Theinvestigation showed that low temperatures on the day of the launch caused arubber “O-ring” seal on one of the rocket boosters to fail, which led to a leakof explosive gases.
调查显示，挑战者号发射当日低温，导致火箭推进器上橡胶O行环密封圈失效，进而引起爆炸性气体泄露。
2
There have been two failures: The shuttle Challenger and seven astronauts were lost just after launch in January 1986 due to an O-ringseal leak in a solid rocket booster that led to an explosion.
The design calculation of the large Oring rubber self energized seal (without bolt and nut )used for the vacuum equipment and its application results are introduced.