CN111678033B - Lining-free composite material liquid oxygen storage tank and preparation method thereof - Google Patents
Lining-free composite material liquid oxygen storage tank and preparation method thereof Download PDFInfo
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- CN111678033B CN111678033B CN202010365217.8A CN202010365217A CN111678033B CN 111678033 B CN111678033 B CN 111678033B CN 202010365217 A CN202010365217 A CN 202010365217A CN 111678033 B CN111678033 B CN 111678033B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C3/00—Vessels not under pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/56—Winding and joining, e.g. winding spirally
- B29C53/58—Winding and joining, e.g. winding spirally helically
- B29C53/60—Winding and joining, e.g. winding spirally helically using internal forming surfaces, e.g. mandrels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/80—Component parts, details or accessories; Auxiliary operations
- B29C53/8008—Component parts, details or accessories; Auxiliary operations specially adapted for winding and joining
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0104—Shape cylindrical
- F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0104—Shape cylindrical
- F17C2201/0114—Shape cylindrical with interiorly curved end-piece
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0602—Wall structures; Special features thereof
- F17C2203/0612—Wall structures
- F17C2203/0614—Single wall
- F17C2203/0617—Single wall with one layer
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0634—Materials for walls or layers thereof
- F17C2203/0658—Synthetics
- F17C2203/066—Plastics
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0634—Materials for walls or layers thereof
- F17C2203/0658—Synthetics
- F17C2203/0663—Synthetics in form of fibers or filaments
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2209/00—Vessel construction, in particular methods of manufacturing
- F17C2209/21—Shaping processes
- F17C2209/2154—Winding
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2209/00—Vessel construction, in particular methods of manufacturing
- F17C2209/23—Manufacturing of particular parts or at special locations
- F17C2209/232—Manufacturing of particular parts or at special locations of walls
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention discloses a lining-free composite material liquid oxygen storage tank and a preparation method thereof. The preparation method of the lining-free composite material liquid oxygen storage tank mainly comprises the following steps: s10 preparing a sand core mold; s20: mounting an inner flange; s30: winding the fibers by a wet method; s40: assembling an outer flange; s50: heating, curing and forming; s60: and (5) washing and demolding. The liquid oxygen storage tank adopts a lining-free structure design, and compared with the storage tank with the lining, the liquid oxygen storage tank can effectively reduce the weight of a product by 20-40 percent, thereby improving the carrying capacity of a spacecraft and saving the cost; and the preparation period is short and the flow is simple.
Description
Technical Field
The invention relates to the technical field of fiber winding and forming of composite material products, in particular to a lining-free composite material liquid oxygen storage tank and a preparation method thereof.
Background
In recent years, the weight of a metal storage tank is reduced by structural optimization design, and basically the limit is reached, and the composite fiber winding container has the advantages of light weight and high strength and gradually enters the visual field of people, so that the container for storing liquid oxygen in the spacecraft is usually prepared by adopting composite materials.
The existing liquid oxygen storage tank is generally a composite material storage tank with a metal or nonmetal inner liner, wherein the inner liner plays a core mold role during winding and serves as a sealing structure of an inner layer of the composite material storage tank, the weight of the storage tank is further increased due to the existence of the inner liner, and the production process and the cost of the liquid oxygen storage tank are increased due to the manufacture of the inner liner.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a lining-free composite material liquid oxygen storage tank and a preparation method thereof, so that the weight of the composite material liquid oxygen storage tank is reduced, the carrying efficiency of a spacecraft is improved, and the production cost is reduced.
In order to realize the effect, the invention adopts the technical scheme that:
the lining-free composite material liquid oxygen storage tank comprises a front seal head outer flange, a front seal head inner flange, a rear seal head outer flange, a rear seal head inner flange and a composite material layer, wherein the front seal head outer flange and the front seal head inner flange are assembled and fixed at a front polar hole part of the composite material layer, and the rear seal head outer flange and the rear seal head inner flange are assembled and fixed at a rear polar hole part of the composite material layer.
Furthermore, the lower end face of the front end socket inner flange and the lower end face of the rear end socket inner flange are both provided with flanges, the lower surface of the front end socket outer flange and the upper surface of the flange of the front end socket inner flange are respectively attached to two side walls of the front pole hole part of the composite material layer, and the lower surface of the rear end socket outer flange and the upper surface of the flange of the rear end socket inner flange are respectively attached to two side walls of the rear pole hole part of the composite material layer.
Furthermore, the upper end face of the front seal head outer flange and the upper end face of the rear seal head outer flange are provided with a sealing groove and a through threaded hole.
Furthermore, the front seal head outer flange is in threaded connection with the outer side of the front seal head inner flange, and the end part of the composite material layer front pole hole part is positioned between the opposite surfaces of the front seal head outer flange and the front seal head inner flange;
the rear end socket outer flange is in threaded connection with the outer side of the rear end socket inner flange, and the end part of the composite material layer rear pole hole is located between the surfaces, opposite to the rear end socket outer flange and the rear end socket inner flange.
Further, the surfaces of the front seal head outer flange, the front seal head inner flange, the rear seal head outer flange and the rear seal head inner flange are all subjected to anodizing treatment.
Furthermore, the composite material layer is formed by winding carbon fiber/improved liquid oxygen compatible low-viscosity resin by a wet method, heating, rotating and curing.
Also provides a preparation method of the linerless composite material-based liquid oxygen storage tank, which mainly comprises the following steps:
s10: manufacturing a corresponding soluble sand core mold according to the size and shape requirements of the inner surface of the liquid oxygen storage tank, treating the surface of the core mold, and pasting a layer of demolding cloth on the surface of the core mold;
s20: a front seal head inner flange and a rear seal head inner flange are respectively installed and fixed at two ends of the core mold;
s30: placing the core mould on a winding machine, setting a winding program, heating and uniformly stirring a resin solution, cooling the resin solution, placing the resin solution in a glue groove, and enabling the carbon fiber yarn bundle on the creel to pass through the glue groove to perform wet winding on the surface of the core mould;
s40: after winding, fastening the front seal head outer flange on the front seal head inner flange, and fastening the rear seal head outer flange on the rear seal head inner flange;
s50: after winding, moving the liquid oxygen storage tank into curing equipment for curing;
s60: and after the solidification is finished, obtaining a liquid oxygen storage tank blank through a demoulding process, and cleaning the surface of the liquid oxygen storage tank blank to obtain the required lining-free composite material liquid oxygen storage tank.
Further, in step S10, the surface treatment of the core mold includes a defect portion smoothing treatment and a surface polishing treatment.
Further, in step S30, the wet winding process includes:
s301: spirally winding carbon fibers on the surface of the core mold at a certain winding angle along the core mold, and annularly winding the barrel body section to form an inner winding layer;
s302: the surface of the inner winding layer is wrapped with a layer of gauze;
s303: the spiral winding and hoop winding of the fiber yarn are performed again on the surface of the tissue yarn to form a complete winding layer, and the excess resin solution is scraped off during the winding process.
Further, in step S50, the curing temperature is not higher than 160 ℃ and the curing time is not lower than 10 h.
Compared with the prior art, the invention has the following beneficial effects:
1. compared with the lined storage tank, the lined composite material-free liquid oxygen storage tank can reduce the weight by 20-40%, effectively improve the carrying efficiency and save the cost;
2. the composite material layer and the external structural member are connected by the internal flange and the external flange, so that the structure is simple, and the process is simple and convenient;
3. the invention adopts the resin with improved low-temperature liquid oxygen compatibility, effectively reduces the cracking property of the resin in a low-temperature state and avoids the leakage of liquid oxygen.
Drawings
FIG. 1 is a schematic view of the overall structure of a linerless composite liquid oxygen storage tank of the present invention;
FIG. 2 is a schematic structural view of the front end enclosure outer flange and the front end enclosure inner flange in a connection state according to the present invention;
FIG. 3 is a process flow diagram of the method of making a linerless composite liquid oxygen storage tank of the present invention.
In the figure: the composite material layer comprises a front end enclosure outer flange 1, a front end enclosure inner flange 2, a rear end enclosure outer flange 3, a rear end enclosure inner flange 4 and a composite material layer 5.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
Referring to fig. 1, a lining-free composite material liquid oxygen storage tank includes a front head outer flange 1, a front head inner flange 2, a rear head outer flange 3, a rear head inner flange 4, and a composite material layer 5, wherein the front head outer flange 1 and the front head inner flange 2 are assembled and fixed at a front pole hole portion of the composite material layer 5, and the rear head outer flange and the rear head inner flange 4 are assembled and fixed at a rear pole hole portion of the composite material layer 5.
In the embodiment, the front head outer flange 1, the front head inner flange 2, the rear head outer flange 3 and the rear head inner flange 4 are all made of aluminum alloy materials, the actual shape and size of each flange are determined according to the actual use requirement of the liquid oxygen storage tank, the surface of each flange is subjected to anodization treatment, and the surface of each flange is kept smooth and clean before the liquid oxygen storage tank is prepared.
Further, the diameter of the front end enclosure outer flange 1 is 1-4 times of the diameter of the rear end enclosure outer flange 3, and correspondingly, the diameter of the front end enclosure inner flange 2 is the same multiple of the diameter of the rear end enclosure inner flange 4, so that the preparation and use requirements of the liquid oxygen storage tanks with different apertures are met. The lower end face of the front end socket inner flange 2 and the lower end face of the rear end socket inner flange 4 are both provided with flanges. The external diameter of the flanges of the front seal head inner flange 2 and the rear seal head inner flange 4 is 1.2-1.5 times of the diameter of the pole hole of the composite material layer 5 at the corresponding mounting position, and the thickness of the flanges is 1-10 mm. The length of the curve of the lower surfaces of the front end enclosure outer flange 1 and the rear end enclosure outer flange 3 is 1.1-1.3 times of the width of the winding yarn belt used for preparing the composite material layer 5.
The upper surface of the turned edge of the inner flange 2 of the front end enclosure is matched with the elliptical surface shape of the core mould at the polar hole position for manufacturing the composite material layer 5, so that the inner wall of the composite material layer 5 is a continuous curved surface after the manufacturing is finished. Meanwhile, the shape of the lower surface of the front end enclosure outer flange 1 is matched with the shape of the outer wall surface of the corresponding pole hole part of the composite material layer 5, so that the lower surface of the front end enclosure outer flange 1 and the upper surface of the flange of the front end enclosure inner flange 2 are respectively attached and connected with two side walls of the front pole hole part of the composite material layer 5, and a complete sealing connection structure is formed. Similarly, the rear end socket outer flange 3 and the front end socket outer flange 1 adopt similar structural design, and the rear end socket inner flange 4 and the front end socket inner flange 2 adopt similar structural design, so that the lower surface of the rear end socket outer flange 3 and the upper surface of the rear end socket inner flange 4 are respectively attached to two side walls of a rear pole hole part of the composite material layer 5.
As shown in fig. 2, the upper end surface of the front head outer flange 1 is provided with a sealing groove and a through threaded hole, and the front head outer flange 1 is fastened to the outer side of the front head inner flange 2 through threaded connection. The length of the external thread section on the front end socket inner flange 2 is enough to ensure that after the front end socket outer flange 1 and the front end socket inner flange 2 are assembled, the front pole hole part of the composite material layer 5 is vertically attached to the opposite surfaces of the front end socket outer flange 1 and the front end socket inner flange 2, so that the end part of the front pole hole of the composite material layer 5 is embedded, fixed and connected between the front end socket outer flange 1 and the front end socket inner flange 2 in a sealing manner. Meanwhile, the inner side surface of the front end socket inner flange 2 is a conical surface and is used for assembling and positioning on a core mould for preparing the composite material layer 5.
Similarly, the same connection mode is adopted between the rear end socket outer flange 3 and the rear end socket inner flange 4, so that the end part of the rear pole hole of the composite material layer 5 is embedded, fixed and connected in a sealing mode between the rear end socket outer flange 3 and the rear end socket inner flange 4.
The composite layer 5 is formed by adopting SYT49S-12K type carbon fiber/improved liquid oxygen compatible low-viscosity resin to wind by a wet method and heating and curing.
The preparation method of the linerless composite material liquid oxygen storage tank mainly comprises the following steps:
s10: the corresponding soluble sand core mould is manufactured according to the size and shape requirements of the inner surface of the liquid oxygen storage tank, the surface of the core mould is treated, and a layer of demoulding cloth is stuck on the surface of the core mould.
In the step, the soluble sand core mold is made of a conventional core making material consisting of quartz sand, water and polyvinyl alcohol, and a metal core shaft is arranged at the axis of the core mold. The core mold is manufactured in a molding die, and after the core mold is taken out, the surface of the core mold is appropriately inspected and treated. The surface treatment of the core mold comprises the filling treatment of the defect part and the polishing treatment of the surface so as to ensure the surface of the core mold to be smooth and continuous, thereby ensuring the surface smoothness of the prepared composite material layer 5.
Meanwhile, the demolding cloth is reliably attached to the surface of the mandrel, so that the phenomenon that the surface of the demolding cloth is wrinkled is avoided.
S20: and a front seal head inner flange 2 and a rear seal head inner flange 4 are respectively installed and fixed at two ends of the core mold.
Specifically, the redundant parts at the two ends of the sand core die are removed firstly, then the front end socket inner flange 2 is sleeved on the metal mandrel from one end of the core die, the front end socket inner flange 2 is moved to the position where the front end socket inner flange is matched with the mandrel, and the positioning and the fastening are realized by the interference fit of the conical surface of the front end socket inner flange 2 and the metal mandrel. At the moment, the upper surface of the turned edge of the front end socket inner flange 2 and the elliptical surface of the core mould are the same elliptical surface.
The rear end socket inner flange 4 is assembled on the core mould in the same way as the front end socket inner flange 2, and then auxiliary tools are arranged at two ends of the metal core mould for subsequent positioning and clamping of the core mould.
S30: and (3) placing the core mould on a winding machine, setting a winding program according to a required layer laying angle, heating and uniformly stirring the resin solution, placing the resin solution in a glue groove, and enabling the carbon fibers on the creel to pass through the glue groove and perform wet winding on the surface of the core mould under the guidance of a yarn guide nozzle.
In this embodiment, the composite layer 5 is mainly made of SYT49S-12K type carbon fiber/liquid oxygen compatibility-improved low-viscosity resin. Stirring the low viscosity resin with improved liquid oxygen compatibility and the curing agent uniformly at 80 ℃ for 5-6min, then stirring uniformly by adopting a water bath and cooling to room temperature.
The winding angle and the number of the composite material layers are [ +/-17/90 ]2/±17/902]The middle of the composite material layer is wrapped with a layer of gauze, and the thickness of the composite material layer is 2-10 mm.
The wet winding process comprises the following specific steps:
s301: the winding machine drives the core mould to rotate and drives the yarn guide nozzle to reciprocate along the axis direction of the core mould, so that the carbon fiber is spirally wound and annularly wound on the barrel body section on the surface of the core mould at a certain winding machine angle along the core mould to form an inner winding layer;
s302: and after the inner winding layer is finished, a layer of gauze is wrapped on the surface. The tissue may be further impervious.
S303: and (3) rewinding the carbon fibers on the surface of the tissue, and scraping off redundant resin by using a scraper in the winding process so as to smooth the surface of the composite layer 5.
S40: after winding is finished, fastening the front end enclosure outer flange 1 on the front end enclosure inner flange 2 through thread fit to realize sealing connection; similarly, the rear end socket outer flange 3 is fastened on the rear end socket inner flange 4 through thread fit, so that sealing connection is realized.
S50: and after winding, moving the liquid oxygen storage tank into curing equipment for curing.
In the step, a curing furnace is adopted to carry out rotary heating curing on the wound liquid oxygen storage tank, the curing temperature is not higher than 160 ℃, and the curing time is not lower than 10 hours. The specific parameters and process parameters are as follows: heating to 100 deg.C at room temperature for 20min, maintaining at 100 deg.C for 2h, heating to 130 deg.C from 100 deg.C for 10min, maintaining at 130 deg.C for 2h, heating to 155 deg.C from 130 deg.C for 10min, maintaining at 155 deg.C for 6h, and naturally cooling.
S60: and after the solidification is finished, obtaining a liquid oxygen storage tank blank through a demoulding process, and cleaning the surface of the liquid oxygen storage tank blank to obtain the required lining-free composite material liquid oxygen storage tank.
And (4) washing the quartz sand core mold with warm water for demolding, and taking out the inner layer demolding cloth of the storage tank after demolding is finished.
The concrete process of the demoulding procedure is as follows: removing auxiliary tools at two ends of the core mold, then washing the core mold with warm water at 80 ℃ for demolding, taking out demolding cloth attached to the inner wall of the liquid oxygen storage tank after demolding is finished, and then performing surface cleaning treatment on the inner wall of the liquid oxygen storage tank to obtain the required lining-free composite material liquid oxygen storage tank.
The composite material liquid oxygen storage tank adopts a lining-free design, can effectively reduce the weight, and can reduce the weight by 20 to 40 percent compared with the lining-free composite material storage tank. The flanges at the pole holes at the two ends are connected by adopting a special structural design, so that the leakage of liquid oxygen can be effectively avoided. The resin used by the composite material is improved resin, and the low-temperature crack resistance and the liquid oxygen compatibility can be effectively improved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A method for manufacturing a lining-free composite material liquid oxygen storage tank is characterized by comprising the following steps: the liquid oxygen storage tank comprises a front seal head outer flange (1), a front seal head inner flange (2), a rear seal head outer flange (3), a rear seal head inner flange (4) and a composite layer (5), wherein the front seal head outer flange (1) and the front seal head inner flange (2) are assembled and fixed at a front polar hole part of the composite layer (5), and the rear seal head outer flange and the rear seal head inner flange (4) are assembled and fixed at a rear polar hole part of the composite layer (5); the lower end surface of the front end socket inner flange (2) and the lower end surface of the rear end socket inner flange (4) are respectively provided with flanges, the lower surface of the front end socket outer flange (1) and the upper surface of the flanges of the front end socket inner flange (2) are respectively attached to two side walls of a front pole hole part of the composite material layer (5), and the lower surface of the rear end socket outer flange (3) and the upper surface of the flanges of the rear end socket inner flange (4) are respectively attached to two side walls of a rear pole hole part of the composite material layer (5);
the preparation method of the liquid oxygen storage tank mainly comprises the following steps:
s10: manufacturing a corresponding soluble sand core mold according to the size and shape requirements of the inner surface of the liquid oxygen storage tank, treating the surface of the core mold, and pasting a layer of demolding cloth on the surface of the core mold;
s20: the method comprises the following steps that a front end socket inner flange (2) and a rear end socket inner flange (4) are respectively installed and fixed at two ends of a core mould, specifically, redundant parts at two ends of the core mould are removed firstly, then the front end socket inner flange (2) is sleeved on a metal core shaft from one end of the core mould, the front end socket inner flange (2) is moved to the position where the front end socket inner flange is matched with the core shaft, positioning and fastening are realized by interference fit of a conical surface of the front end socket inner flange (2) and the metal core shaft, and at the moment, the upper surface of a flanging of the front end socket inner flange (2) and an elliptical surface of the sand core mould are the same elliptical surface; the rear end socket inner flange (4) is assembled on the core mould in the same way as the front end socket inner flange (2);
s30: placing the core mold on a winding machine, setting a winding program, heating and uniformly stirring a low-viscosity resin solution, cooling the low-viscosity resin solution, placing the low-viscosity resin solution in a glue groove, and enabling the carbon fibers on the creel to penetrate through the glue groove to perform wet winding on the surface of the core mold;
s40: after winding is finished, fastening a front end enclosure outer flange (1) on a front end enclosure inner flange (2), and fastening a rear end enclosure outer flange (3) on a rear end enclosure inner flange (4);
s50: after winding, moving the liquid oxygen storage tank into curing equipment for rotary heating and curing;
s60: and after the solidification is finished, obtaining a liquid oxygen storage tank blank through a demoulding process, and cleaning the surface of the liquid oxygen storage tank blank to obtain the required lining-free composite material liquid oxygen storage tank.
2. The method of manufacturing a linerless composite liquid oxygen storage tank of claim 1, wherein: the upper end face of the front end socket outer flange (1) and the upper end face of the rear end socket outer flange (3) are provided with sealing grooves and through threaded holes.
3. The method for manufacturing a linerless composite liquid oxygen storage tank according to claim 2, wherein: the front seal head outer flange (1) is in threaded connection with the outer side of the front seal head inner flange (2), and the end part of the front pole hole part of the composite material layer (5) is positioned between the front seal head outer flange (1) and the opposite surface of the front seal head inner flange (2); the rear end socket outer flange (3) is in threaded connection with the outer side of the rear end socket inner flange (4), and the end part of the rear pole hole part of the composite material layer (5) is located between the opposite surfaces of the rear end socket outer flange (3) and the rear end socket inner flange (4).
4. The method for manufacturing a linerless composite liquid oxygen storage tank according to claim 1, wherein: the surfaces of the front seal head outer flange (1), the front seal head inner flange (2), the rear seal head outer flange (3) and the rear seal head inner flange (4) are all subjected to anodizing treatment.
5. The method for manufacturing a linerless composite liquid oxygen storage tank according to claim 1, wherein: the composite layer (5) is formed by winding carbon fiber/improved liquid oxygen compatible low-viscosity resin by a wet method and heating and curing.
6. The method for manufacturing a linerless composite liquid oxygen storage tank according to claim 1, wherein: in step S10, the surface treatment of the core mold includes a process of flattening the defective portion and a process of polishing the surface.
7. The method for manufacturing a linerless composite liquid oxygen storage tank according to claim 1, wherein: in step S30, the specific process of wet winding is:
s301: spirally winding carbon fibers on the surface of the core mold at a certain winding angle along the core mold, and annularly winding the barrel body section to form an inner winding layer;
s302: the surface of the inner winding layer is wrapped with a layer of gauze;
s303: the spiral winding and hoop winding of the fiber yarn are performed again on the surface of the tissue yarn to form a complete winding layer, and the excess resin solution is scraped off during the winding process.
8. The method for manufacturing a linerless composite liquid oxygen storage tank according to claim 1, wherein: in step S50, the curing temperature is not higher than 160 ℃ and the curing time is not lower than 10 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010365217.8A CN111678033B (en) | 2020-04-30 | 2020-04-30 | Lining-free composite material liquid oxygen storage tank and preparation method thereof |
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| CN112223778A (en) * | 2020-09-23 | 2021-01-15 | 南京航空航天大学 | Method for preparing composite material winding plate |
| CN112963722A (en) * | 2021-02-09 | 2021-06-15 | 兰州空间技术物理研究所 | Metal lining carbon fiber winding composite material gas cylinder and manufacturing method thereof |
| CN113103615B (en) * | 2021-03-19 | 2022-08-12 | 航天材料及工艺研究所 | Integral forming process method of composite material low-temperature storage tank |
| CN115157640B (en) * | 2022-06-29 | 2024-02-13 | 中材科技（苏州）有限公司 | Connecting device for winding and solidifying steel liner and manufacturing method and use method thereof |
| CN115095789B (en) * | 2022-06-30 | 2023-08-18 | 东南大学 | Lining-free cryogenic high-pressure hydrogen storage cylinder and preparation device thereof |
| CN115143386B (en) * | 2022-06-30 | 2024-03-22 | 东南大学 | Preparation method of lining-free cryogenic high-pressure hydrogen storage cylinder |
| CN117754902B (en) * | 2023-12-25 | 2024-08-20 | 沈阳欧施盾新材料科技有限公司 | Low-leakage storage tank based on interface sealing and manufacturing method thereof |
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| US20040026431A1 (en) * | 2002-01-18 | 2004-02-12 | Jones Brian H | Low weight high performance composite vessel and method of making same |
| CN200940767Y (en) * | 2006-06-23 | 2007-08-29 | 哈尔滨航空工业(集团)有限公司 | Composite material cylinder mouth structure of liquefied petroleum gas |
| CN103317628A (en) * | 2013-02-01 | 2013-09-25 | 北京玻钢院复合材料有限公司 | Preparation methods for soluble core mould and nonmetal-lining or no-lining fibre winding container |
| CN105437572B (en) * | 2015-12-11 | 2018-04-17 | 上海复合材料科技有限公司 | Carrier rocket full composite material low-temperature liquid oxygen tank and its manufacture method |
| CN109177226B (en) * | 2018-08-29 | 2020-09-18 | 航天材料及工艺研究所 | Forming die and forming method of composite material box body with approximate closed structure |
| CN110748785A (en) * | 2019-09-13 | 2020-02-04 | 上海空间推进研究所 | Metal and non-metal composite lining fiber winding composite material gas cylinder and manufacturing method thereof |
| CN110985239B (en) * | 2019-10-31 | 2021-04-13 | 北京宇航系统工程研究所 | Lining-free composite material storage box structure |
| CN111016223A (en) * | 2019-11-08 | 2020-04-17 | 北京宇航系统工程研究所 | Detachable combined tool for manufacturing lining-free composite material storage box |
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