CN106678477A - Self-pressing dynamic seal compensator - Google Patents
Self-pressing dynamic seal compensator Download PDFInfo
- Publication number
- CN106678477A CN106678477A CN201710088804.5A CN201710088804A CN106678477A CN 106678477 A CN106678477 A CN 106678477A CN 201710088804 A CN201710088804 A CN 201710088804A CN 106678477 A CN106678477 A CN 106678477A
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- Prior art keywords
- core pipe
- tube wall
- outside
- coating
- compensator
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Classifications
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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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L51/00—Expansion-compensation arrangements for pipe-lines
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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
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
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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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
Abstract
The invention provides a self-pressing dynamic seal compensator. The self-pressing dynamic seal compensator comprises a core pipe, an outer pipe, a check ring and seal rings, wherein the outer side pipe wall of the right end of the core pipe is sleeved with the inner side pipe wall of the outer pipe; the outer side pipe wall of the right end of the core pipe is sleeved with the seal rings and the seal rings are sleeved with the outer pipe; seal grooves are formed in the outer side pipe wall of the right end of the core pipe, the seal rings are installed in the seal grooves, and the tops of the seal grooves make contact with the inner surface pipe wall of the outer pipe; the check ring is arranged on the outer side pipe wall of the left end of the core pipe, and the distance between the check ring and the end surface of the leftmost end of the core pipe is 1/6 of the total length of the compensator; and the seal grooves are composed of multiple independent seal grooves, and the number N of the independent seal grooves ranges from 2 to 4. The compensator is further provided with an anti-falling structure which is arranged on the outer side of the core pipe and connected with the outer side pipe wall of the core pipe and the outer side pipe wall of the outer pipe. According to the compensator, the independent seal grooves replace a single graphite seal, a multi-sealing effect is realized, and the sealing performance between the core pipe and the outer pipe of the compensator is improved.
Description
Technical field
The present invention relates to compensator technical field, more particularly to a kind of self-pressing type dynamic sealing compensator.
Background technology
Primitive nature compensation way being adopted the compensation of pipeline mode of prior art, investment and the pressure loss are all larger more；Mend
The structure for repaying device is not good enough with sealing property, and leakage phenomenon is more serious, weaker in terms of anti-corrosion link yet；Whirl compensator performance
It is more outstanding；With compensation dosage is big, flexible arrangement, particularly application advantageization is more apparent in the defeated aerial pipeline of length；But there is also
It is not enough：One to be inner tube excessive with both junctions of reducer pipe gap, and vortex can be produced at the position in fluid media (medium) motion,
Which adds the pressure loss of fluid media (medium).Two be compensator because structure is radial direction operation principle, apply in the duct
Extra certain space is must tie up during arrangement；The cost and crushing of pipe network is so increased again；And on buried pipeline root
Originally cannot be commonly used；Particularly existing ball joint compensator, slip-type expansion joint, FlexbleJoint, whirl compensator are adopted
Be all single seal form, in use：The aspects such as fluid media (medium) and bearing capacity are necessarily limited to.
Such as Chinese patent CN103968179B is disclosed the invention discloses a kind of novel plastic pipeline compensator, belongs to
The technical field of heat distribution pipeline compensation device；Pipe A is formed by outer adpting flange B, pipe A, seal architectures, the convex outer shrouds of pipe A
Composite unit structure；By outer adpting flange A, pipe B, the convex outer shrouds of pipe B, core pipe, the convex outer shroud of core pipe, anti-slip position-arresting ring and overcoat
Pipe formed pipe B composite unit structures squeezed by axial thermal expansion power push away when, pipe A composite unit structures and pipe B assemblys
Structure can pass through the plastic deformation coaxial synchronous entirety relative movement vertically of the corrugated tube；Had using such structure coaxial
High precision, coefficient of friction, itself torque, the pressure loss are less, and bending resistance, bearing capacity are higher, medium flow to it is unrestricted, it is close
Envelope is reliable, safer, the easy to maintenance advantage of function admirable, conduit running.The compensation wherein sealing ring adopts O-shaped sealing
Ring, therefore the compensator is low to medium fluid pressure capacity, sealing property is not strong, while its corrugated tube and pipe A assemblys,
Pipe B assemblys structure constitutes anti-slip structure, and its structure of the structure is excessive, is not easy to assembling.And for example Chinese patent
CN102537576B is to propose a kind of pressure ring with the sliding bearing airtight and watertight padding both sides as compensation with self-lubricating property,
High Temperature High Pressure slip-type expansion joint encapsulant packing cavity is special with self-lubricating by trocar sheath, inner sleeve and packing cavity both sides
Property sliding bearing pressure ring with being combined into.Sliding bearing pressure ring with self-lubricating property is kept between trocar sheath and inner sleeve
Concentricity, compensator internal and external casing can be strengthened and resist tangential moment of torsion breakseal gland sealed ability, be again encapsulant
The pressure ring that packing cavity two is surveyed, this encapsulant packing cavity with sliding bearing pressure ring supporting construction, sliding bearing pressure ring and benefit
The inside and outside sleeve surface gap very little of device is repaid, the contact area of compensator liquid working medium and airtight and watertight padding is reduced, is reduced
At high temperature under high pressure the performance requirement of compensator airtight and watertight padding, simplifies compensator structure, improves the sealing of airtight and watertight padding
Energy.Strengthen the sealability of compensator in the patent by sliding bearing pressure ring, when the compensator of such setting greatly strengthen
Upper product cost, while being not easy to maintenance in use.
The content of the invention
To overcome the problem that sealing present in prior art is poor, maintenance is difficult, the invention provides a kind of self-pressing type is dynamic
Sealing compensation device.
The invention provides a kind of self-pressing type dynamic sealing compensator, the self-pressing type dynamic sealing compensator includes core pipe, outer
Pipe, back-up ring and sealing ring；Tube wall is set in the tube wall of outer tube inner side on the outside of core pipe right-hand member；Seal ring set is in core pipe right-hand member outboard tube
On wall, and it is inserted in outer tube, it is characterised in that：Tube wall is provided with seal groove, seal groove and installs sealing on the outside of the core pipe right-hand member
Ring, seal groove top contacts with outer tube inner surface tube wall；Back-up ring is on tube wall on the outside of core pipe left end, and back-up ring is most left apart from core pipe
The length of end end face is the 1/6 of compensator overall length；The seal groove is made up of the independent sealed groove of multiple tracks, described independent sealed
Slot number amount range set is in 2≤N≤4；The compensator is additionally provided with disconnecting prevention structure, and the disconnecting prevention structure is located at the connection of core pipe outside
Tube wall on the outside of tube wall and outer tube on the outside of core pipe.Compensator replaces single track graphite grazing using independent sealed groove, plays multi-sealed
Effect, enhances the sealing property between the core pipe of compensator and outer tube.
Further, in the seal groove quantity set of independent sealed groove in N=3.
Further, the seal groove is followed successively by from left to right：Independent sealed groove A, independent sealed groove B and independent sealed groove
C；The independent sealed groove A, independent sealed groove B and independent sealed groove C are arranged on the outside of core pipe right-hand member on tube wall；The independence is close
YX sealing rings are mounted in sealing groove A and independent sealed groove B, independent sealed groove C is provided with O-shaped sealing ring.
Further, the disconnecting prevention structure is made up of differential and flange, and flange is welded in tube wall end on the outside of outer tube, differential
The tube wall on the outside of core pipe left end, and near tube wall end on the outside of outer tube.
Further, plural through hole A is uniformly provided with the differential end face, is provided with respect to the end face of flange of differential end face
The through hole B of equal number；Through hole A is crossed between the differential and flange by screw bolt and nut to be fixedly connected with through hole B.
Further, tube wall external diameter is more than tube wall external diameter on the outside of core pipe left end on the outside of the core pipe right-hand member, outside core pipe right-hand member
Step surface is formed on the outside of side pipe wall and core pipe left end between tube wall.
Step surface further, on the outside of overcoat inner wall of end, core pipe right-hand member on the outside of tube wall and core pipe left end between tube wall,
Cavity is formed between the three of differential right side, dust ring is set in the cavity.
Further, the inner surface that the differential is contacted with tube wall on the outside of core pipe left end is provided with annular groove.
Further, tube wall surface and outer tube inner side tube wall surface apply matcoveredn on the outside of the core pipe right-hand member, described
Protective layer structure is multi-layer nano structure；Multi-layer nano structure is followed successively by from the inside to the outside undercoating and external coating；The undercoating
Thickness is 0.4-0.5um, and containing YN yttrium nitrides and methyl ether in undercoating, yttrium nitride content is 20%-30% in the undercoating,
Methyl ether content is 10-15%, and remaining is binding agent.
Further, the external coating is to be laminated what coating A, coating B and coating C were constituted by the order of coating A-B-A-C
Composite coating, and the composite coating need to repeatedly be laminated and formed more than twice external coating；Coating A adopts TiAlN TiAlN coatings,
Coating layer thickness is 0.1-0.2um；Coating B adopts silicon nitride SiN overcoat, and coating layer thickness is 0.1-0.15um；Coating C is adopted and is based on
TiN coatings, coating layer thickness is 0.1-0.2um.
Compared with prior art, the invention has the beneficial effects as follows：
(1) compensator replaces single track graphite grazing using independent sealed groove in the present invention, plays multi-sealed effect, strengthens
Sealing property between the core pipe and outer tube of compensator.
(2) independent sealed slot number amount is set in 2≤N≤4 in the present invention, wherein the quantity of independent sealed groove is very few, then
The sealing property of compensator does not obtain corresponding raising to using single track graphite grazing；In addition, one side sealing property is in independence
Its sealing property also reaches actual operation requirements after seal groove quantity is certain, on the other hand arranges excessive independent sealed groove meeting
Increase the difficulty of processing of compensator, improve cost of manufacture, reduce the core pipe mechanical strength with outer tube contact portion.Will in the present invention
The quantity set of independent sealed groove can fully ensure that the sealing property of compensator in N=3 using the independent sealed groove in three roads, and it adds
Work difficulty is little；Optimal synthesis will be obtained between core pipe mechanical strength, processing cost and sealing property three.
(3) sealing ring adopts two kinds of different model sealing rings in the present invention, and O-shaped sealing ring can be under static and dynamic
Sealing is capable of achieving, but the restriction of the speed at O-shaped its sealing of sealing ring and pressure is used alone；The wearability of YX sealing rings is good,
Impact resistance, resist out, and compression is little, but only using YX sealing rings its sealings effect effectively, while the sealing of composition is simultaneously
It is not applied for various working demand；YX sealing rings and O-shaped packing ring combination are used in the present embodiment so as to the independence of composition
Seal groove is suitable for different working conditions.
(4) in the present invention there is disconnecting prevention structure in compensator, be less prone to when compensation is axially expanded with heat and contract with cold pull phenomenon and
Reveal, while demolition and maintenance can be facilitated by flange and differential connection.
(5) inner surface that institute's differential is contacted with tube wall on the outside of core pipe left end in the present invention is provided with annular groove, the ring
The setting purpose of connected in star is to form labyrinth seal structure on the outside of differential and core pipe left end between tube wall；The labyrinth seal
Both structure and dustproof groove form the double sealing structure between core pipe work surface and outside, further enhance compensator external
The sealing property on boundary.
(6) in the present invention protective layer tube wall surface is respectively provided with strong attachment on the inside of tube wall surface and outer tube on the outside of the core pipe right-hand member
Power, while protective layer possesses in itself high-efficiency abrasion-proof and decay resistance, tube wall surface and outer tube on the outside of effective protection core pipe right-hand member
Inner side tube wall surface, it is to avoid compensator work surface is damaged, and increased the service life of compensator.
(7) TiAlN TiAlNs coating has high thermohardening, non-oxidizability, wear-resisting and decay resistance, while using
Interlayer silicon nitride SiN overcoat between TiAlN TiAlNs coating and TiA coatings, due to SiN layer itself have very high hardness and
There is polycrystalline superlattices hardening effect in anti-wear performance, TiAlN layers and SiN, TiN layer and SiN layer so that composite coating integrally has
There is higher hardness, it is ensured that the high-efficiency abrasion-proof performance of coating and decay resistance.
Description of the drawings
Fig. 1 is self-action dynamic sealing compensator schematic diagram；
Fig. 2 is seal groove close-up schematic view.
With reference to accompanying drawing labelling thereon：
1- core pipe left ends, 2- back-up rings, 3- differentials, 4- flanges, 5-YX sealing rings, 6-O type sealing rings, 7- outer tubes, 10- core pipes
Right-hand member.
Specific embodiment
Below in conjunction with drawings and Examples, the present invention will be described in further detail.It should be appreciated that described herein
Specific embodiment only to explain the present invention, is not intended to limit the present invention.
Embodiment 1
Present embodiments provide a kind of self-pressing type dynamic sealing compensator, the self-pressing type dynamic sealing compensator include core pipe,
Outer tube 7, back-up ring 2 and sealing ring；The outside tube wall of core pipe right-hand member 10 is set in the inner side tube wall of outer tube 7；Seal ring set is right in core pipe
Hold on 10 outside tube walls, and be inserted in outer tube 7, enable core pipe and the relative slip of outer tube 7, and ensure sealing.The core pipe right-hand member
10 outside tube walls are provided with seal groove, seal groove installs sealing ring, and seal groove top contacts with the inner surface tube wall of outer tube 7；Gear
On the outside tube wall of core pipe left end 1, back-up ring 2 is the 1/ of compensator overall length apart from the length of core pipe high order end end face to circle 2
6, the overall length of compensator is 600mm in the present embodiment, and its guide ring 2 is 100mm apart from core pipe high order end end face length；Institute
It is setting compensation device maximum compressibility to state back-up ring 2；The seal groove is made up of the independent sealed groove of multiple tracks, independent in the seal groove
Seal groove quantitative range is set in 2≤N≤4；Single track graphite grazing is replaced using independent sealed groove, multi-sealed effect is played,
Enhance the sealing property between the core pipe of compensator and outer tube 7；Simultaneously for the setting of independent sealed slot number amount, wherein independently
The quantity of seal groove is very few, then the sealing property of compensator does not obtain corresponding raising to using single track graphite grazing；In addition, one
Aspect sealing property its sealing property after independent sealed slot number amount is certain also reaches actual operation requirements, on the other hand arranges
Excessive independent sealed groove can increase the difficulty of processing of compensator, improve cost of manufacture, reduce the core pipe with the contact portion of outer tube 7
Mechanical strength.The quantity set of independent sealed groove can be fully ensured that in N=3 using the independent sealed groove in three roads in present embodiment
The sealing property of compensator, its difficulty of processing is little；To obtain most between core pipe mechanical strength, processing cost and sealing property three
Good synthesis.According in the present embodiment, independent sealed slot number amount is preferably 3, therefore as shown in figure 1, the seal groove from left to right
It is followed successively by：Independent sealed groove A, independent sealed groove B and independent sealed groove C；The independent sealed groove A, independent sealed groove B and independence
Seal groove C is arranged on the outside tube wall of core pipe right-hand member 10, the independent sealed groove according to seal form be divided into the first seal groove and
Second seal groove, the independent sealed groove near the end of outer tube 7 is the first seal groove (as seal groove A and seal groove B), away from outer
The seal groove of the end of pipe 7 is the second seal groove (as seal groove C)；YX is mounted in independent sealed groove A and independent sealed groove B
Sealing ring 5, independent sealed groove C is provided with O-shaped sealing ring 6, and by two kinds of different model sealing rings, the circle of O-shaped sealing ring 6 can be quiet
Sealing is capable of achieving under state and dynamic, but the restriction of the speed at O-shaped its sealing of sealing ring 6 and pressure is used alone；YX is sealed
The wearability of ring 5 is good, impact resistance, resist out, and compression is little, but only using YX sealing rings 5 its sealings effect effectively, together
The sealing of Shi Zucheng can not be applied to various working demand；YX sealing rings 5 and the combination of O-shaped sealing ring 6 are made in the present embodiment
With so as to the independent sealed groove of composition is suitable for different working conditions.In actual use outer tube 7 and core pipe be between the two
Contact surface precision angle when, because upper and lower contact surface precision is not high, can there is minim gap between its upper and lower contact surface, now
The gap that core pipe inside or the exterior materials of outer tube 7 can pass through in upper and lower contact surface produces contact, and material in core pipe is polluted,
Or cause the leakage of compensator；Therefore need to improve machining accuracy to the contact surface between core pipe and outer tube 7；The contact surface
Using the handling process processing of smart car and fine grinding, contact surface range of surface roughness improves contact surface processing in below Ra1.6
Precision, reduces frictional force, so as to reduce the thrust to anchor block.
As present embodiment it is further preferred that in the case where compensator sealer sealing property is guaranteed, its
Compensator easily occurs pulling phenomenon when compensation is axially expanded with heat and contract with cold, and causes leakage, while compensator has maintenance not easy to remove；
Therefore need to arrange disconnecting prevention structure in compensator；Compensator described in the present embodiment is additionally provided with disconnecting prevention structure, the disconnecting prevention structure
Tube wall and the outside tube wall of outer tube 7 on the outside of core pipe outside, connection core pipe；The disconnecting prevention structure is made up of differential 3 and flange 4,
Flange 4 is welded in the outside tube wall end of outer tube 7, and differential 3 is located at the outside tube wall of core pipe left end 1, and near the outside tube wall end of outer tube 7
Portion；Plural through hole A is uniformly provided with the end face of the differential 3, with respect to the end face of flange 4 of the end face of differential 3 equal number is provided with
Through hole B；Through hole A is crossed between the differential 3 and flange 4 by screw bolt and nut to be fixedly connected with through hole B so that compensator is just
In demolition and maintenance, it is ensured that the thrust between differential 3 and flange 4 in all directions is equal so that differential 3 is close to flange 4；Core pipe is right
10 outside tube wall external diameters are held more than the outside tube wall external diameter of core pipe left end 1, in core pipe on the outside of right-hand member outboard tube wall and left end tube wall it
Between form step surface, therefore, when core pipe is slided relative to outer tube 7, its compensator when axial elongation reaches maximum, differential 3
Its right end face to the outboard tube wall pressure of core pipe right-hand member 10 is tight, because the outside tube wall external diameter of core pipe right-hand member 10 is more than the outside of core pipe left end 1
Tube wall external diameter, the now stop of core pipe right-hand member 10 differential 3 slides to the right, and now the elongation of compensator remains constant, compensation
Device is not in pull phenomenon；The simultaneously platform in overcoat inner wall of end, core pipe on the outside of right-hand member outboard tube wall and left end between tube wall
Cavity is formed between terrace, the right side three of differential 3, dust ring is set in the cavity；The dustproof groove avoids outside debris
Into work surface, work surface is damaged, while ensure that compensator will not be leaked under flexible maximum or extreme case.It is described
The inner surface that differential 3 is contacted with the outside tube wall of core pipe left end 1 is provided with annular groove, and the setting purpose of the annular groove is：
Labyrinth seal structure is formed on the outside of differential 3 and pipe left end between tube wall；Both the labyrinth seal structure and dustproof groove shape
Into the double sealing structure between core pipe work surface and outside, compensator sealing property to external world is further enhanced.
Embodiment 2
The present embodiment is with first embodiment difference：It is difficult in actual use for more preferable guarantee core pipe
Corroded by extraneous and fluids within pipes, and possessed high wear resistance, the outside tube wall surface of the core pipe right-hand member 10 and
The inner side tube wall surface of outer tube 7 applies matcoveredn, and the protective layer structure is multi-layer nano structure；Protect described in multi-layer nano structure
Sheath is by being followed successively by undercoating and external coating outside interior；The undercoating thickness is 0.4-0.5um, is nitrogenized containing YN in undercoating
Yttrium and methyl ether, yttrium nitride content is 20%-30% in the undercoating, and methyl ether content is 10-15%, and remaining is remaining as bonding
Agent, using undercoating as base coating, strengthens the combination of protective layer tube wall and the inner side tube wall surface of outer tube 7 on the outside of core pipe
Power；The external coating is the composite coating by order stacking coating A, coating B and coating C composition of coating A-B-A-C, and this is multiple
Conjunction coating need to repeatedly be laminated and formed more than twice external coating；Coating A adopts TiAlN TiAlN coatings, and coating layer thickness is 0.1-
0.2um；Coating B adopts silicon nitride SiN overcoat, and coating layer thickness is 0.1-0.15um；Coating C applies thickness using TiN coatings are based on
Spend for 0.1-0.2um；TiAlN TiAlN coatings have high thermohardening, non-oxidizability, wear-resisting and decay resistance, while adopting
With interlayer silicon nitride SiN overcoat between TiAlN TiAlNs coating and TiA coatings, because SiN layer itself has very high hardness
And anti-wear performance, there is polycrystalline superlattices hardening effect in TiAlN layers and SiN, TiN layer and SiN layer so that composite coating entirety
With higher hardness, it is ensured that the high-efficiency abrasion-proof performance of coating and decay resistance；It is further preferred that for cause protective layer its
Wear-resisting most preferably to be played, undercoating thickness 0.45um in the present embodiment, wherein yttrium nitride content are 25%, and methyl ether content is
13%, remaining is remaining as binding agent；Coating A adopts TiAlN TiAlN coatings, and coating layer thickness is 0.15um；Coating B adopts nitrogen
SiClx SiN overcoat, coating layer thickness is 0.1um；Coating C adopts TiN TiAlN coatings, and coating layer thickness is 0.15um.
Protective layer is respectively provided with strong attached in the outside tube wall surface of core pipe right-hand member 10 and the inner side tube wall surface of outer tube 7 in the present embodiment
Put forth effort, while protective layer possesses in itself high-efficiency abrasion-proof and decay resistance, the outside tube wall surface of effective protection core pipe right-hand member 10 and
The inner side tube wall surface of outer tube 7, it is to avoid compensator work surface is damaged, and increased the service life of compensator.
Described above illustrates and describes the preferred embodiments of the present invention, as previously mentioned, it should be understood that not office of the invention
Be limited to form disclosed herein, be not to be taken as the exclusion to other embodiment, and can be used for various other combinations, modification and
Environment, and can be changed by the technology or knowledge of above-mentioned teaching or association area in invention contemplated scope described herein
It is dynamic.And change that those skilled in the art are carried out and change be without departing from the spirit and scope of the present invention, then all should be appended by the present invention
In scope of the claims.
Claims (10)
1. a kind of self-pressing type dynamic sealing compensator, the self-pressing type dynamic sealing compensator include core pipe, outer tube (7), back-up ring (2) and
Sealing ring；Core pipe right-hand member (10) outside tube wall is set in the tube wall of outer tube (7) inner side；Seal ring set is in core pipe right-hand member (10) outside
On tube wall, and outer tube (7) is inserted in, core pipe right-hand member (10) outside tube wall is provided with seal groove, seal groove installs sealing ring,
Seal groove top contacts with outer tube (7) inner surface tube wall；It is characterized in that：Back-up ring (2) is located at core pipe left end (1) outside tube wall
On, back-up ring (2) is the 1/6 of compensator overall length apart from the length of core pipe high order end end face；The seal groove is by multiple tracks independence
Seal groove is constituted, and the independent sealed slot number amount range set is in 2≤N≤4；The compensator is additionally provided with disconnecting prevention structure, described
Disconnecting prevention structure tube wall and outer tube (7) outside tube wall on the outside of core pipe outside connection core pipe.
2. self-pressing type dynamic sealing compensator according to claim 1, it is characterised in that：Independent sealed groove in the seal groove
Quantity set in N=3.
3. self-pressing type dynamic sealing compensator according to claim 2, it is characterised in that：The seal groove is from left to right successively
For：Independent sealed groove A, independent sealed groove B and independent sealed groove C；The independent sealed groove A, independent sealed groove B and independent sealed
Groove C is on the tube wall of core pipe right-hand member (10) outside；YX sealings are mounted in the independent sealed groove A and independent sealed groove B
Ring (5), is provided with O-shaped sealing ring (6) in independent sealed groove C.
4. self-pressing type dynamic sealing compensator according to claim 1, it is characterised in that：The disconnecting prevention structure is by differential (3)
Constitute with flange (4), flange (4) is welded in outer tube (7) outside tube wall end, and differential (3) is located at core pipe left end (1) outboard tube
Wall, and near outer tube (7) outside tube wall end.
5. self-pressing type dynamic sealing compensator according to claim 4, it is characterised in that：It is uniform on differential (3) end face
Plural through hole A is provided with, with respect to flange (4) end face of differential (3) end face the through hole B of equal number is provided with；The differential (3) and
Through hole A is crossed between flange (4) by screw bolt and nut to be fixedly connected with through hole B.
6. self-pressing type dynamic sealing compensator according to claim 1, it is characterised in that：Outside the tube wall of core pipe right-hand member (10) outside
Footpath is more than core pipe left end (1) outside tube wall external diameter, shape between core pipe right-hand member (10) outside tube wall and core pipe left end (1) outside tube wall
Into step surface.
7. self-pressing type dynamic sealing compensator according to claim 1, it is characterised in that：Overcoat inner wall of end, core pipe are upper right
Cavity is formed between step surface, differential (3) right side three between end outside tube wall and core pipe left end (1) outside tube wall, institute
State and arrange in cavity dust ring.
8. self-pressing type dynamic sealing compensator according to claim 1, it is characterised in that：The differential (3) and core pipe left end
(1) inner surface of outside tube wall contact is provided with annular groove.
9. self-pressing type dynamic sealing compensator according to claim 1, it is characterised in that：Core pipe right-hand member (10) outboard tube
Wall surface and outer tube (7) inner side tube wall surface apply matcoveredn, and the protective layer structure is multi-layer nano structure；Multi-layer nano
Structure is followed successively by from the inside to the outside undercoating and external coating；The undercoating thickness is 0.4-0.5um, is nitrogenized containing YN in undercoating
Yttrium and methyl ether, yttrium nitride content is 20%-30% in the undercoating, and methyl ether content is 10-15%, and remaining is binding agent.
10. self-pressing type dynamic sealing compensator according to claim 9, it is characterised in that：The external coating is by coating A-
The composite coating that order stacking coating A of B-A-C, coating B and coating C are constituted, and the composite coating need to be laminated repeatedly twice with
Upper formation external coating；Coating A adopts TiAlN TiAlN coatings, and coating layer thickness is 0.1-0.2um；Coating B adopts silicon nitride
SiN overcoat, coating layer thickness is 0.1-0.15um；Using TiN coatings are based on, coating layer thickness is 0.1-0.2um to coating C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710088804.5A CN106678477A (en) | 2017-02-20 | 2017-02-20 | Self-pressing dynamic seal compensator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710088804.5A CN106678477A (en) | 2017-02-20 | 2017-02-20 | Self-pressing dynamic seal compensator |
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| CN106678477A true CN106678477A (en) | 2017-05-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN202392344U (en) * | 2011-12-27 | 2012-08-22 | 大连益多管道有限公司 | Double-supporting self-sealed rotating compensator |
| CN102537576A (en) * | 2012-02-24 | 2012-07-04 | 江苏大学 | High-temperature and high-pressure sleeve type compensator |
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| CN113389899A (en) * | 2021-06-18 | 2021-09-14 | 广西玉柴机器股份有限公司 | Suspension type double-expansion-ring sealing mechanism |
| CN113389899B (en) * | 2021-06-18 | 2024-04-09 | 广西玉柴机器股份有限公司 | Suspension type double-expansion-ring sealing mechanism |
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