Improving the efficiency of irrigation pumps

The article presents the main goals of the development of pumping stations based on the development of criteria and the allocation of priorities for increasing the efficiency of operation, which the authors formulate for the strategic, functional, morphological structure of the pumping system. The main criterion for research is the modernization of vane pumps, considering the operation of the main structures, their modes of operation and structures. The importance of internal flow in the flow path of the pump is emphasized with the use of new impellers, in which the blades rotate in three-dimensional space from axial to radial direction. If you combine a free vortex flow with a point source, you get a flow with a logarithmic spiral. The recommended design speed in the discharge nozzle of the pumps is -6 - 7 m / s, and to reduce losses, it is recommended to install a conical diffuser with a central angle of 10-12 ° at the discharge nozzle. Changing the hydraulic characteristics of the intake structure can be achieved: by improving the shape of its inlet part, for example, the bell of the front chamber, or by reducing the angle of the diffuser of the bell.