Spindle for screw press

Abstract

The invention belongs to the field of shoving machines, and concretely relates to a main shaft for a screw shoving machine. The main shaft comprises a screw shaft body and shaft heads at two ends of the screw shaft body; the screw shaft body is sequentially composed of a screw straight shaft segment and a screw cone shaft segment along a slurry traveling direction, the cone shaft axle diameter of the screw cone shaft segment increases, the thickness of a screw blade increases, the screw pitch reduces, and the external diameter keeps unchanged; the shaft head at one end of the screw straight shaft segment is the first shaft head, the shaft head at one side of the screw cone segment is the second shaft head, and the internal of the second shaft head is hollow; an internal dehydration screen drum is arranged at the large axle diameter end of the screw cone shaft segment; one end, positioned in the internal dehydration screen drum, of the second shaft head is closed, and the other end is open; and water inlet holes are arranged in the periphery of one segment, positioned in the internal dehydration screen drum, of the second shaft head, supporting baffle rings are arranged at two ends of the segment, the peripheries of the supporting baffle rings are in sealed connection with the inner wall of the internal dehydration screen drum, and the inner circumferences of the supporting baffle rings are in sealed connection with the outer wall of the second shaft head. The main shaft avoids simultaneous rotation of a slurry and the main shaft, and realizes high-efficiency dehydration and concentration of the slurry.

Description

technical field [0001] The invention relates to a main shaft for a screw squeezer, which belongs to the field of squeeze equipment. Background technique [0002] The screw press can effectively process the pulp of various feed concentrations. It mainly uses the action of mechanical pressure to compress and dehydrate the pulp under high concentration and high pressure, so as to achieve the extrusion equipment for extracting black liquor or concentrated pulp. At present, it is mainly used in the pulp and paper industry. [0003] The traditional screw press uses the screw spindle to rotate in a fixed cylindrical filter drum to make the slurry dehydrated and concentrated by being squeezed during the axial advancement in the filter drum. But in actual use, because the friction between the slurry and the screw main shaft is very large, when the friction is greater than the friction between the slurry and the filter drum, the slurry and the screw main shaft will rotate together, t...

AI Technical Summary

Problems solved by technology

But in actual use, because the friction between the slurry and the screw main shaft is very large, when the friction is greater than the friction between the slurry and the filter drum, the slurry and the screw main shaft will rotate together, thereby reducing the The dehydration effect of the slurry; and the edge of the helical blade at the end of the main shaft is easily worn, causing the edge of the helical blade to become arc-shaped. In severe cases, the diameter of the helical blade can be reduced. Excessive wear will lead to increased power consumption and sometimes block the screen hole , resulting in reduced dehydration performance or increased energy consumption

In extreme cases, due to the need to overcome friction, power consumption increases, and the transmission may be overloaded, thereby affecting the normal dehydration of the screw press

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