| 摘要 |
<p>A missile bulkhead rupture disc assembly (10) for disposition between adjacent solid propellant stages (14,16) which are ignited in sequential order has a central aperture (40) which receives an igniter for detonating the first stage of propellant. In preferred forms, the rupture disc comprises a prebulged frangible element (34) having a first burst pattern with a circular line of weakness (37) circumscribing a central portion of the element surrounding the igniter, and the element also has a second burst pattern (44) comprising a plurality of lines of weakness which extend in a radial direction outwardly from the circular line of weakness of the first burst pattern, and which are spaced from each other to define generally sector-shaped petals or segments (46) of the frangible element. After ignition of the second stage (16) of propellant, the frangible element (34) initially bursts along the circular weakness line of the first burst pattern and thereafter ruptures along the radially extending lines of the second burst pattern to enable simultaneous, non-fragmenting outward movement of each of the segments toward the casing of the missile so that the materials discharged from the second propellant stage can be immediately directed to the tail end of the missile. Advantageously, the circular weakness line (37) of the first burst pattern is scored to a depth deeper than a depth of score of the weakness lines of the second burst pattern (44) to ensure that the segments (46) completely break away from the central portion before shifting outwardly toward the wall of the casing. Thereafter, the central portion of the frangible element and the adjacent igniter remain in stationary disposition in the center of the missile while the exhausting gases are discharged uniformly around the igniter.</p> |
