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Working principle of centrifugal pump

浏览次数:128   发布日期:2020-05-15

Working principle of centrifugal pump
  The working principle of the centrifugal pump is: relying on the impeller rotating at high speed, the liquid obtains energy under the action of inertial centrifugal force to increase the pressure. Before the pump works, the pump body and inlet pipe must be filled with water to prevent cavitation. When the impeller rotates rapidly, the blades prompt the water to rotate quickly. The rotating water flies out of the impeller under the action of centrifugal force. After the water in the pump is thrown out, the central part of the impeller forms a vacuum area. Under the action of atmospheric pressure (or water pressure), the water of the water source is pressed into the inlet pipe through the pipe network. In this way, continuous pumping can be achieved. It is worth mentioning here: before starting the centrifugal pump, it must be filled with water in the pump casing before starting, otherwise it will cause the pump body to heat, vibrate, reduce the amount of water output, and damage the pump (referred to as "cavitation") Causing equipment accidents! The so-called cavitation refers to: when the centrifugal pump is started, if there is air in the pump, due to the low density of the air, the centrifugal force generated after rotation is very small, so the low pressure formed in the central area of ​​the impeller is not enough to reduce the liquid level The liquid lower than the pump inlet is sucked into the pump and cannot deliver fluid.
  There are many types of centrifugal pumps, and the common classification methods are as follows:
  1. According to the impeller suction method: single suction centrifugal pump double suction centrifugal pump;
  2. According to the number of impellers: single stage centrifugal pump multistage centrifugal pump;
  3, according to the impeller structure: open semi-open impeller centrifugal pump impeller centrifugal pump impeller enclosed;
  4, according to the working pressure: the low-pressure centrifugal pump high pressure centrifugal pressure centrifugal pump;
  5, divided by the shaft position: Horizontal centrifugal pump side vertical centrifugal pump.

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