CN105889145A - Liquid accumulator with micro-pressure response function - Google Patents
Liquid accumulator with micro-pressure response function Download PDFInfo
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- CN105889145A CN105889145A CN201410753573.1A CN201410753573A CN105889145A CN 105889145 A CN105889145 A CN 105889145A CN 201410753573 A CN201410753573 A CN 201410753573A CN 105889145 A CN105889145 A CN 105889145A
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- assembly
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- inner ring
- rubber diaphragm
- upper shell
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Abstract
The invention provides a liquid accumulator with a micro-pressure response function. The liquid accumulator comprises an upper shell assembly, a lower shell assembly and a sealing assembly, wherein the upper shell assembly comprises a valve core assembly and an upper shell; the lower shell assembly comprises a filtering assembly and a lower shell; the sealing assembly comprises an outer ring, an inner ring and a rubber diaphragm; the rubber diaphragm takes the shape of a frustum and comprises an extending edge; two semicircular sealing bulges are formed on the edge; the edge is fixed between the outer ring and the inner ring in a clamped manner; a double-channel redundant sealing structure is formed by the semicircular sealing bulges; the inner ring and the outer ring are welded in a laser sequence plane welding manner; welding bulges are formed on the periphery of the outer ring; the upper shell, the lower shell and the welding bulges are welded together, so that an air cavity is formed by the sealing assembly and the upper shell assembly, and a liquid cavity is formed by the sealing assembly and the lower shell assembly. The liquid accumulator provided by the invention is applicable to a fluid loop, good in sealing performance, sensitive to stress response and light in weight.
Description
Technical field
The present invention relates to a kind of minute-pressure response reservoir, belong to spacecraft thermal control field, be applied particularly to the Fluid for Single-phase Fluid Loop System of the small-sized spacecrafts such as satellite.
Background technology
The Fluid for Single-phase Fluid Loop System of mechanically-based pump has the advantages such as simple in construction, flexible arrangement, robustness height and inheritability are good, efficiently solves a thermal control difficult problem for spacecraft.Owing to Fluid for Single-phase Fluid Loop System is a closed system, when the temperature is changed, system pressure can drastically change, and in general, system pressure reduction can affect the work of pump, and when pressure increases above equipment pressure, the safety problems such as leakage can occur.Therefore system needs to add reservoir, fluid circuit is suppressed to cause working medium to expand with heat and contract with cold the impact on fluid circuit because of temperature change, compensate loop leakage of working medium in long-play, ensure normal, stable, the reliability service of fluid circuit, for realizing this function, reservoir need to possess the characteristics such as sensitive to pressure oscillation, lightweight, good airproof performance.
In the Large Spacecraft such as space station, space shuttle, Fluid for Single-phase Fluid Loop System technology is widely applied, but it is limited to the problems such as the weight of mechanical pump, domestic the application in the satel-lite of monophasic fluid thermal control loop is still in development, retrieve in certain scope through present invention applicant, do not find to be applicable to Patents and the design data of the small-sized spacecraft reservoirs such as satellite.
Summary of the invention
Present invention solves the technical problem that and be: provide one to be applicable to the small-sized spacecrafts such as satellite, use pressure at below 0.2Mpa and good airproof performance, fluid circuit reservoir sensitive to stress reaction, lightweight.
The minute-pressure response reservoir of the present invention includes upper housing component, lower house assembly and black box；Described upper housing component includes core assembly and upper shell；Described lower house assembly includes filter assemblies and lower house；Described black box includes outer shroud, inner ring and rubber diaphragm, described rubber diaphragm profile is taper type, there is overhanging edge, described edge is with twice semicircle seal convexity, described edge is clamped between described outer shroud and described inner ring, two pass redundant seal is formed by seal convexity semicircle described in twice, described inner ring uses laser segmented plane-welding with outer shroud, the periphery of described outer shroud has solder-bump, described upper shell, described lower house and described solder-bump weld together, thus form air cavity by described black box and described upper housing component, sap cavity is formed by described black box and described lower house assembly.
The most described upper shell top has gas port portion at axis, at described gas port portion assembling core assembly composition charge valve, described core assembly includes spool, spring and valve seat, and it is sequentially loaded into the inner chamber in described upper shell gas port portion in this order, described spring is positioned at the positioning chamber of described spool and described valve seat, described valve seat is welded on described upper shell, use plane bacterium shape metal-non-metal to seal structure between described core assembly and described upper shell gas port portion, use mesh shape to seal structure at described inflation inlet and carry out redundant seal.
The most described lower house sidewall includes column part and the frusto-conical portion with described rubber diaphragm form fit, described column part outer wall is with three ear shape fixed lobes, there is at axis bottom described frusto-conical portion liquid oral area, described liquid oral area has outlet, described filter assemblies is formed with screen pack spot welding by circular orifice, and it being welded on described liquid oral area, the circulation area of described filter assemblies is more than the circulation area of described outlet.
The bus of the most described taper type and the angle of axis are 45 °.
The material of main part of preferably described rubber diaphragm is ethylene propylene diene rubber, and to add brocade silk be 0.5mm as support frame, described rubber diaphragm thickness.
The most described outer shroud is identical with described inner ring wall thickness, with semi-cylindrical hill in described inner ring, described outer shroud has corresponding semi-circular recesses, when both coordinate compression, it is achieved grip described rubber diaphragm.
Every section of fusion length that the most described inner ring is welded with described outer shroud sectional plan is between 15mm～30mm, and is uniformly distributed circumferentially.
The most also have for being arranged on described liquid oral area and the protective cap in described gas port portion.
The invention have benefit that:
1, the connected mode of critical piece is welding, has both improve the reliability of sealing, has reduced again product weight；
2, all use redundant seal to design at critical seal position, substantially increase the reliability of sealing；
3, rubber diaphragm is designed as taper type, it is simple to rubber diaphragm upset and recovery；Rubber diaphragm material selects soft, high airtight sizing material, uses brocade silk as support frame, is improving rubber diaphragm intensity with the while of bubble-tight, reducing diaphragm thickness, improves rubber diaphragm to the sensitiveness of pressure and fatigue durability；
4, rubber diaphragm fixed form is inner and outer rings clamp structure, and inner ring and outer shroud use laser segmented plane-welding to position, and while ensureing reliable location, it is simple to assembly and test, simultaneously relative to threaded, alleviates weight.
Accompanying drawing explanation
Fig. 1 is reservoir overall structure cut away view.
Fig. 2 is upper housing component structure cut away view.
Fig. 3 is bacterium shape sealed structural representation.
Fig. 4 is that black box assembles schematic diagram.
Fig. 5 is inner ring structural representation.
Fig. 6 is outer ring structure schematic diagram.
Fig. 7 is rubber diaphragm structural representation.
Fig. 8 is that lower house assembly assembles schematic diagram.
Fig. 9 is that filter assemblies assembles schematic diagram.
Detailed description of the invention
Referring to the drawings, the present invention is described in detail.
Fig. 1 is reservoir overall structure cut away view, and it is mainly by upper housing component (1,2,3,4,5,6,7), lower house assembly (10,12,13), black box (8,9,11) composition, upper housing component (1,2,3,4,5,6,7), lower house assembly (10,12,13), black box (8,9,11) connected by electron beam welding manner, weld seam according to GJB1718A-2005 " electron beam welding " I level perform.Owing to electron beam welding line is narrow, speed of welding is fast, and heat-affected zone is little, both ensure that overall airtight, and avoided again the high temperature ageing of the rubber diaphragm of black box after welding.Before welding, by upper housing component (1, 2, 3, 4, 5, 6, 7) upper shell 7, lower house assembly (10, 12, 13) lower house 10 is along black box (8, 9, 11) welding locating surface (as shown in Figure 4) assembles, and compress the solder-bump (as shown in Figure 4) on outer shroud 8, then vacuum electron beam welding is used three circumferentially to be welded together, so by upper shell 7 and black box (8, 9, 11) rubber diaphragm 11 forms air cavity, and by black box (8, 9, 11) rubber diaphragm 11 and lower house 10 form sap cavity.With specific purpose tool, spool 4 is opened before welding, then vacuumize and weld, for avoiding the high temperature ageing of rubber diaphragm 11, segmentation to weld.After having welded, the inflation inlet (in Fig. 1 at H) at charge valve loads O-ring seals 3, plug 2 successively, tightens cap nut 1, it is achieved two-stage sealing.Reservoir is before non-access system, and protective cap 14 to be added is dust-proof.
Fig. 2 is upper housing component (1,2,3,4,5,6,7) structure cut away view, upper shell 7 top has gas port portion, during assembling at axis, first spool 4, spring 5 are sequentially loaded into the inner chamber in upper shell 7 gas port portion, the most slowly screw in valve seat 6, assembling process spring to be ensured 5 be placed in spool 4 with in the positioning chamber of valve seat 6, finally valve seat 6 and upper shell 7 are carried out spot welding locking, form charge valve (4,5,6,7).Charge valve (4,5,6,7) use plane bacterium shape metal-non-metal to seal structure between spool 4 and upper shell 7, at the inflation inlet of charge valve, use mesh shape to seal structure (1,2,3) carry out redundant seal, further increase the reliability of sealing.
Fig. 3 is bacterium shape metal-non-metal sealed structural representation, spool 4 is mainly formed by Copper substrate is bonding with the vulcanization of rubber, after inflation, relies on spring 5 compression stress and chamber pressure the bacterium shape projection of rubber with upper shell 7 to be compressed, realize sealing, this sealing is referred to as bacterium shape metal-non-metal and seals structure.
By using integral solder and the design of redundant seal, through helium Mass Spectrometer Method, under 0.2Mpa pressure, the outer leak rate of reservoir is less than 10-8Pa·m3/ s, fully meets the requirement of the external leak rate of space environment
Fig. 4 is that black box assembles schematic diagram, and the profile of rubber diaphragm 11 is taper type, has overhanging edge, and this edge is with twice semicircle seal convexity.During assembling, first rubber diaphragm 11 edge is flattened and put into outer shroud 8, ensure that twice semicircle seal convexity (as shown in Figure 7) at edge are fully contacted with outer ring seal plane, then inner ring 9 is inserted in outer shroud 8, with semi-cylindrical hill (as shown in Figure 5) in inner ring 9, semi-circular recesses (as shown in Figure 6) should be had mutually on outer shroud 8, rely on specific purpose tool by inner ring 9, outer shroud 8 welds after compressing, while realizing the gripping of rubber diaphragm 11, by twice semicircle seal convexity (as shown in Figure 7) at compressing rubber diaphragm 11 edge, realize the isolation of air cavity and sap cavity.Inner ring 9 and outer shroud 8 use laser segmented plane-welding (welding position is as shown in Figure 4) to position, weld inner ring 9 is consistent with outer shroud 8 wall thickness, for while ensureing weld strength, avoid rubber diaphragm 11 high temperature ageing, every section of fusion length is between 15mm～30mm, and weld seam is uniformly distributed circumferentially.
Black box (8,9,11) twice semicircle seal convexity (as shown in Figure 7) relying on outer shroud 8 and inner ring 9 to compress rubber diaphragm 11 edge realize the air cavity isolation with sap cavity, and this sealing means is two pass redundant seal, improves sealing reliability；Inner ring 9 and outer shroud 8 use laser segmented plane-welding (as shown in Figure 4) to position, Laser Welding Speed is fast, heat-affected zone is little, heat accumulation can be reduced further after segmentation, this welding manner can make welding position and rubber diaphragm 11 apart from the shortest, while avoiding welding waste heat infringement rubber diaphragm 11, it is ensured that the decrement of semicircle seal convexity, further increase the reliability of sealing.
By redundant seal, the material of reasonable selecting membrane and grip mode, through helium Mass Spectrometer Method, under 0.2MPa pressure, the interior leak rate of reservoir is less than 10-5Pa·m3/ s, fully meets use requirement.
Rubber diaphragm 11 material of main part is ethylene propylene diene rubber, this elastomeric material has good air-tightness, its hardness (Shao Er) is 50, and use brocade silk as support frame, thickness is only 0.5mm, this design is ensureing that rubber diaphragm 11 intensity, with the while of bubble-tight, improves rubber diaphragm 11 to the sensitiveness of pressure and fatigue durability.Rubber diaphragm 11 profile is designed as taper type, and cone angle (angle of bus coaxial line) is 45 °, while ensureing air cavity volume, it is simple to rubber diaphragm 11 upset and recovery.
Through test determination, under 0.0006MPa pressure reduction, rubber diaphragm (11) can be totally turned over and recover.
Fig. 8 is that lower house assembly assembles schematic diagram.Lower house 7 sidewall includes column part and the frusto-conical portion with rubber diaphragm 11 form fit, column part outer wall is with three ear shape fixed lobes, there is at axis bottom frusto-conical portion liquid oral area, liquid oral area has outlet Y, frusto-conical portion near liquid oral area has detent, during assembling, first by filter assemblies (12, 13) it is positioned in detent, then at filter assemblies (12, 13) edge uses argon arc welding segmentation welding to be fixed, the cone angle (angle of bus coaxial line) of lower house 10 sidewall frusto-conical portion is 45 °, column part outer wall is with three ear shape fixed lobes, for reservoir is fixed on circuit system.Fig. 9 is filter assemblies (12,13) structural representation, and it is with circular orifice 12 as support frame, screen pack 13 spot welding of certain mesh number is fixed on circular orifice 12, and filter assemblies (12,13) is welded on liquid oral area.During design, it is ensured that the circulation area of filter assemblies (12,13) is greater than the circulation area at outlet Y (such as Fig. 1) place.
After said modules has been assembled, reservoir occupation mode is as follows:
1, the mode of welding is used to access single-phase thermal control fluid circuit (such as Fig. 1) pipeline at reservoir Y；
2, unload O-ring seals 3, plug 2, cap nut 1, by specific purpose tool, reservoir air cavity is vacuumized with sap cavity simultaneously, then from the filler in loop, working medium is injected in reservoir；
3, specific purpose tool is utilized to be filled with the nitrogen of certain pressure intensity, and pressurize a period of time from inflation inlet H；
4, lay down specific purpose tool, load O-ring seals, plug at inflation inlet (in Fig. 1 at H) successively, tighten cap nut.
After above-mentioned steps completes, reservoir relies on compressibility and the deformation of rubber half film of gas, maintains fluid circuit pressure in working range, compensates loop leakage of working medium in long-play, it is achieved voltage stabilizing, the purpose of design of mending-leakage.
Total measurement (volume) 550ml of the present invention, under 0.0006MPa pressure reduction, rubber diaphragm can be totally turned over and recover, and at 25 DEG C when air cavity pressure is reduced to 0.09MPa by 0.2MPa, liquid discharge rate is 275ml, outer leak rate≤10-8Pa·m3/s.The present invention is applied to the Fluid for Single-phase Fluid Loop System of the small-sized spacecrafts such as satellite, is also applied for all kinds of enclosed low-pressure fluid loop.
Above the preferred embodiment of the present invention is illustrated, but the present invention is not limited to above-described embodiment.It will be apparent to those skilled in the art that in the category described in claims, it should be apparent that it is conceivable that various modification or fixed case, certainly fall within the technology category of the present invention.
Claims (8)
1. a minute-pressure response reservoir, it is characterised in that: include upper housing component, lower house
Assembly and black box；Described upper housing component includes core assembly and upper shell；Described lower casing
Body assembly includes filter assemblies and lower house；Described black box includes outer shroud, inner ring and rubber
Diaphragm, described rubber diaphragm profile is taper type, has overhanging edge, described edge with
Twice semicircle seal convexity, described edge is clamped between described outer shroud and described inner ring,
Forming two pass redundant seal by seal convexity semicircle described in twice, described inner ring is adopted with outer shroud
Laser segmented plane-welding, the periphery of described outer shroud is used to have a solder-bump, described upper shell,
Described lower house and described solder-bump weld together, thus by described black box and institute
State upper housing component and form air cavity, form liquid by described black box and described lower house assembly
Chamber.
Minute-pressure the most according to claim 1 response reservoir, it is characterised in that: on described
Having gas port portion at housing upper axis, described core assembly includes spool, spring and valve seat,
Inner chamber in described gas port portion is sequentially loaded into described spool, described spring and described valve seat and forms
Charge valve, described spring is positioned at the positioning chamber of described spool and described valve seat, and described valve seat welds
It is connected on described upper shell, between described core assembly and described upper shell gas port portion, uses plane
The nonmetal sealing structure of bacterium shape metal one, uses mesh shape to seal knot at the inflation inlet of described charge valve
Structure carries out redundant seal.
Minute-pressure the most according to claim 1 response reservoir, it is characterised in that: under described
Housing sidewall includes column part and the frusto-conical portion with described rubber diaphragm form fit, described
Column part outer wall, with three ear shape fixed lobes, has at axis bottom described frusto-conical portion
Liquid oral area, described liquid oral area is had to have outlet, on the frusto-conical portion near described liquid oral area
Having detent, described filter assemblies is formed with screen pack spot welding by circular orifice, and welds
Being connected in described detent, the circulation area of described filter assemblies is more than the stream of described outlet
Logical area.
4. respond reservoir, its feature according to the minute-pressure according to any one of claims 1 to 3
It is: the bus of described taper type and the angle of axis are 45 °.
5. respond reservoir, its feature according to the minute-pressure according to any one of claims 1 to 3
It is: the material of main part of described rubber diaphragm is ethylene propylene diene rubber, and adds brocade silk work
For support frame, described rubber diaphragm thickness is 0.5mm.
6. respond reservoir, its feature according to the minute-pressure according to any one of claims 1 to 3
It is: described outer shroud is identical with described inner ring wall thickness, with semi-cylindrical hill in described inner ring,
Corresponding semi-circular recesses is had, when both coordinate compression, it is achieved to described rubber on described outer shroud
Gripping of diaphragm.
7. respond reservoir, its feature according to the minute-pressure according to any one of claims 1 to 3
Be: every section of fusion length that described inner ring is welded with described outer shroud sectional plan at 15mm～
Between 30mm, and it is uniformly distributed circumferentially.
8. respond reservoir, its feature according to the minute-pressure according to any one of claims 1 to 3
It is: also have for being arranged on described liquid oral area and the protective cap in described gas port portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410753573.1A CN105889145B (en) | 2014-12-11 | 2014-12-11 | Minute-pressure responds liquid storage device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410753573.1A CN105889145B (en) | 2014-12-11 | 2014-12-11 | Minute-pressure responds liquid storage device |
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| CN105889145A true CN105889145A (en) | 2016-08-24 |
| CN105889145B CN105889145B (en) | 2018-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410753573.1A Expired - Fee Related CN105889145B (en) | 2014-12-11 | 2014-12-11 | Minute-pressure responds liquid storage device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108533758A (en) * | 2018-05-23 | 2018-09-14 | 华中科技大学 | It is a kind of can inflation/deflation double-layer sealing structure and gas spring |
| CN116696606A (en) * | 2023-08-07 | 2023-09-05 | 东方空间技术(山东)有限公司 | Exhaust device of propellant storage tank of carrier rocket |
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| US4449552A (en) * | 1981-02-27 | 1984-05-22 | Hydro Rene Leduc | Prestressed assembled oleo-pneumatic accumulators |
| US6295918B1 (en) * | 1999-10-15 | 2001-10-02 | John M. Simmons | Suspended diaphragm |
| WO2004074693A1 (en) * | 2003-02-22 | 2004-09-02 | Hydac Technology Gmbh | Storage device, preferably diaphragm accumulator |
| CN202789776U (en) * | 2012-08-31 | 2013-03-13 | 刘瑞川 | Special diaphragm accumulator for hybrid power automobile |
| CN202883512U (en) * | 2012-11-07 | 2013-04-17 | 王凯 | Straight diaphragm accumulator |
| CN103206417A (en) * | 2013-05-06 | 2013-07-17 | 布柯玛蓄能器（天津）有限公司 | 70MPa stainless steel diaphragm type energy accumulator |
| CN103362878A (en) * | 2012-03-27 | 2013-10-23 | 上海御能动力科技有限公司 | Capacity-adjustable diaphragm-type pulsation absorbing energy accumulator |
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2014
- 2014-12-11 CN CN201410753573.1A patent/CN105889145B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4449552A (en) * | 1981-02-27 | 1984-05-22 | Hydro Rene Leduc | Prestressed assembled oleo-pneumatic accumulators |
| US6295918B1 (en) * | 1999-10-15 | 2001-10-02 | John M. Simmons | Suspended diaphragm |
| WO2004074693A1 (en) * | 2003-02-22 | 2004-09-02 | Hydac Technology Gmbh | Storage device, preferably diaphragm accumulator |
| CN103362878A (en) * | 2012-03-27 | 2013-10-23 | 上海御能动力科技有限公司 | Capacity-adjustable diaphragm-type pulsation absorbing energy accumulator |
| CN202789776U (en) * | 2012-08-31 | 2013-03-13 | 刘瑞川 | Special diaphragm accumulator for hybrid power automobile |
| CN202883512U (en) * | 2012-11-07 | 2013-04-17 | 王凯 | Straight diaphragm accumulator |
| CN103206417A (en) * | 2013-05-06 | 2013-07-17 | 布柯玛蓄能器（天津）有限公司 | 70MPa stainless steel diaphragm type energy accumulator |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108533758A (en) * | 2018-05-23 | 2018-09-14 | 华中科技大学 | It is a kind of can inflation/deflation double-layer sealing structure and gas spring |
| CN108533758B (en) * | 2018-05-23 | 2019-09-13 | 华中科技大学 | It is a kind of can inflation/deflation double-layer sealing structure and gas spring |
| CN116696606A (en) * | 2023-08-07 | 2023-09-05 | 东方空间技术(山东)有限公司 | Exhaust device of propellant storage tank of carrier rocket |
| CN116696606B (en) * | 2023-08-07 | 2023-10-27 | 东方空间技术(山东)有限公司 | Exhaust device of propellant storage tank of carrier rocket |
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| CN105889145B (en) | 2018-11-16 |
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Granted publication date: 20181116 Termination date: 20191211 |