The self-priming pump is a commonly used industrial pump. Its principle is to use the flow impulse of water, and the impeller drives the pump impeller to pump water to the river bank. This kind of pump can be thrown into the river to pump water, but it requires a place where the water flows rapidly or there is a drop.
Self-priming pumps are different from general centrifugal pumps. Before the centrifugal pump works, the pump body and the water inlet pipe must be filled with water into a vacuum state. When the impeller rotates quickly, the blades prompt the water to rotate quickly, and the rotating water flies away from the impeller under the action of centrifugal force. After the water is thrown out, the central part of the impeller forms a vacuum area. The water in the water source is pressed into the inlet pipe through the pipe network under the action of atmospheric pressure (or water pressure). In this way, the circulation is endless and continuous pumping can be realized. The self-priming pump does not need to be filled with water, which is the origin of the self-priming pump.
Self-priming principle of self-priming pump: Due to the design of the pump casing, its sealing performance is higher than that of ordinary centrifugal pumps, and the water in the pump casing will not be automatically emptied after the motor is stopped. The motor drives the turbine to rotate at a high speed to quickly form the inside of the pump. Negative pressure (vacuum). Use atmospheric pressure to press the water to the pump casing, and then centrifuge the head. Therefore, the suction stroke of the self-priming pump will not exceed one atmosphere, about 11M.
The scope of application of self-priming pumps:
1. It is suitable for urban environmental protection, construction, fire protection, chemical industry, pharmaceuticals, dyes, printing and dyeing, brewing, electric power, electroplating, papermaking, industrial and mining washing, equipment cooling, etc.
2. It is equipped with a rocker-arm sprinkler and can spray the water into the air after being scattered into small raindrops. It is a good machine for farms, nurseries, orchards, and vegetable gardens.
3. It is suitable for clean water, sea water, chemical medium liquid with acidity and alkalinity and slurry with general paste (medium viscosity <100 centipo, solid content up to 30%).
4. It can be used with various types and specifications of filter presses. It is an ideal matching pump for filter press when the slurry is sent to the filter press.