High-efficiency grading wheel for jet mill

Abstract

The invention discloses a high-efficiency grading wheel for a jet mill. The high-efficiency grading wheel comprises a front impeller disc, a rear impeller disc and a plurality of blades, wherein the blades are fixedly connected between the front impeller disc and the rear impeller disc and form a circle in an enclosing mode; a feeding gap is formed between adjacent blades, and a cavity is formed on the inner side of the circle of the blades; the rear impeller disc is used for being fixedly connected with a power input shaft of the grading wheel. The high-efficiency grading wheel is characterized by further comprising a plurality of pull rods; the pull rods are fixedly connected between the front impeller disc and the rear impeller disc; the blades form certain angles with the direction of shaft diameter, and are uniformly distributed. According to the high-efficiency grading wheel, overall strength of the grading wheel can be increased, the grading fineness is improved, eddy flows are effectively eliminated, the wind resistance is reduced, the energy consumption is reduced, the grading efficiency is improved, and the high-efficiency grading wheel is simple in structure and easy to carry out.

Description

technical field [0001] The invention relates to a classifying wheel of a jet mill, in particular to a high-efficiency classifying wheel of a jet mill. Background technique [0002] The working principle of the jet mill is: the compressed air is sprayed into the crushing chamber through the nozzle at high speed, and the material is repeatedly collided, rubbed, sheared and crushed at the intersection of multiple high-pressure airflows, and the crushed material is pumped by the fan. Under the action, it moves to the classification area with the upward airflow. Under the action of the strong centrifugal force generated by the high-speed rotating classification wheel, the coarse and fine materials are separated. The fine particles that meet the particle size requirements are discharged through the classification wheel, and the coarse particles descend to the crushing area to continue crushing. Among them, when the grading wheel is working, the air powder is under the action of ce...

AI Technical Summary

Problems solved by technology

like figure 2 As shown, the traditional blades are straight blades, and the blades are assembled perpendicular to the hub. This blade structure has the following defects: when the classification wheel rotates, the blades will generate local vortices, which will increase the airflow resistance. , which will affect the classification efficiency

In addition, when the cantilever shaft classifying wheel rotates at high speed, due to the unbalanced force on the front and rear impeller discs, the front and rear impeller discs will be twisted, which will cause the blades of the classifying wheel to deform

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