Mechanical seal system-impurity removal system-

Mechanical seal system-impurity removal system

　2019-04-08　　

Mechanical seal system-impurity removal system:

The sealed medium often contains solid particles, easy crystallization, coking and other media in the medium itself (such as slurry, oil slurry, etc.), and solid particles appear under certain working conditions. There are also some special-purpose pump seals (such as The mechanical seal of the bottom pump and the bottom pump) in the system has residue, rust, dirt, and even residual debris during installation, which will bring difficulties to the mechanical seal. Mechanical seal of sand mill

Solid particles entering between the mechanical sealing surfaces will scratch the sealing surface, and fibrous materials entering the seal will also destroy the liquid film between the sealing surfaces. The solid impurities deposited on the auxiliary seals of the moving and static rings will affect the floatability of the seal ring, causing the phenomenon of 'seal sheddingTherefore, we must try to remove the impurities in the sealed medium. Normally, an impurity removal system can be used.

At present, there are three commonly used solid impurity removal systems, namely, external flushing between the main and auxiliary seals, external separator impurity sealing liquid extraction, and external separator impurity sealing liquid population, respectively, as shown in Figure 6-11 (a ), (b), (c). Figure (a) shows that the external cleaning fluid is hit between the main and secondary seals, usually with clean water, and if necessary, use a compatible sealing fluid. Figures (b) and (c) show the liquid supply system of the shaft seal box after the outlet flushing liquid is passed through an external separator to remove impurities (to be precise, to reduce solid impurities). Figure (b) shows the separation The impurity-containing sealing liquid is extracted by the filter; Figure (c) shows the impurity-containing sealing liquid returning to the pump inlet recovery system.

Figure 6-11 Commonly used solid impurities removal system

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