100 L carbon fiber wrapped aluminum-lined composite cylinder and manufacture method thereof

Abstract

The present invention provides a 100 L carbon fiber wrapped aluminum-lined composite cylinder, including a weldless aluminum liner, a mounting base, an adhesive layer and a carbon fiber composite layer. The mounting base and the weldless aluminum liner form a smooth flattening winding mandrel; the external part of the mandrel is wound by the carbon fiber composite layer; and the adhesive layer is arranged between the mandrel and the carbon fiber composite layer and is used for firmly connecting the weldless aluminum liner and the carbon fiber composite layer. The composite cylinder has the advantages of large volume, high pressure resistance, high efficiency, light weight, high security, low cost and short manufacturing cycle. The present invention also provides a manufacture method of the carbon fiber wrapped aluminum-lined composite cylinder.

Description

technical field [0001] The invention relates to the field of spacecraft design, in particular to a large-volume, high-pressure-resistant, light-weight, high-efficiency carbon fiber-wound ultra-thin aluminum alloy-lined composite gas cylinder and a manufacturing method thereof. Background technique [0002] Due to a series of advantages such as light weight, high reliability, and the safe failure mode of leak before breaking (LBB), composite gas cylinders have been widely used in the field of aerospace technology. It can increase the payload ratio and reduce the Launch cost, improve use safety, therefore, has gradually replaced traditional metal material gas cylinders in aerospace systems. The composite gas cylinders used in existing spacecraft systems generally have the disadvantages of small volume, low pressure, large weight, and high cost. Generally, the volume is not greater than 60L, the working pressure is not higher than 30MPa, and a safety factor of twice the struc...

AI Technical Summary

Problems solved by technology

However, from the point of view of the manufacturing process, only the aluminum lining can produce a weldless structure, and the titanium lining can only produce a welded structure

The abnormal low-pressure failure of most composite gas cylinders is caused by the welding quality of the metal lining and the unreasonable design of the welding structure. The seamless aluminum alloy lining has the characteristics of no welds, which greatly reduces the abnormality of composite gas cylinders. probability of failure

In addition, due to the high density of titanium, the wall thickness limited by the process cannot be very thin, so the titanium lining is usually heavier than the aluminum lining; because titanium is more expensive than aluminum, and the processing technology of titanium lining ( including welding) is more complex, so a titanium liner is more costly than an aluminum liner

[0006] Therefore, aluminum lined / carbon fiber composite gas cylinders are more suitable for aerospace systems. At present, there is no precedent for the application of 100-liter ultra-thin aluminum liners in China. The existing small-volume aluminum liners generally have thicker walls. The weight of the gas cylinder is relatively large, and because the aluminum lining only acts as a closed pressurized medium, it does not share the load itself, which limits the structural efficiency PV / W of the composite gas cylinder (P is the gas cylinder blasting pressure, V is the volume of the cylinder, W is the weight of the cylinder), usually 20km to 25km

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