CN109366106A - A kind of big volume titanium alloy cylinder, manufacturing method and its application suitable for liquid oxygen environment - Google Patents
A kind of big volume titanium alloy cylinder, manufacturing method and its application suitable for liquid oxygen environment Download PDFInfo
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- CN109366106A CN109366106A CN201811436408.8A CN201811436408A CN109366106A CN 109366106 A CN109366106 A CN 109366106A CN 201811436408 A CN201811436408 A CN 201811436408A CN 109366106 A CN109366106 A CN 109366106A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/32—Selection of soldering or welding materials proper with the principal constituent melting at more than 1550 degrees C
- B23K35/325—Ti as the principal constituent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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Abstract
A kind of big volume titanium alloy cylinder, manufacturing method and its application suitable for liquid oxygen environment, the big volume titanium alloy cylinder includes gas cylinder bottle body, pipe fitting, sealing structure；The position that gas cylinder bottle body is connected with pipe fitting is threaded, and is connected through a screw thread simultaneously pressing sealing structure；The cylinder material selects the metal material compatible with liquid oxygen environment, and pipe fitting uses austenitic stainless steel or high temperature alloy；It is described compatible physical-chemical reaction to occur for cylinder material and inside and outside media contact.Gas cylinder of the present invention reliably working in liquid oxygen environment, and single air cylinder volume is big, can reduce gas cylinder and fixed device quantity, reduce load.
Description
Technical field
The present invention relates to big volume (generally higher than 100L) high pressure titanium alloy ball-types that one kind can use in liquid oxygen environment
Gas cylinder can be propellant tank high-efficient pressurizing during carrier rocket flight.
Background technique
Gas cylinder pressurization is the important way that liquid launch vehicle pressurizing transmission system is propellant tank pressurization.Gas cylinder pressurization
Principle be to store the gas of certain pressure and volume before penetrating in advance in gas cylinder, pass through timing control opening in rocket flight
High pressure gas in gas cylinder is discharged into tank by the isolating device that gas cylinder is connected with tank.In order to further increase gas cylinder storage
Gas efficiency is often immersed in gas cylinder in propellant in the carrier rocket using cryogenic propellant.Such as: use liquid hydrogen
Carrier rocket of the liquid oxygen as propellant, gas cylinder is placed in the LOX tank of 90K low temperature, according to ideal gas behavior side
Journey can be substantially improved high pressure gas cylinder air storage amount, and then reduce gas cylinder usage quantity, reduce load, promote rocket carrying capacity.
High pressure gas cylinder is placed in liquid hydrogen tank by the existing cryogenic propellant carrier rocket in China, and gas cylinder is placed in liquid hydrogen submergence
In.The standard specification of the gas cylinder is 20L simultaneously, thinks to need more pressurization gas if passing through and calculating, increase accordingly gas cylinder
Quantity.The cylinder design manufacturing technology have been relatively mature at present.However, being set in the metal cylinder being immersed in liquid oxygen propellant
Meter and manufacturing technology field then always exist blank.
Summary of the invention
Technology of the invention solves the problems, such as: overcoming the deficiencies of the prior art and provide one kind can use in liquid oxygen environment
Big capacity high pressure titanium alloy ball-type gas cylinder and its manufacturing method, gas cylinder is mounted in liquid launch vehicle LOX tank, in liquid
Reliably working in oxygen environment, and single air cylinder volume is big, can reduce gas cylinder and fixed device quantity, reduce load.
The technical solution of the invention is as follows: a kind of big volume titanium alloy cylinder suitable for liquid oxygen environment, including gas cylinder
Bottle body, pipe fitting, sealing structure；
The position that gas cylinder bottle body is connected with pipe fitting is threaded, and is connected through a screw thread simultaneously pressing sealing structure；It is above-mentioned
The volume of gas cylinder is greater than 100L；The gas cylinder bottle body material selection metal material compatible with liquid oxygen environment, pipe fitting use
Austenitic stainless steel or high temperature alloy；It is described that compatible for cylinder material physical chemistry will not to occur with inside and outside media contact anti-
It answers.
Preferably, the gas cylinder bottle body material is the titanium alloy of annealed state.
Preferably, the titanium alloy is TC4ELI or TA7ELI.
Preferably, the sealing structure is designed using two pass redundant seal, and the road Ji Nei is general plug seal, and outer course is copper
Or aluminium washer.
A kind of manufacturing method of the big volume gas cylinder suitable for liquid oxygen environment, it is characterised in that be accomplished in the following manner:
The first step selects a kind of theoretically sheet metal material compatible with liquid oxygen environment；
Second step welds selected sheet metal material using the welding procedure of selection；To selected sheet of metallic material
Material and welded seam area carry out the test of material liquid oxygen long period of soaking, liquid oxygen environment mechanical shock test, oxygen washout test, if described
Plate and welded seam area are tested by above three, then verify material and welding procedure is feasible, turn third step, otherwise more take a breath
Bottle material or welding procedure, restart to verify；
Third step determines gas cylinder moulding process:
Gas cylinder hemisphere is formed in the way of superplastic formation, and machine adds the connecting portion of gas cylinder bottle body and pipe fitting out；
Two hemisphere form whole ball by welding manner, and install pipe fitting and sealing structure, obtain gas cylinder；
Above-mentioned gas cylinder is carried out the test of material liquid oxygen long period of soaking, the test of low temperature inflation/deflation, pressures cycle examination by the 4th step
It tests, low temperature explosion bulge test, if gas cylinder, by aforementioned four test, the whole bottle of gas cylinder turns the 5th step by examination；Otherwise, it replaces
Gas cylinder material or moulding process, are verified since second step；
5th step, batch production gas cylinder, and batch test is carried out, batch test mesh all passes through then this batch gas
Bottle can be used as final qualified products and be delivered for use.
Preferably, liquid oxygen long period of soaking test specifically: product to be tested is immersed in liquid oxygen, is impregnated at least
For 24 hours, it then takes out and restores room temperature and dry up, check whether surface state generates color or tissue change, judges if unchanged
Whether test products weight changes, and completes 1 circulation, so circulation at least 5 times；As every time circulation rear surface state, to
Test products weight does not change, then assert that test products are tested by liquid oxygen long period of soaking；Otherwise do not pass through the test；
Preferably, the liquid oxygen environment mechanical shock test specifically: by product to be tested as in liquid oxygen environment, lead to
It crosses percussion hammer to be released from by falling impacts product to be tested, judges whether sensitivity phenomenon occurs under at least 98J energy impact, if hair
It is raw, then not by the test, otherwise it is assumed that passing through the test.
Preferably, the sensitivity phenomenon includes scintillation, burning, explosion sound, test piece or hits phenomena such as column is burnt.
Preferably, the oxygen washout test includes the gentle oxygen washout test of liquid oxygen washout test；Wherein, liquid oxygen washes away examination
In testing: at least flow velocity of 1.6m/s, tangential, normal direction washes away at least 10min to liquid oxygen；In gas oxygen washout test: gas oxygen is at least
The flow velocity of 1.6m/s is tangential, normal direction washes away at least 10min.
Preferably, gas cylinder is soaked in liquid nitrogen in the 4th step, after temperature is down to liquid nitrogen temperature completely, carries out charge and discharge
Gas test.
Preferably, the pressure cycling test in the 4th step carries out Pressure of Ambient Temperature first using pure water as test(ing) medium
Cyclic test, compression rate is not higher than 1MPa/min during test；Low-temperature pressure cyclic test is carried out later, and gas cylinder is soaked in
In liquid nitrogen, and liquid nitrogen is filled into bottle, after temperature complete equipilibrium, helium pressurization to the cold, pressurization speed through liquid nitrogen are filled with into bottle
Rate is not higher than 1MPa/min.
Preferably, solid fraction particulate matter is filled in gas cylinder, fills helium to 10MPa under room temperature, gas cylinder is then soaked in liquid nitrogen
In, after temperature complete equipilibrium, it is filled with the helium pressurization to the cold through liquid nitrogen into bottle, is pressurized to 32MPa, pressure maintaining 10min first, protects
Storage pressure should be not less than 31MPa during pressure, continue to be pressurized to 47MPa after pressure maintaining, pressure maintaining 30s, gas cylinder is not broken during this period
It is bad, then it is assumed that explosion bulge test is qualified；Continue to be pressurized to 50MPa, gas cylinder does not destroy yet, and pressure release terminates to test.
Preferably, the batch test includes room temperature hydraulic test, acoustic emission inspection, residual deformation measurement, room temperature
Air seal test, fatigue test, sampling observation room temperature explosion bulge test, low temperature intensity test, sampling observation one of low temperature explosion bulge test or
It is a variety of.
The gas cylinder is applied to heavy launcher.
The present invention has the beneficial effect that compared with prior art
(1), a kind of metal cylinder design and manufacturer suitable for carrier rocket liquid oxygen environment of innovative design of the present invention
Method.By carrying out the test such as liquid oxygen long period of soaking, mechanical shock, determine using titanium alloy material as gas cylinder raw material.The material
The high-pressure metal gas cylinder and liquid oxygen for expecting production have good compatibility, can be used in carrier rocket LOX tank environment,
General layout Plan range of choice is expanded.
(2), the big volume titanium alloy spherical metal gas cylinder that the present invention designs also has multinomial using advantage, including volume
The more existing 20L gas cylinder of 130L dramatically increases, and titanium alloy material specific strength is high, and spherical structure form structure is high-efficient etc..These are excellent
Gesture can more efficiently reduce the present invention by load on the launch vehicle, improve delivery efficiency.
Detailed description of the invention
Fig. 1,2 are gas cylinder structural schematic diagram of the present invention；
Fig. 3 is sealed structural schematic diagram of the present invention.
Specific embodiment
With reference to the accompanying drawing and example elaborates to the present invention.
As shown in Figure 1, 2, a kind of big volume titanium alloy cylinder suitable for liquid oxygen environment, including gas cylinder bottle body 1, pipe fitting
2, sealing structure 3；
The position that gas cylinder bottle body is connected with pipe fitting is threaded, and is connected through a screw thread simultaneously pressing sealing structure；It is described
The gas cylinder bottle body material selection metal material compatible with liquid oxygen environment, pipe fitting uses austenitic stainless steel or high temperature alloy；
It is described compatible physical-chemical reaction to occur for cylinder material and inside and outside media contact.
The structure type of carrier rocket high pressure gas cylinder can be designed as the symmetrical structures such as cylindricality, spherical shape and annular, and ball
The structure efficiency (product of the pressure and volume of gas cylinder internal gas under unit mass) of shape gas cylinder is maximum, to reduce gas cylinder weight,
Big volume low-temperature metal gas cylinder in the present invention uses spherical structure scheme.Gas cylinder is welded by two hemisphere 11, bottle body knot
Structure is as shown in Figure 1.The welding of two hemisphere uses electron beam welding, and 12 be weld seam, and stress relief annealing is carried out after the completion of welding.Gas cylinder
Hemisphere materials'use titanium alloy, material are annealed state, and gas cylinder hemisphere is obtained by die forging or hot-forming mode, and pipe connects
Head is obtained using austenitic stainless steel or high temperature alloy by machining form.
In addition, using gas cylinder quantity to reduce rocket, gas cylinder and fixed device quantity are reduced, reduces rocket general assembly work
It measures, single air cylinder volume is designed as 130L in this example.
It is as described in Figure 3 the big volume metal cylinder sealed structural schematic diagram of the present invention.Sealing structure of the present invention is by red copper pad
Circle, retaining ring, general match sealing element and pipe fitting and gas cylinder ozzle provide pretightning force by screw thread and are sealed.It can to improve sealing
By property, sealing position is double sealing, wherein being sealed into metal sealing together, another road sealing uses general plug seal, thus
Improve integral sealing reliability.
The material of metal seal generally selects soft metal, such as fine aluminium (L4), fine copper (T2, T3).According to working condition,
Copper and liquid oxygen, liquid hydrogen all have excellent compatibility, there is application experience, and the hardness of annealed copper in liquid hydrogen, liquid oxygen
Lower (slightly above soft aluminium), it is smaller to the damage of air bottle nozzle sealing surface by the way of screwing installation, therefore select copper T2 as
Metal seal material.The seal form of general plug sealing is radial seal, and sealing ring is installed in groove, and sealing lip is compressed,
This deformation is offset by spring force, while sealing lip is pressed on hardware surface by spring force.Spring force and sealing lip and hardware
The contact on surface provides sealing effect, after system pressure is established, generates additional force and acts on sealing lip.System pressure and spring
Pressure provides sealing jointly.
Requirement in terms of low-temperature metal gas cylinder selection specifically includes that specific strength value is high, has high-intensity performance, in liquid oxygen work
Make there is no brittle transition temperature area, excellent weather-resistant in area, all there is stabilization to the various media that may be used
Media compatibility, at normal temperature have good processing performance and certain mechanical performance.
It is available following by titanium alloy material liquid oxygen long period of soaking, cyclic test for the consistency problem of liquid oxygen
Conclusion: 1) after titanium alloy sample impregnates in liquid oxygen, appearance and quality have no significant change；2) titanium alloy sample under liquid oxygen environment
It is impacted under specified mechanical shock energy, no-spark, detonation, explosion, phenomena such as burning.Titanium alloy material can be judged accordingly
It is insensitive to mechanical shock under liquid oxygen environment.Pipe fitting materials'use austenitic stainless steel or high temperature alloy, sealing ring material
Use red copper or fine aluminium.
Gas cylinder manufacture is divided into four steps:
The first step selects a kind of theoretically sheet metal material compatible with liquid oxygen environment.
Metal material need to carry out the test of liquid oxygen long period of soaking, liquid oxygen environment mechanical shock test, oxygen washout test, if material
It is tested by above three, then it is assumed that material can be used for producing big volume metal cylinder.
Test one, the test of liquid oxygen long period of soaking:
The liquid level of test liquid oxygen is higher by product top surface (10~15) mm to be tested, to ensure that product to be tested is complete always
It is immersed in liquid oxygen.It impregnates for 24 hours, then takes out and restore room temperature and dry up, check whether surface state, product weight to be tested are sent out
Changing completes 1 circulation, so circulation 5 times.Such as recycle 5 rear surface states, product weight to be tested does not change, then
Assert that product to be tested is tested by liquid oxygen long period of soaking；Otherwise do not pass through the test.
Test two, liquid oxygen environment mechanical shock test:
It is carried out in normal pressure liquid oxygen mechanical shock test equipment.Testing equipment by guide rail, steel hammer, electromagnet, hit column, impact
Cup, anvil and pedestal composition, are mounted in the explosion-proof cell with observation window and shading.Before test, column, impact cup, examination will be first hit
Piece etc. cleans up, and is then pre-chilled with liquid oxygen；When test, test piece is placed on impact cup bottom and is pressed and hits column, after filling it up with liquid oxygen,
Impact cup is placed in anvil slot again, the steel percussion hammer of certain mass is freely dropped into from a certain height and is hit on column, with occur scintillation,
Phenomena such as column is burnt, the judgment basis as shock-sensitive are hit in burning, explosion sound, test piece.See whether that generation catches fire, is quick-fried
Phenomena such as fried.
Normal pressure liquid oxygen mechanical shock test judgment criteria: (1) 98J impact energy under the conditions of, a kind of material continuous 20
Sample carries out impact test, does not react, that is, passes through lot inspection；Otherwise, continue 20 sample impact tests, there is 1
It is a to react, it can stop testing, lot inspection does not pass through；(2) under the conditions of 98J impact energy, a kind of material continuous 60
Sample carries out impact test, and not more than 1 reacts, that is, passes through lot inspection；There are 2 to react, can stop testing, batch
Secondary inspection does not pass through.
Test three, oxygen washout test:
Using low-temperature liquid oxygen, gas oxygen not carry out liquid oxygen and gas oxygen washout test, liquid oxygen 1.6m/s, 88K, 1.6m/s flow velocity
Tangentially, normal direction washes away 10min, and gas oxygen 1.6m/s, 140K, 1.6m/s flow velocity are tangential, normal direction washes away 10min.Observe sample whether there is or not
Phenomena such as reaction, blackening.
Because metal cylinder contains weld seam, weld metal zone material structure is different from material body, should also carry out liquid for weld metal zone
The test of oxygen long period of soaking, liquid oxygen environment mechanical shock test, oxygen washout test.If material body and welding region pass through the first step
Three tests, then verify material body and welding procedure be feasible, turn second step；Otherwise, gas cylinder material or welding procedure are replaced,
Restart to verify.
Second step determines gas cylinder moulding process.
Gas cylinder hemisphere is formed in the way of superplastic formation, and machine adds the connecting portion of gas cylinder bottle body and pipe fitting out；Two
Hemisphere forms whole ball by welding manner, installs pipe fitting and sealing structure, obtains gas cylinder.
Third step, whole bottle test.
It includes: whole bottle liquid oxygen infusion test, the test of low temperature inflation/deflation, pressure that whole bottle need to carry out four test tests altogether
Cyclic test, low temperature explosion bulge test, it is therefore an objective to examine whether material satisfies the use demand with moulding process.
Test one, whole bottle liquid oxygen infusion test:
The gas cylinder that second step is obtained immerses liquid oxygen and carries out circulation immersion test, and it is normal to then take out recovery by soaking time 48h
Temperature is simultaneously dried, and checks whether surface state, gas cylinder weight change.It is equal such as to test rear surface state, product weight to be tested
Do not change, then assert that product to be tested is tested by liquid oxygen long period of soaking；Otherwise do not pass through the test.
Test two, the test of low temperature inflation/deflation:
Gas cylinder is soaked in liquid nitrogen, after temperature is down to liquid nitrogen temperature completely, carries out inflation/deflation test.Test process every time
In, pressure maintaining is after equalized temperature after the completion of inflation, then carries out gassing experiment.Record pressure of the inside of a bottle, temperature during above-mentioned test
Spend gentle bottle wall surface temperature, helium is filled with the variation of temperature, charge and discharge throughput before ozzle before gas cylinder, equal during inflation/deflation test
It carries out acoustic emission monitor(ing) and keeps a record.
Test three, pressure cycling test:
Use the gas cylinder for completing the test of low temperature inflation/deflation, first the progress hydraulic 100 room temperature pressures of 0MPa~15MPa~0MPa
Power cyclic test, test(ing) medium are pure water, and compression rate is not higher than 1MPa/min, the pressure maintaining 30s at 15MPa.It carries out later
Low-temperature pressure cyclic test, gas cylinder are soaked in liquid nitrogen, and liquid nitrogen is filled into bottle, after temperature complete equipilibrium, are filled with into bottle
Helium pressurization through liquid nitrogen to the cold, and 0MPa~23MPa~0MPa22 low-temperature pressure cyclic test is carried out, compression rate is not high
In 1MPa/min, the pressure maintaining 30s at 23MPa.It is both needed to carry out acoustic emission monitor(ing) during test and keep a record.
Test four, low temperature explosion bulge test:
The explosion bulge test of liquid nitrogen temperature low temperature is carried out using the gas cylinder for completing pressure cycling test.Millet is filled in gas cylinder, often
Helium is filled under temperature to 10MPa.Then gas cylinder is soaked in liquid nitrogen, after temperature complete equipilibrium, is filled with into bottle through liquid nitrogen to the cold
Helium pressurization, there are three test pressure requirements, are slowly pressurized to 32MPa, and pressure maintaining 10min, storage pressure is answered in pressure maintaining period
Not less than 31MPa, continue to be pressurized to 47MPa after pressure maintaining, pressure maintaining 30s, gas cylinder does not destroy during this period, then it is assumed that explosion bulge test is closed
Lattice.Continue to be pressurized to 50MPa, gas cylinder does not destroy yet, allows pressure release, terminates test.
Third step, four tests all pass through, then the whole bottle of gas cylinder turns the 4th step by examination；Otherwise, gas cylinder material is replaced
Or moulding process, restart to verify.
4th step, retrieves gas cylinder, general batch production, and carries out batch test, and batch test includes: normal
Warm hydraulic test, residual deformation measurement, room temperature air seal test, fatigue test, inspects room temperature explosion bulge test by random samples, is low acoustic emission inspection
Warm strength test, sampling observation low temperature explosion bulge test.Batch test mesh all passes through, this batch gas cylinder can be used as final qualified production
Product are delivered for use.
Unspecified part of the present invention belongs to common sense well known to those skilled in the art.
Claims (14)
1. a kind of big volume titanium alloy cylinder suitable for liquid oxygen environment, it is characterised in that: including gas cylinder bottle body, pipe fitting, close
Seal structure；
The position that gas cylinder bottle body is connected with pipe fitting is threaded, and is connected through a screw thread simultaneously pressing sealing structure；It is above-mentioned；It is described
The gas cylinder bottle body material selection metal material compatible with liquid oxygen environment, pipe fitting uses austenitic stainless steel or high temperature alloy；
It is described compatible physical-chemical reaction to occur for cylinder material and inside and outside media contact.
2. gas cylinder according to claim 1, it is characterised in that: the gas cylinder bottle body material is the titanium alloy of annealed state.
3. gas cylinder according to claim 2, it is characterised in that: the titanium alloy is TC4ELI or TA7ELI.
4. gas cylinder according to claim 1, it is characterised in that: the sealing structure is designed using two pass redundant seal,
The road Ji Nei is general plug seal, and outer course is copper or aluminium washer.
5. the manufacturing method of gas cylinder described in claim 1, it is characterised in that be accomplished in the following manner:
The first step selects a kind of theoretically sheet metal material compatible with liquid oxygen environment；
Second step welds selected sheet metal material using the welding procedure of selection；To selected sheet metal material with
And welded seam area carries out the test of material liquid oxygen long period of soaking, liquid oxygen environment mechanical shock test, oxygen washout test, if the plate
And welded seam area is tested by above three, then verifies material and welding procedure is feasible, turn third step, otherwise replaces gas cylinder material
Matter or welding procedure restart to verify；
Third step determines gas cylinder moulding process:
Gas cylinder hemisphere is formed in the way of superplastic formation, and machine adds the connecting portion of gas cylinder bottle body and pipe fitting out；
Two hemisphere form whole ball by welding manner, and install pipe fitting and sealing structure, obtain gas cylinder；
Above-mentioned gas cylinder is carried out the material liquid oxygen long period of soaking test, test of low temperature inflation/deflation, pressure cycling test, low by the 4th step
Warm explosion bulge test, if gas cylinder, by aforementioned four test, the whole bottle of gas cylinder turns the 5th step by examination；Otherwise, gas cylinder material is replaced
Matter or moulding process, are verified since second step；
5th step, batch production gas cylinder, and carry out batch test, batch test mesh all pass through then that this batch gas cylinder can
It is delivered for use as final qualified products.
6. according to the method described in claim 5, it is characterized by: the liquid oxygen long period of soaking is tested specifically: will be wait try
It tests product to immerse in liquid oxygen, impregnate at least for 24 hours, then take out and restore room temperature and dry up, check whether surface state generates color
Or tissue change, if unchanged judge whether test products weight changes, complete 1 circulation, so circulation at least 5
It is secondary；If circulation rear surface state, product weight to be tested do not change every time, then assert that test products pass through liquid oxygen long period of soaking
Test；Otherwise do not pass through the test.
7. according to the method described in claim 5, it is characterized by: the liquid oxygen environment mechanical shock test specifically: will
Product to be tested is released from by percussion hammer by falling impacts product to be tested, judgement at least 98J energy rushes as in liquid oxygen environment
It hits down and whether sensitivity phenomenon occurs, if occurring, not by the test, otherwise it is assumed that passing through the test.
8. according to the method described in claim 7, it is characterized by: the sensitivity phenomenon includes scintillation, burning, explosion sound
Phenomena such as column is burnt is hit in sound, test piece.
9. according to the method described in claim 5, it is characterized by: the oxygen washout test includes that liquid oxygen washout test is gentle
Oxygen washout test；Wherein, in liquid oxygen washout test: at least flow velocity of 1.6m/s, tangential, normal direction washes away at least 10min to liquid oxygen；
In gas oxygen washout test: at least flow velocity of 1.6m/s, tangential, normal direction washes away at least 10min to gas oxygen.
10. according to the method described in claim 5, it is characterized by: gas cylinder is soaked in liquid nitrogen in the 4th step, temperature
After being down to liquid nitrogen temperature completely, inflation/deflation test is carried out.
11. according to the method described in claim 5, it is characterized by: the pressure cycling test in the 4th step is first with pure
Water purification is test(ing) medium, carries out Pressure of Ambient Temperature cyclic test, and compression rate is not higher than 1MPa/min during test；It carries out later
Low-temperature pressure cyclic test, gas cylinder are soaked in liquid nitrogen, and liquid nitrogen is filled into bottle, after temperature complete equipilibrium, are filled with into bottle
Helium pressurization through liquid nitrogen to the cold, compression rate are not higher than 1MPa/min.
12. according to the method described in claim 5, it is characterized by: the low temperature explosion bulge test specifically: filling in gas cylinder
Solid fraction particulate matter fills helium to 10MPa under room temperature, then gas cylinder is soaked in liquid nitrogen, after temperature complete equipilibrium, is filled into bottle
Enter the helium pressurization to the cold through liquid nitrogen, be pressurized to 32MPa first, pressure maintaining 10min, storage pressure should be not less than in pressure maintaining period
31MPa continues to be pressurized to 47MPa after pressure maintaining, and pressure maintaining 30s, gas cylinder does not destroy during this period, then it is assumed that explosion bulge test is qualified；After
Continuous to be pressurized to 50MPa, gas cylinder does not destroy yet, and pressure release terminates to test.
13. according to the method described in claim 5, it is characterized by: the batch test includes room temperature hydraulic test, sound
Emit inspection, residual deformation measurement, room temperature air seal test, fatigue test, sampling observation room temperature explosion bulge test, low temperature intensity test, take out
Examine one or more of low temperature explosion bulge test.
14. gas cylinder described in one of claim 1-13 is applied to heavy launcher.
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| CN201811436408.8A CN109366106B (en) | 2018-11-28 | 2018-11-28 | Large-volume titanium alloy gas cylinder suitable for liquid oxygen environment, manufacturing method and application thereof |
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| CN201811436408.8A CN109366106B (en) | 2018-11-28 | 2018-11-28 | Large-volume titanium alloy gas cylinder suitable for liquid oxygen environment, manufacturing method and application thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111928104A (en) * | 2020-10-09 | 2020-11-13 | 北京星际荣耀空间科技有限公司 | Liquid oxymethane rocket supercharging device and liquid oxymethane rocket |
| CN111929231A (en) * | 2020-08-20 | 2020-11-13 | 江苏君澄空间科技有限公司 | Liquid oxygen compatibility testing arrangement |
| CN112066240A (en) * | 2020-08-04 | 2020-12-11 | 上海航天精密机械研究所 | High-pressure low-temperature composite material gas cylinder used in liquid oxygen environment and manufacturing method |
| CN113414556A (en) * | 2021-07-23 | 2021-09-21 | 兰州空间技术物理研究所 | Metal composite air port for satellite pressure container and manufacturing method thereof |
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| CN111928104B (en) * | 2020-10-09 | 2020-12-22 | 北京星际荣耀空间科技有限公司 | Liquid oxymethane rocket supercharging device and liquid oxymethane rocket |
| CN113414556A (en) * | 2021-07-23 | 2021-09-21 | 兰州空间技术物理研究所 | Metal composite air port for satellite pressure container and manufacturing method thereof |
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