Labyrinth type axle head sealing device

Abstract

The invention relates to a labyrinth-typed shaft end sealing device used for a concrete mixing host machine. The device comprises a mixing shaft, a first grease filling hole, a second grease filling hole, a fixed ring hub, a rotary ring hub, a positioning pin, a shaft sleeve, a protection retaining plate, a retaining ring, a first floating sealing ring, a second floating sealing ring, a first O-shaped sealing ring, a second O-shaped ring, a first frame oil seal, a washer, a second frame oil seal, a bearing seat, a supporting centering bearing, a bearing retaining plate and a bearing end cover; the rotary ring hub is rotatablely matched with the fixed ring hub; one end of the rotary ring hub is processed with a U-shaped ring trough; the retaining ring is provided with a cirque flange; the rotary ring hub is tightly pressed with the retaining ring; the other end of the rotary ring hub is tightly contacted with the first O-shaped sealing ring and the first floating sealing ring; the rotary ring hub is connected with the shaft sleeve and the mixing shaft by the positioning pin. The device can effectively prevent the mortar entering the shaft end part of the mixing shaft, solves the slurry leakage and abrasion problems of the mixing shaft end, and further protects the mixing shaft to support the centering bearing.

Description

technical field [0001] The invention relates to a sealing device, in particular to a shaft end sealing device on a mixing main machine of a concrete mixing station. Background technique [0002] At present, the shaft end seal of the mixing main engine used in the concrete mixing station mostly adopts a mechanical seal. For example, the Chinese utility model patent with the publication number CN87204871U discloses a shaft end sealing device of a horizontal shaft type mortar mixer. The device adopts a floating oil seal (comprising a pair of The floating ring and a pair of "O" type rubber rings), the oil channel and the sealing gasket are composed of two floating rings respectively connected with the movable hub and the fixed hub, and the cones between the floating ring and the movable hub and the fixed hub are respectively Install an "O" type rubber ring, and the oil passage directly leads to the floating ring. However, due to the fluidity of the mortar and the positive press...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings that the existing shaft end seals cannot sufficiently prevent mortar intrusion and cause slurry leakage at the shaft end and damage to the supporting self-aligning bearing, the present invention provides a labyrinth type shaft end sealing device, which can not only effectively prevent mortar intrusion, but also solve the problem of shaft end sealing. The problem of grout leakage at the end, and it can also prevent the retaining ring from loosening due to concrete wear and tear on the retaining ring and screws

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