So this is what you're like, a centrifugal pump
centrifugal pumps are known as the heart of water systems in the chemical industry, and their importance goes without saying. Today, we’ve prepared a wealth of practical content—be sure to save it for future reference.
What is a centrifugal pump?
The Centrifugal Water Pump is the most commonly used type in refrigeration and air conditioning engineering. Its characteristic lies in the high-speed rotation of the impeller, which imparts significant kinetic energy to the fluid. The kinetic energy is then converted into pressure energy through the varying cross-section of the volute at the outlet flow channel. The flow of water within the impeller is primarily influenced by centrifugal force.
centrifugal pumps are the most widely used in chemical production due to their outstanding advantages, including a broad performance range (covering flow rate, head, and adaptability to medium properties), compact size, simple structure, ease of operation, uniform flow, and long service life.
The working principle of centrifugal Pumps
During operation, the centrifugal pump relies on the high-speed rotation of the impeller, where the liquid gains energy and increases pressure under the action of inertial centrifugal force. Before starting, the pump body and inlet/outlet pipelines must be filled with liquid medium to prevent cavitation.
When the impeller rotates rapidly, the blades cause the medium to rotate quickly. The rotating medium is flung out of the impeller under the action of centrifugal force. After the water inside the pump is expelled, a vacuum area forms in the central part of the impeller. This continuously draws in liquid while also imparting energy to the drawn-in liquid, discharging it. The centrifugal pump thus operates continuously in this manner.
Centrifugal pumps are widely used in various applications, including industrial, agricultural irrigation, municipal water supply, power plant circulating water supply, and urban wastewater treatment.
The basic structure of a centrifugal pump
The impeller, composed of several curved blades, is placed inside the pump casing with a volute channel.
The impeller is fastened to the pump shaft, which is connected to the motor and can be rotated by the motor.
The side of the pump casing serves as the discharge outlet, connected to the discharge pipeline.
What are the classifications of centrifugal pumps
Centrifugal pump products are generally classified based on their structural characteristics, with multiple classification methods including by working pressure, by the number of working impellers, and by impeller water intake method.
1. According to working pressure:
Low-pressure pump: pressure below 100m
Medium-pressure pump: pressure ranges from 100 to 650 meters
High-pressure pump: pressure exceeds 650m
2. By the number of working impellers:
Single-stage pump: It means there is only one impeller on the pump shaft.
Multi-stage pump: It refers to a pump with two or more impellers on the pump shaft.
3. According to the pump shaft position
Horizontal pump: the pump shaft is positioned horizontally.
Vertical pump: The pump shaft is positioned vertically.