【発明の詳細な説明】 〔産業上の利用分野〕 この発明は負圧から中圧に至る低温から高温の各種流
体に使用される回転軸の密封装置に関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary shaft sealing device used for various fluids having a low temperature to a high temperature ranging from negative pressure to medium pressure.
従来の負圧から中圧の流体を用いる機器の回転軸の密
封装置としては、メカニカルシールや、シールリングと
Ｏリング或いはＸリングを組合せたキャップシールなど
が一般に用いられている。2. Description of the Related Art A mechanical seal, a cap seal combining a seal ring and an O-ring or an X-ring, or the like is generally used as a conventional sealing device for a rotating shaft of a device using a negative to medium pressure fluid.
第３図はメカニカルシールを用いた回転軸の密封装置
の縦断面図である。第３図において、20はメカニカルシ
ール、21はメカニカルシール20を収納するハウジング、
22は回転軸、23はメカニカルシール20の取付フランジ、
24はシートリング、25は従動リング、26は軸シール、27
はコイルばね、28はストッパ、SFは密封端面である。FIG. 3 is a longitudinal sectional view of a rotary shaft sealing device using a mechanical seal. In FIG. 3, 20 is a mechanical seal, 21 is a housing for accommodating the mechanical seal 20,
22 is a rotating shaft, 23 is a mounting flange of the mechanical seal 20,
24 is a seat ring, 25 is a driven ring, 26 is a shaft seal, 27
Is a coil spring, 28 is a stopper,SF is a sealed end face.
以上の構成において、従動リング25がコイルばね27に
よりシートリング24に押圧され密封端面SFで摺動回転し
て回転軸22のシールが行われる。In the above configuration, the seal slides rotated by being pressed by the seat ring 24 seal end faces SF rotational shaft 22 is performed by the driven ring 25 is a coil spring 27.
流体圧力が掛ると、密封端面SFへの押圧力が流体圧力
に応じて付加されシールが確実に行われる。When fluid pressure is applied, pressing force to the seal end faces SF is added to the seal is ensured in accordance with the fluid pressure.
また、第４図にシールリングとＯリングを組合せたキ
ャップシールを用いた回転軸の密封装置の縦断面図を示
す。FIG. 4 is a longitudinal sectional view of a rotary shaft sealing device using a cap seal combining a seal ring and an O-ring.
第４図において、30はキャップシール、31はキャップ
シール30を収納するハウジング、32はキャップシール30
をハウジング31に取付ける取付フランジ、33は内周面Ｓ
を回転軸22に嵌合され、両側端の外径方向に鍔状突起を
有するコの字形断面のシールリング、34はシールリング
33の外側に嵌入されシールリング33の外周とハウジング
31の内周とをシールするＯリングである。キャップシー
ル30はシールリング33の内周面Ｓが回転軸22の外周にし
まりばめとなるように嵌合され、ゴム弾性を有するＯリ
ング34がシールリング33の外周を締付ける状態で所定の
つぶししろを与えてハウジング32内に装着され、回転軸
22外周とシールリング33の内周面Ｓとの間で摺動回転し
て回転軸22のシールを行う。In FIG. 4, reference numeral 30 denotes a cap seal, 31 denotes a housing for housing the cap seal 30, and 32 denotes a cap seal 30.
Is attached to the housing 31 and 33 is the inner peripheral surface S
A seal ring having a U-shaped cross section fitted with the rotating shaft 22 and having flange-shaped protrusions
The outer periphery of the seal ring 33 and the housing that is fitted outside the
An O-ring that seals the inner periphery of 31. The cap seal 30 is fitted in such a manner that the inner peripheral surface S of the seal ring 33 is fitted to the outer periphery of the rotary shaft 22 so as to be tightly fitted, and the O-ring 34 having rubber elasticity is squeezed in a state where the outer periphery of the seal ring 33 is tightened. It is attached inside the housing 32 with a margin, and the rotating shaft
The rotary shaft 22 is sealed by sliding rotation between the outer periphery of the seal 22 and the inner peripheral surface S of the seal ring 33.
しかしながら、従来例は以上のように構成されている
ので、メカニカルシール20の場合はシートリング24と従
動リング25の材料の選択により、負圧から中圧に至る各
種流体の広い温度範囲での回転軸22のシールが可能であ
るが部品数が多く、取付スペースが大きく、取付加工が
大変であるばかりか、メカニカルシール自体のコストが
非常に高いという問題があった。However, since the conventional example is configured as described above, in the case of the mechanical seal 20, depending on the selection of the material of the seat ring 24 and the driven ring 25, rotation of various fluids from negative pressure to medium pressure in a wide temperature range. Although the shaft 22 can be sealed, the number of parts is large, the mounting space is large, the mounting process is difficult, and the cost of the mechanical seal itself is very high.
また、キャップシール30の場合は低価格で、取付スペ
ースも小さいが、シールリング33をしまりばめで回転軸
22に嵌合するため材質は耐摩耗性と耐摩擦性を有し、し
かも伸び特性のよい樹脂材料に限定され、Ｏリング34が
ゴム材料であるために使用温度と密封流体の種類が限定
されるのみならず、シール特性を維持するためにシール
リング33の肉厚が薄く設定されており、従って寿命も比
較的短く、その上、同一部位で回転軸22とシールリング
33が摺動回転するために、回転軸22を局部的に損耗する
という欠点があり、回転軸22が摩耗した場合の補修が大
変であるという難点があった。In addition, the cap seal 30 is inexpensive and has a small mounting space.
To fit into 22, the material is limited to a resin material that has abrasion resistance and friction resistance and has good elongation characteristics, and since the O-ring 34 is a rubber material, the working temperature and the type of sealing fluid are limited. Not only that, the thickness of the seal ring 33 is set to be thin in order to maintain the sealing characteristics, so that the service life is relatively short.
There is a drawback that the rotating shaft 22 is locally worn due to the sliding rotation of the shaft 33, and there is a problem that repair when the rotating shaft 22 is worn is difficult.
この発明は、以上のような従来例の問題点を解消する
ためになされたもので、メカニカルシールより取付スペ
ースが遥かに小さく、安価で、しかも寿命がキャップシ
ールに比べて格段に長く、回転軸が摩耗した場合の補修
も至って簡単であり、材料の選択によって負圧から中圧
に至る低温から高温の各種流体のシールが可能な回転軸
の密封装置を提供することを目的としている。The present invention has been made in order to solve the above-mentioned problems of the conventional example, and has a much smaller mounting space than a mechanical seal, is inexpensive, and has a much longer life than a cap seal. It is an object of the present invention to provide a rotary shaft sealing device capable of sealing various fluids from low to high temperatures ranging from a negative pressure to a medium pressure by selecting a material, according to the selection of materials.
このため、この発明に係る回転軸の密封装置は、回転
軸にテーパ部を設け、このテーパ部に倣って内周面が嵌
合摺擦され外側端に鍔状突起を有する環状の内面摺擦部
材と、この内面摺擦部材の外周に嵌入され、かつハウジ
ングの内周をシールするシール部材と、を有する密封手
段を設け、この密封手段を、前記回転軸の軸方向に沿っ
て所望の押圧力で弾性を持って押圧する押圧手段によっ
て前記テーパ部に押圧して前記ハウジングに取付けるこ
とにより、そして更に回転軸にテーパ部を設け、このテ
ーパ部に倣って内周面が嵌合摺擦され外側端に鍔状突起
を有する環状の内面摺動部材と、ハウジングの内周に形
成したテーパ部に倣って外周面が嵌合摺擦され内側端に
鍔状突起を有する環状の外面摺動部材との間にシール部
材を挟持する密封手段を設け、この密封手段の内面摺擦
部材と外面摺擦部材を前記回転軸の軸方向に沿って夫々
別個に所望の押圧力で弾性を持って押圧する押圧手段に
よって、前記回転軸とハウジングのテーパ部に押圧して
前記ハウジングに取付けることによって、前記目的を達
成しようとするものである。For this reason, in the rotary shaft sealing device according to the present invention, the rotary shaft is provided with a tapered portion, and the inner peripheral surface is fitted and rubbed along the tapered portion and the annular inner surface rubbed with the flange-shaped projection at the outer end. A sealing member fitted to the outer periphery of the inner surface rubbing member and sealing the inner periphery of the housing; and pressing the sealing unit along a desired axial direction of the rotating shaft. The taper is pressed against the tapered portion by a pressing means that presses with elasticity by pressure, and the tapered portion is attached to the housing. Further, a tapered portion is provided on the rotating shaft, and the inner peripheral surface is fitted and rubbed along the tapered portion. An annular inner surface sliding member having a flange-shaped protrusion at an outer end, and an annular outer surface sliding member having an outer surface fitted and rubbed along a tapered portion formed on an inner periphery of the housing and having a flange-shaped protrusion at an inner end. Sealing hand that clamps a sealing member between The rotating shaft and the housing are separated by pressing means for pressing the inner sliding member and the outer sliding member of the sealing means elastically with a desired pressing force separately along the axial direction of the rotating shaft. The object is achieved by pressing against the tapered portion and attaching to the housing.
以上のような構成としたこの発明に係る回転軸の密封
装置は、ハウジングに内面摺擦部材とシール部材から成
る密封手段を収納し、この密封手段を所望の押圧力で弾
性を持って押圧する押圧手段によって前記回転軸の軸方
向に沿って押圧し、回転軸に設けられたテーパ部に前記
内面摺擦部材の内周面を押圧してハウジングに取付ける
ことにより、圧力に応じてシール面圧が付加されて、十
分な回転軸のシールが行われる。回転摺動によって内面
摺擦部材が摩耗すると摩耗に応じてテーパ部と摺合せさ
れた状態で微小移動してシールが維持される。In the rotary shaft sealing device according to the present invention having the above-described configuration, the housing houses the sealing means including the inner surface rubbing member and the sealing member, and presses the sealing means elastically with a desired pressing force. By pressing along the axial direction of the rotating shaft by a pressing means, pressing the inner peripheral surface of the inner surface rubbing member against the tapered portion provided on the rotating shaft and mounting it on the housing, the sealing surface pressure according to the pressure. Is added to sufficiently seal the rotating shaft. When the inner surface rubbing member is worn by the rotational sliding, the inner surface rubbing member is slightly moved in a state of being slid with the tapered portion in accordance with the abrasion, and the seal is maintained.
また、更に、ハウジング内周にテーパ部を設け、この
テーパ部に倣って外周面が摺擦される外面摺擦部材と前
記内面摺動部材との間にシール部材を挟持させて押圧手
段で弾性的に押圧することにより、回転軸とハウジング
のそれぞれのテーパ部で併せて回転摺動が可能となり、
使用条件が拡大され、シールの寿命を長くし、しかも回
転シール面がテーパ状であるために密封装置の装着が非
常容易で確実となるばかりか摺動部材とシール部材の材
料の選択範囲が広くなる。Further, a taper portion is provided on the inner periphery of the housing, and a sealing member is sandwiched between the outer sliding member and the inner sliding member, the outer peripheral surface of which is rubbed along the tapered portion. By pressing, the rotary shaft and the respective tapered portions of the housing can rotate and slide together,
The operating conditions are expanded, the life of the seal is lengthened, and the tapered rotary seal surface makes mounting of the sealing device very easy and reliable, and the material selection range of the sliding member and the sealing member is wide. Become.
（実施例１） 以下に、この発明の第１の実施例を図面に基づいて説
明する。Embodiment 1 Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
（構成） 第１図はこの発明の第１の実施例を示す回転軸の密封
装置の縦断面図である。(Configuration) FIG. 1 is a longitudinal sectional view of a rotary shaft sealing device according to a first embodiment of the present invention.
第１図において、１は密封装置、２は回転軸、T1は回
転軸２に設けられたテーパ部、３は両側に鍔状の突起を
有し、内周面SIがテーパ部T1の外周に倣ってテーパ部T1
と摺接するコの字形断面の環状の内面摺擦部材Ａである
シールリングであり、耐摩耗性、低摩擦性、耐クリープ
特性の優れた充填材料入り四ふっ化エチレン樹脂や、ポ
リイミド樹脂などで形成されている。４はシールリング
３の外周に嵌入され、シールリング３の外周とハウジン
グ５の内周とをシールするシール部材Ｂを構成するＯリ
ングであり、このＯリング４とシールリング３とが回転
軸２をシールする密封手段Ｃを構成している。６は押圧
リング、７はコイルばね（以下ばねという。）、８は取
付フランジであり、ばね７は押圧リング６側面と取付フ
ランジ８の側面とによって保持され、押圧リング６とば
ね７及び取付フランジ８とでシールリング３の側面を弾
性を持って押圧する押圧手段Ｄを構成している。In Figure 1, 1 is a sealing device, 2 a rotating shaft, T1 is tapered part provided on the rotary shaft 2, 3 has a flange-like projections on each side, the inner circumferential surface SI tapered portion T1 Tapered part T1 following the outer circumference of
This is a seal ring that is an annular inner surface rubbing member A having a U-shaped cross section that slides in contact with, and is made of a filled material tetrafluoroethylene resin or a polyimide resin with excellent wear resistance, low frictional properties, and excellent creep resistance. Is formed. Reference numeral 4 denotes an O-ring that is fitted on the outer periphery of the seal ring 3 and constitutes a seal member B that seals the outer periphery of the seal ring 3 and the inner periphery of the housing 5. The O-ring 4 and the seal ring 3 are Constitutes a sealing means C for sealing. Reference numeral 6 denotes a pressing ring, 7 denotes a coil spring (hereinafter referred to as a spring), 8 denotes a mounting flange, and the spring 7 is held by a side surface of the pressing ring 6 and a side surface of the mounting flange 8. 8 together constitute a pressing means D for pressing the side surface of the seal ring 3 elastically.
（動作） 以上の構成に基づいて動作を説明する。(Operation) An operation will be described based on the above configuration.
Ｏリング４につぶししろを与えて外周に嵌入したシー
ルリング３を回転軸２のテーパ部T1に嵌合し、密封手段
Ｃをハウジング５に挿入して押圧リング６とばね７でシ
ールリング３の側面を押圧しながら取付フランジ８をセ
ットしてハウジング５に取付ける。The seal ring 3 fitted to the outer periphery by giving a margin to the O-ring 4 is fitted to the tapered portion T1 of the rotating shaft 2, the sealing means C is inserted into the housing 5, and the sealing ring 3 is pressed by the pressing ring 6 and the spring 7. The mounting flange 8 is set while pressing the side surface of the housing 5 and is mounted on the housing 5.
これによってシールリング３の外周とハウジング５の
内周は所定のつぶし代を与えて装入されたＯリング４に
よりシールされ、シールリング３は側面から回転軸２の
軸方向に沿ってばね７の押圧力によって回転軸２のテー
パ部T1に押圧されて、シールリング３の内周面SIに必要
なシール面圧が付与される。流体圧力が掛ると、圧力に
応じて前記内周面SIとテーパ部T1とのシール面圧が付加
され、Ｏリング４によりシールリング３の外周とハウジ
ング５内周に対するシール面圧も共に圧力に応じて付加
されて、自封性を持って回転軸２のシールを完全に行
う。As a result, the outer periphery of the seal ring 3 and the inner periphery of the housing 5 are sealed by the O-ring 4 inserted with a predetermined crushing allowance. is pressed against the tapered portion T1 of the rotary shaft 2 by the pressing force, the sealing surface pressure required on the inner peripheral surface SI of the seal ring 3 is applied. When the fluid pressure is applied, the sealing surface pressure between the inner peripheral surface SI and the tapered portion T1 is added according to the pressure, and the O-ring 4 also applies the sealing surface pressure to the outer periphery of the seal ring 3 and the inner periphery of the housing 5. Applied according to the pressure, the rotation shaft 2 is completely sealed with self-sealing.
回転摺動によってシールリング３の内周面SIが摩耗す
ると、回転摺合せによって、テーパ部T1のテーパに倣っ
て軸径の大きい方向即ちａ方向にシールリング３が微小
移動して常に密封性能が保持されるので密封装置の寿命
を格段に長くすることができる。When the inner circumferential surface SI of the seal ring 3 by rotary sliding wears, the rotation sliding fit, always greater direction i.e. seal ring 3 in a direction of the shaft diameter to follow the taper of the tapered portion T1 is moved small sealed Since the performance is maintained, the life of the sealing device can be significantly prolonged.
なお、この実施例ではシール部材ＢとしてＯリングを
用いたがＯリングに限定されるものでなく、Ｘリング、
Ｄリングなど自封性を有する断面形状のものを使用して
もよい。In this embodiment, an O-ring is used as the seal member B. However, the present invention is not limited to the O-ring.
A self-sealing cross-sectional shape such as a D-ring may be used.
また、シールリング３とＯリング４を別体としたがシ
ールリング３の外周にシール部材Ｂをモールド加工した
一体構造としてもよい。Further, although the seal ring 3 and the O-ring 4 are separate bodies, a seal member B may be molded on the outer periphery of the seal ring 3 to form an integrated structure.
さらに、シールリング３をコの字断面形状としたが、
これに限定されるものでなく、シールリング３の内径の
大きい側のみに鍔状の突起を設けたＬ字断面形状とする
ことによって、シールリング３の材質を伸びのある樹脂
材料に代えてセラミックや金属材料とし、シール部材Ｂ
も自封性を有する形状の金属材料や、軟質、多孔性の弾
性材料を組合せて用いることが可能になり、使用条件に
応じて高真空から中圧に至る低温から高温の各種流体に
適応でき、しかも、装着スペースもメカニカルシールに
比べて格段に小さく、取付が非常に容易でかつ低価格な
回転軸の密封装置を得ることができる。Furthermore, although the seal ring 3 has a U-shaped cross section,
The present invention is not limited to this. By forming the seal ring 3 into an L-shaped cross section having a flange-shaped protrusion only on the side having a large inner diameter, the material of the seal ring 3 can be replaced by a ceramic material instead of a resin material having elongation. Or metal material, and the sealing member B
It is also possible to use a combination of metal materials having a self-sealing shape, soft and porous elastic materials, and can adapt to various fluids from low to high temperatures ranging from high vacuum to medium pressure depending on the use conditions, In addition, the mounting space is much smaller than that of the mechanical seal, and it is possible to obtain a rotary shaft sealing device that is very easy to mount and inexpensive.
これに加えて、上述したように、回転シール部材をテ
ーパ状としたので、シールリング３の装着は非常に容易
かつ確実であり、シールリング３の耐久性が格段に向上
し、また回転軸２のテーパ部T1の摺動部位がシールリン
グ３の摩耗に応じて摺合せしながら微小移動し、回転軸
２の局部的な摩耗を防止するのみならず、回転軸２の摩
滅時の補修も、テーパ部T1を研削するだけで行えるの
で、長寿命で補修が極めて容易な画期的な回転軸の密封
装置を得ることができる。In addition, since the rotary seal member is tapered as described above, the mounting of the seal ring 3 is very easy and reliable, the durability of the seal ring 3 is significantly improved, and the rotary shaft 2 minute to move while sliding fit in accordance with the wear sliding portion of the seal ring 3 of the tapered portion T1 of the not only to prevent local wear of the rotating shaft 2, also repaired during wear of the rotating shaft 2 since it performed only by grinding the tapered portion T1, can be repaired with long life obtain sealing device extremely easy breakthrough rotation axis.
なお、ばね７はコイル状に限定されず、板ばねなど所
望のシール面圧を与える弾性を備えたものを用いればよ
い。The spring 7 is not limited to a coil shape, but may be a leaf spring or the like having elasticity to give a desired sealing surface pressure.
（実施例２） 第２図は第２の実施例を示す回転軸の密封装置の縦断
面図である。なお、前記実施例と同一または相対部分は
同一符号で表わす。Second Embodiment FIG. 2 is a longitudinal sectional view of a rotary shaft sealing device according to a second embodiment. Note that the same or relative parts as those in the above embodiment are denoted by the same reference numerals.
第２図において、1Aは密封装置、5Aはハウジングであ
りハウジング5Aの内周にはテーパ部T2が設けられてい
る。９は外周面SOがテーパ部T2に倣って嵌合摺擦し内側
端に鍔状突起を有するコの字形断面をした環状の外面摺
擦部材Ｅであるシールリングであり、このシールリング
９の内周とシールリング３の外周の間にＯリング４が所
定のつぶししろ与えられて挟持されており、シールリン
グ３とＯリング４及びシールリング９により密封手段C1
が構成されている。In FIG. 2, 1A is a sealing device, 5A is on the inner periphery of the housing 5A is a housing which is provided tapered portion T2. 9 is a sealing ring outer peripheral surface SO is the outer surface rubbing member E of the annular in which the U-shaped cross-section having a flange-like projection on the mating rubbed with the inner end following the tapered portion T2, the seal ring 9 the inner and O-ring 4 between the outer periphery of the seal ring 3 is being clamped given white predetermined crush, sealing means C1 by a seal ring 3 and the O-ring 4 and the seal ring 9
Is configured.
10は押圧リング、11はコイルばね（以下ばねとい
う。）、8Aは取付フランジであり、押圧リング6,10とば
ね7,11及び取付フランジ8Aによって押圧手段Ｆが構成さ
れている。Reference numeral 10 denotes a pressing ring, 11 denotes a coil spring (hereinafter, referred to as a spring), 8A denotes a mounting flange, and the pressing rings 6, 10, springs 7, 11 and the mounting flange 8A constitute pressing means F.
以上の構成の構成に基づいて動作を説明する。 The operation will be described based on the above configuration.
回転軸２のシールについては上述の実施例と同様なの
で詳細の説明は省略する。Since the seal of the rotating shaft 2 is the same as in the above-described embodiment, detailed description will be omitted.
第２図において、シールリング３はばね７の押圧力に
よって側面より回転軸の軸方向に沿って押圧され、シー
ルリング内周面SIが回転軸２のテーパ部T1に所定の面圧
で弾性的に押圧される。また、シールリング９の外周面
S0はばね10によってハウジング5Aのテープ部T2に所定の
面圧で弾性的に押圧されいずれも取付フランジ8Aによっ
てハウジング5Aに装着される。シールリング３の外周
と、シールリング９の内周との間に所定のつぶししろを
与えてＯリング４が挟持され流体がシールする。流体圧
が掛るとシールリング３の内周面SIとシールリング９の
外周面SOはテーパ部T1とT2に流体圧に応じて付加された
押圧力で押圧され、Ｏリング４のシール面圧も高まって
回転軸２とハウジング5Aの間を完全にシールする。通常
の回転や搖動回転ではシールリング３の内周面SIが回転
軸２のテーパ部T1との間で摺動回転するが、シールリン
グ３とテーパ部T1との間で摺動回転するが、シールリン
グ３とテーパ部T1との摺動摩擦抵抗が大きくなるとシー
ルリング９の外周面SOとハウジング5Aのテーパ部T2の間
でも回転摺動が始まる。In Figure 2, the seal ring 3 is pressed along the axial direction of the rotary shaft from the side by the pressing force of the spring 7, the seal ring inner peripheral surface SI at a predetermined surface pressure to the tapered portion T1 of the rotary shaft 2 It is elastically pressed. Also, the outer peripheral surface of the seal ring 9
S0 is elastically pressed with a predetermined surface pressure against the tape portion T2 of the housing 5A by the spring 10, and is mounted on the housing 5A by the mounting flange 8A. A predetermined squeezing margin is provided between the outer periphery of the seal ring 3 and the inner periphery of the seal ring 9 to sandwich the O-ring 4 and seal the fluid. When the fluid pressure is applied, the inner peripheral surface SI of the seal ring 3 and the outer peripheral surface SO of the seal ring 9 are pressed by the pressing force applied to the tapered portions T1 and T2 according to the fluid pressure. sealing surface pressure is also increased to completely seal between the rotating shaft 2 and the housing 5a and. Although a normal rotation or oscillating rotation inner circumferential surface SI of the seal ring 3 slides rotate between the tapered portion T1 of the rotary shaft 2, the sliding rotation between the seal ring 3 and the tapered portion T1 Suruga, the rotation sliding starts between the seal ring 3 and the outer peripheral surface SO and housing 5a of the tapered portion T2 of the tapered portion T1 when the sliding frictional resistance is increased between the sealing ring 9.
以上のように、回転周速度が大きく摩擦抵抗が大きい
場合や無給油状態の場合などでシールリング３が回転軸
２との間にスティックスイップを生じた場合にシールリ
ング９とハウジング5Aのテーパ部T2との間で回転摺動が
行われるので、密封装置1Aの損傷を防止し、苛酷な条件
で回転軸２のシールを有効に行うことができる。As described above, the rotational peripheral speed increased frictional resistance or if no case of lubrication state seal ring 3 in such a sealing ring 9 and the housing 5A when produced Sticks Yip between the rotating shaft 2 large since the rotation sliding is performed between the tapered portion T2, to prevent damage to the sealing device 1a, it can be effectively carried out the sealing of the rotary shaft 2 in harsh conditions.
なお、シールリング９の断面形状も上述の実施例と同
様にコの字形の断面形状に限定されるものでなく小径側
のみ鍔状突起を有するＬ字形状とすることにより、摺擦
部材A,Eおよびシール部材Ｂの材質の選択範囲が上記実
施例で説明したように広くなり、これによって前記実施
例と同様の効果を奏することができる。The cross-sectional shape of the seal ring 9 is not limited to the U-shaped cross-sectional shape as in the above-described embodiment. As described in the above embodiment, the selection range of the materials of E and the seal member B is widened, whereby the same effect as in the above embodiment can be obtained.
また、ばね11もコイル状に限定されないことは云うま
でもない。Needless to say, the spring 11 is not limited to the coil shape.
以上説明したように、この発明によれば、回転軸にテ
ーパ部を設け、このテーパ部に倣って内周面が嵌合摺擦
される内面摺擦部材とシール部材から成る密封手段を前
記回転軸の軸方向に沿って所望の押圧力で前記テーパ部
に押圧して回転軸のシールを行う構成としたので、摺擦
部材とシール部材の材料の選択範囲が広くなり、負圧か
ら中圧に至る低温から高温の各種流体を用いる機器の回
転軸のシールを、比較的小さい装着容積内に簡単に取付
けて、しかもメカニカルシールに比べて著しく低価格で
得ることができる。As described above, according to the present invention, the rotating shaft is provided with the tapered portion, and the sealing means including the inner sliding member and the sealing member whose inner peripheral surface is fitted and rubbed along the tapered portion is rotated. Since the rotary shaft is sealed by pressing the tapered portion with a desired pressing force along the axial direction of the shaft, the selection range of the material of the rubbing member and the seal member is widened, and the negative pressure to the medium pressure The seal of the rotating shaft of equipment using various fluids ranging from low temperature to high temperature can be easily installed in a relatively small mounting volume, and can be obtained at a significantly lower price than a mechanical seal.
また、内面摺擦部材の摺動摩耗に対応して、内面摺擦
部材の内周面が回転軸のテーパ部と摺合されながら常に
テーパに倣って軸径の大きい方向に微小移動するので、
密封装置の寿命を格段に増すのみならず、回転軸の特定
部分の摩耗を防ぎ、万が一回転軸の補修を要する場合が
生じてもテーパ部のみの研削により至って容易に補修す
ることができる。Also, in response to the sliding wear of the inner surface rubbing member, the inner peripheral surface of the inner surface rubbing member always slides along the tapered portion of the rotating shaft and moves slightly in the direction of the larger shaft diameter following the taper.
Not only can the life of the sealing device be remarkably increased, but also abrasion of a specific portion of the rotating shaft can be prevented, and even if repair of the rotating shaft is required, only the tapered portion can be easily repaired by grinding.
また、更に、ハウジングの内周にテーパ部を設け、こ
のテーパ部に倣って嵌合され外周面が摺擦される外面摺
擦部材と内面摺擦部材との間に密封手段を嵌入挟持し
て、この外面摺擦部材及び内面摺擦部材を側面より回転
軸の軸方向に沿ってハウジングのテーパ部と回転軸のテ
ーパ部に押圧手段によって押圧し、回転軸とハウジング
の両テーパ部で回転摺動する構成とすることにより、前
記の効果に加えて回転軸のテーパ部のみでは対応できな
い高速回転軸のシールを行うことができるのみならず、
回転軸のテーパ部と内面摺擦部材との間にスティックス
リップが生じるような場合に外面摺擦部材が回転摺動し
て事故を防止することができる。Further, a taper portion is provided on the inner periphery of the housing, and sealing means is inserted and sandwiched between the outer surface rubbing member and the inner surface rubbing member fitted along the taper portion and rubbed on the outer peripheral surface. The outer rubbing member and the inner rubbing member are pressed against the tapered portion of the housing and the tapered portion of the rotary shaft by pressing means along the axial direction of the rotary shaft from the side surface, and the rotary rubbing is performed by both the tapered portions of the rotary shaft and the housing. In addition to the above-mentioned effects, not only the taper portion of the rotating shaft but also the sealing of the high-speed rotating shaft that cannot be performed can be performed,
When stick-slip occurs between the tapered portion of the rotating shaft and the inner surface rubbing member, the outer surface rubbing member can be rotated and slid to prevent an accident.
第１図はこの発明の第１実施例を示す回転軸の密封装置
の縦断面図、第２図はこの発明の第２の実施例を示す回
転軸の密封装置の縦断面図、第３図は従来例のメカニカ
ルシールを用いた回転軸の密封装置の縦断面図、第４図
は他の従来例を示すキャップシールを用いた回転軸の密
封装置の縦断面図である。 1,1Aは密封装置、2,22は回転軸、3,9,34はシールリン
グ、4,33はＯリング、5,5Aはハウジング、6,10は押圧リ
ング、7,11,27はコイルばね、8,8A,23は取付フランジ、
Ａは内面摺擦部材、Ｂはシール部材、C,C1は密封手段、
D,Fは押圧手段、Ｅは外面摺擦部材、T1,T2はテーパ部で
ある。 なお、図中同一または相当部分は同一符号で表わす。FIG. 1 is a longitudinal sectional view of a rotary shaft sealing device showing a first embodiment of the present invention, FIG. 2 is a vertical sectional view of a rotary shaft sealing device showing a second embodiment of the present invention, FIG. FIG. 4 is a longitudinal sectional view of a conventional rotary shaft sealing device using a mechanical seal, and FIG. 4 is a vertical sectional view of another conventional rotary shaft sealing device using a cap seal. 1,1A is a sealing device, 2,22 is a rotating shaft, 3,9,34 is a seal ring, 4,33 is an O-ring, 5,5A is a housing, 6,10 is a press ring, 7,11,27 Is a coil spring, 8,8A and 23 are mounting flanges,
A inner surface rubbing member, B is the sealing member, C, C1 is sealing means,
D and F are pressing means, E is an outer surface rubbing member, and T1 and T2 are tapered portions. In the drawings, the same or corresponding parts are represented by the same reference numerals.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2093217AJP2814133B2 (en) | 1990-04-10 | 1990-04-10 | Rotary shaft sealing device |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2093217AJP2814133B2 (en) | 1990-04-10 | 1990-04-10 | Rotary shaft sealing device |
| Publication Number | Publication Date |
|---|---|
| JPH03292473A JPH03292473A (en) | 1991-12-24 |
| JP2814133B2true JP2814133B2 (en) | 1998-10-22 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2093217AExpired - LifetimeJP2814133B2 (en) | 1990-04-10 | 1990-04-10 | Rotary shaft sealing device |
| Country | Link |
|---|---|
| JP (1) | JP2814133B2 (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011197335A (en)* | 2010-03-18 | 2011-10-06 | Tamron Co Ltd | Zoom lens |
| JP2019138217A (en)* | 2018-02-09 | 2019-08-22 | いすゞ自動車株式会社 | Seal structure |
| CN108757946A (en)* | 2018-08-14 | 2018-11-06 | 于阳徐 | Vacuum kneader mixing paddle axle flexible seal device |
| Publication number | Publication date |
|---|---|
| JPH03292473A (en) | 1991-12-24 |
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