CN202510707U - Metal gasket - Google Patents
Metal gasket Download PDFInfo
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- CN202510707U CN202510707U CN2011205757128U CN201120575712U CN202510707U CN 202510707 U CN202510707 U CN 202510707U CN 2011205757128 U CN2011205757128 U CN 2011205757128U CN 201120575712 U CN201120575712 U CN 201120575712U CN 202510707 U CN202510707 U CN 202510707U
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- 239000002184 metal Substances 0.000 title abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 86
- 230000000694 effects Effects 0.000 claims abstract description 22
- 239000012530 fluid Substances 0.000 claims abstract description 15
- 238000012856 packing Methods 0.000 claims description 21
- 238000013461 design Methods 0.000 claims description 9
- 230000003321 amplification Effects 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 7
- 238000011161 development Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
- 238000005474 detonation Methods 0.000 description 2
- 239000003721 gunpowder Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
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Abstract
本实用新型公开的金属密封垫属超高压密封件技术领域，该密封垫是具有自紧超高压动态密封结构的密封垫，其结构是：该密封垫呈形中空内圆处开口的圆环体，密封垫圆环上下面各有圆环上下面成体对称的一个二级密封圆环体及相连的一个一级密封圆环体，两圆环体交界处表面形成一个被动增压圆弧槽，使该密封垫中空开口圆环体上下面各构成一个挠性圆环、还使二级密封圆环体和一级密封圆环体的中空内平面构成轴向增压圆环面，增压公式P1＝P2/(1-K)，P1密封面处流体产生的密封比压-压强，P2所密封的流体压强，K为比例系数，取值范围：0.2～0.6，该密封垫优点有：能自动跟踪，调节密封比压，动态增压与密封效果显著，这种密封垫的安装结构简单，使用方便，可重复使用，成本低廉，值得采用和推广。
The metal gasket disclosed by the utility model belongs to the technical field of ultra-high pressure seals. The gasket is a gasket with a self-tightening ultra-high pressure dynamic sealing structure. A ring body with an opening at the inner circle of the hollow shape. The upper and lower parts of the gasket ring have a secondary sealing ring body symmetrical to the upper and lower rings and a connected first-level sealing ring body. The junction of the two ring bodies A passive pressurized arc groove is formed on the surface, so that the upper and lower sides of the hollow open ring body of the gasket form a flexible ring, and the hollow inner plane of the second-level sealing ring body and the first-level sealing ring body form a shaft. To the pressurized toroidal surface, the pressurization formula P 1 =P 2 /(1-K), the sealing specific pressure-pressure produced by the fluid at the sealing surface of P 1 , the pressure of the fluid sealed by P 2 , K is the proportional coefficient, take Value range: 0.2～0.6. The advantages of this gasket are: automatic tracking, adjustment of sealing specific pressure, dynamic pressurization and sealing effect are remarkable, the installation structure of this gasket is simple, easy to use, reusable, low cost, worth Adoption and promotion.
Description
One. technical field
The disclosed metallic gasket of the utility model belongs to superhigh pressure sealing part technical field; What be specifically related to is a kind of metallic gasket with self-tightening ultrahigh pressure structure; This metallic gasket can be applied to the gunpowder detonation and produce the simulation gun pressure generator of pressure or the oil pressure demarcation machine external equipment of press liquid generation pressure, or the seal aspect of other high pressure or extra-high tension unit.
Two. background technique
In extra-high tension unit, the superhigh pressure sealing of equipment is the important content in the extra-high tension unit development process always.To the development of some extra-high tension units, like the development that the development and the oil pressure of simulation gun pressure generator are demarcated the machine external equipment, these all are extra-high tension units, and the seal request of hyperpressure is all arranged.
Simulation gun pressure generator can be simulated the gun pressure change procedure in the cannon emission.It is that the transient high temperature, the pressurized gas that utilize the gunpowder detonation to produce break through prefabricated diaphragm; Produce with climbing speed like the cannon gun pressure class signal big; The monopulse pressure signal that lowering speed is little; The pressure amplitude of signal between 80MP～600MP, pulsewidth between 10ms～20ms, about 2ms of rise time.The pressure of this variation acts on the gun pressure testing instrument that is calibrated and three standard transducers, calibrates the gun pressure testing instrument with the measured value of three standard transducers.The surge pressure scope of this calibration equipment is between 80MP ∽ 600MP.Inner in order to be sealed in the testing instrument that is calibrated in simulation gun pressure generator, need development can seal the seal structural part of ultrahigh pressure.
Oil pressure is demarcated the machine pressure range at 50MP ∽ 600MP, and the highly pressurised liquid that utilizes oil pressure demarcation machine to produce comes calibrating sensors.Also can utilize highly pressurised liquid to strain gauge transducer and capacitive sensor on-load pressure load, come calibration strain formula sensor and capacitive transducer.Utilize oil pressure demarcation machine to produce highly pressurised liquid work, will develop the peripheral unit that docks of the machine of demarcating with oil pressure, in order to keep the stability of highly pressurised liquid, peripheral unit needs the superhigh pressure sealing requirement, needs development superhigh pressure sealing pad.In this two kind equipment, generally use single high pressure sealing pad to be difficult to satisfy the seal request of compression shock and temperature shock.For the combination seal pad, if external pressure surpasses 200MP, temperature surpasses 100 ℃, and the non-metallic part in the combination seal pad can be destroyed by high temperature, pressurized gas.If select general metal for use,, need to increase outside connection pressure in order to guarantee sealing load; Make structure too heavy; Be difficult to dismounting, the gap between pulsation hyperpressure effect lower seal jumpy can change along with the variation of fluctuation pressure simultaneously, if sealing gasket self does not have certain pressure tracking and compensate function; Then hydrodynamic pressure will be revealed away through the gap that changes, and loses sealing effect.For overcoming these defectives, the present invention has designed a kind of metal self-tightening superhigh pressure sealing pad.The mounting structure of sealing pad is simple, and is easy to use, reusable, with low cost.Can also be applied on other high pressures or the hyperpressure equipment.
Three. summary of the invention
The purpose of the utility model invention is: to society this metallic gasket is provided; The sealing pad can guarantee sealing effect under ultrahigh pressure of pulsing and transient high temperature environment; The contact stress of sealing gasket can produce different contact stress along with the internal pressure difference, realizes the Seal of Equipment effect.
The technological scheme of the utility model is such: this metallic gasket; Technical characterstic is: this metallic gasket is the sealing gasket with self-tightening ultrahigh pressure dynamic seal (packing) structure; Described have self-tightening ultrahigh pressure dynamic seal (packing) structure and be: the sealing pad is the cirque body of
shape hollow inner circle opening; Sealing gasket annulus top and bottom respectively are designed with a secondary seal cirque body of annulus top and bottom adult symmetry and a primary seal cirque body that links to each other; Two cirque body intersections surface forms a passive supercharging arc groove annulus, and its passive supercharging arc groove annulus makes the cirque body top and bottom of sealing pad hollow open respectively constitute a flexible annulus, also make the toric hollow inner plane of secondary seal cirque body and primary seal constitute axial supercharging toroidal surface.The said structure characteristic of described metallic gasket constitutes the sealing gasket with self-tightening ultrahigh pressure dynamic seal (packing) structure.
According to above-described metallic gasket; Technical characterstic also has: a. sealing pad top and bottom adult symmetry a secondary seal inclined-plane cirque body of one 3 °-5 ° and a primary seal flat circle ring body that links to each other respectively arranged, the pressurized effect that the passive supercharging arc groove between two cirque body inwardly forms setting along the median vertical line of groove acts on the axial supercharging toroidal surface that cirque body hollow inner plane constitutes.Described passive supercharging arc groove inwardly forms the pressurized effect of setting along the median vertical line of groove, acts on the axial supercharging toroidal surface that cirque body hollow inner plane constitutes, and this is directly dynamically the supercharging amplification and the effect of supercharging arc groove structure.B. described cirque body top and bottom respectively form a flexible annulus and constitute by being positioned at this outer toric remaining part in secondary seal inclined-plane of passive supercharging arc groove annulus.Described flexible annulus is positioned at outside the passive supercharging arc groove annulus, and the seal pressure-pressure that can make the I and II sealing surface is with being changed fast by fluid-encapsulated pressure change.
According to above-described metallic gasket; Technical characterstic also has: described have self-tightening ultrahigh pressure dynamic seal (packing) structure and constitute in detail and be: this metallic gasket is the circular of metallic case hollow inner circle opening; Sealing gasket hollow portion ring cross-section is
shape; The circular of hollow inner circle opening is the primary seal flat circle ring body of sealing pad top and bottom adult symmetry; The external connection of primary seal planar circular be 3 °-5 ° secondary seal inclined-plane cirque body of sealing pad top and bottom adults symmetry; Two cirque body intersections surface forms a passive supercharging arc groove annulus; The arc groove annulus along the median vertical line of groove inside be the axial supercharging toroidal surface that cirque body hollow inner plane constitutes; Axially the supercharging toroidal surface radially the cylindrical anchor ring form the outstanding body outer ring surface that radially reduces pressure; The arc groove annulus is outward the flexible annulus that one 3 °-5 ° the toric remaining part formation in secondary seal inclined-plane is respectively arranged of sealing pad top and bottom adult symmetry, and what flexible annulus connected is the ring end face formation radial pressure face of sealing pad annulus outermost.The detailed structure of described this metallic gasket makes it have self-tightening ultrahigh pressure dynamic seal (packing) structure characteristic fully to set forth clear.
According to above-described metallic gasket, technical characterstic also has: the toric hollow inner plane of the hollow inner plane of the described primary seal flat circle of a. ring body and secondary seal inclined-plane constitutes the axial supercharging toroidal surface of same horizontal plane.The toric hollow inner plane in the hollow inner plane of described primary seal flat circle ring body and secondary seal inclined-plane constitutes same horizontal plane, helps this metallic gasket and forms sealing contact surface.B. toric appearance inclined-plane, described secondary seal inclined-plane horizontal alignment down and the angle of 3 °-5 ° of radius vector outer inclines.Toric appearance inclined-plane, described secondary seal inclined-plane horizontal alignment down and the angle of 3 °-5 ° of radius vector outer inclines, this structure helps forming flexible preferably annulus.
According to above-described metallic gasket, technical characterstic also has: the centre distance formula of described passive supercharging arc groove is: d=(d
1+ d
2)/2 ... (1), in (1) formula: d
1Be metallic gasket cirque body internal diameter, d
2For the outstanding body of metallic gasket radially reduce pressure the outer ring surface external diameter, that is to say flexible internal radius; The annulus width formula that passive supercharging arc groove forms is: B
1=K x B
2(2), in (2) formula: B
2Be axial supercharging toroidal surface width, K is the specific pressure coefficient, the K span: 0.2～0.6, and B
2=(d
2-d
1)/2 ... (3), by specific pressure-pressure of producing at the sealing surface place of fluid-encapsulated pressure be:
(4), P
2For fluid-encapsulated pressure, the specific pressure of sealing surface-pressure P
1Can be along with the pressure P of institute's sealed fluid flow
2Variation and change, make seal pressure bigger than fluid pressure all the time, reach the purpose of dynamic supercharging.Formula (1)～(4) promptly are corresponding supercharging calculating or the design formulas that forms axial supercharging toroidal surface of the toroidal surface of passive supercharging arc groove.Guarantee P during design
1Allowable stress less than the metallic seal cushion material.Described formula (1)～(4) have provided the corresponding quantitative Analysis or the design formula that forms the supercharging of axial supercharging toroidal surface of toroidal surface of passive supercharging arc groove.
According to above-described metallic gasket; Technical characterstic also has: the supercharging amplification of the axial supercharging toroidal surface of the corresponding formation of the toroidal surface of the described passive supercharging arc groove of this metallic gasket and the toroidal surface effect of described passive supercharging arc groove form the dynamic supercharging of flexible annulus and transmit automatically, make this metallic gasket become the metallic gasket of self-tightening ultrahigh pressure dynamic seal (packing) structure.
The metallic gasket advantage of the utility model has: 1. this metallic gasket is because the passive supercharging arc groove annulus that has two cirque body intersections surface to form; This arc groove annulus along the median vertical line of groove inside be the axial supercharging toroidal surface that cirque body hollow inner plane constitutes, pressurized effect is (4) by formula: P
1=P
2/ (1-K) calculate the K span: 0.2～0.6, axially the toroidal surface pressurized effect is significant; 2. this metallic gasket is because the passive supercharging arc groove annulus that has two cirque body intersections surface to form; The arc groove annulus is outward the flexible annulus that the toric remaining part in secondary seal inclined-plane constitutes; The rigidity of this flexible annulus is minimum in whole sealing gasket; The specific pressure that can guarantee axial seal face can change along with the pressure change of institute's sealed fluid flow, reaches the purpose of dynamic adjustment seal pressure; 3. the toroidal surface of passive supercharging arc groove is corresponding to be formed the supercharging amplification of axial supercharging toroidal surface and has flexible annulus that seal pressure dynamic following fluid pressure is changed because this metallic seal is lined with, and makes this metallic gasket become the metallic gasket of self-tightening ultrahigh pressure dynamic seal (packing) structure; 4. the mounting structure of sealing pad is simple, and is easy to use, reusable, with low cost.This metallic gasket is worth adopting and promoting.
Four. description of drawings
The Figure of description of the utility model has 3 width of cloth:
Fig. 1 is the metallic gasket sectional view with self-tightening ultrahigh pressure dynamic seal (packing) structure;
Fig. 2 is the dimensional structure schematic representation of the dynamic supercharging sealing surface of this metallic gasket self-tightening ultrahigh pressure;
Fig. 3 is the dynamic supercharging sealing of the self-tightening ultrahigh pressure of this a metallic seal pad mounting structure sectional view.
In each figure, adopted unified label, promptly same object is used same label in each figure.In three figure: inner cylindrical surface 1; Primary seal plane 2; Passive supercharging arc groove 3; Secondary seal inclined-plane 4; Flexible annulus 5; Cantilever is relief 6 radially; Radial pressure face 7; Axial supercharging toroidal surface 8; Cavity 1 is 9; Cavity 2 is 10; The high-pressure liquid 11 that is sealed; Metal self-tightening ultrahigh pressure dynamic seal (packing) pad 12.
Five. embodiment
The metallic gasket non-limiting examples of the utility model is following:
Embodiment one. metallic gasket
This routine metallic gasket is the sealing gasket with self-tightening ultrahigh pressure dynamic seal (packing) structure; Concrete structure is united by Fig. 1～Fig. 3 and is illustrated; Fig. 1 illustrates the metallic gasket sectional view with self-tightening ultrahigh pressure dynamic seal (packing) structure; As shown in Figure 1; Having self-tightening ultrahigh pressure dynamic seal (packing) structure is: the sealing pad is the cirque body of
shape hollow inner circle opening; 1 is inner cylindrical surface; Sealing pad annulus top and bottom respectively are designed with a secondary seal cirque body 4 of annulus top and bottom adult symmetry and a primary seal cirque body 2 that links to each other; Two cirque body, 4,2 intersections surfaces forms a passive supercharging arc groove annulus 3, and its passive supercharging arc groove annulus 3 makes the cirque body top and bottom of sealing pad hollow open respectively constitute a flexible annulus 5, also make the hollow inner plane of secondary seal cirque body 4 and primary seal cirque body 2 constitute axial supercharging toroidal surface 8.The pressurized effect that a primary seal flat circle ring body that one 3 °-5 ° secondary seal inclined-plane cirque body 4 is respectively arranged and link to each other 2, two cirque body 4 of this routine sealing gasket top and bottom adult symmetry, the passive supercharging arc groove between 2 inwardly form setting along the median vertical line of groove 3 acts on the axial supercharging toroidal surface that cirque body 4,2 hollow inner planes constitute 8.The hollow inner plane of the primary seal flat circle ring body 2 that this is routine and the hollow inner plane of secondary seal inclined-plane cirque body 4 constitute the axial supercharging toroidal surface 8 of same horizontal plane.The hollow inner plane of the hollow inner plane of described primary seal flat circle ring body 2 and secondary seal inclined-plane cirque body 4 constitutes same horizontal plane, helps this metallic gasket and forms sealing contact surface.The passive supercharging arc groove 3 of this example inwardly forms the pressurized effect of setting along the median vertical line of groove, acts on the axial supercharging toroidal surface 8 that cirque body 4,2 hollow inner planes constitute, and this is directly dynamically the supercharging amplification and the effect of supercharging arc groove structure.These routine cirque body top and bottom respectively form a flexible annulus 5 and are made up of the remaining part that is positioned at this secondary seal inclined-plane cirque body 4 outside the passive supercharging arc groove annulus 3.The flexible annulus 5 of this example is positioned at outside the passive supercharging arc groove annulus 3, can dynamically transmit the upper-lower seal end face of the pressurization of supercharging arc groove 3 to this metallic gasket, and the outside of flexible annulus 5 forms radial pressure face 7.The appearance inclined-plane horizontal alignment of described secondary seal inclined-plane cirque body 4 descends and radius vector allows 3 °-5 ° angle outward.The appearance inclined-plane horizontal alignment of the secondary seal inclined-plane cirque body 4 that this is routine down and the angle of 5 ° of radius vector outer inclines, this structure helps forming flexible preferably annulus 5.The said structure characteristic of the metallic gasket that this is routine constitutes the sealing gasket with self-tightening ultrahigh pressure dynamic seal (packing) structure.The detailed formation of self-tightening ultrahigh pressure dynamic seal (packing) structure that has of this example is: this metallic gasket is the circular of metallic case hollow inner circle opening; Sealing gasket hollow portion ring cross-section is
shape; The circular of hollow inner circle opening is the primary seal flat circle ring body 2 of sealing pad top and bottom adult symmetry; What connect outside the primary seal flat circle ring body 2 is 5 ° secondary seal inclined-plane cirque body 4 of sealing pad top and bottom adult symmetry; Two cirque body, 4,2 intersections surface forms a passive supercharging arc groove annulus 3; The arc groove annulus along the median vertical line of groove inside be the axial supercharging toroidal surface 8 that cirque body 4,2 hollow inner planes constitute; Axially supercharging toroidal surface 8 radially the cylindrical anchor ring form the outstanding body outer ring surface 6 that radially reduces pressure; The arc groove annulus is outward the flexible annulus 5 that the remaining part that one 5 ° secondary seal inclined-plane cirque body 4 is respectively arranged of sealing pad top and bottom adult symmetry constitutes, and what flexible annulus 5 connected is the ring end face formation radial pressure face 7 of sealing pad annulus outermost.The detailed structure of described this metallic gasket makes it have self-tightening ultrahigh pressure dynamic seal (packing) structure characteristic fully to set forth clear.Fig. 2 illustrates the dimensional structure schematic representation of the dynamic supercharging sealing surface of this metallic gasket self-tightening ultrahigh pressure, and the centre distance d formula of the passive supercharging arc groove 3 of this example is: d=(d
1+ d
2)/2 ... (1), in (1) formula: d
1Be metallic gasket cirque body internal diameter, d
2For the outstanding body of metallic gasket radially reduce pressure outer ring surface 6 external diameter, that is to say the internal diameter of flexible annulus 5.The annulus width B that passive supercharging arc groove 3 forms
1Formula is: B
1=K x B
2(2), in (2) formula: B
2Be the width of axial supercharging toroidal surface 8, K is a scaling factor, and the K span is 0.2～0.6, B
2=(d
2-d
1)/2 ... (3), by specific pressure-pressure of producing at the sealing surface place of fluid-encapsulated pressure be: P
1=P
2B
2/ B
2-B
1=P
2/ 1-K ... (4), P
2For fluid-encapsulated pressure, the specific pressure of sealing surface-pressure P
1Can be along with the pressure P of institute's sealed fluid flow
2Variation and change, make seal pressure-pressure bigger than fluid pressure all the time, reach the purpose of dynamic supercharging.Formula (1)～(4) promptly are the toroidal surface 3 corresponding supercharging calculating or the design formulas that form axial supercharging toroidal surface 8 of passive supercharging arc groove; According to the K span is 0.2～0.6, and the passive supercharging arc groove toroidal surface 3 corresponding pressurized effects that form axial supercharging toroidal surface 8 that calculate or design are 1.25～2.5 times approximately.This routine superhigh pressure sealing pad is made with spring steel 60SiMnA, existing higher elasticity proportional limit σ
s=1225MPa has certain rigidity requirement again, can satisfy the motive sealing of ultrahigh pressure≤600MP and the requirement of static seal, again can satisfied temperature≤300 ° impact requirement.The pressurized effect that a primary seal flat circle ring body that one 5 ° secondary seal inclined-plane cirque body 4 is respectively arranged and link to each other 2, two cirque body 4 of this example sealing gasket top and bottom adult symmetry, the passive supercharging arc groove 3 between 2 inwardly form setting along the median vertical line of groove acts on the axial supercharging toroidal surface 8 that cirque body 4,2 hollow inner planes constitute.Passive supercharging arc groove 3 inwardly forms the pressurized effect of setting along the median vertical line of groove, acts on the axial supercharging toroidal surface 8 that cirque body 4,2 hollow inner planes constitute, and this is directly dynamically the supercharging amplification and the effect of pressing the arc groove structure.These routine cirque body top and bottom respectively form a flexible annulus 5 and are made up of the remaining part that is positioned at this secondary seal inclined-plane cirque body 4 outside the passive supercharging arc groove annulus 3.Flexible annulus 5 is positioned at outside the passive supercharging arc groove annulus 3, can guarantee that the specific pressure of axial seal face can change along with the pressure change of institute's sealed fluid flow, reaches the purpose of dynamic adjustment seal pressure.Flexible annulus 5 outsides are radial pressure faces 7 of this metallic gasket.The mounting structure of this seal ring is as shown in Figure 3.Fig. 3 illustrates the dynamic supercharging sealing of the self-tightening ultrahigh pressure sectional view of this metallic seal pad mounting structure.As shown in Figure 3, cavity 1 is 9, and cavity 2 is 10, and the high-pressure liquid that is sealed is 11, and this routine metal self-tightening ultrahigh pressure dynamic seal (packing) pad is 12.Among Fig. 3, on cavity 1 (9), process a circular groove, the external diameter of this groove is that the outside dimension of sealing pad adds 0.2mm, and the internal diameter of this groove deducts 0.5mm for the sealing gasket internal diameter size, and groove depth is that sealing pad size height deducts 2mm-2.5mm.During installation; Earlier put into cavity 1 (9) to the high pressure sealing pad; Be pressed onto cavity 2 (10) on the metal self-tightening superhigh pressure sealing pad 12 again, apply certain initial pressure between cavity 1 (9) and the cavity 2 (10), make metal self-tightening superhigh pressure sealing pad 12 produce resiliently deformable; Two primary seal planes 2 up and down of metal self-tightening superhigh pressure sealing pad 12 closely contact with two cavitys (9), (10) with two secondary seal inclined-planes 4 at this moment, produce primary seal this moment.Inject the external high pressure fluid and get into cavity 1 (9) and cavity 2 (10); This moment, high-pressure spray was known from experience the radial clearance through cavity 1 (9) and metal self-tightening superhigh pressure sealing pad 12; Get in the interior ring of metal self-tightening superhigh pressure sealing pad 12; Because the pressure of fluid equates everywhere; The inner cylindrical surface 1, cantilever that hydrodynamic pressure can act on metal self-tightening superhigh pressure sealing pad 12 be relief 6, radial pressure face 7 and axially on the supercharging face 8 radially, because inner cylindrical surface 1 and the cantilever active force of relief 6 part of cancelling out each other radially, the cantilever that makes faces such as 1,2,4,6,8 surround mainly bears axial pressure from inside to outside.Simultaneously, because the area of axial supercharging face 8 is greater than the annulus area of passive supercharging arc groove 3 correspondences, the contact stress that makes axial supercharging face 8 affact the primary seal plane 2 of high pressure sealing pad through passive supercharging arc groove 3 increases.Guarantee during design that passive supercharging arc groove 3 corresponding annular width are 0.2～0.6 times of width of axial supercharging face 8, therefore, about 1.25～2.5 times of the contact stress on primary seal plane 2 than the pressure of fluid.Therefore, the contact stress of this high-pressure seal ring sealing surface is about more than 25% greater than hydrodynamic pressure all the time, reaches the purpose of high pressure sealing.Owing to contain dynamic supercharging flexible loop 5 on these metal self-tightening superhigh pressure sealing pad 12 top and bottom; Make the cantilever physical efficiency variation of fluid-responsive pressure rapidly that faces such as 1,2,4,6,8 surround; Make the sealing contact stress at sealing surface place be always about 1.25～2.5 times of hydrodynamic pressure; Realized realizing the dynamic seal (packing) function of super high pressure fluid from motion tracking and the requirement of regulating seal pressure.
Embodiment two. metallic gasket
This routine metallic gasket concrete structure can be united with Fig. 1～Fig. 3 etc. and illustrated, and metallic gasket that this is routine and embodiment's one metallic gasket difference has: 1. toric appearance inclined-plane, the secondary seal inclined-plane horizontal alignment of metallic gasket that should example down and the angle of 3 ° of radius vector outer inclines.2. the K span of metallic gasket that should example is 0.2 or 0.3 or 0.4; According to the K span is 0.2 or 0.3 or 0.4, and the passive supercharging arc groove toroidal surface 3 corresponding pressurized effects that form axial supercharging toroidal surface 8 that calculate or design are 1.25 times or 1.43 times or 1.67 times.All the other do not state this routine metallic gasket, are same as entirely described in the embodiment one, no longer repeat.
Embodiment three. metallic gasket
This routine metallic gasket concrete structure can be united with Fig. 1～Fig. 3 etc. and illustrated, and metallic gasket that this is routine and embodiment one, embodiment's two metallic gasket difference has: 1. toric appearance inclined-plane, the secondary seal inclined-plane horizontal alignment of metallic gasket that should example down and the angle of 4 ° of radius vector outer inclines.2. the K span of metallic gasket that should example is respectively 0.5 or 0.6; Be respectively 0.5 or 0.6 according to the K span, the passive supercharging arc groove toroidal surface 3 corresponding pressurized effects that form axial supercharging toroidal surface 8 that calculate or design are respectively 2 times or 2.5 times.All the other do not state this routine metallic gasket, are same as entirely described in embodiment one, the embodiment two, no longer repeat.
Claims (6)
1. metallic gasket; Be characterised in that: this metallic gasket is the sealing gasket with self-tightening ultrahigh pressure dynamic seal (packing) structure; Described have self-tightening ultrahigh pressure dynamic seal (packing) structure and be: the sealing pad is the cirque body of hollow inner circle opening; Sealing gasket annulus top and bottom respectively are designed with a secondary seal cirque body of annulus top and bottom adult symmetry and a primary seal cirque body that links to each other; Intersection surface, two cirque body surface forms a passive supercharging arc groove annulus, and its passive supercharging arc groove annulus makes the cirque body top and bottom of sealing pad hollow open respectively constitute a flexible annulus, also make the toric hollow inner plane of secondary seal cirque body and primary seal constitute axial supercharging toroidal surface.
2. metallic gasket according to claim 1 is characterised in that:
A. sealing pad top and bottom adult symmetry respectively has a secondary seal inclined-plane cirque body of one 3 °-5 ° and a primary seal flat circle ring body that links to each other, and the pressurized effect that the passive supercharging arc groove between two cirque body inwardly forms setting along the median vertical line of groove acts on the axial supercharging toroidal surface that cirque body hollow inner plane constitutes;
B. described cirque body top and bottom respectively form a flexible annulus and constitute by being positioned at the outer toric remaining part in secondary seal inclined-plane of passive supercharging arc groove annulus.
3. metallic gasket according to claim 2; Be characterised in that: described have self-tightening ultrahigh pressure dynamic seal (packing) structure and constitute in detail and be: this metallic gasket is the circular of metallic case hollow inner circle opening; The circular of hollow inner circle opening is the primary seal flat circle ring body of sealing pad top and bottom adult symmetry; The external connection of primary seal planar circular be 3 °-5 ° secondary seal inclined-plane cirque body of sealing pad top and bottom adults symmetry; Two cirque body intersections surface forms a passive supercharging arc groove annulus; The arc groove annulus along the median vertical line of groove inside be the axial supercharging toroidal surface that cirque body hollow inner plane constitutes; Axially the supercharging toroidal surface radially the cylindrical anchor ring form the outstanding body outer ring surface that radially reduces pressure, the arc groove annulus is outward the flexible annulus that respectively has one 3 °-5 ° the toric remaining part in secondary seal inclined-plane to constitute of sealing pad top and bottom adult symmetry, flexible annulus connects is that the ring end face of sealing pad annulus outermost forms the radial pressure face.
4. metallic gasket according to claim 3 is characterised in that:
The toric hollow inner plane in the hollow inner plane of a. described primary seal flat circle ring body and secondary seal inclined-plane constitutes the axial supercharging toroidal surface of same horizontal plane;
B. toric appearance inclined-plane, described secondary seal inclined-plane horizontal alignment down and the angle of 3 °-5 ° of radius vector outer inclines.
5. metallic gasket according to claim 4 is characterised in that: the centre distance formula of described passive supercharging arc groove is: d=(d
1+ d
2)/2 (1) are in (1) formula: d
1Be metallic gasket cirque body internal diameter, d
2For the outstanding body of metallic gasket radially reduce pressure the outer ring surface external diameter, that is to say flexible internal radius; The annulus width formula that passive supercharging arc groove forms is: B
1=KxB
2(2), in (2) formula: B
2Be axial supercharging toroidal surface width, K is a scaling factor, the K span: 0.2～0.6, and B
2=(d
2-d
1)/2 (3), the sealing surface place by maximum seal pressure-pressure that hydrodynamic pressure produces is:
In (4) formula: P
2By being wanted sealed fluid flow pressure, formula (1)～(4) promptly are corresponding supercharging calculating or the design formulas that forms axial supercharging toroidal surface of the toroidal surface of passive supercharging arc groove.
6. metallic gasket according to claim 5; Be characterised in that: the supercharging amplification of the axial supercharging toroidal surface of the corresponding formation of the toroidal surface of the described passive supercharging arc groove of this metallic gasket and the toroidal surface effect of described passive supercharging arc groove form the dynamic supercharging of flexible annulus and transmit automatically, make this metallic gasket become the metallic gasket of self-tightening ultrahigh pressure dynamic seal (packing) structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205757128U CN202510707U (en) | 2011-12-31 | 2011-12-31 | Metal gasket |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205757128U CN202510707U (en) | 2011-12-31 | 2011-12-31 | Metal gasket |
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| Publication Number | Publication Date |
|---|---|
| CN202510707U true CN202510707U (en) | 2012-10-31 |
Family
ID=47063194
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205757128U Expired - Fee Related CN202510707U (en) | 2011-12-31 | 2011-12-31 | Metal gasket |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107144586A (en) * | 2017-05-16 | 2017-09-08 | 四川大学 | A kind of two-stage supercharging device based on uniaxial loading |
-
2011
- 2011-12-31 CN CN2011205757128U patent/CN202510707U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107144586A (en) * | 2017-05-16 | 2017-09-08 | 四川大学 | A kind of two-stage supercharging device based on uniaxial loading |
| CN107144586B (en) * | 2017-05-16 | 2019-07-16 | 四川大学 | A two-stage booster device based on uniaxial loading |
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