Carrier rocket composite storage tank provided with honeycomb sandwich walls and machining method thereof

Abstract

The invention provides a carrier rocket composite storage tank provided with honeycomb sandwich walls. The carrier rocket composite storage tank comprises a front bottom cover, a front end socket, a tank cylinder section inner wall, a tank cylinder section outer wall, a back end socket, a back bottom cover and a back bottom pool shell. The front bottom cover is connected with the front end socket. The back end socket is connected with the back bottom cover. The front end socket and the back end socket are fixed to the upper end and the lower end of the tank cylinder section correspondingly through adhesive layers. The back bottom cover is in bolt connection with the back bottom pool shell. The carrier rocket composite storage tank is characterized in that the tank cylinder section outer wall is connected with the front end socket, the back end socket and the tank cylinder section inner wall in a honeycomb manner. The invention further discloses a machining method of the carrier rocket composite storage tank provided with the honeycomb sandwich walls. According to the machining method of the carrier rocket composite storage tank provided with the honeycomb sandwich walls, the integral forming technology comprising filament winding forming, filament placement forming and cementing co-curing is adopted. According to the carrier rocket composite storage tank provided with the honeycomb sandwich walls, because the honeycomb sandwich structure is additionally arranged at the connection portions between the storage tank end socket section, the tank cylinder section inner wall and the tank cylinder section outer wall, so that the shearing strength of the carrier rocket composite storage tank provided with the honeycomb sandwich walls is improved, and the overall axle load bearing capacity of the storage tank structure is improved; and the carrier rocket composite storage tank provided with the honeycomb sandwich walls is manufactured through the forming technology comprising winding, placement and cementing co-curing, and the effects of improving the seal performance, resisting seepage, lowering the structure assembly complexity, improving the production efficiency and the like are achieved.

Description

technical field [0001] The invention relates to a storage tank for storing liquid at low temperature and a processing method thereof, in particular to a composite material storage tank for a launch vehicle with a honeycomb sandwich wall, which can replace the traditional aluminum-lithium metal storage tank. It is used in the storage of low-temperature propellant in launch vehicles, the connection of front and rear parts, and the maintenance of the complete shape of the projectile body, etc. Background technique [0002] Domestically produced liquid propellant storage tanks generally use metal materials. At present, in order to realize the overall light weight of launch vehicles, the aerospace sector uses advanced aluminum alloys such as aluminum-lithium alloys with high specific strength and high specific stiffness. [1] . The manufacturing process of metal tanks is generally as follows: a mechanically or chemically milled grid-shaped metal plate is machined and filled with ...

AI Technical Summary

Problems solved by technology

Therefore, the main defects of traditional metal storage tanks are: large structural mass, complex and diverse processes, long manufacturing cycle, and high cost

[0005] The above three processes alone have the following defects: defects of hand lay-up: low production efficiency; difficult to control product quality, poor performance stability; low fiber content in the product, poor mechanical properties

Defects of filament winding molding: winding molding has little adaptability, and products of any structural form cannot be wound; winding molding requires winding machines, mandrels, curing heating furnaces, demoulding machines and skilled technical workers, which are expensive and require high technology [3]

[0009] Aramid honeycomb has an Achilles' heel during use. When its surface layer is worn or cracks and voids appear, water and water vapor can easily enter the dense honeycomb of the structure. Under low temperature conditions, the water entering the honeycomb Solidification and expansion will naturally destroy the bonding of adjacent honeycomb spaces, and will cause a domino effect, which will eventually lead to performance degradation or even failure of the trim, which urgently needs to be repaired or replaced. Such frequent repairs will lead to high maintenance costs [6]

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