End structure of hollow fiber membrane air separator

Abstract

The invention belongs to the inerting technology of an airplane oil tank, and relates to the improvement of a hollow fiber membrane air separator end structure in an airplane oil tank inerting system. The hollow fiber membrane air separator end structure comprises a cylindrical barrel (1) and a hollow filament bundle (2) which is arranged in an inner hole of the barrel (1). The hollow fiber membrane air separator end structure is characterized by comprising a filament bundle end assembly, wherein the filament bundle end assembly consists of an epoxy resin end (4), a retainer ring (5) and a sealing ring (6). The invention provides an improvement scheme of the hollow fiber membrane air separator end structure, the requirement of the hollow filament bundle coating processing process can be met, and the research difficulty in the hollow fiber membrane air separator in China can be solved.

Description

technical field [0001] The invention belongs to the aircraft fuel tank inertization technology, and relates to the improvement of the end structure of the hollow fiber membrane air separator in the aircraft fuel tank inertization system. Background technique [0002] The function of the hollow fiber membrane air separator is to separate the nitrogen in the air for inerting the fuel tank. The end structure of a current hollow fiber membrane air separator can be found in figure 1 . It consists of a cylindrical body 1 , a hollow fiber bundle 2 located in the inner hole of the body 1 , and an epoxy resin end 3 . At the ends of the hollow fiber bundles 2, the hollow fiber filaments are bonded as a whole by epoxy resin. The inner ring surface of the epoxy resin end 3 and the end of the hollow fiber bundle 2 are bonded as a whole through epoxy resin. The disadvantage of this structure is: since the outer diameter of the epoxy resin end 3 is greater than the aperture of the cyli...

AI Technical Summary

Problems solved by technology

The disadvantage of this structure is: since the outer diameter of the epoxy resin end 3 is greater than the aperture of the cylinder body 1, and the two ends of the hollow fiber tow 2 have epoxy resin ends 3, so that the hollow fiber tow 2 is at the end The head cannot be removed from the barrel 1 after sealing

However, my country does not yet have the ability to coat hollow fiber monofilaments, and the surface coating treatment of the entire tow can only be carried out after being packaged into a hollow fiber tow.

However, the surface coating treatment method of hollow fiber monofilaments is kept secret in foreign countries, and the terminal structure of the current hollow fiber membrane air separator cannot be loaded into the cylinder 1 after the terminal is sealed first, which is not suitable for hollow fiber filaments in my country. The need for the surface coating treatment process of the beam has become a difficult problem in the development of hollow fiber membrane air separators

In addition, after the activity of the hollow fiber tow 2 disappears, only the hollow fiber membrane air separator can be replaced, causing the cylinder 1 to be scrapped and increasing the use cost

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