Selection principle of submersible water pump
Pump is a kind of applicable to a wide range of general-purpose machinery and equipment, it widely application in petroleum, chemical, electric power, metallurgy, mines, ship selection, light industry, agriculture, civil and defense departments, occupies an important position in the national economy. According to 79 years of statistics, China's pump output of up to. Pump power consumption accounts for more than 21% of the national electricity consumption. So it is very important to reduce the energy consumption of the pump and to save energy.
At present, in various fields of national economy, because of unreasonable selection, many pumps are in the condition of unreasonable operation, low running efficiency and waste of a lot of energy. Some pumps due to unreasonable selection, it should not use, or the use and maintenance costs, low economic efficiency. Thus, the reasonable selection of pump also has an important significance for saving energy.
The so-called rational choice is to pump, pump and pumping station technical and economic indicators of investment and the operation expenses of comprehensive consideration, to meet the economic, safe, applicable principles. Specifically, the following aspects:
1. Must meet the requirements of the use of flow and head, which requires the pump operating point (device characteristic curve and the pump performance curve of the intersection) to keep running in the high efficiency range, so not only saving power and not easy to damage parts.
2. The choice of pump should not only small size, light weight and low cost, but also has good characteristics and high efficiency.
3. Have a good anti cavitation performance, so as to reduce the pumping station at the depth of excavation, not to pump cavitation, smooth operation and long life.
4. Pump pumping station built by the selected works of low investment, low operation cost.
