Spiral stirrer of vertical type spiral stirring grind

Abstract

The invention relates to a spiral stirrer of a vertical type spiral stirring grind. The spiral stirrer is characterized by being provided with a transmission shaft, and the circumference surface of the transmission shaft is provided with a spiral twined spiral supporting plate; the spiral supporting plate is provided with a spiral lining plate the shape of which is same with the twined shape, the width of the spiral lining plate is greater than the spiral supporting plate, and a half of the spiral supporting plate is packaged in the spiral lining plate; the spiral lining plate takes the spiral middle diameter as a boundary, the included angle of the normal fracture surface upper boundary and the horizontal surface is 2-3 degrees in the inner side of the spiral middle diameter, the included angle of the normal fracture surface upper boundary and a horizontal surface is 8-12 degrees in the outer side of the spiral middle diameter, the spiral lifting angle at a middle diameter position is 25-35 degrees, and the spiral height-diameter ratio is 1.0-1.1. The spiral stirrer provided by the invention has the advantages that a specific structure of the spiral supporting plate and the spiral lining plate is adopted, a grinding material and a grinding medium are fully dispersed and contacted, the full turbulent motion is generated, a slurry stream fluid microvitum has the stable Lagrange streamline motion trail, and the grinding efficiency of a stirring grind machine is high.

Description

technical field [0001] The invention relates to a spiral stirrer, in particular to a spiral stirrer for a vertical spiral stirring mill. Background technique [0002] The screw agitator is a device that converts the electric energy of the motor into the mechanical energy received by the material, so it is widely used in the power system of industrial equipment such as vertical spiral stirring mills, stirring tanks and screw conveyors. Among them, the vertical spiral stirring mill makes use of the stirring effect of the spiral stirrer to make the grinding medium filled in the stirring mill and the continuously flowing in and out of the ground material to perform complex grinding and circular motion in the lower body of the stirring mill, so as to realize the grinding of the material. Efficient grinding, the product fineness can reach micron level. As a high-efficiency and energy-saving ultra-fine powder grinding equipment, the vertical spiral stirring mill has been w...

AI Technical Summary

Problems solved by technology

[0003] Looking at the main structural parameters of the spiral agitator at home and abroad, first of all, the spiral liner and the spiral support plate on the spiral working surface need to have a suitable helix angle and spiral height-to-diameter ratio. These two parameters are opposite to the vertical spiral agitator. Grinding efficiency has a great influence, and changes with the composition and particle size of the incoming material, the particle size distribution of the product and the flow velocity of the slurry. It must be determined through comprehensive evaluation of experimental research, theoretical calculation and fluid field numerical simulation. However, the helix angle and the helix height-to-diameter ratio of the current vertical spiral stirring mill are not adjustable, which limits its adjustment function and thus affects the standard production and energy saving of the stirring mill; secondly, the current level of the spiral liner The sweeping structure makes the grinding medium and the spiral liner unreasonably stressed, and the grinding efficiency of the stirring mill has always been low, which is not conducive to the energy saving and consumption reduction of the equipment; moreover, the structure makes the cross section of the flow inconsistent before and after, resulting in partial Both the resistance and the resistance of the stirring mill body are relatively large, which leads to unreasonable selection of the slurry pump of the system equipment, etc., and it is easy to generate a local wake on the lower surface of the spiral liner, which increases the vibration of the stirring mill; third, the current spiral lining The plates are all cast in blocks with the same structure, but due to the huge difference in the distribution of the grinding media inside the lower body and the wide variety of working conditions such as material hardness and abrasiveness, the bottom spiral liner is frequently replaced. The longer the life of the plate, the uppermost spiral liner has almost unlimited life, and the replacement cycle is different, which reduces the operation rate of the stirring mill and affects the long-term stable operation of the stirring mill; fourth, the single head of the current vertical spiral stirring mill The number of screw heads makes the energy transmission of the screw unstable, and the overall force of the screw body is unbalanced, thus affecting the efficiency and stable operation of the stirring mill

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