CN103566656A - Aerospace pure oxygen filter and welding method thereof - Google Patents
Aerospace pure oxygen filter and welding method thereof Download PDFInfo
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- CN103566656A CN103566656A CN201210280795.7A CN201210280795A CN103566656A CN 103566656 A CN103566656 A CN 103566656A CN 201210280795 A CN201210280795 A CN 201210280795A CN 103566656 A CN103566656 A CN 103566656A
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Abstract
The invention aims at providing an aerospace pure oxygen filter. The surface quality and the oxidation resistance of the filter are very high, and the using strength of a filter element is great. The invention further provides a welding method of the filter element of the aerospace pure oxygen filter. By adopting the welding method, the quality stability and the closeness of a welding core are ensured and the high-temperature corrosion resistance of the welding core is improved. According to the technical scheme, the aerospace pure oxygen filter comprises an upper housing, a lower housing, the filter element and a sealing pad, wherein the filter element is in a fully welded structure and comprises a filter element framework and a filter element filter layer, the filter element filter layer adopts a tin bronze sintered mesh, the filter element framework comprises a framework cylinder body and process steps arranged at the two ends of the framework cylinder body, the filter element filter layer adopts the tin bronze sintered mesh, the tin bronze sintered mesh is wrapped on the framework cylinder body, and the two sides of the tin bronze sintered mesh are close to the inner side surfaces of the process steps of the framework; the sealing pad is made of red copper. The aerospace pure oxygen filter provided by the invention can realize effective and safe filtration of pure oxygen, provide a reliable guarantee for pressure testing of an oxygen supply system and create great benefits for a company.
Description
Technical field
The present invention relates to a kind of filter, special-purpose space flight pure oxygen filter and welding method thereof that especially a kind of rocket fuel oxygen system testing stand filters pure oxygen at the trial.
Background technology
For guaranteeing rocket flight safety, before flight, must carry out various ground performance detections to rocket.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 that filters now 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 the potential safety hazard of existence.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, and heat-affected zone is large, 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 are very high, and the working strength of filter core self is large.The present invention also provides the welding method of this kind of space flight pure oxygen filter, and the method can guarantee quality stability, the closure of core wire 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 with it and the medial surface of the technique step 211 of skeleton is close on both sides; 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 are all selected tin bronze or monel.
Tin bronze sintered meshwork is to suppress the multiple layer metal weaving silk screen with vacuum-sintering by lamination.
Because pure oxygen is met the characteristic that spark easily produces blast, the upper and lower casing of pure oxygen filter, the material of frame of filter element are all selected tin bronze or monel, and filter element filtering net is selected tin bronze sintered meshwork.Tin bronze has higher mechanical property, Wear vesistance and corrosion resistance, easy machining, and soldering and melting welding performance are good, and constriction coefficient is little, nonmagnetic, does not produce spark during impact.Sealing gasket material is selected red copper.Thereby guaranteed 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 to silk screen, by lamination, is suppressed with the technique manufacture such as vacuum-sintering and is formed, and has higher mechanical strength and extraordinary integral rigidity structure.The mesh of each layer of silk screen is interlaced, form a kind of homogeneous and desirable filtration, can carry out reasonably coupling and design to the pore size of material, permeance property and strength characteristics, thereby make it have good filtering accuracy, filter impedance, mechanical strength, wearability, heat resistance and processed property, filter effect is seemed and easily control.Because its strobe utility is both surface filtration, and mesh duct is smooth, therefore it has excellent backwash and regeneration performance, can repeatedly use for a long time, 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 being provided with technique step with the place of being welded to connect at tin bronze sintered meshwork two ends; When welding, tin bronze sintered meshwork is rolled on skeleton, its two ends note closes the medial surface of the technique step at skeleton two ends; Adopt electro-beam welding method to carry out axial joint close welding and the two ends circumference soldering of tin bronze sintered meshwork and skeleton.
Skeleton two ends are being provided with technique step with the place of being welded to connect at tin bronze sintered meshwork two ends, have guaranteed the all-welded structure of filter element and the working strength of filter core self; Because electron beam welding is to carry out under vacuum state, the surface quality of weld seam and non-oxidizability are very high, have improved greatly welding performance and the serviceability of filter core, have strengthened weld strength, have extended service life.
Accompanying drawing explanation
Fig. 1 is the structural representation of space flight pure oxygen filter of the present invention
Fig. 2 is the filter cartridge construction figure of filter shown in Fig. 1
Fig. 3 is the filter core process area stage structure figure of filter shown in Fig. 1
The specific embodiment
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 parts, as Fig. 1, design processing, assembling and the material selection of this filter all meets the requirement of concerned countries standard and industry standard, upper and lower casing connection sealing is good, meet two way seal, compact conformation, processing performance are good.
The material of the upper and lower casing of pure oxygen filter, frame of filter element parts is all selected 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 with it and the medial surface of the technique step 211 of skeleton is close on both sides; The material of sealing gasket 3 is red copper.Tin bronze sintered meshwork is that multiple layer metal is woven to silk screen, by lamination, is suppressed with the technique manufacture such as vacuum-sintering and is formed, and has higher mechanical strength and extraordinary integral rigidity structure.
Frame of filter element is by tin-bronze rod or monel processing and fabricating, and for realizing the all-welded structure of filter element and the working strength of filter core self, as shown in Figure 3, skeleton two ends are being provided with technique step with the place of being welded to connect, tin bronze sintered meshwork two ends.When welding, first tin bronze sintered meshwork is rolled on skeleton, adopts electronics weldering to realize axially closing of tin bronze sintered meshwork and meet welding, tin bronze sintered meshwork and skeleton are fitted tightly.Carry out afterwards the technique step at skeleton two ends and the circumference soldering at tin bronze sintered meshwork two ends.Because electron beam welding is to carry out under vacuum state, the surface quality of weld seam and non-oxidizability are very high, have improved greatly welding performance and the serviceability of filter core, have strengthened weld strength, have extended service life.
The invention provides welding method as follows:
Step 1: respectively frame of filter element, tin bronze sintered meshwork and the frock clamp that matches are with it processed;
Step 2: clean the greasy dirt of removing frame of filter element, tin bronze sintered meshwork and welding tooling chucking surface, prevent from producing bubble in welding process; Acetone soln cleaning workpiece and frock clamp with clean, then dry or dry, after requiring to dry or drying without greasy dirt vestige;
Step 3: first tin bronze sintered meshwork is rolled on skeleton, the medial surface laminating of the technique step at its two ends and skeleton two ends, then frame of filter element, tin bronze sintered meshwork are assembled with welding tooling fixture; During assembling, the abutment joint of frame of filter element, tin bronze sintered meshwork requires to be positioned at the centre of weld jig reserving gaps, and abutment joint is straight, the width maximum of fixture reserving gaps is no more than 3mm, and frame of filter element, tin bronze sintered meshwork will be adjacent to and fix with weld jig;
Step 4: the frame of filter element assembling, tin bronze sintered meshwork clamping are arrived to welding chamber; The weld jig assembling will be fixed in welding chamber, prevents that position is moved when welding;
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) adjust welding parameter: 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) welding: press lower bundle button and rotary handle, lower bundle welding.
(4) require that welding rear surface is smooth, even weld, without solder skip phenomenon.
Step 6: clean and remove welding oxidation tint.
Step 7: do filter cartridge construction integrity test.
Embodiment 1:
Step 1: respectively frame of filter element, tin bronze sintered meshwork and the frock clamp that matches are with it processed;
Step 2: clean the greasy dirt of removing frame of filter element, tin bronze sintered meshwork and welding tooling chucking surface, prevent from producing bubble in welding process; Acetone soln cleaning workpiece and frock clamp with clean, then dry or dry, after requiring to dry or drying without greasy dirt vestige;
Step 3: first tin bronze sintered meshwork is rolled on skeleton, the medial surface laminating of the technique step at its two ends and skeleton two ends, then frame of filter element, tin bronze sintered meshwork are assembled with welding tooling fixture; During assembling, the abutment joint of the frame of filter element of wanting, tin bronze sintered meshwork requires to be positioned at the centre of weld jig reserving gaps, and abutment joint is straight, the width maximum of fixture reserving gaps is no more than 3mm, and frame of filter element, tin bronze sintered meshwork will be adjacent to and fix with weld jig;
Step 4: the frame of filter element assembling, tin bronze sintered meshwork clamping are arrived to welding chamber; The weld jig assembling will be fixed in welding chamber, prevents that position is moved when welding;
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) adjust welding parameter: 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) welding: press lower bundle button and rotary handle, lower bundle welding.
(4) require that welding rear surface is smooth, even weld, without solder skip phenomenon.
Step 6: clean and remove welding oxidation tint.
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 report of the present invention, and filter work system requires filter core to emit bubble point to be greater than 600 Pa.
| Sequence number | The 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 realize the all-welded structure of filter element, because electron beam welding is to carry out under vacuum state, surface quality and non-oxidizability are very high, have improved greatly welding performance and serviceability.And guaranteed 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 has realized effective, the safety filtering to pure oxygen, for oxygen system pressure test provides reliable guarantee, fills up the blank ，Bing Wei of industry company and creates very large benefit.
The above; it is only the preferably specific embodiment of the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; according to technical scheme of the present invention and inventive concept thereof, be equal to replacement or changed, within all should being encompassed in protection scope of the present invention.
Claims (5)
1. space flight pure oxygen filter, comprise upper shell (1), lower house (4), filter core (2) and sealing gasket (3), described filter core comprises frame of filter element (21) and filter element filtering layer (22): it is characterized in that: described filter core (2) is all-welded structure, frame of filter element (21) is comprised of skeleton stack shell and the technique step (211) that is arranged on its two ends, filter element filtering layer (22) adopts tin bronze sintered meshwork, and tin bronze sintered meshwork is rolled in tube of skeleton with it and the medial surface of the technique step (211) of skeleton is close on both sides; Sealing gasket (3) is red copper.
2. space flight pure oxygen filter as claimed in claim 1, is characterized in that: material selection tin bronze or the monel of described upper shell (1), lower house (4), frame of filter element (21).
3. space flight pure oxygen filter as claimed in claim 1 or 2, is characterized in that: described tin bronze sintered meshwork is to suppress the multiple layer metal weaving silk screen with vacuum-sintering by lamination.
4. the welding method of space flight pure oxygen filter as claimed in claim 1, comprises the steps:
Step 1: adopt tin-bronze rod processing and fabricating frame of filter element, at frame of filter element two ends, technique step is set;
Step 2: tin bronze sintered meshwork is rolled in to tube of skeleton with it and the technique step of skeleton is close on both sides;
Step 3: adopt electro-beam welding method to carry out axial joint close welding and the two ends circumference soldering of tin bronze sintered meshwork and skeleton.
5. the welding method of space flight pure oxygen filter as claimed in claim 3, comprises the steps:
Step 1: respectively frame of filter element, tin bronze sintered meshwork and the frock clamp that matches are with it processed;
Step 2: clean the greasy dirt of removing frame of filter element, tin bronze sintered meshwork and welding tooling chucking surface with clean acetone soln, then dry or dry;
Step 3: tin bronze sintered meshwork is rolled on frame of filter element, frame of filter element, tin bronze sintered meshwork are assembled with welding tooling fixture; During assembling, the abutment joint of the welding work pieces of requires to be positioned at the centre of weld jig reserving gaps, and abutment joint is straight, and the width maximum of fixture reserving gaps is no more than 3mm, and frame of filter element, tin bronze sintered meshwork will be adjacent to and fix with weld jig;
Step 4: the frame of filter element assembling and tin bronze sintered meshwork clamping are arrived to welding chamber;
Step 5: the workpiece that soldering group installs;
(1) shut welding booth's door and vacuumize:
(2) adjust 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) welding: press lower bundle button and rotary handle, lower bundle welding;
Step 6: clean and remove welding oxidation tint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| 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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| CN103566656A true CN103566656A (en) | 2014-02-12 |
| CN103566656B CN103566656B (en) | 2015-09-23 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105854426A (en) * | 2016-05-13 | 2016-08-17 | 新乡市天诚航空净化设备有限公司 | Inert dust collector |
| CN107875707A (en) * | 2017-12-21 | 2018-04-06 | 新乡市天诚航空净化设备有限公司 | A kind of tank fluid path filter element and its welding method |
| CN108788358A (en) * | 2018-08-27 | 2018-11-13 | 新乡市滤清器有限公司 | A kind of soldering filter core and welding procedure |
| CN109128542A (en) * | 2018-10-09 | 2019-01-04 | 华北水利水电大学 | A kind of method of laser spot welding and vacuum brazing composite welding stainless steel seawater filter core |
| CN110497072A (en) * | 2019-09-27 | 2019-11-26 | 福州大学 | Metal-rubber based on vacuum electron beam welding damps battenboard preparation process |
| 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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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105854426A (en) * | 2016-05-13 | 2016-08-17 | 新乡市天诚航空净化设备有限公司 | Inert dust collector |
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| CN107875707A (en) * | 2017-12-21 | 2018-04-06 | 新乡市天诚航空净化设备有限公司 | A kind of tank fluid path filter element and its welding method |
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| CN108788358A (en) * | 2018-08-27 | 2018-11-13 | 新乡市滤清器有限公司 | A kind of soldering filter core and welding procedure |
| CN108788358B (en) * | 2018-08-27 | 2020-11-03 | 新乡市滤清器有限公司 | Brazing filter element and welding process |
| CN109128542A (en) * | 2018-10-09 | 2019-01-04 | 华北水利水电大学 | A kind of method of laser spot welding and vacuum brazing composite welding stainless steel seawater filter core |
| CN110497072A (en) * | 2019-09-27 | 2019-11-26 | 福州大学 | Metal-rubber based on vacuum electron beam welding damps battenboard preparation process |
| 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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