Bellows mechanical seal structure for petrochemical industry

Abstract

The invention discloses a corrugated pipe mechanical sealing structure for petrochemical engineering. The corrugated pipe mechanical sealing structure comprises a sealing ring head. The sealing ring head and one end of a corrugated pipe are welded and fixed, and the other end of the corrugated pipe is welded to a tail base. The sealing ring head comprises a supporting ring, an embedding base and a sealing ring piece, one end of the supporting ring is welded to the end of the corrugated pipe, two steps are arranged at the other end of the supporting ring, and the two steps comprise the inner step located inside and the outer step located outside. The embedding base is fixed to the outer step of the supporting ring, one end of the sealing ring piece is installed on the inner step, one end of the sealing ring piece makes contact with the step face, parallel to the center axis, of the inner step, the other end of the sealing ring piece is exposed out of the end face of the embedding base, the inner surface of the embedding base makes contact with the outer surface of the sealing ring piece, and the expansion coefficient of the supporting ring is larger than that of the sealing ring piece. According to the mechanical sealing structure, the mechanical sealing performance of the corrugated pipe can be effectively improved, and medium leakage is reduced.

Description

technical field [0001] The invention relates to a mechanical seal structure, in particular to a bellows mechanical seal structure for petrochemical industry. Background technique [0002] The mechanical seal is a shaft sealing device that relies on a pair or several pairs of end faces that are perpendicular to the shaft to slide relative to each other under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism, and is matched with auxiliary sealing to achieve leakage prevention. High-temperature hot oil is a relatively common medium working condition in the petrochemical field. The general temperature is 300-400 degrees. Bellows mechanical seals are usually used in this working condition. However, the current bellows mechanical seal structure is relatively simple, such as figure 1 As shown, it includes a seal ring head, which includes a metal connector for sealing with the end of the bellows, and also includes a seal ring piece ...

AI Technical Summary

Problems solved by technology

High-temperature hot oil is a relatively common medium working condition in the petrochemical field. The general temperature is 300-400 degrees. Bellows mechanical seals are usually used in this working condition. However, the current bellows mechanical seal structure is relatively simple, such as figure 1 As shown, it includes a seal ring head, which includes a metal connector for sealing with the end of the bellows, and also includes a seal ring piece located inside the metal connector, but due to the influence of high temperature hot oil, The sealing ring is easily deformed, so the sealing performance of the end face of the sealing ring is reduced, and the leakage is large, resulting in waste of materials and environmental pollution

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