CN109944894A - Low temperature resistant air spring sub-mouth sealing structure, method and product - Google Patents
Low temperature resistant air spring sub-mouth sealing structure, method and product Download PDFInfo
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- CN109944894A CN109944894A CN201910353905.XA CN201910353905A CN109944894A CN 109944894 A CN109944894 A CN 109944894A CN 201910353905 A CN201910353905 A CN 201910353905A CN 109944894 A CN109944894 A CN 109944894A
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- 238000007789 sealing Methods 0.000 title claims abstract description 111
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000006073 displacement reaction Methods 0.000 claims abstract description 18
- 230000013011 mating Effects 0.000 claims description 40
- 230000006835 compression Effects 0.000 claims description 22
- 238000007906 compression Methods 0.000 claims description 22
- 230000015572 biosynthetic process Effects 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000007373 indentation Methods 0.000 claims 1
- 230000000630 rising effect Effects 0.000 claims 1
- 229920001971 elastomer Polymers 0.000 description 25
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000002457 bidirectional effect Effects 0.000 description 4
- 229920002379 silicone rubber Polymers 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 239000003292 glue Substances 0.000 description 2
- 230000002929 anti-fatigue Effects 0.000 description 1
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Abstract
Low temperature resistant air spring sub-mouth sealing structure, including upper cover plate, retaining ring, connect bolt and upper rim of the mouth, upper rim of the mouth is compressed between upper cover plate and retaining ring, retaining ring and connection bolt are arranged at the radial outside in rim of the mouth, utricule below upper rim of the mouth, which is bonded with retaining ring inner wall and carries over downwards, conforms to retaining ring bottom surface, it is all made of radial seal between upper cover plate and upper rim of the mouth and between upper rim of the mouth and retaining ring and axial seal is arranged alternately and sequentially connected sealing structure, at least one axial seal is in face of the sealed pressure of upper cover plate towards far from the interior direction for connecting bolt on upper rim of the mouth, and its sealed pressure and decrement increase with the loaded of air spring and displacement.The present invention guarantees the sealing reliability in rim of the mouth on loaded air spring in the process, and effective sealing of the rim of the mouth under low-temperature condition in realization meets the seal request of air spring under low-temperature condition.The present invention also provides a kind of low temperature resistant air spring sub-mouth sealing method and low temperature resistant air springs.
Description
Technical field
The present invention relates to a kind of low temperature resistant air spring sub-mouth sealing structure, method and product, realize that air spring exists
Effective sealing under low-temperature condition.
Background technique
Air spring for rail traffic sub-mouth sealing mainly passes through a certain number of spiral shells by by the upper rim of the mouth of air bag
Nail is fixed between upper cover plate and retaining ring.Reach rim of the mouth rubber on compressing gasbag by the screwing force of screw application
Purpose, to realize the sealing performance in rim of the mouth on air bag.
With the development of track transportation industry, air spring product is also more and more for various extremely frigid zones, but by
Under low temperature psychro-environment, the rubber of air-spring bellows can be caused rim of the mouth on air spring to seal in upper cover plate by cold events
Decrement reduces at face, and especially in the case where air bag is by big load and horizontal displacement, rim of the mouth is in upper cover plate on air spring
The leakage problem of sealing surface is very universal.Usual way is to improve rubber compounding, and reduce rubber performance is influenced by low temperature, still
- 50 DEG C of low temperature once, simple improvement air-spring bellows rubber can not solve low temperature leakage problem, need to cooperate use
Design new sealing structure.
CN201610103238, by the hourglass spring upper design emergency spring inside empty spring, by emergency spring with
The concatenated mode of hourglass spring reduces rigidity, and devises limit pressing plate and solve routine to play the ability of limitation lateral displacement
Air spring the problem of rigidity becomes larger at low temperature, but the patent does not refer to how solving air spring in high and cold low temperature ring
The problem in rim of the mouth and gas leakage at upper cover plate on the lower gasbag of border.
CN201420499038 discloses a kind of high and cold vehicle air spring system, for the scheme of upper rim of the mouth low temperature gas leakage
It is the sealing bar that similar O-ring is designed by the upper surface in the rim of the mouth on air bag.Sealing bar quantity is 2-4 circle, sealing bar size
For 1.5-3mm, but sealing bar is simply by the decrement for increasing up and down direction by sealing bar, to solve -40 DEG C of low temperature
Leakage problem caused by lower rubber is shunk, still identical with regular air spring at upper cover plate cooperation, only one sealing is flat
Face, scheme can not solve at lower temperatures, rubber creep and the problem of after contraction, plane leaks air at this.
WO2015/139854A1 places a silicon rubber O-ring by the outside at upper cover plate and air bag cooperation, benefit
With the low temperature tolerance characteristics of silicon rubber, the air-tightness of air spring under Lai Shixian low temperature.The program requires to connect on the outside of air bag with screw
The place of connecing needs biggish space to place silicon rubber O-ring.For narrow with screw connection size on the outside of air bag, space is tight
, O-ring can not be placed, then can not solve the problems, such as low temperature gas leakage.
CN106641079A, compressing air bag sub-mouth sealing circle using upper cover plate and retaining ring makes air bag sub-mouth sealing circle shape
It is compressed at interference, to realize the sealing in rim of the mouth on air bag.The program, which is increased only, is in the close of same surface with former sealing surface
Seal, the but the phenomenon that creep that can not solve the rubber of air bag and body rubber are by cold events, using one section when after air
Rim of the mouth decrement at upper cover plate sealing surface reduces the problem of there may be gas leakage on spring, and the program is also required on the outside of air bag
Biggish space is needed with screw connection to place sub-mouth sealing circle.
Summary of the invention
Low temperature resistant air spring sub-mouth sealing structure provided by the invention, the sealing in promotion between rim of the mouth and upper cover plate
Performance guarantees the sealing reliability in rim of the mouth on loaded air spring in the process；Rim of the mouth is effective close under low-temperature condition in realization
Envelope counteracts the influence that sealed pressure caused by being shunk under low temperature due to rubber is reduced, meets air spring under low-temperature condition
Seal request improves sealing reliability and use reliability of the air spring under low-temperature condition.The present invention also provides a kind of resistance to
Cryogenic air spring sub-mouth sealing method and low temperature resistant air spring.
In order to achieve the above objectives, the technical solution adopted by the present invention is that:
Low temperature resistant air spring sub-mouth sealing structure, including upper cover plate, be close to upper cover plate bottom surface retaining ring, connection upper cover plate and
The upper rim of the mouth of the connection bolt and air bag of retaining ring, upper rim of the mouth are compressed between upper cover plate and retaining ring, and retaining ring and connection bolt are all provided with
The radial outside in upper rim of the mouth is set, the utricule below upper rim of the mouth, which is bonded with retaining ring inner wall and carries over downwards, conforms to retaining ring bottom surface,
It is characterized in that being all made of radial seal and axial close between the upper cover plate and upper rim of the mouth and between upper rim of the mouth and retaining ring
Envelope is arranged alternately and sequentially connected sealing structure, at least one axial seal faces the sealed pressure court of upper cover plate on upper rim of the mouth
Interior direction far from connection bolt, and its sealed pressure and decrement increase with the loaded of air spring and displacement.
Preferably, there is the retaining ring groove of annular and the retaining ring protrusion on the inside of retaining ring groove on the retaining ring, on
Rim of the mouth bottom has bottom protrusion corresponding with retaining ring groove and bottom groove corresponding with retaining ring protrusion；
Bottom protrusion is pressed into retaining ring groove, and bottom protrusion side is bonded compression with retaining ring groove side, rim of the mouth and button in formation
Axial seal between ring, the bottom surface of bottom protrusion are bonded compression with retaining ring convex-concave groove bottom, in formation between rim of the mouth and retaining ring
Radial seal；
Retaining ring protrusion be pressed into bottom groove in, the side of retaining ring protrusion is bonded compression with bottom groove side, in formation rim of the mouth and
Axial seal between retaining ring, the top surface of retaining ring protrusion are bonded compression with the top surface of bottom groove, in formation between rim of the mouth and retaining ring
Radial seal.
Preferably, the bottom surface of the bottom protrusion is sagittal plane, and the top surface of bottom groove is arc surface, and bottom is convex
The radial width risen is two to three times of bottom groove radial width.
Preferably, the upper rim of the mouth top surface have the radial sealing surfaces cooperated with upper cover plate bottom surface radial seal and with it is upper
The axial seal face of cover board bottom surface axial seal cooperation, upper cover plate bottom surface have the radial seal with radial sealing surfaces palette
Mating surface and axial seal mating surface with axial seal face palette, radial sealing surfaces and axial seal face be arranged alternately and
It is sequentially connected, the quantity in axial seal face is at least one, and the quantity of radial sealing surfaces is at least two, at least one is axial close
Cover is to the sealed pressure of axial seal mating surface towards far from the interior direction for connecting bolt.
Preferably, the quantity of the radial mating surface is two, and one axially engages face and is arranged in two radial fits
Between face, the height that the radial mating surface on the inside of the face of axially engaging is arranged in is lower than the radial direction being arranged on the outside of the face of axially engaging and matches
The height in conjunction face axially engages face and connect to form top surface protrusion with the radial mating surface being arranged on the outside of the face of axially engaging, axial
Sealing mating surface connect the upper cover plate groove to be formed and be matched with top surface protrusion with radial seal mating surface, and top surface protrusion is in upper cover
Axial compression amount in plate groove is greater than 1mm.
Preferably, there is elevated temperature deformation gap I, the elevated temperature deformation between top surface protrusion and upper cover plate groove
Gap has elevated temperature deformation gap between upper rim of the mouth lateral wall and the side wall of upper cover plate groove between upper rim of the mouth and retaining ring
II, elevated temperature deformation gap II is between upper rim of the mouth lateral wall and retaining ring groove lateral wall, and elevated temperature deformation gap I and heating become
About II connection of shape gap and width is equal.
Preferably, the axially engage face and the quantity of axial seal mating surface are two, and two axially engage face
Between one radial mating surface of connection form top surface protrusion, one radial seal cooperation of connection between two axial seal mating surfaces
Face forms upper cover plate groove, is arranged between upper cover ring and retaining ring along the elevated temperature deformation gap III for extending to rim of the mouth lateral surface.
Preferably, the internal diameter of the retaining ring groove be greater than upper cover plate groove internal diameter, the outer diameter of retaining ring groove be equal to or
Greater than the outer diameter of upper cover plate groove, the depth of upper cover plate groove is 2-5mm.
Low temperature resistant air spring sub-mouth sealing method, using above-described low temperature resistant air spring sub-mouth sealing knot
Structure, it is characterised in that:
Upper rim of the mouth is carried out radial and axial by the sealing structure between upper cover plate and upper rim of the mouth and between upper rim of the mouth and retaining ring
Alternating sealing；
When air spring is loaded and is displaced, upper openning is pullled towards the interior direction far from connection bolt, towards far from even on upper rim of the mouth
The axial seal that the interior direction of connecting bolt applies sealed pressure increases in face of the sealed pressure and decrement of upper cover plate, to mention
Go up the sealing performance between rim of the mouth and upper cover plate；
Decrement of the rim of the mouth between upper cover plate and retaining ring in design makes the receipts that are cooled in air spring upper rim of the mouth under low-temperature condition
Contracting amount is less than the axial compression amount in upper rim of the mouth, keeps the radial seal in upper rim of the mouth under low-temperature condition；
The axial compression amount in upper rim of the mouth is reduced under low-temperature condition, and upper rim of the mouth is towards far from connection when causing air spring loaded and displacement
The interior direction of screw pulls deflection increase, makes to apply sealed pressure towards the interior direction far from connection bolt on rim of the mouth
Axial seal increase therewith in face of the sealed pressure and decrement of upper cover plate, keep the axial direction in upper rim of the mouth under low-temperature condition close
It seals, effective sealing of the rim of the mouth under low-temperature condition in realization.
Low temperature resistant air spring, the connection including upper cover plate, the retaining ring of abutting upper cover plate bottom surface, connection upper cover plate and retaining ring
The upper rim of the mouth of bolt and air bag, air bag is compressed between upper cover plate and retaining ring, and retaining ring and connection bolt are arranged at rim of the mouth
Radial outside, the utricule below upper rim of the mouth, which is bonded with retaining ring inner wall and carries over downwards, conforms to retaining ring bottom surface, it is characterised in that institute
The sealing structure in the upper rim of the mouth stated is using claim to described in any item low temperature resistant air spring sub-mouth sealing structures.
Advantageous effect of the invention is:
Radial seal is all made of in the present invention between upper cover plate and upper rim of the mouth and between upper rim of the mouth and retaining ring and axial seal is handed over
For setting and sequentially connected sealing structure, the top and bottom that air spring goes up rim of the mouth in the deflated condition pass through radial close
Envelope and the Bidirectional seal structure of axial seal are sealed, and sealing effect is more preferable.
In loaded and displacement, air bag is outside and deforms downwards air spring, since retaining ring and connection bolt are all provided with
Set the radial outside in upper rim of the mouth, lead to rim of the mouth inwardly and pull downwards, thus in air bag deformation process upper rim of the mouth towards separate
The interior direction of connection bolt is pullled, and the sealed pressure by least one axial seal on upper rim of the mouth in face of upper cover plate is designed as court
Interior direction far from connection bolt, when being pullled when upper openning towards the interior direction far from connection bolt, towards separate on upper rim of the mouth
The interior direction for connecting bolt applies sealed pressure increase of the axial seal in face of upper cover plate of sealed pressure, makes this axial seal
The decrement in face is also synchronous to be increased, so the sealed pressure and decrement in this axial seal face are with the loaded of air spring and displacement
And increase, to promote the sealing performance between upper rim of the mouth and upper cover plate, rim of the mouth is close on the loaded air spring in the process of guarantee
Seal reliability.
According to the requirement of air spring sub-mouth sealing under low-temperature condition and upper rim of the mouth at low ambient temperatures by cold events
It measures, decrement of the rim of the mouth between upper cover plate and retaining ring in design, makes the receipts that are cooled in air spring upper rim of the mouth under low-temperature condition
Contracting amount is less than the axial compression amount in upper rim of the mouth, the radial seal in upper rim of the mouth under low-temperature condition is kept, due to rubber under low-temperature condition
Glue is shunk and creep fatigue, and rubber is more easily-deformable, will lead to when loaded air spring and displacement upper rim of the mouth towards far from attachment screw
Interior direction pull deflection increase, make on rim of the mouth towards far from connection bolt interior direction apply sealed pressure axis
Increase therewith to sealed pressure and decrement of the sealing surface to upper cover plate, so that the axial seal in upper rim of the mouth is kept, son in realization
Effective sealing of the mouth under low-temperature condition counteracts the influence that sealed pressure caused by being shunk under low temperature due to rubber is reduced, full
It is reliable to improve sealing reliability and use of the air spring under low-temperature condition for the seal request of air spring under sufficient low-temperature condition
Property.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of low temperature resistant air spring sub-mouth sealing structure in embodiment one.
Fig. 2 is the structural schematic diagram of upper cover plate in Fig. 1.
Fig. 3 is the structural schematic diagram in upper rim of the mouth in Fig. 1.
Fig. 4 is the structural schematic diagram of low temperature resistant air spring sub-mouth sealing structure in embodiment two.
Fig. 5 is the sectional view of latch closure.
Fig. 6 is the structural schematic diagram of low temperature resistant air spring of the invention.
Specific embodiment
It elaborates below with reference to Fig. 1 to Fig. 6 to the embodiment of the present invention.
Embodiment one:
Low temperature resistant air spring sub-mouth sealing structure, including upper cover plate 1, the retaining ring 2 of abutting 1 bottom surface of upper cover plate, connection upper cover
The upper rim of the mouth 4 of the connection bolt 3 and air bag of plate 1 and retaining ring 2, upper rim of the mouth 4 are compressed between upper cover plate 1 and retaining ring 2,2 He of retaining ring
Connection bolt 3 is arranged at the radial outside in rim of the mouth 4, and the utricule 100 of upper 4 lower section of rim of the mouth is bonded and downward with 2 inner wall of retaining ring
Carry over and conform to 2 bottom surface of retaining ring, it is characterised in that between the upper cover plate 1 and upper rim of the mouth 4 and upper rim of the mouth 4 and retaining ring 2 it
Between be all made of radial seal and axial seal is arranged alternately and sequentially connected sealing structure, at least one axial direction on upper rim of the mouth 4
Sealing surface is to the sealed pressure of upper cover plate 1 towards the interior direction far from connection bolt 3, and its sealed pressure and decrement are with air
The loaded of spring increases with displacement.
In above-described low temperature resistant air spring sub-mouth sealing structure between upper cover plate 1 and upper rim of the mouth 4 and upper son
Radial seal is all made of between mouth 4 and retaining ring 2 and axial seal is arranged alternately and sequentially connected sealing structure, air spring exist
The top and bottom in upper rim of the mouth 4 pass through radial seal under inflated condition and the Bidirectional seal structure of axial seal is sealed,
Sealing effect is more preferable.
In loaded and displacement, air bag 100 is outside and deforms downwards air spring, i.e. the direction E in Fig. 1 causes
Upper rim of the mouth is inside and pulls downwards, i.e. the direction F in Fig. 1, since the diameter that retaining ring and connection bolt are arranged at upper rim of the mouth is outside
The stress of side, air bag 100 is as shown in Figure 1, from the direction F of upper 4 position of rim of the mouth, carries over utricule to the direction E, therefore air bag becomes
It is pullled towards the interior direction far from connection bolt 3 for 4 mouthfuls of upper son during shape, at least one axial seal on upper rim of the mouth 4 is faced
The sealed pressure of upper cover plate is designed as towards the interior direction far from connection bolt, when upper openning towards the interior side far from connection bolt
To when pullling, apply the axial seal of sealed pressure in face of upper cover plate towards the interior direction far from connection bolt on upper rim of the mouth 4
Sealed pressure increases, and makes the decrement in this axial seal face is also synchronous to increase, so the sealed pressure and pressure in this axial seal face
Contracting amount increases with the loaded of air spring and displacement, to promote the sealing performance between upper rim of the mouth 4 and upper cover plate 1, guarantees
The sealing reliability in rim of the mouth on loaded air spring in the process.
According to the requirement of air spring sub-mouth sealing under low-temperature condition and upper rim of the mouth at low ambient temperatures by cold events
It measures, decrement of the rim of the mouth between upper cover plate and retaining ring in design, makes the receipts that are cooled in air spring upper rim of the mouth under low-temperature condition
Contracting amount is less than the axial compression amount in upper rim of the mouth, the radial seal in upper rim of the mouth under low-temperature condition is kept, due to rubber under low-temperature condition
Glue is shunk and creep fatigue, and rubber is more easily-deformable, will lead to when loaded air spring and displacement upper rim of the mouth towards far from attachment screw
Interior direction pull deflection increase, make on rim of the mouth towards far from connection bolt interior direction apply sealed pressure axis
To sealing surface, i.e. the axial seal face to exert a force in Fig. 1 towards the direction F, sealed pressure and decrement to upper cover plate increase therewith, from
And the axial seal in upper rim of the mouth is kept, effective sealing of the rim of the mouth under low-temperature condition in realization counteracts under low temperature due to rubber
The influence that sealed pressure caused by shrinking reduces meets the seal request of air spring under low-temperature condition, improves air spring and exists
Sealing reliability and use reliability under low-temperature condition.
Wherein, there is the retaining ring groove 21 of annular and the retaining ring protrusion positioned at 21 inside of retaining ring groove on the retaining ring 2
22, upper 4 bottom of rim of the mouth has bottom protrusion 41 corresponding with retaining ring groove 21 and recessed with the raised 22 corresponding bottoms of retaining ring
Slot 42；
Bottom protrusion 41 is pressed into retaining ring groove 21, and 41 side of bottom protrusion is bonded compression with 21 side of retaining ring groove, in formation
Axial seal between rim of the mouth 4 and retaining ring 2, the bottom surface of bottom protrusion 41 are bonded compression with 21 bottom surface of retaining ring convex-concave slot, in formation
Radial seal between rim of the mouth 4 and retaining ring 2；
Retaining ring protrusion 22 is pressed into bottom groove 42, and the side of retaining ring protrusion 22 is bonded compression with 42 side of bottom groove, is formed
Axial seal between upper rim of the mouth 4 and retaining ring 2, the top surface of retaining ring protrusion 22 are bonded compression with the top surface of bottom groove 42, in formation
Radial seal between rim of the mouth 4 and retaining ring 2.
As shown, retaining ring groove 21 and the retaining ring protrusion 22 positioned at 21 inside of retaining ring groove are set on retaining ring 2, bumps knot
Structure is set gradually, the bottom protrusion 41 that upper 4 floor design of rim of the mouth and retaining ring groove 21 cooperate, and cooperate with retaining ring protrusion 22
Bottom groove 42 forms double concave-convex fit structures between retaining ring 2 and upper rim of the mouth 4, realizes that the radial direction between retaining ring 2 and upper rim of the mouth is close
The Bidirectional seal structure of envelope and axial seal, sealing effect are good.
Wherein, the bottom surface of the bottom protrusion 41 is sagittal plane, and the top surface of bottom groove 42 is arc surface, and bottom
The radial width of protrusion 41 is two to three times of 42 radial width of bottom groove, more favorably when connection bolt 3 screws, in realization
The homogeneous compaction in rim of the mouth avoids the elastic compression force of retaining ring 2 or upper cover plate 1 at upper rim of the mouth from being unevenly distributed and deform or loosen.
Wherein, 4 top surface of upper rim of the mouth have the radial sealing surfaces 43 that cooperate with 1 bottom surface radial seal of upper cover plate and with
The axial seal face 44 of 1 bottom surface axial seal of upper cover plate cooperation, 1 bottom surface of upper cover plate have and 43 palette of radial sealing surfaces
Radial seal mating surface 11 and axial seal mating surface 12 with 44 palette of axial seal face, radial sealing surfaces 43 and axial
Sealing surface 44 is arranged alternately and is sequentially connected, from figure 1 it appears that the quantity of the radial mating surface 43 is two, position
In inside axial seal face 44 to the sealed pressure of axial seal mating surface 12 towards the interior direction far from connection bolt 3, axis
Quantity to sealing mating surface 12 is also two, and two axially engage one radial mating surface 43 of connection between face 44 and form top surface
Protrusion 45, one radial seal mating surface 11 of connection forms upper cover plate groove 13, upper cover between two axial seal mating surfaces 12
It is arranged between ring 1 and retaining ring 2 along the elevated temperature deformation gap III 7 for extending to 4 lateral surface of rim of the mouth, top surface protrusion 45 is in upper cover plate groove
Axial compression amount in 13 is greater than 1mm.
In loaded and displacement, air bag 100 is outside and deforms downwards air spring, as shown in Figure 1, axis in the inner part
Power is pullled by the direction F to sealing surface 44, i.e., the axial seal face 44 is to the sealed pressure of axial seal mating surface 12 towards separate
Interior direction, that is, the direction F for connecting bolt 3 increases, and makes the decrement in the axial seal face 44 is also synchronous to increase, so this axial direction
The sealed pressure and decrement of sealing surface increase with the loaded of air spring and displacement, to promote upper rim of the mouth 4 and upper cover plate 1
Between sealing performance, guarantee it is loaded during on air spring rim of the mouth sealing reliability.According to air bullet under low-temperature condition
The shrinkage that is cooled of the requirement of spring sub-mouth sealing and upper rim of the mouth at low ambient temperatures, in design rim of the mouth upper cover plate and retaining ring it
Between decrement, make the shrinkage that is cooled of air spring top surface protrusion 45 under low-temperature condition less than axial compression amount, keep top
Compression of the face protrusion 45 in upper cover plate groove 13, so that radial seal is kept, since rubber is shunk and compacted under low-temperature condition
Weaken labor, and rubber is more easily-deformable, i.e., upper rim of the mouth is easier to be pullled deformation, upper rim of the mouth court when causing air spring loaded and displacement
Interior direction far from attachment screw pulls deflection increase, makes axial seal face in the inner part 44 to axial seal mating surface
12 sealed pressure and decrement increases therewith, to keep axial seal, rim of the mouth is effective close under low-temperature condition in realization
Envelope counteracts the influence that sealed pressure caused by being shunk under low temperature due to rubber is reduced, meets air spring under low-temperature condition
Seal request improves sealing reliability and use reliability of the air spring under low-temperature condition.Elevated temperature deformation gap III 7 is used for
The dilatancy of upper 4 rubber of rim of the mouth flows under the condition of high temperature, and the anti-fatigue performance of rim of the mouth rubber, prolongs the service life in raising.
Wherein, the internal diameter of the retaining ring groove 21 is greater than the internal diameter of upper cover plate groove 13, the outer diameter etc. of retaining ring groove 21
In or greater than upper cover plate groove 13 outer diameter, determined convenient for the position of upper cover groove 13, the depth of upper cover plate groove 13 is 2-
5mm.Guarantee that top surface protrusion 45 has enough decrements in upper cover plate groove 13, to guarantee upper rim of the mouth under low-temperature condition
Sealing performance.
Embodiment two:
With apply Shi Liyi the difference is that, the quantity of axial mating surface 44 is one in upper rim of the mouth 4, this axially engages face 44
It is arranged between two radial mating surfaces 4, the height that setting axially engages the radial mating surface 43 of 44 inside of face herein, which is lower than, to be set
The height for axially engaging the radial mating surface 43 in 44 outside of face herein is set, this axially engages face 44 and setting axially engages face herein
The connection of radial mating surface 43 in 44 outsides forms top surface protrusion 45, and axial seal mating surface 12 is connect with radial seal mating surface 11
The upper cover plate groove 13 matched with top surface protrusion 45 is formed, has between the top surface protrusion 45 and upper cover plate groove 13 and rises
Warm deformation gap I 5, the elevated temperature deformation gap 5 between upper 4 lateral wall of rim of the mouth and the side wall of upper cover plate groove 13, on
There is elevated temperature deformation gap II 6, elevated temperature deformation gap II 6 is located at upper 4 lateral wall of rim of the mouth and retaining ring is recessed between rim of the mouth 4 and retaining ring 2
Between 21 lateral wall of slot, and elevated temperature deformation gap I 5 is equal with about II 6 connection of elevated temperature deformation gap and width.In this embodiment
Sealed pressure direction is eliminated not towards the axial seal face of the interior direction far from connection bolt 3, passes through a sealed pressure court
The axial seal face of interior direction far from connection bolt 3, it can reach and improve sub-mouth sealing reliability, counteract low temperature
Under due to rubber shrink caused by sealed pressure reduce influence, meet the effect of the seal request of air spring under low-temperature condition
Fruit, structure is simpler, and elevated temperature deformation gap I 5 is equal with about II 6 connection of elevated temperature deformation gap, width, and on being set up directly on
Between rim of the mouth lateral wall and retaining ring 2 and upper cover plate 1, the dilatancy flowing of upper rim of the mouth rubber is easier under the condition of high temperature, is deformed
Restore simpler, is more advantageous to the fatigue life for extending upper rim of the mouth rubber, the service life of rim of the mouth rubber in raising.
The present invention also protects a kind of low temperature resistant air spring sub-mouth sealing method, using above-described low temperature resistant air
Spring sub-mouth sealing structure, it is characterised in that:
Upper rim of the mouth 4 by sealing structure between upper cover plate 1 and upper rim of the mouth 4 and between upper rim of the mouth 4 and retaining ring 2 carry out it is radial with
Axial alternating sealing；
When air spring is loaded and is displaced, upper openning 4 is pullled towards the interior direction far from connection bolt 3, towards separate on upper rim of the mouth 4
The interior direction for connecting bolt 3 applies sealed pressure and decrement increase of the axial seal in face of upper cover plate 1 of sealed pressure, from
And promote the sealing performance between upper rim of the mouth 4 and upper cover plate 1；
Decrement of the rim of the mouth 4 between upper cover plate 1 and retaining ring 2 in design, make air spring under low-temperature condition upper rim of the mouth 4 by
Cold events amount is less than the axial compression amount in upper rim of the mouth 4, keeps the radial seal in upper rim of the mouth 4 under low-temperature condition；
The axial compression amount in upper rim of the mouth 4 is reduced under low-temperature condition, and upper rim of the mouth 4 is towards far from even when causing air spring loaded and displacement
Connect the interior direction of screw 3 pulls deflection increase, makes close towards the interior direction application far from connection bolt 3 on rim of the mouth 4
The axial seal of seal pressure increases therewith in face of the sealed pressure and decrement of upper cover plate 1, keeps upper rim of the mouth 4 under low-temperature condition
Axial seal, effective sealing of the rim of the mouth 4 under low-temperature condition in realization.
The present invention also protects a kind of low temperature resistant air spring, including upper cover plate 1, the retaining ring 2 of abutting 1 bottom surface of upper cover plate, company
The connection bolt 3 and air bag of cover board 1 and retaining ring 2 are connected, the upper rim of the mouth 4 of air bag is compressed between upper cover plate 1 and retaining ring 2, retaining ring 2
The radial outside in upper rim of the mouth 4 is arranged at connection bolt 3, the utricule of upper 4 lower section of rim of the mouth is bonded simultaneously suitable downwards with 2 inner wall of retaining ring
Edge conforms to 2 bottom surface of retaining ring, it is characterised in that the sealing structure in the upper rim of the mouth 4 uses above-described low temperature resistant air bullet
Spring sub-mouth sealing structure.
Above-described low temperature resistant air spring, the top and bottom in upper rim of the mouth pass through radial seal in the deflated condition
It is sealed with the Bidirectional seal structure of axial seal, sealing effect is more preferable.Rim of the mouth is effective close under low-temperature condition in realization
Envelope counteracts the influence that sealed pressure caused by being shunk under low temperature due to rubber is reduced, meets air spring under low-temperature condition
Seal request improves sealing reliability and use reliability of the air spring under low-temperature condition.
It is completely described in conjunction with technical solution of the attached drawing to the embodiment of the present invention above, it should be noted that described
Embodiment be only a part of the embodiments of the present invention.Based on the embodiments of the present invention, those of ordinary skill in the art exist
Every other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
Claims (10)
1. low temperature resistant air spring sub-mouth sealing structure, including upper cover plate (1), the retaining ring (2) of being close to upper cover plate (1) bottom surface,
The connection bolt (3) of upper cover plate (1) and retaining ring (2) and the upper rim of the mouth (4) of air bag are connected, upper rim of the mouth (4) is compressed in upper cover plate (1)
Between retaining ring (2), retaining ring (2) and connection bolt (3) are arranged at the radial outsides of rim of the mouth (4), below upper rim of the mouth (4)
Utricule, which is bonded with retaining ring (2) inner wall and carries over downwards, conforms to retaining ring (2) bottom surface, it is characterised in that the upper cover plate (1) with
It is all made of radial seal between upper rim of the mouth (4) and between upper rim of the mouth (4) and retaining ring (2) and axial seal is arranged alternately and successively
The sealing structure of connection, at least one axial seal is in face of the sealed pressure of upper cover plate (1) towards far from connection spiral shell on upper rim of the mouth (4)
The interior direction of bolt (3), and its sealed pressure and decrement increase with the loaded of air spring and displacement.
2. low temperature resistant air spring sub-mouth sealing structure according to claim 1, it is characterised in that the retaining ring (2)
The upper retaining ring groove (21) with annular and the retaining ring on the inside of retaining ring groove (21) are raised (22), upper rim of the mouth (4) bottom tool
There are bottom protrusion (41) corresponding with retaining ring groove (21) and bottom groove (42) corresponding with retaining ring raised (22)；
Bottom protrusion (41) is pressed into retaining ring groove (21), and bottom protrusion (41) side is bonded pressure with retaining ring groove (21) side
Tightly, the axial seal in formation between rim of the mouth (4) and retaining ring (2), the bottom surface and retaining ring convex-concave slot (21) bottom of bottom protrusion (41)
Face paste combined pressure is tight, the radial seal in formation between rim of the mouth (4) and retaining ring (2)；
In retaining ring protrusion (22) indentation bottom groove (42), the side of retaining ring protrusion (22) is bonded pressure with bottom groove (42) side
Tightly, axial seal between rim of the mouth (4) and retaining ring (2) in formation, the top surface of retaining ring protrusion (22) and the top surface of bottom groove (42)
Fitting compresses, the radial seal in formation between rim of the mouth (4) and retaining ring (2).
3. resistance to low latitude gas spring sub-mouth sealing structure according to claim 2, it is characterised in that the bottom protrusion
(41) bottom surface is sagittal plane, and the top surface of bottom groove (42) is arc surface, and the radial width of bottom protrusion (41) is bottom
Two to three times of portion's groove (42) radial width.
4. low temperature resistant air spring sub-mouth sealing structure according to claim 2, it is characterised in that the upper rim of the mouth
(4) top surface has radial sealing surfaces (43) cooperated with upper cover plate (1) bottom surface radial seal and axially close with upper cover plate (1) bottom surface
The axial seal face (44) of cooperation is sealed, there is the radial seal with radial sealing surfaces (43) palette to match for upper cover plate (1) bottom surface
Conjunction face (11) and axial seal mating surface (12) with axial seal face (44) palette, radial sealing surfaces (43) and axial close
Cover (44) is arranged alternately and is sequentially connected, and the quantity of axial seal face (44) is at least one, the number of radial sealing surfaces (43)
Amount is at least two, at least one axial seal face (44) is to the sealed pressure of axial seal mating surface (12) towards far from connection spiral shell
The interior direction of bolt (3).
5. low temperature resistant air spring sub-mouth sealing structure according to claim 4, it is characterised in that the radial direction is matched
The quantity in conjunction face (43) is two, and one axially engages face (44) and is arranged between two radial mating surfaces (43), is arranged in axis
To the height of the radial mating surface (43) on the inside of mating surface (44) lower than the radial fit being arranged on the outside of the face that axially engages (44)
The height in face (43) axially engages face (44) with the radial mating surface (43) being arranged on the outside of the face that axially engages (44) and connect formation
Top surface protrusion (45), axial seal mating surface (12) connect formation with radial seal mating surface (11) and match with top surface raised (45)
The upper cover plate groove (13) of conjunction, axial compression amount of the top surface protrusion (45) in upper cover plate groove (13) are greater than 1mm.
6. low temperature resistant air spring sub-mouth sealing structure according to claim 5, it is characterised in that the top surface is convex
Rising has elevated temperature deformation gap I (5) between (45) and upper cover plate groove (13), the elevated temperature deformation gap (5) is located at upper son
Between mouth (4) lateral wall and the side wall of upper cover plate groove (13), there is elevated temperature deformation gap between upper rim of the mouth (4) and retaining ring (2)
II (6), elevated temperature deformation gap II (6) is located between upper rim of the mouth (4) lateral wall and retaining ring groove (21) lateral wall, and elevated temperature deformation
Gap I (5) and elevated temperature deformation gap II (6) connection and width is equal up and down.
7. low temperature resistant air spring sub-mouth sealing structure according to claim 5, it is characterised in that the axial direction is matched
The quantity of conjunction face (44) and axial seal mating surface (12) is two, and two axially engage one radial direction of connection between face (44)
Mating surface (43) forms top surface protrusion (45), connects a radial seal mating surface between two axial seal mating surfaces (12)
(11) upper cover plate groove (13) are formed, be arranged between upper cover ring (1) and retaining ring (2) along the heating for extending to rim of the mouth (4) lateral surface
It deforms gap III (7).
8. low temperature resistant air spring sub-mouth sealing structure according to claim 6, it is characterised in that the retaining ring is recessed
The internal diameter of slot (21) is greater than the internal diameter of upper cover plate groove (13), and the outer diameter of retaining ring groove (21) is equal to or more than upper cover plate groove
(13) outer diameter, the depth of upper cover plate groove (13) are 2-5mm.
9. low temperature resistant air spring sub-mouth sealing method, using the described in any item low temperature resistant air springs of claim 1 to 8
Sub-mouth sealing structure, it is characterised in that:
Upper rim of the mouth (4) passes through the sealing structure between upper cover plate (1) and upper rim of the mouth (4) and between upper rim of the mouth (4) and retaining ring (2)
It carries out radial direction and replaces sealing with axial；
When air spring is loaded and is displaced, upper openning (4) is pullled towards the interior direction far from connection bolt (3), on upper rim of the mouth (4)
The axial seal for applying sealed pressure towards the interior direction far from connection bolt (3) faces the sealed pressure and pressure of upper cover plate (1)
Contracting amount increases, to promote the sealing performance between upper rim of the mouth (4) and upper cover plate (1)；
The decrement of rim of the mouth (4) between upper cover plate (1) and retaining ring (2) in design makes air spring upper son under low-temperature condition
The shrinkage that is cooled of mouth (4) is less than the axial compression amount of upper rim of the mouth (4), keeps the radial seal of rim of the mouth (4) upper under low-temperature condition；
The axial compression amount of upper rim of the mouth (4) is reduced under low-temperature condition, and upper rim of the mouth (4) are towards remote when causing air spring loaded and displacement
The deflection of pullling of interior direction from attachment screw (3) increases, and makes on rim of the mouth (4) towards the inside far from connection bolt (3)
Direction applies sealed pressure and decrement of the axial seal of sealed pressure in face of upper cover plate (1) and increases therewith, keeps low temperature shape
The axial seal of rim of the mouth (4), effective sealing of the rim of the mouth (4) under low-temperature condition in realization are gone up under state.
10. low temperature resistant air spring, including upper cover plate (1), the retaining ring (2) of abutting upper cover plate (1) bottom surface, connection upper cover plate (1)
It is compressed between upper cover plate (1) and retaining ring (2) with the upper rim of the mouth (4) of the connection bolt (3) and air bag of retaining ring (2), air bag, retaining ring
(2) and the radial outside that bolt (3) are arranged at rim of the mouth (4) is connected, utricule and retaining ring (2) inner wall below upper rim of the mouth (4)
It is bonded and carries over downwards and conform to retaining ring (2) bottom surface, it is characterised in that the sealing structure in the upper rim of the mouth (4) is wanted using right
Seek 1 to 8 described in any item low temperature resistant air spring sub-mouth sealing structures.
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| CN201910353905.XA CN109944894B (en) | 2019-04-29 | 2019-04-29 | Sealing structure, method and product of sub-opening on low-temperature-resistant air spring |
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| CN201910353905.XA CN109944894B (en) | 2019-04-29 | 2019-04-29 | Sealing structure, method and product of sub-opening on low-temperature-resistant air spring |
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Cited By (3)
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| CN111520473A (en) * | 2020-05-06 | 2020-08-11 | 航天特种材料及工艺技术研究所 | Composite material aircraft fuel tank port cover sealing structure and sealing method |
| CN112431886A (en) * | 2020-11-05 | 2021-03-02 | 安徽红桥金属制造有限公司 | Combinable multi-joint-bag type air spring |
| CN112594317A (en) * | 2020-11-05 | 2021-04-02 | 安徽红桥金属制造有限公司 | Air spring convenient for cover plate installation |
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| CN111520473B (en) * | 2020-05-06 | 2022-03-01 | 航天特种材料及工艺技术研究所 | Composite material aircraft fuel tank port cover sealing structure and sealing method |
| CN112431886A (en) * | 2020-11-05 | 2021-03-02 | 安徽红桥金属制造有限公司 | Combinable multi-joint-bag type air spring |
| CN112594317A (en) * | 2020-11-05 | 2021-04-02 | 安徽红桥金属制造有限公司 | Air spring convenient for cover plate installation |
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| CN109944894B (en) | 2023-12-01 |
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