Labyrinth seal structure used for bearing pedestal

Abstract

The invention relates to a labyrinth seal structure used for a bearing pedestal. The bearing pedestal is used for rotation movement of a main shaft. The labyrinth seal structure comprises a movable ring, an oil scraper plate and a labyrinth static ring; the movable ring is fixed to the main shaft; the oil scraper plate is fixed to the peripheral face of the movable ring; a sealing lip is arranged on one side of the movable ring; the sealing lip and the oil scraper plate abut against the outer surface of an outer blocking ring of the bearing pedestal; the oil scraper plate is fixed to the movable ring; the labyrinth static ring is fixed to the outer blocking ring of the bearing pedestal and internally provided with a static ring isolation tooth; and an oil drain hole is formed in the lower end of the labyrinth static ring. The airtightness of the labyrinth seal structure is improved, and the situation that much lubricating grease inside the bearing pedestal is leaked so as to affect normal operation of the bearing pedestal is prevented; as the static ring isolation tooth is arranged inside the labyrinth static ring, direct overflowing of the grease from the static ring is further avoided, the grease is not thrown around along with the shaft, and cleanliness of a machine body is ensured; and the oil drain hole can drain a small amount of leaked grease to an oil collection box, so that the functions of directional collection and recycling are achieved.

Description

technical field [0001] The invention relates to mechanical seal technology, in particular to a labyrinth seal structure for a bearing seat. Background technique [0002] The labyrinth seal is to set a number of annular sealing teeth arranged in sequence around the rotating shaft. A series of cut-off gaps and expansion cavities are formed between the teeth. To achieve the purpose of leak prevention. Due to its simple structure, no friction, simple maintenance and reliable operation, labyrinth seals are widely used in the main shaft bearing housings of rotary compressors, blowers and steam turbines and other power machinery. [0003] However, most of the existing labyrinth sealing structures have the following problems: [0004] (1) The sealing performance of the grease-lubricated bearing seat is not strong, and a large amount of grease leakage will affect the safe operation of the bearing on the main shaft; [0005] (2) The leaked grease will be thrown around with the rota...

AI Technical Summary

Problems solved by technology

[0004] (1) The sealing performance of the grease-lubricated bearing seat is not strong, and a large amount of grease leakage will affect the safe operation of the bearing on the main shaft;

[0005] (2)

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