| 摘要 |
A jet propulsion system having a pressure vessel is provided to prevent an elastic body for absorbing deformation of the pressure vessel from being directly exposed to high pressure gas such that the elastic body is prevented from being damaged by high pressure gas. A jet propulsion system includes a pressure vessel(10), a front dome(12), a cap(14), a cylinder(18), and an elasticity providing unit(20). The pressure vessel is filled with a propellant. The front dome is mounted on an inner surface of the pressure vessel, and has a path(30) for passage of high pressure gas. The cap is mounted on the path of the front dome such that the cap is separated from the path when the internal pressure of the pressure vessel reaches a level higher than a preset level. The cylinder is arranged in an opening(16) of the pressure vessel, and guides the high pressure gas to the outside. The elasticity providing unit is interposed between the cylinder and the front dome, and prevents the pressure vessel and the front dome from being damaged by the internal pressure of the pressure vessel. The elasticity providing unit includes an outer member(24) fixed at one end of the cylinder, an inner member(22) fixed at one end of the front dome, and an elastic body(26) interposed between an inner surface of the outer member and an outer member of the inner member such that the elastic body is prevented from directly contacting high pressure gas.
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