The characteristic curve of the centrifugal pump is a set of curves drawn from the experimentally determined Q, H, N, η and other data. This figure is provided by Shanghai Yiling Pump Industry Co., Ltd., for the use of the pump selection and operation reference:
The characteristic curve of the centrifugal pump is a set of curves drawn from the experimentally determined Q, H, N, η and other data. This figure is provided by Shanghai Yiling Pump Industry Co., Ltd., for the use of the pump selection and operation reference:
Different types of pumps have different characteristic curves, but they all have the following three curves:
(1) The HQ line indicates the relationship between the indenter and the flow rate;
(2) The NQ line indicates the relationship between pump shaft power and flow rate;
(3) The η-Q line indicates the relationship between the efficiency of the pump and the flow rate;
(4) The characteristic curve of the pump is measured at a certain speed, so the speed n value is marked on the characteristic graph.
The performance curve of the centrifugal pump can be used as the basis for selecting the pump. After determining the type of pump, the pump is selected according to the flow rate and pressure head.
Below we have collected some types of centrifugal pumps and the rules of selection, I hope to help your actual selection.
First, the type of centrifugal pump can be divided into: according to the nature of the liquid being transported:
(1) Centrifugal pump water pump (type B, type D, sh type) is used to transport clean water and clean liquids with physical and chemical properties similar to water.
(2) Corrosion resistant pump (F type) is used to transport corrosive liquids such as acid and alkali.
(3) Oil pump (Y type) is used to transport petroleum products.
Second, the selection of centrifugal pump (1) according to the nature of the liquid being transported and operating conditions to determine the type;
(2) Determine the type of pump (selected from the sample or catalogue) based on the flow rate (generally determined by the production task) and the required pressure head in the pipeline;
(3) If the viscosity and density of the liquid to be transported are significantly different from the water, the characteristic parameters of the pump should be accounted for: flow, head and shaft power.
When selecting a centrifugal pump, there may be several types of pumps that meet the requirements of operating in the optimal range. At this time, the efficiency of each pump's working point can be determined separately.
Centrifugal pump is characterized by large liquid feeding capacity and uniform flow, but the resulting pressure head is not high and the pressure head changes with the change of flow rate.
Article from: http://NewsDetail232T1.html China Hardware Business Network http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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