CN104819298B - Oil sealing - Google Patents
Oil sealing Download PDFInfo
- Publication number
- CN104819298B CN104819298B CN201510056167.4A CN201510056167A CN104819298B CN 104819298 B CN104819298 B CN 104819298B CN 201510056167 A CN201510056167 A CN 201510056167A CN 104819298 B CN104819298 B CN 104819298B
- Authority
- CN
- China
- Prior art keywords
- axle
- towards
- oil sealing
- oily
- outer peripheral
- 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 - Fee Related
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 57
- 230000002093 peripheral effect Effects 0.000 claims abstract description 21
- 239000000428 dust Substances 0.000 claims abstract description 16
- 241000270295 Serpentes Species 0.000 claims abstract description 14
- 210000001015 abdomen Anatomy 0.000 claims abstract description 14
- 230000000694 effects Effects 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 229920002725 thermoplastic elastomer Polymers 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000008393 encapsulating agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
Abstract
The present invention provides one kind and is sealed between axle and axis hole, the oil sealing that atmospheric side and oily side are separated, and the oil sealing produces negative pressure even in oily side can also keep the contact with axle.The oil sealing has：Fixed part (20), it is fixed relative to the inner peripheral surface of axis hole (12)；Snake belly tube portion (24), it extends from fixed part (20) towards direction of principal axis and towards radially inner side；Cylindrical portion (26), it extends from the radially inner side end (25) of snake belly tube portion (24) to atmospheric side (A) vertically；Admedial sealing lip (30), it extends from atmospheric side (A) end (28) of cylindrical portion (26) towards radially inner side and towards oily side (O), is slidably adjacent to the outer peripheral face of the axle vertically；Dust excluder lips (32), it extends from atmospheric side (A) end (28) of cylindrical portion (26) towards atmospheric side (A) vertically.
Description
Technical field
The present invention relates to a kind of oil sealing being sealed between axle and axis hole.
Background technology
At present, the relatively low engine of internal pressure for crankcase, it is recommended to reduce the lip of resistance using by reduction friction
Shape is sealed.Here, the radial load of oil sealing, for fully keeping contact of the lip packing with axle, and is reduced sufficiently to friction
Bottom line.However, in the supercharged engine of turbine type or booster-type etc., by making crankcase internal pressure be formed as negative pressure, making lip
Sealing does not keep contacting with axle.Thus, cause from the air flow in the lateral crankcase of air.The air flow, passes through sealing
Interaction between lip, oil and axle, can produce noise (pitch very high noise) and make demander uncomfortable.Therefore, even if
Negative pressure is produced in oily side can also obtain keeping with axle contacting, the oil sealing of low friction.
Patent document 1：No. 8066287 publications of U.S. Patent No..
The content of the invention
It is an object of the invention to provide a kind of oil sealing, the oil sealing sealing between axle and axis hole, by atmospheric side and oily side every
Open, the contact with axle can also be kept by producing negative pressure even in oily side.
In order to solve above-mentioned problem, the present invention is in the following ways.
That is, oil sealing of the invention, it is sealed between axle and axis hole, and atmospheric side is separated with oily side, had：Fixed part,
It is fixed relative to the inner peripheral surface of the axis hole；Snake belly tube portion, it extends from the fixed part towards direction of principal axis and towards radially inner side；
Cylindrical portion, its radially inner side end vertically from the snake belly tube portion extends to the atmospheric side；Admedial sealing lip, its
Extend vertically from the air side of the cylindrical portion towards radially inner side and towards the oily side, slided with the outer peripheral face of the axle
It is dynamic to be freely adjacent to；Dust excluder lips, it extends from the air side of the cylindrical portion towards the atmospheric side vertically.
According to said structure, due to snake belly tube portion, two directions extend both axially and radially, so as to make snake belly tube portion to footpath
Inside lateral bend.Thus, when oily side produces negative pressure and effect makes sealing lip radially from the power that axle is lifted, snake belly tube portion is passed through
Shape, to cylinder act on cancelled out each other with the power, maintenance sealing lip and axle contact power.Thus, produced even in oily side
Raw negative pressure, can also keep contact of the oil sealing with axle.
Herein, preferably being produced in the oily side makes enough negative pressure that the outer peripheral face of the sealing lip from the axle is lifted
When, the air side of the cylindrical portion bends, so that the dust excluder lips are close to the outer peripheral face of the axle.
According to said structure, when producing negative pressure, dust excluder lips are made to be close to the outer peripheral face of axle, therefore, it is possible to seal by oil
The flowing of the air of the inner circumferential side of envelope.Oil sealing is, with sufficiently flexible structure, to be shaken with utilizing in the vacuum that oily side is produced,
Thus dust excluder lips are made to contact the flowing so as to seal gas with axle.In addition preferably, before sealing lip is lifted completely, prevent
Dirt lip is contacted with axle.
Additionally, it is preferred that when not producing negative pressure in the oily side, the sealing lip is close to the outer peripheral face of the axle, and described
Outer peripheral face of the dust excluder lips radially away from the axle；Negative pressure is produced in the oily side, and acting on makes the sealing lip from the axle
Outer peripheral face lift power when, the air side of the cylindrical portion bends, so that the dust excluder lips are close to the axle
Outer peripheral face.
Furthermore it is preferred that the sealing lip has pump groove in its inner circumferential side.
Thus, the lubrication of the contact surface between oil sealing and axle is maintained.
Invention effect
It is as described above, it is sealed according to the present invention there is provided one kind between axle and axis hole, atmospheric side and oily side is separated
Oil sealing, the oil sealing produces negative pressure even in oily side can also keep the contact with axle.
Brief description of the drawings
Fig. 1 is the schematic cross-section for the oil enveloping structure for representing embodiments of the invention, represents the shape under the conditions of
State.
Fig. 2 is the schematic cross-section for the oil sealing for representing embodiments of the invention, represents the state when oily side produces negative pressure.
Symbol description
10：Oil sealing
12：Axis hole
14：Housing
16：Axle
20：Fixed part
24：Snake belly tube portion
26：Cylindrical portion
28：Curve portion
30：Sealing lip
32：Dust excluder lips
A：Atmospheric side
O：Oily side
Embodiment
Referring to the drawings, it is described in detail by taking embodiment as an example to implementing embodiments of the present invention.In no spy
Surely in the case of record, the scope of the present invention is not limited to size, material, the shape of component parts described in the embodiment
Shape and its relative configuration etc..The oil sealing of the present embodiment is used to seal the space in the crankcase of engine.
In addition, in the following description, some key element or layer be expressed as being located at another key element or layer " on ", with it is another will
In the case of element or layer " being close to " etc., the key element or layer can be directly on another unit or layer, or abut directly in another
Unit or layer, or, also can have the key element intervened or layer middle.
(embodiment)
Reference picture 1, is illustrated to the energy-saving oil sealing 10 of embodiments of the invention.Oil sealing 10 is to axle 16 and housing 14
Axis hole 12 between sealed, atmospheric side A and oil side O are separated.There is oil sealing 10 inner peripheral surface relative to axis hole 12 to fix
Fixed part 20.In the present embodiment, fixed part 20 is arranged on, and is fixed on ring inner peripheral surface, being made of metal of axis hole 12
Shape part 22.The shape of fixed part 22 and endless member 22 can also illustrate the shape beyond shape.In addition, can also be not provided with
Endless member 22, but fixed part 20 is abutted directly in the inner peripheral surface of axis hole 12.
Oil sealing 10 has the snake belly tube portion 24 extended from fixed part 20 towards axial direction and towards radially inner side.Snake belly tube portion 24 due to
To two sides extension axially and radially, therefore it can be bent to radially inner side.In addition, oil sealing 10 has axially from snake belly tube portion
The cylindrical portion 26 that the end 25 of 24 radially inner side extends to atmospheric side A.It is formed with the end of the atmospheric side of cylindrical portion 26 curved
Transfer part 28.In addition, oil sealing 10 has vertically from the portion that curves 28 to radially inner side and towards oily side O extensions, the outer peripheral face with axle 16
Slidably it is adjacent to and falls admedial sealing lip 30.Moreover, oil sealing 10 has curves portion 28 from cylindrical portion 26 vertically
The dust excluder lips 32 extended to radially inner side and atmospheric side A.Portion 28 is curved to be thicker than in cylindrical portion 26, sealing lip 30, dust excluder lips 32
Any one.Thus, curve portion 28 to be formed as not allowing yielding shape, turned back (bending) relative to cylindrical portion 26.
Sealing lip 30 has multiple pump grooves 34 in radially inner side.Pump groove 34 is used to maintain between sealing lip 30 and axle 16
The lubrication of contact surface.Do not produce negative pressure in oily side O, although or produce under few use condition, as shown in figure 1, close
Envelope lip 30 is close to axle 16, and dust excluder lips 32 leave axle 16.Sealing lip 30 is close to low friction with axle 16.On the other hand, exist
Oily side is produced under the use condition of negative pressure, as shown in Fig. 2 by the negative pressure, effect makes the power (figure that sealing lip 30 is lifted from axle 16
Arrow P in 2).On the other hand, by the shape in snake belly tube portion 24, cancelled out each other with the power, maintenance is acted on cylinder 26 close
Seal the power (the arrow Q in Fig. 2) that lip 30 and axle 16 are contacted.Moreover, when oily side O is formed as vacuum state, oil sealing 10 is designed
As shown in the arrow R in Fig. 2, to make sealing integrally be shaken around the portion that curves 28.That is, oil sealing 10 is with sufficiently flexible knot
Structure, to be shaken by producing vacuum in oily side O, makes dust excluder lips 32 contact the flowing so as to seal gas with axle 16.Separately
Outside, before sealing lip 32 is lifted completely, sealing lip 32 is contacted with axle 16.Thus, dust excluder lips 32 are made to be contacted with 16 (in Fig. 2
Arrow S), it will not make to expand by the air flow of the inner circumferential side of oil sealing 10.
In addition, encapsulant can be using plastics, rubber or PTFE, TPE (thermoplastic elastomer (TPE)), TPV (cross-linking type thermoplastics
Property elastomer) etc. elastomer in extensive range.
Claims (2)
1. a kind of oil sealing, it is sealed between axle and axis hole, atmospheric side is separated with oily side, it is characterised in that have：
Fixed part, it is fixed relative to the inner peripheral surface of the axis hole；
Snake belly tube portion, it extends from the fixed part towards direction of principal axis and towards radially inner side；
Cylindrical portion, its radially inner side end vertically from the snake belly tube portion extends to the atmospheric side；
Elongated sealing lip, it prolongs from the air side of the cylindrical portion towards radially inner side and towards the oily side vertically
Stretch, be slidably adjacent to the outer peripheral face of the axle；
Dust excluder lips, it extends from the air side of the cylindrical portion towards the atmospheric side vertically,
Wherein, when not producing negative pressure in the oily side, the sealing lip is close to the outer peripheral face of the axle, and the dust excluder lips edge
The outer peripheral face of the axle radially away；
Negative pressure is produced in the oily side, and is acted on when making the power that the outer peripheral face of the sealing lip from the axle is lifted, the cylinder
The air side in portion bends, so that the dust excluder lips are close to the outer peripheral face of the axle.
2. oil sealing according to claim 1, it is characterised in that the sealing lip has pump groove in its inner circumferential side.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/172,329 | 2014-02-04 | ||
| US14/172,329 US9695937B2 (en) | 2014-02-04 | 2014-02-04 | Energy saving seal with vacuum induced counter-balance and rocking feature |
| JP2014161917A JP6405777B2 (en) | 2014-02-04 | 2014-08-07 | Oil seal |
| JP2014-161917 | 2014-08-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104819298A CN104819298A (en) | 2015-08-05 |
| CN104819298B true CN104819298B (en) | 2017-09-26 |
Family
ID=53729697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510056167.4A Expired - Fee Related CN104819298B (en) | 2014-02-04 | 2015-02-03 | Oil sealing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104819298B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107461496B (en) * | 2016-06-06 | 2021-01-29 | 舍弗勒技术股份两合公司 | Sealing member and rotating assembly |
| DE102018213606A1 (en) * | 2018-08-13 | 2020-02-13 | Zf Friedrichshafen Ag | Joint and method of making such a joint |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1865212B1 (en) * | 2005-03-15 | 2013-09-25 | Thk Co., Ltd. | Ball joint |
| US7959157B2 (en) * | 2006-12-13 | 2011-06-14 | Skf Usa Inc. | Seal with guide member |
| US8313106B2 (en) * | 2010-04-06 | 2012-11-20 | Freudenberg-Nok General Partnership | Energy saving seal with main lip and dust lip hinge point |
| JP5212670B2 (en) * | 2011-07-08 | 2013-06-19 | Ｎｏｋ株式会社 | Sealing device for water pump |
-
2015
- 2015-02-03 CN CN201510056167.4A patent/CN104819298B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN104819298A (en) | 2015-08-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170926 |