Centrifugal pumps can be divided into civil and industrial pumps, from the transmission medium can be divided into clear water pump, trash pump, corrosion resistant pumps and so on.
centrifugal pump
Because of pump startup, the pump outlet pipeline not water, so there is not resistance line resistance and the lifting height, the pump is started, the pump head is low, flows, time pump motor (shaftpower) Output great (according to the pump performance curve), it is easy to overload, it will cause damage to the pump motor and wiring, so start to close the valve to the pump running.
To better illustrate the essential principles of centrifugal pumping, it may be useful to consider a simplified version of an industrial pumping mechanism. A cylindrical can with a pair of rotary vanes along its interior can be attached to a shaft. This shaft has a pulley unit responsible for agitating the can with rotational movements. Once the can is filled with water, the pulley begins to rotate the shaft at high speed, causing the can to spin. As the water in the can rotates, centrifugal force pushes it out toward the walls of the can where it is pressed against the edges of its container.
Because the water cannot continue moving outward through the walls of the can, it begins to climb upward, eventually overflowing while the water at the center point is drawn downward. The overflowing water moves at the same velocity as it does at the rim, meaning that the kinetic energy it produces can be maintained if the water is caught and more water is supplied to the pump. Therefore, a receiving container is usually employed to catch the spilling water and a surplus tank is attached to the shaft to maintain a continuous supply of liquid. The same centrifugal force effect can be achieved without the pulley mechanism by rotating only the vanes or impellers within the can.
Because the water cannot continue moving outward through the walls of the can, it begins to climb upward, eventually overflowing while the water at the center point is drawn downward. The overflowing water moves at the same velocity as it does at the rim, meaning that the kinetic energy it produces can be maintained if the water is caught and more water is supplied to the pump. Therefore, a receiving container is usually employed to catch the spilling water and a surplus tank is attached to the shaft to maintain a continuous supply of liquid. The same centrifugal force effect can be achieved without the pulley mechanism by rotating only the vanes or impellers within the can.
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