The function of the centrifugal pump impeller

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Centrifugal pump impellers: There are generally two types of structures. One is the semi-open type, which consists of a rear cover plate and blades; this type of impeller has lower efficiency. To improve efficiency, a sealing ring with adjustable clearance is required. The other type is also semi-open, but it consists of a front cover plate and blades. Since the same sealing rings as those used in closed impellers can be applied, its efficiency is roughly the same as that of closed impellers. In addition to transporting liquid, the blades also serve a sealing function (through back blades or auxiliary impellers). Semi-open impellers are suitable for transporting liquids containing suspended solids, fibers, and other particles. Semi-open impellers are relatively easy to manufacture, have lower costs, and exhibit good adaptability; as a result, their use in centrifugal pumps for the oil refining and chemical industries has been increasing in recent years, and they are also used for transporting clean water and liquids similar to clean water.