Dry gas seal device

Abstract

The invention belongs to the technical field of mechanical seals, and provides a dry gas seal device to solve the problems that when a current dry gas seal is applied to high-temperature large-amplitude vibration equipment, an auxiliary seal O-type ring of a compensation ring is likely to deform due to high temperature, and the compensation ring and an active ring are likely to rub. The dry gas seal device comprises a seal support, a pressure spring, a floating ring, a rotary shaft, a shaft sleeve and a locating pin. Bearings are arranged in the middle of the seal support, and the rotary shaft is assembled on the bearings. Spiral grooves, tables and dams are arranged on the outer wall of the shaft sleeve, and the shaft sleeve is arranged on the rotary shaft. The floating ring is located in the seal support and arranged on the shaft sleeve in a sleeving manner. One end of the floating ring and the seal support are circumferentially fixed through the locating pin, and the other end of the floating ring is connected with the pressure spring. The dry gas seal device is good in opening characteristic, high in gas film rigidity, stable in running and capable of adapting to shaft end seals of the high-temperature large-amplitude vibration equipment.

Description

technical field [0001] The invention belongs to the technical field of mechanical seals, and in particular relates to a dry gas sealing device. Background technique [0002] Flue gas turbines and gas turbines in petrochemical equipment are high-temperature, large-amplitude vibration equipment. The working environment temperature is high and the vibration amplitude during work is large. Whether the device can operate normally has attracted the attention of enterprises. At present, comb labyrinth seals are still used in high-temperature, large-amplitude vibration equipment, but because the comb-tooth labyrinth seals often cause large leakage due to excessive gaps between the comb teeth and the shaft, the seal fails. Therefore, it is necessary to find a seal with good sealing performance and Sealing device with stable system performance. [0003] As a non-contact mechanical seal, dry gas seal has been widely used in the shaft end seal of high-speed rotating equipment. like ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems that the auxiliary sealing O-ring of the compensation ring is easily deformed due to high temperature and the compensation ring and the active ring are prone to rubbing when the dry gas seal is applied to high-temperature and large-amplitude vibration equipment, the present invention proposes a dry gas seal device , the dry gas sealing device can be applied in high temperature environment, and has good opening characteristics and high air film stiffness, and can adapt to the shaft end sealing of high temperature and large amplitude vibration equipment

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