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Performance characteristics of multistage centrifugal pumps
source:Industry News release time:2021-08-21 Article author:Rosit Popular:Air band saw
Compared with single-stage pumps, multi-stage centrifugal pumps differ in that they have more than two impellers, which can absorb and press water in multiple stages, so as to lift the water to a very high position. The head can be adjusted according to Increase or decrease the number of pump impeller stages as needed. Multi-stage pumps are mainly used for mine drainage, urban and factory water supply. Agricultural irrigation is rarely used. It is only suitable for high-lift, small-flow high-mountainous water pumping to solve the difficulty of drinking water for humans and animals. There are two types of multi-stage high-center pumps: vertical and horizontal. The pump shaft of the multi-stage centrifugal pump is equipped with two impellers connected in series. Compared with the general single-stage centrifugal pump, it can also achieve a higher head; Compared with reciprocating pumps such as piston pumps and diaphragm pumps, it can also pump larger flow rates. Multi-stage centrifugal pumps have high efficiency and can meet the needs of high-lift and high-flow conditions. They are widely used in petrochemical, chemical, electric power, construction, fire protection and other industries.
Due to its own particularity, compared with single-stage centrifugal pumps, multi-stage centrifugal pumps have different and higher technical requirements in terms of design, use, maintenance and repair. It is often people's negligence or ill-consideration in some details that cause frequent abnormal wear, vibration, shaft holding and other failures after the multi-stage centrifugal pump is put into use, and also cause downtime.
When the centrifugal pump is working, the liquid fills the pump casing and the impeller rotates at a high speed. The liquid produces high speed under the action of centrifugal force. The high-speed liquid passes through the gradually enlarged pump casing channel, and the dynamic pressure head is transformed into a static pressure head.
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