Novel powder selecting machine capable of uniformly scattering material

Abstract

The invention discloses a novel powder selecting machine capable of uniformly scattering a material, which comprises a cylindrical shell, a support base used for supporting the shell, a motor, a speed reducer, a coupling device, a rack and a rotating part arranged in the shell, wherein the rotating part comprises a spindle and a rotor, and an annular material scattering plate is fixedly arranged at the top of the rotor; the material scattering plate is provided with two layers, and comprises a top-layer material scattering plate and a bottom-layer material scattering plate, and the top-layer material scattering plate is arranged under a material inlet of the powder selecting machine; and an annular first-stage baffle plate is arranged correspondingly to the outer edge of the top-layer material scattering plate, the bottom-layer material scattering plate, the diameter of which is larger than the diameter of the top-layer material scattering plate, is arranged under the top-layer material scattering plate, an annular second-stage baffle plate is arranged correspondingly to the outer edge of the bottom-layer material scattering plate, the first-stage baffle plate and the second-stage baffle plate are both fixedly connected with the shell, the lower part of the first-stage baffle plate is corresponding to the plate surface of the bottom-layer material scattering plate, and the lower part of the second-stage baffle plate is corresponding to a material grading zone of the powder selecting machine. The powder selecting machine disclosed by the invention can make the material uniformly and loosely enter into the material grading zone, and enhance the grading precision of the material.

Description

technical field [0001] The invention relates to a grinding system equipment of an industrial enterprise, in particular to a new type of powder classifier which spreads materials evenly. Background technique [0002] The powder classifier is the material classification equipment for the grinding system of industrial enterprises. When the powder classifier is working, the materials to be classified are introduced from the feeding port, are hit and dispersed on the spreading plate, and then fly outward along the surrounding of the spreading plate, and then After the buffer plate collides, it falls into the powder selection chamber, where it meets the horizontal vortex airflow. Under the joint action of the guide vane and the rotor, the centrifugal force, the suction force of the air flow and the gravity act on the materials together to achieve classification. [0003] However, with the large-scale of grinding equipment, there are great defects in the structure of existing powde...

AI Technical Summary

Problems solved by technology

Theoretically, the material should be thrown into a 360-degree uniform material curtain by the powder separator, but as the capacity of the equipment increases, the number of feed ports of the powder separator is limited. The increase in the width of the disc ring is not proportional to the increase in the amount of material to be processed, and the processing capacity per unit area gradually increases. Even if the feed port of the powder classifier is increased to four, the material is still easily not fully scattered near the feed port. Sliding into clumps into the graded flow field

Although the existing powder classifier has made some improvements to the annular spreading disc, such as changing the radial corrugation to a spiral corrugation, increasing the throwing area; adding a rib to the outer edge of the spreading disc to delay the material sliding out time, The throwing area is increased, but the following problems still exist in this ring-shaped material spreading device: First, thicker material curtains and material-free cavities appear alternately around the grading cage, which not only causes the separation wind speed in the vortex field to be uneven, Inhomogeneous airflow velocity field leads to space fluctuation of classifying particle size along the axis of the cage, turbulence pulsation leads to time fluctuation of classifying particle size, false large particles produced by van der Waals gravity lead to fishhook effect and other factors will significantly reduce the classification accuracy, and also It affects the subsequent dispersion of the powder, thus affecting the classification effect; secondly, when the blanking material has not rotated synchronously with the airflow, the classification effect is not complete, and it is easy to run coarse, that is, the classification particle size interface is not obvious, and the classified product is not clear. qualified

Especially when the material curtain has a certain thickness and the material is spread unevenly, it will take a certain time and process to make all the powder materials rotate synchronously with the airflow, and there will be coarse particles that do not rotate or the rotation speed is small, and the centrifugal force generated is small and is blown by the wind. The suction force is taken away, so that it runs coarse, and the powder is easier to run coarse in a certain stroke when it starts to fall

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