Airfoil type axial-flow stirrer

Abstract

The invention discloses an airfoil type axial-flow stirrer, which comprises a stirring shaft, a hub and a propeller blade, wherein the hub is mounted on the stirring shaft; the propeller blade can be mounted on the hub removably or irremovably; the propeller blade of the stirrer has a smooth special distortion face, the cross section at any radius position is in an airfoil shape, the angle of pitch and blade width increase continuously from the end part to root part of the blade, and the design is based on a uniform pitch structure; and a plurality of isosceles trapezoid-shaped channels, which are vertical to the central line of the blade, are formed on the blade and are symmetrically distributed on the blade. The airfoil type axial-flow stirrer has the advantages that: the impact force applied by a fluid on the back of the stirring propeller blade face is reduced; the vibration of the stirrer is reduced; the axial circulation and flowing are reinforced; the flowing property of fluid in the reaction kettle is improved obviously; the liquid and solid phases are well separated; the stirring of the materials in the kettle is uniformly; and gases formed by reaction can be conveyed and allowed to escape smoothly to guarantee a normal reaction. In addition, the stirring power of the airfoil type stirrer is smaller than common airfoil propeller, so the energy consumption is low.

Description

technical field [0001] The invention relates to an agitator, in particular to an airfoil axial flow agitator. Background technique [0002] Stirring and mixing equipment is widely used in various industries such as chemical industry, light industry, and pharmaceutical industry. As an important operating unit, its main function is to transfer energy to liquid and other materials through the agitator, allowing it to move radially or axially, so that two or more liquid or solid materials or between the two can be fully mixed. Various processes such as mixing, stirring, dissolving, dispersing, and reacting. [0003] At present, the paddle forms commonly used in agitators are: axial flow stirring paddle, long blade propeller, straight blade turbine paddle, plate frame paddle, three-blade back curved paddle, MIG type paddle, anchor paddle, screw type paddle, There are several types such as single-screw ribbon impeller, double-screw ribbon agitator and helix-screw ribbon impeller...

AI Technical Summary

Problems solved by technology

Commonly used axial flow agitators are pusher agitators and 45° inclined blade turbines. The pusher agitators have the advantages of large axial displacement and high efficiency, but because they are manufactured by mold casting, the cost is high and the specifications are small. Cannot be used in mixing equipment

The 45° inclined blade turbine is simple in design, low in manufacturing cost, and easy to be enlarged. However, since the pitch angle of the blade is constant, the pitch varies from the root of the blade to the tip of the blade at different radii, resulting in uneven axial velocity distribution of the fluid. And the tangential velocity is large, the fluid resistance is large, the power consumption is high, and the mixing effect is not ideal

If an ordinary axial-flow agitator is used, the impact of the fluid on the back of the blade surface of the agitator is greater, which increases the vibration of the agitator, and the blades of the agitator will affect the transmission and escape of gas

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