The pump is accompanied by industrial development and developed. l9 century, the foreign has a relatively complete pump type and
variety, and a wide range of applications. According to statistics, in 1880, the general purpose centrifugal pump output accounted for
more than 90% of the entire pump output, the power plant pumps, chemical pumps, mining pumps and other special purpose pumps, only 10%
of the entire pump output or so. By 1960, the general-purpose pump is only about 45%, and special purpose pumps account for about 55%.
According to current trends, special-purpose pump, than the proportion of general-purpose pump but also to improve.
Back in the early 20th century, the submersible pump successfully developed by the United States first, and use it to replace the
deep well pump. Subsequently, the Western European countries have also conducted research, and continue to be improved, and gradually
improve. Such as Germany s Rhine brown coal, using a variety of submersible pumps over 2500 units, the largest capacity up to 1600kw,
lift 410m.
Our submersible pump is developed in the 1960s, the work surface submersible pumps in the south has long been used for irrigation of
farmland, and small and medium-capacity submersible pump has formed a series, and batch input production. Large capacity and high
voltage submersible pumps, submersible motors have been published ,500-1200kw large submersible pumps have been put into operation in
the mine. Open iron ore of the Anshan Iron and Steel Company YANQIANSHAN 500kw submersible pump drainage during the rainy season results
are obvious. There are signs that the use of submersible pumps will be mine drainage of change and have the potential to replace the
traditional lying pump. In addition, the greater capacity of the submersible pump trial in
Usually collectively referred to as the machine used for pumping liquids, transportation of liquid and liquid to increase the
pressure pump. From the energy point of view, the pump is an energy-conversion machine, it can be transformed into the prime mover
machinery for the energy of the liquid is transported, so that the liquid flow rate and pressure increase.
The role of the pump is generally used to place pumping liquid from the low-lying up places to go to higher ground along the
pipeline transportation. For example, we see daily, pump, pumping the water in rivers, ponds and from farmland irrigation; Another
example is pumping up water from deep underground and sent to the towers go up and so on. The liquid through the pump pressure can
improve the role of the pump can be used to the liquid from the container of low pressure suction, and transported to the high pressure
container or other to overcome the resistance along the way, for example, boiler feed pump suction water from the low pressure tank to
the high pressure boiler drum water supply.
Pump performance and a wide range of massive pump flow can be large up to hundreds of thousands of m3 / h, above; miniature pump
flow is the following in the tens of mL / h. The pressure from atmospheric pressure has been up to l000mpa. Transmission fluid
temperature as low as -200 ℃ below up to above 800 ℃. Pumping liquid type, it can transport water (water, sewage, etc.), oil, acid and
alkali liquid, emulsions, suspensions, and liquid metal.
People daily to see the pump is mostly used to transport water, so in the habit of usually call it the water pump. However, the term as
a generic term for the pump, then obviously it is not comprehensive.
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