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The relationship between the angle difference of agitator blades and the flow st
The classification of agitators can be divided into straight blades, hinged blades and spiral blades according to the angle of the blades. Since the direction of movement of the straight blade is perpendicular to the blade surface, when the impeller is running at low speed, the main flow state of the liquid is a horizontal circular flow. When the impeller speed increases, the radial flow of the liquid gradually increases. The higher the speed of the impeller, the stronger the radial flow discharged by the straight blades. But only relying on the impeller itself, the axial flow it causes is still very weak. The leaf surface of the hinge is at a certain inclination angle with the direction of movement, so when the impeller moves, in addition to the horizontal circulation, there is also an axial shunt. When the impeller speed increases, there is a gradually increasing radial flow. The spiral surface can be regarded as a combination of many flaps, and the angle of these flaps gradually changes, so the flow direction of the spiral surface also has horizontal circular flow, radial flow and axial flow, of which the axial flow is the largest.
In order to distinguish the characteristics of the flow direction of the impeller discharge liquid, the typical impeller is divided into two types: radial flow and axial flow according to the main discharge direction. The straight blade type and turbine type are radial flow type, and the screw type and propeller type of helical blade are axial flow type. The folded-blade propeller lies between the two, and it is generally considered to be closer to the axial flow type. However, this method of division is approximate, and is divided based on the main flow.
