JPH0341114Y2 - - Google Patents
Info
- Publication number
- JPH0341114Y2 JPH0341114Y2 JP1986128944U JP12894486U JPH0341114Y2 JP H0341114 Y2 JPH0341114 Y2 JP H0341114Y2 JP 1986128944 U JP1986128944 U JP 1986128944U JP 12894486 U JP12894486 U JP 12894486U JP H0341114 Y2 JPH0341114 Y2 JP H0341114Y2
- Authority
- JP
- Japan
- Prior art keywords
- seal ring
- side wall
- seal
- housing
- outer diameter
- 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
- 238000007789 sealing Methods 0.000 claims description 27
- 230000001154 acute effect Effects 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
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、例えばポンプ装置などの回転軸の軸
周をシールリングの内周面および端面においてシ
ールする軸封装置の改良に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement in a shaft sealing device that seals the periphery of a rotating shaft of a pump device or the like on the inner peripheral surface and end surface of a seal ring.
従来から、第５図に示すように、機体１に挿通
した回転軸２の軸周をシールする軸封装置におい
て、機体１に嵌着したハウジング３に、回転軸２
の外周に配置するシールリング４を非回転状態に
収容してスナツプリング５で抜け止めし、このシ
ールリング４の内周面とこれに径方向に対向する
回転軸２の外周面とで形成される一次シール部
ａ、およびシールリング４の端面と軸方向に対向
するハウジング側壁３ａの突出端面３ｂとで形成
される二次シール部ｂで軸封機能を営むものがあ
る。
Conventionally, as shown in FIG. 5, in a shaft sealing device that seals the periphery of a rotating shaft 2 inserted into a machine body 1, the rotating shaft 2 is attached to a housing 3 fitted to the machine body 1.
A seal ring 4 disposed on the outer periphery of the seal ring 4 is housed in a non-rotating state and prevented from coming off by a snap spring 5, and is formed by the inner circumferential surface of the seal ring 4 and the outer circumferential surface of the rotating shaft 2 radially opposed thereto. Some act as a shaft seal with a primary seal part a and a secondary seal part b formed by a protruding end surface 3b of a housing side wall 3a that faces the end surface of the seal ring 4 in the axial direction.
しかしながら、上記従来の軸封装置では、圧力
流体を密封する場合、第６図に示すように、二次
シール部ｂを構成するハウジング側壁３ａが、こ
れに直接作用する密封圧力およびシールリング４
の背面に作用する密封圧力によつて、反シールリ
ング側へ僅かに傾斜変形し、このため、シールリ
ング４の端面とハウジング側壁３ａの突出端面３
ｂは鋭角部接触となつて、二次シール部ｂにおけ
るシール性が不安定になり、しかもシールリング
４はつねに密封圧力により軸方向Ｘへの荷重Ｆを
受けていることから、前記突出端面３ｂの角縁部
３b′は、シールリング４の端面に微小に食い込ん
だ状態となる。したがつて、回転軸２の偏心動作
等によりシールリング４の端面がハウジング３の
外径側へ向けてT1方向へ摺動する場合の摺動抵
抗は小さいが、逆方向Y2への摺動抵抗が著しく
大きくなるので、回転軸２の偏心動作に対するシ
ールリング４の追随性が損なわれ、一次シール部
ａにおけるシールリング４の内周面の摩耗が激し
くなつてシール性が早期に低下する問題がある。
However, in the above-mentioned conventional shaft sealing device, when sealing a pressure fluid, the housing side wall 3a constituting the secondary seal portion b prevents the sealing pressure directly acting on the sealing ring 4, as shown in FIG.
Due to the sealing pressure acting on the back surface of the housing, the end surface of the seal ring 4 and the protruding end surface 3 of the housing side wall 3a are deformed slightly toward the opposite side of the seal ring.
b is in contact with an acute angle, and the sealing performance at the secondary seal part b becomes unstable.Moreover, the seal ring 4 is always subjected to a load F in the axial direction X due to the sealing pressure, so the protruding end surface 3b The corner edge 3b' is slightly bitten into the end face of the seal ring 4. Therefore, when the end face of the seal ring 4 slides in the T1 direction toward the outer diameter side of the housing 3 due to eccentric movement of the rotating shaft 2, the sliding resistance is small, but when it slides in the opposite direction Y2 Since the dynamic resistance increases significantly, the ability of the seal ring 4 to follow the eccentric movement of the rotating shaft 2 is impaired, and the inner circumferential surface of the seal ring 4 in the primary seal portion a becomes severely worn, resulting in early deterioration of sealing performance. There's a problem.
本考案は、このような点に鑑み、シールリング
の径方向への追随性を高めて一次シール部での摩
耗を抑制するとともに、二次シール部におけるシ
ール性の安定を図ることを目的とするものであ
る。 In view of these points, the purpose of this invention is to improve the radial followability of the seal ring to suppress wear at the primary seal part, and to stabilize the sealing performance at the secondary seal part. It is something.
上記問題点を解決するため、本考案に掛かる軸
封装置は、シールリングに対するハウジング側壁
の密封部がなだらから鈍角状断面をなす周方向に
連続した突部からなり、密封圧力による前記側壁
の傾斜変形角度の最大値をθとしたとき、前記突
部の外径が、外径側へ向けて2θの角度で後退する
テーパ面をなす構成とした。
In order to solve the above-mentioned problems, the shaft sealing device according to the present invention has a sealing portion of the side wall of the housing with respect to the seal ring consisting of a protrusion continuous in the circumferential direction with a sloped to obtuse cross section, and the side wall is inclined due to the sealing pressure. When the maximum value of the deformation angle is θ, the outer diameter of the protrusion has a tapered surface that recedes toward the outer diameter at an angle of 2θ.
本考案によると、ハウジングの側壁が、これに
直接作用する密封圧力、およびこの側壁へシール
リングを押し付ける方向に作用する密封圧力を受
けて反シールリング側へ角度θの範囲内で傾斜変
形することによつて、シールリングの端面に対し
てなだらかな鈍角状断面をなす周方向に連続した
突部で接触し、鋭角的な食い込みがないので、こ
の結果シールリングの径方向への追従動作に対す
る抵抗が小さくなり、しかも前記傾斜変形によつ
て、前記側壁に外径テーパ面とシールリング端面
のなす角度が前記変形角度θと同等の角度まで小
さくなるので、二次シール部における内径側への
漏れ圧力に対する減衰力が大きくなる。
According to the present invention, the side wall of the housing is tilted and deformed within the range of angle θ toward the side opposite to the seal ring in response to the sealing pressure that acts directly on the side wall and the sealing pressure that acts in the direction of pressing the seal ring against the side wall. This makes contact with the end face of the seal ring at a circumferentially continuous protrusion with a gentle obtuse cross section, and there is no sharp bite, resulting in resistance to the seal ring's radial follow-up movement. Moreover, due to the inclined deformation, the angle formed by the outer diameter tapered surface of the side wall and the end face of the seal ring becomes smaller to an angle equivalent to the deformation angle θ, so that leakage to the inner diameter side at the secondary seal portion is reduced. Damping force against pressure increases.
以下、本考案を、図示の実施例を参照しながら
説明する。なお、各実施例において、先の第５図
および第６図に示す従来構造の軸封装置と構成が
重複する部分は同一符号を用い、その説明は省略
する。
Hereinafter, the present invention will be explained with reference to the illustrated embodiments. In each embodiment, the same reference numerals are used for the parts having the same structure as those of the conventional shaft sealing device shown in FIGS. 5 and 6, and the explanation thereof will be omitted.
第１図は本考案に係る軸封装置の第一実施例を
示すもので、二次シール部ｂにおけるシールリン
グ４の端面に対するハウジング３の側壁３１の密
接部が、なだらかな鈍角状断面をなす周方向に連
続した突部３２からなり、この突部３２は、外径
側へ向けて反シールリング側へなだらかに後退し
た外径テーパ面３３と、この外径テーパ面３３の
内径からシールリング４の端面と平行に延びる平
面３４で形成されている。また、前記外径テーパ
面３３のテーパかくど密封空間Ｓの圧力作用時に
おける側壁３１の傾斜変形角度の最大値をθとす
ると、角度2θとなつている。 FIG. 1 shows a first embodiment of the shaft sealing device according to the present invention, in which a portion of the side wall 31 of the housing 3 in close contact with the end surface of the seal ring 4 in the secondary seal portion b forms a gently obtuse cross section. Consisting of a protrusion 32 continuous in the circumferential direction, this protrusion 32 has an outer diameter tapered surface 33 that gently retreats toward the outer diameter side toward the side opposite to the seal ring, and a seal ring from the inner diameter of this outer diameter tapered surface 33. It is formed by a flat surface 34 extending parallel to the end surface of 4. Furthermore, if the maximum value of the tilt deformation angle of the side wall 31 when the pressure of the tapered sealed space S of the outer diameter tapered surface 33 is applied is θ, then the angle is 2θ.
上記構成によると、ハウジング３の側壁３１
は、密封空間Ｓの圧力による傾斜変形を受けてい
ない場合は二次シール部ｂは平面同士の接触とな
つているが、密封空間Ｓの圧力を受けて反シール
リング側へ傾斜変形すると、前記側壁３１は、第
２図に示すように、シールリング４の端面に対す
る突部３２で接触し、この突部３２は180°−2θの
なだらかな鈍角状断面をなす周方向に連続した形
状であることから、シールリング４の端面への鋭
角的な食い込みはなく、したがつて、シールリン
グ４は回転軸２の径方向への偏心運動に円滑に追
随し、一次シール部ａにおけるシールリング４の
内周面の摩耗が抑制される。しかもこのとき、前
記外径テーパ面３３とシールリング４のなす角度
がθまで減少し得ることから、二次シール部ｂに
おける内径側への漏れ圧力に対する減衰力が大き
くなり、安定したシール性を維持する。 According to the above configuration, the side wall 31 of the housing 3
When the secondary seal part b is not subjected to tilting deformation due to the pressure of the sealed space S, the secondary seal parts b are in plane-to-plane contact, but when the secondary seal part b is tilted and deformed toward the side opposite to the seal ring due to the pressure of the sealed space S, As shown in FIG. 2, the side wall 31 contacts the end surface of the seal ring 4 at a protrusion 32, and this protrusion 32 has a continuous circumferential shape with a gentle obtuse cross section of 180°-2θ. Therefore, the seal ring 4 does not bite into the end face at an acute angle, and therefore the seal ring 4 smoothly follows the eccentric movement of the rotating shaft 2 in the radial direction, and the seal ring 4 at the primary seal portion a Wear on the inner peripheral surface is suppressed. Moreover, at this time, since the angle formed between the outer diameter tapered surface 33 and the seal ring 4 can be reduced to θ, the damping force against the leakage pressure toward the inner diameter side in the secondary seal portion b increases, and stable sealing performance is maintained. maintain.
次に、第３図は本考案に係る第二実施例を示
し、二次シール部ｂにおけるハウジング側壁３１
の突部３２が、前記外径テーパ面３３と、内径側
へ向けてシールリング４の端面から軸方向になだ
らかに後退する内径テーパ面３５とで形成されて
なるもので、前記側壁３１が傾斜変形を受けてい
ない状態でも、常にシールリング４の端面に対し
て突部３２で接触するようにしたものである。こ
の場合、前記内径テーパ面３５のテーパ角度は、
θ〜2θに設定される。 Next, FIG. 3 shows a second embodiment of the present invention, in which a housing side wall 31 in the secondary seal part b
The protrusion 32 is formed by the outer diameter tapered surface 33 and the inner diameter tapered surface 35 that gently recedes in the axial direction from the end surface of the seal ring 4 toward the inner diameter side, and the side wall 31 is inclined. Even in a state where the seal ring 4 is not deformed, the protrusion 32 is always in contact with the end surface of the seal ring 4. In this case, the taper angle of the inner diameter tapered surface 35 is
It is set between θ and 2θ.
以上、本考案によると、ハウジングの側壁が密
封圧力を受けて反シールリング側へ傾斜変形して
も、シールリングの端面に対して鋭角的な食い込
みが生じることがなく、なだらかな鈍角状断面を
なす周方向に連続した突部で接触することから、
回転軸に対するシールリングの径方向への追従動
作が円滑になつて一次シール部での摩耗が抑制さ
れ、しかも前記側壁の外径テーパ面とシールリン
グ端面のなす角度がきわめて小さくなるので、二
次シール部における内径側への漏れ圧力が減衰さ
れて優れたシール性を発揮するものである。
As described above, according to the present invention, even if the side wall of the housing is subjected to sealing pressure and deforms incliningly toward the side opposite to the seal ring, the end face of the seal ring does not bite into the end face at an acute angle, and a gently obtuse-angled cross section is formed. Because the contact occurs through continuous protrusions in the circumferential direction,
The seal ring follows the rotating shaft in the radial direction smoothly, suppressing wear on the primary seal, and the angle between the outer diameter tapered surface of the side wall and the end face of the seal ring becomes extremely small. Leakage pressure toward the inner diameter side of the seal portion is attenuated to provide excellent sealing performance.
第１図は本考案に係る軸封装置の第一実施例を
示す要部概略的断面図、第２図は同じく密封圧力
作用時の変形状態を示す要部概略的断面図、第３
図は本考案の第二実施例を示す要部概略的断面
図、第４図は同じく密封圧力作用時の変形状態を
示す要部概略的断面図、第５図は従来の軸封装置
の要部概略的断面図、第６図は同じく密封圧力作
用時の変形状態を示す要部概略的断面図である。
２……回転軸、３……ハウジング、３１……側
壁、３２……突部、３３……外径テーパ面、３４
……平面、３５……内径テーパ面、４……シール
リング、ａ……一次シール部、ｂ……二次シール
部。
FIG. 1 is a schematic cross-sectional view of the main part showing the first embodiment of the shaft sealing device according to the present invention, FIG. 2 is a schematic cross-sectional view of the main part showing the deformed state when sealing pressure is applied, and FIG.
The figure is a schematic cross-sectional view of the main part showing the second embodiment of the present invention, FIG. 4 is a schematic cross-sectional view of the main part showing the deformation state when sealing pressure is applied, and FIG. Fig. 6 is a schematic sectional view of the main part showing a deformed state when sealing pressure is applied. 2...Rotating shaft, 3...Housing, 31...Side wall, 32...Protrusion, 33...Outer diameter tapered surface, 34
...Flat surface, 35...Inner diameter tapered surface, 4...Seal ring, a...Primary seal portion, b...Secondary seal portion.
Claims (1)
方向移動自在に設け、シールリングの内周とこれ
に径方向に対向する回転軸周とで形成される一次
シール部、およびシールリングの端面とこれに軸
方向に対向するハウジング側壁とで形成される二
次シール部で軸封してなる軸封装置において、シ
ールリングに対するハウジング側壁の密接部がな
だらかな鈍角状断面をなす周方向に連続した突部
からなり、密封圧力による前記側壁の傾斜変形角
度の最大値をθとしたとき、前記突部の外径が、
外径側へ向けて2θの角度で後退するテーパ面をな
すことを特徴とする軸封装置。 A seal ring is provided between the rotating shaft and the housing so as to be movable in the radial direction, and a primary seal portion is formed by the inner periphery of the seal ring and the periphery of the rotating shaft radially opposed to the inner periphery of the seal ring, and the end face of the seal ring and this In a shaft sealing device in which the shaft is sealed with a secondary seal formed by a housing side wall facing axially, the housing side wall has a continuous protrusion in the circumferential direction with a gentle obtuse-angled cross section. The outer diameter of the protrusion is
A shaft sealing device characterized by forming a tapered surface that recedes at an angle of 2θ toward the outer diameter side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986128944U JPH0341114Y2 (en) | 1986-08-26 | 1986-08-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986128944U JPH0341114Y2 (en) | 1986-08-26 | 1986-08-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6336693U JPS6336693U (en) | 1988-03-09 |
| JPH0341114Y2 true JPH0341114Y2 (en) | 1991-08-29 |
Family
ID=31025076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986128944U Expired JPH0341114Y2 (en) | 1986-08-26 | 1986-08-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0341114Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070080503A1 (en) * | 2003-11-05 | 2007-04-12 | Arai Seisakusho Co., Ltd. | Sealing device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5727963Y2 (en) * | 1978-03-13 | 1982-06-18 |
-
1986
- 1986-08-26 JP JP1986128944U patent/JPH0341114Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6336693U (en) | 1988-03-09 |
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