每日一笑081026? A small boy leading a donkey passed by an Army camp. A couple of soldiers wanted to have some fun with the lad. "What are you holding onto your brother so tight for, sonny?" asked one of them. "So he won't join the army," the youngster replied without blinking an eye. 一个小男孩牵着头驴子穿过部队营房。两名士兵想跟小家伙开个玩笑:“小孩,你把你哥哥牵得这么紧干什么?” “这样,他就不会去参军了。”小家伙眼都不眨地回答道。查看更多1个回答 . 4人已关注
帮忙看下这个压缩机的工作原理,谢谢~~? 厂家的 压缩机 动画在国外,视频下不下来,看结构感觉是离心式压缩机。想问下大神这种压缩机的类型,以及详细的工作原理。压缩机是periflow的,隶属于Howden。下面是描述,但是没有说明中间的core部件是干啥的~~?? A profiled impeller wheel revolves within an annular channel, and the action imparts a swirling helical flow to the process gas. The helical route means the gas passes through the blades several times. The corkscrew movement has both tangential and circulatory flow components. Tangential flow tends to govern the volume of flow, and the circulatory movement largely determines the pressure, so each Periflow® compressor can be custom designed to deliver the precise performance required. In a single revolution, the Periflow® process produces a degree of compression equivalent to several centrifugal compressor stages. 查看更多5个回答 . 2人已关注