小中大机械泵漏油问题!
以下是爱德华兹机械泵关于漏油的FAQ,请参考:
When dealing with vacuum leaks, you must first determine if the leak is a "Real" or "Virtual" leak. A real leak is one that is coming into the vacuum chamber from an outside source. A virtual leak is a gas load evolving from inside the vacuum system from outgassing. Outgassing comes from any liquid (water, solvents, etc.) that is vaporizing inside the vacuum chamber either off the chamber walls or out of a product/substance placed into the vacuum chamber for processing. A simple means of determining if you have a real or virtual leak is to do a "rate of rise test". To begin, simply reduce the pressure in the vacuum chamber to its' maximum obtainable vacuum level. With a calibrated/highly accurate Torr gauge, measure the rise in pressure over time in the chamber. If the pressure eventually rises to atmospheric pressure, then the leak is real. If the pressure rises and stops at some pressure below atmospheric in a 24 hour period, then the leak is virtual.
因此,您所说的漏油应属于第二种情况,即“Virtual leak”,不必别担心。根据我们的经验,机械泵长时间工作时,泵体温度会升高,也会加快“Virtual leak ”,所以在质谱的运行环境最好控制在18-25度。另一个简单检测泵体温度过高的方法是查看泵体上的硬标签(好像是黄颜色的)是否可以滑动,如果是的话,说明泵体温度过高,最好在泵的周围加一个风扇,我的实验室放置了一个呵