Centrifugal pump works Before the pump starts, the pump and inlet pipe filled with water, the pump is running, the centrifugal force generated by the rotation of the impeller at high speed, the water in the impeller runner was thrown around the phase, pressed into the volute, The impeller inlet creates a vacuum, and the water in the tank complements this space by suction along the suction pipe at ambient atmospheric pressure. The inhaled water is then thrown out of the impeller by the volute into the outlet pipe. Thus, if the centrifugal pump impeller constantly rotating, you can continuously absorb water, pressure water, water can continue to rise from low to high or far away. In summary, the centrifugal pump is due to the centrifugal force generated by the high-speed rotation of the impeller, the water was raised to the high, it is called centrifugal pump. Centrifugal pump general characteristics (1) along the centrifugal pump water flow direction is along the impeller axial suction, perpendicular to the axial outflow, that is, into and out of the flow direction of mutual 90 °. (2) Since the centrifugal pump to form a vacuum suction by the impeller inlet, so before starting pump and water pipe must be filled with water, or use a vacuum pump to evacuate the air to form a vacuum, and the pump housing and suction pipe must be strictly sealed, Do not leak, or can not form a vacuum, it can not absorb the water. (3) Since it is impossible to form an absolute vacuum at the inlet of the impeller, the suction height of the centrifugal pump can not exceed 10 meters. Adding the water loss through the suction pipe, the actual allowable installation height (the pump shaft is far away from the suctioned water) 10 m. If the installation is too high, it will not absorb water. In addition, because the mountainous area is lower than the atmospheric pressure in the plain, the same pump should be installed at a lower altitude when it is installed in the mountains, especially in the high mountains. Otherwise, the water can not be sucked in.
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