Design and Manufacturing Technology of Three-element Flow High Efficiency Mid-open Pump Impeller-FuSi Pump_ Changsha water pump,vertical diagonal flow pump

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Design and Manufacturing Technology of Three-element Flow High Efficiency Mid-open Pump Impeller

Changsha Foss relies on the strong design force of the technical expert team to carry out the ternary flow design of the water pump. The optimization design of the high-efficiency mid-opening pump adopts the technical route of combining the ternary flow theory of the pump with CFD computational fluid dynamics and optimization methods. Starting from the consideration of the minimum hydraulic loss, the highest efficiency and the best cavitation performance, it looks for the optimal combination of different flow and geometric parameters.

ternary flow theory
Applying the "three-dimensional flow theory of impeller machinery", the three-dimensional space inside the impeller is divided indefinitely, and a complete and true mathematical model of fluid flow in the impeller is established by analyzing the working points in the impeller flow channel. The blade shape designed according to the ternary flow theory is irregular curved surface shape, the structure of the impeller blade can adapt to the real flow state of the fluid, and can control the velocity distribution of all fluid particles inside the impeller. Therefore, the operation efficiency of the pump designed by the ternary flow theory is significantly improved.

Characteristics of ternary flow impeller
· The three-dimensional flow blades of the meridian channel are wide, especially the hub is reduced, and the flow capacity is increased;
The diameter of the three-dimensional flow impeller in the meridian channel decreases, while the outlet width increases;
· The twist degree of the three-dimensional flow blade is large;
· The side of the three-dimensional flow blade extends to the inlet of the inflow, which reduces the inlet loss and improves the cavitation performance;
The three-dimensional flow impeller composed of two single-suction impellers with medium and high specific speed adopts the structure of interlacing adjacent blades, so that the water flow pulse drops to within ± 4 ‰ of the head, the water flow is more stable, the efficiency is higher, and the cavitation margin must be lower.
· The impeller seal ring is designed with a special labyrinth structure, which can reduce the seal ring gap, increase leakage resistance, reduce volume loss, and improve pump efficiency.

Manufacturing process of ternary flow impeller
Small and medium-sized ternary flow impeller, the mold adopts metal mold, the mold adopts numerical control processing, and the resin sand precision casting is adopted. For large-scale ternary flow impeller, the blade blank is cast or forged, and the front and rear cover plates of the blade and impeller are processed by numerical control. After processing, the entire impeller adopts flat welding process. The blade profile of the three-dimensional flow impeller fully meets the design requirements and minimizes

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