JPH0276920A - Bearing device in water - Google Patents

Bearing device in water

Info

Publication number
JPH0276920A
JPH0276920A JP63226117A JP22611788A JPH0276920A JP H0276920 A JPH0276920 A JP H0276920A JP 63226117 A JP63226117 A JP 63226117A JP 22611788 A JP22611788 A JP 22611788A JP H0276920 A JPH0276920 A JP H0276920A
Authority
JP
Japan
Prior art keywords
bearing
rotating shaft
ceramic
water
bearing body
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
Application number
JP63226117A
Other languages
Japanese (ja)
Inventor
Kazutaka Koshiro
和高 小城
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP63226117A priority Critical patent/JPH0276920A/en
Publication of JPH0276920A publication Critical patent/JPH0276920A/en
Pending legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/20Hydro energy

Landscapes

  • Hydraulic Turbines (AREA)
  • Sliding-Contact Bearings (AREA)

Abstract

PURPOSE:To improve quality and get stable running condition by providing supporting members evenly in radial direction inside a bearing cylindrical body and providing ceramic bearing bodies divided into several members. CONSTITUTION:Multiple elastic supporting members 2 are provided evenly in radial direction inside a casing 1 and a bearing cylindrical body 3 provided is held by each elastic member 2. Also each supporting member 4 is provided evenly in radial direction inside the bearing cylindrical body 3 positioned at the center of each elastic supporting member 2, and ceramic bearing bodies 5 divided into several members are provided to bear a rotating shaft 6. Thus a ceramic material with anti-wear property and not restricted by bearing pressure can be used and each ceramic bearing body 5 can be kept in stable running condition even if the rotating shaft 6 is running eccentrically.

Description

【発明の詳細な説明】 〔発明の目的〕 (産業上の利用分野) 本発明は、例えば、水車やポンプ水車等の水力機械にお
ける水潤滑軸受等に利用される水中軸受装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an underwater bearing device used, for example, as a water-lubricated bearing in a hydraulic machine such as a water wheel or a pump water wheel.

(従来の技術) 既に提案されているこの種の水潤滑軸受等に利用される
水中軸受装置は、水や海水を潤滑液として回転軸を支承
する軸受であるけれども、水は油と比較して大幅に粘性
が低い。
(Prior art) Submersible bearing devices used in this type of water-lubricated bearings, which have already been proposed, are bearings that support a rotating shaft using water or seawater as a lubricant. Significantly lower viscosity.

従って、負荷容jl(軸受において潤滑液の圧力により
支持できる回転軸の重量)が小さく、過渡時(回転軸の
起動時や停止時又は回転軸に急激な外力が加った時等)
には、潤滑膜が破損し易くなり、これに起因して、上記
水潤滑軸受は、軸受と回転軸とが接触しても、すぐには
、異常を起さないような材料が用いられている。
Therefore, the load capacity jl (the weight of the rotating shaft that can be supported by the pressure of the lubricating fluid in the bearing) is small, and during transient situations (such as when starting or stopping the rotating shaft, or when a sudden external force is applied to the rotating shaft)
In this case, the lubricating film is easily damaged, and for this reason, the water-lubricated bearings are made of materials that do not cause abnormalities immediately even if the bearing and the rotating shaft come into contact. There is.

即ち、上記水潤滑軸受には、1.ホワイトメタル等の金
属材を用いてグリース又は潤滑油を給油する潤滑給油手
段と、2.フェノール樹脂等の合成樹脂を用いて清水を
給水する潤滑給水手段とが提案されている。
That is, the above-mentioned water lubricated bearing has 1. 2. Lubricating oil supply means for supplying grease or lubricating oil using a metal material such as white metal; A lubricating water supply means for supplying fresh water using synthetic resin such as phenol resin has been proposed.

(発明が解決しようとする課題) しかしながら、上述したグリース又は潤滑油を給油する
潤滑給油手段による水潤滑軸受は、グリース又は潤滑油
を使用する関係上、このグリースや潤滑油が河川に流出
して環境汚染を引起したり、給排油系統の回収やメンテ
ナンスに問題がある。
(Problem to be Solved by the Invention) However, since the water-lubricated bearing using the above-mentioned lubricating means for supplying grease or lubricating oil uses grease or lubricating oil, this grease or lubricating oil may leak into rivers. It causes environmental pollution and there are problems with collection and maintenance of the oil supply and drainage system.

一方、フェノール樹脂等の合成樹脂を用いて清水を給水
する潤滑給水手段による水潤滑軸受は、フェノール樹脂
等の合成樹脂を使用する関係上、樹脂材の軸受は、耐摩
耗性が低く、特に、スリラー等が混入している水を潤滑
液として使用した場合には、軸受材料として長期的な見
地から信頼性や安全性に問題がある。
On the other hand, water-lubricated bearings using lubricating water supply means that supply fresh water using synthetic resin such as phenolic resin use synthetic resin such as phenolic resin, so bearings made of resin materials have low wear resistance, and in particular, If water mixed with thriller or the like is used as a lubricant, there are problems with reliability and safety as a bearing material from a long-term perspective.

他方、船用軸受として開発された硬質ゴム軸受は、異物
に対してゴムの変形で対応することができるけれども、
これは、潤滑液としての水が常に補給されている場合に
限られ、何らかの理由で水の供給が不足すると、直ちに
焼付き焼損する恐れがあるばかりでなく、面圧(単位面
積当りの荷重)が大きく取れないために、高荷重の回転
軸を支持することが困難であり、さらに、面圧を小さく
するために、軸受の径と比較して長さを長く取る必要が
あるなどの構造上の制約もあり、自由度の高い設計をす
ることが困難である。
On the other hand, hard rubber bearings developed as bearings for ships can respond to foreign objects by deforming the rubber;
This is limited to cases where water as a lubricating fluid is constantly replenished; if water supply is insufficient for some reason, not only is there a risk of immediate seizure and burnout, but also surface pressure (load per unit area) It is difficult to support a rotating shaft with a high load due to the inability to obtain a large There are also constraints, making it difficult to design with a high degree of freedom.

又一方、超硬材料としてのセラミック材料の使用が既に
提案されているけれども、これは、これをそのまま軸受
装置に使用すると、材質的に脆いために、信頼性や安全
性に問題がある。
On the other hand, although the use of a ceramic material as a superhard material has already been proposed, if this material is used as is in a bearing device, the material is brittle and there are problems with reliability and safety.

本発明は、上述した事情に鑑みてなされたものであって
、耐摩耗性にして面圧による制約のないセラミック材を
用いると共に、脆性による損傷を防止し、耐衝撃性のあ
る軸受として品質の向上を図り、併せて、安定した回転
状態を得るようにし、信頼性や安全性のある水中軸受装
置を提供することを目的とする。
The present invention has been made in view of the above-mentioned circumstances, and uses a ceramic material that is wear-resistant and is not limited by surface pressure, prevents damage due to brittleness, and improves quality as a bearing with impact resistance. The purpose of the present invention is to provide a reliable and safe underwater bearing device, which also achieves stable rotational conditions.

〔発明の構成〕[Structure of the invention]

(課題を解決するための手段とその作用)本発明は、ケ
ーシング内に複数の弾性支持部材を軸心方向へ向けて均
等に配分して付設し、この各弾性支持部材に軸受円筒体
を保持して設け、上記各弾性支持部材の中間位置に位置
した上記軸受円筒体の内側に各支持部材を軸心方向へ向
けて均等に配分して付設し、この各支持部材に複数に分
割されたセラミック軸受体を回転軸を支承するようにし
て設け、耐摩耗性にして面圧による制約のないセラミッ
ク材を使用すると共に、回転軸が偏心して回転しても、
各セラミック軸受体を常に安定した回転状態にして運転
することができるようにしたものである。
(Means for Solving the Problems and Their Effects) The present invention includes a plurality of elastic support members that are evenly distributed and attached in the axial direction within a casing, and that each elastic support member holds a cylindrical bearing body. The support members are evenly distributed and attached in the axial direction inside the bearing cylindrical body located at an intermediate position between the elastic support members, and each of the support members is divided into a plurality of parts. A ceramic bearing body is provided to support the rotating shaft, and a ceramic material is used that is wear-resistant and is not restricted by surface pressure, and even if the rotating shaft rotates eccentrically,
This allows each ceramic bearing body to be operated in a stable rotating state at all times.

(実施例) 以下、本発明を水車やポンプ水車等の水力機械における
水潤滑軸受等に利用される水中軸受装置に適用した図示
の一実施例について説明する。
(Embodiment) Hereinafter, an illustrated embodiment in which the present invention is applied to an underwater bearing device used as a water-lubricated bearing in a hydraulic machine such as a water turbine or a pump-turbine will be described.

第1図乃至第3図において、符号1は、円筒状をなすケ
ーシング(ケース本体)であって、このケーシング1内
には、軸心方向へ伸縮する複数(図では3個)の弾性支
持部材2が軸心方向へ向けて均等に配分して付設されて
おり、この各弾性支持部材2には、比較的に薄肉をなす
軸受円筒体(軸受台座ともいう)3が保持されて設けら
れている。又、上記各弾性支持部材2.2の中間位置に
位置した上記軸受円筒体3の内側には、棒状の各支持部
材4が軸心方向へ向けて均等に配分して付設されており
、この各支持部材4の内端部には、複数に分割されたセ
ラミック軸受体5が回転軸6を支承するようにして設け
られている。
1 to 3, reference numeral 1 denotes a cylindrical casing (case body), and inside the casing 1, there are a plurality of (three in the figure) elastic support members that expand and contract in the axial direction. 2 are evenly distributed in the axial direction, and each elastic support member 2 is provided with a relatively thin bearing cylindrical body (also referred to as a bearing pedestal) 3 held therein. There is. Moreover, rod-shaped support members 4 are attached to the inner side of the bearing cylinder 3 located at an intermediate position between the elastic support members 2.2, and are evenly distributed in the axial direction. At the inner end of each support member 4, a plurality of divided ceramic bearing bodies 5 are provided to support a rotating shaft 6.

従って、通常、上記回転軸6の回転に伴って各セラミッ
ク軸受体5は、上記各支持部材4を支点にして傾き、潤
滑流体の楔効果により、圧力を生じ、上記回転軸6と上
記各セラミック軸受体5との間隙には、常に、水膜が形
成されて、上記回転軸6を円滑に支承するようになって
いる(第3図参照)。
Therefore, normally, as the rotating shaft 6 rotates, each ceramic bearing body 5 tilts with the supporting member 4 as a fulcrum, and pressure is generated due to the wedge effect of the lubricating fluid, and the rotating shaft 6 and each ceramic A water film is always formed in the gap with the bearing body 5 to smoothly support the rotating shaft 6 (see FIG. 3).

又一方、第2図に示されるように、何らかの原因により
、瞬間的に衝撃荷重を受けたとき、この衝撃的な荷重に
対して、ある程度の強度を保ながらも、上記各弾性支持
部材2の僅かな変形により、衝撃力を吸収することがで
きるため、上記セラミック軸受体5自体へ衝撃力を解消
して、このセラミック軸受体5の脆性を補うと共に、こ
のセラミック軸受体5自体は機械的な強度を有している
ので、上記回転軸6の荷重を充分に支承することができ
る。さらに、この回転軸6の曲りに対しても、上記各弾
性支持部材2自体の僅かな変形を保持するように柔軟性
も有している。
On the other hand, as shown in FIG. 2, when an instantaneous impact load is applied for some reason, each of the elastic support members 2 is Since the impact force can be absorbed by slight deformation, the impact force is canceled on the ceramic bearing body 5 itself, compensating for the brittleness of the ceramic bearing body 5, and the ceramic bearing body 5 itself has mechanical resistance. Since it has strength, it can sufficiently support the load of the rotating shaft 6. Furthermore, even when the rotating shaft 6 bends, each elastic support member 2 has flexibility so as to maintain slight deformation thereof.

他方、上記各弾性支持部材2は、上記回転軸6からの振
動や衝撃力に対し、制振作用や大きな減衰作用を付加し
て、緩衝効果を向上することができる。
On the other hand, each of the elastic support members 2 can add a damping effect or a large damping effect to vibrations and impact forces from the rotating shaft 6, thereby improving the buffering effect.

このように本発明は、上記各セラミック軸受体5自体の
耐衝撃力の低いものを、弾性を存する上記各弾性支持部
材2で補いながら、セラミック軸受体5自体の耐摩耗性
を有効に発揮することができる。
In this manner, the present invention effectively exhibits the wear resistance of the ceramic bearing bodies 5 themselves while compensating for the low impact resistance of the ceramic bearing bodies 5 themselves with the elastic support members 2 having elasticity. be able to.

次に、第4図乃至第6図に示される本発明の他の実施例
は、上記軸受円筒体3にラム7aを備えたシリンダー装
置7で構成された複数のダンパー装置8を軸心方向へ向
けて均等に配分して設置し、この各ダンパー装置8に分
割されたセラミ・ツク軸受素子5aを有するセラミック
軸受体5を回転軸1を支承するようにして設けたもので
ある。
Next, in another embodiment of the present invention shown in FIGS. 4 to 6, a plurality of damper devices 8 constituted by a cylinder device 7 equipped with a ram 7a on the bearing cylindrical body 3 are moved in the axial direction. A ceramic bearing body 5 having a ceramic bearing element 5a divided into each damper device 8 is provided so as to support the rotating shaft 1.

即ち、上記軸受円筒体3には、ラム7aを備えたシリン
ダー装置7で構成された複数のダンパー装置8が軸心方
向へ向けて均等に配分して設置されており、この各ダン
パー装置8のラム7aには、分割されたセラミック軸受
素子5aを有するセラミック軸受体5が上記回転軸1を
支承するようにして設けられている。又、上記各ダンパ
ー装置8による各シリンダー装置7には、リング状をな
す連結管9が連通して連結されており、この連結管9内
及び上記各ダンパー装置8には、液体10が充填されて
いる。さらに、上記各ダンパー装置8と8との間に位置
する上記連結管9には、第6図に示されるように、仕切
板11にオリフィス12を穿設した各絞り部(細管)1
3が付設されている。
That is, on the bearing cylinder 3, a plurality of damper devices 8 constituted by a cylinder device 7 equipped with a ram 7a are installed so as to be evenly distributed in the axial direction. A ceramic bearing body 5 having a divided ceramic bearing element 5a is provided on the ram 7a to support the rotating shaft 1. Further, a ring-shaped connecting pipe 9 is connected to each cylinder device 7 of each of the damper devices 8, and a liquid 10 is filled in the connecting pipe 9 and each of the damper devices 8. ing. Further, in the connecting pipe 9 located between the damper devices 8 and 8, as shown in FIG.
3 is attached.

従って、今、何らかの原因により、瞬間的に衝撃荷重を
受けたとき、この衝撃的な荷重に対して、ある程度の強
度を保ながらも、上記各ダンノく一装置8のダンパー作
用により、衝撃力を吸収することができるため、上記セ
ラミック軸受体5自体へ衝撃力を解消して、このセラミ
ック軸受体5の脆性を補うと共に、このセラミック軸受
体5自体は機械的な強度を有しているので、上記回転軸
6の荷重を充分に支承することができる。
Therefore, when an impact load is instantaneously applied for some reason, the impact force can be reduced by the damper action of each of the above-mentioned damper devices 8, while maintaining a certain degree of strength against this impact load. Since the ceramic bearing body 5 itself can absorb the impact force, it compensates for the brittleness of the ceramic bearing body 5, and since the ceramic bearing body 5 itself has mechanical strength, The load of the rotating shaft 6 can be sufficiently supported.

又一方、上記各ダンパー装置8のダンパー作用により、
上記連結管9内の液体10は荷重の小さい側の他のダン
パー装置8へ流れようとするけれども、上記絞り部13
の流体抵抗、つまり、粘性減衰力を受けて衝撃力をさら
に吸収することができるから、上記セラミック軸受体5
の脆性を補うことができる。
On the other hand, due to the damper action of each damper device 8,
Although the liquid 10 in the connecting pipe 9 tries to flow to the other damper device 8 on the side with a smaller load, the constricted portion 13
The ceramic bearing body 5 can further absorb the impact force by receiving the fluid resistance, that is, the viscous damping force.
can compensate for the fragility of

〔発明の効果〕〔Effect of the invention〕

以上述べたように本発明によれば、ケーシング1内に複
数の弾性支持部材2を軸心方向へ向けて均等に配分して
付設し、この各弾性支持部材2に軸受円筒体3を保持し
て設け、上記各弾性支持部材2の中間位置に位置した上
記軸受円筒体3の内側に各支持部材4を軸心方向へ向け
て均等に配分して付設し、この各支持部材4に複数に分
割されたセラミック軸受体5を回転軸6を支承するよう
にして設けであるので、耐摩耗性にして面圧による制約
のないセラミック材料を用いることができるばかりでな
く、回転軸6が偏心して回転しても、各セラミック軸受
体5を常に安定した回転状態にすることができるし、さ
らに、信顆性や安全性の向上を図ることができる等の優
れた効果を有する。
As described above, according to the present invention, a plurality of elastic support members 2 are attached to the casing 1 while being evenly distributed in the axial direction, and the bearing cylindrical body 3 is held on each of the elastic support members 2. Each support member 4 is attached to the inner side of the bearing cylindrical body 3 located at an intermediate position between each of the elastic support members 2 and is evenly distributed in the axial direction. Since the divided ceramic bearing body 5 is provided to support the rotating shaft 6, it is possible not only to use a ceramic material that is wear-resistant and free from restrictions due to surface pressure, but also to prevent the rotating shaft 6 from being eccentric. Even when rotating, each ceramic bearing body 5 can always be kept in a stable rotating state, and furthermore, it has excellent effects such as being able to improve reliability and safety.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は、本発明の水中軸受装置の横断面図、第2図は
、本発明の水中軸受装置の作用を説明するための図、第
3図は、本発明の水中軸受装置の圧力分布を示す図、第
4図乃至第6図は、本発明の他の実施例を示す各図であ
る。 1・・・ケーシング、2・・・弾性支持部材、3・・・
軸受円筒体、4・・・支持部材、5・・・セラミック軸
受体、6・・・回転軸、8・・・ダンパー装置、9・・
・連結管、13・・・絞り部。 出願人代理人  佐  藤  −雄 第1図     第2図 第3図
FIG. 1 is a cross-sectional view of the underwater bearing device of the present invention, FIG. 2 is a diagram for explaining the action of the underwater bearing device of the present invention, and FIG. 3 is the pressure distribution of the underwater bearing device of the present invention. FIGS. 4 to 6 are diagrams showing other embodiments of the present invention. 1... Casing, 2... Elastic support member, 3...
Bearing cylindrical body, 4... Supporting member, 5... Ceramic bearing body, 6... Rotating shaft, 8... Damper device, 9...
- Connecting pipe, 13... throttle part. Applicant's agent Mr. Sato Figure 1 Figure 2 Figure 3

Claims (1)

【特許請求の範囲】 1、ケーシング内に複数の弾性支持部材を軸心方向へ向
けて均等に配分して付設し、この各弾性支持部材に軸受
円筒体を保持して設け、上記各弾性支持部材の中間位置
に位置した上記軸受円筒体の内側に各支持部材を軸心方
向へ向けて均等に配分して付設し、この各支持部材に複
数に分割されたセラミック軸受体を回転軸を支承するよ
うにして設けたことを特徴とする水中軸受装置。 2、軸受円筒体に複数のダンパー装置を軸心方向へ向け
て均等に配分して設置し、この各ダンパー装置に分割さ
れた各セラミック軸受体を回転軸を支承するようにして
設けたことを特徴とする特許請求の範囲第1項記載の水
中軸受装置。
[Scope of Claims] 1. A plurality of elastic support members are provided inside the casing, evenly distributed in the axial direction, and each of the elastic support members is provided with a cylindrical bearing body, and each of the elastic support members is provided with a cylindrical bearing body. Each support member is attached to the inner side of the above-mentioned bearing cylindrical body located at an intermediate position of the member, evenly distributed toward the axial direction, and a ceramic bearing body divided into a plurality of parts is attached to each support member to support the rotating shaft. An underwater bearing device characterized in that it is provided in such a manner as to. 2. A plurality of damper devices are installed on a cylindrical bearing body, evenly distributed in the axial direction, and each ceramic bearing body divided into each damper device is provided so as to support the rotating shaft. An underwater bearing device according to claim 1, characterized in that:
JP63226117A 1988-09-09 1988-09-09 Bearing device in water Pending JPH0276920A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63226117A JPH0276920A (en) 1988-09-09 1988-09-09 Bearing device in water

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63226117A JPH0276920A (en) 1988-09-09 1988-09-09 Bearing device in water

Publications (1)

Publication Number Publication Date
JPH0276920A true JPH0276920A (en) 1990-03-16

Family

ID=16840103

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63226117A Pending JPH0276920A (en) 1988-09-09 1988-09-09 Bearing device in water

Country Status (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008014246A (en) * 2006-07-06 2008-01-24 Kawasaki Heavy Ind Ltd Hydraulic power generator
CN109642605A (en) * 2016-08-31 2019-04-16 罗伯特·博世有限公司 Tilting-pad bearing
JP2022542336A (en) * 2020-08-20 2022-10-03 青▲島▼理工大学 Overload protection lubricating oil line supply system for water lubrication and overload protection method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008014246A (en) * 2006-07-06 2008-01-24 Kawasaki Heavy Ind Ltd Hydraulic power generator
CN109642605A (en) * 2016-08-31 2019-04-16 罗伯特·博世有限公司 Tilting-pad bearing
KR20190044091A (en) * 2016-08-31 2019-04-29 로베르트 보쉬 게엠베하 Tilting Pad Bearing
JP2019525102A (en) * 2016-08-31 2019-09-05 ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツングRobert Bosch Gmbh Tilting pad bearing
US10968946B2 (en) 2016-08-31 2021-04-06 Robert Bosch Gmbh Tilting-pad bearing
JP2022542336A (en) * 2020-08-20 2022-10-03 青▲島▼理工大学 Overload protection lubricating oil line supply system for water lubrication and overload protection method

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