JPH05106744A - Mechanical seal - Google Patents

Mechanical seal

Info

Publication number
JPH05106744A
JPH05106744A JP26661991A JP26661991A JPH05106744A JP H05106744 A JPH05106744 A JP H05106744A JP 26661991 A JP26661991 A JP 26661991A JP 26661991 A JP26661991 A JP 26661991A JP H05106744 A JPH05106744 A JP H05106744A
Authority
JP
Japan
Prior art keywords
sliding surface
ring
rotary
mechanical seal
peripheral side
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
JP26661991A
Other languages
Japanese (ja)
Inventor
Kazuo Kashiwamura
和生 柏村
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP26661991A priority Critical patent/JPH05106744A/en
Publication of JPH05106744A publication Critical patent/JPH05106744A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To constantly ensure a stabilized sealing performance by keeping the contact state of a sealing face constant. CONSTITUTION:In a mechanical seal which is provided with a rotary ring 5 which is loaded on the outer peripheral surface of a rotary shaft 1 and rotated together with the rotary shaft 1, a fixed ring 10 which is airtightly fixed on the side of a casing 2 in non-contact with the rotary shaft 1 and the end face of which is slided on the rotary ring 5, and forms the sealing part of a sealing fluid P on the sliding face between the rotary ring 5 and the fixed ring 10, the sliding face width B of the sliding face is set to below 2.5mm.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、スターリングエンジン
などの高圧の軸シールにおいて、常に安定したシール性
能を発揮するメカニカルシールに関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanical seal which always exhibits stable sealing performance in a high pressure shaft seal such as a Stirling engine.

【0002】[0002]

【従来の技術】図7は例えば特開昭61−10171号
公報に開示された従来のメカニカルシールの概略構成を
示す断面図である。図において、1は図示しない駆動装
置に連結された回転軸であり、この回転軸1は、ケーシ
ング2の内部からケーシング2の孔3を非接触に貫通し
てケーシング2の外部に延出しており、ケーシング2の
内部に充填された高圧密封流体Pがケーシング2の外部
に流出するのを防止するためのメカニカルシール4が装
着されている。メカニカルシール4は次のように構成さ
れている。すなわち、回転軸1には、回転環5が装着さ
れている。回転環5は、その内周部にバネホルダー8を
装着しており、その外周部をサポート9によって軸方向
に移動自在に支持されるとともに、このサポート9によ
って周方向の位置を規制されている。上記回転環5とケ
ーシング2との間には、固定環10が装着されている。
そして固定環10は、回転環5と対向する端面に軸方向
に僅かに突出したシールノーズ11を設け、このシール
ノーズ11の先端面を上記回転環5の端面との摺動面と
している。固定環10の外周面には、周方向に延びる溝
12が形成され、この溝12の内面とケーシング2の内
面との間には、シールリング13を装着している。一
方、バネホルダー8とケーシング9との間には、コイル
バネ14が装着されており、回転環5に常時固定環10
側への押圧力を付与するようにしている。したがって、
回転環5と固定環10との密着性は、上記コイルバネ1
4の押圧力及び高圧流体Pの圧力によって確保されてい
る。
2. Description of the Related Art FIG. 7 is a sectional view showing a schematic structure of a conventional mechanical seal disclosed in, for example, Japanese Patent Laid-Open No. 61-10171. In the figure, reference numeral 1 denotes a rotary shaft connected to a drive device (not shown), and the rotary shaft 1 extends from the inside of the casing 2 through the hole 3 of the casing 2 in a non-contact manner to the outside of the casing 2. A mechanical seal 4 for preventing the high-pressure sealed fluid P filled in the casing 2 from flowing out of the casing 2 is mounted. The mechanical seal 4 is configured as follows. That is, the rotary ring 5 is attached to the rotary shaft 1. The rotary ring 5 has a spring holder 8 mounted on its inner peripheral portion, and its outer peripheral portion is supported by a support 9 so as to be movable in the axial direction, and its position in the circumferential direction is regulated by the support 9. .. A fixed ring 10 is mounted between the rotary ring 5 and the casing 2.
The fixed ring 10 is provided with a seal nose 11 that slightly protrudes in the axial direction on the end face facing the rotary ring 5, and the tip end face of the seal nose 11 is a sliding face with the end face of the rotary ring 5. A groove 12 extending in the circumferential direction is formed on the outer peripheral surface of the fixed ring 10, and a seal ring 13 is mounted between the inner surface of the groove 12 and the inner surface of the casing 2. On the other hand, a coil spring 14 is mounted between the spring holder 8 and the casing 9, and the fixed ring 10 is constantly attached to the rotary ring 5.
The pressing force is applied to the side. Therefore,
The close contact between the rotary ring 5 and the fixed ring 10 depends on the coil spring 1
It is ensured by the pressing force of 4 and the pressure of the high-pressure fluid P.

【0003】次に動作について説明する。上記回転環5
と上記固定環10との摺動面の密着性は、上記コイルバ
ネ14の押圧力及び上記高圧流体Pの圧力によって確保
され、上記回転軸1の外周面と上記回転環5の内周面に
設けた切り欠き6の隙間には上記シールリング7が装着
されており、さらに上記固定環10の外周に設けた溝1
2と上記ケーシング2の内周との隙間には、上記シール
リング13がそれぞれ装着されているために、上記ケー
シング2外部への高圧流体Pの漏れ出しが防止されてい
る。
Next, the operation will be described. The rotating ring 5
Adhesion of the sliding surface between the fixed ring 10 and the fixed ring 10 is secured by the pressing force of the coil spring 14 and the pressure of the high-pressure fluid P, and is provided on the outer peripheral surface of the rotary shaft 1 and the inner peripheral surface of the rotary ring 5. The seal ring 7 is mounted in the gap between the cutouts 6, and the groove 1 provided on the outer periphery of the fixed ring 10 is further provided.
Since the seal ring 13 is mounted in the gap between the casing 2 and the inner circumference of the casing 2, the high-pressure fluid P is prevented from leaking out of the casing 2.

【0004】[0004]

【発明が解決しようとする課題】従来のメカニカルシー
ルは以上のように構成されており、メカニカルシールの
固定環10と回転環5との摺動面は、その半径方向シー
ル長さを確保する目的と製造上の観点から摺動面幅は、
通常3〜5mm程度に設定しており、図8に示すように
面接触状態で摺動するように構成しているので、回転軸
1の回転によって回転環5の摺動面には摩擦熱が発生
し、回転環5と固定環10との摺動面の、内周側の温度
Tiが同外周側の温度Toよりも高くなるような分布が発
生する。これは、摺動面の外周側が高圧流体によって冷
却されるのに対し、内周側には高圧流体が存在しないた
めに、十分な冷却が行えないことによる。ところがこの
ような温度分布が生じると摺動面の内周側の熱膨張量が
同外周側の熱膨張量よりも大きくなり、図9に示すよう
な外周側に広がり隙間Gを生じることになる。通常この
広がり隙間Gは、数μm程度の微小なものであるが、高
圧流体がこの隙間に流入すると高圧流体は、コイルバネ
14のばね圧に対向して回転環5と固定環10との摺動
面を押し広げる向きの力Fを発生し、その結果、高圧流
体の漏れが急増することになる。このように、摺動発熱
に起因した流体の漏れが発生すると、装置の損傷、保守
性能の低下、環境汚染などをもたらす要因となるなどの
問題点があった。
The conventional mechanical seal is constructed as described above, and the sliding surface between the fixed ring 10 and the rotary ring 5 of the mechanical seal is intended to secure the radial seal length. And from the manufacturing viewpoint, the sliding surface width is
Normally, it is set to about 3 to 5 mm, and as shown in FIG. 8, it is configured to slide in a surface contact state, so that frictional heat is generated on the sliding surface of the rotary ring 5 by the rotation of the rotary shaft 1. A distribution is generated in which the temperature Ti on the inner peripheral side of the sliding surface between the rotary ring 5 and the fixed ring 10 becomes higher than the temperature To on the outer peripheral side thereof. This is because the outer peripheral side of the sliding surface is cooled by the high-pressure fluid, while the high-pressure fluid does not exist on the inner peripheral side, so that sufficient cooling cannot be performed. However, when such a temperature distribution occurs, the amount of thermal expansion on the inner peripheral side of the sliding surface becomes larger than the amount of thermal expansion on the outer peripheral side thereof, and expands to the outer peripheral side as shown in FIG. .. Normally, this widening gap G is a small amount of about several μm, but when high-pressure fluid flows into this gap, the high-pressure fluid slides between the rotary ring 5 and the fixed ring 10 in opposition to the spring pressure of the coil spring 14. A force F is generated to spread the surface, resulting in a sharp increase in leakage of the high pressure fluid. As described above, if the fluid leaks due to the sliding heat generation, there are problems such as damage to the device, deterioration of maintenance performance, and environmental pollution.

【0005】本発明は上記のような問題点を解消するた
めになされたもので、常に安定したシール性能を発揮す
ることのできるメカニカルシール装置を得ることを目的
とする。
The present invention has been made to solve the above problems, and an object of the present invention is to obtain a mechanical seal device capable of always exhibiting stable sealing performance.

【0006】[0006]

【課題を解決するための手段】本発明に係るメカニカル
シールは、回転環と固定環との摺動面幅を2.5mm以
下に設定したものである。
The mechanical seal according to the present invention is such that the sliding surface width between the rotary ring and the fixed ring is set to 2.5 mm or less.

【0007】また、本発明の別の発明に係るメカニカル
シールは、回転環と固定環との摺動面が、密封流体が作
用する周側で接触しており、他方の周側で非接触の広が
り隙間を有するようにしたものである。
Further, in a mechanical seal according to another invention of the present invention, the sliding surfaces of the rotary ring and the fixed ring are in contact with each other on the peripheral side on which the sealing fluid acts, and are non-contact on the other peripheral side. It has a widening gap.

【0008】[0008]

【作用】本発明にかかるメカニカルシールは、摺動面幅
を2.5mm以下に設定することにより、摺動面の外周
側に存在する高圧流体による摺動面全体の冷却効果を高
め、摺動面の摩擦による発熱に起因する摺動面の外周側
と内周側の温度差を小さく保つことができ、摺動面内周
側の熱膨張量を押さえることが可能となるために、摺動
面の外周側に摺動発熱に起因する広がり隙間が発生しな
くなり、常に安定したシール性能を確保することが可能
となる。
In the mechanical seal according to the present invention, by setting the sliding surface width to 2.5 mm or less, the high pressure fluid existing on the outer peripheral side of the sliding surface enhances the cooling effect of the entire sliding surface, The temperature difference between the outer and inner circumferences of the sliding surface due to heat generation due to friction of the surface can be kept small, and the amount of thermal expansion on the inner circumference side of the sliding surface can be suppressed. A widening gap due to sliding heat generation does not occur on the outer peripheral side of the surface, and stable sealing performance can always be ensured.

【0009】本発明の別の発明にかかるメカニカルシー
ルは、回転環と固定環との摺動面の接触状態を高圧流体
の存在する摺動面の外周側で接触させ、摺動面の内周側
には非接触の広がり隙間を設けた状態としているため
に、摺動面の外周側接触部での発熱は高圧流体により除
去できると共に、摺動面内周側は非接触であるために、
発熱は発生しないことから、摺動面半径方向の温度分布
を小さく押さえることが可能となるために、常に安定し
たシール性能を確保することが可能となる。
In the mechanical seal according to another invention of the present invention, the contact state of the sliding surfaces of the rotary ring and the fixed ring is brought into contact on the outer peripheral side of the sliding surface where the high-pressure fluid exists, and the inner periphery of the sliding surface is contacted. Since there is a non-contact spread gap on the side, heat generated at the outer peripheral side contact portion of the sliding surface can be removed by the high pressure fluid, and since the inner peripheral side of the sliding surface is non-contact,
Since no heat is generated, it is possible to suppress the temperature distribution in the radial direction of the sliding surface to be small, so that it is possible to always secure stable sealing performance.

【0010】[0010]

【実施例】【Example】

実施例1.以下本発明の実施例を図について説明する。
図1において、5は回転環、10は固定環、11は回転
環5の摺動面10aを形成するためのシールノーズであ
り、摺動面10aの幅Bを2.5mm以下に設定したも
のである。また、図2は、発明者が実施したメカニカル
シールの性能試験結果を示す。試験は密封圧力6MPa
で、回転数600rpmの条件で、摺動面10aの幅B
を1.0mmから3.5mmまで変化させて行った。図
から、潤滑油の漏れ量は摺動面幅の影響を受け、摺動面
幅Bが2.5mm以上において潤滑油の漏れ量は急激に
増大することがわかる。
Example 1. Embodiments of the present invention will be described below with reference to the drawings.
In FIG. 1, 5 is a rotary ring, 10 is a fixed ring, 11 is a seal nose for forming a sliding surface 10a of the rotary ring 5, and the width B of the sliding surface 10a is set to 2.5 mm or less. Is. Further, FIG. 2 shows the performance test results of the mechanical seal conducted by the inventor. The test has a sealing pressure of 6 MPa
And the width B of the sliding surface 10a under the condition that the rotation speed is 600 rpm.
Was changed from 1.0 mm to 3.5 mm. From the figure, it is understood that the amount of lubricating oil leakage is affected by the sliding surface width, and that the amount of lubricating oil leakage increases rapidly when the sliding surface width B is 2.5 mm or more.

【0011】本実施例では、固定環10の摺動面10a
の摺動面幅Bを2.5mm以下に設定したために、摺動
面全体の冷却効果を高めることができ、摺動面の外周側
の温度が高く、摺動面の内周側の温度が低くなるような
温度分布を小さく押さえることができ、その結果、摺動
面内周側の熱膨張量を押さえることが可能となり、常に
安定したシール性能を得ることができる。
In this embodiment, the sliding surface 10a of the fixed ring 10 is
Since the sliding surface width B of is set to 2.5 mm or less, the cooling effect of the entire sliding surface can be enhanced, the temperature on the outer peripheral side of the sliding surface is high, and the temperature on the inner peripheral side of the sliding surface is high. It is possible to suppress the temperature distribution that becomes low, and as a result, it is possible to suppress the amount of thermal expansion on the inner peripheral side of the sliding surface, and it is possible to always obtain stable sealing performance.

【0012】実施例2.また、上記実施例では、固定環
10の摺動面10aの摺動面幅Bを2.5mm以下に設
定した場合について説明したが、図3に示すように回転
環5にシールノーズ11を設け、その摺動面5aの摺動
面幅Bを2.5mm以下に設定しても良く、上記実施例
と同様の効果を奏する。
Example 2. Further, in the above embodiment, the case where the sliding surface width B of the sliding surface 10a of the fixed ring 10 is set to 2.5 mm or less has been described, but as shown in FIG. 3, the rotary ring 5 is provided with the seal nose 11. The sliding surface width B of the sliding surface 5a may be set to 2.5 mm or less, and the same effect as that of the above-described embodiment can be obtained.

【0013】実施例3.図4は本発明の別の発明に係る
メカニカルシールを示す断面図であり、回転環5の摺動
面5aに、密封流体が作用する外周側が高く、大気と接
触している内周側が低くなるようなテーパ状の広がり隙
間(α=2μm程度)を設けたものである。
Embodiment 3. FIG. 4 is a cross-sectional view showing a mechanical seal according to another invention of the present invention, in which the sliding surface 5a of the rotary ring 5 has a high outer peripheral side on which the sealing fluid acts and a low inner peripheral side in contact with the atmosphere. Such a tapered spread gap (α = about 2 μm) is provided.

【0014】次に動作について説明する。本実施例で
は、回転環5の摺動面5aに外周側が高く内周側が低く
なるようなテーパ状摺動面を形成し、摺動面の内周側に
広がり隙間Gを設けたために、摺動面の内周側の熱膨張
量を押さえることが可能となり、摺動面の接触状態を内
周側に広がり隙間の存在する一定の状態に保つことが可
能となり、常に安定したシール性能を得ることができ
る。
Next, the operation will be described. In this embodiment, the sliding surface 5a of the rotary ring 5 is formed with a tapered sliding surface whose outer peripheral side is high and whose inner peripheral side is low, and the sliding gap 5 is provided on the inner peripheral side of the sliding surface. It is possible to suppress the amount of thermal expansion on the inner peripheral side of the moving surface, and it is possible to maintain the contact state of the sliding surface on the inner peripheral side in a constant state with a gap, and always obtain stable sealing performance. be able to.

【0015】実施例4.また、上記実施例3では、回転
環5の摺動面5aに外周側が高く、内周側が低くなるよ
うなテーパ状の広がり隙間Gを設けた場合について説明
したが、図5に示すように固定環10の摺動面10aに
外周側が高く、内周側が低くなるようなテーパ状の摺動
面を形成することにより、摺動面の内周側に広がり隙間
Gを設けても良く、上記実施例3と同様の効果を奏す
る。
Example 4. Further, in the third embodiment described above, the sliding surface 5a of the rotary ring 5 is provided with the tapered widening gap G such that the outer peripheral side is higher and the inner peripheral side is lower, but it is fixed as shown in FIG. By forming a tapered sliding surface on the sliding surface 10a of the ring 10 such that the outer peripheral side is high and the inner peripheral side is low, a widening gap G may be provided on the inner peripheral side of the sliding surface. The same effect as in Example 3 is obtained.

【0016】実施例5.また、上記実施例4では、固定
環10の摺動面に外周側が高く、内周側が低くなるよう
なテーパ状の広がり隙間Gを設けた場合について説明し
たが、図6に示すように固定環10の摺動面10a及び
回転環5の摺動面5aの両方に外周側が高く内周側が低
くなるようなテーパ状の摺動面を形成することにより、
摺動面の内周側に広がり隙間Gを設けても良く、上記実
施例3と同様の効果を奏する。
Embodiment 5. Further, in the fourth embodiment described above, the sliding surface of the fixed ring 10 is described as being provided with the tapered widening gap G such that the outer peripheral side is higher and the inner peripheral side is lower, but as shown in FIG. By forming tapered sliding surfaces such that the outer peripheral side is high and the inner peripheral side is low on both the sliding surface 10a of 10 and the sliding surface 5a of the rotary ring 5,
A widening gap G may be provided on the inner peripheral side of the sliding surface, and the same effect as that of the third embodiment can be obtained.

【0017】[0017]

【発明の効果】以上のように、本発明によれば、摺動面
幅を2.5mm以下に設定したので、摺動面全体の冷却
効果を高めることができ、摺動面の外周側が高く、摺動
面の内周側が低くなるような摺動面の温度分布を小さく
押さえることができ、その結果、摺動面内周側の熱膨張
量を押さえることが可能となり、摺動面の接触状態を一
定の状態に保つことが可能となり、常に安定したシール
性能を得ることが可能になる。
As described above, according to the present invention, since the sliding surface width is set to 2.5 mm or less, the cooling effect of the entire sliding surface can be enhanced, and the outer peripheral side of the sliding surface is high. It is possible to suppress the temperature distribution on the sliding surface such that the inner peripheral side of the sliding surface becomes low, and as a result, it is possible to suppress the amount of thermal expansion on the inner peripheral side of the sliding surface, resulting in contact of the sliding surface. It is possible to maintain the state in a constant state and always obtain stable sealing performance.

【0018】また、本発明の別の発明によれば、回転環
と固定環との摺動面は、密封流体が作用する周側で接触
しており、他方の周側に非接触の広がり隙間を設けた構
成としたので、摺動面の、密封流体と接触しない周側の
熱膨張量を押さえることが可能となり、摺動面の接触状
態を一定に保つことが可能となるために、常に安定した
シール性能を得ることが可能となる。
Further, according to another invention of the present invention, the sliding surfaces of the rotary ring and the fixed ring are in contact with each other on the circumferential side on which the sealing fluid acts, and on the other circumferential side, there is a non-contact spread gap. Since the configuration is provided, it is possible to suppress the amount of thermal expansion on the peripheral side of the sliding surface that does not come into contact with the sealed fluid, and it is possible to keep the contact state of the sliding surface constant, so It is possible to obtain stable sealing performance.

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

【図1】本発明の実施例1を示す断面図である。FIG. 1 is a cross-sectional view showing a first embodiment of the present invention.

【図2】摺動面幅と潤滑油漏れ量との関係を実験的に求
めた特性図である。
FIG. 2 is a characteristic diagram in which a relationship between a sliding surface width and a lubricating oil leakage amount is experimentally obtained.

【図3】本発明の実施例2を示す断面図である。FIG. 3 is a cross-sectional view showing a second embodiment of the present invention.

【図4】本発明の実施例3を示す断面図である。FIG. 4 is a sectional view showing a third embodiment of the present invention.

【図5】本発明の実施例4を示す断面図である。FIG. 5 is a cross-sectional view showing a fourth embodiment of the present invention.

【図6】本発明の実施例5を示す断面図である。FIG. 6 is a cross-sectional view showing a fifth embodiment of the present invention.

【図7】従来のメカニカルシールを示す断面図である。FIG. 7 is a cross-sectional view showing a conventional mechanical seal.

【図8】従来のメカニカルシールの欠点を示す説明図で
ある。
FIG. 8 is an explanatory diagram showing a defect of a conventional mechanical seal.

【図9】従来のメカニカルシールの欠点を示す説明図で
ある。
FIG. 9 is an explanatory diagram showing a defect of a conventional mechanical seal.

【符号の説明】[Explanation of symbols]

1 回転軸 2 ケーシング 4 メカニカルシール 5 回転環 5a 摺動面 10 固定環 10a 摺動面 11 シールノーズ B 摺動面幅 G 広がり隙間 P 密封流体 1 rotating shaft 2 casing 4 mechanical seal 5 rotating ring 5a sliding surface 10 fixed ring 10a sliding surface 11 seal nose B sliding surface width G spreading gap P sealing fluid

【手続補正書】[Procedure amendment]

【提出日】平成3年12月3日[Submission date] December 3, 1991

【手続補正1】[Procedure Amendment 1]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】0002[Name of item to be corrected] 0002

【補正方法】変更[Correction method] Change

【補正内容】[Correction content]

【0002】[0002]

【従来の技術】図7は例えば特開昭61−10171号
公報に開示された従来のメカニカルシールの概略構成を
示す断面図である。図において、1は図示しない駆動装
置に連結された回転軸であり、この回転軸1は、ケーシ
ング2の内部からケーシング2の孔3を非接触に貫通し
てケーシング2の外部に延出しており、ケーシング2の
内部に充填された高圧密封流体Pがケーシング2の外部
に流出するのを防止するためのメカニカルシール4が装
着されている。メカニカルシール4は次のように構成さ
れている。すなわち、回転軸1には、回転環5が装着さ
れている。回転環5は、端面内周部に切り欠き6を有し
ている。前記切り欠き6の内面と回転軸1との間にはシ
ーリング7を装着している。また、回転環5は、その内
周部にバネホルダー8を装着しており、その外周部をサ
ポート9によって軸方向に移動自在に支持されるととも
に、このサポート9によって周方向の位置を規制されて
いる。上記回転環5とケーシング2との間には、固定環
10が装着されている。そして固定環10は、回転環5
と対向する端面に軸方向に僅かに突出したシールノーズ
11を設け、このシールノーズ11の先端面を上記回転
環5の端面との摺動面としている。固定環10の外周面
には、周方向に延びる溝12が形成され、この溝12の
内面とケーシング2の内面との間には、シールリング1
3を装着している。一方、バネホルダー8とケーシング
9との間には、コイルバネ14が装着されており、回転
環5に常時固定環10側への押圧力を付与するようにし
ている。したがって、回転環5と固定環10との密着性
は、上記コイルバネ14の押圧力及び高圧流体Pの圧力
によって確保されている。
2. Description of the Related Art FIG. 7 is a sectional view showing a schematic structure of a conventional mechanical seal disclosed in, for example, Japanese Patent Laid-Open No. 61-10171. In the figure, reference numeral 1 denotes a rotary shaft connected to a drive device (not shown), and the rotary shaft 1 extends from the inside of the casing 2 through the hole 3 of the casing 2 in a non-contact manner to the outside of the casing 2. A mechanical seal 4 for preventing the high-pressure sealed fluid P filled in the casing 2 from flowing out of the casing 2 is mounted. The mechanical seal 4 is configured as follows. That is, the rotary ring 5 is attached to the rotary shaft 1. The rotary ring 5 has a notch 6 on the inner peripheral surface of the end face.
ing. There is a seal between the inner surface of the notch 6 and the rotary shaft 1.
The ring 7 is attached. Further, the rotary ring 5 has a spring holder 8 mounted on its inner peripheral portion, and its outer peripheral portion is supported by a support 9 so as to be movable in the axial direction, and its circumferential position is restricted by the support 9. ing. A fixed ring 10 is mounted between the rotary ring 5 and the casing 2. The fixed ring 10 is the rotary ring 5
A seal nose 11 that slightly protrudes in the axial direction is provided on the end face that faces the seal nose 11, and the tip end face of the seal nose 11 is a sliding face with the end face of the rotary ring 5. A groove 12 extending in the circumferential direction is formed on the outer peripheral surface of the fixed ring 10, and the seal ring 1 is provided between the inner surface of the groove 12 and the inner surface of the casing 2.
I am wearing 3. On the other hand, a coil spring 14 is mounted between the spring holder 8 and the casing 9 so as to constantly apply a pressing force to the fixed ring 10 side to the rotary ring 5. Therefore, the close contact between the rotary ring 5 and the fixed ring 10 is ensured by the pressing force of the coil spring 14 and the pressure of the high-pressure fluid P.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 回転軸の外周に装着されて上記回転軸と
共に回転する回転環と、上記回転軸とは非接触にケーシ
ング側に気密的に固定されるとともに、端面が上記回転
環と摺動する固定環とを備え、上記回転環と上記固定環
との摺動面で密封流体のシール部を形成するメカニカル
シールにおいて、上記摺動面の摺動面幅を2.5mm以
下に設定したことを特徴とするメカニカルシール。
1. A rotary ring mounted on the outer circumference of a rotary shaft and rotating together with the rotary shaft, and the rotary shaft is hermetically fixed to the casing side in a non-contact manner, and an end face slides on the rotary ring. In a mechanical seal having a fixed ring for rotating, the sliding surface between the rotary ring and the fixed ring forms a sealing portion for a sealing fluid, the sliding surface width of the sliding surface is set to 2.5 mm or less. A mechanical seal featuring.
【請求項2】 回転軸の外周に装着されて上記回転軸と
共に回転する回転環と、上記回転軸とは非接触にケーシ
ング側に気密的に固定されるとともに、端面が上記回転
環と摺動する固定環とを備え、上記回転環と上記固定環
との摺動面で密封流体のシール部を形成するメカニカル
シールにおいて、上記摺動面は上記密封流体が作用する
周側で接触しており、他方の周側に非接触の広がり隙間
を設けたことを特徴とするメカニカルシール。
2. A rotary ring mounted on the outer circumference of a rotary shaft and rotating together with the rotary shaft, and the rotary shaft is hermetically fixed to the casing side in a non-contact manner, and the end face slides on the rotary ring. In a mechanical seal having a fixed ring that forms a sealing portion of the sealing fluid with the sliding surface between the rotary ring and the fixed ring, the sliding surface is in contact with the circumferential side on which the sealing fluid acts. , A mechanical seal characterized in that a non-contact expanding gap is provided on the other circumferential side.
JP26661991A 1991-10-16 1991-10-16 Mechanical seal Pending JPH05106744A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26661991A JPH05106744A (en) 1991-10-16 1991-10-16 Mechanical seal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26661991A JPH05106744A (en) 1991-10-16 1991-10-16 Mechanical seal

Publications (1)

Publication Number Publication Date
JPH05106744A true JPH05106744A (en) 1993-04-27

Family

ID=17433334

Family Applications (1)

Application Number Title Priority Date Filing Date
JP26661991A Pending JPH05106744A (en) 1991-10-16 1991-10-16 Mechanical seal

Country Status (1)

Country Link
JP (1) JPH05106744A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009144842A (en) * 2007-12-14 2009-07-02 Eagle Ind Co Ltd Mechanical seal
WO2014069098A1 (en) * 2012-11-02 2014-05-08 イーグル工業株式会社 Mechanical seal device
EP3048344A3 (en) * 2015-01-21 2016-08-31 United Technologies Corporation Seal housing pre-taper
JP2016166630A (en) * 2015-03-09 2016-09-15 日本ピラー工業株式会社 Dry contact seal
JP2016166624A (en) * 2015-03-09 2016-09-15 日本ピラー工業株式会社 Floating ring type mechanical seal
JP2016166628A (en) * 2015-03-09 2016-09-15 日本ピラー工業株式会社 Double mechanical seal

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6110171A (en) * 1984-06-22 1986-01-17 Toshiba Corp Mechanical seal
JPH01234660A (en) * 1988-03-15 1989-09-19 Eagle Ind Co Ltd Method of working slide surface of mechanical seal

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6110171A (en) * 1984-06-22 1986-01-17 Toshiba Corp Mechanical seal
JPH01234660A (en) * 1988-03-15 1989-09-19 Eagle Ind Co Ltd Method of working slide surface of mechanical seal

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009144842A (en) * 2007-12-14 2009-07-02 Eagle Ind Co Ltd Mechanical seal
WO2014069098A1 (en) * 2012-11-02 2014-05-08 イーグル工業株式会社 Mechanical seal device
JPWO2014069098A1 (en) * 2012-11-02 2016-09-08 イーグル工業株式会社 Mechanical seal device
EP3048344A3 (en) * 2015-01-21 2016-08-31 United Technologies Corporation Seal housing pre-taper
US10626741B2 (en) 2015-01-21 2020-04-21 United Technologies Corporation Seal housing pre-taper
JP2016166630A (en) * 2015-03-09 2016-09-15 日本ピラー工業株式会社 Dry contact seal
JP2016166624A (en) * 2015-03-09 2016-09-15 日本ピラー工業株式会社 Floating ring type mechanical seal
JP2016166628A (en) * 2015-03-09 2016-09-15 日本ピラー工業株式会社 Double mechanical seal

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