论文部分内容阅读
1986年1月28日美国“挑战者”号航天飞机爆炸事故已列为1986年世界十大新闻之一。分析表明,这次事故是由于助推器连接处的环形密封圈低温变形失去密封性使燃料泄漏所致。助推器的接缝位于火箭的四个燃料箱之间。当点火时,燃烧燃料的压力使各箱间的接缝开裂达0.076厘米。为使3300℃高温气体不致泄漏,接缝处填以封泥和橡胶环形密封圈。燃料箱的外壳彼此结合成一个Y形连接并用金属螺栓固定。当火箭点火时,燃烧燃料作用在封泥上的压力迫使环形密封
January 28, 1986 US “Challenger” space shuttle explosion has been listed as one of the world’s top ten news stories in 1986. The analysis shows that the accident was caused by the leakage of fuel due to the low temperature deformation of the annular seal ring at the booster connection. Booster seams are located between the rocket’s four fuel tanks. When ignited, the pressure of the burning fuel cracked the joint between the boxes by 0.076 cm. In order to 3300 ℃ high temperature gas will not leak, filled with sealing seams and rubber ring seal. The tanks of the fuel tank are combined with each other into a Y-shaped connection and fixed with metal bolts. When the rocket ignites, the pressure exerted by the burning fuel on the seal forces the annular seal