The working principle of non-contact mechanical seal-

The working principle of non-contact mechanical seal

　2017-09-21　　

The working principle of non-contact mechanical seal:

Based on the analysis of the problems existing in the contact mechanical seal (see 1.4.4), it is known that although the common contact mechanical seal has a wide range of applications, it has its own limitations in some occasions. Based on modern hydrodynamic lubrication theory, new non-contact mechanical seals have been continuously developed. Compared with ordinary contact mechanical seals, it can achieve zero leakage or even zero escape of the sealed medium (that is, the liquid leakage and gaseous leakage of the process fluid are equal to zero), completely eliminating environmental pollution; at the same time, due to the sealing end face There is no direct solid friction and wear between them, and the service life is greatly extended, the seal reliability is significantly improved, the operation and maintenance costs are significantly reduced, and the economic benefits are significantly improved. It has been popularized and applied in various rotating fluid machinery at home and abroad.

According to the sealing principle, non-contact mechanical seals can be divided into hydrostatic mechanical seals, hydrodynamic mechanical seals and hydrodynamic and hydrostatic mechanical seals.

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