Within a certain flow range, the efficiency curve of the large flow pump basically envelopes the efficiency curve of the small flow pump. Therefore, if the design method of increasing the flow is adopted, not only the efficiency is improved, but the most important thing is to improve the efficiency of the design flow point. Design Product Example Design Method Design Principle The method of increasing the flow design in a centrifugal pump is to amplify the given flow and specific speed, and use the amplified flow and specific speed to design a larger centrifugal pump to make it Working under a smaller flow rate, the efficiency of the pump is improved to a certain extent. If the flow rate is increased to the table and graph, it can be seen that the efficiency curve of the large flow pump envelops the efficiency curve of the small flow pump after the flow rate is greater, and the efficiency of the small flow pump is higher at the flow rate and the large flow pump The head curve of all envelopes the head curve of the small flow pump. Adopting the design method of increasing the flow rate, the flow rate magnification factor is equal to the magnification factor of each throat diameter. For the pump designed with the increasing flow method, the inner diameter of the annular pump body has not changed, and the throat is enlarged and the width of the impeller is enlarged. Generally, the width of the impeller is equal to or slightly larger than the diameter of the throat.