The pump was developed along with the development of the industry. In the 19th century, there were already more complete types and varieties of pumps in foreign countries, and they were widely used. According to statistics, in 1880, the output of general-purpose centrifugal pumps accounted for more than 90% of the total output, while special-purpose pumps such as pumps for power plants, chemical pumps, and mine pumps accounted for only about 10% of the total pump output. By 1960, general-purpose pumps accounted for only 45Y002Ea, while special-purpose pumps accounted for 55% o2Ea.
According to the current development trend, special-purpose pumps will be more advanced than general-purpose pumps. As early as the beginning of the 20th century, the submersible sewage pump was first developed by the United States to replace the deep well pump. Subsequently, Western European countries also carried out research and development, and constantly improved and gradually improved. For example, the Rhine Brown Coal Mine in Germany uses more than 2,500 submersible sewage pumps with a capacity of up to 1600 kW and a head of 410 m. China's submersible sewage pump was developed in the 1960s. Among them, the submersible electric pump of the school surface has been used for watering in the farmland in the south, and the submersible electric pump of medium and small capacity has been formed into a series, and it has been put into production in batches. Large-capacity and high-voltage submersible pumps and submersible electric motors have also been launched. Large-scale submersible pumps of 500 to 1200 kW have been put into operation in the mine.
Machines for pumping liquids, transporting liquids, and increasing the pressure of liquids are commonly referred to as pumps. From an energy point of view, a pump is a machine that converts energy, which converts the mechanical energy of the original thought into the energy of the liquid being transported, increasing the flow rate and pressure of the liquid. Pumps are typically used to draw liquid from a lower ground and transport it along a pipeline to a higher ground.
For example, we often use the pump to pump water from the river and pond to the farmland. For example, the water in the deep underground well is pumped up and sent to the water tower. Since the pressure of the liquid can be improved via the pump, the pump can also be used to draw the liquid out of the lower pressure vessel and to overcome the resistance along the way to a higher pressure vessel or other desired location, such as The boiler feed water pump draws water from the low pressure water tank to the water supply in the boiler drum with higher pressure.
The pump has a wide range of functions, with a massive pump flow rate of up to several hundred thousand in/h; and a miniature pump flow of less than a few tens of mL/h. The pressure can be as high as l000 MPa or more from atmospheric pressure. It can transport liquids at temperatures as low as ~200 °C and up to 800 °C. There are many kinds of liquids to be pumped, which can transport water (purified water, sewage, etc.), oil, acid and alkali, emulsion, suspension and liquid metal.
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Tag: Pump Flow Application and Development Pump Delivery Submersible Pump General Purpose
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