CN202301936U - Axial double-way sealing structure of thin-wall flange chase mortise used in complicated working conditions - Google Patents
Axial double-way sealing structure of thin-wall flange chase mortise used in complicated working conditions Download PDFInfo
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- CN202301936U CN202301936U CN 201120358124 CN201120358124U CN202301936U CN 202301936 U CN202301936 U CN 202301936U CN 201120358124 CN201120358124 CN 201120358124 CN 201120358124 U CN201120358124 U CN 201120358124U CN 202301936 U CN202301936 U CN 202301936U
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Abstract
The utility model provides an axial double-way sealing structure of a thin-wall flange chase mortise used in complicated working conditions. Two circular grooves are arranged on the lower flange end face contacted with an upper flange. The circular groove on the outer side is a sealing groove for assembling a rubber sealing piece, and the circular groove on the inner side is a chase mortise for assembling a gasket. A protruding platform extends out from the upper flange end face at the position corresponding to the chase mortise for assembling the gasket and is embedded into the chase mortise for assembling the gasket, and a height value of the protruding platform is equal to a depth value of the chase mortise for assembling the gasket and larger than an inside gap value of a flange. The sealing problem of the sealing structure in strong corrosive medium environment under a deformation condition is solved, flange deformation is caused when the axial double-way sealing structure of the thin-wall flange chase mortise is used in a wide temperature range from low temperature to the maximum high temperature, and no residue is produced after the axial double-way sealing structure is used at the maximum high temperature in a sealing mode and the rubber sealing piece and a strong corrosive medium is contacted.
Description
Technical field
The utility model relates to a kind of flange seal structure, is specifically related to a kind of axial double sealing structure of thin-walled flange tongue-and-groove that is used for the complex working condition condition.
Background technique
Rubber seal is simple with its sealing configuration form, sealing reliability is high and receive application widely.Under the prerequisite that requires to allow in sealing technique, rubber seal always is first-selected scheme for sealing.Usually, according to requirements such as serviceability temperature, Environmental Conditions, sealing loads, select corresponding rubber seal for use, flange facing reaches tight seamless link about requiring simultaneously, thereby guarantees the reliable sealing requirement.Yet, under some particular case, owing to receive the restriction of assembly space constraint and loss of weight requirement; Can't design large-scale thick and heavy sealing configuration, require the flange design of sealing configuration must be in light weight, thin thickness, assembling be flexible, this kind sealing configuration can produce distortion in assembly process; And in the high temperature using process, also can produce distortion; These distortion all cause flange facing increases of cracking, therefore, and the conventional seals structural design of use rubber seal; Can't satisfy the sealing usage requirement, need carry out and satisfy sealing is used about rubber seal lightweight, assembling flexibly and the sealing configuration research that produces distortion in the using process.On the other hand, the General Purpose Rubber material influences the normal use of exquisite systems such as valve contacting the back with strong corrosive medium at elevated-temperature seal using process meeting generation fifth wheel.
Summary of the invention
The purpose of the utility model provides a kind of axial double sealing structure of thin-walled flange tongue-and-groove that is used for the complex working condition condition, and it produces flange distortion and rubber seal and contacts the back with strong corrosive media and after its limit high temperature lower seal uses, do not produce fifth wheel in the wide temperature territory using process of low temperature to its limit high temperature.Wherein said flange distortion comes from the distortion that produces in distortion that normal temperature assembling produces and the elevated-temperature seal using process, and the distortion that the normal temperature assembling produces makes up and down the flanged surface outside maximum of cracking reach 0.2mm; The distortion that produces in the elevated-temperature seal using process makes the flange inside maximum of cracking reach 2.8mm, and the sealing surface of placing the rubber seal place maximum of cracking reaches 1.8mm.
The described a kind of axial double sealing structure of thin-walled flange tongue-and-groove that is used under the complex working condition condition of the utility model; Wherein upper flange and lower flange dock, and pass being fastenedly connected of upper flange and the lower flange last lower flange of realization through several parts that apply the flange pretightening force of circumferential setting; On the lower flange end face that contacts with upper flange, offer the twice annular groove; One annular groove in the outside is the seal groove of assembling rubber seal, and one inboard annular groove is the tongue-and-groove of assembling pad; On the upper flange end face of the tongue-and-groove position of correspondence assembling pad, extend a boss, this boss embeds in the tongue-and-groove of assembling pad, the deep equality of the height value of boss and the tongue-and-groove of assembling pad and greater than the flange inside value of cracking; In the seal groove of assembling rubber seal, place rubber seal, the decrement of this rubber seal is 25～40%; In the tongue-and-groove of assembling pad, place the pad match with its shape, cracking smaller or equal to 0.2mm the height of this pad applies behind the parts of flange pretightening force between the upper flange and lower flange end face with assembling outside is benchmark; The tenon in the described tongue-and-groove that is opened in the assembling pad on the lower flange end face and the matching gap of groove sidewall are 0.05～0.6mm.
The described another kind of the utility model is used for the axial double sealing structure of thin-walled flange tongue-and-groove under the complex working condition condition; Wherein lower flange docks with upper flange; The external diameter of lower flange is less than the external diameter of upper flange; Block lower flange through the kink ring again, several parts that apply the flange pretightening force through circumferential setting pass being fastenedly connected of kink ring and the last lower flange of upper flange realization simultaneously, and it offers the twice annular groove on the lower flange end face that contacts with upper flange; One annular groove in the outside is the seal groove of assembling rubber seal, and one inboard annular groove is the tongue-and-groove of assembling pad; On the upper flange end face of the tongue-and-groove position of correspondence assembling pad, extend a boss, this boss embeds in the tongue-and-groove of assembling pad, the deep equality of the height value of boss and the tongue-and-groove of assembling pad and greater than the flange inside value of cracking; In the seal groove of assembling rubber seal, place rubber seal, the decrement of this rubber seal is 25～40%; In the tongue-and-groove of assembling pad, place the pad match with its shape, cracking smaller or equal to 0.2mm the height of this pad applies behind the parts of flange pretightening force between the upper flange and lower flange end face with assembling outside is benchmark; The tenon in the described tongue-and-groove that is opened in the assembling pad on the lower flange end face and the matching gap of groove sidewall are 0.05～0.6mm.
Aforesaid a kind of axial double sealing structure of thin-walled flange tongue-and-groove that is used under the complex working condition condition; One or more triangular grooves are offered in its described tongue-and-groove bottom that is opened in the assembling pad on the lower flange end face, and it is protruding that the one or more triangles that match are offered on upper flange end face the extended boss bottom corresponding with it.
Aforesaid a kind of axial double sealing structure of thin-walled flange tongue-and-groove that is used under the complex working condition condition, its said interior gasket material of tongue-and-groove that is placed on the assembling pad is selected teflon or soft aluminium material for use; The internal diameter of the internal diameter of said pad and outside dimension and tongue-and-groove and outside dimension reach to fit tightly and are as the criterion.
Aforesaid a kind of axial double sealing structure of thin-walled flange tongue-and-groove that is used under the complex working condition condition, its described interior rubber seal material selection fluorine rubber or fluoroether rubber or ethylene propylene rubber of seal groove that is placed on the assembling rubber seal.
Aforesaid a kind of axial double sealing structure of thin-walled flange tongue-and-groove that is used under the complex working condition condition, its described upper flange and lower flange are selected steel or aluminium material for use; The end surface thickness of described upper flange or lower flange is at 8mm～10mm; The described parts that apply the flange pretightening force are screw bolt and nut.
The effect of the utility model is:
The described axial double sealing structure of flange tongue-and-groove that is used under the complex working condition condition of the utility model; It adopts flange double sealing structural type; Inner seal adopts tongue-and-groove and pad; Rubber seal is adopted in outer side sealing; Solved the sealing problem of strong corrosive medium environment lower seal structure under texturizing condition, said distortion comes from the distortion that produces in distortion that normal temperature assembling produces and the elevated-temperature seal using process, and wherein the distortion that produces of normal temperature assembling makes up and down the flanged surface outside maximum of cracking reach 0.2mm; The distortion that produces in the elevated-temperature seal using process makes the flange inside maximum of cracking reach 2.8mm, and the sealing surface of placing the rubber seal place maximum of cracking reaches 1.8mm.
The utility model has carried out above-mentioned sealing configuration flange in the wide temperature territory using process of-60 ℃～rubber seal limit high temperature respectively and has produced under the texturizing condition and rubber seal contact the back and simulates certification test in the sealing of its limit high temperature use with strong corrosive media; Test result shows that sealing configuration does not leak, and does not produce fifth wheel.Wherein, about the distortion of normal temperature assembling generation makes crack and reach 0.2mm in the flanged surface outside; The distortion that produces in the elevated-temperature seal using process makes flange inside crack to reach 2.8mm that the sealing surface of placing the rubber seal place cracks and reaches 1.8mm.
Description of drawings
Fig. 1 is embodiment's 1 described a kind of axial double sealing structural representation of thin-walled flange tongue-and-groove that is used for the complex working condition condition;
Fig. 2 is embodiment's 3 described a kind of axial double sealing structural representations of thin-walled flange tongue-and-groove that are used for the complex working condition condition;
Fig. 3 is that tongue-and-groove cooperates schematic representation with upper flange.
Among the figure: the 1-upper flange; The 2-lower flange; The tongue-and-groove of 3-assembling pad; The seal groove of 4-assembling rubber seal; 5-applies the parts of flange pretightening force; 6-kink ring.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the described axial double sealing structure of thin-walled flange tongue-and-groove that is used for the complex working condition condition of the utility model is further described.
Embodiment 1
As shown in Figure 1; This is used for the axial double sealing structure of flange tongue-and-groove under the complex working condition condition; Its upper flange 1 and lower flange 2 butt joints, and several parts 5 (employing screw bolt and nut) that apply the flange pretightening force through circumferential setting pass upper flange 1 and realize going up being fastenedly connected of lower flange with lower flange 2 outers.The material of upper flange is 5A06, and the upper flange end surface thickness is 8mm; The material of lower flange is 1Cr18Ni9Ti, and the lower flange end surface thickness is 8mm.
On lower flange 2 end faces that contact with upper flange 1, offer the twice annular groove.
Superolateral one annular groove of lower flange 2 end faces is the seal groove 4 of assembling rubber seal.The width of seal groove 4 is 4mm, and the degree of depth is 2.25mm.In the seal groove 4 of assembling rubber seal, place rubber seal, this rubber seal is the fluoroether rubber O-ring seals of Φ 3, and the decrement of this rubber seal is 25%.
As shown in Figure 3, one inboard on lower flange 2 end faces annular groove is for assembling the tongue-and-groove 3 of pad.On upper flange 1 end face of tongue-and-groove 3 positions of correspondence assembling pad, extend a boss, boss embeds in the tongue-and-groove 3 of assembling pad.The nominal altitude value H1 of this boss equates with the nominal depth value H2 of the tongue-and-groove 3 of assembling pad; Be H1=H2=4mm, tolerance wherein is
The equilateral triangle convexity that it is 0.45mm that the tongue-and-groove 3 bottoms equilateral triangle groove that to offer a length of side be 0.45mm of assembling pad, on upper flange 1 end face the extended boss bottom corresponding with it are offered the length of side matching.The matching gap of tenon in the tongue-and-groove 3 and groove sidewall is 0.5mm.
In the tongue-and-groove 3 of assembling pad, place the teflon gasket match with its shape, the height of pad is that internal diameter and the outside dimension of
this pad is as the criterion to reach to fit tightly with the internal diameter of tongue-and-groove 3 and outside dimension.
This assembly process that is used for the axial double sealing structure of flange tongue-and-groove under the complex working condition condition is following: teflon gasket is installed on tongue-and-groove 3; The fluoroether rubber O-ring seals is installed in the seal groove 4; Adopt torque spanner then, each bolt of the parts that apply the flange pretightening force 5 (employing screw bolt and nut) is tightened symmetrically, divide 4～5 times the Bolt Tightening Force square to be added to 20N.m; Then, along the circumferential direction calibrate moment twice.Adopt feeler gauge, recording maximal clearance, the lower flange outside is 0.2mm.
To the axial double sealing structure of the flange tongue-and-groove of above-mentioned assembling; Carried out-60 ℃ of leakage tests respectively, the leakage test under (contact pressure the is 0.4MPa) condition that contacts 150 hours at 40 ℃ with the dinitrogen tetroxide gas phase media, with normal temperature after the dinitrogen tetroxide gas phase media contacts, low temperature-20 ℃ and high temperature 355 ℃ of (test period 10 minutes, test pressure 0.9MPa; Flange is applied axial force 15000N, lateral force 4500N, flange moment of flexure 450N.m; Apply oscillating load 25.1g) leakage test, test result shows: in above-mentioned process of the test, all do not leak.After the test frock was cooled to normal temperature, through overhaul, cracked and reach 2.52mm in test flange inside, and the sealing surface of placing the rubber seal place cracks and reaches 1.58mm, does not have fifth wheel in the cavity of test frock.
As a comparison; To the single track sealing configuration (other condition is with the above) that does not comprise assembling teflon gasket tongue-and-groove; Carried out corresponding test respectively, test result shows :-60 ℃ of leakage test processes are leaked, normal temperature, low temperature seal process of the test after medium contact process and the medium contact are not leaked, 355 ℃ of leakage test processes of high temperature are leaked.After the test frock was cooled to normal temperature, through overhaul, cracked and reach 2.51mm in test flange inside, and the sealing surface of placing the rubber seal place cracks and reaches 1.52mm, and the fluoroether rubber Sealing is extruded into test frock cavity inward flange.
Embodiment 2
As shown in Figure 1; This is used for the axial double sealing structure of flange tongue-and-groove under the complex working condition condition; Its upper flange 1 and lower flange 2 butt joints, and several parts 5 (employing screw bolt and nut) that apply the flange pretightening force through circumferential setting pass upper flange 1 and realize going up being fastenedly connected of lower flange with lower flange 2 outers.The material of upper flange is 2A14, and the upper flange end surface thickness is 8mm; The material of lower flange is 1Cr18Ni9Ti, and the lower flange end surface thickness is 8mm.
On lower flange 2 end faces that contact with upper flange 1, offer the twice annular groove.
Superolateral one annular groove of lower flange 2 end faces is the seal groove 4 of assembling rubber seal.The width of seal groove 4 is 4mm, and the degree of depth is 1.8mm.In the seal groove 4 of assembling rubber seal, place the rubber seal that matches with its shape, this rubber seal is the fluororubber O shape Sealing of Φ 3,, the decrement of this rubber seal is 40%.
One inboard on lower flange 2 end faces annular groove is for assembling the tongue-and-groove 3 of pad.On upper flange 1 end face of tongue-and-groove 3 positions of correspondence assembling pad, extend a boss, boss embeds in the tongue-and-groove 3 of assembling pad.The nominal altitude value H1 of this boss equates with the nominal depth value H2 of the tongue-and-groove 3 of assembling pad; Be H1=H2=2.8mm, tolerance wherein is
To offer the downward length of side in summit be the equilateral triangle groove of 0.45mm in tongue-and-groove 3 bottoms of assembling pad, the equilateral triangle convexity that it is 0.45mm that the length of side matching is offered on upper flange 1 end face the extended boss bottom corresponding with it.The matching gap of tenon in the tongue-and-groove 3 and groove sidewall is 0.6mm.
In the tongue-and-groove 3 of assembling pad, place the soft aluminium backing match with its shape, the height of pad is that internal diameter and the outside dimension of
this pad is as the criterion to reach to fit tightly with the internal diameter of tongue-and-groove 3 and outside dimension.
This assembly process that is used for the axial double sealing structure of flange tongue-and-groove under the complex working condition condition is following: soft aluminium backing is installed on tongue-and-groove 3; Fluororubber O shape Sealing is installed in the seal groove 4; Adopt torque spanner then, each bolt of the parts that apply the flange pretightening force 5 (employing screw bolt and nut) is tightened symmetrically, divide 4～5 times the Bolt Tightening Force square to be added to 20N.m; Then, along the circumferential direction calibrate moment twice.Adopt feeler gauge, recording maximal clearance, the lower flange outside is 0.2mm.
Sealing configuration to above-mentioned assembling; Carried out-60 ℃ of leakage tests respectively, the leakage test under (contact pressure the is 0.5MPa) condition that contacts 150 hours at 40 ℃ with the uns-dimethylhydrazine gas phase media, with normal temperature after the uns-dimethylhydrazine gas phase media contacts, low temperature-20 ℃ and high temperature 345 ℃ of (test period 12 minutes, test pressure 0.95MPa; Flange is applied axial force 14500N, lateral force 5500N, flange moment of flexure 550N.m; Apply oscillating load 24.8g) leakage test, test result shows: in above-mentioned process of the test, all do not leak.After the test frock was cooled to normal temperature, through overhaul, cracked and reach 2.42mm in test flange inside, and the sealing surface of placing the rubber seal place cracks and reaches 1.45mm, does not have fifth wheel in the cavity of test frock.
As a comparison; To the single track sealing configuration (other condition is with the above) that does not comprise assembling teflon gasket tongue-and-groove; Carried out corresponding leakage test respectively, test result shows :-60 ℃ of leakage test processes are leaked, normal temperature, low temperature seal process of the test after medium contact process and the medium contact are not leaked, 345 ℃ of leakage test processes of high temperature are leaked.After the test frock was cooled to normal temperature, through overhaul, cracked and reach 2.4mm in test flange inside, and the sealing surface of placing the rubber seal place cracks and reaches 1.45mm, in the test frock cavity black paint shape thing is arranged.
In addition as a comparison; Fluorine rubber seal element in the above-mentioned single track sealing configuration is replaced with hollow metal O shape ring; The width of seal groove is designed to 4.2mm; Groove depth is designed to 1.8mm, and placing cross-section size in this groove is the hollow metal O-ring packing of Φ 3, and other condition is with the above; Carried out corresponding leakage test respectively, test result shows: normal temperature, the low temperature seal process of the test after-60 ℃ of leakage tests, medium contact process and media contact do not leaked, 345 ℃ of leakage test processes of high temperature are leaked.After the test frock was cooled to normal temperature, through overhaul, cracked and reach 2.39mm in test flange inside, and the sealing surface of placing the Sealing place cracks and reaches 1.42mm, no fifth wheel in the test frock cavity.
As shown in Figure 2; This is used for the axial double sealing structure of flange tongue-and-groove under the complex working condition condition; Its upper flange 1 and lower flange 2 butt joints; Block lower flange 2 through kink ring 6 again, several parts 5 (employing screw bolt and nut) that apply the flange pretightening force through circumferential setting pass being fastenedly connected of kink ring 6 and the upper flange 1 last lower flange of realization simultaneously.The material of upper flange is 5A06, and the upper flange end surface thickness is 8mm; The material of lower flange is 1Cr18Ni9Ti, and the lower flange end surface thickness is 8mm.
On lower flange 2 end faces that contact with upper flange 1, offer the twice annular groove.
Superolateral one annular groove of lower flange 2 end faces is the seal groove 4 of assembling rubber seal.The width of seal groove 4 is 4mm, and the degree of depth is 2.25mm.In the seal groove 4 of assembling rubber seal, place rubber seal, this rubber seal is the fluoroether rubber O-ring seals of Φ 3, and the decrement of this rubber seal is 25%.
As shown in Figure 3, one inboard on lower flange 2 end faces annular groove is for assembling the tongue-and-groove 3 of pad.On upper flange 1 end face of tongue-and-groove 3 positions of correspondence assembling pad, extend a boss, boss embeds in the tongue-and-groove 3 of assembling pad.The nominal altitude value H1 of this boss equates with the nominal depth value H2 of the tongue-and-groove 3 of assembling pad; Be H1=H2=4mm, tolerance wherein is for being
The equilateral triangle convexity that it is 0.45mm that the tongue-and-groove 3 bottoms equilateral triangle groove that to offer a length of side be 0.45mm of assembling pad, on upper flange 1 end face the extended boss bottom corresponding with it are offered the length of side matching.The matching gap of tenon in the tongue-and-groove 3 and groove sidewall is 0.5mm.
In the tongue-and-groove 3 of assembling pad, place the teflon gasket match with its shape, the height of pad is that internal diameter and the outside dimension of
this pad is as the criterion to reach to fit tightly with the internal diameter of tongue-and-groove 3 and outside dimension.
This assembly process that is used for the axial double sealing structure of flange tongue-and-groove under the complex working condition condition is following: teflon gasket is installed on tongue-and-groove 3; The fluoroether rubber O-ring seals is installed in the seal groove 4, places kink ring 6 at lower flange 2 places, adopt torque spanner then; Each bolt is tightened symmetrically; Divide 4～5 times the Bolt Tightening Force square to be added to 20N.m, then, along the circumferential direction calibrate moment twice.Adopt feeler gauge, recording maximal clearance, the lower flange outside is 0.2mm.
To the axial double sealing structure of the flange tongue-and-groove of above-mentioned assembling; Carried out-60 ℃ of leakage tests respectively, the leakage test under (contact pressure the is 0.4MPa) condition that contacts 150 hours at 40 ℃ with the dinitrogen tetroxide gas phase media, with normal temperature after the dinitrogen tetroxide gas phase media contacts, low temperature-20 ℃ and high temperature 355 ℃ of (test period 10 minutes, test pressure 0.9MPa; Flange is applied axial force 15000N, lateral force 4500N, flange moment of flexure 450N.m; Apply oscillating load 25.1g) leakage test, test result shows: in above-mentioned process of the test, all do not leak.After the test frock was cooled to normal temperature, through overhaul, cracked and reach 2.81mm in test flange inside, and the sealing surface of placing the rubber seal place cracks and reaches 1.82mm, does not have fifth wheel in the cavity of test frock.
As a comparison; To the single track sealing configuration (other condition is with the above) that does not comprise assembling teflon gasket tongue-and-groove; Carried out corresponding test respectively, test result shows :-60 ℃ of leakage test processes are leaked, normal temperature, low temperature seal process of the test after medium contact process and the medium contact are not leaked, 355 ℃ of leakage test processes of high temperature are leaked.After the test frock was cooled to normal temperature, through overhaul, cracked and reach 2.81mm in test flange inside, and the sealing surface of placing the rubber seal place cracks and reaches 1.81mm, and the fluoroether rubber Sealing is extruded into test frock cavity inward flange.
Embodiment 4
As shown in Figure 2; This is used for the axial double sealing structure of flange tongue-and-groove under the complex working condition condition; Its upper flange 1 and lower flange 2 butt joints; Block lower flange 2 through kink ring 6 again, several parts 5 (employing screw bolt and nut) that apply the flange pretightening force through circumferential setting pass being fastenedly connected of kink ring 6 and the upper flange 1 last lower flange of realization simultaneously.The material of upper flange is 2A14, and the upper flange end surface thickness is 8mm; The material of lower flange is 1Cr18Ni9Ti, and the lower flange end surface thickness is 8mm.
On lower flange 2 end faces that contact with upper flange 1, offer the twice annular groove.
Superolateral one annular groove of lower flange 2 end faces is the seal groove 4 of assembling rubber seal.The width of seal groove 4 is 4mm, and the degree of depth is 1.8mm.In the seal groove 4 of assembling rubber seal, place rubber seal, this rubber seal is the fluororubber O shape Sealing of Φ 3, and the decrement of this rubber seal is 40%.
As shown in Figure 3, one inboard on lower flange 2 end faces annular groove is for assembling the tongue-and-groove 3 of pad.On upper flange 1 end face of tongue-and-groove 3 positions of correspondence assembling pad, extend a boss, boss embeds in the tongue-and-groove 3 of assembling pad.The nominal altitude value H1 of this boss equates with the nominal depth value H2 of the tongue-and-groove 3 of assembling pad; Be H1=H2=3.5mm, tolerance wherein is for being
The equilateral triangle convexity that it is 0.45mm that the tongue-and-groove 3 bottoms equilateral triangle groove that to offer a length of side be 0.45mm of assembling pad, on upper flange 1 end face the extended boss bottom corresponding with it are offered the length of side matching.The matching gap of tenon in the tongue-and-groove 3 and groove sidewall is 0.6mm.
In the tongue-and-groove 3 of assembling pad, place the teflon gasket match with its shape, the height of pad is that internal diameter and the outside dimension of
this pad is as the criterion to reach to fit tightly with the internal diameter of tongue-and-groove 3 and outside dimension.
This assembly process that is used for the axial double sealing structure of flange tongue-and-groove under the complex working condition condition is following: teflon gasket is installed on tongue-and-groove 3; Fluororubber O shape Sealing is installed in the seal groove 4, places kink ring 6 at lower flange 2 places, adopt torque spanner then; Each bolt is tightened symmetrically; Divide 4～5 times the Bolt Tightening Force square to be added to 20N.m, then, along the circumferential direction calibrate moment twice.Adopt feeler gauge, recording maximal clearance, the lower flange outside is 0.2mm.
To the axial double sealing structure of the flange tongue-and-groove of above-mentioned assembling; Carried out-60 ℃ of leakage tests respectively, the leakage test under (contact pressure the is 0.5MPa) condition that contacts 150 hours at 40 ℃ with the uns-dimethylhydrazine gas phase media, with normal temperature after the uns-dimethylhydrazine gas phase media contacts, low temperature-20 ℃ and high temperature 345 ℃ of (test period 12 minutes, test pressure 0.95MPa; Flange is applied axial force 14500N, lateral force 5500N, flange moment of flexure 550N.m; Apply oscillating load 24.8g) leakage test, test result shows: in above-mentioned process of the test, all do not leak.After the test frock was cooled to normal temperature, through overhaul, cracked and reach 2.75mm in test flange inside, and the sealing surface of placing the rubber seal place cracks and reaches 1.72mm, does not have fifth wheel in the cavity of test frock.
As a comparison; To the single track sealing configuration (other condition is with the above) that does not comprise assembling teflon gasket tongue-and-groove; Carried out corresponding test respectively, test result shows :-60 ℃ of leakage test processes are leaked, normal temperature, low temperature seal process of the test after medium contact process and the medium contact are not leaked, 345 ℃ of leakage test processes of high temperature are leaked.After the test frock was cooled to normal temperature, through overhaul, cracked and reach 2.75mm in test flange inside, and the sealing surface of placing the rubber seal place cracks and reaches 1.71mm, in the test frock cavity black paint shape thing is arranged.
Claims (6)
1. axial double sealing structure of thin-walled flange tongue-and-groove that is used under the complex working condition condition; Wherein upper flange (1) and lower flange (2) butt joint; And several parts (5) that apply the flange pretightening force through circumferential setting pass being fastenedly connected of lower flange in upper flange (1) and lower flange (2) realization, it is characterized in that: on lower flange (2) end face that contacts with upper flange (1), offer the twice annular groove; One annular groove in the outside is the seal groove (4) of assembling rubber seal, and one inboard annular groove is the tongue-and-groove (3) of assembling pad; On upper flange (1) end face of tongue-and-groove (3) position of correspondence assembling pad, extend a boss, this boss embeds in the tongue-and-groove (3) of assembling pad, the deep equality of the height value of boss and the tongue-and-groove (3) of assembling pad and greater than the flange inside value of cracking; In the seal groove (4) of assembling rubber seal, place rubber seal, the decrement of this rubber seal is 25～40%; In the tongue-and-groove (3) of assembling pad, place the pad match with its shape, it is benchmark that the parts (5) that the height of this pad applies the flange pretightening force with assembling crack smaller or equal to 0.2mm outside afterwards between upper flange (1) and lower flange (2) end face; The tenon in the described tongue-and-groove (3) that is opened in the assembling pad on lower flange (2) end face and the matching gap of groove sidewall are 0.05～0.6mm.
2. axial double sealing structure of thin-walled flange tongue-and-groove that is used under the complex working condition condition; Wherein lower flange (2) docks with upper flange (1); The external diameter of lower flange (2) is less than the external diameter of upper flange (1); Block lower flange (2) through kink ring (6) again, several parts (5) that apply the flange pretightening force through circumferential setting pass being fastenedly connected of lower flange in kink ring (6) and upper flange (1) realization simultaneously, it is characterized in that: on lower flange (2) end face that contacts with upper flange (1), offer the twice annular groove; One annular groove in the outside is the seal groove (4) of assembling rubber seal, and one inboard annular groove is the tongue-and-groove (3) of assembling pad; On upper flange (1) end face of tongue-and-groove (3) position of correspondence assembling pad, extend a boss, this boss embeds in the tongue-and-groove (3) of assembling pad, the deep equality of the height value of boss and the tongue-and-groove (3) of assembling pad and greater than the flange inside value of cracking; In the seal groove (4) of assembling rubber seal, place rubber seal, the decrement of this rubber seal is 25～40%; In the tongue-and-groove (3) of assembling pad, place the pad match with its shape, it is benchmark that the parts (5) that the height of this pad applies the flange pretightening force with assembling crack smaller or equal to 0.2mm outside afterwards between upper flange (1) and lower flange (2) end face; The tenon in the described tongue-and-groove (3) that is opened in the assembling pad on lower flange (2) end face and the matching gap of groove sidewall are 0.05～0.6mm.
3. a kind of axial double sealing structure of thin-walled flange tongue-and-groove that is used under the complex working condition condition according to claim 1 and 2; It is characterized in that: one or more triangular grooves are offered in described tongue-and-groove (3) bottom that is opened in the assembling pad on lower flange (2) end face, and it is protruding that the one or more triangles that match are offered on upper flange (1) end face the extended boss bottom corresponding with it.
4. a kind of axial double sealing structure of thin-walled flange tongue-and-groove that is used under the complex working condition condition according to claim 1 and 2 is characterized in that: the said interior gasket material of tongue-and-groove (3) that is placed on the assembling pad is selected teflon or soft aluminium material for use; The internal diameter of the internal diameter of said pad and outside dimension and tongue-and-groove (3) and outside dimension reach to fit tightly and are as the criterion.
5. a kind of axial double sealing structure of thin-walled flange tongue-and-groove that is used under the complex working condition condition according to claim 1 and 2 is characterized in that: described interior rubber seal material selection fluorine rubber or fluoroether rubber or the ethylene propylene rubber of seal groove (4) that is placed on the assembling rubber seal.
6. a kind of axial double sealing structure of thin-walled flange tongue-and-groove that is used under the complex working condition condition according to claim 1 and 2, it is characterized in that: described upper flange (1) and lower flange (2) are selected steel or aluminium material for use; The end surface thickness of described upper flange (1) or lower flange (2) is at 8mm～10mm; The described parts (5) that apply the flange pretightening force are screw bolt and nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120358124 CN202301936U (en) | 2011-09-22 | 2011-09-22 | Axial double-way sealing structure of thin-wall flange chase mortise used in complicated working conditions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120358124 CN202301936U (en) | 2011-09-22 | 2011-09-22 | Axial double-way sealing structure of thin-wall flange chase mortise used in complicated working conditions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202301936U true CN202301936U (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120358124 Expired - Lifetime CN202301936U (en) | 2011-09-22 | 2011-09-22 | Axial double-way sealing structure of thin-wall flange chase mortise used in complicated working conditions |
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| Country | Link |
|---|---|
| CN (1) | CN202301936U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102367871A (en) * | 2011-09-22 | 2012-03-07 | 航天材料及工艺研究所 | Thin-wall flange tongue-and-groove dual-way seal structure of for complex working conditions and applications thereof |
| CN115750953A (en) * | 2022-11-11 | 2023-03-07 | 中国空气动力研究与发展中心超高速空气动力研究所 | High-temperature ultrahigh-pressure plane sealing structure and application method thereof |
-
2011
- 2011-09-22 CN CN 201120358124 patent/CN202301936U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102367871A (en) * | 2011-09-22 | 2012-03-07 | 航天材料及工艺研究所 | Thin-wall flange tongue-and-groove dual-way seal structure of for complex working conditions and applications thereof |
| CN102367871B (en) * | 2011-09-22 | 2016-01-27 | 航天材料及工艺研究所 | For thin-wall flange mortise double-channel sealing structure and the application of complex working conditions |
| CN115750953A (en) * | 2022-11-11 | 2023-03-07 | 中国空气动力研究与发展中心超高速空气动力研究所 | High-temperature ultrahigh-pressure plane sealing structure and application method thereof |
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Granted publication date: 20120704 |