Vertical pump selection

Vertical pump works: If the motor drives the shaft, the impeller liquid under the action of centrifugal force is full, from the center of the impeller along the flow path between the leaves thrown to the impeller around, due to The liquid is subjected to the action of a vane to simultaneously increase the pressure and the velocity and is led to the secondary impeller through the flow passage of the guide shell so that the pressure energy of the liquid is further increased by sequentially flowing through all the impellers and the guide shell. After each impeller step by step, you get a certain lift. In the vertical pump selection is the main attention: than the speed and so on. Vertical pump pump speed and cavitation than the speed: In a variety of pump parameters, pump speed n and cavitation than the speed c is the pump of two important parameters. Although the specific speed of the pump is not as decisive as the turbine speed and the geometry of the overcurrent portion, and sometimes the same speed than the pump geometry is not necessarily the same, but for the same type of pump, Under the same operating conditions, it is still a symbol of the comprehensive technical indicators of pump technology. Specific speed than the pump geometry similar to the important parameters of similar motion, the size of the speed than the speed of the pump impeller shape and performance of the trend curve. Therefore, for the pump to choose the appropriate than the speed of special importance. Pump selection is different from the turbine is the choice of pump There is also a emphasis on the import part of the pump base similar to the ginseng - cavitation than the speed, cavitation than the size of the pump marks the anti-cavitation performance is good or bad, which is related to Whether the pump can run safely and stably is also an important parameter that the pump has to consider. In today's pump parameter selection, the commonly used method is to first select the specific speed of the pump, that is, through the analysis of the modern production level, the same type of pump has been produced than the statistical analysis of speed statistics, select the appropriate Than the speed value, which deduced the other parameters. Another is to use the same type of pump has been produced by the statistical data of the rate of cavitation, select the appropriate pump speed, specific speed, and then calculate the other parameters. Related Articles: Single-stage pump and multi-stage pump differential single-stage pump works

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