CN104747728A - Seal ring - Google Patents
Seal ring Download PDFInfo
- Publication number
- CN104747728A CN104747728A CN201510114960.5A CN201510114960A CN104747728A CN 104747728 A CN104747728 A CN 104747728A CN 201510114960 A CN201510114960 A CN 201510114960A CN 104747728 A CN104747728 A CN 104747728A
- Authority
- CN
- China
- Prior art keywords
- seal ring
- sealing lip
- truncated cone
- cone shape
- axle
- 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
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- 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
- F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing With Elastic Sealing Lips (AREA)
Abstract
The invention relates to a seal ring, in particular to a radial shaft seal ring. The seal ring is used for separating an inner cavity (6) from an outer cavity (7) in a sealing mode, wherein the inner cavity (6) at least partially surrounds a shaft (7) correspondingly. The seal ring comprises a sealing lip (2) which is limited by a first truncated cone shape circumferential face (3) and a second truncated cone shape circumferential face (4). In the axial direction (11), the first truncated cone shape circumferential face (3) is located towards the outer cavity (5), and the second truncated cone shape circumferential face (4) is located towards the inner cavity (6). The first truncated cone shape circumferential face (3) and the second truncated cone shape circumferential face (4) are connected at an installation position through an annular contact face (23), attached to the shaft (7), of the sealing lip (2). A first angle beta which is 23-40 degrees is formed between the first truncated cone shape circumferential face (3) and the shaft (7) at the installation position. The inner diameter (24) of the annular contact face (23) attached to the shaft (7) is 1-15 mm at the installation position. The inner diameter depends on the diameter of the corresponding shaft (7) to be sealed.
Description
Technical field
The present invention relates to by the sealing of seal ring to the housing opening passed by axle, wherein, seal ring is extremely corresponding by one
Inner chamber and an exocoel of small part encirclement axle are separated.At this, inner chamber can be housing cavity, and this housing cavity is by seal ring phase
The exocoel surrounding housing is separated to wiper seal where necessary, thus liquid, gas and/or particulate can not
Flow out from housing cavity, material can not enter housing cavity from exocoel.Therefore, the present invention also relates to one has this
The housing of seal ring.
Background technique
By the known a kind of seal ring being designed to radial shaft seals circle of EP 1156242B1, its by an annular, metal
The sealing lip that support is connected with one is thereon formed.Radial shaft seals circle is passed by axle in mounting point, and wherein, sealing lip will
Particularly be in hydraulic pressure side under pressure in other words inner chamber or housing cavity and atmospheric side in other words exocoel separate hermetically.This
Outward, sealing lip to be pressed on axle by garter spring and can also to enter towards atmospheric side orientation, additional sealing lip
The low dust of one step-down may enter towards housing cavity direction towards the direction of hydraulic pressure side and therefore.Sealing lip is basically by two
Truncated cone shape side face is formed, and wherein, the first truncated cone shape week is directed towards exocoel in other words facing to atmospheric side, and the second truncated cone shape week
Facing to hydraulic pressure side, inner chamber is directed in other words.First truncated cone shape side face has a kink, thus at the unassembled shape of seal ring
In state, the angle [alpha] between axial direction and the first truncated cone shape side face can in the region of the surface of contact of sealing lip on axle
To be designed to 35 to 65 degree, to be preferably 45 to 60 degree.Second truncated cone shape side face is 15 to 30 degree relative to the angle beta of axial direction, is preferably 17 to 22 degree in unassembled state.In the mounting point of seal ring and axle, angle [alpha] and the about formed objects of β and have between 20 to 50 degree, be preferably the value of 30 degree.The unassembled state of angle [alpha], β is relative to this change of mounting point owing to overlap, and because this overlap on the one hand the change of this axle occurs just when axle inserts in seal ring, and the circumference of sealing lip is flexibly expanded when axle is installed on the other hand.
A kind of Sealing, Sealing especially for running shaft is described, seal bag in DE 2458773A1
That draw together a metal, annular support, this support is connected with a sealing lip.In order to avoid due to by housing cavity
The pressure load that the pressure of middle appearance causes and bending, towards exocoel orientation, the face that limits sealing lip is designed to without bending.
In addition, lucky this restriction sealing lip, in the face of exocoel orientation when installation shaft time discontinuity sealing lip may be caused to overturn turn down in other words.This can just not had the design of discontinuity in other words to reduce by the design of this nothing bending or be prevented.At this, the angle between the face of this restriction sealing lip is in the region of the surface of contact of sealing lip on axle is---before installation shaft---at least 35 degree.Due to overlap, may reduce smaller in the mounting point of Sealing and axle in this this angle.In addition, because the relative overvoltage that may appear in housing cavity can make the value of this angle reduce further.
The sealing lip of seal ring by the conical surface intersected each other, that is by truncated cone shape periphery bounds, this seal ring
Therefore be used in the region of housing opening usually used as Sealing, passed by axle at described housing opening middle shell.Usually, seal
The lip of circle has radial overlap in other words relative to the face that will seal relative to the axle that will be applied in seal ring, thus
When being applied in seal ring by axle, sealing lip is by radial tightening and expand.Due to the pretightening force of radial direction, sealing lip wraps hermetically
Enclose the face or axle that will seal.When the surface of contact of the annular of the formation of sealing lip on axle has the large diameter of > 20mm, sealing lip does not almost affect with the overlapping axial width on surface of contact preset on the surface that will seal of axle.This reason is, tool
Have the seal ring of the large sealing lip circumferential length in ground large diameter and associated with it can expand overlapping value when it is arranged on axle, and this can not be applied to the radial compacting force on the face that will seal to sealing lip and and then have adverse effect to the axial width of surface of contact no problemly.But, shaft diameter and and then the internal diameter of annular contact surface of seal ring less, sealing lip declines fewer in possible expansion circumferentially.Therefore along with the minimizing of the internal diameter of axle radius or the sealing lip surface of contact on axle, may occur that this surface of contact is just due to impacting force on the face that will seal of undesirably high distortion and sealing lip and widening of occurring.But surface of contact widen sealability that cause the higher wearing and tearing of sealing lip and variation, that cannot distinguish.If surface of contact also moves towards exocoel or towards atmospheric side intentinonally, then particularly startup-out of service in, may in sealing lip especially not enough lubricate there is breach or otch more.May occur thus leaking in the region of sealing lip.
Summary of the invention
The object of the invention is to, propose a kind of seal ring of improvement or a kind of shell with this seal ring of improvement
Body, wherein, the length of life of seal ring Ying Chang has good usability, even if when it only has small diameter
Also be like this.
According to the present invention, this object is realized by the theme of independent claims.Favourable mode of execution is appurtenance
The theme required.
As one aspect of the present invention, propose a kind of seal ring, particularly radial shaft seals circle, for by one at least
The inner chamber exocoel that at least partly surround axle same with that part surrounds axle is separated hermetically.Sealing circle is equipped with and passes through
The sealing lip of one first and one the second truncated cone shape periphery bounds.At this, the first truncated cone shape side face in the axial direction towards
Exocoel is directed, and the second truncated cone shape side face is directed towards inner chamber in the axial direction.In addition, each truncated cone shape side face is in mounting point
Abut in surface of contact on axle, annular by one of sealing lip to be interconnected.First truncated cone shape side face and axle are in mounting point
Form the first angle of 23 to 40 degree.At this, the internal diameter abutting in surface of contact on axle, annular is 1 to 15mm in mounting point, and this internal diameter depends on the diameter of the corresponding axle that will seal.
Advantageously, although still can peace be formed in by this design proposal of sealing lip is overlapping with the surface that will seal
The less axial width of the surface of contact of holding position and axle.
Axle can be arranged through housing or housing opening like this, that is, axle is not only by housing cavity but also by around housing
Exocoel around.In the housing opening passed by axle, seal ring may be used for inner chamber to seal by regulation relative to exocoel
Or separate.Housing cavity can have liquid, gas, particulate material etc. at this and be in the pressure raised relative to exocoel
Under power.Therefore, seal ring prevents the outflow such as liquid, gas, particulate material that is arranged in housing cavity.This external sealed
Circle prevents material from entering inner chamber from exocoel.Advantageously can prevent inner chamber thus and be arranged on liquid, gas, granular wherein
Materials etc. are subject to the pollution of the pollutant coming from exocoel.
The sealing lip of seal ring realizes separating of exocoel and inner chamber substantially in the mounting point with axle, sealing lip leads to
Cross two truncated cone shape periphery bounds.In other words, sealing lip is by the truncated cone shape periphery bounds intersected each other.In unassembled state
When neutralization does not have wear trace possibly, each truncated cone shape side face of sealing lip can be interconnected mutually by the contact seamed edge of a circle
Connect.If inserted by axle now, then therefore seal ring to proceed in mounting point and sealing lip is pressed to like this due to overlap
On axle, make the surface of contact forming an annular on sealing lip, sealing lip utilizes this surface of contact to abut on axle subsequently.At this,
Overlapping or radial overlap can be understood as between axle radius and the relatively little radius of sealing lip in unassembled state
Difference.If insert in seal ring by axle now, then therefore sealing lip is circumferentially expand due to this overlap and produce just
The surface of contact of raw annular, sealing lip utilizes this surface of contact to abut on axle.At this, sealing lip can in institute in unassembled state
State and between two truncated cone shape side faces, to be also configured to rounding.Axial direction can be understood as along axle with the direction in the mounting point of seal ring.
Abut on axle, annular surface of contact internal diameter and and then shaft diameter can be 3 to 15mm in mounting point.
When these little internal diameters lucky or shaft diameter, due to the above-mentioned of seal ring and following enforcement side
Formula, can form the less axial width of the expectation of surface of contact.Can be that these little shaft diameters or internal diameter are true thus especially
Higher robustness/the robustness of secret seal.In addition, particularly lubricate inadequate time, especially startup-out of service
In, at least can be reduced in sealing lip and occur breach or crack.In addition, particularly in its seal action, especially relative
In the eccentric shaft rate that may occur with relative to pressure, seal ring is insensitive.
In this concentrated layout of surface of contact, balancedly form to almost identical size in other words towards the share of exocoel with the surface of contact arranged towards inner chamber, this layout can by being that the first angles of 23 to 40 degree realize in mounting point.
The design proposal of surface of contact can also by improving for the first angle of 28 to 35 degree.
This design proposal of surface of contact can by being arranged in mounting point between the second truncated cone shape side face and axle
The respective design of the second angle is supported.This second angle can be 37 to 57 degree, preferably 42 to 52 degree.Pass through
This design proposal of the second angle, can make the width of surface of contact minimize and balancedly design at exocoel and inner chamber equally
In the share of surface of contact.
The first this favourable angle in the mounting point of seal ring and axle and the second angle can obtain forming with supporting when mounted thus, that is, the first angle and the second angle value that has in unassembled state accordingly, preset.Therefore, the first angle can have 37 to 50 degree, be preferably the value of 42 to 45 degree in unassembled state.Second angle can be
There are in unassembled state 30 to 45 degree and be preferably 35 to 40 values spent.
Utilize the first and second angles preset like this in the unassembled state of seal ring, favourable first and second
Angle can in the mounting point of seal ring and axle, be formed after being installed in seal ring by axle.
In addition, seal ring can have one be arranged in exocoel and/or towards exocoel directionally arrange additional
Sealing lip.Advantageously, can be reduced by this additional sealing lip or prevent material to enter inner chamber from exocoel further and
Therefore resist inner chamber to be polluted.
Also an intermediate cavity can be provided with between sealing lip and additional sealing lip.This intermediate cavity is limited by each sealing lip
And by two sealing lip sealings.In the mounting point with axle, oiling agent can be introduced in the intermediate chamber, such as fat, oil, graphite, polytetrafluoroethylene etc.Therefore advantageously the intermediate cavity be arranged between these two sealing lips can be used as lubricant reservoir.
In addition, seal ring can have an annular, carrying support.This annular, the support of carrying can be by
Metal or by other high temperature resistant and on-deformable material make.This annular, carrying support substantially can design
For sleeve.
By this annular, the support of carrying can make seal ring stable and reinforce on the whole.Thereby simplify special
It is ease for operation when mounted.In addition, by annular, the shape of the support outside of predetermined seal ring substantially of carrying
And size.Seal ring can be installed to endurance in its installation cavity in the housing.
In addition, seal ring can have portion's section of a hollow cylinder, and sealing lip is connected to this hollow cylinder like this
In portion's section, that is, the inner peripheral surface of portion's section of hollow cylinder is transitioned in the first truncated cone shape side face.
The the first truncated cone shape side face transitted directly in the inner peripheral surface of portion's section of hollow cylinder can be configured to without bending
.Owing to there is no discontinuity or bending part in the first truncated cone shape side face, can avoid or prevent axle is being loaded sealing
The upset of sealing lip or bending time in circle.
In addition, annular, the support of carrying can be connected with the sealing lip added by portion's section of a hollow cylinder.
Therefore, the intermediate cavity be arranged between these two sealing lips can be formed by portion's section of hollow cylinder, thus such as can optimize the volume of corresponding expectation for lubricant reservoir.
In addition, can the radial direction of sealing lip away from side be provided with the tension element of an annular, utilize this tensioning unit
Sealing lip can be pressed on axle in mounting point by part.
This tension element can be configured to garter spring.Tension element has radial power effect.Tension element
The independent component that is such as made of metal or shaping integratedly with the sealing lip be made up of elastic material can be configured to.Cause
This can expect equally, and tension element is made by with the same or similar material of sealing lip and is integrally formed therewith.
Advantageously, can produce additional impacting force by tension element, utilizing this impacting force to be additional to, other is possible
Power can form surface of contact equally.Therefore such as contact can be made by the change of the action plane of the radial force effect of tension element
Position and the shape in face change.
At this, the action plane of the radial force effect of tension element relative to sealing lip contact plane vertically toward the outside
Chamber is shifted.This may be the situation in mounting point and/or the unassembled state at seal ring.By this of tension element
Kind of location also can realize particularly relative to axle eccentricity and come from that the relevant pressure of inner chamber loads higher sane
Property.Each truncated cone shape side face is steady all the time in the whole length of life of seal ring relative to the angle on the surface that will seal thus
Fixed.
Portion's section of sealing lip and additional sealing lip and hollow cylinder can by identical or by different material structures
Become.Before all, the component mentioned can by having identical elasticity or different flexible material is made.Above-mentioned component can
To be made up of identical or different material and identical by elasticity or that elasticity is different material to combine arbitrarily.Carry above
To component can in different combinations integral with one another ground or multipart form.Therefore, they can by different or
Identical material sprays injection molded each other or can have for stable other support, and this support sprays
Be injected with elastic material.Portion's section of hollow cylinder can annular, the support of carrying sprays injection moulding or in addition with
It connects.
Propose a kind of housing with aforesaid seal ring in another aspect of the present invention.This housing has more
Sane and more insensitive, operationally to wear and tear less Sealing, even if when the seal ring used uses by fixing at it
Period is matched with when the shaft diameter ground that will seal only has an internal diameter of 3 to 15mm also like this.
Accompanying drawing explanation
Schematically show respectively in figure:
Fig. 1 illustrates the seal ring in unassembled state,
Fig. 2 illustrate with the seal ring in the mounting point of axle.
Embodiment
Fig. 1 shows the seal ring 1 in unassembled state.Sealing circle 1 is equipped with a sealing lip 2, sealing lip
Limited by a first truncated cone shape side face 3 and a second truncated cone shape side face 4.First truncated cone shape side face 3 is towards exocoel 5
Orientation, and the second truncated cone shape side face 4 is directed towards inner chamber 6.Because this seal ring 1 may be used for such as hermetically passing shell
The axle 7 of body opening, therefore inner chamber 6 can be housing cavity, and exocoel 5 surrounds housing.
The axle 7 that will insert subsequently is also illustrated, the overlap of sealing lip 2 to be described in the unassembled state illustrated
9。The first angle beta is provided with between the first truncated cone shape side face 3 and the axle 7 that will insert subsequently, and at the second truncated cone shape side face
The second angle [alpha] is provided with between 4 and the axle 7 that will insert subsequently.
In addition, seal ring 1 is equipped with an additional sealing lip 10, and this additional sealing lip in axial direction 11 toward the outside
Chamber 5 is directed.An intermediate cavity 12 is provided with between these two sealing lips 2,10.By these two sealing lips 2,10, intermediate cavity 12 is closed hermetically relative to exocoel 5 and/or relative to inner chamber 6.
Seal ring 1 be also equipped with an annular, the support 13 of carrying, this support be used for stable, to reinforce and for shape
Become the external shape of seal ring 1.Due to the complementary design of the external shape of seal ring 1, can realize can simply by seal ring
1 loads in the housing opening 14 of housing 15.In addition, seal ring 1 has portion's section 16 of a hollow cylinder, and sealing lip 2 is connected in this section like this, that is, the inner peripheral surface 17 of portion's section 16 of hollow cylinder is transitioned in the first truncated cone shape side face 3 when not having unexpected direction change.First truncated cone shape side face 3 extends to from the connection part 18 of inner peripheral surface 17 on the first truncated cone shape side face 3 that contact seamed edge 8, first truncated cone shape side face is designed to without bending.
Portion's section 16 of hollow cylinder be connected to annular, on the support 13 of carrying and with additional sealing lip 10
And sealing lip 2 connects.In addition, seal ring 1 has the tension element 20 of an annular in radial direction away from the side of sealing lip 2, utilizes this tension element to be pressed on axle 7 in mounting point by sealing lip 2.At this, the contact plane 22 that the action plane 21 of the radial force effect of tension element 20 is determined relative to the contact seamed edge 8 by circle in axial direction 11 is shifted towards exocoel 5.
In Fig. 1, be also presented at other parameter PD of the sealing lip 1 in unassembled state, s, sh, e, these parameters illustrate in greater detail in the following embodiments.
Embodiment:
The change of the size of one as shown in Fig. 1 possible mode of execution
The value scope that parameter is favourable is preferably worth scope
PD 0.8 to 1.6mm 1.1 to 1.3mm
S 0.6 to 1.2mm 0.8 to 1.0mm
Sh 0.4 to 1.1mm 0.6 to 0.9mm
E 0.4 to 1.0mm 0.6 to 0.8mm
α 30 to 45 spends 35 to 40 degree
β 37 to 50 spends 42 to 45 degree
In the mode of execution shown in Fig. 1, all combinations for the above-mentioned value of parameter be all allow with applicable.
The seal ring 1 according to Fig. 1 in the mounting point with axle 7 has been shown in Fig. 2.At this, in mounting point
The first angle beta ' and the second angle [alpha] ' be different from the first angle beta in unassembled state and the second angle [alpha].This
Outward, a surface of contact 23 is formed when installation shaft 7.
In mounting point, the internal diameter 24 of surface of contact 23 is suitable with the diameter that will seal of axle 7.Equally, action plane 21 occupies the position relative to contact plane 22 different from unassembled state in mounting point.
Claims (9)
1. seal ring, particularly radial shaft seals circle, for by outside the inner chamber (6) and of a corresponding at least part of encirclement axle (7)
Chamber (5) is separated hermetically, has a sealing lip (2) limited by the first and second truncated cone shape side faces (3,4), wherein,
On axial direction (11), the first truncated cone shape side face (3) towards exocoel (5) directed and the second truncated cone shape side face (4) towards interior
Chamber (6) is directed, and each truncated cone shape side face (3,4) is on axle (7) by abutting in of sealing lip (2) in mounting point, annular
Surface of contact (23) is interconnected, and the first truncated cone shape side face (3) and axle (7) form 23 to 40 first jiaos of spending in mounting point
Degree (β '), the internal diameter (24) abutting in surface of contact (23) on axle (7), annular is 1 to 15mm in mounting point, should
Internal diameter depends on the diameter of the corresponding axle (7) that will seal.
2. according to the seal ring described in claim 1, it is characterized in that, described first angle (β ') is 28 in mounting point
To 35 degree.
3. according to seal ring in any one of the preceding claims wherein, it is characterized in that, described second truncated cone shape side face (4)
37 to 57 the second angles spent (α ') are formed in mounting point with described axle (7).
4. according to seal ring in any one of the preceding claims wherein, it is characterized in that, described first angle (β) is non-
Be 37 to 50 degree in assembling condition.
5., according to the seal ring described in claim 3, it is characterized in that, and described second angle (α ') in non-assembling condition
Be 30 to 45 degree.
6. according to seal ring in any one of the preceding claims wherein, it is characterized in that, described seal ring (2) has to be established
Put the additional sealing lip (10) in described exocoel (5).
7. according to the seal ring described in claim 6, it is characterized in that, at described sealing lip (2) and described additional sealing lip
(10) intermediate cavity (12) is provided with between.
8. according to seal ring in any one of the preceding claims wherein, it is characterized in that, described seal ring (1) has a ring
Shape, carrying support (13).
9. according to seal ring in any one of the preceding claims wherein, it is characterized in that, described seal ring (1) has had
The heart columniform portion section (16), described sealing lip (2) is connected in portion's section of this hollow cylinder like this, that is, described open circles
The inner peripheral surface (17) of portion's section (16) of cylindricality is transitioned in described first truncated cone shape side face (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510114960.5A CN104747728A (en) | 2015-03-17 | 2015-03-17 | Seal ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510114960.5A CN104747728A (en) | 2015-03-17 | 2015-03-17 | Seal ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104747728A true CN104747728A (en) | 2015-07-01 |
Family
ID=53587834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510114960.5A Pending CN104747728A (en) | 2015-03-17 | 2015-03-17 | Seal ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104747728A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109869487A (en) * | 2017-12-01 | 2019-06-11 | 卡尔·弗罗伊登伯格公司 | Sealing ring and sealing device arragement construction with such sealing ring |
-
2015
- 2015-03-17 CN CN201510114960.5A patent/CN104747728A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109869487A (en) * | 2017-12-01 | 2019-06-11 | 卡尔·弗罗伊登伯格公司 | Sealing ring and sealing device arragement construction with such sealing ring |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150701 |
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| WD01 | Invention patent application deemed withdrawn after publication |