CN108591468A - Sealing device - Google Patents
Sealing device Download PDFInfo
- Publication number
- CN108591468A CN108591468A CN201810385547.6A CN201810385547A CN108591468A CN 108591468 A CN108591468 A CN 108591468A CN 201810385547 A CN201810385547 A CN 201810385547A CN 108591468 A CN108591468 A CN 108591468A
- Authority
- CN
- China
- Prior art keywords
- skeleton
- component
- sealing device
- elastic material
- axial
- 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.)
- Pending
Links
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
-
- 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
- F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
- F16J15/3252—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports
Abstract
The present invention relates to axis and field of bearings, and in particular to sealing device is used to be installed on and realizes sealing between first component and the second component for surrounding first component comprising：Skeleton；Elastic material, the elastic material then extends in the skeleton and from the skeleton towards the first component, the skeleton includes axial continuation and from the axial continuation towards the radially extending extension of the first component, and the axial continuation of the skeleton is in wavy extension in the axial direction.Sealing device according to the present invention is less susceptible to be detached from sealing station therefore with better seal effect.
Description
Technical field
The present invention relates to axis and field of bearings, and in particular to sealing device, more particularly, between axis and shell,
Or the sealing device of dynamic sealing is carried out between the inner ring and outer ring of bearing.
Background technology
Sealing device well known in the art for axis and field of bearings is used between axis and shell, or
Dynamic sealing is carried out between the inner ring and outer ring of bearing.The sealing device is whole annular in shape and includes skeleton and then in bone
The rubber of frame.Skeleton includes approximately along the axially extending extensions axial A of the sealing device and approximately along the sealing
The radially extending extensions radial R of device.Radially extending portion is from axial one end of axial continuation to radially inner side
Extend.Rubber is then in axial continuation and radially extending portion, and the radial inner end beyond radially extending portion and shape
At primary seal lip and dustproof lip.
Above-mentioned sealing device for major applications environment enough, however for bearing vibration and pressure
System, this sealing device have the disadvantage that：On the one hand since vibration may cause sealing device to be shifted from sealing station, this
It will lead to seal failure.On the other hand, if elastic material is by compression set rate (permanent compression
Set value) big rubber material is made, such as ethylene propylene diene rubber (EPDM), generate leakage after vibrating or being pressurized
Risk it is very high.
Invention content
Defect based on the above-mentioned prior art is made that the present invention, main inventive of the invention are designed to provide one kind
Sealing device, which improve sealing safeties.
Sealing device according to the present invention be used to be installed on first component with surround the first component second component it
Between realize sealing, the sealing device includes：Skeleton；Elastic material, the elastic material then in the skeleton and from
The skeleton extends towards the first component, and the skeleton includes axial continuation and from the axial continuation court
To the radially extending extension of the first component, the axial continuation of the skeleton is in wavy prolong in the axial direction
It stretches.
Particularly, the first component is the inner ring of axis or bearing, and the second component is the outer ring of shell or bearing.
Particularly, the elastic material is located at the radially inner side of the radially extending portion of the skeleton, the axis of the skeleton
It is used to contact with the radially inner side face of the second component to the radial outside of extension.
Particularly, the radial outer side of the elastic material with the radially inner side face of the second component for contacting, institute
The radially inner side face of elastic material is stated for being contacted with the radial outer side of the first component, the skeleton is located at described the
Between the radially inner side face and the radial outer side of the first component of two components.
Particularly, at least part of the radially extending portion of the skeleton is surrounded by the elastic material.
Particularly, the radially extending portion of the skeleton is surrounded by the elastic material completely.
Particularly, the radially inner side of the radially extending portion of the skeleton is connect with the radial outside of the elastic material,
The radial outside of the radially extending portion of the skeleton is connect with the axial side of the axial continuation of the skeleton.
Particularly, the axial continuation include positioned at radial outside at least two peak potions and positioned at diameter it is inside
At least one valley of side, the peak potion are arranged alternately in the axial direction with the valley.
Particularly, the skeleton is made of close with the second component or identical material.
Particularly, the elastic material is that rubber and/or the skeleton are made of metal.
It is in wavy axially extending extension in the axial direction that the skeleton of sealing device according to the present invention, which has,
The elastic force bigger of the skeleton of the elastic force of offer than in the prior art, and make the compression set of entire sealing device
Rate becomes smaller, therefore seals more reliable.In addition the stress concentrated is generated at wavy each wave crest that axial continuation is constituted,
Which significantly improves sealing effects.So for the system applied to vibration working environment, sealing dress according to the present invention
It sets and is less susceptible to be detached from sealing station therefore with better seal effect.
Other technologies scheme about the present invention is shown in specific embodiment part with technique effect.
Description of the drawings
Fig. 1 shows the axial, cross-sectional view of typical sealing device in the prior art.
Fig. 2 shows the axial, cross-sectional views of sealing device according to the first embodiment of the invention.
Fig. 3 shows the axial, cross-sectional view of sealing device second embodiment of the invention.
Reference sign
1 sealing device；2 second components；3 first components；
10 skeletons；20 elastic materials；30 springs；
11 axial continuations；12 radially extending portions；
21 primary seal lips；22 dust seal lips；
10 ' skeletons；
A is axial；R is radial.
Specific implementation mode
Exemplary embodiments of the present invention are described with reference to the accompanying drawings.It should be appreciated that these specific descriptions are only used for
How teaching those skilled in the art implement the present invention, rather than the exhaustive present invention all feasible modes, without in
It limits the scope of the invention.
In the following detailed description, unless stated otherwise, refer to axially the axial A of sealing device of the invention, with
Using the present invention the component that is sealed of sealing device it is axial consistent, refer to radially the radial direction of the sealing device of the present invention
R, it is radially consistent with the component that is sealed.Where the sealing space (or sealing medium) that sealing device is sealed
Side is known as axially inner side, and the opposite side of the side where axial upper sealing space (or sealing medium) is referred to as axially external,
For example, in fig. 1-3, the right side of sealing device is axially inner side, and the left side of sealing device is axially external.
It is to be appreciated that first component 3 according to the present invention can be the inner ring of axis or bearing, second component 2 can be shell or
The outer ring of bearing, below all embodiments be all suitable for the above situation.
Fig. 1 shows the axial, cross-sectional view of typical sealing device in the prior art.For in first component 3 and
The sealing device 1 that dynamic sealing is carried out between two components 2 has skeleton 10 ', spring 30 and elastic material 20.Wherein, elastic material
Material 20 is, for example, rubber and forms primary seal lip 21 and dust seal lip 22.
In the axial, cross-sectional view of sealing device, skeleton 10 ' is formed as L-shaped, and L-shaped skeleton 10 ' includes axially-extending portion
Points 11 and from the axial continuation 11 towards 3 radially extending extension 12 of the first component.
The radial outer side of elastic material 20 is contacted with the radially inner side face of second component 2, the radially inner side of elastic material
Face is contacted with the radial outer side of first component 3.
The axial continuation 11 of skeleton 10 ' is along straight extension, at least part of axial continuation 11, such as
The part of the axially inner side of axial continuation 11 by elastic material 20 surround or axial continuation 11 on the whole by
Elastic material 20 surrounds.
Primary seal lip 21 and dust seal lip 22 are schematically dashed forward to first component 3, thus indicate interference connection, without
It is to indicate that primary seal lip 21 and dust seal lip 22 are embedded into first component 3.
In use, due to the elastic material of skeleton made of metal material and interference fit, sealing device 1 by
It is achieved in the radial pressure of first component 3 and second component 2 to be fixed between first component 3 and second component 2
Sealing.
However there is the wind of leakage in the system for bearing vibration and pressure, such as existing sealing device shown in FIG. 1
Danger, following proposal of the invention improve this sealing device.
First embodiment
Fig. 2 shows the axial, cross-sectional views of sealing device according to the first embodiment of the invention, identical with Fig. 1
Structure feature be not repeated, illustrated only for improvements.
Different from the skeleton of the sealing device of the prior art, the axial continuation 11 of the skeleton 10 of first embodiment
It is in wavy extension in the axial direction.In fig. 2, the axial continuation 11 of skeleton 10 have positioned at radial outside 3 wave crests,
Positioned at 2 troughs of radially inner side, peaks and troughs are arranged alternately.The waveform that the peaks and troughs are constituted can be sine wave
Or other waveforms.Elastic material 20 all surrounds peaks and troughs, also only surrounds the wave crest or trough of part certainly.
It should be understood that the number and shape of the wave crest of present embodiment, trough are not limited to quantity and shape shown in Figure 2
Shape can also be the waveform of other quantity and shape.The axial continuation 11 of skeleton 10 can be rendered as wavy tubulose knot
Structure.
Skeleton 10 can be made of metal, especially steel.
The axial continuation of the skeleton 10 ' of straight setting in compared with prior art, wavy axial continuation 11
It is not only effectively increased size, but also its intensity increases with elastic force, the elastic force provided can more effectively fixing seal fill
It sets.Because thus the elastic force bigger of the skeleton 10 ' of the elastic force that such skeleton 10 provides than in the prior art makes entire
The compression set rate of sealing device 1 becomes smaller, therefore seals more reliable.
In addition the stress concentrated is generated at each wave crest of waveform and presses to elastic material 20 so that elastic material herein
A greater degree of flexible deformation occurs for material 20, and which significantly improves sealing effects.
So for the system applied to vibration working environment, sealing device 1 according to the present invention is less susceptible to be detached from
Therefore sealing station has better seal effect.
In addition, the prior art compared to Fig. 1, at least the one of the axial continuation of skeleton 10 is surrounded in elastic material 20
In the case of part, the contact effective area between elastic material 20 and the axial continuation of skeleton 10 increases, it means that
Attachment between skeleton 10 and elastic material 20 is more secured, therefore can also obtain better seal effect.
Second embodiment
Fig. 3 shows the axial, cross-sectional view of sealing device second embodiment of the invention.Present embodiment with
Identical structure feature is not repeated in Fig. 2, is illustrated only for difference.
Different from the radially inner side for contacting second component 2 using elastic material 20 of the sealing device of first embodiment
Face, the radial outside inelastic materials 20 of the axial continuation 11 of the skeleton 10 of second embodiment, axial continuation 11
Radial outside for being contacted with the radially inner side face of second component 2.
Compared with prior art, even if the radial outside of axial continuation 11 is not surrounded by elastic material 20, the skeleton 10
The wavy texture of axial continuation 11 ensure that it with enough intensity and elastic force, the compression of entire sealing device 1
Permanent set becomes smaller, can it is more effective, be securely fixed sealing device.
In addition the diameter that the stress that generation is concentrated at each wave crest of waveform directly contact presses to second component 2 is inside
Side is conducive to that a greater degree of flexible deformation occurs, and which significantly improves sealing effects.
Preferably, skeleton 10 is made of close with second component 2 or identical material, so skeleton 10 and the second structure
The similar thermal expansion coefficient of part 2 is identical.This for application environment there are the prodigious temperature difference the case where (such as long distance train
Or aircraft) for be advantageous because when temperature occur acute variation when, due to close or identical thermal expansion
Coefficient not will produce excessive thermal stress between skeleton 10 and second component 2.
Preferably, elastic material 20 is located at the radially inner side of skeleton 10.Specifically, the radial extension 12 of skeleton 10
The radially side section of radial inside portion and elastic material is attached.The set-up mode considerably reduces the packet of elastic material 20
Enclose the structure of skeleton 10 so that while enhancing sealing effect, be further simplified manufacture and maintenance cost.
Protection scope of the present invention is not limited to the specific embodiment illustrated in above-mentioned specific implementation mode, as long as but full
The combination of the technical characteristic of the claim of the foot present invention is just fallen within protection scope of the present invention.
Claims (10)
1. a kind of sealing device, the sealing device is used to be installed on first component and surrounds the second component of the first component
Between realize sealing, the sealing device includes：Skeleton；Elastic material, the elastic material then in the skeleton and
Extend from the skeleton towards the first component,
It is characterized in that,
The skeleton includes axial continuation and prolongs from the axial continuation towards the first component is radially extending
The axial continuation of extending portion point, the skeleton is in wavy extension in the axial direction.
2. sealing device according to claim 1, which is characterized in that the first component is the inner ring of axis or bearing, institute
State the outer ring that second component is shell or bearing.
3. sealing device according to claim 1 or 2, which is characterized in that the elastic material is located at the diameter of the skeleton
To the radially inner side of extension, the radial outside of the axial continuation of the skeleton is for the radial direction with the second component
Medial surface contacts.
4. sealing device according to claim 1 or 2, which is characterized in that the radial outer side of the elastic material is used for
It is contacted with the radially inner side face of the second component, the radially inner side face of the elastic material is for the diameter with the first component
Outside side contact, the skeleton be located at the second component radially inner side face and the first component radial outer side it
Between.
5. sealing device according to claim 1 or 2, which is characterized in that the radially extending portion of the skeleton is at least
A part is surrounded by the elastic material.
6. sealing device according to claim 1 or 2, which is characterized in that the radially extending portion of skeleton quilt completely
The elastic material surrounds.
7. sealing device according to claim 1 or 2, which is characterized in that the radial direction of the radially extending portion of the skeleton
Inside is connect with the radial outside of the elastic material, the radial outside of the radially extending portion of the skeleton and the skeleton
The axial side of axial continuation connects.
8. sealing device according to claim 1 or 2, which is characterized in that the axial continuation includes being located at radial direction
At least two peak potions in outside and at least one valley positioned at radially inner side, the peak potion are handed in the axial direction with the valley
For setting.
9. sealing device according to claim 1 or 2, which is characterized in that the skeleton is by close with the second component
Or identical material is made.
10. sealing device according to claim 1 or 2, which is characterized in that the elastic material is rubber and/or described
Skeleton is made of metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810385547.6A CN108591468A (en) | 2018-04-26 | 2018-04-26 | Sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810385547.6A CN108591468A (en) | 2018-04-26 | 2018-04-26 | Sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108591468A true CN108591468A (en) | 2018-09-28 |
Family
ID=63610148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810385547.6A Pending CN108591468A (en) | 2018-04-26 | 2018-04-26 | Sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108591468A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111750107A (en) * | 2019-03-28 | 2020-10-09 | 舍弗勒技术股份两合公司 | Framework for sealing device and sealing device |
-
2018
- 2018-04-26 CN CN201810385547.6A patent/CN108591468A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111750107A (en) * | 2019-03-28 | 2020-10-09 | 舍弗勒技术股份两合公司 | Framework for sealing device and sealing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180928 |
|
| WD01 | Invention patent application deemed withdrawn after publication |