High-pressure thin-wall large-diameter extrusion oil tank

Abstract

The invention discloses a high-pressure thin-wall large-diameter extrusion oil tank which comprises an oil tank cylinder, a supporting mandrel, a piston and an end cover. One end of the oil tank cylinder of a cylindrical structure is connected with the end cover. The supporting mandrel is arranged on the central axis of the oil tank cylinder. A displacement sensor is installed in an inner cavity of the supporting mandrel and used for measuring the oil storage amount in the oil tank. The supporting mandrel is sleeved with the piston in a sealed manner. The oil tank cylinder is divided into an oil cavity and a gas cavity through the piston. The piston is provided with two Y-shaped sealing rings for isolating oil from gas and matched with the inner wall of the oil tank cylinder. The end cover is a cover body protruding outwards and is welded to the oil tank cylinder in a stepped manner. Double guidance is set for the inner ring and the outer rings of the piston so that the oil storage amount of the oil tank can be increased. Due to the fact that the outer rings of the piston are the Y-shaped rings, the capacity of the piston adapting to deformation of the cylinder is high, the sealing manner is adopted for effectively compensating for seal failure caused by deformation of the cylinder, and the oil tank has the good sealing effect when working under the conditions of high vibration and high impact magnitude.

Description

technical field [0001] The invention relates to a high-pressure, thin-walled and large-diameter extruded fuel tank, which is used in a launch vehicle servo system. Background technique [0002] In foreign high-power servo energy schemes, cold air extrusion servo energy is adopted by some models due to its relatively simple working principle and relatively low manufacturing cost, such as the Ariane 5 of the European Space Agency and the H-Ⅱ series rockets of Japan etc. Our country also adopted the cold air extrusion servo energy scheme in the energy development of the first-stage servo system of a certain solid launch vehicle. [0003] In the cold air extrusion servo energy solution, the extrusion oil tank used for energy conversion between gas and liquid is a one-time non-circulating oil tank, which can have many different forms. According to the different oil and gas isolation methods, it can be divided into free liquid surface type, capsule type, diaphragm type, bellows t...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, some fuel tanks are suitable for high-temperature gas field, and the wall thickness of the cylinder barrel of the fuel tank is relatively thick, and the end caps at both ends are connected with the cylinder barrel by bolts, and the overall weight and size are relatively large. Due to environmental constraints, it is necessary to design an extruded oil tank suitable for high pressure, normal temperature, light weight and large capacity to meet the special needs of aerospace

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