centrifugal pump construction
A centrifugal pump has a casing which is made in the form of a cylinder lid.
In the interior of the body cavity through a hole passes shaft, which planted the blade. Lid sealed by a rubber ring and the clamping screws. It is located along the axis of the shaft suction port. Tangential to the cylinder housing mounted discharge tube. When rotating shaft in the pump chamber fluid is discarded blade to the periphery of the chamber and the centrifugal force created pressure for the withdrawal of his discharge pipe and transportation by pipeline. In the central part of the chamber formed by a vacuum pump, and there comes a new portion of liquid.
Fluid flow is not interrupted. Return fluid from the cavity of the pumping cavity of the suction between the body and the blade is prevented by the minimum possible gap between them. The supplied from the electric motor to the impeller pump energy is expended on overcoming the hydraulic resistance within the pump and increase the flow of liquid. Normal centrifugal pump can not operate as a self-priming. This property it acquires as a result of air separator, nozzles and cranked up the suction pipe. Permissible deviation from the vertical suction port of the pump as a self-priming should not exceed 20 degrees. Running such a pump as follows. Impeller pump, filled up the upper level air intake of liquids (milk) forms in the chamber air-liquid mixture and pushes it through a nozzle into air purge. Liquid was freed in air purge of air is returned to the chamber. This process continues until until you create the necessary suction to lift the liquid through the suction pipe and filling the working chamber, after which the pump is operating as centrifugal. In the following restarting the process renewed through the remainder of his working chamber fluid.
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2012-05-14
