Stainless steel mixed-flow pump the cause of failure

the cause of stainless steel mixed-flow pump failure

mixed flow pump with guide vane after stainless steel internal flow field in 3 d - PIV measurement, by comparing the absence of guide vane impeller exit flow field showed that, in the steady operation of high efficiency operating mode area, guide vane can effectively eliminate fluid velocity circulation flow from the impeller outlet, but running unstable & quot; Saddle area & quot; , the performance of the guide vane recycling energy, guide vane internal flow disorder, pump efficiency is low;

using spherical five hole probe of stainless steel in the cross section of the mixed flow pump outlet pipe flow velocity was determined, and found that the guide vane of circulation and water pipe bending secondary flow, the influence of such factors as stainless steel mixed-flow pump outlet conduit for complex spiral flow;

in the open type stainless steel mixed-flow pump test bench velocity field before and after the impeller and the pump shell, and the pressure distribution on the surface of the measured, found that when the optimal point within the impeller flow more smooth and no reflow phenomenon, as the flow rate drops to blade stall occurs, the impeller of the radial velocity increases suddenly, at the same time, the hydraulic performance of stainless steel mixed-flow pump will mutate;

under different flow conditions of impeller shaft surface flow field in PIV measurement, imported stainless steel mixed-flow pump impeller appear backflow phenomenon, and the flow rate decreases, and the impeller imports in the axial plane velocity unstable scope expanding gradually and higher turbulent intensity, axial velocity and turbulence intensity is lower than the radial velocity of turbulent intensity, the turbulence intensity is higher than near the impeller shell near the wheel yi turbulence intensity.

the advantages of vertical stainless steel mixed flow pump

1, the operation is simple, because the impeller are above the surface, in stainless steel mixed flow pump before starting to use vacuum pump to pump the water injection, because the vertical water pump impeller, usually sink in water, can be started directly.

2, small installation space, including drive, as long as the vertical pump horizontal pump half space is enough. Today, especially in the pump to buy, the more evident advantages.

it is worth noting that the vertical stainless steel longitudinal of mixed flow pump, when the disassembly and assembly of the crane hoisting height is higher, the top of the pump should have enough space, this is the shortcoming of vertical stainless steel mixed flow pump, however, almost all stainless steel mixed-flow pump installed in the outdoor, it would never have become a problem.

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