A dynamic and static pressure type columnar asperity waviness distribution mechanical seal structure

Abstract

The invention provides a dynamic and static pressure type columnar micro-bulge waviness distribution mechanical seal structure. The mechanical seal structure comprises a dynamic ring and a static ring which are mechanically sealed, the dynamic ring and the static ring are provided with one or more sealing end faces, the upstream side of each seaming end face is provided with a columnar micro-bulge mechanism (5), the downstream side of each sealing end face is provided with an annular sealing dam (4), and the end face of each sealing dam is a smooth surface; each columnar micro-bulge mechanism (5) is provided with wave crests (1) and wave troughs (2) at equal intervals, the wave crests (1) are located on the diameters of the sealing end faces, the wave troughs (2) extend towards the high pressure sides of the upstream sealing end faces from the downstream annular sealing dams (4) and are gradually widened and deepened, and the wave troughs (2) are in conical shapes.

Description

technical field [0001] The invention relates to a shaft end sealing structure of a rotary fluid machine, in particular to a dynamic and static pressure type columnar asperity distribution mechanical seal structure, which is suitable for the shaft end of a medium-high temperature liquid medium rotating machine containing a certain amount of solid abrasive seal. Background technique [0002] The mechanical seal is a key component to prevent the leakage of the rotary mechanical shaft end. It is widely used in the fields of petroleum, petrochemical, chemical, pharmaceutical and electric power due to its significant performance advantages such as low leakage, low power consumption and long life. With the rapid development of the above industries, mechanical seals are required to develop towards high parameters, integration and intelligence, and to be able to adapt to diversified environments. However, as far as ordinary liquid lubricated mechanical seals include the existing wav...

AI Technical Summary

Problems solved by technology

However, as far as ordinary liquid lubricated mechanical seals include the existing waviness end face mechanical seals, upstream pumping mechanical seals and microporous end face seals, contact friction between the moving ring and the static ring is prone to occur during the seal start-stop phase and low-speed operation. Wear and tear will not only cause serious wear on the end face, but also the frictional heat generated by the relative sliding of the dynamic and static rings will cause deformation of the end face. Fluid-lubricated mechanical seals: In high-temperature and high-pressure environments, ordinary fluid-lubricated mechanical seals are prone to deformation of the end face, thereby destroying the stability of the seal operation, increasing leakage, and even causing failures

Similarly, ordinary mechanical seals are also difficult to apply to the working conditions with solid particles in the medium. Solid particles enter the sealing end face and act as abrasives, causing severe wear and tear of the seal to fail.

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