Vortex air classifier non-radial curved blade rotation cage

Abstract

The invention discloses a vortex air classifier non-radial curved blade rotation cage, and belongs to the field of powder preparation. Rotation cage blade molded lines and installation angles are designed based on air flow movement characteristics in a classifier. A detailed implementation method is that rotation cage blades adopt curved blades of which the advancing faces are concave faces; the rotation cage blades are evenly distributed along the circumference direction of the rotation cage, and are vertically fixed between an upper wheel stand and a lower wheel stand; the rotation cage blades are mounted along a non-radial direction, an inlet mounting angle of each rotation cage blade is between 40 degrees and 50 degrees, and an outlet mounting angle of each rotation cage blade is between 80 degrees and 90 degrees. The non-radial curved blade rotation cage can ensure flow lines of air flow in channels among the rotation cage blades to be superposed with the rotation cage blade molded lines, reduces impact of the rotation cage blades to the air flow and powder, inhibits the formation of airflow vortexes among the rotation cage blades, increases the stability of flow fields among the rotation cage blades, improves classifying performance, and further enhances the fine powder yield and classifying accuracy of a vortex air classifier.

Description

technical field [0001] The invention relates to a tumbler used for dry material sorting by a vortex air classifier, and belongs to the field of powder preparation. Background technique [0002] Ultrafine powder is the basis for preparing structural and functional materials. It is widely used in fine ceramics, high-quality refractory materials, fine chemicals and national defense cutting-edge technology fields. With the development of material science and the needs of engineering applications, the development of ultrafine powder preparation technology The requirements are constantly increasing. [0003] Using the vortex air classifier to classify materials and obtain fine particles that meet the size requirements is one of the main links in the current dry powder preparation. The material is separated from the coarse and fine particles in the annular area between the outlet of the air guide vane of the vortex air classifier and the entrance of the tumbler cage. flow out. A...

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Problems solved by technology

However, this will cause the velocity gradient of the flow field in the channel between the blades of the tumbler to increase, and the phenomenon of reverse rotation of the airflow will intensify, so that part of the fine powder cannot pass through the tumbler, and will be brought back to the annular area by the reverse swirl flow; The large angle of attack causes the impact of the rotor cage blades on the airflow and powder, which is not conducive to the stability of the flow field and the fine powder passing through the rotor cage, reducing the classification accuracy and fine powder collection rate

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