JPS6322375Y2 - - Google Patents
Info
- Publication number
- JPS6322375Y2 JPS6322375Y2 JP6977384U JP6977384U JPS6322375Y2 JP S6322375 Y2 JPS6322375 Y2 JP S6322375Y2 JP 6977384 U JP6977384 U JP 6977384U JP 6977384 U JP6977384 U JP 6977384U JP S6322375 Y2 JPS6322375 Y2 JP S6322375Y2
- Authority
- JP
- Japan
- Prior art keywords
- ring
- retainer
- seal ring
- pressure
- seal
- 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
Links
- 239000012530 fluid Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
Landscapes
- Mechanical Sealing (AREA)
Description
【考案の詳細な説明】
本考案は、軸封技術に係るメカニカルシール、
とくに高圧の条件下に使用されるメカニカルシー
ルの改良に関するものである。[Detailed description of the invention] This invention is a mechanical seal related to shaft sealing technology.
In particular, it relates to the improvement of mechanical seals used under high pressure conditions.
従来からメカニカルシールの一例として、第１
図に示すように、回転軸ａ側に嵌着されて、該回
転軸ａに従動する回転環ｂと、固定部材たるリテ
ーナｃの軸孔段部ｄに嵌入されるシールリングｅ
とを有し、該両者ｂ，ｅの対向端面にて摺動面ｆ
を形成し、高圧のシール流体を密封する内向き流
れ型のメカニカルシールが知られている。このメ
カニカルシールのシールリングｅに掛かる内径方
向の圧力は、前記リテーナｃとシールリングｅの
間に介装されるＯリングｇを境として、後背部寄
り（図においてＯリングｇの左側）の部分では低
圧、また回転環ｂ寄り（図においてＯリングｇの
右側）の部分では高圧力となるため、該シールリ
ングｅは、第２図に示すように、回転環ｂ寄りの
部分が内径方向に押し縮められるように変形す
る。このため、回転環ｂとの摺動面ｆにおいて、
該摺動面ｆの内周側ｆ１に面開きが発生し、他方
該摺動面ｆの外周側ｆ２では局部面圧の増大をも
たらし、したがつて該摺動面ｆに介在する液膜の
部分破損が起こり、これを原因とする該摺動面ｆ
の焼き付き事故が起こり易いという問題を有して
いた。 Traditionally, as an example of mechanical seals,
As shown in the figure, there is a rotating ring b that is fitted on the rotating shaft a side and driven by the rotating shaft a, and a seal ring e that is fitted into the shaft hole stepped portion d of the retainer c that is a fixed member.
and a sliding surface f at the opposing end surfaces of both b and e.
An inward flow type mechanical seal is known that forms a seal and seals a high-pressure seal fluid. The pressure in the inner diameter direction applied to the seal ring e of this mechanical seal is applied to a portion near the rear (to the left of the O ring g in the figure) with the O ring g interposed between the retainer c and the seal ring e as a boundary. As shown in Fig. 2, the pressure is low in the area near the rotating ring b, and the pressure is high in the area near the rotating ring b (the right side of the O-ring g in the figure). Deforms so that it can be compressed. Therefore, on the sliding surface f with the rotating ring b,
A surface opening occurs on the inner circumferential side f1 of the sliding surface f, and on the other hand, an increase in local surface pressure occurs on the outer circumferential side f2 of the sliding surface f, so that the liquid film interposed on the sliding surface f increases. Partial damage occurs, and the sliding surface f caused by this
The problem was that burn-in accidents were likely to occur.
本考案の高圧用メカニカルシールは、上記問題
に鑑みてなされ、これを解消せんとするもので、
以下、これを図面により詳細に説明する。 The high-pressure mechanical seal of the present invention was created in view of the above problems, and is intended to solve these problems.
This will be explained in detail below with reference to the drawings.
第３図は本考案の一実施例を示す要部半裁正断
面図で、ａは回転軸、ｂは前記回転軸ａに従動す
る回転環、c′は固定部材たるリテーナで、ｅは前
記リテーナc′の軸孔段部d′に、該軸孔段部d′内周
の環状溝１，２，３に嵌合されたＯリング４，
５，６を介して嵌入されるシールリングである。
前記リテーナc′には該リテーナc′およびＯリング
４，５、シールリングｅにより仕切られた空隙７
と高圧側空間Ａとを連通するようになる高圧力導
入孔８と、リテーナc′およびＯリング５，６、シ
ールリングｅにより仕切られた空隙９と低圧側空
間Ｂとを連通するようになる低圧力導入孔１０と
が各各周方向に所要数配設されている。 FIG. 3 is a half-cut cross-sectional view of essential parts showing an embodiment of the present invention, in which a is a rotating shaft, b is a rotating ring driven by the rotating shaft a, c' is a retainer that is a fixed member, and e is a retainer. c', an O-ring 4 fitted into the annular grooves 1, 2, 3 on the inner circumference of the shaft hole step d';
This is a seal ring that is fitted through 5 and 6.
The retainer c' has a gap 7 partitioned by the retainer c', O-rings 4 and 5, and a seal ring e.
The high pressure introduction hole 8 communicates with the high pressure side space A, and the low pressure side space B communicates with the gap 9 partitioned by the retainer c', the O rings 5, 6, and the seal ring e. A required number of low pressure introduction holes 10 are arranged in each circumferential direction.
上記構成になる本実施例によれば、シールリン
グｅ外周面に掛かる圧力の分布は、Ｏリング４と
５の間においては高圧力導入孔８によつて高圧と
なり、またＯリング５と６の間においては低圧力
導入孔１０によつて低圧となるので、該シールリ
ングｅは、第４図に示すように後背部寄りの部分
（図においては左側）が内径方向に押し縮められ
るような変形が起こる。したがつて、回転環ｂと
の摺動面ｆにおいて、該摺動面ｆの外周側ｆ２に
面開きが発生し、他方内周側ｆ１の回転環ｂに対
する局部面圧は増大するが、前記外周側ｆ２方向
よりあたかも楔のごとく高圧シール流体が浸入
し、その圧力が摺動面ｆに対して垂直にこれを押
し開く方向に掛かるので、該摺動面ｆには液膜が
常に介在かつ補填されて潤滑が保たれ、液膜切れ
による焼き付きが起こるようなことはない。 According to this embodiment having the above configuration, the pressure distribution on the outer peripheral surface of the seal ring e is high between the O-rings 4 and 5 due to the high pressure introduction hole 8, and between the O-rings 5 and 6. Since the pressure in between is low due to the low pressure introduction hole 10, the seal ring e is deformed so that the part near the back (the left side in the figure) is compressed in the inner radial direction, as shown in Fig. 4. happens. Therefore, on the sliding surface f with the rotating ring b, a surface opening occurs on the outer circumferential side f2 of the sliding surface f, and the local surface pressure on the rotating ring b on the other inner circumferential side f1 increases. The high-pressure sealing fluid enters from the outer peripheral side f2 direction as if it were a wedge, and the pressure is applied perpendicularly to the sliding surface f in the direction of pushing it open, so that a liquid film is always present on the sliding surface f. It is replenished and lubrication is maintained, and there is no possibility of seizure due to lack of liquid film.
以上述べたように本考案は高圧のシール流体を
密封する内向き流れ型のメカニカルシールにおい
て、リテーナの軸孔段部とシールリングとの間に
３本のＯリングを介装し、各部材にて仕切られる
ことにより形成された２つの空隙のうち、回転環
寄りの空隙に対しては低圧力を導入し、他方の空
隙に対しては高圧力を導入する導入孔をそれぞれ
配設することにより、該シールリングの後端近傍
部を内径方向に押し縮めるような圧力分布とし、
該シールリングの摺動面外周部に面開きを生じせ
しめて高圧シール流体の漏洩を促すような構造と
し、よつて常に摺動面間に液膜が介在し潤滑を保
ち、焼き付き事故を防止するもので、本考案の実
用的効果はきわめて大きい。 As described above, the present invention is an inward flow type mechanical seal that seals high-pressure sealing fluid, in which three O-rings are interposed between the shaft hole step of the retainer and the seal ring, and each member is By arranging an introduction hole to introduce low pressure into the gap near the rotating ring and high pressure into the other gap among the two gaps formed by partitioning the , a pressure distribution that compresses the vicinity of the rear end of the seal ring in the inner diameter direction,
The structure is such that a surface opening is created on the outer periphery of the sliding surface of the seal ring to encourage leakage of high-pressure sealing fluid, so that a liquid film is always present between the sliding surfaces to maintain lubrication and prevent seizure accidents. Therefore, the practical effects of this invention are extremely large.
第１図は従来のメカニカルシールの一例を示す
要部半裁正断面図、第２図は高圧時における同メ
カニカルシールの変形状態を示す説明図、第３図
は本考案に係る高圧用メカニカルシールの一実施
例を示す要部半裁正断面図、第４図は同変形状態
を示す説明図である。
１，２，３……環状溝、４，５，６……Ｏリン
グ、８……高圧力導入孔、１０……低圧力導入
孔、ａ……回転軸、ｂ……回転環、c′……リテー
ナ、d′……軸孔段部、ｅ……シールリング、ｆ…
…摺動面。
Fig. 1 is a half-cut sectional view of the main part showing an example of a conventional mechanical seal, Fig. 2 is an explanatory diagram showing the deformed state of the same mechanical seal at high pressure, and Fig. 3 is a diagram of the mechanical seal for high pressure according to the present invention. FIG. 4 is a half-cut cross-sectional view of the main part showing one embodiment, and FIG. 4 is an explanatory view showing the same deformed state. 1, 2, 3... Annular groove, 4, 5, 6... O-ring, 8... High pressure introduction hole, 10... Low pressure introduction hole, a... Rotating shaft, b... Rotating ring, c' ...Retainer, d'...Shaft hole step, e...Seal ring, f...
...Sliding surface.
Claims (1)
させるリテーナの軸孔段部に嵌入されるシールリ
ングとを有し、該回転環と該シールリングの対向
端面にて摺動面を形成し、高圧のシール流体を密
封する内向き流れ型のメカニカルシールにおい
て、リテーナの軸孔段部とシールリングとの間に
３本のＯリングをそれぞれ所要間隔をおいて介装
するとともに、前記リテーナに対し、該リテー
ナ、前記シールリングおよび前記各Ｏリングにて
仕切られることにより形成される空隙のうち回転
環寄りの空隙と低圧側空間とを連通する低圧力導
入孔と、他方、シールリング後背部寄りの空隙と
高圧側空間とを連通する高圧力導入孔を穿設して
なることを特徴とする高圧用メカニカルシール。 It has a rotating ring driven by a rotating shaft, and a seal ring that is fitted into a shaft hole stepped portion of a retainer through which the rotating shaft is inserted, and the opposing end surfaces of the rotating ring and the seal ring form a sliding surface. In an inward flow type mechanical seal that seals a high-pressure sealing fluid, three O-rings are interposed between the shaft hole stepped portion of the retainer and the seal ring at required intervals, and the retainer is provided with three O-rings at required intervals. On the other hand, there is a low pressure introduction hole that communicates a low pressure side space with a space near the rotating ring among the spaces partitioned by the retainer, the seal ring, and each of the O-rings, and a low pressure introduction hole that communicates with the low pressure side space, and a rear part of the seal ring. A high-pressure mechanical seal characterized by having a high-pressure introduction hole that communicates the gap on the side with the high-pressure side space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6977384U JPS60182569U (en) | 1984-05-15 | 1984-05-15 | Mechanical seal for high pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6977384U JPS60182569U (en) | 1984-05-15 | 1984-05-15 | Mechanical seal for high pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60182569U JPS60182569U (en) | 1985-12-04 |
| JPS6322375Y2 true JPS6322375Y2 (en) | 1988-06-20 |
Family
ID=30605763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6977384U Granted JPS60182569U (en) | 1984-05-15 | 1984-05-15 | Mechanical seal for high pressure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60182569U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2554880A4 (en) * | 2010-03-26 | 2013-07-24 | Eagle Ind Co Ltd | Mechanical sealing device |
-
1984
- 1984-05-15 JP JP6977384U patent/JPS60182569U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60182569U (en) | 1985-12-04 |
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