CN207598909U - A kind of chamfering sealing structure easy to plug - Google Patents
A kind of chamfering sealing structure easy to plug Download PDFInfo
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- CN207598909U CN207598909U CN201721642697.8U CN201721642697U CN207598909U CN 207598909 U CN207598909 U CN 207598909U CN 201721642697 U CN201721642697 U CN 201721642697U CN 207598909 U CN207598909 U CN 207598909U
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Abstract
A kind of chamfering sealing structure easy to plug, it is mainly used in the sealing that fit-up gap is difficult to control and needs often to dismount position, it is made of second component, the first component, flexible seals and four part of connector, the sealing structure is adjusted using second component angle, erection stress is decomposed into axially and radially both direction and component size designs, both solved simple axial seal is influenced tender subject by fit-up gap, it is difficult in turn avoid simple radial seal dismounting, can not be dismantled after can avoiding the problem that sealing structure assembling completely because contact medium sealing element is swollen.
Description
Technical field
The utility model is related to a kind of sealing structure, more particularly to a kind of fit-up gap is not easily controlled or control cost
It is higher, it needs often to dismount the chamfering sealing structure easy to plug of cooperation.
Background technology
Ministry of Astronautics Industry of People's Republic of China (PRC) ministerial standard QJ1035.2《The selection of O shape rubber seal and annular seal space are set
Count specification》Middle that seal type is divided into axial seal and radial seal, this is also current domestic more specification and common classification
Mode, versatility are stronger.Two class sealing structures involved in specification coordinate axial direction (end face) dimensional fits precision, radial dimension
Required precision is higher, and the sealing occasion longer applied to frequent dismounting or assembling Fit dimension chain exposes fit precision control
The problem of cost is higher；And sealing medium polarity it is relatively strong in the case of flexible seals be susceptible to Swelling, it is close after swelling
Seal structure dismounting degree of difficulty sharply increases, and even results in and occurs structural destruction in disassembly process.
Utility model content
Technical problem to be solved in the utility model：It is applied to often dismounting position sealing cooperation essence for axial seal
It is high to spend control cost, radial seal dismantles the problem of difficult after being applied to sealing polarizable medium swelling, and the utility model provides
One kind is for often dismounting position class design of Sealing Structure easy to plug, to reduce axial dimensional chain for assembly to sealing structure performance wave
Dynamic influence.
The technical solution of the utility model：
A kind of chamfering sealing structure easy to plug, including the first component, flexible seals and second component,
The first component is revolving body, and the step groove coaxial with the first component is provided in one end,
Second component is revolving body, and the boss coordinated with step groove is provided in one end, and boss is placed in step groove, shape
Into annular seal space；
In the root of step groove, rectangular channel is radially provided with, in boss outer diameter end-beveling, flexible seals are placed in rectangle
In the space that slot and chamfering surround, the sealing at step groove and boss to the first component and second component is realized.
The elastomer of flexible seals volume invariability, section decrement ranging from 10%~30%.
The angle α angle of chamfering in the axial direction is 30 °~60 °.
The right angle edge lengths b of chamfering in the axial direction is 4~8mm.
Radially depth e is 0.2~0.3 times of in axial direction width c to rectangular channel.
Rectangular channel root rounded corner is R0.2~0.3mm.
The difference of the first component (1) step groove depth and the right angle edge lengths b of second component (2) chamfering in the axial direction >=
2mm。
In axial direction width c is equal with the right angle edge lengths b of chamfering in the axial direction for rectangular channel.
Flexible seals (2) free state diameter of section d1 is less than the angle α tangent value and rectangle of chamfering in the axial direction
Slot radially the sum of depth e.
After the first component is assembled with second component, flexible seals outer diameter decrement is the 1%~2% of free state.
The beneficial effects of the utility model：
(1) the utility model is designed by sealed working face boss outer diameter end-beveling, and erection stress is decomposed into axial direction
With radial direction both direction, compared with radial seal, under the conditions of much compression amount, radial normal stress is reduced to cox a times, effectively
Reduce sealing structure dismounting degree of difficulty；
(2) the utility model step groove root rectangular groove structure can effectively improve sealing structure to axial fit-up gap
Adaptability, and by the design of rectangle groove depth e, the control requirement of axial fit-up gap can be relaxed, so as to reduce cost；
(3) design of the utility model flexible seals outer diameter decrement 1%~2%, can effectively avoid the first component
During adjustment and second component relative position, flexible seals occur misplacing or distorting in rectangular channel, ensure structure dress
With the chamfering working face that rear sealed working face is design.
Description of the drawings
Fig. 1 is the utility model Standard schematic diagram；
Fig. 2 is sealed working face partial schematic diagram；
Fig. 3 is the utility model Standard overall schematic.
Specific embodiment
The present invention will be described in detail below in conjunction with the accompanying drawings.
Volume invariability class flexible seals, by taking rubber as an example, generally existing starts the problem of frictional force is big, in addition
Sealing medium effect leads to sealing element volume sweell(ing), greatly limits radial seal and is applied to often dismounting position.
Another kind of sealing, i.e., axial (end face) sealing, is considered.However often dismounting position axial direction dimensional chain for assembly is longer, especially the
In the case that two components can not be replaced, fit clearance deviation range is larger, this necessarily leads to sealing structure performance wide fluctuations.
In view of the above problems, it needs to take measures to reduce influence width of the axial dimensional chain for assembly to sealing structure performance inconsistency
It is big to avoid the problem that radial seal starts frictional force for degree.Stress decomposition is axially and radially two by angle design by this programme
A direction, in the case where flexible seals decrement is certain, components of stress size depends on the tangent and cotangent of angle.
A kind of chamfering sealing structure easy to plug, as shown in Figure 1, Figure 3, including the first component 1, flexible seals 2 and second
Component 3,
The first component 1 is revolving body, and the step groove coaxial with the first component 1 is provided in one end,
Second component 3 is revolving body, and the boss coordinated with step groove is provided in one end, and boss is placed in step groove,
Form annular seal space 5；
In the root of step groove, rectangular channel is radially provided with, in boss outer diameter end-beveling, flexible seals 2 are placed in square
In the space that shape slot and chamfering surround, the sealing at step groove and boss to the first component 1 and second component 3 is realized.
As shown in Fig. 2, the elastomer of 2 volume invariability of flexible seals, section decrement ranging from 10%~30%,
The angle α tangent value of 2 cross-sectional maximum dimensions of flexible seals≤chamfering in the axial direction and rectangular channel radially depth e it
With, 2 outer diameter ＞ step groove internal diameters of flexible seals, after the first component 1 is assembled with second component 3 by connector 4, flexibility
2 outer diameter decrement of sealing element is the 1%~2% of free state.
The angle α angle of chamfering in the axial direction is 30 °~60 °, the right angle edge lengths b of chamfering in the axial direction for 4~
8mm。
Radially depth e is 0.2~0.3 times of in axial direction width c to rectangular channel, and rectangular channel root rounded corner is
The difference of R0.2~0.3mm, first component step groove depth and the right angle edge lengths b of second component chamfering in the axial direction >=
2mm ensures the integrality of integral seal structure, it is desirable that the second component insertion first component deep enough；Rectangular channel is square in an axial direction
Equal with the right angle edge lengths b of chamfering in the axial direction to width c, flexible seals (2) free state diameter of section d1 is less than
The angle α tangent value of chamfering in the axial direction and rectangular channel radially the sum of depth e, ensure that period of assembly sealing element can
Smoothly enter chamfer site, if d1 is oversized, sealing element is squeezed in first component step groove location.
Dotted line is the section under flexible seals free state in Fig. 2, and fine line is flexible sealing after sealing structure assembling
The inscribed circle diameter that part is compressed, is defined as d3, can pass through rectangle groove depth e, second component axis Leading end chamfer straight flange segment length
B and chamfering α is spent to represent.
Flexible seals section decrement design definition is ε, can be straight by inscribed circle diameter and flexible seals section
Diameter represents.It takes into account sealing performance, service life and assembling and is difficult to degree, flexible seals decrement ranging from 10%~30%.
The relative position with second component is adjusted after flexible seals and first component assembling together, for position is avoided to adjust
With the first component relative displacement or even torsion occur for flexible seals in the process, after flexible seals are assembled in structure design
Outer diameter decrement is controlled 1%~2%.
Effect 1, by sealed working face angle design, erection stress is decomposed into axially and radially both direction, with diameter
It is compared to sealing, under the conditions of much compression amount, radial normal stress is reduced to cos x times, and it is tired effectively to reduce sealing structure dismounting
Difficult degree.
Sealed working face angle value α design values are at 30 °~60 ° in the patent, compared with radial seal, in much compression amount
Under the conditions of, positive contact stress is reduced to
Effect 2, first component step slot shell root design rectangular groove structure are effectively increased flexible seals section and can set
The full-size of meter, under identical decrement, the increase of flexible seals sectional dimension can effectively improve axial assembling deviation wave
Integrally-built sealing performance in the case of dynamic range is larger.
For example, second component shaft end chamfering α angle values are 30 °, in the case of the b of falling straight flange values 5mm, if first component platform
Rank slot shell root is without rectangular groove structure, to realize sealing structure function, avoids installing in installation process not in place or even to close
Sealing causes failure by shear, then flexible seals diameter of section should be less than the product of b and tan α, i.e. sealing element diameter of section should be small
In 2.89mm.In flexible seals limited compression amount 10%, 0.289mm is compressed in sealing element section, if second component
With first component axial direction fit-up gap ＞ 0.289mm, then seal entirely ineffective.
However, under similarity condition, in first component step groove root, design width c values are 5mm, and depth e values are the square of 1mm
Shape slot structure, then the sealing element diameter of section that can be assembled in structure are relaxed to less than 3.89mm, equally compress 10%, then seal
By in the case of compression 0.389mm, Standard gap L T.LT.LT 0.389, sealing element is in compressive state in part section.It is rushed in annular seal space
Flexible seals have the condition of self-tightening sealing after pressure.
In conclusion first component step groove root rectangular groove structure can effectively improve sealing structure to axial assembly building
The adaptability of gap.And by the design of rectangle groove depth e, the control requirement of axial fit-up gap can be relaxed, so as to reduce
Cost.
The design of effect 3, flexible seals outer diameter decrement 1%~2% can effectively avoid first component adjustment and the
During two component relative positions, flexible seals occur misplacing or distorting in rectangular channel, are sealed after ensureing Standard
Working face is the chamfering working face of design.
Chamfering sealing structure demand easy to plug, from closing warehouse, the structure pair that rocket body tank equidimension is big, quality is heavy
The sealing of external tapping is only capable of completing assembling by adjusting the position of the first component.Flexible seals are initially introduced into rectangular channel, if
Sealing element is in free state, then easily misplaces during integrated regulation position, lead to seal failure.In flexible seals
In the case of diameter d2 ＜ 100mm, outer diameter decrement 1.5%~2%, sealing element can keep the relative position with groove.It is flexible close
In the case of sealing internal diameter d2 ＞ 100mm, outer diameter decrement 1%~1.5%, sealing element can keep uniformly patch with rectangular channel root
It closes, outer diameter decrement is excessively high, leads to fold after sealing element assembling, influences sealing effect.
Embodiment
A kind of chamfering sealing structure easy to plug first assembles flexible seals and the first component, by adjusting with second
Second component shaft end is inserted into first component step slot shell and is locked using connector by the relative position of part, forms annular seal space,
As shown in Figure 1.
By taking certain model oxygen pacifies valve sealing structure of overflowing as an example, 30 ° of chamfering α values, work-in parameters are shown in Table 1.
1 structural parameters of table
| Input parameter | Basic value mm | Maximum value mm | Minimum value mm |
| Axial fit-up gap | 0.275 | 0.55 | 0 |
| Valve body straight flange b | 4 | 4.1 | 4 |
| Blanking cover groove width c | 4 | 4.1 | 4 |
| Valve fixes shaft end diameter | 68 | 68 | 67.926 |
| Blanking cover trench inner diameter D | 69.5 | 69.54 | 69.48 |
| Radial clearance h | 0.75 | 0.807 | 0.74 |
It is calculated according to data in table, flexible seals cross-sectional maximum dimension ＜ 3.11mm, flexible seals after size rounding
Sectional dimension takes 3.0 ± 0.1mm.In structure size deviation, fit dimension precision be considered in, then design of Sealing Structure decrement
Fluctuation range is 11.86%~27.75%.
Period of assembly, sealing element are packed into after blanking cover (first component) and are assembled again with valve body (second component).To avoid
The problems such as sealing ring assembling retrotorsion, deformation, sealing ring is designed as outer ring compressed state, fixes tentatively the basic decrement x in outer ring
=1%, then internal diameter of the seal ring d1=64.20mm.It is by d1 roundingsOr 64.5 ± 0.4mm, to two kinds of internal diameters
Specification sealing ring outer diameter carries out limited compression amount calculating, is shown in Table 2.
2 sealing ring outer diameter decrement Limit Statistics of table
It is retried according to 2 dimension limit of table, determines that internal diameter of the seal ring should beIt is examined using the simpleness of standard helium
Leakage method, the sealing performance carried out to sealing structure under tri- pressure conditions of 0.11MPa, 0.22MPa and 0.33MPa are tested, examination
It tests and the results are shown in Table 3.
3 30 ° of chamfering sealing performance examination records of table
Accelerated ageing is carried out to the sealing structures of above-mentioned three kinds of decrements, accelerated ageing temperature is+70 DEG C, and the duration is
21 days, simulation storage life was 12 months.Using standard helium simpleness leak hunting method, sealing structure is carried out 0.11MPa,
Sealing performance test under tri- pressure conditions of 0.22MPa and 0.33MPa, result of the test are shown in Table 4.
4 accelerated aging test result of table
The utility model is not disclosed content and is known to the skilled person common sense.
Claims (10)
1. a kind of chamfering sealing structure easy to plug, which is characterized in that including the first component (1), flexible seals (2) and second
Part (3),
The first component (1) is revolving body, and the step groove coaxial with the first component (1) is provided in one end,
Second component (3) is revolving body, the boss coordinated with step groove is provided in one end, boss is placed in step groove, shape
Into annular seal space；
In the root of step groove, rectangular channel is radially provided with, in boss outer diameter end-beveling, flexible seals (2) are placed in rectangle
In the space that slot and chamfering surround, the sealing at step groove and boss to the first component (1) and second component (3) is realized.
2. a kind of chamfering sealing structure easy to plug as described in claim 1, which is characterized in that flexible seals (2) are volume
Incompressible elastomer, section decrement ranging from 10%~30%.
A kind of 3. chamfering sealing structure easy to plug as described in claim 1, which is characterized in that the angle of chamfering in the axial direction
α angles are 30 °~60 °.
A kind of 4. chamfering sealing structure easy to plug as described in claim 1, which is characterized in that the right angle of chamfering in the axial direction
Edge lengths b is 4~8mm.
A kind of 5. chamfering sealing structure easy to plug as described in claim 1, which is characterized in that rectangular channel radially depth
E is 0.2~0.3 times of in axial direction width c.
6. a kind of chamfering sealing structure easy to plug as described in claim 1, which is characterized in that rectangular channel root rounded corner is
R0.2~0.3mm.
A kind of 7. chamfering sealing structure easy to plug as described in claim 1, which is characterized in that the first component (1) step groove depth
Difference >=2mm of degree and the right angle edge lengths b of second component (3) chamfering in the axial direction.
A kind of 8. chamfering sealing structure easy to plug as described in claim 1, which is characterized in that rectangular channel in axial direction width
C is equal with the right angle edge lengths b of chamfering in the axial direction.
A kind of 9. chamfering sealing structure easy to plug as described in claim 1, which is characterized in that flexible seals (2) free shape
State diameter of section d1 is less than the angle α tangent value of chamfering in the axial direction and rectangular channel radially the sum of depth e.
10. a kind of chamfering sealing structure easy to plug as described in claim 1, which is characterized in that the first component (1) and second
After part (3) assembling, flexible seals (2) outer diameter decrement is the 1%~2% of free state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721642697.8U CN207598909U (en) | 2017-11-30 | 2017-11-30 | A kind of chamfering sealing structure easy to plug |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721642697.8U CN207598909U (en) | 2017-11-30 | 2017-11-30 | A kind of chamfering sealing structure easy to plug |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108930791A (en) * | 2018-07-26 | 2018-12-04 | 中国航发沈阳发动机研究所 | A kind of adjustable sealing structure |
| CN111917245A (en) * | 2020-08-03 | 2020-11-10 | 珠海格力电器股份有限公司 | Sealing structure, motor and machine tool |
| CN112179673A (en) * | 2020-09-17 | 2021-01-05 | 中国第一汽车股份有限公司 | Vehicle door dynamic sealing failure reason identification method based on size chain decomposition |
| CN114212276A (en) * | 2021-11-30 | 2022-03-22 | 北京卫星制造厂有限公司 | Space station cabin door and method for assembling and adjusting cabin door sealing structure |
-
2017
- 2017-11-30 CN CN201721642697.8U patent/CN207598909U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108930791A (en) * | 2018-07-26 | 2018-12-04 | 中国航发沈阳发动机研究所 | A kind of adjustable sealing structure |
| CN108930791B (en) * | 2018-07-26 | 2020-07-24 | 中国航发沈阳发动机研究所 | Adjustable seal structure |
| CN111917245A (en) * | 2020-08-03 | 2020-11-10 | 珠海格力电器股份有限公司 | Sealing structure, motor and machine tool |
| CN111917245B (en) * | 2020-08-03 | 2023-01-10 | 珠海格力电器股份有限公司 | Sealing structure, motor and machine tool |
| CN112179673A (en) * | 2020-09-17 | 2021-01-05 | 中国第一汽车股份有限公司 | Vehicle door dynamic sealing failure reason identification method based on size chain decomposition |
| CN114212276A (en) * | 2021-11-30 | 2022-03-22 | 北京卫星制造厂有限公司 | Space station cabin door and method for assembling and adjusting cabin door sealing structure |
| CN114212276B (en) * | 2021-11-30 | 2023-08-11 | 北京卫星制造厂有限公司 | Space station cabin door and assembling and adjusting method of cabin door sealing structure |
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