Main structure and suction performance of Centrifugal Fan Impeller

- Mar 16, 2019-

The Centrifugal Fan Impeller is composed of its blades and front and rear cover plates during the production process. The closed impeller is more efficient in operation and is most used in centrifugal pumps. It is suitable for conveying clean water without particles, such as clean water and solution.


The centrifugal fan impeller generally has two structures: one is a front half-open type, which is composed of a rear cover plate and a blade. The impeller of this structure is low in efficiency, and a sealing ring with an adjustable gap is needed for improving efficiency; the other is a second half. The open type consists of a front cover plate and a blade. Since the same sealing ring as the closed impeller can be applied, the efficiency is basically the same as that of the closed impeller, and the blade has a sealing function (back blade or auxiliary impeller) in addition to the liquid. .


The semi-open impeller of the centrifugal fan impeller is suitable for conveying liquids containing suspended solids such as solid particles and fibers. The semi-open impeller is less difficult to manufacture, lower in cost, and more adaptable. It is gradually used in centrifugal pumps for refining and chemical industry, and is used to transport clean water and liquids with similar water.


Open impeller of centrifugal fan impeller


Only the blade and blade ribs, the impeller without front and rear cover (the number of open impeller blades is 2-5 pieces less). The impeller has low efficiency and low application, and is mainly used for conveying liquid with high viscosity and slurry liquid.


The blades of the centrifugal pump impeller are generally curved blades. The blade has two kinds of cylindrical and twisted shapes. The application of the twisted blade can reduce the load of the blade, and can improve the suction performance of the centrifugal pump and improve the anti-cavitation ability.