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时速4000公里“飞铁”曾被院士推崇 因资金问题停滞

2017-09-12 09:01:18   中国青年网

困于实验室的西南交大

自真空管道交通概念引进至今,西南交大是唯一作出模型平台的正规科研单位。

目前,西南大学真空管道磁悬浮列车项目的带头人则是前述提到的赵勇。赵勇此前在接受澎湃新闻(www.thepaper.cn)采访时曾对航天科工日前公布的时速4000公里“高速飞行列车”点评,“这项技术需要引起社会的关注。此时公布不是说这个技术已经成熟了,而是需要产业部门介入,国家政府要有投入,把前期技术先开发出来。”

赵勇是中国高温超导领域的第一个博士,辗转意大利、澳大利和日本13年后,他回到西南交通大学,是国家首批外籍杰出青年基金获得者。彼时的赵勇认为,“西南交大是最适合搞超导磁浮研究的地方”。

赵勇透露,“航天科工目前的整个方案、基本思路就是按照我们的书(编注:《速车系统概论》)提出来,具体关于磁浮方面的设计是我们来帮助完成。”只不过,具备多年实验经验的赵勇对时速4000公里持相对谨慎的态度,“我一直在强调1000公里时速这个第一步的关键性和重要性,当你1000公里时速还没实现的时候,大谈4000公里时速意义就不大。”

赵勇认为,要实现“高速飞行列车”没有捷径,必须从实验室走向中试,再进入工程阶段。“我们现在连实验室的数据还没拿出来,离这个远景还很远。”

2011年,赵勇团队研制出全球首个真空管道高温超导磁浮列车试验系统,该系统轨道直径3米,管道最低压强2000帕,磁浮车采用线性电机驱动。目前,这第一代实验模型已被拆除。2016年1月,赵勇团队完成第二代真空管道高温超导磁浮列车系统的建设,系统首次采用“壁挂”式运行,即将直径6.5m的环形轨道铺设在环形金属壁面上,使磁浮车沿壁面高速行驶。

2016年5月,系统完成第一阶段调试,时速达到108公里;2016年10月,系统完成第二阶段调试,时速达到150公里。赵勇对澎湃新闻表示,“目前,我们实验室在高温超导磁浮方面能做到时速160公里,这应该是实验室最高速度了。”

实验室系统的难点在于,“场地有限,只能做成环形,环形的小半径离心力很大,做起来非常困难。”这也就意味着,赵勇团队若想再进一步,必须将实验搬到户外。

“户外实验首先需要场地,起码要1公里或者2公里的管道做前期试验,中试起码要几十公里,日本600公里时速的磁浮线有三十多公里的线,按照这个比例的话,50到100公里的中试线是需要的”。

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