Rotor sealing structure of internal mixer

Abstract

The invention belongs to the technical field of mechanical equipment sealing, and particularly relates to a rotor sealing structure of an internal mixer. The main structure of the rotor sealing structure comprises a rotor shaft, a side wall, a rotor, a gap, a rotor working end face and a spiral groove. The spiral sealing principle is applied to the gap sealing between the rotor working end face and the side wall of a mixing chamber, and materials in the gap is conveyed back to the mixing chamber through a spiral groove on the rotor working end face, so that the leakage of the materials is prevented; and the sealing of high-viscosity polymer melt materials is carried out, and specifically the spiral groove is processed on the rotor working end face, wherein the rotation direction of the spiral groove is opposite to the rotation direction of the rotor shaft. When the rotor working end face rotates clockwise, the rotation direction of the spiral groove is anticlockwise; when the rotor working end face rotates anticlockwise, the rotation direction of the spiral groove is clockwise, the spiral groove drives the materials to move, a pumping effect is generated, and the materials are conveyed back to the mixing chamber; and when the materials conveyed by the spiral groove and the materials leaked from the gap are balanced, the dynamic sealing is realized.

Description

Technical field: [0001] The invention belongs to the technical field of mechanical equipment sealing, and specifically relates to a rotor sealing structure of an internal mixer, which introduces a spiral groove seal into the rotor seal in a mixing chamber, and realizes the sealing of rubber material from the source through the pumping action of the spiral groove. Background technique: [0002] The internal mixer is the key equipment for rubber mixing production. In the process from raw material (raw rubber) to finished product, mixing is the first process, which plays an extremely important role and is the most critical step in rubber modification. Whether the mixing is uniform or not determines the effect of the subsequent process, and affects the product performance and service life to a large extent. In all rubber (plastic) product industries, the internal mixer is an important production equipment, whether it can work safely, normally and smoothly directly affects whethe...

AI Technical Summary

Problems solved by technology

There are two disadvantages in the traditional internal mixer rotor sealing device: one is that they are all located outside the mixing chamber; the other is that they are greatly affected by external factors. material leakage

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