CN-117781156-B - Composite material pressure vessel with equatorial screw boss for high-temperature fuel gas and manufacturing method thereof

CN117781156BCN 117781156 BCN117781156 BCN 117781156BCN-117781156-B

Abstract

The invention provides a composite material pressure vessel with an equatorial boss for high-temperature fuel gas and a manufacturing method thereof, wherein the composite material pressure vessel comprises a heat insulation layer, a metal lining and a composite material layer; the method mainly comprises the steps of metal lining forming, metal lining weld repairing and grinding, heat insulation layer spraying, heat insulation layer curing, metal lining outer surface glue supplementing, annular composite material layer winding, equatorial boss fiber cloth reinforcement winding, lining composite material layer spiral winding, equatorial S-shaped fiber winding, composite material layer surface treatment and fiber curing. The invention solves the problems that the prior pressure vessel for high-temperature fuel gas can only adopt a heavy all-metal structural scheme to realize equatorial boss connection and can not realize light weight, and the matching problem of high-temperature resin and titanium alloy lining, and provides a solution for the manufacturing method of the pressure vessel with equatorial boss for high-temperature fuel gas.

Inventors

SHI HUA
LIU YINGHAN
LU YAQING
GE NING
FAN KAI
WANG HUA
ZHAO HEMING

Assignees

上海空间推进研究所

Dates

Publication Date: 20260512
Application Date: 20240104

Claims (9)

1.A method of manufacturing a composite pressure vessel with equatorial bosses for high temperature combustion gases, comprising: step S1, forming a metal lining; step S2, repairing and grinding a welding line of the metal lining; step S3, spraying a heat insulation layer on the inner wall of the metal lining; s4, solidifying the heat insulation layer; s5, glue is added to the outer surface of the metal lining; s6, circumferentially winding a composite material layer on the equatorial boss of the metal lining; s7, reinforcing and winding the equatorial boss fiber cloth; Step S8, spirally winding the lining composite material layer, and repeatedly executing the steps S7 to S8 until the preset condition is met; s9, winding S-shaped fibers of the equatorial boss; step S10, surface treatment is carried out on the composite material layer; Step S11, solidifying the fiber; And (3) inflating the pressure vessel, wherein the pressure is always kept at 0.5-2 MPa, the fiber curing temperature is increased to 400-450 ℃, and the temperature is kept for 5-10 hours.
2. The method for manufacturing a composite material pressure vessel with an equatorial boss for high-temperature fuel gas according to claim 1, wherein in the step S1, the metal lining is formed by welding a plurality of shells, and the metal lining is welded in a segmented manner so as to avoid the occurrence of the offset of the thin-wall shells; And grinding the welding line of the metal lining by adopting sand paper, cleaning the ground surface, and ensuring that the height of the ground welding line is not higher than a preset value.
3. The method for manufacturing a composite pressure vessel with equatorial boss for high temperature fuel gas as claimed in claim 1, wherein said step S3 is to uniformly coat the inner surface with heat-insulating coating by spraying the inner wall of the metal lining to a thickness satisfying a predetermined requirement.
4. The method for manufacturing a composite pressure vessel with equatorial boss for high temperature fuel gas as claimed in claim 1, wherein the step S5 is to fill the non-smooth transition region of the lining and the recessed region of the weld joint with fiber and glue to prevent fiber from being raised during fiber winding.
5. The method for manufacturing a composite pressure vessel with equatorial bosses for high temperature gas of claim 1, wherein step S6 comprises wet winding composite layers around upper and lower circumferential regions of the equatorial bosses of the metal liner; The step S8 is to wind the lining composite material layer by adopting a spiral wet method.
6. The method for manufacturing a composite material pressure vessel with equatorial bosses for high temperature fuel gas according to claim 1, wherein the step S7 is to impregnate the colloid with cross fiber cloth with a determined size and then to lay down and adhere fiber winding blind areas of each equatorial boss of the metal lining.
7. The method for manufacturing a composite pressure vessel with equatorial bosses for high-temperature fuel gas according to claim 1, wherein the step S9 is to wind the fibers from the lower root portion of the previous equatorial boss to the upper root portion of the next equatorial boss in the order of wet winding.
8. The method for manufacturing a composite material pressure vessel with equatorial bosses for high temperature fuel gas according to claim 1, wherein the step S10 is to treat the fiber crossing gaps of the fiber composite material layer to reduce the exposed area of the liner as much as possible, and simultaneously to squeeze and remove the adhesive from the fiber accumulated at the root of the flange support lugs to effectively improve the thickness of the fiber accumulation.
9. A composite pressure vessel with equatorial boss for high temperature fuel gas prepared by the method of manufacturing a composite pressure vessel with equatorial boss for high temperature fuel gas as claimed in any one of claims 1 to 8.

Description

Composite material pressure vessel with equatorial screw boss for high-temperature fuel gas and manufacturing method thereof Technical Field The invention relates to the technical field of manufacturing of high-temperature composite material pressure containers, in particular to a composite material pressure container with an equatorial threaded boss for high-temperature fuel gas and a manufacturing method thereof. Background The high-temperature pressure container for the high-temperature gas system is mainly used for storing liquid and gas media and bears certain pressure to realize the functions of power propulsion, pressure supply and the like. Because of the high temperature environment, the conventional normal temperature composite material can not be directly adopted for winding the pressure vessel, only an all-metal pressure vessel can be adopted, and the structure of the equatorial boss limits the winding process scheme. At present, no winding manufacturing method for the composite material pressure vessel with the equatorial boss, which is suitable for high temperature, exists at home and abroad. Disclosure of Invention Aiming at the defects in the prior art, the invention aims to provide a composite material pressure vessel with an equatorial threaded boss for high-temperature fuel gas and a manufacturing method thereof. The invention provides a manufacturing method of a composite material pressure vessel with an equatorial boss for high-temperature fuel gas, which comprises the following steps: step S1, forming a metal lining; step S2, repairing and grinding a welding line of the metal lining; step S3, spraying a heat insulation layer on the inner wall of the metal lining; s4, solidifying the heat insulation layer; s5, glue is added to the outer surface of the metal lining; s6, circumferentially winding a composite material layer on the equatorial boss of the metal lining; s7, reinforcing and winding the equatorial boss fiber cloth; Step S8, spirally winding the lining composite material layer, and repeatedly executing the steps S7 to S8 until the preset condition is met; s9, winding S-shaped fibers of the equatorial boss; step S10, surface treatment is carried out on the composite material layer; And S11, curing the fibers. Preferably, in the step S1, the metal lining is formed by welding a plurality of shells, and the metal lining is welded by adopting segmented welding so as to avoid the occurrence of the offset of the thin-wall shells; And grinding the welding line of the metal lining by adopting sand paper, cleaning the ground surface, and ensuring that the height of the ground welding line is not higher than a preset value. Preferably, the step S3 adopts a spraying mode to the inner wall of the metal lining to uniformly cover the heat insulation coating on the inner surface, and the thickness meets the preset requirement. Preferably, the step S5 is to fill the non-smooth transition area and the weld recess area of the lining with fiber and glue to prevent fiber overhead during fiber winding. Preferably, the step S6 is to wind a composite material layer on the upper and lower circumferential areas of the equatorial boss of the metal lining in a wet method; The step S8 is to wind the lining composite material layer by adopting a spiral wet method. Preferably, the step S7 is to infiltrate the cross fiber cloth with determined size into colloid and then spread and bond fiber winding blind areas of each equatorial boss of the metal lining. Preferably, the step S9 is to wind the fiber from the lower root of the previous equatorial boss to the upper root of the next equatorial boss in turn by wet method. Preferably, in the step S10, the fiber crossing gaps of the fiber composite material layer are treated, so that the exposed area of the lining is reduced as much as possible, and meanwhile, the fibers piled up at the root parts of the flange lugs are extruded and discharged, so that the thickness of the piled fibers is effectively improved. Preferably, the pressure vessel is inflated, the pressure is kept at 0.5-2 MPa all the time, the fiber solidification temperature is raised to 400-450 ℃, and the temperature is kept for 5-10 hours. The composite material pressure vessel with the equatorial boss for the high-temperature fuel gas is prepared by the manufacturing method of the composite material pressure vessel with the equatorial boss for the high-temperature fuel gas. Compared with the prior art, the invention has the beneficial effects that the problem of heavy structural weight of the all-metal scheme of the pressure vessel with the equatorial flange for the high-temperature gas is solved, and a solution is provided for the manufacturing method of the composite pressure vessel with the equatorial flange for the high-temperature gas. Drawings Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodi