CN102261472A - Bound self-excitation sealing ring, gasket and structure - Google Patents
Bound self-excitation sealing ring, gasket and structure Download PDFInfo
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- CN102261472A CN102261472A CN201010195142XA CN201010195142A CN102261472A CN 102261472 A CN102261472 A CN 102261472A CN 201010195142X A CN201010195142X A CN 201010195142XA CN 201010195142 A CN201010195142 A CN 201010195142A CN 102261472 A CN102261472 A CN 102261472A
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Abstract
The invention discloses a bound self-excitation sealing ring designed according to a new self-sealing mechanism. The bound self-excitation sealing ring consists of a flexible sealing material ring (02) and an outer binding ring (01) thereof and a lining ring (03); and the extremely thin soft metal lining ring is thinner than an eggshell, can resist external pressure rather than internal pressure, can effectively resist free cold contraction or constraint of the flexible material ring without affecting the self-excitation sealing property of the material ring, and can be arranged in a bound cavity as an O-shaped rubber ring. The material ring made of polytetrafluoroethylene (PTFE) or flexible graphite can orthogonally transfer pressure as liquid, namely work in a self-sealing mode. Therefore, a sealing connecting bolt or thread is screwed down by a finger or close to a finger; and in the range that the material does not produce phase change or is not decomposed, as long as the pressure bearing parts are not broken, the seal does not lose effect.
Description
Technical field
The invention belongs to the technical field of sealing technology that is subjected to piezodielectric, relate to the axial seal structure, promptly relate to the Butt sealing structure of end face, do not relate to radial seal structure, the fitted seal structure that does not promptly relate to cylinder, particularly the self-excitation seal ring of flange and cylinder cap etc., self-excitation sealing gasket and self-excitation sealing configuration.
Background technique
Be subjected to the sealing of piezodielectric, press the Normal direction of sealing surface, be divided into axial seal and radial seal.Axial seal is implemented sealing by the flat end face of seal ring, can cry plane or end face seal, is used to realize the end face Butt sealing of pressure piping or container; Radial seal is implemented sealing by the cylindrical surface of seal ring, can cry the cylinder sealing, is used to realize the cylinder fitted seal of hole/bar or cylinder/plug.Widely used flange gasket and cylinder cap sealing gasket are exactly most typical side sealing element, and its flat sealed face is prefabricated, and its working seal stress provides by installation pretightening force, are not to lean on the pressure medium self-excitation that is sealed to provide; Different seal Backing materials and different application require different sealing configurations and different installation pretightening forces, cause its Seal Design and install very loaded down with trivial details.Widely used O shape rubber seal, both can be used as the plane sealing element, also can be used as the cylinder seal element, but its flat sealed face and cylindricality sealing surface are by the pressure distortion generation of installation or medium rather than prefabricated, its working seal stress is to lean on the pressure medium self-excitation that is sealed to provide, and does not provide by installation pretightening force; It installs decrement, tie up the chamber fills up coefficient and extrudes gap etc. and become with temperature, not only cause it to be of limited application, and causing it, to tie up the groove design also remarkable.
Sealing is fill up interface rough and uneven in surface, and therefore, material is soft more, realizes that sealing is easy more.The end face selfsealings of pad are that the pressure medium on its cylinder is converted to Sealing Stress on the quadrature end face totally, therefore, with padding existing end face selfsealings, are to make solid softwood matter transmit pressure by the liquid quadrature, obviously need while innovation theory and structure.
American National laboratory report " carrying out real fluidity on the macromolecule membrane surface observes " record according to He Manjun etc. " Polymer Physics " and Wang Jin (transliteration) etc., solid macromolecule sealing material commonly used, as teflon and rubber, the thermal motion of its molecule segment is like fluid turbulent fluctuation in the pipe, its whole molecular chain quasi-fluid delivery pipe, existing solidity has fluidity again.Before this, do not have the sealing applications that other people close the solid material be marked with fluidity, more do not have other people and study with softwood matter and generally realize selfsealings.The invention reside in the innovation proposition and use following " the selfsealings mechanism of material and application main points thereof ", successfully generally realize selfsealings with softwood matter:
The selfsealings mechanism of a material
The selfsealings of sealing gasket are that the pressure medium on its cylinder is converted to Sealing Stress on the quadrature end face totally, in other words, are to need pad to transmit pressure by quadrature; According to the Poisson distortion, the orthogonality distortion/strain/stress (response) of the sealing material ring of pressurized, by the decision of Poisson ratio size, and the Poisson ratio of sealing material is all greater than 0 with less than 0.5; Therefore, the soft material ring of all solids, all can pass through an angle of wedge that is material fluidity offset angle, the response of orthogonality distortion during with its pressurized compensates to and has Poisson ratio and equal the same orthogonality distortion response of 0.5 pressure fluid or reach the propagation of pressure degree that is equal to liquid and as pressure sealing ring.For the sealing material ring that fluidity is arranged, when having only its radial and axial border contact not have the gap simultaneously, could in time transmit pressure or realize selfsealings by its fluidity quadrature; Yet the foozle of ring and the coefficient of thermal expansion and contraction of material are poor, and it is gapped to tend to cause the contact of ring border; Therefore, sealing material ring also needs a border contact compensation angle of wedge, by the orthogonality distortion that is directly proportional with Poisson ratio due to the gap, keeps its sealing contact all the time when in time offsetting its pressurized.So, to all solid soft materials, no matter it has or not fluidity, its selfsealings even non-selfsealings design, all be angle of wedge design, mobile with solidity wedge of effective utilization material moving (a kind of wedge that is different from rigid wedge is moving) and fluidity, and the angle of wedge is big more, wedge angle is spacious more or slick and sly more, the pressure transmission that the moving deformation-compensated and fluidity of favourable more its solidity wedge flows, but the angle of wedge can not cause the contact of its disengaging with the offset angle face greatly to expanding with heat and contract with cold.
The orthogonality distortion and the quadrature propagation of pressure of b sealing material ring
Sealing material ring is when being subjected to the pressure medium distortion, and its Poisson is out of shape (strain) ratio:
μ=ε
h/ ε
c[height strain/girth strain]
=(Δ
h/ h)/(2 π Δ r/2 π r) [girth strain=radius strain]
＝(rΔ
h)/(hΔ
r) 【Δ
h/Δ
r＝μh/r】
Therefore, if, be orthogonality distortion/strain/stress with the Poisson distortion/strain/stress of Vertical loading direction (perpendicular rings footpath ring height), then sealing material ring when being subjected to the pressure medium distortion, its orthogonality distortion (the ring height is out of shape):
Δ
h＝(μh/r)Δ
r＝(tgθ)Δ
r (a)
Wherein, μ is the Poisson's ratio of sealing material, ε
cGirth strain (longitudinal strain or radius strain) when being sealing material annular strain, ε
hHeight strain (transverse strain or orthogonal strain) when being sealing material annular strain, r is the inside radius of sealing material ring, h is the height of sealing material ring, Δ
rBe the radial deformation of sealing material ring, Δ
hBe the orthogonality distortion of sealing material ring, tg θ is the orthogonality distortion rate of sealing material ring.Hence one can see that, and the Poisson ratio of sealing material is more little, and the orthogonality distortion or the stress response of compression seal material ring are more little, and quadrature propagation of pressure or selfsealings are poor more naturally.
The material fluidity compensation (compensation of orthogonality distortion) of c sealing material ring
Material softer means easy compressive deformation or mobile; Therefore, as the soft and incompressible material of liquid, can in time respectively flow or identical transmission pressure under pressure to identical.The Poisson ratio of material is generally greater than 0 less than 0.5, is the incompressibility or the liquidity index of material, and the material of Poisson's ratio μ=0.5 is incompressible fully, and the material of Poisson's ratio μ=0 is compressible fully.Therefore, the solid material of all easy compressive deformations as polytetrafluoroethylene (PTFE), rubber and Expanded graphite, all needs a material fluidity offset angle θ as shown in Figure 2
1Make its orthogonality distortion that has Poisson's ratio μ=0.5 o'clock response or incompressible response, could have the quadrature propagation of pressure characteristic as the liquid fully, satisfy the requirement of self-excitation seal operation, in other words, make it by the enough little space of large space wedging, increase its orthogonality distortion or stress response, reach the quadrature propagation of pressure effect as the liquid.
The border contact compensation (counteracting of orthogonality distortion) of d sealing material ring
The initial sealing contact is a kind of sealing contact that is realized under atmospheric temperature pressure, to soft material, generally tightens just and can realize with finger.As shown in Figure 2, sealing material ring (02) is tied up chamber (Φ d with it
2') radial clearance (C), under pressure medium, initial ring week increased and encircle the high Poisson distortion that subtracts, cause ring and break away from the initial sealing contact.In fact, for the sealing material ring that fluidity is arranged, when having only its radial and axial contact not have the gap simultaneously, could in time rely on its incompressibility quadrature to transmit pressure or realize the self-excitation sealing.Yet the foozle of ring and the coefficient of thermal expansion and contraction of material are poor, and it is gapped to tend to cause ring border contact, therefore, the sealing material ring of soft and incompressible (fluidity is arranged) are also needed a border contact offset angle θ
c, in time offset the pressurized orthogonality distortion that is directly proportional with Poisson ratio due to the gap, keep its axial initial sealing contact all the time.
The basic Poisson offset angle θ of e sealing material ring
e
According to aforementioned discussion, material fluidity compensation, when being intended to compensate its radial boundary contact zero-clearance by the deficiency of the orthogonality distortion of the sealing material ring due to the Poisson ratio less than 0.5; Border contact compensation is intended to offset its radial boundary and contacts the orthogonality distortion that is directly proportional with Poisson ratio by the sealing material ring due to the gap when gapped.Therefore,, then press orthogonality distortion formula (a) if fluidity compensation is 0 and 0.5 fully compensation by Poisson ratio respectively with contact compensation, any sealing material, because of its Poisson ratio all greater than 0 with less than 0.5, just an abundant fluidity offset angle θ who is equal to each other is all arranged
1Fully contact offset angle θ with one
c, and can be referred to as basic Poisson offset angle θ
e:
tgθ
e＝(μh)/r＝h/d (b)
Wherein h is a sealing material ring height, and d=2r is a sealing material ring internal diameter, and μ=0.5th reaches the Poisson ratio of abundant compensation.
F Poisson offset angle θ
nValue consider
As shown in Figure 2, Poisson offset angle θ
n(θ
1Or θ
c) big more, sealing material ring is when compressive deformation radially, and its orthogonality distortion or stress response are big more, and promptly its self-excitation sealing is good more; But, when the height of offset angle decision with the variance ratio of radius greater than by ring with when tiing up height due to the material temperature coefficient difference in chamber with the variance ratio (h/r) of radius, in expanding with heat and contract with cold, the Poisson offset angle breaks away from the sealing contact with densification envelope material ring.Therefore, by formula (b),
◆ when Seal Design can not avoid sealing material ring to break away from the initial sealing contact because of expanding with heat and contract with cold,
● for the approaching sealing material ring that fluidity is arranged of material, its Poisson offset angle θ
1Desirable:
(2tg θ e =) h/r＞tg θ
1＞
H/d (=tg θ e ), the border contact of main compensated loop, the fluidity of subsidiary compensation material,
● for the sealing material ring of material near no fluidity, its Poisson offset angle θ
2Desirable:
Lim tg θ
2=lim tg2 θ
e=
H/r (=2tg θ e ), compensate the fluidity of material and the border contact of ring simultaneously;
◆ when Seal Design can avoid sealing material ring to break away from the initial sealing contact because of expanding with heat and contract with cold,
● no matter seal and expect that the matter fluidity is good and bad or Poisson ratio is big and little, its Poisson offset angle θ
3Desirable:
tgθ
3＞
h/r(＝2tgθ e )。
G soft metal grommet is than hard eggshell eggshell also, more can critical external compressive resistance and press in anti-
Eggshell can bear suitable external pressure, but can not bear the weak young shell struggle force that spendes.The limit internal pressure P that pipeline can bear
i=2aS/d, be by [diameter wall thickness (2a)/internal diameter (d)] than and the ultimate tensile strength (S) of material determine; The limit external pressure P that pipeline can bear
o=2aS/D, be by [diameter wall thickness (2a)/external diameter (D)] than and the ultimate tensile strength (S) of material determine; The uniform pressure of pipeline outside causes pipe diameter and dwindles and cause wall thickness and evenly increase, and the uniform pressure of pipe interior causes pipe diameter and enlarges and cause wall thickness and evenly reduce; Therefore, the ability of the proof to external pressure ability of pipe much larger than its internal pressure-resistant expected in the soft metal, and almost do not have the outside uniform pressure limit that crushes pipe.So the soft metal grommet is than hard eggshell eggshell also, more can critical external compressive resistance and press in anti-, so that soft metal grommet as thin as a wafer is highly resistant to the free shrink and the constraint of soft sealing material ring, and don't the self-excitation sealing of influence material ring.That is to say that the self-excitation end face seal can have a revolutionary constraint or control the thin-wall metal grommet that it expands with heat and contract with cold and don't influences its self-excitation sealing with soft sealing material ring.
Embedded outer constrained the tiing up to nonmetal sealing material that US2007/0176373 and US6708983 patent provide is that the coiling by tangible metal tape provides, be multilayer alternately, complicated and expensive; The sealing bed of material is thin, even fluidity is arranged also because of discontinuous or flow resistance is big and useless, the drag of integrally welded which floor metal tape of innermost layer causes its no self-excitation sealing in addition.The constraint that the US2455982 patent provides to nonmetal sealing material, tiing up ring by single outer metal provides, and only for radially; Its sealing material ring is a self-excitation sealing unit, but only for rubber, it is very limited to cause its application specification, applicating medium, application of temperature and applying pressure; It is the pressure-bearing boundary that its metal is tied up ring, must be whole heavy wall, causes it and restricted application is extremely unbecoming.
Self-excitation that the US6739595 patent is provided sealing is not that the flexibility (distortion is flowed) by soft sealing material realizes, but by the rigidity of sealing material ring (the putting forth effort of face reflected the stressed tilting with bar) realization.
In a word, existing pad sealing technique is not to make solid softwood matter transmit pressure by the liquid quadrature from the design concept to the concrete structure.
Summary of the invention
As two the self-packing sealing material of butt joint end face rings, need an ad hoc end face and a full planar end surface that is used as sealed as sealing surface; Sealing material ring, be installed in tiing up in the chamber back, constitute sealing surface on the ad hoc end face with ad hoc end face, be used to fill up rough and uneven in surface (leakage way) on the full planar end surface and realize sealing, or be responsible for the automatic quadrature of the pressure medium on its cylinder is converted to Sealing Stress on its end face.Near the sealing material ring that fluidity is arranged,, in normal temperature and small dimension range applications, generally do not need the compensation of material fluidity for material, do not need border contact compensation yet as polytetrafluoroethylene (PTFE) and rubber seal material ring.But, to use for big specification, the coefficient of thermal expansion and contraction of PTFE is more than ten times of steel, the coefficient of thermal expansion and contraction of rubber is tens of times of steel; During temperature variation, specification is big more, sealing material ring diameter relatively its metal to tie up the chamber vary in diameter big more, can be big or can't install or because of can't quadrature transmitting pressure or in the excessive radial gap because of interference fit by the self-excitation seal operation; For example, the PTFE pad of a 100mm diameter, 50 ℃ of temperature variation, its steel is tied up about the vary in diameter 0.8mm of chamber relatively; The PTFE pad of a 4000mm diameter, 100 ℃ of temperature variation, its steel is tied up about the vary in diameter 64mm of chamber relatively.
Tie up radially expanding with heat and contract with cold of chamber for retraining relative its metal of soft sealing material ring, guarantee to seal unlikely its reliable installation and the reliably working that influence of vary in diameter of material ring, a kind of self-excitation seal ring of tiing up is proposed, orthogonality distortion by the sealing material realizes sealing, tie up ring (outer shroud) and metal grommet (interior ring) is formed by soft sealing material ring and metal thereof, or tie up ring (outer shroud) by soft sealing material ring and metal thereof and form, or form by soft sealing material ring and metal grommet (interior ring) thereof, it is characterized in that the described wall of tiing up ring and described grommet approaches, and only can retrain radially freely expanding with heat and contract with cold of described material ring.Described soft sealing material is yielding metal of a class and non-metal soft materials such as polytetrafluoroethylene (PTFE), rubber, Expanded graphite, lead, indium, and the end face of described material ring is sealing surface and is flat.
Initial sealing (contact) is in the sealing (contact) that is realized under atmospheric temperature pressure, to soft sealing material, is generally tightened to be tightly connected by finger and just can realize.From (swashing) sealing, be to lean on the pressure medium automated provisioning that is sealed, pressure is high more, and it is good more to seal, and still, therefore the pressure without initial sealing does not have self intensification to seal, do not have the self-excitation sealing without initial sealing.
Do not fill up it and tie up expanding with heat and contract with cold relatively of sealing material ring before the chamber, cry freely and expand with heat and contract with cold; Fill up it and tie up expanding with heat and contract with cold relatively of sealing material ring behind the chamber, cry and non-ly freely expand with heat and contract with cold.To tiing up the self-excitation seal ring, its outer cylinder is fettered by the pressure-bearing boundary, and when cylinder was subjected to the pressure medium excitation within it, its end face should produce Sealing Stress automatically.External pressure causes the grommet stress area and increases, and interior pressure causes the grommet stress area and subtracts, therefore, the soft metal grommet that wall is thin, the free cooling shrinkage that can resist outside soft sealing material ring does not influence the self-excitation sealing of material ring under little pressure again.Metal is tied up the wall of ring, and is thicker slightly than the wall of grommet, can not only stop the free expansion of sealing material ring fully, provides one to tie up the constant fit diameter in chamber relatively but also can be seal ring, guarantees that it not only can dismantle but also the radial clearance of the sealing of can eliminating the effects of the act repeatedly.
Tie up ring and grommet and can contain radially freely expanding with heat and contract with cold of sealing material ring, but can not contain the radially non-free expansion of sealing material ring.Vary with temperature again after tiing up the chamber when swelling when sealing material ring fills up, at first cause grommet and tie up the ring resilience distortion, cause the grommet plastic deformation then.Grommet can make sealing configuration adapt to how many variations of sealing material automatically with the distortion of tiing up ring.Grommet and the resiliently deformable of tiing up ring can make when returning normal temperature behind the sealing material ring experience high temperature, still can keep the initial sealing contact, guarantee that sealing never lost efficacy.When returning normal temperature after the grommet plastic deformation surpasses certain limit, the sealing material encircles and will lose the sealing contact and fine and close envelope inefficacy.That is to say that metal is tied up ring and grommet, no matter its material ring containment surfaces is cylinder or bent bus turning surface (this paper is called for short curved surface, and refers in particular to non-cylindricality turning surface), except that guaranteeing the satisfying the installation requirement of soft seal ring, can also suitably enlarge its operating temperature range.
Sealing material ring when only expanding with heat and contract with cold under the cylinder constraint of tiing up ring and grommet and control, generally can only flow vertically, can not radially flow.After end face had the pressure pocket bound constrained, material ring main body expansion flow process vertically was actually a high compressed process of ring.If tie up the ring or the material ring containment surfaces of grommet and be not full cylinder continuously but there is the interrupted cylinder in shoulder chamber, right angle at two ends or is rectangle song (bus revolution) face, so, when the body height of material ring is compressed to such an extent that can not keep normal temperature sealing contact, its shoulder sealing surface necessarily can also be kept normal temperature sealing contact, because shoulder chamber height is little more than material ring body height, the shrinkage variable is much smaller; That is to say that sealing material ring is a containment surfaces with the rectangle curved surface that the shoulder chamber is arranged,, bigger temperature variation adaptive capacity is arranged than with the full cylinder continuously that does not have the shoulder chamber being containment surfaces.If bowl-type cross section curve or the V-characteristic tiing up a material ring containment surfaces of encircling in ring and the grommet and be to protrude out the pan feeding ring are the turning surface of bus, the material ring containment surfaces of ring is the rectangle curved surface that there is shoulder chamber, right angle at two ends in addition, so, when the shrinkage vertically of material ring main body, the material ring will be by the inclined-plane of bowl-type curved surface or V-arrangement curved surface, press in the shoulder chamber, opposite, strengthen the sealing contact of shoulder, further improve the operating temperature range of seal ring.Wealthy more at the bottom of the bowl-type, it is strong more that the axial shoulder of curved surface is tied up function, and the skew force reflection function of curved surface is weak more, and vice versa; The bowl end is wealthy to be 0 V-arrangement curved surface, and axially shoulder is tied up a little less than the function, and the skew force reflection function is strong.With the camber line that protrudes out the pan feeding ring is the turning surface of bus, and existing enough skew force reflection functions have enough axial shoulders to tie up function again, and also causing the bow-shaped cross-section ring has better overall intensity, is the desirable material ring containment surfaces of tiing up ring.Therefore, described ring and the material ring containment surfaces of described grommet tied up is the turning surface of bus with the bowl-type cross section curve that radially protrudes into described material ring or V-characteristic or rectangular curve (comprising the curve near rectangle) or camber line preferably, the non-rectangle curved-line surface of revolution defines two ends has the material ring of oblique angle shoulder to tie up the cross section, chamber, and the rectangular curve turning surface defines two ends to be had the right angle shoulder or tie up the cross section, chamber near the material ring of right angle shoulder.In brief, described ring or the described grommet tied up be to the containment surfaces shape of described material ring, all is to cause the working sections of described material ring big centre, two is little vertically.Tie up the chamber for the material ring that big centre, two is little, when material ring main body is dwindled vertically,, cause four jiaos of local eminences and can effectively keep the required initial sealing contact of self-excitation sealing by the little space of large space retraction, when material ring main body increased vertically, cause sealed at both ends contact increased comprehensively simultaneously; More precisely, during no pressure medium, when its when relatively it is tied up the chamber and dwindles, the inboard two jiaos sealing contact of material ring is at first strengthened, and when its relative its was tied up the chamber increase, the sealing that the material ring outside is two jiaos contacts at first to be strengthened, can both effectively keep the required initial sealing contact conditions of self-excitation sealing, therefore, when pressure medium was arranged, the material ring can utilize its solidity wedge moving mobile reliably by the self-excitation seal operation with fluidity.
Normal temperature for the torrid zone and subtropics (lowest temperature is not less than 0 ℃) is used, and the described self-excitation seal ring of tiing up only need be tied up ring sometimes and not need grommet just can satisfy keeping, installation and job requirement.Use for the normal temperature in frigid zone and subfrigid zone (highest temperature is not higher than 20 ℃), described tie up the self-excitation seal ring only need grommet sometimes and need not tie up ring just can satisfy take care of, installation and job requirement.
Described have tie up in the cavity that the self-excitation seal ring can be installed in metal pressure-bearing boundary ring, with the self-excitation sealing gasket of boundary ring as the plane butt joint; At this moment, the height of tiing up ring and grommet of sealing material ring is not more than boundary ring height, and the height of sealing material ring is a bit larger tham boundary ring height, so that the initial sealing contact to be provided; Easily install, tiing up between ring and cavity to need certain assemblage gap, and this gap can fine and close envelope ultimate pressure reduce.The effective ways of eliminating this gap are to make to tie up ring and the boundary ring is integral, in other words, be will tie up ring ring material containment surfaces structure on the cavity wall and no longer tie up ring with separation; And in case so, it is a kind of self-excitation sealing gasket of tiing up, orthogonality distortion by the sealing material realizes sealing, form by soft sealing material ring and metal pressure-bearing boundary ring (outer shroud) thereof and metal grommet (interior ring), or form by soft sealing material ring and metal pressure-bearing boundary ring thereof, when it is characterized in that grommet is arranged, described grommet only can retrain radially freely expanding with heat and contract with cold of described material ring; During no grommet, described boundary ring is bent bus turning surface to the containment surfaces of described material ring.Equally, briefly, described boundary ring or described grommet are to the containment surfaces shape of described material ring, big centre, two is little vertically to cause the working sections of described material ring, specifically, the material ring containment surfaces of described boundary ring and described grommet is to be the turning surface of bus with the bowl-type cross section curve that radially protrudes into described material ring or V-characteristic or rectangular curve (comprising the curve near rectangle) or camber line, the non-rectangle curved-line surface of revolution defines two ends has the material ring of oblique angle shoulder to tie up the cross section, chamber, and the rectangular curve turning surface defines two ends to be had the right angle shoulder or tie up the cross section, chamber near the material ring of right angle shoulder.Macroscopical saw-tooth ring as fastening support is arranged on two end faces of described boundary ring, or the microcosmic saw-tooth ring as sealing is arranged, or both.
Described have tie up the tiing up in the chamber of ad hoc end face that the self-excitation seal ring also can be installed in butt joint, finish sealing butt joint with ad hoc end face with the full planar end surface of butt joint; At this moment, the height of tiing up ring and grommet of sealing material ring is not more than ties up the chamber degree of depth, and the height of sealing material ring is a bit larger tham ties up the chamber degree of depth, so that the initial sealing contact to be provided.Easily install, tiing up ring and tiing up between the chamber to need certain assemblage gap, and this gap can fine and close envelope ultimate pressure reduce.The effective ways of eliminating this gap are to make to tie up ring and tie up the chamber and be integral, or the ring material containment surfaces structure that will tie up ring is no longer tied up ring with separation tiing up on the wall of chamber; And in case so, it is a kind of self-excitation sealing configuration of tiing up, orthogonality distortion by the sealing material realizes sealing, by soft sealing material ring and metal is tied up the chamber and the metal grommet is formed, or tie up the chamber by soft sealing material ring and metal thereof and form, when it is characterized in that grommet is arranged, described grommet only can retrain radially freely expanding with heat and contract with cold of described material ring; During no grommet, the described chamber of tiing up is bent bus turning surface to the containment surfaces of described material ring.Equally, briefly, the described containment surfaces shape of tiing up chamber or described grommet to described material ring, big centre, two is little vertically to cause the working sections of described material ring, specifically, the described material ring containment surfaces of tiing up chamber and described grommet is to be the turning surface of bus with the bowl-type cross section curve that radially protrudes into described material ring or V-characteristic or rectangular curve (comprising the curve near rectangle) or camber line, the non-rectangle curved-line surface of revolution defines two ends has the material ring of oblique angle shoulder to tie up the cross section, chamber, and the rectangular curve turning surface defines two ends to be had the right angle shoulder or tie up the cross section, chamber near the material ring of right angle shoulder.Macroscopical saw-tooth ring as fastening support is arranged on the described exterior edge face of tiing up the chamber, or the microcosmic saw-tooth ring as sealing is arranged, or both.
According to the identical structural principle of aforementioned sealing configuration, also has a kind of self-excitation sealing configuration of tiing up, orthogonality distortion by the sealing material realizes sealing, by soft sealing material ring and metal is tied up the chamber and the metal grommet is formed, or tie up the chamber by soft sealing material ring and metal thereof and form, when it is characterized in that grommet is arranged, described grommet only can retrain radially freely expanding with heat and contract with cold of described material ring; During no grommet, there is a Poisson compensation conical surface bottom in the described chamber of tiing up or an oblique angle step or right angle step oral area is arranged, or the described chamber of tiing up has described conical surface bottom and described oblique angle step or right angle step oral area simultaneously.Macroscopical saw-tooth ring as fastening support is arranged on the described exterior edge face of tiing up the chamber, or the microcosmic saw-tooth ring as sealing is arranged, or both.
The design concept of institute of the present invention foundation is unprecedented, and therefore, technological progress that obtains and economic effect also must be unprecedented.
At first; finger is tightened or is tightened bolt or the screw thread of being tightly connected of the present invention near finger; no matter be to make sealing material with polytetrafluoroethylene (PTFE) or Expanded graphite; before material does not undergo phase transition or decomposes; no matter how low the many height of pressure are; as long as pressure part does not break; of the present invention being tightly connected can be leaked because of sealing itself to lose efficacy never; on the whole; be existing pad end face seal technology institute fully can not and, therefore, the seal protection and actual being tightly connected of a microcosmic saw-tooth ring can not be relaxed to the stage that finger is tightened in addition in addition; undoubtedly, of the present invention being tightly connected will cause a birth of leaking the carefree epoch.
Secondly, seal ring of the present invention is only required a chamber of tiing up that is fit to its installation on the diameter and the degree of depth, compare with existing plain cushion sealing technique, need not loaded down with trivial details bolt load design and installation and ensure program, compare with existing O shape ring sealing technique, need not loaded down with trivial details tie up the chamber design or select, therefore, the design of seal ring of the present invention or select for use low with application cost, risk is little, reliability is high.
Again secondly, seal ring of the present invention only branch Dimensions is regardless of the pressure rank, in other words, the seal ring of a Dimensions can satisfy the sealing demand of any pressure of this specification, therefore, compare with existing plain cushion sealing technique, the present invention is with the series specification of fine and close sealing and kind falls sharply and each single-piece increases severely in batches, significantly reduces manufacturing, stock and the application cost of Sealing.
Again secondly, each seal ring of the present invention is a kind of the structural similarity sealing unit with teflon or flexible graphite sealing material, and seven groups of competent whole end face seal tasks of sealing gasket can being competent at Ia, Ib, IIa, IIb, IIIa and six groups of sealing gaskets of IIIb of U.S. ASME B16.5 appointment or European EN1514-1～8 regulations, significantly reduce sealing gasket design, select for use, costs such as manufacturing, stock, use, maintenance.
At last, teflon and flexible graphite sealing material that the present invention uses, almost anti-all corrosion, aged deterioration hardly recyclablely utilizes again, therefore, can fill up reparation in addition, and seal ring has infinite life and does not have waste and the pollution of material due to discarded; So sealing do not have to be leaked and is not had waste and pollution due to the leakage, compares very energy-conserving and environment-protective of the technology of the present invention with existing plain cushion sealing technique in addition.
Description of drawings
Self-excitation seal ring, pad and the structure tied up of the present invention all is loop configuration, mostly express with the fragmentary sectional view of annular, and the inboard and the outside that axially and radially reach loop configuration of clearly expressing loop configuration with diameter dimension symbol Φ and dimension arrow.In all views, identical letter character is represented the identical or close element of function or structure or size.
Fig. 1 does not meet self-excitation seal ring 02 of the present invention, and its sealing material does not have radial constraint to tie up ring and grommet, and in the normal temperature scope, temperature variation just can cause its diameter and become big and can't install, or causes its diameter and diminish and radially assemblage gap occurs.
Fig. 2 is the seal ring 02 that does not meet Fig. 1 of the present invention, after the chamber is tied up in the work of packing into, a radial clearance C is arranged, to such an extent as under the pressure medium effect, the high Poisson distortion that subtracts will take place to increase in ring week as shown in phantom in FIG. and encircle seal ring 02.
Fig. 3 is a kind of radially self-excitation seal ring of constraint that has only according to the invention, is tied up ring 01 constraint outside its sealing material ring 02, and the external diameter size of seal ring is not subjected to influence of temperature change, can guarantee to remove and install repeatedly, can avoid radially assemblage gap again; In be subjected to grommet 03 constraint, the material ring can shrinkage cause to break away from ties up ring.
Fig. 4 be Fig. 3 according to the invention tie up the self-excitation seal ring, after the chamber is tied up in the work of packing into, tie up ring and guarantee not have radially assemblage gap, grommet guarantees to adapt to automatically what and shrinkage variation of sealing material, and does not influence the self-excitation sealing.
Fig. 5 is the structure explanatory drawing that the self-excitation seal ring of radial and axial constraint is arranged of the present invention, and Fig. 6 is the working principle explanatory drawing.
Fig. 7～12nd, the self-excitation seal ring of typically tiing up according to the invention, Figure 13～16th, their the partial structurtes enlarged view of tiing up shoulder and Poisson offset angle θ
n
Figure 17 is the self-excitation sealing gasket of tiing up according to the invention, and Figure 18 and Figure 19 are the partial enlarged drawings of its sealing configuration part; Figure 18, the outer containment surfaces of its material ring 02 is located to be tied up on the ring 01, is that separated type is tied up ring structure; Figure 19, the outer containment surfaces of its material ring 02 is located on the boundary ring 04, is that integrated type is tied up ring structure.
Figure 20 is the self-excitation sealing configuration (structure is on ad hoc end face A) of tiing up according to the invention, and Figure 21 and Figure 22 are the partial enlarged drawings of its sealing configuration part; Figure 21, the outer containment surfaces of its material ring 02 is located on the inwall of tiing up ring 01, is that separated type is tied up ring structure; Figure 22, the outer containment surfaces of its material ring 02 is located at tiing up on the wall of chamber on the ad hoc end A, is that integrated type is tied up ring structure.
Figure 23 be according to the invention another tie up self-excitation sealing configuration (structure is on ad hoc end face A), Figure 24 and Figure 25 are the partial enlarged drawings of its sealing configuration part; The chamber of tiing up of the material ring 02 of Figure 24 is one Poisson offset angle θ is arranged
nThe structure of conical surface bottom and right angle step oral area, the chamber of tiing up of the material ring 02 of Figure 25 is one the Poisson offset angle θ shown in the heavy line is arranged
nConical surface bottom adds the structure of right angle oral area, or one has the right angle (θ shown in the fine rule
n=0) bottom adds the structure of right angle step oral area.
Embodiment
Polytetrafluoroethylene (PTFE) commonly used shown in Figure 1 and rubber seal material ring 02, ring height h
1Be a bit larger tham it and tie up chamber height h, be installed in ad hoc end face A shown in Figure 2 tie up in the chamber after, by the butt joint connecting bolt of ad hoc end face A and full planar end surface B or the fastening initial sealing that the butt joint end face is provided of screw thread, provide the working seal of butt joint end face by the pressure of medium on inner cylinder.The medium-tight active area (the inner prop area of ring) of ring removes seal action area (end area of ring) greater than the medium of ring, and therefore, pressure high sealing more is good more.But, because the Φ d of ring
2With Φ d
3Cylinder does not have constraint, and therefore, variation of ambient temperature just can cause prefabricated ring external diameter Φ d
2Become to be greater than or less than to encircle and tie up chamber diameter of phi d
2'.If Φ is d
2＞Φ d
2', then ring can't installation in position; If Φ is d
2＜Φ d
2', then shown in the dotted line of Fig. 2, it is big with the pressure medium change that the radially assemblage gap C of ring will cause ring diameter, and ring diameter change senior general causes the ring height, and fine and close the envelope lost efficacy by Poisson's ratio μ reduction.
Expanded graphite, its coefficient of thermal expansion and contraction is more much lower or more near the coefficient of thermal expansion and contraction of metal than the coefficient of thermal expansion and contraction of polytetrafluoroethylene (PTFE) and rubber, in the ordinary temp scope, there are not installation question and work problem that above-mentioned polytetrafluoroethylene (PTFE) and rubber faces, but in much higher operating temperature range, the process from cold temperature to high temperature, along with the rising of temperature, the radial clearance of seal failure can appear causing equally in the outside of Expanded graphite seal ring.Say that again the Expanded graphite seal ring of metal ring constraint is arranged inside and outside having only, just be convenient to operational processes and dismounting maintenance repeatedly.
Therefore, as the seal ring of Fig. 3 and to assemble work in place shown in Figure 4, no matter the polytetrafluoroethylene (PTFE) of high-temperature coefficient sealing material ring 02 still be that the Expanded graphite sealing material of low-temperature coefficient encircles 02, all should there be metal to tie up the constraint of ring 01 and metal grommet 03, can guarantees that just it has desirable operability in processes such as circulation, keeping, installation, dismounting, maintenance.For not influencing the self-excitation sealing of sealing material ring 02, the wall of grommet 03 should approach to such an extent that only can contain radially relatively freely dwindling of material ring 02, far can not resist the rated pressure of the medium that is sealed.For guaranteeing that seal ring has a stable installation diameter of phi d
2, the wall thickness of tiing up ring 01 should be greater than the wall thickness of grommet 03.For guaranteeing ad hoc end face A and the adaptation of full planar end surface B and the initial sealing of the material ring after the driving fit, the height h of sealing material ring 02
1, tie up the height h in chamber and tie up the ring 01 and the height h of grommet 03
2H should be arranged
1＞h＞h
2Relation.Because the wall of grommet 03 only can be contained the radially free cooling shrinkage or the constraint of material ring 02, can not resist the radially non-free cooling shrinkage or the constraint of material ring 02, therefore, the installation compression of seal ring or thermal expansion compression can cause that elasticity takes place for grommet 03 or plastic radial is dwindled and material ring 02 can be changed or few variation of the many material of material by appropriate adaptive temperature.Tie up ring 01 and the resiliently deformable of grommet 03 and help material ring 02 and get back to by high temperature and can keep initial sealing behind the normal temperature and contact, therefore, tie up encircle 01 again can not be too thick.02 thermal expansion of material ring causes the radially plasticity process of dwindling of grommet 03, be actually material ring 02 and be compressed the process that its normal temperature height generation plasticity is dwindled that causes, therefore, when returning normal temperature behind certain high temperature, the height of material ring will be not enough to keep the initial sealing contact of material ring.That is to say that the self-excitation seal ring of tiing up shown in Figure 3 is limited to the adaptive capacity of temperature variation.
Can the absolute elastic compression amount of height of sealing material ring determine its end face provide or keep initial sealing, and the permanent absolute heat expansion variable of height or the permanent absolute cold temperature amount of contracting with highly be directly proportional, therefore, as the seal ring of Fig. 5 and to assemble work in place shown in Figure 6, when material ring 02 heat expansion causes that the cold temperature height of its main body h diminishes and just can not keep the initial sealing contact time, the height t of tiing up shoulder than the little a lot of part of h necessarily can also be kept initial sealing and contact.That is to say, to the axial flow of sealing material ring have tie up the shoulder constraint tie up the self-excitation seal ring, temperature variation is had higher adaptive capacity.
As shown in Figure 5, tiing up ring 01 V-arrangement material ring containment surfaces is with wealthy h at the bottom of the bowl
4=0 bowl-type curve (V-characteristic) is the surface of revolution of bus, and the rectangle material ring containment surfaces of grommet 03 is with the wealthy h of the rim of a bowl
2=bowl wealthy the h in the end
4The high h of=grommet
3Bowl-type curve (rectangular curve) be the surface of revolution of bus; Obviously, the rim of a bowl is wealthy constant, and the end of bowl-type curved surface is wealthy more, curved surface directly tie up or axially shoulder to tie up function strong more, it is weak more tiltedly to tie up function, vice versa.Directly the tiing up function and can improve to have and tie up the adaptive capacity (see before state) of self-excitation seal ring of curved surface to temperature variation, the function (the reaction force R on inclined-plane direct at the diagonal angle and) of tiltedly tiing up of curved surface is strengthened the sealing contact at diagonal angle again, therefore, curved surface can improve to have again and ties up the adaptability of self-excitation seal ring to temperature variation.
In fact, V-arrangement curved surface, arc-shaped curved surface and the bowl-type curved surface of tiing up ring 01 of Fig. 5 are at the Poisson offset angle that material ring 02 is provided two symmetries respectively; Although the θ ' of arc
nNot constant, but θ ' is totally arranged
3＞θ '
n＞θ "
3Because for the radially two-way sealing material ring that constraint is arranged, its radial dimension substantially no longer varies with temperature, promptly its Poisson offset angle face can not break away from the contact of the face of being tied up with it substantially because of temperature variation; For axial two-way part the sealing material ring of constraint is arranged,, have the Poisson offset angle face of suitable length also to be unlikely to meeting break away from the face of being tied up with it fully because of temperature variation contact even there is not radially constraint; Therefore, the such four-way of Fig. 5 all has V-arrangement curved surface, arc-shaped curved surface and the bowl-type curved surface Poisson offset angle of the sealing material ring of constraint all can be by θ
3Get.
Arc is tied up ring both can provide an overall thicker wall thickness to obtain stable installation dimension, eliminated the end contact gap when a yielding thin wall thickness in two ends can be provided again in order to assembling.Substantially, the arc string of arc-shaped curved surface changes sagitta and can change to constraint of material ring or Poisson offset angle size, to satisfy the different limits of working temperature or the demand of material for tiing up chamber height h.
Shown in the dotted line cross section of the grommet 03 of Fig. 6, when the volume of material ring 02 became volume greater than its cavity volume, the grommet middle part of weak strength was forced to introversion and causes tie up shoulder height degree t and diminish, and swallowed the long-pending and unlikely grommet end plasticity of the material ring body that has more and dwindled; When the volume of material ring relatively during the dwindling of its cavity volume, the grommet end that intensity is high forces its two ends to tie up the shoulder protuberance and the enhanced leaktightness contact, vacuum gap appears in the surface that causes outside its four jiaos, therefore, be that the grommet that atmospheric pressure or pressure medium all can cause middle bent stretches, the volume that spues and swallow before this, or press to the end by the middle part a material ring body that stores is long-pending, particularly press to four jiaos of shoulders, fine and close sealing-in is touched and is reached closely again stage closely.That is to say, a grommet that the rectangle curved surface that waits wall thickness of tiing up the chamber is arranged respectively is provided can for the grommet two ends, what can adapt to the material ring non-ly freely expands with heat and contract with cold or adapts to bigger limiting temperature variation; Tie up closed as open or Fig. 9 of Fig. 8 of chamber; The open chamber of tiing up is more suitable for polytetrafluoroethylene (PTFE) sealing material ring, and the enclosed chamber of tiing up is more suitable for Expanded graphite sealing material ring.
Radial and axial constraint or oblique comprehensive constraint to sealing material ring, it on the surface the harmful gap due to elimination foozle and temperature variation, so that keep the required initial sealing contact conditions of self-excitation sealing all the time at four jiaos that expect the ring cross section at least, the about area of beam that comes down to make on the whole the material ring is in that axially to be big centre, two little, so that under the pressure medium effect, make the material ring radially go into enough little space by large space, increase the axial deformation/strain/stress (response) of material ring, finish material fluidity compensation to material ring contact with the border compensate in, make the material ring fully transmit pressure, realize the self-excitation sealing by the liquid quadrature.
The basic permutation and combination of the material ring containment surfaces of the material ring containment surfaces of arc and rectangle can form 6 kinds of big middle circlet material in different substantially two area of beam approximately, respectively shown in Fig. 7～12.Here it is the typical structure of tiing up the self-excitation seal ring.The cross section horn structure of tiing up ring 01 of Fig. 7～9 is shown in the zoomed-in view 13 of its local I.Figure 10～12 tie up the ring 01 directly tie up shoulder structure shown in the zoomed-in view 14 of its local I I, a θ can be provided according to the difference of sealing material
1Or θ
2Poisson offset angle θ
n, improve the self-excitation sealing of tiing up the shoulder position; But work as h
3/ d
3Too hour, θ
1And θ
2Not quite, can only require to tie up the ring end face not evagination and or flat or nick.For the grommet 03 of Fig. 8, Fig. 9, Figure 11 and Figure 12, it directly ties up the shoulder structure shown in the zoomed-in view 15 and 16 of local I II and IV, can form a θ in assembling or in the work automatically
1Or θ
2Raising tie up the Poisson offset angle θ of shoulder self-excitation sealing
n, therefore, only require in the manufacturing to tie up and take on not that evagination gets final product.Comparatively speaking, the two ends weak strength of the grommet of Fig. 7 and Figure 10, the two ends intensity height of the grommet of Fig. 8, Fig. 9, Figure 11 and Figure 12, therefore, both have positive and negative opposite Poisson offset angle, the former has the taste that allows the ring material to free in and out wedge angle, and the latter has and only permitted ring and expect to advance, mustn't encircle the taste of expecting the shoulder chamber, but all is to strengthen tiing up the self-excitation sealing of shoulder position.
The ring of tiing up of tiing up the self-excitation seal ring is arranged, and can be separated type as Figure 18 and Figure 21, is independently; Can be all-in-one-piece as Figure 19, Figure 22, Figure 24 and 25 also, tie up ring and tie up the chamber with it and be integral, no longer be independently.Separated type is tied up ring structure and is tied up to have more between the chamber and need to consider the gap of offsetting automatically together tiing up ring and its, and integrated type is tied up ring structure does not have this road gap affects, and maximal work pressure is higher.The butt end that seal ring is arranged is ad hoc end (A) or sealed end, and the end that requires to dock with it is full flush end (B) or sealed end.Microcosmic sealing saw-tooth ring (the 05th, its flank of tooth, the 06th, its land) can be arranged, its tooth pitch (X on ad hoc end face
s)/tooth depth (Z
t)=20～500 are used to provide the repetition metallic seal, increase the structural reliability of sealing; Also can there be macroscopic view to support saw-tooth ring (the 05th, its flank of tooth, the 07th, its land), be used to provide the fastening support of connection, eliminate the interface solderless wrapped connection and touch the circle upset, simplify fastening program is installed, guarantee to seal the uniformity of contact, increase the reliability of sealing.
Of the present invention have an internal diameter Φ d that ties up the self-excitation seal ring
3Be the surplus rounding value of advancing the external diameter of pipe (Φ A) of the EN1092-1 Table A-1 behind the rounding, seal ring wall thickness (a) is to get the inferior minimum wall thickness (MINI W.) of EN1092-1 Table A-1 by being incremented to 11 ground, and seal ring external diameter Φ d is promptly arranged
2=Φ d
3+ 2a; Φ d on the ad hoc end face A
1/ Φ K/ Φ D
o/ n-Φ L is the relevant regulations size of EN1092-1.Therefore, tie up the self-excitation seal ring by selfsealings work in addition, the flange of a Dimensions can satisfy the sealing demand of any pressure of this specification with seal ring, in other words, flange with seal ring or the sealing unit only the branch specification be regardless of the pressure rank, be exactly total and the coaxality franchise half value of its corresponding metal tube wall thickness value flange manufacturing and installation.
The flange of the present invention application size Φ d of seal ring
3/ Φ d
2/ a/h such as following table are listed, h=ka wherein, k＞1+a/d
3, be to guarantee that the seal action area (the inner prop area of ring) of medium on seal ring removes seal action area (end area of ring) greater than it forever, guarantee that promptly the sealing of seal ring is kept Coefficient m forever greater than 1, can keep reliable sealing all the time.
Dimensional units is mm
| DN | 10 | 15 | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 |
| NPS | 3/8 | 1/2 | 3/4 | 1 | 1-1/4 | 1-1/2 | 2 | 2-1/2 | 3 | 4 | 5 | 6 | 8 |
| External diameter of pipe | 17.2 | 21.3 | 26.9 | 33.7 | 42.4 | 48.3 | 60.3 | 76.1 | 88.9 | 114.3 | 139.7 | 168.3 | 219.1 |
| Φd 3 | 18 | 22 | 27 | 34 | 43 | 49 | 61 | 77 | 89 | 115 | 140 | 169 | 220 |
| Φd 2 | 22 | 26 | 32.2 | 40.4 | 49.4 | 55.4 | 68.2 | 84.2 | 98 | 124 | 151.2 | 181.6 | 234 |
| a | 2 | 2 | 2.6 | 3.2 | 3.2 | 3.2 | 3.6 | 3.6 | 4.5 | 4.5 | 5.6 | 6.3 | 7 |
| h | 2.6 | 2.6 | 3.4 | 4.1 | 4.1 | 4.1 | 4.5 | 4.5 | 5.6 | 5.6 | 6.9 | 7.8 | 8.6 |
| DN | 250 | 300 | 350 | 400 | 450 | 500 | 600 | 700 | 800 | 900 | 1000 | 1200 | 1400 |
| NPS | 10 | 12 | 14 | 16 | 18 | 20 | 24 | 28 | 32 | 36 | 40 | 48 | 56 |
| External diameter of pipe | 273 | 323.9 | 355.6 | 406.4 | 457 | 508 | 610 | 711 | 813 | 914 | 1016 | 1219 | 1422 |
| Φd 3 | 273 | 324 | 356 | 407 | 457 | 508 | 610 | 711 | 813 | 914 | 1016 | 1219 | 1422 |
| Φd 2 | 287 | 340 | 372 | 423 | 473 | 524 | 626 | 727 | 829 | 930 | 1032 | 1237 | 1440 |
| a | 7 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 9 | 9 |
| h | 8.6 | 9.8 | 9.8 | 9.8 | 9.8 | 9.8 | 9.8 | 9.8 | 9.8 | 9.8 | 9.8 | 10.9 | 10.9 |
| DN | 1600 | 1800 | 2000 | 2200 | 2400 | 2600 | 2800 | 3000 | 3200 | 3400 | 3600 | 3800 | 4000 |
| NPS | 64 | 72 | 80 | 88 | 96 | 104 | 112 | 120 | 128 | 136 | 144 | 152 | 160 |
| External diameter of pipe | 1626 | 1829 | 2032 | 2235 | 2438 | 2620 | 2820 | 3020 | 3220 | 3420 | 3620 | 3820 | 4020 |
| Φd 3 | 1626 | 1829 | 2032 | 2235 | 2438 | 2620 | 2820 | 3020 | 3220 | 3420 | 3620 | 3820 | 4020 |
| Φd 2 | 1646 | 1851 | 2054 | 2257 | 2460 | 2642 | 2842 | 3042 | 3242 | 3442 | 3642 | 3842 | 4042 |
| a | 10 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 |
| h | 12.1 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 |
It should be noted that, first, this specification relates to the description that sealing material ring or the relative metal of material are tied up " the expanding with heat and contract with cold " in chamber, and it is positive situation that literal meaning meets the material temperature coefficient difference, and this says the situation of " pyrocondensation cold expanding " when negative but also should make a general reference the material temperature coefficient difference; Second, sealing configuration of the present invention all discloses by malleation (antivacuum) sealing configuration, be that it ties up that ring 01 is 02 outer at material ring, grommet 03 encircles in 02 at material, but, is that axis of symmetry ground symmetry exchanges with the cross section of tiing up ring 01 and grommet 03 with the perpendicular bisector that seals ring wall size a, and positive seal ring of the present invention, pad and structure are exactly negative pressure of the present invention (vacuum) seal ring, pad and structure.
Claims (13)
1. tie up the self-excitation seal ring for one kind, orthogonality distortion by the sealing material realizes sealing, tie up ring (outer shroud) and metal grommet (interior ring) is formed by soft sealing material ring and metal thereof, or tie up ring (outer shroud) by soft sealing material ring and metal thereof and form, or form by soft sealing material ring and metal grommet (interior ring) thereof, it is characterized in that the described wall of tiing up ring and described grommet approaches, and only can retrain radially freely expanding with heat and contract with cold of described material ring.
One kind by claim 1 tie up the self-excitation seal ring, it is characterized in that the described containment surfaces shape of tiing up ring or described grommet to described material ring, big centre, two is little vertically to cause the working sections of described material ring.
3. tie up the self-excitation seal ring by claim 1 or claim 2 for one kind, it is characterized in that described ring and the material ring containment surfaces of described grommet tied up is to be the turning surface of bus with the bowl-type cross section curve that radially protrudes into described material ring or V-characteristic or rectangular curve (comprising the curve near rectangle) or camber line, the non-rectangle curved-line surface of revolution defines two ends has the material ring of oblique angle shoulder to tie up the cross section, chamber, and the rectangular curve turning surface defines two ends to be had the right angle shoulder or tie up the cross section, chamber near the material ring of right angle shoulder.
4. tie up the self-excitation sealing gasket for one kind, orthogonality distortion by the sealing material realizes sealing, form by soft sealing material ring and metal pressure-bearing boundary ring (outer shroud) thereof and metal grommet (interior ring), or form by soft sealing material ring and metal pressure-bearing boundary ring thereof, when it is characterized in that grommet is arranged, described grommet only can retrain radially freely expanding with heat and contract with cold of described material ring; During no grommet, described boundary ring is bent bus turning surface to the containment surfaces of described material ring.
One kind by claim 4 tie up the self-excitation sealing gasket, it is characterized in that described boundary ring or described grommet containment surfaces shape to described material ring, big centre, two is little vertically to cause the working sections of described material ring.
6. tie up the self-excitation sealing gasket by claim 4 or claim 5 for one kind, the material ring containment surfaces that it is characterized in that described boundary ring and described grommet is to be the turning surface of bus with the bowl-type cross section curve that radially protrudes into described material ring or V-characteristic or rectangular curve (comprising the curve near rectangle) or camber line, the non-rectangle curved-line surface of revolution defines two ends has the material ring of oblique angle shoulder to tie up the cross section, chamber, and the rectangular curve turning surface defines two ends to be had the right angle shoulder or tie up the cross section, chamber near the material ring of right angle shoulder.
One kind by claim 4 or claim 5 tie up the self-excitation sealing gasket, it is characterized in that having on two end faces of described boundary ring macroscopical saw-tooth ring, or the microcosmic saw-tooth ring as sealing arranged as fastening support, or both.
8. tie up the self-excitation sealing configuration for one kind, orthogonality distortion by the sealing material realizes sealing, by soft sealing material ring and metal is tied up the chamber and the metal grommet is formed, or tie up the chamber by soft sealing material ring and metal thereof and form, when it is characterized in that grommet is arranged, described grommet only can retrain radially freely expanding with heat and contract with cold of described material ring; During no grommet, the described chamber of tiing up is bent bus turning surface to the containment surfaces of described material ring.
One kind by claim 8 tie up the self-excitation sealing configuration, it is characterized in that the described containment surfaces shape of tiing up chamber or described grommet to described material ring, big centre, two is little vertically to cause the working sections of described material ring.
10. tie up the self-excitation sealing configuration by claim 8 or claim 9 for one kind, it is characterized in that the described material ring containment surfaces of tiing up chamber and described grommet is is the turning surface of bus with the bowl-type cross section curve that radially protrudes into described material ring or V-characteristic or rectangular curve (comprising the curve near rectangle) or camber line, the non-rectangle curved-line surface of revolution defines two ends has the material ring of oblique angle shoulder to tie up the cross section, chamber, and the rectangular curve turning surface defines two ends to be had the right angle shoulder or tie up the cross section, chamber near the material ring of right angle shoulder.
11. one kind by claim 8 or claim 9 tie up the self-excitation sealing configuration, it is characterized in that having on the described exterior edge face of tiing up the chamber macroscopical saw-tooth ring, or the microcosmic saw-tooth ring as sealing arranged as fastening support, or both.
12. tie up the self-excitation sealing configuration for one kind, orthogonality distortion by the sealing material realizes sealing, by soft sealing material ring and metal is tied up the chamber and the metal grommet is formed, or tie up the chamber by soft sealing material ring and metal thereof and form, when it is characterized in that grommet is arranged, described grommet only can retrain radially freely expanding with heat and contract with cold of described material ring; During no grommet, there is a Poisson compensation conical surface bottom in the described chamber of tiing up or an oblique angle step or right angle step oral area is arranged, or the described chamber of tiing up has described conical surface bottom and described oblique angle step or right angle step oral area simultaneously.
13. one kind by claim 12 tie up the self-excitation sealing configuration, it is characterized in that having on the described exterior edge face of tiing up the chamber macroscopical saw-tooth ring, or the microcosmic saw-tooth ring as sealing arranged as fastening support, or both.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010195142.XA CN102261472B (en) | 2010-05-24 | 2010-05-24 | Tie up self-excitation sealing ring, pad and structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010195142.XA CN102261472B (en) | 2010-05-24 | 2010-05-24 | Tie up self-excitation sealing ring, pad and structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102261472A true CN102261472A (en) | 2011-11-30 |
| CN102261472B CN102261472B (en) | 2015-12-09 |
Family
ID=45008235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010195142.XA Expired - Fee Related CN102261472B (en) | 2010-05-24 | 2010-05-24 | Tie up self-excitation sealing ring, pad and structure |
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| Country | Link |
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| CN (1) | CN102261472B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108547950A (en) * | 2018-01-01 | 2018-09-18 | 保集团有限公司 | The bar of triangular loop seals |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04191571A (en) * | 1990-11-26 | 1992-07-09 | Mitsubishi Cable Ind Ltd | Seal for low temperature |
| CN2345780Y (en) * | 1997-08-19 | 1999-10-27 | 黄毅 | Self-expansion sealing pad |
| US20030080517A1 (en) * | 2001-11-01 | 2003-05-01 | Federal-Mogul World Wide, Inc. | Spiral wound cylinder head gasket |
| US6739595B1 (en) * | 2002-07-01 | 2004-05-25 | Dana Corporation | Self-energizing combustion seal flange |
| WO2007087643A2 (en) * | 2006-01-28 | 2007-08-02 | Leader Holdings, Llc | Low stress / anti-buckling spiral wound gasket |
-
2010
- 2010-05-24 CN CN201010195142.XA patent/CN102261472B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04191571A (en) * | 1990-11-26 | 1992-07-09 | Mitsubishi Cable Ind Ltd | Seal for low temperature |
| CN2345780Y (en) * | 1997-08-19 | 1999-10-27 | 黄毅 | Self-expansion sealing pad |
| US20030080517A1 (en) * | 2001-11-01 | 2003-05-01 | Federal-Mogul World Wide, Inc. | Spiral wound cylinder head gasket |
| US6739595B1 (en) * | 2002-07-01 | 2004-05-25 | Dana Corporation | Self-energizing combustion seal flange |
| WO2007087643A2 (en) * | 2006-01-28 | 2007-08-02 | Leader Holdings, Llc | Low stress / anti-buckling spiral wound gasket |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108547950A (en) * | 2018-01-01 | 2018-09-18 | 保集团有限公司 | The bar of triangular loop seals |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102261472B (en) | 2015-12-09 |
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Effective date of registration: 20150114 Address after: Wenzhou Yongzhong street of Longwan District of Zhejiang province 325024 City Huaxia valve Applicant after: Zhejiang Huaxia Valve Co., Ltd. Applicant after: Xu Changxiang Applicant after: DONGTOU HUAXIA VALVE CO., LTD. Address before: Wenzhou Yongzhong street of Longwan District of Zhejiang province 325024 City Huaxia valve Applicant before: Zhejiang Huaxia Valve Co., Ltd. Applicant before: Xu Changxiang Effective date of registration: 20150114 Address after: Wenzhou Yongzhong street of Longwan District of Zhejiang province 325024 City Huaxia valve Applicant after: Zhejiang Huaxia Valve Co., Ltd. Applicant after: Xu Changxiang Applicant after: DONGTOU HUAXIA VALVE CO., LTD. Address before: Wenzhou Yongzhong street of Longwan District of Zhejiang province 325024 City Huaxia valve Applicant before: Zhejiang Huaxia Valve Co., Ltd. Applicant before: Xu Changxiang |
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