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长征五号总师揭秘起飞前惊魂163分钟(图)

2017-05-28 18:51:49   中国网

原标题:“小鲜肉”团队把“胖五”送上天,总师揭秘长征五号起飞前惊魂163分钟

5月27日,长征五号总设计师李东在京西宾馆捧起了全国创新争先团队奖。他不是一个人在战斗,而代表着中国航天科技集团公司一院的长征五号运载火箭研制团队。

正是这支平均年龄不到33岁的“小鲜肉”团队,通过十年的默默奉献和艰苦攻关,将长征五号火箭送入太空,铸就了我国运载火箭升级换代的里程碑。

首飞“惊魂”彰显自信

2016年11月3日傍晚,长征五号运载火箭伫立在中国文昌航天发射场101工位。按计划,它将在当晚18时左右实施首飞。

谁也想不到,这个夜晚会如此惊魂,让亲历者永生难忘。

发射准备阶段,第一个插曲来自火箭助推器氧排气管道。经过现场研究排查,发射窗口被推迟到19点01分。

然而,新的问题接踵而至:芯一级氢氧发动机在预冷过程中,氢泵轴承处的温度没有达到起飞标准。

“芯级里液氢容积非常大,必须保证发动机一些部件的温度冷却到足够低,启动过程中才能确保平稳。”长征五号副总设计师娄路亮后来解释说。

现场专家和研制团队锁进会议室,紧急展开商议。李东却很从容。他表示,发动机预冷问题事先反复讨论过多次,在合练中也单独做过试验,因此有预案准备。

20多分钟后,团队拿出了预案范畴内的解决方案。已经撤退到安置点的陈通斌、谢建明等4位芯一级氦配气台操作手受命返回塔架,迅速对供气设备进行操作。19点30分左右,发动机预冷问题圆满解决,发射时间则被推迟到20点40分。

时间在众人等待中流逝。20点37分,01号指挥员下达口令:“3分钟准备!”但命令很快被相关操作人员暂停,点火再次延后。接下来,指令几度被暂停、重置。

当“1分钟准备”指令再次被叫停,“长五”总体主任设计师何巍表情严峻,连问:“怎么了?怎么了?”操作人员面面相觑,很多人站了起来。负责控制系统的“长五”副总设计师李学锋也忍不住起身,抢到前排查看数据。

接下来,出现了中国航天史上罕见的一幕。进入倒计时10秒后,读秒又被中断。

然而,李东和“长五”总指挥王珏仍坐在原地,静观事态发展。“我们的一线人员都是专业人士,他们很清楚各自负责的工作。对长征五号和我们的团队,我有信心。”李东说。

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