CN205298561U - A aerify axial seal device for under vacuum environment - Google Patents
A aerify axial seal device for under vacuum environment Download PDFInfo
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- CN205298561U CN205298561U CN201521034587.4U CN201521034587U CN205298561U CN 205298561 U CN205298561 U CN 205298561U CN 201521034587 U CN201521034587 U CN 201521034587U CN 205298561 U CN205298561 U CN 205298561U
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Abstract
The utility model belongs to the hypersonic wind tunnel field relates to an aerify axial seal device for under vacuum environment and includes inflatable seal circle, sealed barrel, switching sleeve, gas ducting and air compressor, and wherein inflatable seal circle, sealed barrel and switching sleeve are axial symmetrical structure, the inflatable seal circle is installed in the recess of switching sleeve, the inflation interface of inflatable seal circle and the inflation interface cooperation of switching sleeve, sealed barrel can fully touch the surface that seals up the barrel after messenger's sealing washer is inflated in getting into the switching sleeve, the inflation inlet of air compressor and inflatable seal circle is connected to the gas ducting. The utility model discloses aerify the axial seal device and solved the not enough of bellows joint mode, reduced investment and running cost, reduced intensity of labour and pipe -line equipment and changed the degree of difficulty, improved pipe -line equipment and changed efficiency, obtain good vibration isolation effect, can be applied to axial vacuum seal between the pipe -line equipment of different bores.
Description
Technical field
This utility model belongs to hypersonic wind tunnel field, relates to a kind of for the inflation axial sealer under vacuum environment.
Background technology
At present, conventional hypersonic wind tunnel equipment runs range of Mach numbers wider (if 1 meter of hypersonic wind tunnel range of Mach numbers of �� is M3��M10), the wind tunnel noumenon involved when changing of jet pipe by fixing equipment 1, stable section 2, be replaced jet pipe 3, jet pipe 4, corrugated tube 5 and test section 6 drop-over successively that need to change form. One Mach number just corresponding a set of jet pipe, seals and vibration damping for convenience of the frequently replacing of jet pipe, vacuum, mostly adopts corrugated tube to be connected, as shown in Figure 1 between test section with jet pipe.
When adopting corrugated tube connected mode, jet pipe is changed needs step as follows:
1. dismounting is replaced the connecting bolt between jet pipe 3 and stable section 2;
2. the pull bar in compress bellows 5, compression distance is greater than and is replaced between jet pipe 3 and stable section 2 twice of positioning spigot;
3. dismantle and hang away stable section 2;
4. dismounting is replaced the bolt between jet pipe 3 and corrugated tube 5;
5. will be replaced jet pipe 3 slow astern set a distance and be walked by traveling crane;
6. need to change jet pipe 4 by driving a vehicle and be placed on supporting mechanism 7;
7. need to change jet pipe 4 to be bolted with corrugated tube 5;
8. by driving a vehicle, stable section 2 is placed on supporting mechanism 7;
9. connect fixing equipment 1 and stable section 2;
10. make to change jet pipe 4 by the pull bar on stretching corrugated tube 5 to retreat;
Jet pipe 4 and stable section 2 need to be changed 11. connect;
The both sides nut of corrugated tube 5 upper connecting rod 12. come loose, makes corrugated tube 5 be in free state, carries out equipment vacuum inspection, once changed.
Large-scale operational outfit adopts above-mentioned corrugated tube connected mode to have the disadvantage that
One) bellows device cost of investment is high, the frequent compress bellows when carrying out equipment replacement, reduces corrugated tube service life, and the corrugated tube cost height cycle that more transducer set damages is long;
Two) change jet pipe every time and need two people compress bellows simultaneously, for the equipment that height (L) is higher, in addition it is also necessary to setting up platform and carry out compress bellows, waste time and energy, efficiency is low, there is potential safety hazard simultaneously;
Three) the maximum compression distance of corrugated tube is generally less than 50mm, dismantles for main equipment, and the adjustable range of corrugated tube is too small, limited space during dismounting, causes lifting requirements high, it is easy to cause the end face damaged in collision of equipment;
Four) corrugated tube self has certain rigidity, and for the equipment that vibration isolation connection request is high, corrugated tube vibration isolating effect is poor.
In recent years, along with country's weapon Project R&D demand is continuously increased, it is desirable to equipment test efficiency improves further, and jet pipe replacement frequency is continuously increased; Project R&D is to the development that becomes more meticulous simultaneously, more and more higher for equipment operational shock insulation request.
Utility model content
The order of this utility model patent is in that to provide a kind of sealing device, solves the deficiency that corrugated tube connected mode exists, lower in cost, more exchange device is in hgher efficiency, and can provide adjusting and more excellent effectiveness in vibration suppression of wider axial distance.
In order to reach above-mentioned utility model purpose, the technical solution of the utility model is as follows:
A kind of for the inflation axial sealer under vacuum environment, described device includes gas-flow closure circle, sealed cylinder, switching sleeve, aerating pipe and air compressor, and wherein gas-flow closure circle, sealed cylinder and switching sleeve are axially symmetric structure;
Gas-flow closure circle is installed in the groove of switching sleeve, and the inflatable interface of gas-flow closure circle coordinates with the inflatable interface of switching sleeve;
Sealed cylinder enters in switching sleeve, can be adequately exposed to the outer surface of sealed cylinder after making sealing ring inflation;
Aerating pipe connects the inflation inlet of air compressor and gas-flow closure circle.
Further, gas-flow closure circle adopts viscose glue or draw-in groove mode to be installed in the groove of switching sleeve.
Further, switching sleeve needs the one end sealed to be connected by flange with Dewar vessel.
Further, described device also includes Pressure gauge and valve, Pressure gauge and valve and is arranged on aerating pipe.
Further, the internal face of sealed cylinder outer surface and switching sleeve such as is at the straight tube, and roughness precision is less than 1.6 ��m, and switching sleeve internal diameter is more than sealed cylinder external diameter, and gap is 3mm��7mm between the two.
This utility model inflation axial sealer solves the deficiency of corrugated tube connected mode, reduce investment and operating cost, reduce labor intensity and difficulty changed by pipe-line equipment, improve pipe-line equipment and change efficiency, obtain good vibration isolating effect, it is possible to being applied between the pipe-line equipment of different bore axial vacuum seals.
Accompanying drawing explanation
Accompanying drawing 1 is the wind-tunnel sketch adopting corrugated tube connected mode in background technology;
Accompanying drawing 2 inflates the structure diagram of axial sealer for this utility model;
Accompanying drawing 3 is this utility model gas-flow closure circle and switching sleeve junction enlarged drawing;
Accompanying drawing 4 is this utility model switching sleeve and vacuum space junction enlarged drawing;
Accompanying drawing 5 is the sealing surface schematic diagram under this utility model gas-flow closure circle inflated condition;
Accompanying drawing 6 is the wind-tunnel sketch adopting this utility model inflation axial sealer in embodiment.
Detailed description of the invention
A kind of for the inflation axial sealer under vacuum environment, as shown in Figure 2, described device includes gas-flow closure circle 9, sealed cylinder 10, switching sleeve 11, aerating pipe 14 and air compressor 15, and wherein gas-flow closure circle 9, sealed cylinder 10 and switching sleeve 11 are axially symmetric structure;
Gas-flow closure circle 9 is installed in the groove of switching sleeve 11, and the inflatable interface of gas-flow closure circle 9 coordinates with the inflatable interface of switching sleeve 11;
Sealed cylinder 10 enters in switching sleeve 11, can be adequately exposed to the outer surface of sealed cylinder 10 after making sealing ring 9 inflation;
Aerating pipe 14 connects the inflation inlet of air compressor 15 and gas-flow closure circle 9.
Embodiment 1
A kind of for the inflation axial sealer under vacuum environment, as shown in Figure 2, including gas-flow closure circle 9, sealed cylinder 10, switching sleeve 11, Pressure gauge 12, valve 13, aerating pipe 14 and air compressor 15, wherein gas-flow closure circle 9, sealed cylinder 10 and switching sleeve 11 are axially symmetric structure, illustrate by two-dimensional cross section in accompanying drawing;
Gas-flow closure circle 9 is installed in the groove of switching sleeve 11, and ensure sealing ring 9 inflation or inflated condition will not arbitrarily not come off, the mode such as viscose glue, draw-in groove can be adopted to install; The inflatable interface of the inflatable interface of gas-flow closure circle 9 Yu switching sleeve 11 is worked good; Gas-flow closure circle 9 is in not inflated condition in whole installation process, sees accompanying drawing 3;
Switching sleeve 11 is arranged on one end (entrance or the port of export) that Dewar vessel 16 needs to seal, and is generally adopted Flange joint, sees accompanying drawing 4;
Sealed cylinder 10 is connected as a whole with pipe-line equipment 8 (dotted portion), it is ensured that be in sealing state between the two, and the mode being generally adopted welding ensures to seal, and sees accompanying drawing 4;
Sealed cylinder 10 on pipe-line equipment 8 enters in switching sleeve 11, can be adequately exposed to the outer surface of sealed cylinder 10, see accompanying drawing 3 after making sealing ring 9 inflation;
Aerating pipe 14 connects the inflation inlet of air compressor 15 and gas-flow closure circle 9, installs Pressure gauge 12 and valve 13 on aerating pipe 14, it is simple to detection and control gas replenishment process, sees accompanying drawing 2.
The sealed cylinder 10 of pipe-line equipment 8 and switching sleeve 11 need to carry out polish, and sealed cylinder 10 outer surface such as is at the straight tube, and roughness precision is less than 1.6 ��m; The straight tubes such as the internal face of switching sleeve 11 is also, roughness essence to be also less than 1.6 ��m; Sealed cylinder 10 external diameter need to be determined according to the size of pipe-line equipment 8, the external diameter of sealed cylinder 10 need to slightly larger than or equal to pipe-line equipment 8 external diameter (equal to time be exactly the outer surface of pipe-line equipment 8 is machined directly to roughness less than 1.6 ��m etc. straight tube); Need to be welded on pipe-line equipment 8 after sealed cylinder 10 completion of processing, or directly the outer surface of pipe-line equipment 8 be processed to form roughness less than 1.6 ��m etc. straight tube.
Switching sleeve 11 internal diameter is more than sealed cylinder 10 external diameter, and gap is 3mm��7mm between the two, and namely the internal diameter of switching sleeve 11 is that the external diameter of sealed cylinder 10 adds 6mm��14mm, and formula is Dz=Dm+ 6��Dm+ 14, wherein DzFor switching sleeve 11 internal diameter (mm), DmExternal diameter (mm) for sealed cylinder 10.
Switching sleeve 11 needs to process the seal groove similar with sealing ring 9 cross sectional shape in inside, is used for installing sealing ring 9, and leaves gas-flow closure circle inflatable interface, sees accompanying drawing 3.
Gas-flow closure circle 9 specification selects according to sealed cylinder 10 diameter, it is ensured that slightly larger than the external diameter of sealed cylinder 10 when sealing ring 9 is not inflated, but after inflation, sealing ring 9 can be expressed to sealed cylinder 10. Gas-flow closure circle 9 material selection silicone rubber or fluorubber, the cross sectional shape of gas-flow closure circle 9 can select rectangle, circle, trapezoidal or other shape, can be customized by specialized factory after specification is selected.
Shown in the sealing principle of above-mentioned inflation axial sealer such as accompanying drawing 3 and accompanying drawing 5. Inflation axial sealer connect after, if gas-flow closure circle 9 be in not inflated condition time, such as accompanying drawing 3, this timer is in non-tight state, and pipe-line equipment 8 can be free to move axially and adjust;After pipe-line equipment 8 is installed to precalculated position, being started by air compressor 15 and set a steady pressure value (need to more than 101kPa, suggestion is at about 300kPa), open valve 13 to be inflated to gas-flow closure circle 9 by aerating pipe 14, gas-flow closure circle 9 inner chamber expands and increases, outer surface is expressed to the sealed cylinder 10 on switching sleeve 11 internal face and pipe-line equipment 8 respectively, see accompanying drawing 5, such switching sleeve 11 internal faces-gas-flow closure circle 9 outer surfaces-sealed cylinder 10 outside wall surface forms sealing surface, realize the negative-pressure sealing of vacuum space 16 (being test section 6 in wind-tunnel facilities) and pipe-line equipment 8 junction, simultaneously air compressor 15 detect the pressure oscillation in sealing ring 9 automatically, and is automatically performed QI invigorating, and maintenance the blowing pressure is constant and sealing state.
When vacuum space 16 and pipe-line equipment 8 junction are made without sealing or needing dismounting pipe-line equipment 8, close air compressor 15, by valve 13 and aerating pipe 14, the air in sealing ring 9 is discharged, gas-flow closure circle 9 automatic rebounding is in the seal groove of switching sleeve 11, this device is in blow-by state (such as accompanying drawing 3), pipe-line equipment 8 can be free to move axially, it is simple to carries out the adjustment of pipe-line equipment 8 axial location, dismounting and replacing.
This utility model inflation axial sealer applying working condition is: seal pressure 10Pa��100000Pa; Use temperature less than 250 DEG C; Sealing ring the blowing pressure 0.1MPa��0.5MPa; Seal radial clearance 3mm��7mm; Seal suitable in vacuum between the pipe-line equipment of various different bores.
Embodiment 2
This utility model inflation axial sealer finds application with 1 meter of hypersonic wind tunnel of centre of development �� at China's aerodynamic investigation, for the sealing between jet pipe and test section. Jet pipe external diameter is about �� 1.1m, and is curved surface, therefore machined the straight sealed cylinder such as grade that external diameter is �� about 1.2m and is welded to jet pipe outside wall surface, and switching sleeve internal diameter is �� about 1.2m.
As shown in accompanying drawing 6 (each parts that in figure, inflation axial sealer 17 is inflated axial sealer by accompanying drawing 2 are formed by connecting), the operating procedure using this inflation 1 meter of hypersonic wind tunnel different Mach number jet pipe of axial sealer �� is as follows:
1. the gas-flow closure circle 9 of inflation axial sealer 17 is exitted, in the groove of gas-flow closure circle 9 retraction switching sleeve 11 automatically, be replaced between jet pipe 3 and test section 6 and be in blow-by state;
2. dismantle stable section 2 and the connecting bolt being replaced between jet pipe 3, replacing jet pipe 3 is moved a certain distance toward test section 6 direction;
3. dismantle and hang away stable section 2;
4. will be replaced jet pipe 3 to fixing equipment 1 direction slow astern set a distance and to be walked by traveling crane;
5. need to change jet pipe 4 be placed on supporting mechanism 7 by driving a vehicle, jet pipe 4 need to be changed and enter fixing equipment 6 certain distance so that the installation of stable section 2;
6. by driving a vehicle, stable section 2 is placed on supporting mechanism 7;
7. connect fixing equipment 1 and stable section 2;
7. need to change jet pipe 4 retreat and be connected with stable section 2;
8. open air compressor 15 and sealing ring 9 is inflated by valve 13, carry out equipment vacuum inspection, once changed.
1 meter of hypersonic wind tunnel of �� adopt the improvement that inflation axial sealer obtains after replacing corrugated tube (internal diameter �� 1.2m) connected mode as shown in table 1.
Internal diameter �� 1.2m corrugated tube processing cost is about 60,000 yuan, and the process-cycle needs for 3��May, if occurring damaging, need to again process;The inflation axial seal processing cost that bore is identical is about 1.5 ten thousand yuan, only need to get final product completion of processing in about 1 month, in using, general only gas-flow closure circle is likely to occur damage, replacement cost only needs about 5,000 yuan, so comparing corrugated tube, inflation axial sealer all declines to a great extent in processing and use cost.
The general internal diameter �� axially adjustable distance of 1.2m corrugated tube is �� 50mm, and corrugated tube self has certain rigidity, wind-tunnel starts or can produce shock loading in closing process, all load absorption cannot be fallen by corrugated tube self, at this moment some power being applied on jet pipe and test section by corrugated tube, vibration isolating effect is poor; And for inflation axial sealer, as long as jet pipe external diameter is less than switching sleeve internal diameter, jet pipe move axially the restriction that will not be subject to sealing device, and it is not rigidly connected between jet pipe and test section, not havinging the transmission of power when being subject to shock loading between jet pipe and test section, vibration isolating effect is good. Therefore adopt inflation axial sealer, increase the scope that jet pipe axially regulates, facilitate axially adjustable, the dismounting of jet pipe and change, and vibration isolating effect is more excellent.
Adopt corrugated tube connected mode, when changing different Mach number jet pipe, it is necessary to 4 personal work a whole day just can complete once to change every time; And after adopting inflation axial sealer, only need 2 personal work within 2��3 hours, can complete once to change, reduce labor intensity and difficulty changed by jet pipe, improve jet pipe and change efficiency.
The beneficial effect of this utility model inflation axial sealer:
This utility model is for the inflation axial sealer under vacuum environment, by gas-flow closure circle, sealed cylinder, switching sleeve, Pressure gauge, valve, aerating pipe, air compressor forms, the processing cost of whole device and operating cost are below the bellows device of identical bore, and the process-cycle is also shorter than corrugated tube process time. This inflation axial sealer is not intended to moving axially between pipe-line equipment and vacuum space substantially, facilitates axially adjustable, the dismounting of pipe-line equipment and changes; Simultaneously because pipe-line equipment and vacuum space are not rigidly connected, vibration isolating effect is good, and these are better than corrugated tube connected mode. When adopting this inflation axial sealer to change pipe-line equipment, only need to being discharged by the gas in gas-flow closure circle, pipe-line equipment can realize axially-movable, simple and fast; And for corrugated tube connected mode, first want compress bellows its length, then the bolt between corrugated tube and pipe-line equipment is removed, moving axially of pipe-line equipment could be realized, bigger for the difficulty of this process main equipment, it is necessary to expend bigger manpower and longer time, and corrugated tube compression surplus is little, the axial range of accommodation of pipe-line equipment is also less, and simultaneously corrugated tube exists certain damage in compression process, decreases corrugated tube service life.
In sum, this utility model inflation axial sealer solves the deficiency of corrugated tube connected mode, reduce investment and operating cost, reduce labor intensity and difficulty changed by pipe-line equipment, improve pipe-line equipment and change efficiency, obtain good vibration isolating effect, it is possible to being applied between the pipe-line equipment of different bore axial vacuum seals.
Claims (5)
1. the inflation axial sealer being used under vacuum environment, it is characterized in that, described device includes gas-flow closure circle (9), sealed cylinder (10), switching sleeve (11), aerating pipe (14) and air compressor (15), and wherein gas-flow closure circle (9), sealed cylinder (10) and switching sleeve (11) are axially symmetric structure;
Gas-flow closure circle (9) is installed in the groove of switching sleeve (11), and the inflatable interface of gas-flow closure circle (9) coordinates with the inflatable interface of switching sleeve (11);
Sealed cylinder (10) enters in switching sleeve (11), can be adequately exposed to the outer surface of sealed cylinder (10) after making sealing ring (9) inflation;
Aerating pipe (14) connects the inflation inlet of air compressor (15) and gas-flow closure circle (9).
2. a kind of for the inflation axial sealer under vacuum environment according to claim 1, it is characterised in that gas-flow closure circle (9) adopts viscose glue or draw-in groove mode to be installed in the groove of switching sleeve (11).
3. a kind of for the inflation axial sealer under vacuum environment according to claim 1, it is characterised in that switching sleeve (11) needs the one end sealed to be connected by flange with Dewar vessel (16).
4. a kind of for the inflation axial sealer under vacuum environment according to claim 1, it is characterized in that, described device also includes Pressure gauge (12) and valve (13), Pressure gauge (12) and valve (13) and is arranged on aerating pipe (14).
5. a kind of for the inflation axial sealer under vacuum environment according to claim 1, it is characterized in that, the straight tubes such as the internal face of sealed cylinder (10) outer surface and switching sleeve (11) is, roughness precision is less than 1.6 ��m, switching sleeve (11) internal diameter is more than sealed cylinder (10) external diameter, and gap is 3mm��7mm between the two.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521034587.4U CN205298561U (en) | 2015-12-09 | 2015-12-09 | A aerify axial seal device for under vacuum environment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521034587.4U CN205298561U (en) | 2015-12-09 | 2015-12-09 | A aerify axial seal device for under vacuum environment |
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| CN205298561U true CN205298561U (en) | 2016-06-08 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105697790A (en) * | 2015-12-09 | 2016-06-22 | 中国空气动力研究与发展中心超高速空气动力研究所 | Air inflation axial sealing device used in vacuum environment |
| CN109882595A (en) * | 2017-12-06 | 2019-06-14 | 北京机电工程研究所 | For the vacuum chamber movable sealing structure under high vibration frequency |
| CN113153086A (en) * | 2020-01-07 | 2021-07-23 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Inflatable seal gate valve and vacuum pipeline with same |
| CN114001215A (en) * | 2021-12-30 | 2022-02-01 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Vibration isolation sealing device |
-
2015
- 2015-12-09 CN CN201521034587.4U patent/CN205298561U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105697790A (en) * | 2015-12-09 | 2016-06-22 | 中国空气动力研究与发展中心超高速空气动力研究所 | Air inflation axial sealing device used in vacuum environment |
| CN109882595A (en) * | 2017-12-06 | 2019-06-14 | 北京机电工程研究所 | For the vacuum chamber movable sealing structure under high vibration frequency |
| CN113153086A (en) * | 2020-01-07 | 2021-07-23 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Inflatable seal gate valve and vacuum pipeline with same |
| CN113153086B (en) * | 2020-01-07 | 2023-01-17 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Inflatable seal gate valve and vacuum pipeline with same |
| CN114001215A (en) * | 2021-12-30 | 2022-02-01 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Vibration isolation sealing device |
| CN114001215B (en) * | 2021-12-30 | 2022-04-08 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Vibration isolation sealing device |
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