Novel shaft-end sealing structure of concrete mixer

Abstract

The invention discloses a novel shaft-end sealing structure of a concrete mixer. A movable sealing ring sleeved on a mixing shaft is arranged on a portion, which is located on the inner side of a mixing barrel, of the mixing shaft, a fixed sealing ring sleeved on the mixing shaft is arranged on the mixing barrel, the movable sealing ring and the fixed sealing ring are pressed by a spring which is arranged on the mixing shaft or the mixing barrel and axially stretches and retracts on the mixing shaft, so that an end surface of the movable sealing ring hermetically contacts with an end surface of the fixed sealing ring, and both end surfaces, which contact with each other, of the movable sealing ring and the fixed sealing ring are located on the inner side of the mixing barrel. As the movable sealing ring and the fixed sealing ring are pressed by the spring so that surface contact sealing is formed, the sealing contact surfaces are located in the mixing barrel, sand in the mixing barrel cannot enter a portion, which is connected with the mixing barrel, of the mixing shaft and a portion which is located out of the mixing barrel, and a sealing effect is good.

Description

technical field [0001] The invention relates to a shaft end sealing structure of a concrete mixer. Background technique [0002] Concrete mixer (hereinafter referred to as mixer) is an essential equipment for concrete mixing, among which horizontal shaft concrete mixer is the most widely used and most used mixing equipment at home and abroad. It has the advantages of good mixing quality, high production efficiency, advanced performance and reliable use. However, the mixing shaft and the shaft end of the horizontal shaft mixer have been buried in the concrete during work, so the reliability and service life of the shaft end seal have always been a key issue for the horizontal shaft mixer, and it is also a technology that has been difficult to solve in the mixer industry. problem. [0003] At present, in the horizontal shaft type shaft end seals at home and abroad, there are generally a pair of shaft end seal protection rings near the inner cavity of the mixing drum, one of ...

AI Technical Summary

Problems solved by technology

[0004] Because there is a gap in the protective ring, the mortar can easily enter the shaft end through the gap, and once the mortar enters the shaft end, it will soon wear out the sealing rubber ring at the shaft end and cause slurry leakage. Therefore, this shaft end sealing technology is not reliable enough. shorter lifespan

Images