JPH071552Y2 - Oil seal - Google Patents
Oil sealInfo
- Publication number
- JPH071552Y2 JPH071552Y2 JP1989018632U JP1863289U JPH071552Y2 JP H071552 Y2 JPH071552 Y2 JP H071552Y2 JP 1989018632 U JP1989018632 U JP 1989018632U JP 1863289 U JP1863289 U JP 1863289U JP H071552 Y2 JPH071552 Y2 JP H071552Y2
- Authority
- JP
- Japan
- Prior art keywords
- lip
- seal
- oil
- aqueous solution
- shaft
- 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 - Lifetime
Links
- 239000007864 aqueous solution Substances 0.000 claims description 26
- 238000007789 sealing Methods 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Sealing With Elastic Sealing Lips (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、オイルシールに係るものであり、詳しくは、
水溶液と油を分離封止するダブルリップ型オイルシール
のシールリップ構造に関するものである。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an oil seal.
The present invention relates to a seal lip structure of a double lip type oil seal that separates and seals an aqueous solution and oil.
従来この種のオイルシールとしては、第２図に示す、略
Ｌ字状の断面形状を呈する金属製補強環にゴム様弾性体
を加硫接着し、ゴム様弾性体で製せられた水溶液を封止
する第１のシールリップと油を封止する第２のシールリ
ップを反対方向に向けて配列し、シールリップを軸へ押
圧するスプリングを装着したものが広く知られている。Conventionally, as this type of oil seal, a rubber-like elastic body is vulcanized and adhered to a metal reinforcing ring having a substantially L-shaped cross-sectional shape as shown in FIG. 2, and an aqueous solution made of the rubber-like elastic body is used. It is widely known that a first seal lip for sealing and a second seal lip for sealing oil are arranged in opposite directions, and a spring for pressing the seal lip against a shaft is mounted.
〔考案が解決しようとする課題〕 従来の技術で述べたものは、水溶液と油を分離封止する
ことができるものの、水溶液を封止する第１のシールリ
ップは潤滑不足となり、第１のシールリップのリップ先
端の摩耗を速めることとなり、締代を低下させ、長期間
安定した封止性能を維持できないという問題点を有して
いた。[Problems to be Solved by the Invention] Although the prior art can separate and seal the aqueous solution and the oil, the first seal lip that seals the aqueous solution has insufficient lubrication and the first seal There is a problem in that the wear of the lip tip of the lip is accelerated, the tightening margin is reduced, and stable sealing performance cannot be maintained for a long period of time.
本考案は、従来の技術の有するこのような問題点に鑑み
てなされたものであり、その目的とするところは、水溶
液を封止する第１のシールリップの潤滑不足を解消する
ことでリップ先端の摩耗を少なくし、長期間安定した封
止性能を有するオイルシールの構造を提供しようとする
ものである。The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to eliminate the insufficient lubrication of the first seal lip that seals the aqueous solution to thereby eliminate the lip tip. The present invention aims to provide a structure of an oil seal which has less wear and has stable sealing performance for a long period of time.
上記目的を達成するために、本考案におけるオイルシー
ルは、ゴム様弾性体により水溶液を封止する第１のシー
ルリップと油を封止する第２のシールリップを形成し、
第１のシールリップの水溶液側に、略軸方向に伸びた副
リップを一体に付設し、副リップの第１のシールリップ
側斜面に水溶液を押し戻す方向のスパラルリブを設け、
更に、油を封止する第２のシールリップは、第２のシー
ルリップを押圧するスプリングの中心線を第２のシール
リップのリップ先端より油側へずらし、該リップ先端と
軸とが成す斜面のうち、油側の斜面と軸との成す油面角
αを油側と反対の斜面と軸とが成すシール角βより小さ
くする構成と成すものである。To achieve the above object, the oil seal of the present invention comprises a first seal lip for sealing an aqueous solution and a second seal lip for sealing oil by a rubber-like elastic body.
A sub-lip extending substantially in the axial direction is integrally attached to the aqueous solution side of the first seal lip, and a spiral rib for pushing back the aqueous solution is provided on the first seal lip side slope of the sub-lip.
Further, the second seal lip that seals oil shifts the center line of the spring that presses the second seal lip toward the oil side from the lip tip of the second seal lip, and forms a slope between the lip tip and the shaft. Of these, the oil surface angle α formed by the oil-side slope and the shaft is smaller than the seal angle β formed by the oil-side slope and the shaft opposite to the oil side.
上記構成を備えたオイルシールによれば、軸が回転する
と第１のシールリップに付設したスパイラルリブ付きの
副リップにより水溶液を水溶液側へ押し戻すので第１の
シールリップと副リップとの間に形成される空間に負圧
が生じ、その結果第１のシールリップと副リップが軸へ
押圧され、第１のシールリップへの水溶液の侵入に対す
る強固な防止機能を示すとともに、第２のシールリップ
は油を極微量第１のシールリップ方向へ侵入させ、該侵
入した油が第１のシールリップに潤滑作用を与え、第１
のシールリップの摩耗を防止する作用をもたらす。According to the oil seal having the above configuration, when the shaft rotates, the aqueous solution is pushed back to the aqueous solution side by the auxiliary lip with the spiral rib attached to the first seal lip, so that it is formed between the first seal lip and the auxiliary lip. A negative pressure is generated in the space to be held, and as a result, the first seal lip and the sub lip are pressed against the shaft, which has a strong preventing function against the intrusion of the aqueous solution into the first seal lip, and the second seal lip is A very small amount of oil penetrates in the direction of the first seal lip, and the oil that has entered gives a lubricating action to the first seal lip,
This brings about an effect of preventing wear of the seal lip.
以下に本考案の実施例について図面を参照して説明す
る。Embodiments of the present invention will be described below with reference to the drawings.
第１図において、オイルシールはゴム様弾性体１と金属
製補強環２を加硫接着することで一体化し、スプリング
３を装着して構成されており、軸４と同芯に組合わされ
たハウジング５の間に装着される。In FIG. 1, the oil seal is formed by vulcanizing and adhering a rubber-like elastic body 1 and a metal-made reinforcing ring 2, and is equipped with a spring 3. The housing is combined with a shaft 4 concentrically. It is installed between 5.
さらに詳しくは、水溶液Ａ側と油Ｂ側の間を分離封止す
るために、ゴム様弾性体１で第１のシールリップ６と第
２のシールリップ７を形成し、水溶液Ａを封止する第１
のシールリップ６には第１のシールリップ６の軸４と接
触するリップ先端８から水溶液Ａ側へ略三角形の空間９
を有する環状の副リップ10を水溶液Ａ側へ設け、副リッ
プ10の軸４と接触するリップ先端11からの軸４とで成す
反水溶液側斜面12へ水溶液Ａを押し戻す方向のスパイラ
ルリブ13が設けられている。More specifically, in order to separate and seal the aqueous solution A side and the oil B side, the rubber-like elastic body 1 forms the first seal lip 6 and the second seal lip 7 to seal the aqueous solution A. First
The seal lip 6 has a substantially triangular space 9 from the lip tip 8 that contacts the shaft 4 of the first seal lip 6 toward the aqueous solution A side.
A ring-shaped sub-lip 10 is provided on the side of the aqueous solution A, and a spiral rib 13 for pushing back the aqueous solution A is provided on an anti-aqueous-solution side slope 12 formed by the shaft 4 from the lip tip 11 contacting the shaft 4 of the sub-lip 10. Has been.
また、油Ｂを封止する第２のシールリップ７は、スプリ
ング３の中心を逆オフセット、即ち、第２のシールリッ
プ７の軸４と接触するリップ先端14より油Ｂ側にスプリ
ング３の中心線Ｃを有するように配置するとともに、第
２のシールリップ７と軸４とで形成する斜面15、16の軸
４との角度を、油Ｂ側の斜面15が軸４と成す油面角α
を、反油側の斜面16が軸４と成すシール角βより小さく
設けられている。Further, the second seal lip 7 for sealing the oil B is offset from the center of the spring 3 in other words, that is, the center of the spring 3 is closer to the oil B than the lip tip 14 that contacts the shaft 4 of the second seal lip 7. While being arranged so as to have the line C, the angle between the slopes 15 and 16 formed by the second seal lip 7 and the shaft 4 with respect to the shaft 4 is the oil surface angle α formed by the slope 15 on the oil B side with the shaft 4.
The slope 16 on the non-oil side is smaller than the seal angle β formed with the shaft 4.
比較実験例 本考案によるオイルシールと従来技術のオイルシールを
水冷式エンジンのウォーターポンプに組み込んで同一条
件による走行実験を行ったところ、従来技術のオイルシ
ールは走行距離1500kmで使用不能となり、本考案のオイ
ルシールは走行距離3500kmでも異常がなかった。Comparative experiment example When the oil seal according to the present invention and the conventional oil seal were installed in the water pump of a water-cooled engine and a running test was conducted under the same conditions, the conventional oil seal became unusable at a mileage of 1500 km. The oil seal of Nothing was normal even after traveling 3500km.
なお、本考案における副リップの形状、スパイラルリブ
の角度、高さ等は、前記実施例に限定されるものではな
く、必要に応じて変更するとよい。The shape of the sub-lip, the angle, the height, etc. of the spiral rib in the present invention are not limited to those in the above embodiment, and may be changed as necessary.
以上の説明で明らかなように、本考案によれば、水溶液
を封止する第１のシールリップに付設したスパイラルリ
ブ付きの副リップにより、軸が回転すると水溶液を水溶
液側へ押し戻し、副リップと第１のシールリップ間の空
間が軸へ押圧され、軸の偏心追従性が格段に改善される
とともに水溶液の第１のシールリップへの侵入を防止す
る。また、第２のシールリップの油面角αをシール角β
より小さくする（逆オフセット）ことにより油を第１の
シールリップ方向へ極微量侵入させ、第１のシールリッ
プの潤滑不足を解消し、第１のシールリップの耐久性を
格段に向上させるという優れた効果を奏するものであ
る。As is clear from the above description, according to the present invention, the auxiliary lip with the spiral rib attached to the first sealing lip for sealing the aqueous solution pushes the aqueous solution back to the aqueous solution side when the shaft rotates, The space between the first seal lips is pressed against the shaft, the eccentricity followability of the shaft is remarkably improved, and the invasion of the aqueous solution into the first seal lips is prevented. In addition, the oil surface angle α of the second seal lip is set to the seal angle β
By making it smaller (reverse offset), a very small amount of oil penetrates in the direction of the first seal lip, the lack of lubrication of the first seal lip is resolved, and the durability of the first seal lip is significantly improved. It has a great effect.
第１図は本考案によるオイルシールの縦半断面図、第２
図は従来技術によるオイルシールの縦半断面図である。 １…ゴム様弾性体、２…金属製補強環 ３…スプリング、４…軸 ５…ハウジング、６…第１のシールリップ ７…第２のシールリップ ８…（第１のシールリップの）リップ先端 ９…空間 10…副リップ 11…（副リップの）リップ先端 12…斜面、13…スパイラルリブ 14…（第２のシールリップの）リップ先端 15…（第２のシールリップの油側）斜面 16…（第２のシールリップの反油側）斜面 Ａ…水溶液、Ｂ…油 Ｃ…（スプリングの）中心線 α…油面角、β…シール角FIG. 1 is a vertical half sectional view of an oil seal according to the present invention, and FIG.
The drawing is a vertical half-sectional view of an oil seal according to the prior art. DESCRIPTION OF SYMBOLS 1 ... Rubber-like elastic body, 2 ... Metal reinforcement ring 3 ... Spring, 4 ... Shaft 5 ... Housing, 6 ... 1st seal lip 7 ... 2nd seal lip 8 ... Lip tip (of 1st seal lip) 9 ... Space 10 ... Secondary lip 11 ... (Secondary lip) Lip tip 12 ... Slope, 13 ... Spiral rib 14 ... (Second seal lip) Lip tip 15 ... (Second seal lip oil side) Slope 16 … (Anti-oil side of the second seal lip) Slope A ... Aqueous solution, B ... Oil C ... (Spring) center line α ... Oil surface angle, β ... Seal angle
Claims (1)
するダブルリップ型のオイルシールにおいて、 水溶液（Ａ）を封止する第１のシールリップ（６）と油
（Ｂ）を封止する第２のシールリップ（７）を形成し、
前記第１のシールリップ（６）に、第１のシールリップ
（６）と一体的で水溶液Ａ側に突出した副リップ（10）
を付設するとともに、副リップ（10）の第１のシールリ
ップ（６）側斜面（12）に水溶液Ａを押し戻す方向のス
パイラルリブ（13）を設け、油Ｂを封止する第２のシー
ルリップ（７）を押圧するスプリング（３）の中心線
（Ｃ）をリップ先端（14）より油（Ｂ）側へずらし、第
２のシールリップ（７）と軸（４）とで成す斜面（15、
16）のうち、油（Ｂ）側の斜面（15）と軸（４）とが成
す油面角（α）を反対の斜面（16）と軸（４）とが成す
シール角（β）より小さくしたことを特徴とするオイル
シール。1. A double-lip type oil seal for separating and sealing two liquids, an aqueous solution (A) and an oil (B), wherein a first seal lip (6) and an oil (B) for sealing the aqueous solution (A). ) Forming a second sealing lip (7),
A sub-lip (10) which is integral with the first seal lip (6) and protrudes toward the aqueous solution A side of the first seal lip (6).
And a spiral rib (13) for pushing back the aqueous solution A on the slope (12) on the first seal lip (6) side of the sub lip (10) to seal the oil B. The center line (C) of the spring (3) that presses (7) is displaced toward the oil (B) side from the lip tip (14), and the slope (15) formed by the second seal lip (7) and the shaft (4). ,
16), the oil surface angle (α) formed by the oil (B) side slope (15) and the shaft (4) is calculated from the seal angle (β) formed by the opposite slope (16) and the shaft (4). An oil seal characterized by being made smaller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989018632U JPH071552Y2 (en) | 1989-02-20 | 1989-02-20 | Oil seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989018632U JPH071552Y2 (en) | 1989-02-20 | 1989-02-20 | Oil seal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02109076U JPH02109076U (en) | 1990-08-30 |
| JPH071552Y2 true JPH071552Y2 (en) | 1995-01-18 |
Family
ID=31233451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989018632U Expired - Lifetime JPH071552Y2 (en) | 1989-02-20 | 1989-02-20 | Oil seal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH071552Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998002681A1 (en) * | 1996-07-17 | 1998-01-22 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Shaft sealing structure for a compressor |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3984432B2 (en) * | 2001-04-11 | 2007-10-03 | 株式会社荒井製作所 | Sealing device for water pump |
| WO2005028929A1 (en) * | 2003-09-19 | 2005-03-31 | Nok Corporation | Sealing device |
| JP2012087892A (en) * | 2010-10-20 | 2012-05-10 | Advics Co Ltd | Liquid seal, shaft seal apparatus and pump apparatus using the same |
| JP6063326B2 (en) * | 2013-03-29 | 2017-01-18 | キーパー株式会社 | Oil seal |
| JP6775295B2 (en) * | 2015-11-12 | 2020-10-28 | 光洋シーリングテクノ株式会社 | Sealing device for differential side |
-
1989
- 1989-02-20 JP JP1989018632U patent/JPH071552Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998002681A1 (en) * | 1996-07-17 | 1998-01-22 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Shaft sealing structure for a compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02109076U (en) | 1990-08-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |