【Q&A】June 25, 2017
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Briefly describe the working principle of a centrifugal pump? Answer: A centrifugal pump is a machine that uses the centrifugal force generated by the high-speed rotation of an impeller to transport liquids. When the electric motor drives the impeller to rotate at high speed, the liquid at the center of the impeller is flung outward due to centrifugal force, thereby gaining energy and being discharged through the pump’s outlet pipe. After the liquid at the center of the impeller is pushed toward the outer edge of the impeller by centrifugal force, a low-pressure area is created there; fluid is then drawn into the center of the impeller through the pump’s inlet pipe. As the impeller keeps rotating, the liquid continues to be drawn in and discharged. http://down.hcbbs.cc/attachment/forum/201706/10/203353z7y06fdo70r6eod0.jpg Petrochemical Zone—New Ideas for Energy Saving: The “Creative Thinking” Campaign (Phase 2 is in full swing) http://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1666758 (Source: Haichuan Chemical Industry Forum)
Before starting a centrifugal water pump, it must first be filled with water. When the motor drives the pump impeller to rotate at high speed, the water inside the impeller also rotates. Due to the effect of centrifugal force, the water is forced to flow in a direction tangent to the circumference of the impeller, towards the inlet and outlet pipes. As the water is discharged, a vacuum is created near the rotating shaft inside the pump casing. Under external pressure, water from the inlet pipe is pushed into the pump to fill this vacuum. Therefore, as long as the impeller keeps rotating, water will continuously flow into the pump through the inlet pipe and be discharged from it
A centrifugal pump operates by using the centrifugal force generated by the rotation of the impeller to move water. Before starting a centrifugal pump, it is necessary to fill the pump casing and the suction pipe with water. Then the motor is started, causing the pump shaft to drive the impeller and the water to rotate at high speed. Under the effect of centrifugal force, the water is thrown toward the outer edge of the impeller and flows through the channels in the volute-shaped pump casing into the pressure pipeline of the water pump. At the center of the water pump impeller, a vacuum is created as water is flung outward due to centrifugal force; under atmospheric pressure, water from the suction tank is forced into the pump casing. The continuous rotation of the impeller causes water to flow in and out under its action, thereby achieving the purpose of transporting water.
The simple working principle of a centrifugal pump: When the impeller rotates at high speed, centrifugal force is generated. This force acts on the liquid, giving it large amounts of kinetic energy and static pressure energy. At the same time, a negative pressure is created at the center of the impeller, which draws the liquid into its flow channels. The liquid is then thrown out at high speed in all directions. As the impeller continues to rotate, the liquid is continuously drawn in and discharged.
Before starting the centrifugal pump, it must be filled with water. The motor drives the impeller to rotate, and the centrifugal force generated throws the water out, creating a vacuum. The water in the tank is then drawn into the pump casing. As the impeller keeps rotating, water continues to flow in and out
The material is continuously flung out, while the low-pressure area in the middle continuously draws in material
A centrifugal pump transfers the mechanical energy of the prime mover to the liquid by means of the action of the rotating impeller on the liquid. As the fluid moves from the inlet to the outlet of the impeller, both its kinetic energy and pressure energy increase. The fluid discharged by the impeller passes through the discharge chamber, where most of its kinetic energy is converted into pressure energy; this fluid is then sent along the discharge pipeline. At the impeller’s inlet, a vacuum or low pressure is created as a result of the fluid being discharged. Under the effect of the surface pressure (atmospheric pressure) in the liquid reservoir, fluid is forced into the impeller’s inlet. Thus, the rotating impeller continuously draws in and discharges fluid.
A centrifugal pump transfers the mechanical energy of the prime mover to the liquid by means of the action of the rotating impeller on the liquid. As the fluid moves from the inlet to the outlet of the impeller, both its kinetic energy and pressure energy increase. The fluid discharged by the impeller passes through the discharge chamber, where most of its kinetic energy is converted into pressure energy; this fluid is then sent along the discharge pipeline. At the impeller’s inlet, a vacuum or low pressure is created as a result of the fluid being discharged. Under the effect of the surface pressure (atmospheric pressure) in the liquid reservoir, fluid is forced into the impeller’s inlet. Thus, the rotating impeller continuously draws in and discharges fluid.
As the liquid flows from the inlet to the outlet of the centrifugal pump impeller, both its velocity and pressure energy increase. The liquid discharged by the impeller passes through the discharge chamber, where most of its velocity energy is converted into pressure energy, after which it is sent along the discharge pipeline. At this time, a vacuum or low pressure is created at the impeller inlet due to the discharge of liquid; under the effect of the surface pressure (atmospheric pressure) in the water tank, the liquid is forced into the impeller’s inlet. Thus, the rotating impeller continuously draws in and discharges liquid.
Main working principle: (1) The impeller rotates driven by the pump shaft, doing work on the fluid located between the blades; due to centrifugal force, the fluid is thrown from the center of the impeller toward the periphery. When the fluid reaches the outer periphery of the impeller, the flow velocity is very high. (2) The pump casing collects the liquid ejected from between the blades; this liquid flows within the casing along spiral-shaped channels that gradually widen, converting the fluid’s kinetic energy into static pressure energy and thereby reducing energy losses. Therefore, the function of the pump casing is not only to collect liquid; it is also an energy conversion device. (3) Principle of liquid suction: Thanks to the high-speed rotation of the impeller, the liquid at the center of the impeller is forced to be ejected at high speed, thereby creating a low pressure at that center. The liquid in the sump is thus continuously sucked up
A centrifugal pump transfers the mechanical energy of the prime mover to the liquid by means of the action of the rotating impeller on the liquid. As the fluid moves from the inlet to the outlet of the impeller, both its kinetic energy and pressure energy increase. The fluid discharged by the impeller passes through the discharge chamber, where most of its kinetic energy is converted into pressure energy; this fluid is then sent along the discharge pipeline. At the impeller’s inlet, a vacuum or low pressure is created as a result of the fluid being discharged. Under the effect of the surface pressure (atmospheric pressure) in the liquid reservoir, fluid is forced into the impeller’s inlet. Thus, the rotating impeller continuously draws in and discharges fluid.