Space guide vane body of a staggered centrifugal pump

Abstract

The invention relates to a staggered centrifugal pump spatial guide vane which comprises upper vanes (2), lower vanes (3), fixing vanes (6), a hub (4) and a housing (1). Each upper vane (2) and each lower vane (3) are the upper part and the lower part cut along the middle flow line of a spatial guide vane designed by traditional methods and are three-dimensionally warped. The upper vanes (2) and the lower vanes (3) are evenly distributed in a staggered manner. In the circumferential direction, each upper guide vane (2) is located nearby the center of every two lower guide vanes (3) adjacent to the upper guide vane (2). The upper guide vanes (2) are fixed on the housing. The lower guide vanes (3) are fixed on the hub. By the staggered arrangement of the upper vanes and the lower vanes, flowing status of fluid in a spatial guide vane runner is improved, outlet pressure and speed distribution of the spatial guide vane are even, secondary flow and axial vortex areas are reduced remarkably, and accordingly pump outlet pulse is lowered, and evident damping and noise reduction effect is achieved.

Description

technical field [0001] The invention relates to a space guide vane body of a centrifugal pump, belonging to the field of hydraulic machinery. Background technique [0002] The space guide vane body is also called the guide shell. Its main feature is that the axial length is long and the radial direction is short. It is used in various well pumps (deep well pumps, submersible pumps) and guide vane mixed flow pumps. The internal flow is complex and the blades are twisted. Larger, there is a certain degree of design difficulty. The space guide vane acts as the entire pressurized water chamber, collects the liquid at the outlet of the impeller and sends it to the inlet or outlet pipeline of the lower impeller, converts the velocity energy into pressure energy, and eliminates the velocity circulation. When designing a traditional space guide vane, the inlet and outlet angles, inner and outer streamlines, axial length and intermediate streamlines of the guide vane should be deter...

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Problems solved by technology

Foreign articles (HydrodynamicDesignofPumpDiffuserUsingInverseDesignMethodandCFD.JournalofFluidsEngineering, Vol.124 / 319) use the "three-dimensional inverse design method" to design space guide vanes, and conduct research on the internal flow of space guide vanes through computational fluid dynamics (CFD) and oil film method experiments, but these studies None of them involve measures to reduce the pressure pulsation at the outlet of the space guide vane

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