The main parts of the vertical centrifugal pump are composed of impeller, pump body, pump cover, mechanical seal, impeller nut, air release valve, water retaining ring, motor and so on. The impeller is one of the core components of the centrifugal water pump. The material of the impeller can generally be divided into cast iron, aluminum alloy, plastic, stainless steel, brass, etc. The more common centrifugal pump impellers are open impeller, semi-open impeller and closed impeller.
Sort by work style:
The single suction impeller can suck liquid from one side.
The double-suction impeller can suck liquid from both sides, and the corrosion resistance of the double-suction impeller is better than that of the single-suction impeller.
Classification by leaf form:
1. The open impeller has only blades and part of the back cover or no back cover.
2. The semi-open impeller is composed of blades and a rear cover.
3. The closed impeller is composed of blades and front and rear cover plates.
The open and semi-open impellers in the vane impeller are more convenient in the casting process, and can pump the medium containing certain solid particles, but the solid particles will wear and corrode the flow channel, which will make the working efficiency of the centrifugal water pump somewhat reduce.
The efficiency of the closed impeller is relatively high in operation, and it can run stably for a long time. The axial thrust of the centrifugal pump is relatively small, and the closed impeller is not easy to pump the sewage medium containing large particles or long fibers.
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