High Quality Industrial Ventilation Centrifugal Plastic Fan Impeller

There are generally two types of semi-open impeller structures. One is the front semi-open impeller, which is composed of the rear cover plate and the blade. The impeller efficiency of this structure is low. To improve the efficiency, it is necessary to use the seal ring with adjustable clearance. The other is the rear semi-open impeller, which is composed of the front cover plate and the blade. Since the same seal ring as the closed pump impeller can be used? The efficiency is basically the same as that of the closed impeller. Besides conveying liquid, the blade also has the sealing function of back blade or auxiliary impeller. The semi-open impeller is suitable for conveying liquid containing suspended solids such as solid particles and fibers. The semi-open impeller has less difficulty in manufacturing, lower cost, and strong adaptability. In recent years, it has been increasingly used in centrifugal pumps for oil refining and chemical industry, and is used to transport clean water and liquid similar to clean water.

The open impeller has only blades and blade stiffeners, and no front and rear cover plates. The number of open impeller blades is less than 2-5. The pump impeller has low efficiency and less application. It is mainly used to transport liquid with high viscosity and slurry liquid.

The runner impeller is a curved flow channel from the inlet to the outlet. This type of impeller is suitable for conveying liquid containing large particle impurities or long fibers. Because this type of impeller has excellent anti-clogging performance. But its disadvantage is that its cavitation resistance is weaker than other forms.