Bar mill roller system sealing device

Abstract

The invention relates to a bar mill roller system sealing device comprising a sealing pair arranged on the shaft shoulder of the inner side of a roller, and the sealing pair consists of a labyrinth ring with an annular tang and a labyrinth cover spliced with the tang. The bar mill roller system sealing device is characterized in that the excircle surface in the splicing direction of the labyrinth cover and the labyrinth ring is provided with a plurality of annular grooves to form a labyrinth type gap seal. The invention has the advantages that the annular grooves on the end surface of the labyrinth ring are modified into one annular groove to form two seal gaps, which enables the annular groove on the end of the labyrinth ring to be widened by several times, therefore, the processing is simple and the processing precision is increased. The annular groove arranged on the excircle surface of the labyrinth ring can form linear speed difference so as to enhance the water throwing ability of the labyrinth ring; in addition, the labyrinth cover is provided with drain holes, small part of water penetrating into the cover can be discharged out of the sealing device in time, thereby effectively preventing roller cooling water from flowing into a roller bearing seat to corrode the bearing, and prolonging the maintenance cycle of the rolling mill.

Description

technical field [0001] The invention belongs to rolling mills, in particular to a roll system sealing device of a bar rolling mill. Background technique [0002] The sealing device of the bar rolling mill is composed of a labyrinth cover and a labyrinth ring. There are two annular grooves on the labyrinth ring. Four sealing platforms are formed on the outside of the labyrinth cover. Inserting into the end face of the seal ring forms a ring-shaped seal. Ring labyrinth seal. The purpose is to avoid bringing the cooling water of the cooling roll into the bearing of the chock. Due to the installation of four sealing rings, the end face of the sealing ring that is inserted into it is deepened. The groove width is only 3.5mm, but the groove depth is 33mm. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art, and to provide a sealing device for the roll system of a bar mill, which changes the annular groove on ...

AI Technical Summary

Problems solved by technology

Due to the installation of four sealing rings, the end face of the sealing ring that is inserted into it is deepened. The groove width is only 3.5mm, but the groove depth is 33mm. The processing of the end face seam is difficult and the precision is poor, resulting in the sealing of the sealing pair.

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