JPH0444941Y2 - - Google Patents

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Publication number
JPH0444941Y2
JPH0444941Y2 JP1986035272U JP3527286U JPH0444941Y2 JP H0444941 Y2 JPH0444941 Y2 JP H0444941Y2 JP 1986035272 U JP1986035272 U JP 1986035272U JP 3527286 U JP3527286 U JP 3527286U JP H0444941 Y2 JPH0444941 Y2 JP H0444941Y2
Authority
JP
Japan
Prior art keywords
sliding member
side sliding
rotating
shaft sealing
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
Application number
JP1986035272U
Other languages
Japanese (ja)
Other versions
JPS62147766U (en
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
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Priority to JP1986035272U priority Critical patent/JPH0444941Y2/ja
Publication of JPS62147766U publication Critical patent/JPS62147766U/ja
Application granted granted Critical
Publication of JPH0444941Y2 publication Critical patent/JPH0444941Y2/ja
Expired legal-status Critical Current

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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)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)

Description

【考案の詳細な説明】 （産業上の利用分野） 本考案は、ケーシング内に回転自在に支えられ
た回転軸がケーシングを貫通する部分に設けられ
る回転機械のブツシユ型軸封装置に関し、ポン
プ、水車等の水力機械等に用いて好適のものであ
る。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a bush-type shaft sealing device for a rotating machine in which a rotating shaft rotatably supported within a casing is provided at a portion where the rotating shaft passes through the casing. It is suitable for use in hydraulic machines such as water turbines.

（従来の技術） 従来より、回転機械の軸封装置としてブツシユ
シールが使用されている。第４図は、立軸ポンプ
にプツシユシール６を使用した例を示す縦断面図
であつて、ポンプ揚液が主軸３と吐出エルボ２と
の間隙から大気側へ大量に漏れ出るのを防ぐため
に、或いは空気がポンプ内へ侵入するをの防ぐ目
的でブツシユシール６が使用されている。図中、
１は揚水管、４は羽根車、５はストレーナであ
る。(Prior Art) Bush seals have conventionally been used as shaft sealing devices for rotating machines. FIG. 4 is a vertical cross-sectional view showing an example in which a push seal 6 is used in a vertical shaft pump, and is used to prevent a large amount of liquid pumped from leaking into the atmosphere from the gap between the main shaft 3 and the discharge elbow 2. A bushing seal 6 is used to prevent air from entering the pump. In the figure,
1 is a pumping pipe, 4 is an impeller, and 5 is a strainer.

第５図は、上記第４図の軸封装置の詳細図で、
同図の右半分は、固定側摺動部材２２ａの摺動部
がフラツトな場合を示し、また左半分は、固定側
摺動部材２２ｂの摺動部に溝を設けた場合を示し
ており、これら固定側摺動部材は何れもハウジン
グ２３の内側にボルトによつて取付けられてい
る。図中、２１は回転軸３に装着された回転側摺
動部材、２４はＯリング、２５は水中軸受であ
る。 FIG. 5 is a detailed view of the shaft sealing device shown in FIG. 4 above.
The right half of the figure shows the case where the sliding part of the fixed side sliding member 22a is flat, and the left half shows the case where a groove is provided in the sliding part of the fixed side sliding member 22b, All of these fixed side sliding members are attached to the inside of the housing 23 with bolts. In the figure, 21 is a rotating side sliding member attached to the rotating shaft 3, 24 is an O-ring, and 25 is an underwater bearing.

上記のブツシユシール６を構成する回転側及び
固定側の両摺動部材２１，２２ａ，２２ｂには、
ステンレスや銅系合金などの金属材料が使用され
ており、運転中、回転軸３は水中軸受２５によつ
て軸受され、上記ブツシユシール６の両摺動部材
２１と２２ａ，２２ｂとが互いに接触しないよう
にして、ハウジング２３内と外部とを軸封（シー
ル）作用していた。 Both the rotating side and fixed side sliding members 21, 22a, 22b constituting the bush seal 6 include:
A metal material such as stainless steel or a copper alloy is used, and during operation, the rotating shaft 3 is supported by an underwater bearing 25 to prevent the sliding members 21 and 22a, 22b of the bushing seal 6 from coming into contact with each other. This acts as a shaft seal between the inside and outside of the housing 23.

（考案が解決しようとする問題点） 上記した連結のブツシユシールには次のような
問題点があつた。(Problems to be Solved by the Invention) The above-mentioned coupling bush seals had the following problems.

（） ブツシユシールのリーク（漏洩）量は摺
動部隙間のほぼ３乗に比例するが、摺動部材同
士の接触を避けるため、摺動部の隙間は、軸受
隙間よりも大きく採る必要があるため、比較的
大きな隙間としなければならなかつた。このた
め、リーク量を少なく制限することは不可能で
あつた。() The amount of leakage from a bush seal is approximately proportional to the cube of the clearance between the sliding parts, but in order to avoid contact between sliding parts, the clearance between the sliding parts must be larger than the bearing clearance. , a relatively large gap had to be created. For this reason, it has been impossible to limit the amount of leakage.

（） 軸封すべき流体はシルトや砂などの硬い
スラリが含有されている場合は、これらのスラ
リにより摺動部材が摩耗し、定期的に摺動部材
を交換する必要があつた。() When the fluid to be sealed in the shaft contains hard slurry such as silt or sand, the sliding members wear out due to these slurries, making it necessary to periodically replace the sliding members.

（） 摺動部隙間を全円周上で一定に保つため
に、回転軸と軸受側摺動部材との同心度に注意
を払う必要があり、このための心出し作業に多
大な労力を費やすこともあつた。() In order to keep the sliding part gap constant over the entire circumference, it is necessary to pay attention to the concentricity of the rotating shaft and the sliding member on the bearing side, and a great deal of effort is spent on centering work for this purpose. It was also hot.

本考案は、上記した問題点を解消することを技
術的課題としている。 The technical objective of the present invention is to solve the above-mentioned problems.

（問題点を解決するための手段） 本考案は、上記した従来技術の問題点を解決す
るために、ケーシング内に回転自在に支えられた
回転軸のケーシング貫通部に設けられ、回転側摺
動部材及び固定側摺動部材を備えた回転機械のブ
ツシユ型軸封装置において、回転側摺動部材及び
固定側摺動部材の一方をセラミツクス材とし、他
方をタングステンカーバイド（WC）を含有した
超硬合金とし、固定側摺動部材を半径方向に移動
可能に軸方向に弾性支持し、上記固定側摺動部材
と回転側摺動部材の半径方向の隙間を、回転軸の
軸受隙間より狭く形成し、上記固定側摺動部材の
半径方向内側に軸封圧力をバランスさせる突起部
を設け、ケーシング内の軸封圧力の高低に影響さ
れずに半径方向に移動できるようにしたことを特
徴としている。(Means for Solving the Problems) In order to solve the problems of the prior art described above, the present invention is provided in the casing penetrating part of the rotating shaft rotatably supported in the casing, and the rotation side sliding In a bush-type shaft sealing device for a rotating machine that is equipped with a member and a fixed-side sliding member, one of the rotating-side sliding member and the fixed-side sliding member is made of ceramic material, and the other is made of carbide containing tungsten carbide (WC). The fixed side sliding member is made of an alloy and elastically supported in the axial direction so as to be movable in the radial direction, and the radial gap between the fixed side sliding member and the rotating side sliding member is formed to be narrower than the bearing gap of the rotating shaft. This is characterized in that a protrusion for balancing the shaft sealing pressure is provided on the radially inner side of the fixed side sliding member, so that it can move in the radial direction without being affected by the level of the shaft sealing pressure within the casing.

なお、実施に際しては、上記セラミツクス材は
炭化珪素又は窒化珪素のセラミツクスとし、超硬
合金はWC含有量75重量％以上とするのが望まし
い。 In practice, the ceramic material is preferably silicon carbide or silicon nitride ceramic, and the cemented carbide preferably has a WC content of 75% by weight or more.

（作用） 本考案では、ブツシユシールの回転側摺動部材
及び固定側摺動部材を構成しているセラミツクス
材とタングステンカーバイドを含有している超硬
合金との組合せ材料は、空気中や清水中のみなら
ず、珪砂、アルミナ粒子を含むスラリ液中におい
ても、焼付きや摩耗などの不具合なく安定した摺
動特性を有することは実験により確認済みである
（特開昭60−73123号公報及び同60−146916号公報
参照）ので、軸封装置を構成している両摺動部材
は、たとえ接触しても、何等の悪影響を受けな
い。従つて、両摺動部材の隙間を小さくすること
が可能となる。(Function) In the present invention, the combination of the ceramic material and the cemented carbide containing tungsten carbide, which constitute the rotating sliding member and the fixed sliding member of the bush seal, can only be carried out in the air or in fresh water. It has been confirmed through experiments that it has stable sliding characteristics without problems such as seizure or wear even in slurry liquid containing silica sand and alumina particles (Japanese Patent Application Laid-open No. 73123/1983 and No. 60 (Refer to Japanese Patent Publication No. 146916) Therefore, even if the two sliding members constituting the shaft sealing device come into contact with each other, they will not be affected by any adverse effects. Therefore, it is possible to reduce the gap between both sliding members.

また、固定側摺動部材が半径方向に移動可能に
構成されているので、回転軸の回転中心に追従し
て両摺動部材の隙間をより一層小さく、回転軸の
軸受隙間より狭く形成することが可能となる。こ
のことは、両摺動部材を上記のような摺接可能な
材料で構成することによつて初めて可能となるの
である。 In addition, since the stationary side sliding member is configured to be movable in the radial direction, it is possible to follow the rotation center of the rotating shaft to make the gap between both sliding members even smaller, narrower than the bearing gap of the rotating shaft. becomes possible. This becomes possible only when both sliding members are made of materials that can be slid into contact with each other as described above.

また、固定側摺動部材は半径方向に移動可能に
軸方向に弾性支持されているので、回転体の半径
方向の振れが両摺動部材の隙間以上になつても、
固定支持のものに比べて反力の値は非常に小さく
て済み、従つて、ドライ環境下でも使用できる。 In addition, since the stationary sliding member is elastically supported in the axial direction so as to be movable in the radial direction, even if the radial vibration of the rotating body exceeds the gap between the two sliding members,
The reaction force value is very small compared to those with fixed support, so it can be used even in dry environments.

また、固定側摺動部材の半径方向内側に軸封圧
力をバランスさせる突起部を設けているので、該
固定側摺動部材に働く軸封圧力がバランスされ、
軸方向外力が殆んど作用しなくなるので、ケーシ
ング内の軸封圧力の高低に影響をされずに半径方
向に移動できるようになる。 In addition, since the protrusion that balances the shaft sealing pressure is provided on the radially inner side of the fixed side sliding member, the shaft sealing pressure acting on the fixed side sliding member is balanced.
Since almost no external force acts in the axial direction, it becomes possible to move in the radial direction without being affected by the level of shaft sealing pressure within the casing.

（実施例） 次に、本考案の実施例を図面と共に説明する。(Example) Next, embodiments of the present invention will be described with reference to the drawings.

第１図は、立軸ポンプの軸封部に本考案による
軸封装置を用いた一実施例を示す要部縦断面図で
ある。 FIG. 1 is a longitudinal sectional view of a main part showing an embodiment in which a shaft sealing device according to the present invention is used in a shaft sealing portion of a vertical shaft pump.

図において、回転軸３には、WC含有量75重量
％以上の超硬合金からなる回転側摺動部材１１
が、軸段部３ａと軸方向支持体１０とにより固定
されている。一方、炭化珪素（SiC）又は窒化珪
素（Si3N4）のセラミツクスからなる固定側摺動
部材１２は、回り止めピン１３により、ハウジン
グ１７に取付けられたシールケース１４に大し
て、円周方向の動きを制限されているが、該固定
側摺動部材１２の外周は、シールケース１４の内
周よりも充分小さいため、半径方向には遊動可能
になつており、また軸方向は、Ｏリング１５ａ及
び１５ｂを介して、シールケース１４にそれぞれ
取付けられた両側の支持体１６，１６により支承
されている。更に、第１図における軸封装置の拡
大断面図である第２図に示すように、固定側摺動
部材１２に軸方向外力が殆んど作用しないよう
に、半径方向に突出した突起部１２ａを一体に設
けて、軸封圧力Ｐをバランスさせている。なお、
図中、９は、該軸封装置の下部に設置された水中
軸受である。 In the figure, the rotating shaft 3 includes a rotating side sliding member 11 made of cemented carbide with a WC content of 75% by weight or more.
is fixed by the shaft step portion 3a and the axial support body 10. On the other hand, the fixed side sliding member 12 made of ceramics such as silicon carbide (SiC) or silicon nitride (Si 3 N 4 ) is attached to the seal case 14 attached to the housing 17 by the locking pin 13 in the circumferential direction. Although its movement is restricted, the outer periphery of the fixed sliding member 12 is sufficiently smaller than the inner periphery of the seal case 14, so it can freely move in the radial direction, and in the axial direction, the O-ring 15a and 15b, it is supported by supports 16, 16 on both sides, which are respectively attached to the seal case 14. Furthermore, as shown in FIG. 2, which is an enlarged sectional view of the shaft sealing device in FIG. are integrally provided to balance the shaft sealing pressure P. In addition,
In the figure, 9 is an underwater bearing installed at the bottom of the shaft sealing device.

この実施例によれば、回転軸１が回転中、前記
のようなセラミツクス材と、超硬合金からなる固
定側及び回転側の両摺動部材１１と１２は、空気
中、清水中、或いは珪砂、アルミナ粒子を含むス
ラリ液中においても焼付きや摩耗などの不具合な
く極めてすぐれた摺動特性を有する。このこと
は、摺動試験装置−即ち、回転軸に回転側摺動部
材に相当するスリーブ状試験片を嵌合したものを
固定側摺動部材に相当するリング状試験片内に嵌
入して固定支持し、これらの両試験片の摺動面に
潤滑液を供給すると共に、リング状試験片に対し
て半径方向側方よりロードセルを介して荷重負荷
をかけるように構成した試験装置を用い、また従
来の潤滑液を供給する保護管を用いない立軸ポン
プを用いて、種々の摺動部材について様々な使用
環境における摺動特性を出願人において比較調査
して確認されている（特開昭60−73123号公報及
び同60−146916号公報参照）。従つて、摩耗や空
気中での焼付きによる摺動部材の交換が殆んど不
要で、メンテナンスなしで長期間の運転が可能で
ある。 According to this embodiment, while the rotating shaft 1 is rotating, both the fixed side and rotating side sliding members 11 and 12 made of the ceramic material and cemented carbide described above are exposed to air, fresh water, or silica sand. It has extremely excellent sliding properties without problems such as seizure or wear even in slurry liquid containing alumina particles. This means that a sliding test device, in which a sleeve-shaped test piece corresponding to the rotating side sliding member is fitted onto a rotating shaft, is fitted into a ring-shaped test piece corresponding to the stationary side sliding member and fixed. A test device was used that was configured to support the ring-shaped test piece, supply lubricating fluid to the sliding surfaces of both test pieces, and apply a load to the ring-shaped test piece from the radial side via a load cell. The applicant has conducted a comparative study of the sliding characteristics of various sliding members in various usage environments using a conventional vertical shaft pump that does not use a protection tube for supplying lubricating fluid. (See Publication No. 73123 and Publication No. 60-146916). Therefore, there is almost no need to replace the sliding members due to wear or seizure in the air, and long-term operation is possible without maintenance.

また、固定側摺動部材１２が半径方向に移動可
能であるため、軸封部の隙間δAは、水中軸受９の
隙間δBよりも小さく設定することができるし、回
転軸３と固定側摺動部材１２との心出し作業も不
要となる。 Furthermore, since the fixed side sliding member 12 is movable in the radial direction, the gap δ A between the shaft sealing part can be set smaller than the gap δ B between the underwater bearing 9 and the rotating shaft 3 and the fixed side Centering work with the sliding member 12 is also unnecessary.

更に、固定側摺動部材１２には半径方向内側に
突起部１２ａを設けて軸封圧力Ｐをバランスさ
せ、軸方向外力が殆んど作用しないようにしてい
るので、軸封圧力Ｐの高低に拘らず、固定側摺動
部材１２とＯリング１５ａ，１５ｂとの摩擦力は
小さく、軸封装置の摺動面圧を小さく保つことが
可能である。 Furthermore, the fixed side sliding member 12 is provided with a protrusion 12a on the inside in the radial direction to balance the shaft sealing pressure P so that almost no external force in the axial direction acts on it. Regardless, the frictional force between the stationary side sliding member 12 and the O-rings 15a, 15b is small, and it is possible to keep the sliding surface pressure of the shaft seal device small.

第３図は、本考案の他の実施例を示す要部縦断
面図であつて、図中、第２図の符号と同一のもの
は、同一ないし同類部分を示すものとする。 FIG. 3 is a longitudinal sectional view of a main part showing another embodiment of the present invention, and in the figure, the same reference numerals as in FIG. 2 indicate the same or similar parts.

この実施例では、リーク量を更に減ずるため
に、固定側摺動部材１９に角形溝２０が設けられ
ており、また該固定側摺動部材１９は金属シエル
１８に焼嵌め又は接着剤によつて固定されてい
る。そして該金属シエル１８は軸方向をＯリング
１５ａ，１５ｂにより、また円周方向に回り止め
ピン１３によつてそれぞれ支持されている点で、
先の実施例（第２図）と相違しており、その他の
点では一致している。 In this embodiment, in order to further reduce the amount of leakage, the fixed side sliding member 19 is provided with a rectangular groove 20, and the fixed side sliding member 19 is shrink-fitted to the metal shell 18 or by adhesive. Fixed. The metal shell 18 is supported in the axial direction by the O-rings 15a and 15b, and in the circumferential direction by the rotation stopper pin 13, respectively.
This embodiment is different from the previous embodiment (FIG. 2), but is the same in other respects.

この実施例によれは、上記のように角形溝２０
によりリーク量が減じられるばかりでなく、回り
止めピン１３が金属シエル１８のピン穴に係合さ
れているので、固定側摺動部材１９に回り止めピ
ン１３用の穴を設ける必要がなくなり、従つて、
脆性材料である摺動部材にこの穴による応力集中
が生じない利点がある。 According to this embodiment, as described above, the square groove 20
In addition to reducing the amount of leakage, since the locking pin 13 is engaged with the pin hole of the metal shell 18, there is no need to provide a hole for the locking pin 13 in the fixed side sliding member 19, and the Then,
This has the advantage that stress concentration due to this hole does not occur in the sliding member, which is a brittle material.

なお、上記した実施例において、固定側摺動部
材にセラミツクス材を、また回転側摺動部材に超
硬合金をそれぞれ用いた構造について説明した
が、固定側摺動部材に超硬合金を、また回転側摺
動部材にセラミツクス材を用いるようにすること
も可能である。 In addition, in the above-mentioned embodiments, a structure was explained in which the fixed side sliding member was made of ceramic material and the rotating side sliding member was made of cemented carbide. It is also possible to use a ceramic material for the rotating sliding member.

（考案の効果） 以上説明したように本考案は構成されているの
で、次のような効果を奏することができる。(Effects of the Invention) Since the present invention is constructed as described above, the following effects can be achieved.

（） 固定側及び回転側の両摺動部材にセラミ
ツクス材とタングステンカーバイドを含有した
超硬合金とを組合わせて使用したことにより、
摺動面圧が小さい場合には空気中においても焼
付きなどの不具合がなく長時間運転が可能であ
り、また封水液にSiO2などの硬いスラリが含
まれる場合にも、すぐれた耐摩耗性を示すた
め、摺動部材の交換が殆んど不要で長期間の運
転か可能となる。() By using a combination of ceramic materials and cemented carbide containing tungsten carbide for both the fixed and rotating sliding members,
If the sliding surface pressure is low, it can be operated for long periods of time without problems such as seizure even in air, and has excellent wear resistance even when the sealing liquid contains hard slurry such as SiO 2 . Because of its high performance, there is almost no need to replace sliding members and long-term operation is possible.

（） 固定側摺動部材を半径方向に移動可能と
したことにより、軸封装置の両摺動部材の隙間
を水中軸受の隙間よりも小さく設定することが
可能となり、そのため、摺動部隙間のほぼ３乗
に比例する漏洩量を少なく制限することがで
き、また回転軸と固定側摺動部材との心出し作
業の不要となり、両摺動部材に上記のような摺
動特性のすぐれた材料を使用したことと相挨つ
て、リーク量が少なく、長期間のメンテナンス
フリー（維持作業不要）の軸封装置を得ること
ができる。() By making the fixed side sliding member movable in the radial direction, it is possible to set the gap between both sliding members of the shaft sealing device to be smaller than the gap between the underwater bearings. It is possible to limit the amount of leakage, which is approximately proportional to the third power, and eliminate the need for centering work between the rotating shaft and the stationary side sliding member. Coupled with the use of , it is possible to obtain a shaft sealing device that has a small amount of leakage and is maintenance-free for a long period of time (no maintenance work required).

（） 固定側摺動部材は半径方向に移動可能に
軸方向に弾性支持されているので、回転体の半
径方向の振れが両摺動部材の隙間以上になつて
も、固定支持のものに比べて反力の値は非常に
小さくて済み、従つて、ドライ環境下でも使用
できる。() The fixed side sliding member is elastically supported in the axial direction so that it can move in the radial direction, so even if the radial vibration of the rotating body exceeds the gap between the two sliding members, it will be more stable than a fixed-side sliding member. Therefore, the value of the reaction force is very small, so it can be used even in dry environments.

（） 固定側摺動部材の半径方向内側に軸封圧
力をバランスさせる突起部を設けたことによ
り、該固定側摺動部材に働く軸封圧力がバラン
スされ、軸方向外力が殆んど作用しなくなるの
で、ケーシング内の軸封圧力の高低に影響をさ
れずに半径方向に移動できるようになる。() By providing a protrusion that balances the shaft sealing pressure on the radially inner side of the fixed side sliding member, the shaft sealing pressure acting on the fixed side sliding member is balanced, and almost no external force in the axial direction acts. Therefore, it becomes possible to move in the radial direction without being affected by the level of shaft sealing pressure inside the casing.

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

第１図は本考案の一実施例を示す要部縦断面
図、第２図は第１図の軸封装置の拡大断面図、第
３図は本考案の他の実施例を示す要部縦断面図、
第４図は従来の立形ポンプの縦断面図、第５図は
第４図の軸封装置の拡大断面図である。 ３……回転軸、１１……回転側摺動部材、１
２，１９……固定側摺動部材、１２ａ……突起
部、１３……回り止めピン、１４……シールケー
ス、１５ａ，１５ｂ……Ｏリング、１８……金属
シエル、１８ａ……突起部、２０……角形溝。 Fig. 1 is a longitudinal sectional view of the main part showing one embodiment of the present invention, Fig. 2 is an enlarged sectional view of the shaft sealing device of Fig. 1, and Fig. 3 is a longitudinal sectional view of the main part showing another embodiment of the invention. side view,
FIG. 4 is a longitudinal cross-sectional view of a conventional vertical pump, and FIG. 5 is an enlarged cross-sectional view of the shaft sealing device shown in FIG. 4. 3... Rotating shaft, 11... Rotating side sliding member, 1
2, 19...Fixed side sliding member, 12a...Protrusion, 13...Stopping pin, 14...Seal case, 15a, 15b...O ring, 18...Metal shell, 18a...Protrusion, 20... Square groove.

Claims (1)

【実用新案登録請求の範囲】 １ ケーシング内に回転自在に支えられた回転軸
のケーシング貫通部に設けられ、回転側摺動部
材及び固定側摺動部材を備えた回転機械のブツ
シユ型軸封装置において、回転側摺動部材及び
固定側摺動部材の一方をセラミツクス材とし、
他方をタングステンカーバイド（WC）を含有
した超硬合金とし、固定側摺動部材を半径方向
に移動可能に軸方向に弾性支持し、上記固定側
摺動部材と回転側摺動部材の半径方向の隙間
を、回転軸の軸受隙間より狭く形成し、上記固
定側摺動部材の半径方向内側に軸封圧力をバラ
ンスさせる突起部を設け、ケーシング内の軸封
圧力の高低に影響されずに半径方向に移動でき
るようにしたことを特徴とする軸封装置。 ２ 上記セラミツクス材は炭化珪素（SiC）又は
窒化珪素（Si3N4）であり、超硬合金はタング
ステンカーバイド（WC）含有量75重量％以上
である実用新案登録請求の範囲第１項記載の軸
封装置。[Claims for Utility Model Registration] 1. A bush-type shaft sealing device for a rotating machine, which is provided in a casing penetrating portion of a rotating shaft rotatably supported within a casing, and includes a rotating side sliding member and a stationary side sliding member. In the above, one of the rotating side sliding member and the stationary side sliding member is made of ceramic material,
The other side is made of a cemented carbide containing tungsten carbide (WC), and the fixed side sliding member is elastically supported in the axial direction so as to be movable in the radial direction. The clearance is narrower than the bearing clearance of the rotating shaft, and a protrusion is provided on the inside of the fixed side sliding member in the radial direction to balance the shaft sealing pressure. A shaft sealing device characterized in that it can be moved. 2. The ceramic material is silicon carbide (SiC) or silicon nitride (Si 3 N 4 ), and the cemented carbide has a tungsten carbide (WC) content of 75% by weight or more. Shaft sealing device.
JP1986035272U 1986-03-13 1986-03-13 Expired JPH0444941Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1986035272U JPH0444941Y2 (en) 1986-03-13 1986-03-13

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1986035272U JPH0444941Y2 (en) 1986-03-13 1986-03-13

Publications (2)

Publication Number Publication Date
JPS62147766U JPS62147766U (en) 1987-09-18
JPH0444941Y2 true JPH0444941Y2 (en) 1992-10-22

Family

ID=30844605

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1986035272U Expired JPH0444941Y2 (en) 1986-03-13 1986-03-13

Country Status (1)

Country Link
JP (1) JPH0444941Y2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE106999T1 (en) * 1989-12-06 1994-06-15 Pacific Wietz Gmbh & Co Kg GAS BARRIER, NON-CONTACT SEAL ASSEMBLY FOR SINGLE SHAFT.
JP4691242B2 (en) * 2000-11-08 2011-06-01 株式会社大阪真空機器製作所 Turbo molecular pump seal structure
JP5492866B2 (en) * 2011-12-20 2014-05-14 Ｋａｗａｍｏｔｏ Ｇｅｃ株式会社 Shaft seal device and pump device
DE102018205960A1 (en) * 2018-04-19 2019-10-24 Eagleburgmann Germany Gmbh & Co. Kg FLOATING RING SEAL

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0697053B2 (en) * 1983-09-30 1994-11-30 株式会社荏原製作所 Journal bearing for pump and pump using the same

Also Published As

Publication number Publication date
JPS62147766U (en) 1987-09-18

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