのすきまから
のオイルミスト漏洩防止効果が前記第１実施例よりもさ
らに大きい。このファンは周速が低いから、羽根内を彎
曲させる必要がなく、ラジアル羽根としても、出口空気
の切線方向速度成分は小さい。なお羽根器は溶接または
リベットによって、円板（財）。As shown in FIG. 4, a plurality of impellers are attached to the upper surface of the width W, that is, the side facing the main bearing cover (9) to form a fan. In this embodiment, since 12 pieces of the disc form the fan, the effect of preventing oil mist from leaking from the gap between the main bearing cover and the main shaft is even greater than in the first embodiment. Since this fan has a low circumferential speed, there is no need to curve the inside of the blades, and even with radial blades, the velocity component of the outlet air in the tangential direction is small. The impeller is made of a disk (goods) by welding or riveting.
（２）りに取付けられる。(2) Attached to the rear.
また当該ファンの駆動動力は極めて小さく、水車または
揚水プラントの効率には何等影響しない。Moreover, the driving power of the fan is extremely small and has no effect on the efficiency of the water turbine or pumping plant.
ファンの羽根の高さすなわち主軸受カバーと円板との間
隔は、潤滑油室から主軸受を経て、上部オイルミスト室
に流入するオイルミストの量に応じて適宜決定される。The height of the fan blades, that is, the distance between the main bearing cover and the disk, is appropriately determined depending on the amount of oil mist flowing from the lubricating oil chamber through the main bearing and into the upper oil mist chamber.
本発明によって、下記の効果を上げることができた。 The present invention has achieved the following effects.
（１） オイルミスト漏洩の完全な防止。(1) Complete prevention of oil mist leakage.
（２） 消耗品の不要化。(2) Eliminate the need for consumables.
（３） 非接触式による局部加熱の除去。(3) Eliminate local heating using a non-contact method.
なお構造は極めて簡単でコストも低く、シかも既設の水
車、ポンプ水車にも簡単な改造を加えることによって、
適用することができる。The structure is extremely simple and the cost is low, and by making simple modifications to existing water turbines and pump turbines,
Can be applied.
【図面の簡単な説明】
第１図は本発明の第１実施例を示す縦断面図、第２図は
第１図の鎖線■−■の矢印が示す方向に見た図、第３図
は本発明の第２実施例を示す縦断面図、第４図は第３図
の鎖線ＩＶ−ＩＶの矢印が示す方向に見た図、第５図は
従来のものの１例を示す縦断面図、第６図は第５図の鎖
線円■で囲まれた部分を示す図、第７図および第８図は
、それぞれ他の従来例を示す図である。
（１）・・・主軸；（２）・・・主軸受；（９）・・・
主軸受カバー：■、■す、（財）、（％ワ・・・円板；
器・・・羽根。[Brief Description of the Drawings] Fig. 1 is a longitudinal sectional view showing a first embodiment of the present invention, Fig. 2 is a view seen in the direction indicated by the dashed line ■-■ arrow in Fig. 1, and Fig. 3 is a longitudinal sectional view showing the first embodiment of the present invention. A longitudinal sectional view showing a second embodiment of the present invention, FIG. 4 is a view seen in the direction indicated by the arrow of chain line IV-IV in FIG. 3, and FIG. 5 is a longitudinal sectional view showing an example of the conventional one. FIG. 6 is a diagram showing a portion surrounded by a chain line circle (■) in FIG. 5, and FIGS. 7 and 8 are diagrams showing other conventional examples, respectively. (1)...Main shaft; (2)...Main bearing; (9)...
Main bearing cover: ■, ■su, (goods), (%wa...disc;
Container: Feather.
Claims (2)
方に近接して、水平な円板を主軸に固着したことを特徴
とする、水車主軸受のオイルミスト漏洩防止装置。(1) An oil mist leakage prevention device for a water turbine main bearing, characterized in that a horizontal disc is fixed to the main shaft of a vertical shaft water turbine or a pump water turbine in close proximity to the lower part of the main bearing cover.
方に近接して、上面に羽根を有する水平なファン状円板
を、主軸に固着したことを特徴とする、水車主軸受のオ
イルミスト漏洩防止装置。(2) Oil mist for the main bearing of a water turbine, characterized in that a horizontal fan-shaped disk with blades on the upper surface is fixed to the main shaft in close proximity to the lower part of the main bearing cover of a vertical shaft water turbine or pump water turbine. Leak prevention device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61202580A JPS6357875A (en) | 1986-08-28 | 1986-08-28 | Preventing device for leakage of oil mist in main bearing of water turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61202580A JPS6357875A (en) | 1986-08-28 | 1986-08-28 | Preventing device for leakage of oil mist in main bearing of water turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6357875A true JPS6357875A (en) | 1988-03-12 |
Family
ID=16459841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61202580A Pending JPS6357875A (en) | 1986-08-28 | 1986-08-28 | Preventing device for leakage of oil mist in main bearing of water turbine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6357875A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615541A (en) * | 2013-11-29 | 2014-03-05 | 张宏伟 | Device preventing oil mist of generator bearing from overflowing |
| CN104896291A (en) * | 2015-05-20 | 2015-09-09 | 中国长江电力股份有限公司 | Self-pumped water-turbine generator set bearing oil mist absorption device |
| CN109780217A (en) * | 2019-03-28 | 2019-05-21 | 重庆华能水电设备制造有限公司 | Clearance-type oil mist prevention sealing cover with air guide structure |
| CN114110169A (en) * | 2021-11-22 | 2022-03-01 | 重庆华能水电设备制造有限公司 | Oil mist overflow prevention air outlet sealing structure of generator |
-
1986
- 1986-08-28 JP JP61202580A patent/JPS6357875A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615541A (en) * | 2013-11-29 | 2014-03-05 | 张宏伟 | Device preventing oil mist of generator bearing from overflowing |
| CN104896291A (en) * | 2015-05-20 | 2015-09-09 | 中国长江电力股份有限公司 | Self-pumped water-turbine generator set bearing oil mist absorption device |
| CN109780217A (en) * | 2019-03-28 | 2019-05-21 | 重庆华能水电设备制造有限公司 | Clearance-type oil mist prevention sealing cover with air guide structure |
| CN109780217B (en) * | 2019-03-28 | 2024-01-23 | 重庆华能水电设备制造有限公司 | Gap type oil mist preventing sealing cover with air guide structure |
| CN114110169A (en) * | 2021-11-22 | 2022-03-01 | 重庆华能水电设备制造有限公司 | Oil mist overflow prevention air outlet sealing structure of generator |
| CN114110169B (en) * | 2021-11-22 | 2024-04-26 | 重庆华能水电设备制造有限公司 | Oil mist overflow prevention airtight structure of generator |
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