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不同真空度單位的換算
理想的真空是不存在的,我們所指的真空實(shí)際上只是低于一個(gè)標(biāo)準(zhǔn)大氣壓的氣體狀態(tài),即所謂稀薄的氣體。真空度就是用來(lái)度量氣體稀薄程度的一個(gè)標(biāo)準(zhǔn),它實(shí)際上指的是氣體壓強(qiáng),壓強(qiáng)越低,真空度越高,反之越低。所以所謂真空都是指壓強(qiáng)比一個(gè)標(biāo)準(zhǔn)大氣壓小的氣體。 早期人們用毫米汞柱作為大氣壓的單位
保持真空泵真空度嚴(yán)密性的方法
水環(huán)式真空泵是用于抽吸系統(tǒng)中的氣體,然后排向周?chē)髿庖孕纬烧婵?,或抽吸周?chē)拇髿馀畔蛳到y(tǒng)之中以形成壓力的機(jī)械。
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