Closed type medium-flow high-pressure three-dimensional flow impeller for powder and coal discharge fan of ironmaking plant

Abstract

The closed type medium-flow high-pressure three-dimensional flow impeller comprises a front disc, three-dimensional flow blades, a flow guide conical disc, a rear disc, a shaft disc and a main shaft, the main shaft is coaxially sleeved with the shaft disc, the main shaft is coaxially sleeved with the rear disc, the main shaft is coaxially sleeved with the flow guide conical disc, and the three-dimensional flow blades are arranged on the front disc. The three-dimensional flow blades are distributed on the side wall of the rear disc in an array mode around the circumference of the main shaft, the front disc is fixedly connected to the sides, away from the rear disc, of the three-dimensional flow blades, a front disc inlet is formed in the center of the front disc, and the front disc sequentially comprises a linear section, an outer arc section and an inner arc section from outside to inside. The invention belongs to the technical field of manufacturing of pulverization and coal discharge fans, and particularly provides a method for designing by applying a quasi-ternary theory. The closed type medium-flow high-pressure three-dimensional flow impeller for the pulverization and coal discharge fan of the iron mill effectively solves the problems that fans commonly used by coal discharge systems of the iron mill are high in operation energy consumption, large in noise and the like.

Description

technical field [0001] The invention belongs to the technical field of the manufacturing field of a pulverizing and coal-discharging fan, in particular to a closed-type medium-flow high-pressure ternary flow impeller used for a pulverizing and coal-discharging fan in an iron smelting plant. Background technique [0002] Medium-flow high-pressure centrifugal fans are widely used in the coal discharge system of ironworks. The representative models of medium-flow high-pressure centrifugal fans are 6-29, 6-31, 6-35, 6-39, 7-28, etc. The impellers of these fans are all Designed for binary leaf shape. Since the internal flow of the centrifugal fan is a complex viscous, three-dimensional and unsteady swirling flow, there is a relatively complex vortex structure, and may be accompanied by complex flow phenomena such as boundary layer separation, backflow, "jet-wake" and other complex flow phenomena. mutual movement. Therefore, at present, such fans have disadvantages such as low o...

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Problems solved by technology

[0003] In order to solve the above-mentioned existing problems, the present invention provides a design using the quasi-ternary theory, aiming at the defects and deficiencies of the existing design methods, effectively solving the problems of high energy consumption and high noise in the operation of fans commonly used in coal discharge systems in ironworks. Closed medium-flow high-pressure three-way flow impeller for pulverized coal exhaust fans in ironworks

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