JPH0238135Y2 - - Google Patents
Info
- Publication number
- JPH0238135Y2 JPH0238135Y2 JP1985021791U JP2179185U JPH0238135Y2 JP H0238135 Y2 JPH0238135 Y2 JP H0238135Y2 JP 1985021791 U JP1985021791 U JP 1985021791U JP 2179185 U JP2179185 U JP 2179185U JP H0238135 Y2 JPH0238135 Y2 JP H0238135Y2
- Authority
- JP
- Japan
- Prior art keywords
- elastic ring
- seal ring
- ring
- pressing force
- sealing 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
- 238000007789 sealing Methods 0.000 description 19
- 239000012530 fluid Substances 0.000 description 12
- 230000008094 contradictory effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Sealing Devices (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は弾性リングとバツクアツプリングとの
組合せからなる往復動用シールリングで、特に低
摩擦用シールリングの改良に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a reciprocating seal ring consisting of a combination of an elastic ring and a back-up spring, and particularly relates to an improvement of a low-friction seal ring.
この種往復動用シールリングの形状は従来は第
２図のとおりである。図において１′は中央に環
状突起１１′を有する概ね山の字形断面の弾性リ
ングであり、２′，２′はバツクアツプリングであ
る。
Conventionally, the shape of this type of reciprocating seal ring is as shown in FIG. In the figure, 1' is an elastic ring having a generally chevron-shaped cross section and has an annular protrusion 11' in the center, and 2' and 2' are back-up springs.
この種往復動用シールリングへの要求特性は、
寿命の面から、シール面への押圧力は出来るだ
け小さくすること、但し、シール面からの圧力
流体の漏れをなくすこと。ところが、第２図の従
来の往復動用シールリングにおいては、シール面
への押圧力を小さくするため、弾性リング１′部
の肉厚を薄くすると、往復動の開始時にシール部
から圧力流体の漏れが生じた。このため、従来は
止むを得ず、弾性リング１′部の肉厚をやや厚く
して、即ちシール面への押圧力をやや大きくし
て、往復動開始時の圧力流体の漏れを出来るだけ
防止していた。従つて、シール部の摩耗が早くな
り、シールの製品寿命の点でやや不満を残してい
た。
The required characteristics for this type of reciprocating seal ring are:
From the perspective of longevity, the pressure on the sealing surface should be as small as possible, but leakage of pressure fluid from the sealing surface should be avoided. However, in the conventional seal ring for reciprocating motion shown in Fig. 2, if the wall thickness of the elastic ring 1' is made thinner in order to reduce the pressing force on the sealing surface, pressure fluid leaks from the sealing section at the start of reciprocating motion. occurred. For this reason, in the past, it was unavoidable to make the wall thickness of the elastic ring 1' a little thicker, that is, to make the pressing force against the sealing surface a little larger, to prevent the leakage of pressurized fluid as much as possible at the start of reciprocating motion. Was. Therefore, the seal portion wears out quickly, leaving some dissatisfaction with the product life of the seal.
なお、バツクアツプリングは押圧力が高いと摩
耗と同時に異物が発生し、この異物が弾性リング
の環状突起のシール部に傷を生じさせ易くしてい
る。 It should be noted that when a back-up spring is subjected to a high pressing force, foreign matter is generated as well as wear, and this foreign matter tends to cause damage to the sealing portion of the annular projection of the elastic ring.
本考案は前記２点の相反する要求特性を満足さ
せて従来製品の長寿命化を狙いとしたものであ
り、バツクアツプリングの外方に位置する弾性リ
ング部に軸方向に開口する環状溝を設けたことを
特徴とする。
The present invention aims to extend the life of conventional products by satisfying the above two contradictory required characteristics.The present invention aims to extend the lifespan of conventional products by satisfying the above two contradictory required characteristics. It is characterized by having been provided.
弾性リングに軸方向に開口させて設けた環状溝
の大きさの適宜調節することにより弾性リング及
びバツクアツプリングをシール面に押圧するため
の力を小さくすることができ、この結果、弾性リ
ング及びバツクアツプリングのシール面での摩擦
抵抗が小さくなり、摩擦も減少し、従つてシール
リングは長寿命となる。また、往復動の開始時に
おいては、加圧されると圧力流体は瞬間的に環状
溝の内壁を加圧し、シール面に対する押圧力が素
早く作用して、シール部分からの圧力流体の漏れ
が殆どなくなる。従つて、往復動作動開始時の動
きが良好となる。
By appropriately adjusting the size of the annular groove opened in the axial direction of the elastic ring, the force for pressing the elastic ring and back-up spring against the sealing surface can be reduced, and as a result, the elastic ring and The frictional resistance on the sealing surface of the back-up spring is reduced, the friction is also reduced, and the sealing ring has a longer life. In addition, at the start of reciprocating motion, when pressurized, the pressure fluid instantaneously pressurizes the inner wall of the annular groove, and the pressing force against the sealing surface acts quickly, so that almost no leakage of pressure fluid from the sealing part occurs. It disappears. Therefore, the movement at the start of the reciprocating motion is good.
第１図は本考案に係るシールリングの一実施例
の断面図であり、図において、１は中央に環状突
起１１を有する概ね逆山の字形断面の弾性リング
であり、２，２はバツクアツプリングであり環状
突起１１を両側から挾持する。１２，１２はバツ
クアツプリング２，２の外方に位置する弾性リン
グ部に設けた２つの環状溝である。３はロツドで
ある。弾性リング１は例えばふつ素ゴム、ニトリ
ルゴム等から成り、バツクアツプリング２，２は
例えば４弗化エチレン樹脂（フイラー入りを含
む）から成る。環状溝１２，１２の深さ、幅は、
用途に応じて適宜決定する。バツクアツプリング
２，２には中間にバイアスカツトのような割りを
入れても良い。
FIG. 1 is a cross-sectional view of one embodiment of a seal ring according to the present invention. In the figure, 1 is an elastic ring having an annular protrusion 11 in the center and has a generally inverted chevron-shaped cross section, and 2 and 2 are back-up rings. It is a ring and holds the annular projection 11 from both sides. Reference numerals 12 and 12 indicate two annular grooves provided in the elastic ring portions located outside of the back-up springs 2, 2. 3 is Rod. The elastic ring 1 is made of, for example, fluorocarbon rubber, nitrile rubber, etc., and the back-up rings 2, 2 are made of, for example, tetrafluoroethylene resin (including filler-containing). The depth and width of the annular grooves 12, 12 are
Decide as appropriate depending on the purpose. The backup springs 2, 2 may be provided with a bias cut in the middle.
往復動の開始時のシール面への押圧力のかかり
方につき以下に説明する。説明の都合上まず第２
図の従来例の場合を説明する。第２図のシールリ
ングが第１図の状態に装着され、図の左方から圧
力流体により加圧されたとすると、シールリング
装着溝の左側の内壁とシールリングの間に充満し
た圧力流体により、シールリングは右方に移動し
て装着溝の右側の内壁に当接し、その後、さらに
弾性リング１′は、軸方向からの押圧力を受ける
ことによりシール面への押圧力（軸方向に直角な
方向への押圧力）を高める。即ち、従来のシール
リングにおいては、シールリングが装着溝の右側
の内壁に当接するまでは、圧力流体により押圧力
をシール面に作用させることが出来ない。 The manner in which pressing force is applied to the sealing surface at the start of reciprocation will be explained below. For convenience of explanation, I will explain the second part first.
The case of the conventional example shown in the figure will be explained. If the seal ring shown in Figure 2 is installed in the state shown in Figure 1 and pressurized by pressure fluid from the left side of the figure, the pressure fluid filled between the left inner wall of the seal ring installation groove and the seal ring will cause The seal ring moves to the right and comes into contact with the right inner wall of the mounting groove, and then the elastic ring 1' receives a pressing force from the axial direction, thereby increasing the pressing force against the sealing surface (perpendicular to the axial direction). direction). That is, in the conventional seal ring, no pressing force can be applied to the sealing surface by the pressure fluid until the seal ring comes into contact with the right inner wall of the mounting groove.
しかるに第１図の本考案に係るシールリングで
は、圧力流体が加圧されると環状溝１２内の圧力
流体は弾性リング１を軸方向に押圧すると同時に
シール面への押圧力も発生させる。従つて、本シ
ールリングの場合は、加圧流体によるシール面へ
の押圧力は、シールリングがシールリングの装着
溝の右側の内壁に当接する前に発生する。このた
め、このシール面への押圧力の瞬間的発生によ
り、加圧開始時の圧力流体の漏れを防止出来る。 However, in the seal ring according to the present invention shown in FIG. 1, when the pressure fluid is pressurized, the pressure fluid in the annular groove 12 presses the elastic ring 1 in the axial direction and at the same time generates a pressing force against the sealing surface. Therefore, in the case of this seal ring, the pressing force against the seal surface by the pressurized fluid is generated before the seal ring contacts the inner wall on the right side of the mounting groove of the seal ring. Therefore, by instantaneously generating a pressing force on the sealing surface, leakage of the pressurized fluid at the start of pressurization can be prevented.
上記では外周面シール用の実施例を示したが、
内周面シール用でも良いことは勿論である。 The above example shows an example for sealing the outer circumferential surface.
Of course, it may also be used for sealing the inner peripheral surface.
本考案は上述のとおり、バツクアツプリングの
外方に位置する弾性リング部に軸方向に開口する
環状溝を設ける構成としたので、弾性リングのシ
ール面に対する押圧力を小さく抑えながら、往復
動開始時の圧力流体の漏れを防止することがで
き、この結果弾性リング及びバツクアツプリング
の摩耗が減少し、シールリングの寿命が飛躍的に
向上した。
As mentioned above, this invention has a structure in which an annular groove that opens in the axial direction is provided in the elastic ring part located outside the back-up spring, so that the reciprocating movement can be started while suppressing the pressing force against the sealing surface of the elastic ring. As a result, the wear of the elastic ring and back-up spring is reduced, and the life of the seal ring is dramatically improved.
また、環状溝の大きさを変えることにより、弾
性リングに対する押圧力を自由に調節できる。 Further, by changing the size of the annular groove, the pressing force against the elastic ring can be freely adjusted.
第１図は本考案に係るシールリングの一実施例
の断面図、第２図は従来のシールリングの断面図
である。
図において、１……弾性リング、２……バツク
アツブリング、１１……環状突起、１２……環状
溝。
FIG. 1 is a sectional view of an embodiment of a seal ring according to the present invention, and FIG. 2 is a sectional view of a conventional seal ring. In the figure, 1... elastic ring, 2... back ring, 11... annular projection, 12... annular groove.
Claims (1)
面の弾性リング１と、上記環状突起１１の両側に
配し弾性リング１に把持された二つのバツクアツ
プリング２，２とよりなり断面略角形であつて、
バツクアツプリング２，２の外方に位置する弾性
リング部に軸方向に開口する環状溝１２，１２を
設けたことを特徴とする往復動用シールリング。 It consists of an elastic ring 1 having a generally inverted chevron-shaped cross section with an annular protrusion 11 in the center, and two back-up springs 2, 2 disposed on both sides of the annular protrusion 11 and held by the elastic ring 1, and having a substantially rectangular cross section. It's hot,
A reciprocating seal ring characterized in that annular grooves 12, 12 opening in the axial direction are provided in elastic ring portions located outside of the back-up springs 2, 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985021791U JPH0238135Y2 (en) | 1985-02-18 | 1985-02-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985021791U JPH0238135Y2 (en) | 1985-02-18 | 1985-02-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61139356U JPS61139356U (en) | 1986-08-29 |
| JPH0238135Y2 true JPH0238135Y2 (en) | 1990-10-15 |
Family
ID=30513508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985021791U Expired JPH0238135Y2 (en) | 1985-02-18 | 1985-02-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0238135Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS513028A (en) * | 1974-06-25 | 1976-01-12 | Masanobu Hamazaki | ATSURYOKUHATSUSEIZAIOSHOSHITA GASUSHADANSOCHI |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57187961U (en) * | 1981-05-26 | 1982-11-29 |
-
1985
- 1985-02-18 JP JP1985021791U patent/JPH0238135Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS513028A (en) * | 1974-06-25 | 1976-01-12 | Masanobu Hamazaki | ATSURYOKUHATSUSEIZAIOSHOSHITA GASUSHADANSOCHI |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61139356U (en) | 1986-08-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3215441A (en) | Resilient seal and distortion controlling means therefor | |
| US4449721A (en) | Split piston ring having stepped ends | |
| US3521893A (en) | Nonextrusion ring | |
| US4052112A (en) | Piston seal | |
| US2765204A (en) | Sealing device | |
| JPH0741969Y2 (en) | O-ring | |
| US6158744A (en) | Seal arrangement providing a seal between a bore and a rod movable in the bore | |
| JPH0238135Y2 (en) | ||
| JPH0139967Y2 (en) | ||
| JP2506246Y2 (en) | Packing | |
| JPS623577Y2 (en) | ||
| JPH0235272A (en) | Back-up ring | |
| JPS6240208Y2 (en) | ||
| JPH0744852Y2 (en) | Packing | |
| JPH0215076Y2 (en) | ||
| JPH031661Y2 (en) | ||
| JPH0446116Y2 (en) | ||
| JPH0613424Y2 (en) | Sealing device | |
| JP3338189B2 (en) | Reciprocating sealing device | |
| JPS6137905Y2 (en) | ||
| JPH0215077Y2 (en) | ||
| JPH0529589Y2 (en) | ||
| JPH0141975Y2 (en) | ||
| JPH0615163Y2 (en) | Packing | |
| JPS6027256Y2 (en) | Sealing device |