Double mechanical sealing method and double mechanical sealing device for kettle gas films

Abstract

The invention discloses a double mechanical sealing method and a double mechanical sealing device for kettle gas films, and belongs to the field of machine manufacture. The double mechanical sealing device mainly comprises a shaft sleeve, a moving-ring seat, a stationary ring, a stationary-ring press plate, a moving ring, a bearing, a stationary-ring seat, an auxiliary seal and the like. The double mechanical sealing method is characterized in that a back-to-back rotating double-end-face structure is adopted for sealing to realize non-contact operation, and a fluid dynamic-pressure groove is formed in the end face of the seal stationary ring; high-pressure isolating gas is injected between two sealing structures, and a spring is not affected by solid particles and impurities in media as not contacting with the media; the stationary ring which is supported by two O-shaped rings and is positioned by the press plate can bear back pressure; a cartridge structure is adopted. The double mechanical sealing method and the double mechanical sealing device have the advantages that an auxiliary system is simple in structure and can ensure technological media to be prevented from pollution, leakage and overflow of sealed media can be completely avoided, and no environmental pollution is caused; through the cartridge structure, accuracy, convenience and rapidness in overall mounting are realized, and demounting is facilitated. The device is applicable to various blenders, reactors, dryers, reaction kettles, polymerizers and the like in the fields of petroleum, chemical engineering, pharmacy, rubber, oil refining and the like.

Description

technical field [0001] The invention relates to a method and device for mechanical sealing of gas film double ends for kettles, which are mainly used for various agitators, reactors, dryers, reaction kettles, polymerization kettles, etc. in petroleum, chemical, pharmaceutical, rubber, oil refining and other system fields A mechanical seal belongs to the technical field of mechanical equipment manufacturing. Background technique [0002] Reactor is one of the key equipment in petrochemical, chemical fiber and pharmaceutical production. Compared with pumps and other rotating machinery, it has unique operating conditions and operating characteristics. The same, but the mechanical seal for the kettle is another system of its own due to the particularity of its working conditions. [0003] "Machinery" 1999, Volume 26, Issue 5, P23 ( figure 1 ) Inlet A must input coolant higher than medium pressure. Therefore, the mechanical seal of this mechanism must be equipped with a high-p...

AI Technical Summary

Problems solved by technology

The sealing chamber, shaft sleeve and mechanical seal assembly must be designed as a cartridge, which increases the cost

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