CN109366106B - Large-volume titanium alloy gas cylinder suitable for liquid oxygen environment, manufacturing method and application thereof - Google Patents
Large-volume titanium alloy gas cylinder suitable for liquid oxygen environment, manufacturing method and application thereof Download PDFInfo
- Publication number
- CN109366106B CN109366106B CN201811436408.8A CN201811436408A CN109366106B CN 109366106 B CN109366106 B CN 109366106B CN 201811436408 A CN201811436408 A CN 201811436408A CN 109366106 B CN109366106 B CN 109366106B
- Authority
- CN
- China
- Prior art keywords
- test
- gas cylinder
- temperature
- liquid oxygen
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
A large-volume titanium alloy gas cylinder suitable for a liquid oxygen environment, a manufacturing method and application thereof are disclosed, wherein the large-volume titanium alloy gas cylinder comprises a gas cylinder body, a pipe joint and a sealing structure; threads are processed at the connecting part of the gas cylinder body and the pipe joint, and the sealing structure is connected and pressed through the threads; the gas cylinder is made of a metal material compatible with a liquid oxygen environment, and the pipe joint is made of austenitic stainless steel or high-temperature alloy; the compatibility is that the gas cylinder material does not generate physical and chemical reaction when contacting with the internal and external media. The gas cylinder provided by the invention can reliably work in a liquid oxygen environment, and the volume of a single gas cylinder is large, so that the number of gas cylinders and fixing devices can be reduced, and the load is reduced.
Description
Technical Field
The invention relates to a large-volume (generally more than 100L) high-pressure titanium alloy spherical gas cylinder which can be used in a liquid oxygen environment and can efficiently pressurize a propellant storage tank in the process of carrier rocket flight.
Background
Gas cylinder pressurization is an important way for pressurizing a propellant tank by a liquid carrier rocket pressurization conveying system. The principle of gas cylinder pressurization is that gas with certain pressure and volume is stored in a gas cylinder in advance before shooting, and when a rocket flies, an isolating device connected with the gas cylinder and a storage box is opened through time sequence control, so that high-pressure gas in the gas cylinder is released into the storage box. In order to further improve the gas storage efficiency of the gas cylinder, in a carrier rocket using a low temperature propellant, the gas cylinder is often immersed in the propellant. For example: the carrier rocket using liquid hydrogen and liquid oxygen as propellants places the gas cylinder in a liquid oxygen storage tank at a low temperature of 90K, and can greatly improve the gas storage capacity of the high-pressure gas cylinder according to an ideal gas state equation, so that the use number of the gas cylinders is reduced, the load is reduced, and the carrying capacity of the rocket is improved.
The existing low-temperature propellant carrier rocket in China arranges a high-pressure gas cylinder in a liquid hydrogen storage tank, and the gas cylinder is arranged in the liquid hydrogen immersion. Meanwhile, the standard specification of the gas cylinder is 20L, and if more pressurized gas is needed through calculation, the number of the gas cylinders is correspondingly increased. The design and manufacture technology of the gas cylinder is mature at present. However, there is a constant gap in the art of metal cylinder design and manufacture immersed in liquid oxygen propellants.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the large-volume high-pressure titanium alloy spherical gas cylinder can be used in a liquid oxygen environment, is arranged in a liquid oxygen storage tank of a liquid carrier rocket and reliably works in the liquid oxygen environment, and the single gas cylinder has large volume, so that the number of the gas cylinders and fixing devices can be reduced, and the load is reduced.
The technical solution of the invention is as follows: a large-volume titanium alloy gas cylinder suitable for a liquid oxygen environment comprises a gas cylinder body, a pipe joint and a sealing structure;
threads are processed at the connecting part of the gas cylinder body and the pipe joint, and the sealing structure is connected and pressed through the threads; the volume of the gas cylinder is more than 100L; the gas cylinder body is made of a metal material compatible with a liquid oxygen environment, and the pipe joint is made of austenitic stainless steel or high-temperature alloy; the compatibility is that the gas cylinder material does not generate physical and chemical reaction when contacting with the internal and external media.
Preferably, the material of the gas cylinder body is titanium alloy in an annealed state.
Preferably, the titanium alloy is TC4ELI or TA7 ELI.
Preferably, the sealing structure adopts a double-channel redundant sealing design, namely an inner channel is a flooding plug sealing element, and an outer channel is a copper or aluminum gasket.
A method for manufacturing a large-volume gas cylinder suitable for a liquid oxygen environment is characterized by comprising the following steps:
firstly, selecting a metal material plate which is theoretically compatible with a liquid oxygen environment;
secondly, welding the selected metal material plate by using the selected welding process; carrying out a material liquid oxygen long-term immersion test, a liquid oxygen environment mechanical impact test and an oxygen scouring test on the selected metal material plate and the welding seam area, if the plate and the welding seam area pass the three tests, verifying that the material and the welding process are feasible, turning to the third step, otherwise, replacing the material of the gas cylinder or the welding process, and restarting verification;
thirdly, determining a gas cylinder forming process:
forming a gas cylinder hemisphere by using a superplastic forming mode, and machining a connecting part of a gas cylinder body and a pipe joint;
forming a whole ball by welding the two hemispheres, and mounting a pipe joint and a sealing structure to obtain the gas cylinder;
fourthly, performing a material liquid oxygen long-term soaking test, a low-temperature gas charging and discharging test, a pressure cycle test and a low-temperature explosion test on the gas cylinder, if the gas cylinder passes the four tests, checking the whole gas cylinder, and turning to the fifth step; otherwise, replacing the material of the gas cylinder or the forming process, and verifying from the second step;
and fifthly, producing the gas cylinders in batches, and performing batch tests, wherein the batch gas cylinders can be delivered as final qualified products if all the batch tests pass.
Preferably, the liquid oxygen long-term immersion test specifically comprises: immersing a product to be tested in liquid oxygen, immersing for at least 24h, taking out, recovering to normal temperature, drying, checking whether the surface state generates color or tissue change, judging whether the weight of the test product changes if the surface state does not change, completing 1 cycle, and repeating for at least 5 times; if the surface state and the weight of the product to be tested are not changed after each circulation, the test product is determined to pass the liquid oxygen long-term soaking test; otherwise, the test is failed;
preferably, the liquid oxygen environment mechanical impact test specifically comprises: and (3) placing the product to be tested in a liquid oxygen environment, releasing free fall through a ram to impact the product to be tested, judging whether the sensitivity phenomenon occurs under the impact of at least 98J energy, if so, failing to pass the test, otherwise, considering that the test is passed.
Preferably, the sensitive phenomena include the phenomena of fire striking, burning, explosion noise, burning of test pieces or columns, and the like.
Preferably, the oxygen scouring test comprises a liquid oxygen scouring test and a gas oxygen scouring test; wherein, in the liquid oxygen scouring test: flushing liquid oxygen at a flow rate of at least 1.6m/s tangentially and normally for at least 10 min; in the oxygen scouring test: the gas oxygen is flushed tangentially and normally for at least 10min at a flow rate of at least 1.6 m/s.
Preferably, in the fourth step, the gas cylinder is soaked in liquid nitrogen, and after the temperature is completely reduced to the liquid nitrogen temperature, a gas charging and discharging test is carried out.
Preferably, in the pressure cycle test in the fourth step, purified water is used as a test medium to perform a normal-temperature pressure cycle test, and the pressurizing rate is not higher than 1MPa/min in the test process; and then, carrying out a low-temperature pressure cycle test, soaking the gas cylinder in liquid nitrogen, filling the liquid nitrogen into the gas cylinder, filling helium which is cooled by the liquid nitrogen into the gas cylinder after the temperature is completely balanced, and pressurizing at the pressurizing rate of not higher than 1 MPa/min.
Preferably, solid particles are filled in the gas cylinder, helium gas is filled to 10MPa at normal temperature, then the gas cylinder is soaked in liquid nitrogen, after the temperature is completely balanced, the helium gas which is cooled by the liquid nitrogen is filled in the gas cylinder for pressurization, the pressure is firstly increased to 32MPa, the pressure is maintained for 10min, the pressure of the gas cylinder is not lower than 31MPa in the pressure maintaining process, the pressure is continuously increased to 47MPa after the pressure is maintained, the pressure is maintained for 30s, and the gas cylinder is not damaged in the period, so that the blasting test is qualified; and continuously pressurizing to 50MPa, wherein the gas cylinder is still not damaged, and the pressure relief is finished.
Preferably, the batch property test comprises one or more of a normal-temperature hydraulic test, an acoustic emission test, a residual deformation measurement, a normal-temperature airtight test, a fatigue test, a sampling normal-temperature blasting test, a low-temperature strength test and a sampling low-temperature blasting test.
The gas cylinder is applied to heavy carrier rockets.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention innovatively designs a metal gas cylinder design and manufacturing method suitable for a carrier rocket liquid oxygen environment. By carrying out tests such as long-term immersion in liquid oxygen, mechanical impact and the like, the titanium alloy material is determined to be adopted as the raw material of the gas cylinder. The high-pressure metal gas cylinder produced by the material has good compatibility with liquid oxygen, can be used in the environment of a liquid oxygen storage tank of a carrier rocket, and expands the selection range of the overall design scheme.
(2) The large-volume titanium alloy spherical metal gas cylinder designed by the invention also has multiple use advantages, including the capacity of 130L which is obviously increased compared with the existing 20L gas cylinder, high specific strength of the titanium alloy material, high structural efficiency of the spherical structural form and the like. The advantages enable the invention to more effectively reduce the load and improve the carrying efficiency on the carrier rocket.
Drawings
FIGS. 1 and 2 are schematic structural views of the gas cylinder of the present invention;
fig. 3 is a schematic view of the sealing structure of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
As shown in fig. 1 and 2, a large-volume titanium alloy gas cylinder suitable for a liquid oxygen environment comprises a gas cylinder body 1, a pipe joint 2 and a sealing structure 3;
threads are processed at the connecting part of the gas cylinder body and the pipe joint, and the sealing structure is connected and pressed through the threads; the gas cylinder body is made of a metal material compatible with a liquid oxygen environment, and the pipe joint is made of austenitic stainless steel or high-temperature alloy; the compatibility is that the gas cylinder material does not generate physical and chemical reaction when contacting with the internal and external media.
The high-pressure gas cylinder for the carrier rocket can be designed into a cylindrical, spherical and annular symmetrical structure, the structural efficiency (the product of pressure and volume of gas in the gas cylinder under unit mass) of the spherical gas cylinder is the maximum, and in order to reduce the weight of the gas cylinder, the large-volume low-temperature metal gas cylinder adopts a spherical structure scheme. The gas cylinder is formed by welding two hemispheres 11, and the structure of the cylinder body is shown in figure 1. And (3) welding the two hemispheres by adopting electron beam welding, wherein 12 is a welding line, and after the welding is finished, stress relief annealing is carried out. The semi-sphere material of the gas cylinder is made of titanium alloy, the material is in an annealing state, the semi-sphere of the gas cylinder is obtained in a die forging or hot press forming mode, and the pipe joint is obtained in a machining mode by using austenitic stainless steel or high-temperature alloy.
In addition, in order to reduce the number of the gas cylinders used by the rocket, reduce the number of the gas cylinders and the fixing devices and reduce the total assembly workload of the rocket, the volume of a single gas cylinder is designed to be 130L in the embodiment.
Fig. 3 is a schematic view of the sealing structure of the large-volume metal gas cylinder. The sealing structure of the invention is sealed by a red copper gasket, a retainer ring, a universal seal element, a pipe joint and a gas cylinder pipe nozzle through threads to provide pretightening force. In order to improve the sealing reliability, the sealing part is double-channel sealing, wherein one channel of sealing is metal sealing, and the other channel of sealing adopts a flooding plug sealing element, thereby improving the overall sealing reliability.
The material of the metal seal is generally soft metal, such as pure aluminum (L4), pure copper (T2, T3), etc. According to working conditions, copper has good compatibility with liquid oxygen and liquid hydrogen, application experience is realized in both liquid hydrogen and liquid hydrogen, the hardness of annealed copper is low (slightly higher than that of soft aluminum), damage to the sealing surface of the gas cylinder nozzle is small by adopting a screwing installation mode, and therefore copper T2 is selected as a metal sealing member material. The form of the flood plug seal is a radial seal, the seal ring is installed in the groove, the seal lip is compressed, the deformation is offset by the spring force, and the spring force presses the seal lip against the hardware surface. The spring force and the contact of the seal lip with the hardware surface provide a sealing effect, and additional force is generated to act on the seal lip after the system pressure is established. The system pressure and the spring pressure together provide a seal.
The requirements of the low-temperature metal gas cylinder in the aspect of material selection mainly comprise: the high-strength high-temperature-resistant steel has high specific strength value, high strength performance, no brittle transition temperature region in a liquid oxygen working region, excellent atmospheric corrosion resistance, stable medium compatibility to various possibly used media, good process performance and certain mechanical performance at normal temperature.
For the problem of the compatibility of liquid oxygen, the following conclusion can be obtained through long-term soaking and cyclic tests of the liquid oxygen of the titanium alloy material: 1) after the titanium alloy sample is soaked in liquid oxygen, the appearance and the quality of the titanium alloy sample are not obviously changed; 2) the titanium alloy sample in the liquid oxygen environment impacts under the appointed mechanical impact energy, and phenomena such as sparks, detonating, explosion, combustion and the like do not occur. Therefore, the titanium alloy material is not sensitive to mechanical impact in the liquid oxygen environment. The pipe joint is made of austenitic stainless steel or high-temperature alloy, and the sealing ring is made of red copper or pure aluminum.
The gas cylinder is manufactured by four steps:
in the first step, a metal plate which is theoretically compatible with the liquid oxygen environment is selected.
The metal material needs to be subjected to a liquid oxygen long-term immersion test, a liquid oxygen environment mechanical impact test and an oxygen scouring test, and if the material passes the three tests, the material is considered to be capable of being used for producing a large-volume metal gas cylinder.
Test one, liquid oxygen long-term immersion test:
the liquid level of the liquid oxygen for the test is 10-15 mm higher than the top surface of the product to be tested so as to ensure that the product to be tested is completely soaked in the liquid oxygen all the time. Soaking for 24h, taking out, recovering to normal temperature, drying, checking whether the surface state and the weight of the product to be tested are changed, completing 1 cycle, and repeating for 5 times. If the surface state and the weight of the product to be tested are not changed after 5 times of circulation, determining that the product to be tested passes the liquid oxygen long-term soaking test; otherwise the test is failed.
Test II, liquid oxygen environment mechanical impact test:
the method is carried out on normal-pressure liquid oxygen mechanical impact test equipment. The test equipment consists of a guide rail, a steel hammer, an electromagnet, a striking column, an impact cup, an anvil and a base and is arranged in an explosion-proof chamber with an observation window and shading. Before testing, cleaning the impact column, the impact cup, the test piece and the like, and then precooling by using liquid oxygen; during the test, the test piece is placed at the bottom of the impact cup and presses the impact column, after the impact cup is filled with liquid oxygen, the impact cup is placed in the anvil tank, and a steel hammer with certain mass freely falls onto the impact column from a certain height so as to generate phenomena of fire striking, combustion, explosion sound, burning of the test piece or the impact column and the like, and the phenomena serve as judgment basis for impact sensitivity. And observing whether the phenomena of fire, explosion and the like occur.
The judgment standard of the normal pressure liquid oxygen mechanical impact test is as follows: (1) under the condition of 98J impact energy, 20 samples of a material are subjected to an impact test continuously, and no reaction occurs, namely the samples pass batch inspection; otherwise, continuing to perform 20 sample impact tests, if 1 sample has reaction, stopping the test, and stopping batch inspection; (2) under the condition of 98J impact energy, 60 samples of a material are subjected to an impact test continuously, and no more than 1 sample is reacted, namely, the materials pass batch inspection; there were 2 reactions that occurred and the test was stopped and the batch failed.
Test three, oxygen scouring test:
and respectively carrying out liquid oxygen and gas oxygen scouring tests by using low-temperature liquid oxygen and gas oxygen, wherein the liquid oxygen is flushed at the flow velocity of 1.6m/s, 88K and 1.6m/s for 10min in the tangential direction and the normal direction, and the gas oxygen is flushed at the flow velocity of 1.6m/s, 140K and 1.6m/s for 10min in the tangential direction and the normal direction. The presence or absence of reaction, blackening, etc. of the sample was observed.
Because the metal gas cylinder contains the welding seam, the material structure of the welding seam area is different from that of the material body, and a liquid oxygen long-term immersion test, a liquid oxygen environment mechanical impact test and an oxygen scouring test are also required to be carried out on the welding seam area. If the material body and the welding area pass through the first step of three tests, the feasibility of the material body and the welding process is verified, and the second step is carried out; otherwise, the material of the gas cylinder or the welding process is replaced, and the verification is restarted.
And secondly, determining a gas cylinder forming process.
Forming a gas cylinder hemisphere by using a superplastic forming mode, and machining a connecting part of a gas cylinder body and a pipe joint; and forming a whole ball by welding the two hemispheres, and installing a pipe joint and a sealing structure to obtain the gas cylinder.
And thirdly, carrying out a whole bottle test.
The four test tests required for the whole bottle include: the method comprises a whole bottle liquid oxygen soaking cycle test, a low-temperature inflation and deflation test, a pressure cycle test and a low-temperature blasting test, and aims to check whether the material and the forming process meet the use requirements.
Test one, the whole bottle liquid oxygen soaking cycle test:
and (4) carrying out a cyclic soaking test on the gas cylinder soaking liquid oxygen obtained in the second step for 48h, taking out, recovering to normal temperature, drying, and checking whether the surface state and the weight of the gas cylinder change. If the surface state and the weight of the product to be tested are not changed after the test, determining that the product to be tested passes the liquid oxygen long-term soaking test; otherwise the test is failed.
Test II, low-temperature inflation and deflation test:
and soaking the gas cylinder in liquid nitrogen, and performing a gas charging and discharging test after the temperature is completely reduced to the liquid nitrogen temperature. In each test process, after the inflation is finished, the pressure is maintained until the temperature is balanced, and then the deflation test is carried out. And recording the pressure and temperature in the cylinder, the wall surface temperature of the cylinder, the temperature before the helium gas is filled into the cylinder and the change of the flow rate of charging and discharging gas in the test process, and carrying out sound emission monitoring and recording in the process of the charging and discharging test.
Test three, pressure cycle test:
the gas cylinder used for completing the low-temperature inflation and deflation test is firstly subjected to a hydraulic pressure of 0 MPa-15 MPa-0 MPa for 100 times of normal-temperature pressure cycle test, the test medium is pure water, the pressurization speed is not higher than 1MPa/min, and the pressure is maintained at 15MPa for 30 s. And then carrying out a low-temperature pressure cycle test, soaking the gas cylinder in liquid nitrogen, filling the liquid nitrogen into the gas cylinder, filling helium which is cooled by the liquid nitrogen into the gas cylinder after the temperature is completely balanced, pressurizing, carrying out 22 times of low-temperature pressure cycle tests at the pressure rate of not higher than 1MPa/min and maintaining the pressure at the pressure of 23MPa for 30s, wherein the pressure is increased at the pressure of 23 MPa. And acoustic emission monitoring and recording are required in the test process.
Test four, low-temperature blasting test:
and performing a liquid nitrogen temperature zone low-temperature blasting test by using the gas cylinder which completes the pressure cycle test. Millet is filled in the gas cylinder, and helium is filled to 10MPa at normal temperature. And then soaking the gas cylinder in liquid nitrogen, after the temperature is completely balanced, filling helium which is cooled by the liquid nitrogen into the gas cylinder, pressurizing the gas cylinder slowly to 32MPa according to three test pressure requirements, maintaining the pressure for 10min, wherein the pressure of the gas cylinder is not lower than 31MPa in the pressure maintaining process, continuously pressurizing the gas cylinder to 47MPa after pressure maintaining, maintaining the pressure for 30s, and determining that the blasting test is qualified if the gas cylinder is not damaged in the period. And continuously pressurizing to 50MPa, wherein the gas cylinder is still not damaged, the pressure is allowed to be released, and the test is finished.
Step three, if all the four tests are passed, checking the whole gas cylinder, and turning to the step four; otherwise, the material of the gas cylinder or the forming process is replaced, and the verification is restarted.
Fourthly, recovering the gas cylinders, producing the gas cylinders in batches generally, and performing batch tests, wherein the batch tests comprise: the method comprises the following steps of normal-temperature hydraulic test, acoustic emission inspection, residual deformation measurement, normal-temperature airtight test, fatigue test, spot check normal-temperature blasting test, low-temperature strength test and spot check low-temperature blasting test. And if the batch test purpose is passed completely, the batch of gas cylinders can be delivered and used as final qualified products.
The invention has not been described in detail in part of the common general knowledge of those skilled in the art.
Claims (7)
1. A manufacturing method of a large-volume titanium alloy gas cylinder suitable for a liquid oxygen environment is characterized by comprising the following steps: the large-volume titanium alloy gas cylinder comprises a gas cylinder body, a pipe joint and a sealing structure; threads are processed at the connecting part of the gas cylinder body and the pipe joint, and the sealing structure is connected and pressed through the threads; the gas cylinder body is made of a metal material compatible with a liquid oxygen environment, and the pipe joint is made of austenitic stainless steel or high-temperature alloy; the compatibility is that the gas cylinder material is contacted with the internal and external media and does not generate physical and chemical reaction; the gas cylinder body is made of annealed titanium alloy; the titanium alloy is TC4ELI or TA7 ELI; the sealing structure adopts a double-channel redundant sealing design, namely an inner channel is a flooding plug sealing element, and an outer channel is a copper or aluminum gasket; the large volume is more than 100L; the manufacturing method is realized by the following modes:
firstly, selecting a metal material plate compatible with a liquid oxygen environment;
secondly, welding the selected metal material plate by using the selected welding process; carrying out a material liquid oxygen long-term immersion test, a liquid oxygen environment mechanical impact test and an oxygen scouring test on the selected metal material plate and the welding seam area, if the plate and the welding seam area pass the three tests, verifying that the material and the welding process are feasible, turning to the third step, otherwise, replacing the material of the gas cylinder or the welding process, and restarting verification;
the liquid oxygen long-term soaking test specifically comprises the following steps: immersing a product to be tested in liquid oxygen, immersing for at least 24h, taking out, recovering to normal temperature, drying, checking whether the surface state generates color or tissue change, judging whether the weight of the test product changes if the surface state does not change, completing 1 cycle, and repeating for at least 5 times; if the surface state and the weight of the product to be tested are not changed after each circulation, the test product is determined to pass the liquid oxygen long-term soaking test; otherwise, the test is failed;
the liquid oxygen environment mechanical impact test specifically comprises the following steps: placing a product to be tested in a liquid oxygen environment, releasing free fall through a ram to impact the product to be tested, judging whether a sensitivity phenomenon occurs under the impact of at least 98J energy, if so, failing to pass the test, otherwise, considering that the test is passed;
the oxygen scouring test comprises a liquid oxygen scouring test and a gas oxygen scouring test; wherein, in the liquid oxygen scouring test: flushing liquid oxygen at a flow rate of at least 1.6m/s tangentially and normally for at least 10 min; in the oxygen scouring test: flushing the gas oxygen at the flow rate of at least 1.6m/s for at least 10min in the tangential and normal directions;
thirdly, determining a gas cylinder forming process:
forming a gas cylinder hemisphere by using a superplastic forming mode, and machining a connecting part of a gas cylinder body and a pipe joint;
forming a whole ball by welding the two hemispheres, and mounting a pipe joint and a sealing structure to obtain the gas cylinder;
fourthly, performing a material liquid oxygen long-term soaking test, a low-temperature gas charging and discharging test, a pressure cycle test and a low-temperature explosion test on the gas cylinder, if the gas cylinder passes the four tests, checking the whole gas cylinder, and turning to the fifth step; otherwise, replacing the material of the gas cylinder or the forming process, and verifying from the second step;
and fifthly, producing the gas cylinders in batches, and performing batch tests, wherein the batch tests are all passed, and the gas cylinders in the batch can be delivered and used as final qualified products.
2. The method of claim 1, wherein: the sensitivity phenomena comprise the phenomena of flash fire, combustion, explosion sound, test piece or column burning.
3. The method of claim 1, wherein: and in the fourth step, the gas cylinder is soaked in liquid nitrogen, and after the temperature is completely reduced to the liquid nitrogen temperature, a gas charging and discharging test is carried out.
4. The method of claim 1, wherein: in the fourth step, the pressure cycle test is carried out at normal temperature by taking purified water as a test medium, and the pressurizing rate is not higher than 1MPa/min in the test process; and then, carrying out a low-temperature pressure cycle test, soaking the gas cylinder in liquid nitrogen, filling the liquid nitrogen into the gas cylinder, filling helium which is cooled by the liquid nitrogen into the gas cylinder after the temperature is completely balanced, and pressurizing at the pressurizing rate of not higher than 1 MPa/min.
5. The method of claim 1, wherein: the low-temperature blasting test specifically comprises the following steps: filling solid particles in the gas cylinder, filling helium gas to 10MPa at normal temperature, then soaking the gas cylinder in liquid nitrogen, filling helium gas cooled by the liquid nitrogen into the gas cylinder after the temperature is completely balanced, pressurizing to 32MPa, maintaining the pressure for 10min, keeping the pressure of the gas cylinder not lower than 31MPa in the pressure maintaining process, continuously pressurizing to 47MPa after pressure maintaining, maintaining the pressure for 30s, and considering that the blasting test is qualified if the gas cylinder is not damaged in the period; and continuously pressurizing to 50MPa, wherein the gas cylinder is still not damaged, and the pressure relief is finished.
6. The method of claim 1, wherein: the batch property test comprises one or more of a normal-temperature hydraulic test, an acoustic emission test, a residual deformation measurement, a normal-temperature airtight test, a fatigue test, a sampling normal-temperature blasting test, a low-temperature strength test and a sampling low-temperature blasting test.
7. Gas cylinders produced by the process according to any one of claims 1 to 6 for use in heavy-duty launch vehicles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109366106A CN109366106A (en) | 2019-02-22 |
| CN109366106B true CN109366106B (en) | 2021-02-09 |
Family
ID=65377498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811436408.8A Active CN109366106B (en) | 2018-11-28 | 2018-11-28 | Large-volume titanium alloy gas cylinder suitable for liquid oxygen environment, manufacturing method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109366106B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106342144B (en) * | 2008-12-11 | 2012-07-18 | 上海航天精密机械研究所 | The manufacture method of anti-liquid oxygen environment titanium alloy cylinder |
| CN107448771A (en) * | 2017-08-24 | 2017-12-08 | 洛阳双瑞特种装备有限公司 | A kind of big volume titanium-alloy high-pressure seamless gas cylinder and preparation method |
| CN108188301A (en) * | 2018-01-26 | 2018-06-22 | 烟台台海材料科技有限公司 | A kind of preparation method and gas cylinder of seamless gas cylinder |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104114931A (en) * | 2011-12-05 | 2014-10-22 | 蓝波股份有限公司 | Ultra-high operating pressure vessel |
| CN108342081B (en) * | 2018-02-09 | 2020-11-10 | 中国人民解放军陆军军医大学 | Carbon fiber resin liquid oxygen bottle and preparation method thereof |
-
2018
- 2018-11-28 CN CN201811436408.8A patent/CN109366106B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106342144B (en) * | 2008-12-11 | 2012-07-18 | 上海航天精密机械研究所 | The manufacture method of anti-liquid oxygen environment titanium alloy cylinder |
| CN107448771A (en) * | 2017-08-24 | 2017-12-08 | 洛阳双瑞特种装备有限公司 | A kind of big volume titanium-alloy high-pressure seamless gas cylinder and preparation method |
| CN108188301A (en) * | 2018-01-26 | 2018-06-22 | 烟台台海材料科技有限公司 | A kind of preparation method and gas cylinder of seamless gas cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109366106A (en) | 2019-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109366106B (en) | Large-volume titanium alloy gas cylinder suitable for liquid oxygen environment, manufacturing method and application thereof | |
| CN107515150B (en) | Comprehensive test experimental device for mechanical properties of marine pipeline | |
| JP2020003005A (en) | Hydrogen gas compression system and hydrogen gas compression method | |
| CN108804813B (en) | Reliability assessment method for space rail-controlled engine | |
| CN112964540A (en) | Device and method for testing dynamic performance of rock under high water pressure and high ground stress coupling | |
| CN111811809A (en) | Quality control method for valve seat assembly | |
| CN101625278A (en) | Heat condition pressure test method of titanium-steel composite board reactor welding seam | |
| CN104896009B (en) | Anti-recoil device for dropping hammer experiment system | |
| Takaki et al. | Effects of flange rotation on the sealing performance of pipe flange connections | |
| CN211697315U (en) | Ground impact stress principle simulation device | |
| CN114563280A (en) | LNG low-temperature hose performance testing device and method | |
| CN113970483B (en) | Stretch bending and high-pressure loading coupling in-situ XAS testing device and method | |
| CN106342144B (en) | The manufacture method of anti-liquid oxygen environment titanium alloy cylinder | |
| CN113217804B (en) | Liquid-oxygen isolation protective layer for composite material gas cylinder and mounting method | |
| CN200993294Y (en) | High pressure fluid pulse buffer | |
| CN114441306A (en) | Method and device for testing metal protective coating in stress corrosion environment | |
| CN208268443U (en) | A kind of major accident release gate valve | |
| CN107420717A (en) | A kind of bladder-type Low rigidity suspension apparatus | |
| Beck et al. | Titan 6–4 hemispheres for SCA system of ariane 5 | |
| US7240538B1 (en) | Hydro test apparatus and method for ammunition | |
| Aihara et al. | Burst tests for high-pressure hydrogen gas line pipes | |
| CN112395796A (en) | Pressure accumulator diaphragm box vibration fatigue life analysis method considering gas-liquid-solid coupling effect | |
| CN109571995A (en) | A kind of pressure-bearing shell of pressure-bearing cylinder production method, pressure-bearing cylinder and buoyancy system of meeting an urgent need | |
| CN115855701A (en) | Three-level light gas gun loading experiment system based on oxyhydrogen detonation drive | |
| CN217443051U (en) | LNG low temperature hose capability test device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |