JPH0137260Y2 - - Google Patents
Info
- Publication number
- JPH0137260Y2 JPH0137260Y2 JP3469885U JP3469885U JPH0137260Y2 JP H0137260 Y2 JPH0137260 Y2 JP H0137260Y2 JP 3469885 U JP3469885 U JP 3469885U JP 3469885 U JP3469885 U JP 3469885U JP H0137260 Y2 JPH0137260 Y2 JP H0137260Y2
- Authority
- JP
- Japan
- Prior art keywords
- sliding
- segment seal
- shaft
- tapered
- sliding surface
- 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
- 230000000694 effects Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 230000002093 peripheral effect Effects 0.000 description 6
- 230000003068 static effect Effects 0.000 description 5
- 239000012530 fluid Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
Landscapes
- 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、軸封技術に係る非接触型セグメント
シールに関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a non-contact segment seal related to shaft sealing technology.
従来のセグメントシールは、第９図に示すごと
く２個以上の摺動材１をスリーブ２の回りにコン
プレツシヨンスプリング３とエキスプレツシヨン
スプリング４によつて保持構成されており、シー
ル流体室５の圧力より気体室６の圧力をわずかに
高圧にすることによつて軸封しており、この時、
摺動材１の摺動面Ｓには第７図および第８図に示
すごとく該摺動材１を非接触にするための溝深さ
e0の溝７が構成されている。
As shown in FIG. 9, a conventional segment seal is constructed by holding two or more sliding members 1 around a sleeve 2 by a compression spring 3 and an expression spring 4, and a sealing fluid chamber. The shaft is sealed by making the pressure in the gas chamber 6 slightly higher than the pressure in 5, and at this time,
The sliding surface S of the sliding material 1 has a groove depth to make the sliding material 1 non-contact, as shown in FIGS. 7 and 8.
A groove 7 of e 0 is formed.
しかし、上記摺動材１ができるだけ非接触にな
るためには、エアーフイルム・バネ剛性Ｋができ
るだけ高いことが望ましく、該エアーフイルム・
バネ剛性Ｋは摺動面Ｓの面形状に依存するもので
あるが従来の摺動材１はスリーブ２と摺動面Ｓの
間隙をｈ、溝深さをe0としたときの（ｈ＋e0）／
ｈの値が約100となり、第６図に示すエアーフイ
ルム・バネ剛性Ｋとの関係のグラフで判るように
該エアーフイルム・バネ剛性の効果がほとんど望
まれないものであり、仮に同一形状で溝深さe0を
浅くしても静圧効果の増加は期待できるものの、
回転時の浮力向上は望まれないものであつた。
However, in order for the sliding member 1 to be as non-contact as possible, it is desirable that the air film spring stiffness K is as high as possible.
The spring stiffness K depends on the surface shape of the sliding surface S, but the conventional sliding material 1 has a hardness of (h+e 0 ) when the gap between the sleeve 2 and the sliding surface S is h and the groove depth is )/
The value of h is approximately 100, and as can be seen from the graph of the relationship between the air film and spring stiffness K shown in Figure 6, the effect of the air film spring stiffness is hardly desired. Although an increase in the static pressure effect can be expected even if the depth e 0 is made shallower,
Improvement in buoyancy during rotation was not desired.
本考案は上記問題に鑑み、動圧および静圧効果
が充分に発揮せしめられるセグメントシールの摺
動面形状を構成し、低速および高速の全域にわた
つて非接触状態を維持することのできる非接触型
セグメントシールを提供せんとするものである。 In view of the above-mentioned problems, the present invention has been developed to provide a segment seal with a sliding surface shape that fully exhibits the effects of dynamic pressure and static pressure, and a non-contact structure that can maintain a non-contact state over the entire range of low and high speeds. It is intended to provide a mold segment seal.
すなわち、本考案の非接触型セグメントシール
は、摺動材の摺動面に高圧側軸方向に開いた楔状
テーパを構成し、静圧時における浮力を受けるよ
うに構成すると同時に、該摺動面に回転方向にテ
ーパを有するテーパ段部を形成し、該段部の深さ
ｅと間隙ｈの和に対する該間隙ｈの比（ｈ＋
ｅ）／ｈの値を２ないし５に形成して動圧時にお
ける浮力の増大を図つたことを特徴とするもので
ある。
That is, the non-contact segment seal of the present invention has a wedge-shaped taper that opens in the axial direction on the high-pressure side on the sliding surface of the sliding material, and is configured to receive buoyancy under static pressure. A tapered stepped portion tapered in the rotational direction is formed at , and the ratio of the gap h to the sum of the depth e of the stepped portion and the gap h (h+
e)/h is set to a value of 2 to 5 to increase buoyancy under dynamic pressure.
上記構成において摺動材の摺動面が高圧側軸方
向に傾斜した楔状になつているため、静圧時には
該楔効果によつて外径方向に浮上せしめられ、ス
リーブとの非接触状態を維持する。また高速回転
時にはテーパ溝に流入する流体の排圧によつてス
リーブとの間にエアーフイルム・バネ剛性Ｋの流
体シールを形成し、非接触状態を維持することが
できるものであり、低速から高速全域にわたつて
非接触状態を得ることが可能となる。
In the above configuration, the sliding surface of the sliding material is wedge-shaped inclined in the axial direction on the high pressure side, so when static pressure is applied, the wedge effect causes it to float in the outer radial direction, maintaining a non-contact state with the sleeve. do. In addition, during high-speed rotation, the exhaust pressure of the fluid flowing into the tapered groove forms a fluid seal with the air film spring stiffness K between the sleeve and the sleeve, making it possible to maintain a non-contact state. It becomes possible to obtain a non-contact state over the entire area.
以下、本考案非接触型セグメントシールの一実
施例を第１図ないし第５図にしたがつて説明する
と第１図は摺動材の正面図、第２図は同底面図、
第３図ないし第５図はシヤフトとの関係を示す要
部断面図である。環状に連結してシヤフト８に外
挿嵌合する摺動材１０は周方向に複数に分割した
円弧状部材からなるもので、シヤフト８または該
シヤフト８に外挿したスリーブ９の外周面と対向
する摺動面Ｓを形成するもので、本考案は該摺動
面Ｓの形状にある。該摺動面Ｓは円弧状摺動材１
０の内径面全長にわたつて構成されるもので軸方
向低圧側（矢印Ａ）に周リブ１１を残すごとく形
成したテーパ段部１２はシヤフト８またはスリー
ブ９の外周面と高圧側（矢印Ｂ）に向つて開くよ
うに傾斜した楔状テーパ面１３を形成する。ま
た、該テーパ段部１２の深さe1，e2，e3はシヤフ
ト８の回転方向（矢印Ｒ）に対して徐徐に浅く、
（e1＜e2＜e3）なるように構成されるとともに摺
動面Ｓと外周面の間隙ｈに対する間隙ｈとテーパ
段部の深さe1，e2，e3の和の比がそれぞれ
（ｈ＋e1）／ｈ＝2.0
（ｈ＋e2）／ｈ＝2.5
（ｈ＋e3）／ｈ＝3.0
となるようにテーパ加工してなる。
Hereinafter, one embodiment of the non-contact type segment seal of the present invention will be explained with reference to Figs. 1 to 5. Fig. 1 is a front view of the sliding member, Fig. 2 is a bottom view thereof,
3 to 5 are sectional views of main parts showing the relationship with the shaft. The sliding member 10 connected in an annular manner and externally fitted onto the shaft 8 is composed of an arc-shaped member divided into a plurality of parts in the circumferential direction, and is opposed to the outer peripheral surface of the shaft 8 or the sleeve 9 fitted externally to the shaft 8. The present invention lies in the shape of the sliding surface S. The sliding surface S is an arcuate sliding material 1
The tapered step 12 is formed so as to leave the peripheral rib 11 on the low pressure side (arrow A) in the axial direction, and is connected to the outer peripheral surface of the shaft 8 or sleeve 9 on the high pressure side (arrow B). A wedge-shaped tapered surface 13 is formed which is inclined so as to open toward. Further, the depths e 1 , e 2 , e 3 of the tapered step portions 12 gradually become shallower with respect to the rotation direction (arrow R) of the shaft 8,
(e 1 < e 2 < e 3 ), and the ratio of the sum of the gap h and the depths e 1 , e 2 , e 3 of the tapered step to the gap h between the sliding surface S and the outer peripheral surface is Each is tapered so that (h+e 1 )/h=2.0 (h+e 2 )/h=2.5 (h+e 3 )/h=3.0.
上記構成の摺動材１０を複数個連接して環状の
セグメントシールを構成するもので、シヤフト８
に外挿したスリーブ９の外周面に対し、該セグメ
ントシールの外周に嵌着したコンプレツシヨンス
プリング３の弾性により摺動面Ｓを圧接してなる
ものである。しかるに上記摺動面Ｓに形成した楔
状テーパ面１３がセグメントシールの高圧側（矢
印Ｂ）に開口した傾斜内径を有しているため、楔
効果により静圧時において各摺動材１０は外径方
向の浮力を生ずる。同時に回転時においても、テ
ーパ段部１２の深さがシヤフト８の回転方向（矢
印Ｒ）に向つて徐徐に浅くなつているため、該テ
ーパ段部１２の楔効果により動圧時の浮力が発生
する。このため、低速（静圧時）から高圧（動圧
時）の全域にわたつて摺動材１０に浮力を生じ非
接触型のセグメントシールを構成することができ
る。 A plurality of sliding members 10 having the above configuration are connected to form an annular segment seal, and the shaft 8
The sliding surface S is pressed against the outer circumferential surface of the sleeve 9 inserted into the segment seal by the elasticity of the compression spring 3 fitted on the outer circumference of the segment seal. However, since the wedge-shaped tapered surface 13 formed on the sliding surface S has an inclined inner diameter that opens toward the high pressure side (arrow B) of the segment seal, each sliding member 10 has an outer diameter of Produces directional buoyancy. At the same time, even during rotation, the depth of the tapered step 12 gradually becomes shallower in the direction of rotation of the shaft 8 (arrow R), so the wedge effect of the tapered step 12 generates buoyancy during dynamic pressure. do. Therefore, buoyancy is generated in the sliding member 10 over the entire range from low speed (at static pressure) to high pressure (at dynamic pressure), and a non-contact segment seal can be constructed.
またこのとき摺動面Ｓと外周面の間隙ｈに対す
る該間隙ｈとテーパ段部の深さe1，e2，e3の和の
比が
最小値 （ｈ＋e1）／ｈ＝2.0
最大値 （ｈ＋e3）／ｈ＝3.0
をとるように構成されているため、第６図に示す
エアーフイルム・バネ剛性Ｋの最大値を得ること
ができ確実に摺動材１０を浮上せしめるものであ
る。 Also, at this time, the ratio of the sum of the gap h and the depths e 1 , e 2 , e 3 of the taper step to the gap h between the sliding surface S and the outer peripheral surface is the minimum value (h+e 1 )/h=2.0 maximum value ( Since it is constructed so that h+e 3 )/h=3.0, the maximum value of the air film spring stiffness K shown in FIG. 6 can be obtained and the sliding member 10 can be reliably floated.
以上述べたように本考案のセグメントシールは
低速から高速まですべての範囲において非接触状
態を維持することができるため、低摩耗となり軸
封部の低トルク化が図れると同時に摺動部材等の
長寿命化が可能となる特徴を有し本考案の実用的
効果はきわめて大きい。
As mentioned above, the segment seal of the present invention can maintain a non-contact state in all ranges from low to high speeds, resulting in low wear and low torque in the shaft sealing part, as well as the long length of sliding members etc. The practical effects of the present invention are extremely large as it has the feature of making it possible to extend the service life.
第１図は本考案セグメントシールの一実施例を
示す正面図、第２図は同底面図、第３図ないし第
５図はそれぞれ第１図における−線断面図、
−線断面図および−線断面図とシヤフト
の間係を示す要部端面図、第６図は摺動面段部の
深さと間隙の和に対する間隙の比とエアーフイル
ム・バネ剛性の関係を示すグラフ、第７図は従来
の摺動部材を示す正面図、第８図は同底面図、第
９図は組付状態を示す第７図における−線断
面図である。
８……シヤフト、９……スリーブ、１０……摺
動材、１１……周リブ、１２……テーパ段部、１
３……楔状テーパ面、Ｓ……摺動面、ｈ……間
隙。
FIG. 1 is a front view showing one embodiment of the segment seal of the present invention, FIG. 2 is a bottom view of the same, and FIGS. 3 to 5 are sectional views taken along the - line in FIG. 1, respectively.
- Line sectional view and - line sectional view and end view of essential parts showing the relationship between the shaft, and Figure 6 shows the relationship between the depth of the sliding surface step and the ratio of the gap to the sum of the gaps and the stiffness of the air film spring. 7 is a front view showing a conventional sliding member, FIG. 8 is a bottom view thereof, and FIG. 9 is a sectional view taken along the line -- in FIG. 7 showing an assembled state. 8...Shaft, 9...Sleeve, 10...Sliding material, 11...Peripheral rib, 12...Taper step, 1
3...Wedge-shaped tapered surface, S...Sliding surface, h...Gap.
Claims (1)
状に連結し、シヤフト側外周に嵌合してなるセグ
メントシールにおいて、上記各摺動材の内径摺動
面に高圧側軸方向に開いた楔状テーパ面を有する
テーパ段部をシヤフトの回動方向に徐徐に浅くな
るように構成してなり、セグメントシールに径方
向の浮力を付加したことを特徴とする非接触型セ
グメントシール。 In a segment seal in which arc-shaped sliding members divided into multiple pieces in the circumferential direction are connected in an annular manner and fitted to the outer periphery of the shaft side, the inner diameter sliding surface of each sliding member is opened in the axial direction on the high pressure side. 1. A non-contact type segment seal characterized in that a tapered stepped portion having a wedge-shaped tapered surface is configured to become gradually shallower in the rotating direction of a shaft, thereby adding radial buoyancy to the segment seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3469885U JPH0137260Y2 (en) | 1985-03-13 | 1985-03-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3469885U JPH0137260Y2 (en) | 1985-03-13 | 1985-03-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61152850U JPS61152850U (en) | 1986-09-22 |
| JPH0137260Y2 true JPH0137260Y2 (en) | 1989-11-10 |
Family
ID=30538314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3469885U Expired JPH0137260Y2 (en) | 1985-03-13 | 1985-03-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0137260Y2 (en) |
-
1985
- 1985-03-13 JP JP3469885U patent/JPH0137260Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61152850U (en) | 1986-09-22 |
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