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一、概述 (一)粘性密封的基本原理和优缺点粘性密封也称螺旋密封。它的基本原理是,在旋转轴与静止壳体之间有一狭小间隙,其间充有粘性流体,在轴或壳体上(或者同时在两者上)刻有螺旋槽;当轴旋转时,由于螺旋槽对粘性流体的泵汲作用而建立起一个密封压力,该压力与被密封流体的压力相平衡,从而防止了泄漏。当装置内的被密封流体为高压液体时,则该液体本身即可作为密封流体(图1),当装置内为正压或负压气体时,则可从
First, an overview (a) of the basic principles and advantages of sticky seal sticky seal, also known as screw seal. Its basic principle is that there is a small gap between the rotating shaft and the stationary housing, filled with a viscous fluid therebetween, and helical grooves are engraved on the shaft or the housing (or both); when the shaft rotates, The helical groove creates a seal pressure against the viscous fluid pumping action, which is balanced with the pressure of the sealed fluid to prevent leakage. When the sealed fluid in the device is a high-pressure liquid, the liquid itself can be used as a sealed fluid (Figure 1). When the device is a positive pressure or negative pressure gas,