CN103566656B - Space flight pure oxygen filter and welding method thereof - Google Patents
Space flight pure oxygen filter and welding method thereof Download PDFInfo
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- CN103566656B CN103566656B CN201210280795.7A CN201210280795A CN103566656B CN 103566656 B CN103566656 B CN 103566656B CN 201210280795 A CN201210280795 A CN 201210280795A CN 103566656 B CN103566656 B CN 103566656B
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Abstract
The object of this invention is to provide a kind of space flight pure oxygen filter, this filter surfaces quality and non-oxidizability very high, the working strength of filter core self is large.Present invention also offers the welding method of this kind of space flight pure oxygen filter element, ensure the high-temperature anticorrosive of the quality stability of core wire, closure and raising core wire.The technical scheme that the present invention uses is as follows: space flight pure oxygen filter, comprise upper and lower casing, filter core and sealing gasket, filter core is all-welded structure, it comprises frame of filter element and filter element filtering layer, filter element filtering layer adopts tin bronze sintered meshwork, frame of filter element is made up of skeleton stack shell and the technique step that is arranged on its two ends, and filter element filtering layer adopts tin bronze sintered meshwork, and tin bronze sintered meshwork is rolled in tube of skeleton and the medial surface of the technique step of skeleton is close on both sides with it; Sealing gasket is red copper.This invention achieves effective, safety filtering to pure oxygen, for oxygen system pressure test provides reliable guarantee, and is the very large benefit of company's creation.
Description
Technical field
The present invention relates to a kind of filter, the special space flight pure oxygen filter that especially a kind of rocket fuel oxygen system testing stand filters pure oxygen at the trial and welding method thereof.
Background technology
For ensureing rocket flight safety, various ground performance detection must be carried out to rocket before flight.The detection whether good to rocket fuel oxygen system service behaviour is also one of important test item, and the pure oxygen in oxygen system need be filtered rear feed point ignition system.The filter of present filtration pure oxygen adopts stainless steel, and stainless steel easily produces spark when larger compression shock, and pure oxygen is met spark and easily produced blast, thus there is potential safety hazard.Also there is following problem in the filter core of filter interior in addition on welding manner:
Argon arc welding welding manner: argon arc welding arc flame is unstable, heat-affected zone is large, and weld seam is irregular easily to deform;
Plasma weldering welding manner: plasma welding arc flame is more stable, and weld seam is oxidizable, and high-temperature anticorrosive is poor;
Laser Welding welding manner: highly reflective and high conductivity material are as aluminium, copper and alloy, and weldability can Stimulated Light change.
Summary of the invention
The object of this invention is to provide a kind of space flight pure oxygen filter, this filter surfaces quality and non-oxidizability very high, the working strength of filter core self is large.Present invention also offers the welding method of this kind of space flight pure oxygen filter, the method can ensure the quality stability of core wire, closure and improve the high-temperature anticorrosive of core wire.
The technical scheme that the present invention uses is as follows: space flight pure oxygen filter, comprise upper shell 1, lower house 4, filter core 2 and sealing gasket 3, filter core 2 is all-welded structure, it comprises frame of filter element 21 and filter element filtering layer 22, filter element filtering layer 22 adopts tin bronze sintered meshwork, frame of filter element 21 comprises skeleton stack shell and is arranged on the technique step 211 at its two ends, and tin bronze sintered meshwork is rolled in tube of skeleton and the medial surface of the technique step 211 of skeleton is close on both sides with it; Sealing gasket 3 is red copper.
The upper and lower casing of space flight pure oxygen filter of the present invention, the material of frame of filter element all select tin bronze or monel.
Tin bronze sintered meshwork to be weaved silk screen by lamination compacting and the multiple layer metal of vacuum-sintering.
Because the characteristic that spark easily produces blast met by pure oxygen, the upper and lower casing of pure oxygen filter, the material of frame of filter element all select tin bronze or monel, and tin bronze sintered meshwork selected by filter element filtering net.Tin bronze has higher mechanical property, Wear vesistance and corrosion resistance, Cutting free process, soldering and melting welding performance good, constriction coefficient is little, nonmagnetic, does not produce spark during impact.Sealing gasket material selection red copper.Thus ensure that the safe and reliable conveying of pure oxygen.
Filter element adopts electron beam all-welded structure.Tin bronze sintered meshwork is that multiple layer metal is woven silk screen, is formed, have higher mechanical strength and extraordinary integral rigidity structure by manufacture technics such as lamination compacting and vacuum-sinterings.The mesh of each layer silk screen is interlaced, form a kind of homogeneous and desirable filtration, reasonably coupling and design can be carried out to the pore size of material, permeance property and strength characteristics, thus make it have excellent filtering accuracy, filtration impedance, mechanical strength, wearability, heat resistance and processed property, filter effect is seemed and easily controls.Because its strobe utility is both surface filtration, and mesh duct is smooth, therefore it has excellent backwash and regeneration performance, can Long-Time Service repeatedly, is particularly suitable for the operating process of serialization and automation.
Frame of filter element is by tin-bronze rod or monel processing and fabricating, and skeleton two ends are provided with technique step at the place of being welded to connect with tin bronze sintered meshwork two ends; Be rolled on skeleton when welding by tin bronze sintered meshwork, its two ends note closes the medial surface of the technique step at skeleton two ends; Adopt electro-beam welding method to carry out tin bronze sintered meshwork to weld and two ends circumference soldering with the axial joint close of skeleton.
Skeleton two ends are provided with technique step at the place of being welded to connect with tin bronze sintered meshwork two ends, ensure that the all-welded structure of filter element and the working strength of filter core self; Because electron beam welding carries out under vacuum conditions, the surface quality of weld seam and non-oxidizability are very high, greatly improve welding performance and the serviceability of filter core, enhance weld strength, extend service life.
Accompanying drawing explanation
Fig. 1 is the structural representation of space flight pure oxygen filter of the present invention
The filter cartridge construction figure that Fig. 2 is filter shown in Fig. 1
The filter core process area stage structure figure that Fig. 3 is filter shown in Fig. 1
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation
Space flight pure oxygen filter of the present invention comprises upper shell, filter lower house, filter core, sealing gasket four part, as Fig. 1, the design processing of this filter, assembling and material selection all meet the requirement of concerned countries standard and professional standard, upper and lower casing connection sealing is good, meet two way seal, compact conformation, processing performance are good.
The upper and lower casing of pure oxygen filter, the material of frame of filter element parts all select tin bronze or monel, filter element adopts electron beam all-welded structure as shown in Figure 2, it comprises frame of filter element 21 and filter element filtering layer 22, filter element filtering layer 22 adopts tin bronze sintered meshwork, frame of filter element 21 comprises skeleton stack shell and is arranged on the technique step 211 at its two ends, and tin bronze sintered meshwork is rolled in tube of skeleton and the medial surface of the technique step 211 of skeleton is close on both sides with it; The material of sealing gasket 3 is red copper.Tin bronze sintered meshwork is that multiple layer metal is woven silk screen, is formed, have higher mechanical strength and extraordinary integral rigidity structure by manufacture technics such as lamination compacting and vacuum-sinterings.
Frame of filter element is by tin-bronze rod or monel processing and fabricating, and be the working strength of the all-welded structure and filter core self that realize filter element, as shown in Figure 3, skeleton two ends are being provided with technique step with the tin bronze sintered meshwork two ends place of being welded to connect.First be rolled on skeleton by tin bronze sintered meshwork when welding, the axis adopting electronics weldering to realize tin bronze sintered meshwork is closed and is met welding, and tin bronze sintered meshwork and skeleton are fitted tightly.Carry out the technique step at skeleton two ends and the circumference soldering at tin bronze sintered meshwork two ends afterwards.Because electron beam welding carries out under vacuum conditions, the surface quality of weld seam and non-oxidizability are very high, greatly improve welding performance and the serviceability of filter core, enhance weld strength, extend service life.
The invention provides welding method as follows:
Step one: respectively frame of filter element, tin bronze sintered meshwork and the frock clamp that matches with it are processed;
Step 2: the greasy dirt on frame of filter element, tin bronze sintered meshwork and welding tool setup surface is removed in cleaning, prevents from producing bubble in welding process; With clean acetone soln cleaning workpiece and frock clamp, then dry or dry, requirement is dried or is dried rear without greasy dirt vestige;
Step 3: first tin bronze sintered meshwork is rolled on skeleton, the medial surface of the technique step at its two ends and skeleton two ends is fitted, then frame of filter element, tin bronze sintered meshwork welding tool setup is assembled; During assembling, the abutment joint of frame of filter element, tin bronze sintered meshwork requires the centre being positioned at weld jig reserving gaps, and abutment joint is straight, the width of fixture reserving gaps is maximum is no more than 3mm, and frame of filter element, tin bronze sintered meshwork will be adjacent to weld jig and fix;
Step 4: by the frame of filter element assembled, tin bronze sintered meshwork clamping to welding chamber; The weld jig assembled will be fixed in welding chamber, prevents the position when welding to be moved;
Step 5: the frame of filter element that soldering group installs, tin bronze sintered meshwork;
(1) shut welding booth's door and vacuumize: when welding booth's vacuum reaches the high vacuum of setting, ready lamp is bright, ER equipment ready;
(2) welding parameter is adjusted: parameter comprises focusing, bias voltage, filament, high pressure, line, weld interval, straight line or rotary speed etc.;
The range of choice of high pressure is: 0 ~ 60kV;
The range of choice of filament is: 0 ~ 20mA;
The range of choice of bias voltage is: 0 ~ 1800V;
Focusing is divided into surface focusing, upper focusing and lower focusing, and during upper focusing welding, electron beam is more soft, and surface forming is good, and penetration capacity is poor; During lower focusing welding, penetration capacity is strong, and surface forming is poor;
(3) weld: press lower bundle button and rotary handle, lower bundle welding.
(4) smooth, the even weld in welding rear surface is required, without solder skip phenomenon.
Step 6: welding oxidation tint is removed in cleaning.
Step 7: do filter cartridge construction integrity test.
Embodiment 1:
Step one: respectively frame of filter element, tin bronze sintered meshwork and the frock clamp that matches with it are processed;
Step 2: the greasy dirt on frame of filter element, tin bronze sintered meshwork and welding tool setup surface is removed in cleaning, prevents from producing bubble in welding process; With clean acetone soln cleaning workpiece and frock clamp, then dry or dry, requirement is dried or is dried rear without greasy dirt vestige;
Step 3: first tin bronze sintered meshwork is rolled on skeleton, the medial surface of the technique step at its two ends and skeleton two ends is fitted, then frame of filter element, tin bronze sintered meshwork welding tool setup is assembled; During assembling, want frame of filter element, centre that the abutment joint of tin bronze sintered meshwork requires to be positioned at weld jig reserving gaps, and abutment joint is straight, the width of fixture reserving gaps is maximum is no more than 3mm, and frame of filter element, tin bronze sintered meshwork will be adjacent to weld jig and fix;
Step 4: by the frame of filter element assembled, tin bronze sintered meshwork clamping to welding chamber; The weld jig assembled will be fixed in welding chamber, prevents the position when welding to be moved;
Step 5: the frame of filter element that soldering group installs, tin bronze sintered meshwork;
(1) shut welding booth's door and vacuumize: when welding booth's vacuum reaches the high vacuum of setting, ready lamp is bright, ER equipment ready;
(2) welding parameter is adjusted: parameter comprises focusing, bias voltage, filament, high pressure, line, weld interval, straight line or rotary speed etc.;
The range of choice of high pressure is: 40kV,
The range of choice of filament is: 19mA,
The range of choice of bias voltage is: 800V,
(3) weld: press lower bundle button and rotary handle, lower bundle welding.
(4) smooth, the even weld in welding rear surface is required, without solder skip phenomenon.
Step 6: welding oxidation tint is removed in cleaning.
Step 7: do filter cartridge construction integrity test.
Embodiment 2
Other step is with embodiment 1, and welding parameter of electron beam is respectively:
The range of choice of high pressure is: 50kV,
The range of choice of filament is: 19.5mA,
The range of choice of bias voltage is: 1200V,
Embodiment 3
Other step is with embodiment 1, and welding parameter of electron beam is respectively:
The range of choice of high pressure is: 60kV,
The range of choice of filament is: 20mA,
The range of choice of bias voltage is: 1800V,
Following table is filter element integrity test of the present invention report, and filter work system requires that filter core emits bubble point to be greater than 600 Pa.
| Sequence number | First bubbling pressure | Group's bubbling pressure | Result of the test |
| 1 | 850Pa | 920 Pa | Qualified |
| 2 | 880 Pa | 920 Pa | Qualified |
| 3 | 800 Pa | 900 Pa | Qualified |
| 4 | 650 Pa | 900 Pa | Qualified |
| 5 | 800 Pa | 900 Pa | Qualified |
| 6 | 800 Pa | 920 Pa | Qualified |
| 7 | 850 Pa | 1020 Pa | Qualified |
Adopt electron beam welding welding method to achieve the all-welded structure of filter element, because electron beam welding carries out under vacuum conditions, surface quality and non-oxidizability are very high, greatly improve welding performance and serviceability.And ensure that filter core can bear under the condition of work of 35MPa and be not less than 200 times repeatedly wash away, guarantee the service life of filter.This invention achieves effective, safety filtering to pure oxygen, for oxygen system pressure test provides reliable guarantee, fills up industry blank, and is the very large benefit of company's creation.
The above; be only the present invention's preferably detailed description of the invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (1)
1. the welding method of space flight pure oxygen filter, comprises the steps: step one: process frame of filter element, tin bronze sintered meshwork and the frock clamp that matches with it respectively; Step 2: the greasy dirt removing frame of filter element, tin bronze sintered meshwork and welding tool setup surface with the cleaning of clean acetone soln, then dries or dries; Step 3: be rolled on frame of filter element by tin bronze sintered meshwork, assembles frame of filter element, tin bronze sintered meshwork welding tool setup; During assembling, want the abutment joint of welding work pieces to require to be positioned at the centre of weld jig reserving gaps, and abutment joint is straight, and the width of fixture reserving gaps is maximum is no more than 3mm, and frame of filter element, tin bronze sintered meshwork will be adjacent to weld jig and fix; Step 4: by the frame of filter element that assembles and tin bronze sintered meshwork clamping to welding chamber; Step 5: the workpiece that soldering group installs: (1) shuts welding booth's door and vacuumizes: (2) adjustment welding parameter: the range of choice of high pressure is: 0 ~ 60kV; The range of choice of filament is: 0 ~ 20mA; The range of choice of bias voltage is: 0 ~ 1800V; 3) weld: press lower bundle button and rotary handle, lower bundle welding; Step 6: welding oxidation tint is removed in cleaning.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210280795.7A CN103566656B (en) | 2012-08-09 | 2012-08-09 | Space flight pure oxygen filter and welding method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210280795.7A CN103566656B (en) | 2012-08-09 | 2012-08-09 | Space flight pure oxygen filter and welding method thereof |
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| Publication Number | Publication Date |
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| CN103566656A CN103566656A (en) | 2014-02-12 |
| CN103566656B true CN103566656B (en) | 2015-09-23 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105854426B (en) * | 2016-05-13 | 2023-09-12 | 新乡市天诚航空净化设备有限公司 | Inertial dust remover |
| CN107875707B (en) * | 2017-12-21 | 2023-03-17 | 新乡市天诚航空净化设备有限公司 | Filter element of tank liquid path filter and welding method thereof |
| CN108788358B (en) * | 2018-08-27 | 2020-11-03 | 新乡市滤清器有限公司 | Brazing filter element and welding process |
| CN109128542B (en) * | 2018-10-09 | 2020-11-24 | 华北水利水电大学 | Method for compositely welding stainless steel seawater filter element by laser spot welding and vacuum brazing |
| CN111843138A (en) * | 2020-07-07 | 2020-10-30 | 河南航天液压气动技术有限公司 | Welding method of filter |
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| CN2182878Y (en) * | 1994-05-12 | 1994-11-16 | 刘星海 | Fine filtering device for cleaning water filled well |
| CN2708982Y (en) * | 2004-06-16 | 2005-07-13 | 辽宁科隆化工实业有限公司 | Filter |
| CN101537274A (en) * | 2009-03-06 | 2009-09-23 | 南通航海机械有限公司 | Fabricating method of block net type candle filter element |
| CN202844731U (en) * | 2012-08-09 | 2013-04-03 | 新乡市天诚航空净化设备有限公司 | Pure oxygen filter for spaceflight |
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2012
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2182878Y (en) * | 1994-05-12 | 1994-11-16 | 刘星海 | Fine filtering device for cleaning water filled well |
| CN2708982Y (en) * | 2004-06-16 | 2005-07-13 | 辽宁科隆化工实业有限公司 | Filter |
| CN101537274A (en) * | 2009-03-06 | 2009-09-23 | 南通航海机械有限公司 | Fabricating method of block net type candle filter element |
| CN202844731U (en) * | 2012-08-09 | 2013-04-03 | 新乡市天诚航空净化设备有限公司 | Pure oxygen filter for spaceflight |
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