JPH0446128Y2 - - Google Patents
Info
- Publication number
- JPH0446128Y2 JPH0446128Y2 JP1984162295U JP16229584U JPH0446128Y2 JP H0446128 Y2 JPH0446128 Y2 JP H0446128Y2 JP 1984162295 U JP1984162295 U JP 1984162295U JP 16229584 U JP16229584 U JP 16229584U JP H0446128 Y2 JPH0446128 Y2 JP H0446128Y2
- Authority
- JP
- Japan
- Prior art keywords
- sealing performance
- sealed
- liquid
- screw
- seal lip
- 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
- 230000002457 bidirectional effect Effects 0.000 claims description 9
- 238000007789 sealing Methods 0.000 description 16
- 239000007788 liquid Substances 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 1
- 238000007733 ion plating Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000004381 surface treatment Methods 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、軸封技術に係るオイルシールの改良
に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of an oil seal related to shaft sealing technology.
従来から、オイルシールの一種として、特開昭
57−9360号公報に示されるように、シールリツプ
の大気側周面に高さほぼ数ミクロンないし数＋ミ
クロンの多数の微細な凹凸をランダムに設けて密
封性を高めるようにしたものが知られている。
Traditionally, as a type of oil seal,
As shown in Japanese Patent No. 57-9360, a seal lip is known in which a large number of fine irregularities of approximately several microns to several + microns in height are randomly provided on the circumferential surface of the seal lip on the atmospheric side to improve sealing performance. There is.
オイルシールのシールリツプは、種々の弾性材
料のなかから温度や被密封液の種類などの雰囲気
条件に合わせて最も適切なものが選択使用される
が、材料の種類によつて表面の肌理（きめ）に差
異があるため、摺動面の肌理が細かいものは密封
性に劣り、肌理が適度に粗いものは密封性に優れ
るというように材料の種類によつて密封性能にば
らつきがある。
The seal lip of an oil seal is selected from among various elastic materials according to the atmospheric conditions such as temperature and the type of liquid to be sealed, but the surface texture varies depending on the type of material. As a result, there are variations in sealing performance depending on the type of material, such as those with a fine texture on the sliding surface have poor sealing performance, and those with moderately coarse texture have excellent sealing performance.
上記従来技術は、雰囲気条件にしたがつてシー
ルリツプに表面の肌理が細かい材料を使用せざる
を得ない場合に密封性を補填する上で有効な手段
であるが、その構造から、下記するような改良の
余地がある。 The above conventional technology is an effective means for compensating for sealing performance when a material with a fine surface texture must be used for the seal lip due to atmospheric conditions, but due to its structure, the following There is room for improvement.
すなわち、多数の微細な凹凸をランダム（「で
たらめ」「手当たり次第」の意、三省堂刊「新コ
ンサイス英和辞典」より）に設ける構造であるこ
とから、設計に際して凹凸に対して方向性を考慮
に加えることができず、設計の自由度が狭い。す
なわち密封性に関する他の設計要素（凹凸の大き
さ、数など）によつて定められる密封性に、更に
方向性の要素を加えれば得られる微妙な調整を付
加することができず、故に密封性の調整に一定の
限界を有している。密封性を微妙な範囲に亙つて
調整することは、今一つオイルシールに求められ
る潤滑性との兼ね合いから極めて重要である。 In other words, since it is a structure in which a large number of minute irregularities are created randomly (meaning "randomly" or "at random", from Sanseido's "New Concise English-Japanese Dictionary"), the directionality of the irregularities must be taken into account when designing. Therefore, the degree of freedom in design is limited. In other words, it is not possible to add the subtle adjustments that can be made by adding directional elements to the sealability determined by other design elements related to sealability (size, number, etc. of unevenness), and therefore the sealability There are certain limits to the adjustment of Adjusting the sealing performance over a delicate range is extremely important in view of the lubricity required of the oil seal.
本考案は以上の点に鑑み、上記従来技術に方向
性の要素を加え、密封性について微妙な調整を可
能としたオイルシールを提供することを目的とす
る。 In view of the above points, it is an object of the present invention to add a directional element to the above-mentioned conventional technology, and to provide an oil seal that allows delicate adjustment of sealing performance.
上記目的を達成するため、本考案のオイルシー
ルは、シールリツプの大気側周面に、所定のネジ
角度を有する両方向ネジを形成することとした。
In order to achieve the above object, the oil seal of the present invention has a bidirectional thread having a predetermined thread angle formed on the circumferential surface of the seal lip on the atmosphere side.
ネジには方向性があり、よつて本考案によれば
密封性についての調整にこの方向性の要素を加え
ることができる。また本考案はこのネジを特に両
方向のものとしたため、摺動面に被密封液を引き
入れる側のネジと摺動面から被密封液を排除する
側のネジの双方についてそれぞれ微妙な調整が可
能である。
Screws have a directional property, and therefore, according to the present invention, this directional element can be added to the adjustment of the sealing performance. In addition, this invention has specifically designed this screw to be bidirectional, so that it is possible to make fine adjustments to both the screw on the side that draws the sealed liquid into the sliding surface and the screw on the side that removes the sealed liquid from the sliding surface. be.
つぎに本考案の実施例を図面にしたがつて説明
する。
Next, embodiments of the present invention will be described with reference to the drawings.
図において、１は金属製の支持環、２は一端を
支持環１に焼着されたニトリルゴム製のシールリ
ツプ、３はガータスプリングであつて、前記シー
ルリツプ２の大気側周面４に、両方向ネジ５，
５′が形成されている。ニトリルゴムは耐熱性に
優れるが、表面の肌理が細か過ぎるものである。
両方向ネジ５，５′の仕様は次のとおりである。 In the figure, 1 is a metal support ring, 2 is a seal lip made of nitrile rubber whose one end is sintered to the support ring 1, and 3 is a garter spring. 5,
5' is formed. Nitrile rubber has excellent heat resistance, but its surface texture is too fine.
The specifications of the bidirectional screws 5, 5' are as follows.
ネジ山高さｈ＝12μm
ネジ山角度θ1＝90°
直角ピツチｐ＝60μm
ネジ角度θ2＝30°
ユニツト数＝24本
相手軸径＝85mm
回転数＝０〜500rpm
上記構成を備えるオイルシールは、両方向ネジ
５，５′を形成したことにより摺動面上に支配的
な流体力学的流れが生じ、材料の表面の肌理が細
か過ぎて材料自体の密封能力がそれほど大きくな
くても密封性を補填することができるものであつ
て、両方向ネジ５，５′の仕様を変更することに
より密封性を調整し、特に、仕様のひとつにネジ
の方向性（前記ネジ角度θ2）を加えたため上記従
来技術と比較して密封性を一段と微妙に調整する
ことができ、例えば、被密封液の粘性が小さい場
合には前記ネジ角度θ2を小さくし、被密封液の粘
性が大きい場合には前記ネジ角度θ2を大きくする
などして密封性を最適な状態に設定することがで
きる。 Thread height h = 12 μm Thread angle θ 1 = 90° Right angle pitch p = 60 μm Thread angle θ 2 = 30° Number of units = 24 Mating shaft diameter = 85 mm Rotational speed = 0 to 500 rpm The oil seal with the above configuration is as follows: By forming the bidirectional threads 5 and 5', a dominant hydrodynamic flow is generated on the sliding surface, which compensates for the sealing performance even if the material surface texture is too fine and the sealing ability of the material itself is not very large. The sealing performance is adjusted by changing the specifications of the bidirectional screws 5 and 5', and in particular, the directionality of the screw (the screw angle θ 2 ) is added to one of the specifications. Compared to conventional technology, the sealing performance can be adjusted more delicately, for example, when the viscosity of the liquid to be sealed is low, the screw angle θ 2 is made small, and when the viscosity of the liquid to be sealed is high, the screw angle θ 2 is reduced. The sealing performance can be set to the optimum state by increasing the angle θ 2 or the like.
またネジを特に両方向のものとしたため。摺動
面に被密封液を引き入れる側のネジ５と摺動面か
ら被密封液を排除する側のネジ５′の双方につい
てそれぞれ微妙な調整が可能である。 Also, the screws were designed to be bidirectional. Subtle adjustments can be made for both the screw 5 on the side that draws the liquid to be sealed into the sliding surface and the screw 5' on the side that removes the liquid to be sealed from the sliding surface.
また、この被密封液の流れに関連して摺動面に
被密封液を引き入れる側のネジ５と摺動面から被
密封液を排除する側のネジ５′が円周方向に交互
に配置されているため摺動面に介在する被密封液
が絶えず入れ替わり、これに伴つて、摺動熱を除
去することが可能である。 Further, in relation to the flow of the sealed liquid, screws 5 on the side that draw the liquid to be sealed into the sliding surface and screws 5' on the side that remove the liquid to be sealed from the sliding surface are arranged alternately in the circumferential direction. Because of this, the sealed liquid present on the sliding surface is constantly replaced, and along with this, it is possible to remove the heat of sliding.
なお、摺動に伴つてネジ５，５′が摩耗するの
を抑えるため、成形時、高周波スパツタリングま
たはイオンプレーテイングなどによる表面処理を
実施しておくと良い。 In order to prevent the screws 5, 5' from being worn out due to sliding, it is preferable to perform surface treatment by high frequency sputtering, ion plating, etc. during molding.
本考案のオイルシールは以上説明したようにシ
ールリツプの大気側周面に所定のネジ角度を有す
る両方向ネジを形成することとして密封性の調整
にネジの方向性の要素を加えたもので、密封性に
ついて従来技術より微妙な調整が可能となり、雰
囲気条件に対して最適な優れた密封性能を得るこ
とができる。
As explained above, the oil seal of the present invention has a bidirectional thread with a predetermined thread angle formed on the circumferential surface of the seal lip on the atmosphere side, so that the element of thread direction is added to the adjustment of sealing performance. It is possible to make more delicate adjustments than with conventional technology, and it is possible to obtain excellent sealing performance that is optimal for the atmospheric conditions.
第１図は本考案の実施例に係るオイルシールの
断面図、第２図はシールリツプの一部拡大平面
図、第３図はシールリツプの一部拡大断面図であ
る。
１……支持環、２……シールリツプ、３……ガ
ータスプリング、４……大気側周面、５，５′…
…両方向ネジ。
FIG. 1 is a sectional view of an oil seal according to an embodiment of the present invention, FIG. 2 is a partially enlarged plan view of the seal lip, and FIG. 3 is a partially enlarged sectional view of the seal lip. 1... Support ring, 2... Seal lip, 3... Garter spring, 4... Atmospheric side circumferential surface, 5, 5'...
...bidirectional screw.
Claims (1)
角度θ2を有する両方向ネジ５，５′を形成したこ
とを特徴とするオイルシール。 An oil seal characterized in that bidirectional threads 5, 5' having a predetermined thread angle θ 2 are formed on the atmosphere side circumferential surface 4 of the seal lip 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984162295U JPH0446128Y2 (en) | 1984-10-29 | 1984-10-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984162295U JPH0446128Y2 (en) | 1984-10-29 | 1984-10-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6177473U JPS6177473U (en) | 1986-05-24 |
| JPH0446128Y2 true JPH0446128Y2 (en) | 1992-10-29 |
Family
ID=30720182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984162295U Expired JPH0446128Y2 (en) | 1984-10-29 | 1984-10-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0446128Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9220737B2 (en) | 2003-04-27 | 2015-12-29 | Protalix Ltd. | Plant cell culture expressing human lysosomal proteins and uses thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS579360A (en) * | 1980-06-18 | 1982-01-18 | Akira Washida | Oilseal |
-
1984
- 1984-10-29 JP JP1984162295U patent/JPH0446128Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS579360A (en) * | 1980-06-18 | 1982-01-18 | Akira Washida | Oilseal |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9220737B2 (en) | 2003-04-27 | 2015-12-29 | Protalix Ltd. | Plant cell culture expressing human lysosomal proteins and uses thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6177473U (en) | 1986-05-24 |
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