Corrugated pipe type dry gas seal device and seal method

Abstract

The invention discloses a corrugated pipe type dry gas seal device and seal method. The corrugated pipe type dry gas seal device comprises a stationary component, a rotating component, a shaft, an inner corrugated pipe, an outer corrugated pipe and a casing, wherein the stationary component is fixed with the casing together through a positioning block; the rotating component is fixed to the shaft through a nut and rotates with the rotating of the shaft; and the inner corrugated pipe can perform the function of a spring but has a better effect than the spring. The corrugated pipe type dry gas seal device adopting the corrugated pipes works in various environments and cannot affect the rigidity of the corrugated pipes under the conditions of high temperature and strong corrosion. The corrugated pipe type dry gas seal device is reasonable in design, skillful in structure, great in seal effect, low in energy consumption, low in equipment investment, stable in running and low in accident occurring rate and nearly reaches no linkage at the shaft end.

Description

technical field [0001] The invention relates to a mechanical sealing device, in particular to a bellows type dry gas sealing device and a sealing method. Background technique [0002] The dry gas seal belongs to the non-contact seal in the mechanical seal. The sealing effect is good, almost reaching no leakage at the shaft end; the energy consumption is small, only about 5% of other types of mechanical seals; the pollution and waste of oil are reduced, and the sealing Most of the gas is nitrogen, which has no pollution to the oil, and the entrained oil can be reused after being separated by the separator; the equipment investment is reduced, and only a sealed gas source is required; the service life is long. The air film makes there is almost no wear between the static ring and the moving ring; the operation is stable and the incidence of accidents is reduced. The elastic elements used are mainly springs. When the working conditions of the dry gas seal are high temperature ...

AI Technical Summary

Problems solved by technology

The elastic elements used are mainly springs. When the working conditions of the dry gas seal are high temperature and strong corrosion, the stiffness of the spring will be affected and it will be extremely unstable, which will directly affect the sealing effect.

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