The application and feature of self-priming centrifugal pumps
Pump is most widely used product in domestic market, not only in agricultural machinery, but also in industrial machine. Pump can be simply divided into different catalogs, such as gear pump, centrifugal pump, vacuum pump, hydraulic gear pump, screw pump, high pressure gear pump and so on. The basic use for these pumps is liquid transportation, which includes water, oil, emulsion, liquid metal and gas mixture. Because of the widely use of these pumps, in China the production value of pump is more than 7 billion dollars, and pump consumes 20% of national generating capacity.
Pump is a kind of machine which is used to inhaling and discharging liquid, the basic theory is that the pump is controlled by prime motor, driving the fluid move forward. According to the theory of pump, pump can be divided into vane pump, jet pump and pump which depends the periodical change of volume to work, vane pump can be divided into centrifugal pump, vortex pump and mixed-flow pump by the blade of pump and the structure of flow.
Now we’d like to introduce the working theory of centrifugal pump, when start the pump, it is filled of liquid, after the start, the blade is turning at a high speed by motor, so is the liquid between blades, under the action of centrifugal force, liquid is thrown away from centre of pump, and enter the snail-shaped shell, the flow is becoming narrow, the liquid slow sown, and change kinetic energy into static energy, in the end, the liquid is discharged from the pipe, and be delivered to the working position, when the liquid is thrown away from centre of pump, the centre of pump become vacuum, because pressure outside of pump is bigger than inside, so the liquid is pressed into the pump, and keep the pump working.
Self-priming centrifugal pump is a new kind of pump which is produced from the introduction, digestion and improvement of pump technology abroad, now it is wide used in oil industry, we can use it to transport gasoline, coal oil, diesel oil, seawater, water and industrial liquid. Here are the features of self-priming centrifugal pump, it has simple structure, high efficiency, long life, low maintenance, excellent self-priming ability and is convenient for operation, when we use self-priming centrifugal pump, we don’t have to pave valve in the pipe, only thing which we need to do is guaranteeing enough oil in the pump.
Pump will be widely used in every area of China transportation market, and with the introduction of foreign advance technology, pump industry will develop better.
