1. Closed leaf wheels: consisting of leaves and front and back cover. The efficiency of closed impeller is high and the manufacturing is more difficult. Apply the most in centrifugal pumps. Suitable for cleaning water with small viscosity such as clearing water and solution.

2. Half -open leaf wheel: Generally there are two structures in the first half, consisting of the rear cover and blades. This structure of the impeller is relatively low. In order to improve the efficiency The rear half is opened, consisting of the front cover and blades. Since the application of the same sealing ring with the same seal of the impeller of the closed water pump is basically the same as the closed impeller, and the blade is in addition to the transport liquid, it also has: back leaves or auxiliary impeller wheels Sealing. The semi -open leaf wheel is suitable for transporting liquids containing solid particles and fibers. The semi -open impeller manufacturing is less difficult, low in cost, and strong adaptability. In recent years, it has gradually increased the application in centrifugal pumps in refining and chemical pumps, and is used to transport clear water and approximate water.

3. Open blade wheels: Only the leaves of the leaves and blades are enhanced, and the impeller has no front cover. The number of open leaves is 2-5 pieces. The water pump is low -efficiency and less applications. It is mainly used to transport liquids with higher viscosity and slurry liquid.

The blade of the centrifugal pump pump leaf is generally rear -curved leaf. The leaves have two types of cylindrical and distorted. The use of twisted blades can reduce the load of the blades, and improve the inhalation performance of the centrifugal pump and improve the resistance of gas erosion. The pumping leaf refining chemical uses a centrifugal pump leaf wheel for casting or welded seam welded. Welding water pump leaf wheels have been developed in recent years. Metal materials with poor casting performance, such as iron and its alloys, special centrifugal pumps manufactured. The geometric accuracy and surface smoothness of the welding water pump leaf wheel are better than the cast impeller, which is conducive to improving the efficiency of centrifugal pumps.