JPH021577Y2 - - Google Patents
Info
- Publication number
- JPH021577Y2 JPH021577Y2 JP1985032063U JP3206385U JPH021577Y2 JP H021577 Y2 JPH021577 Y2 JP H021577Y2 JP 1985032063 U JP1985032063 U JP 1985032063U JP 3206385 U JP3206385 U JP 3206385U JP H021577 Y2 JPH021577 Y2 JP H021577Y2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- side lip
- gas
- lip
- chamber
- 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
- 238000009423 ventilation Methods 0.000 claims 1
- 239000000428 dust Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 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）
本考案に係るオイルシールは、相対的に回転運
動する２部材間に配置され、油の漏出防止のため
に使用されるものである。[Detailed Description of the Invention] (Industrial Application Field) The oil seal according to the present invention is arranged between two members that rotate relative to each other, and is used to prevent oil leakage.
（従来の技術）
従来、第３図に示すようなオイルシールは、油
室Ｂ側から気体室Ａ側への油の漏出を防止し、気
体室Ａ側から油室Ｂ側へのダスト等の侵入を防止
するために用いられている。従つて、気体側リツ
プ２には、軸８との摺動接触部へ侵入してきたダ
スト等を気体室Ａ側へ押し戻す機能を持たせてお
り、油側リツプ３には、軸８との摺動接触部へ侵
入してきた油を油室Ｂ側へ押し戻す機能を持たせ
ている。そのため、使用中に、気体側リツプ２と
油側リツプ３の間の空間４内の空気が気体室Ａ及
び油室Ｂ側へ押し出される現象を生じて、空間４
内の空気圧力が低下し、気体側リツプ２と油側リ
ツプ３が軸８に強く圧接されてリツプ摩耗が促進
されるとともに、密封機能を著しく低下させると
いう問題点があつた。(Prior Art) Conventionally, an oil seal as shown in Fig. 3 prevents oil from leaking from the oil chamber B side to the gas chamber A side, and prevents dust etc. from leaking from the gas chamber A side to the oil chamber B side. It is used to prevent intrusion. Therefore, the gas side lip 2 has the function of pushing back the dust etc. that have entered the sliding contact part with the shaft 8 to the gas chamber A side, and the oil side lip 3 has the function of pushing back the dust etc. that have entered the sliding contact part with the shaft 8. It has the function of pushing oil that has entered the dynamic contact area back to the oil chamber B side. Therefore, during use, a phenomenon occurs in which the air in the space 4 between the gas side lip 2 and the oil side lip 3 is pushed out toward the gas chamber A and oil chamber B, and the space 4
There was a problem in that the air pressure inside decreased, and the gas side lip 2 and oil side lip 3 were strongly pressed against the shaft 8, accelerating lip wear and significantly reducing the sealing function.
この問題点を解決するため第４図に示す如く、
気体側リツプ２と油側リツプ３の間に形成される
空間４と気体室Ａとを連通させる通気孔５を設け
ることにより、気体側リツプ２と油側リツプ３の
間の負圧発生を防止するオイルシールが考案され
た。 In order to solve this problem, as shown in Figure 4,
By providing a vent hole 5 that communicates the space 4 formed between the gas side lip 2 and the oil side lip 3 with the gas chamber A, generation of negative pressure between the gas side lip 2 and the oil side lip 3 is prevented. An oil seal was devised to do so.
（考案が解決しようとする問題点）
しかし、このオイルシールが通気孔５から気体
以外に油の飛沫が混入するような状態下で使用さ
れる場合は、通気孔５から侵入した油が気体側リ
ツプ２と油側リツプ３の間の空間４に溜り、一部
は気体側リツプ２と軸８の間から気体室Ａへ還流
されるが、残りの油は、油側リツプ３と軸８の間
から油室Ｂ側へ送り出され、別の油に混入してし
まうという問題点を有していた。通常、オイルシ
ールで隔てられる油は異質の油が使用されること
が多いため、異質の油の混入を僅少とし、油の特
性変化を極力防止する必要がある。(Problem to be solved by the invention) However, when this oil seal is used in a condition where oil droplets are mixed in with gas from the vent hole 5, the oil that has entered from the vent hole 5 may enter the gas side. The oil accumulates in the space 4 between the lip 2 and the oil side lip 3, and some of the oil is returned to the gas chamber A from between the gas side lip 2 and the shaft 8, but the remaining oil remains between the oil side lip 3 and the shaft 8. There was a problem in that the oil was sent out from the gap to the oil chamber B side and mixed with other oil. Normally, different types of oil are often used as the oil separated by oil seals, so it is necessary to minimize the amount of different types of oil mixed in and to prevent changes in oil properties as much as possible.
（問題点を解決するための手段）
本考案は、上記問題点を解決するため、以下の
構成を有する。(Means for Solving the Problems) In order to solve the above problems, the present invention has the following configuration.
すなわち、本考案のオイルシールは、環状本体
の径方向内端に二又に分離した気体側リツプと油
側リツプを備え、前記気体側リツプと油側リツプ
の間に形成される空間と気体室を連通する通気孔
を有するオイルシールにおいて、前記環状本体の
径方向内端の前記通気孔開口端の油室側から前記
気体側リツプへ向つて伸びる樋を設け、該樋に対
峙する気体側リツプの内周面に螺旋溝を形成した
ことを特徴とするものである。 That is, the oil seal of the present invention has a gas side lip and an oil side lip separated into two at the radially inner end of the annular body, and a space and a gas chamber formed between the gas side lip and the oil side lip. In the oil seal having a vent hole communicating with the oil seal, there is provided a gutter extending from the oil chamber side of the opening end of the vent hole at the radially inner end of the annular body toward the gas side lip, and the gas side lip facing the gutter. It is characterized by having a spiral groove formed on the inner peripheral surface.
（作用）
通気孔５から侵入した油は、樋６によつて螺旋
溝７の形成された気体側リツプ２近傍へ強制的に
導びかれるため、大部分が螺旋溝７のポンプ作用
により気体室Ａ側へ還流され、極少量の油が気体
とともに油室Ｂへ滲み出る。(Function) Since the oil that entered through the vent hole 5 is forcibly guided by the gutter 6 to the vicinity of the gas side lip 2 where the spiral groove 7 is formed, most of the oil enters the gas chamber by the pumping action of the spiral groove 7. It is refluxed to the A side, and a very small amount of oil seeps into the oil chamber B along with the gas.
（実施例）
本考案のオイルシールは、第１図に示す如く、
内部に金属補強環９を有する環状本体１の径方向
内端に二又に分離した気体側リツプ２と油側リツ
プ３が形成され、気体側リツプ２と油側リツプ３
の外周に、密封圧力を生じさせるためのスプリン
グ１０が設置されている。気体側リツプ２と油側
リツプ３の間には空間４が形成されており、該空
間４と気体室Ａ側とを連通する通気孔５が環状本
体１に設けられている。環状本体１の径方向内端
には、通気孔５の開口端の油室Ｂ側から気体側リ
ツプ２の近傍へ向つて伸びる還状の樋６が設けら
れており、該樋６に対峙する気体側リツプ２の内
周面には螺旋溝７が形成されている。螺旋溝７
は、軸８が回転した場合、空間４側から気体室Ａ
側へ油を送り出す様に形成されている。樋６は、
気体側リツプ２及び軸８との間に隙間を生じる如
く形成されている。(Example) As shown in FIG. 1, the oil seal of the present invention has the following features:
A gas side lip 2 and an oil side lip 3 separated into two are formed at the radially inner end of an annular body 1 having a metal reinforcing ring 9 inside.
A spring 10 is installed around the outer periphery of the spring 10 to generate a sealing pressure. A space 4 is formed between the gas side lip 2 and the oil side lip 3, and a vent hole 5 is provided in the annular body 1 to communicate the space 4 with the gas chamber A side. A circular gutter 6 is provided at the radially inner end of the annular body 1 and extends from the oil chamber B side of the open end of the vent hole 5 toward the vicinity of the gas side lip 2, and is opposed to the gutter 6. A spiral groove 7 is formed on the inner peripheral surface of the gas side lip 2. spiral groove 7
When the shaft 8 rotates, the gas chamber A is opened from the space 4 side.
It is designed to send oil to the side. Gutter 6 is
It is formed so as to create a gap between the gas side lip 2 and the shaft 8.
第２図は、本考案の他の実施例を示すものであ
り、通気孔５の形状を除き、第１図のオイルシー
ルと実質的に相違する点はない。尚、実施例では
気体側リツプ２のみに螺旋溝７を形成したが、油
側リツプ３にも螺旋溝を形成することが考えられ
る。油側リツプ３に螺旋溝を形成する場合は、気
体側リツプ２に形成された螺旋溝７を考慮して溝
形状が決定される。 FIG. 2 shows another embodiment of the present invention, which is not substantially different from the oil seal shown in FIG. 1 except for the shape of the vent hole 5. In the embodiment, the spiral groove 7 was formed only on the gas side lip 2, but it is conceivable to form the spiral groove on the oil side lip 3 as well. When a spiral groove is formed in the oil side lip 3, the groove shape is determined in consideration of the spiral groove 7 formed in the gas side lip 2.
（考案の効果）
本考案は、通気孔から混入した油を樋によつて
螺旋溝が形成された気体側リツプの近傍へ導い
て、螺旋溝のポンプ作用で油の大部分を気体室側
へ還流させるため、油側へ滲み出す油の量を極め
て少なくすることができた。(Effects of the invention) This invention guides the oil mixed in from the vent hole to the vicinity of the gas side lip where a spiral groove is formed by the gutter, and uses the pumping action of the spiral groove to direct most of the oil to the gas chamber side. By refluxing the oil, we were able to extremely reduce the amount of oil seeping out to the oil side.
したがつて、油室内の油の特性を長期間に渡り
維持することができ、その実用的効果は極めて大
きい。 Therefore, the properties of the oil in the oil chamber can be maintained for a long period of time, and the practical effects thereof are extremely large.
第１図は本考案の実施例であるオイルシールの
半断面図、第２図は本考案の他の実施例であるオ
イルシールの半断面図、第３図乃至第４図は従来
のオイルシールの半断面図を示すものである。
１……環状本体、２……気体側リツプ、３……
油側リツプ、４……空間、５……通気孔、６……
樋、７……螺旋溝、８……軸、９……金属補強
環、１０……スプリング、Ａ……気体室、Ｂ……
油室。
FIG. 1 is a half-sectional view of an oil seal that is an embodiment of the present invention, FIG. 2 is a half-sectional view of an oil seal that is another embodiment of the present invention, and FIGS. 3 and 4 are conventional oil seals. This shows a half cross-sectional view of. 1...Annular body, 2...Gas side lip, 3...
Oil side lip, 4...Space, 5...Vent hole, 6...
Gutter, 7...Spiral groove, 8...Shaft, 9...Metal reinforcement ring, 10...Spring, A...Gas chamber, B...
Oil room.
Claims (1)
側リツプ３を備え、前記気体側リツプ２と油側リ
ツプ３の間に空間４が形成され、前記空間４と気
体室Ａを連通する通気孔５を備えるオイルシール
において、前記環状本体１の径方向内端の前記通
気孔５開口端の油室Ｂ側から前記気体側リツプ２
へ向つて伸びる樋６を設け、該樋６と対峙する気
体側リツプ２の内周面に螺旋溝７を形成したこと
を特徴とするオイルシール。 A gas side lip 2 and an oil side lip 3 are provided at the radially inner end of the annular body 1, and a space 4 is formed between the gas side lip 2 and the oil side lip 3, and the space 4 communicates with the gas chamber A. In an oil seal provided with a ventilation hole 5, the gas side lip 2
An oil seal characterized in that a gutter 6 extending toward the oil seal is provided, and a spiral groove 7 is formed on the inner circumferential surface of the gas side lip 2 facing the gutter 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985032063U JPH021577Y2 (en) | 1985-03-06 | 1985-03-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985032063U JPH021577Y2 (en) | 1985-03-06 | 1985-03-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61148963U JPS61148963U (en) | 1986-09-13 |
| JPH021577Y2 true JPH021577Y2 (en) | 1990-01-16 |
Family
ID=30533231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985032063U Expired JPH021577Y2 (en) | 1985-03-06 | 1985-03-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH021577Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5719255B2 (en) * | 2011-08-24 | 2015-05-13 | カヤバ工業株式会社 | Damper with air spring |
-
1985
- 1985-03-06 JP JP1985032063U patent/JPH021577Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61148963U (en) | 1986-09-13 |
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