Factory Supply Investment Casting Vertical Turbine Pump Bowl Impeller

The swirl impeller is all or part of the impeller is retracted to the flow channel of the pressure chamber, and has good anti-clogging performance. The particles flow in the water pressure chamber is driven by the eddy current generated by the rotation of the impeller. The movement of the suspended particles does not generate energy, and the flow channel exchanges energy with the liquid. In the flow process, suspended particles or long fibers do not contact with the worn blades, and the blades are slightly worn, and there is no increase in clearance due to abrasion, which is suitable for pumping media containing large particles and long fibers.

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.