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石家庄兴耀真空泵科技有限公司

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第一台真空泵系统的发明

编辑:石家庄兴耀真空泵科技有限公司时间:2016-06-29

足彩澳门即时盘DIYITAIZHENKONGBENGXITONGDEFAMING

    真空泵系统是托里拆利用汞柱倒置的方法使玻璃管的上方出现真空.人们称之为托里拆利真空.可以说这是最早获得真空的方法。他的发现传开后,人们又做了许多实验来研究这个现象。例如,1647年有一位法国物理学家叫罗伯维尔(G. Robenval ),做了一个有趣的实验,他从鲤鱼肚里取出鱼缥,尽可能将里面空气排尽,再把开口扎紧,放在托里拆利真空区内。结果鱼缥膨胀起来。这个实验令人信服地说明了,大气压下留在鱼缥中的残余空气,当外部气压减小到零时,会膨胀为很大的体积。不久有人著书评述了这个实验,认为空气具有弹性,就好像海绵或羊毛一样,受到压力会收缩,压力减轻会膨胀。

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