Two-step forming method for designing and manufacturing composite material gas cylinder and application of method

Abstract

The invention relates to a two-step forming method for designing and manufacturing a composite material gas cylinder and an application of the method, and belongs to the design and manufacture field of pressure containers. The two-step forming method comprises the following steps: decompressing a designed work pressure P of the gas cylinder into a basic work pressure P and an additional work pressure P; carrying out first-step processing forming on the gas cylinder according to the basic P and the additional P respectively, wherein the self-tightening operation of the gas cylinder is completed during the first-step processing forming process; then carrying out second-step winding and curing processing, and properly adjusting the maximum temperature during curing so as to obtain a final forming product. The using amount of an aluminum alloy material as a lining is reduced, and the structural weight is optimized; the self-tightening pressure of the gas cylinder is reduced, and the fracture rate of fiber and resin during the self-tightening process is reduced, and thus the total mechanical property of the gas cylinder is ensured. Moreover, the bearing load of related equipment is reduced, and the service life is prolonged.

Description

technical field [0001] The invention relates to the forming and application of a high-pressure gas cylinder with fiber fully wound metal liner, especially the forming of a high-pressure gas cylinder of 35 MPa and above, belonging to the field of pressure vessel design and manufacture. Background technique [0002] In China, in the field of design and manufacture of composite material high-pressure gas cylinders, relevant patented technologies and documents are generally applicable to the design and manufacture of gas cylinders of 30MPa and below, such as the 03150968.1 "composite material pressure vessel invented by Zheng Chuanxiang and Cao Kun of Zhejiang University. ", 200510010151.6 "Large-sized, ultra-thin metal-lined composite pressure vessel and its manufacturing method" invented by He Xiaodong and Wang Rongguo of Harbin Institute of Technology, etc. According to the Clapeyron equation in classical thermodynamics, for a high-pressure cylinder with a certain volu...

AI Technical Summary

Problems solved by technology

However, if the filling medium is compressed hydrogen, the working pressure is generally 35MPa, 70MPa and above. If the one-time curing molding technology is still used, the amount of materials will increase accordingly, such as the increase of the wall thickness of the liner and the thickening of the layer, etc. The self-tightening pressure in the production process is correspondingly high, and the load and energy consumption of related equipment also increase accordingly

In addition, for a thicker composite layer, if the one-time winding curing process is adopted, the higher self-tightening pressure will definitely aggravate the cracks, which will lead to a decrease in the overall mechanical properties of the composite layer.