Labyrinth type oil seal structure of high-speed centrifugal fan

Abstract

The invention relates to a labyrinth type oil seal structure of a high-speed centrifugal fan. The labyrinth type oil seal structure comprises a gear box, a low-speed shaft large end cover, an input end sealing cover and a shaft; the low-speed shaft large end cover is fixed on the gear box through a screw, the input end sealing cover is fixed on the low-speed shaft large end cover; and the labyrinth type oil seal structure is characterized in that an oil seal structure body is arranged on the input end sealing cover, the oil seal structure body is of a labyrinth type, according to the labyrinthtype, a plurality of sealing teeth are arranged to form sealing cavities, oil return holes are formed in each sealing cavity, and a plurality of air holes are evenly distributed in the input end sealing cover so as to ensure sufficient ventilation. According to the labyrinth type oil seal structure of the high-speed centrifugal fan, the structure is simple, accumulated oil can return to the gearbox in time, the amount of leaked lubricating oil can be controlled; and long-term operation of the centrifugal fan can be guaranteed, and the effect is more remarkable especially under the high-pressure-ratio application condition.

Description

technical field [0001] The invention relates to a labyrinth oil seal structure of a high-speed centrifugal fan, in particular to a gear box applied to the blower, and belongs to the technical field of mechanical structures. Background technique [0002] In the existing technology, the key to ensure long-term operation of high-speed centrifugal fans is good lubrication. Lubricating oil leakage affects the operation of the fan, so a labyrinth oil seal device is usually installed on the shaft end cover to ensure no leakage as much as possible. On the other hand, since the sealing medium is oil mist, large particles of oil droplets are likely to remain in the expansion chamber of the lower sealing chamber during the medium leakage process. As time goes by, more and more oil droplets accumulate in the expansion chamber of the lower oil seal, which greatly reduces the volume of the expansion chamber and affects the expansion effect. According to the principle of labyrinth sealin...

AI Technical Summary

Problems solved by technology

On the other hand, since the sealing medium is oil mist, large particles of oil droplets are easily left in the expansion chamber of the lower sealing chamber during the medium leakage process

As time goes by, more and more oil droplets accumulate in the expansion chamber of the lower oil seal, which greatly reduces the volume of the expansion chamber and affects the expansion effect

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