Deep groove belt dynamic pressure type end face mechanical sealing structure

Abstract

A deep groove belt dynamic pressure type end face mechanical sealing structure comprises a dynamic ring and a static ring, wherein the dynamic ring and the static ring are sealed in a mechanical mode, one side of the end face of the dynamic ring and one side of the end face of the static ring are high-pressure sides, namely upstream portions, the other side of the end face of the dynamic ring and the other side of the end face of the static ring are low-pressure sides, namely downstream portions, one end face of the dynamic ring or the static ring is provided with a dynamic pressure groove and a groove ring throttling groove, the dynamic pressure groove and the groove ring throttling groove are symmetrically distributed according to the rotation center, the dynamic pressure groove is arranged in the upstream portion of the end face, the deep ring throttling groove is formed in the tail end of the downstream portion of the dynamic pressure groove, the deep ring throttling groove is formed due to concentrically and intensively distribution of two or more annular deep grooves in the radial direction, a first annular sealing dam with a smooth plane is arranged between the dynamic pressure groove and the deep ring throttling groove, and a second annular sealing dam with a smooth plane is arranged between the inner diameter of the deep ring throttling groove and the inner diameter of the sealing ring.

Description

(1) Technical field [0001] The invention belongs to the technical field of end face mechanical seal structure design, in particular to a shaft end seal device suitable for rotating shafts of various compressors, pumps and kettles, and in particular to a dynamic pressure type end face mechanical seal structure of a deep link flow groove. (2) Background technology [0002] Mechanical seals are the main means to prevent shaft end leakage of rotary fluid machinery. With the continuous expansion of operating conditions in industries such as petroleum, petrochemical and nuclear power generation, mechanical seals are required to have higher stability, reliability and longer service life. And strictly control the leakage of medium fluid. The existing non-contact mechanical seals with spiral groove and other groove end faces have been widely used in shaft end sealing devices of centrifugal compressors and pump shafts due to their characteristics of non-contact and low wear. However,...

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Problems solved by technology

[0003] In order to overcome the problem of high leakage rate of the existing dynamic pressure type end face seal, the present invention provides a medium that can be applied to various conditions, utilizes the throttling effect of the deep link flow groove structure, enhances the damping effect of the seal end face, and reduces the leakage rate Non-contact mechanical face seal structure

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