CN2388421Y - Dynamic rotation axis grease seal with two-way oil return line - Google Patents
Dynamic rotation axis grease seal with two-way oil return line Download PDFInfo
- Publication number
- CN2388421Y CN2388421Y CN98236241U CN98236241U CN2388421Y CN 2388421 Y CN2388421 Y CN 2388421Y CN 98236241 U CN98236241 U CN 98236241U CN 98236241 U CN98236241 U CN 98236241U CN 2388421 Y CN2388421 Y CN 2388421Y
- Authority
- CN
- China
- Prior art keywords
- oil
- drive back
- sealing
- back thread
- oil return
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- Expired - Fee Related
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Abstract
The utility model relates to a dynamic rotating axis oil seal with bidirectional oil return lines, which is composed of a frame 1, rubber 2, a spring 3, a sealing lip 4, and oil return lines 5 which form a shape like the Chinese character ba and are uniformly distributed on the circumference of the sealing lip 4 and are formed by moulding. The cross section of the oil return line 5 forms a triangle shape or a quadrangle shape. The utility model is suitable for one-way operating sealing system, a bidirectional operating sealing system, and a sealing system, wherein, the oil seal of the sealing system is correspondingly installed and a shaft of the sealing system operates toward a same direction.
Description
A kind of dynamic rotary shaft oil seal with two-way oil drive back thread mainly is the Sealing that is used to seal running shaft.
In the prior art, to running shaft is the sealing system that only needs an oil sealing of unidirectional running, the oil sealing that adopts has two kinds, a kind of is the oil sealing that does not have oil drive back thread, another kind is the oil sealing with unidirectional oil drive back thread, does not have the oil sealing of oil drive back thread can not guarantee sealability, has destroyed the oil film of lubricated lip because of pumping effect with the oil sealing of unidirectional oil drive back thread, the wearing and tearing that this has just accelerated lip, the working life of having reduced oil sealing.
To running shaft is the sealing system that bidirectional movement only needs an oil sealing, and the oil sealing that is adopted has the oil drive back thread of multiple mode, as waveform, " DP " groove, triangle convexo-concave block, netted and bidirectional jet delivery type oil drive back thread etc.The waveform oil drive back thread is that the section of ripple is a rectangle at sine wave of oil sealing sealing lip place's mold pressing; " DP " groove oil drive back thread is to go out arcuate furrow in the place's mold pressing of oil sealing sealing lip, and end face is a rectangle, and the groove end is on procheilon; Triangle convexo-concave block and half arc bump all near the sealing lip procheilon mold pressing form, the oil sealing of above-mentioned band oil drive back thread all is to utilize oil film and pump efficiency to answer principle, leak easily when running up, sealing reliability was poor when beam warp Chang Fanfu alternately rotated, and required the machining accuracy height.The Chinese patent ZL94 1 05084.X invention and created name that retrieves is a bidirectional jet delivery type rotary shaft oil seal, what adopt is that the impelling transfer principle is to reach the oil sealing purpose, it is by skeleton, rubber, spring and be located at the compositions such as sealing lip of oil sealing waist, the mode of its oil drive back thread is to have several sections to be protruding triangle in the mold pressing of sealing lip place, and internal diameter is the annular triangle strip that ladder-type increases progressively, the band be with parallel to each other, the problem that this kind structure exists is: if its following summit and sealing surface procheilon join, then after oil sealing is installed on the axle, the lip of oil drive back thread meeting part jack-up both sides, make lip partly leave the axle surface, thereby will cause static leak fuel, if but oil drive back thread do not link to each other with procheilon, then and oil drive back thread between have the gap, will cause dynamic oil return weak effect, even leakage of oil.
Running shaft is unidirectional running and needs two sealing systems that oil sealing is installed (as vehicle bridge two ends semiaxis) relatively present employed oil sealing does not all have oil drive back thread, its sealability is difficult to guarantee.
The purpose of this utility model is: a kind of dynamic rotary shaft oil seal that seals the two-way oil drive back thread of reliable long service life band is provided, and it is suitable for above-mentioned three kinds of oil sealings that sealing system is used.
What the purpose of this utility model was achieved in that the dynamic rotary shaft oil seal with two-way oil drive back thread adopts is that oil film and pump efficiency answer principle to reach the oil sealing purpose, it is made up of skeleton 1, rubber 2, spring 3, sealing lip 4, "/" type that is furnished with evenly on week in the garden of sealing lip 4 that mold pressing goes out or " * ", " /// " type oil drive back thread 5, its oil drive back thread 5 sections are trigonometric form or quadrilateral.
Optimum efficiency of the present utility model: 1, owing to adopt the special construction of oil drive back thread, this oil sealing is applicable to the sealing of the running shaft of unidirectional or bidirectional movement; 2, owing in one group of oil drive back thread, place leakage of oil is always arranged, and oil pump is sucked back oily side at another place, make the balance that can reach oil between oil drive back thread and the lip all the time, just there is a kind of oil film of transient equiliblium to exist on the seal lip all the time, thereby lip is lubricated admirably, reduce temperature, reduce wear, prevent the generation of charing phenomenon, thereby prolong the working life of oil sealing.
The description of the drawings:
Fig. 1, Fig. 5, Fig. 6 are the expansion cross-sectional schematic of three kinds of different structures of the utility model.
The expansion schematic representation of Fig. 2, Fig. 3 oil drive back thread 5 when to be the utility model with transparent axle match.
Fig. 4 is the fundamental diagram of oil drive back thread 5.
Fig. 7 is the structure cross-sectional schematic of the utility model when cooperating with running shaft.
The utility model is described in further detail below in conjunction with accompanying drawing: the dynamic rotary shaft oil seal with two-way oil drive back thread is made up of skeleton 1, rubber 2, spring 3, sealing lip 4, on the side face of the garden of sealing lip 4, evenly be furnished with the oil drive back thread 5 that mold pressing goes out, the form of oil drive back thread 5 has "/", " /// ", " * ", the triangular in shape or quadrilateral of its oil drive back thread 5 sections.Match with the running shaft angle α (referring to Fig. 7) of part of oil drive back thread 5 decide with the structure of product, to guarantee that oil drive back thread and lip contact with axle together and can be with lip jack-up.
Most preferred embodiment of the present utility model is referring to Fig. 1: the dynamic rotary shaft oil seal with two-way oil drive back thread is made up of skeleton 1, rubber 2, spring 3, sealing lip 4, on the side face of the garden of sealing lip 4, evenly be furnished with the oil drive back thread 5 that mold pressing goes out, the form of oil drive back thread 5 also has " /// ", " * " as Fig. 5, Fig. 6, the triangular in shape or quadrilateral of the section of oil drive back thread 5.When the running shaft made from transparent material cooperated with this oil sealing, the oil drive back thread 5 and the lip that can be observed triangular section or quadrilateral section cooperated form such as Fig. 2, shown in Figure 3 together with transparent running shaft.
The working principle of oil drive back thread 5 is known from Fig. 4: after oil sealing is installed, just have one deck oil film between oil seal lip and the running shaft, when running shaft turns round in the direction of the clock, oil film is destroyed with the A place that touches of being coupling at oil drive back thread, oil will gush, and along with the rotation of axle moves to the B place, because the pump-absorb action at B place, oil spill is sucked back oily side by pump again, thereby reaches the effect of oil sealing.When running shaft was rotated counterclockwise, the effect at A place and B place was just in time opposite, spilt the oil that comes at the B place and can be sucked back oily side by pump at the A place again.So no matter running shaft is towards which direction running, promptly unidirectional or two-way, this oil sealing can both play sealing effect.
Claims (2)
1. dynamic rotary shaft oil seal of forming by skeleton 1, rubber 2, spring 3, sealing lip 4 with two-way oil drive back thread, it is characterized in that: evenly be furnished with on week in the garden of sealing lip 4 ＂ that mold pressing goes out/＂ type oil drive back thread 5, the triangular in shape or quadrilateral of its oil drive back thread 5 sections.
2. according to the described dynamic rotary shaft oil seal of claim 1, it is characterized in that with two-way oil drive back thread: the ＂ on the described sealing lip 4/＂ type oil drive back thread 5 can also be molded into ＂ * ＂ type shape, perhaps ＂ /// " many overlapping type shapes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98236241U CN2388421Y (en) | 1998-08-14 | 1998-08-14 | Dynamic rotation axis grease seal with two-way oil return line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98236241U CN2388421Y (en) | 1998-08-14 | 1998-08-14 | Dynamic rotation axis grease seal with two-way oil return line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2388421Y true CN2388421Y (en) | 2000-07-19 |
Family
ID=33984340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98236241U Expired - Fee Related CN2388421Y (en) | 1998-08-14 | 1998-08-14 | Dynamic rotation axis grease seal with two-way oil return line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2388421Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1311177C (en) * | 2002-02-28 | 2007-04-18 | Nok株式会社 | Sealing device |
| CN100436896C (en) * | 2003-12-09 | 2008-11-26 | Nok株式会社 | Sealing device |
| CN104214346A (en) * | 2013-04-18 | 2014-12-17 | Skf公司 | Sealing assembly |
| CN104728449A (en) * | 2015-03-26 | 2015-06-24 | 山东东都新材料科技有限公司 | Chinese-doughnut-shaped oil-back line oil seal |
| US10228059B2 (en) * | 2013-10-10 | 2019-03-12 | Nok Corporation | Sealing device |
| CN112303236A (en) * | 2020-11-05 | 2021-02-02 | 嘉科（无锡）密封技术有限公司 | Bidirectional rotary sealing high-rotating-speed oil seal |
| CN114033852A (en) * | 2021-10-12 | 2022-02-11 | 莱阳市昌誉密封科技股份有限公司 | Bidirectional high-speed motor oil seal |
-
1998
- 1998-08-14 CN CN98236241U patent/CN2388421Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1311177C (en) * | 2002-02-28 | 2007-04-18 | Nok株式会社 | Sealing device |
| CN100436896C (en) * | 2003-12-09 | 2008-11-26 | Nok株式会社 | Sealing device |
| CN104214346A (en) * | 2013-04-18 | 2014-12-17 | Skf公司 | Sealing assembly |
| US9709173B2 (en) | 2013-04-18 | 2017-07-18 | Aktiebolaget Skf | Sealing assembly |
| CN104214346B (en) * | 2013-04-18 | 2018-04-17 | Skf公司 | Sealing device |
| US10228059B2 (en) * | 2013-10-10 | 2019-03-12 | Nok Corporation | Sealing device |
| CN104728449A (en) * | 2015-03-26 | 2015-06-24 | 山东东都新材料科技有限公司 | Chinese-doughnut-shaped oil-back line oil seal |
| CN112303236A (en) * | 2020-11-05 | 2021-02-02 | 嘉科（无锡）密封技术有限公司 | Bidirectional rotary sealing high-rotating-speed oil seal |
| CN114033852A (en) * | 2021-10-12 | 2022-02-11 | 莱阳市昌誉密封科技股份有限公司 | Bidirectional high-speed motor oil seal |
| CN114033852B (en) * | 2021-10-12 | 2023-08-29 | 莱阳市昌誉密封科技股份有限公司 | Bidirectional high-speed motor oil seal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |