1, closed impeller: The blades of this impeller have cover plates at both ends, and the runner of the impeller is closed. The closed impeller is mainly used for conveying high-lift and clean media.
2. Semi-open impeller: This impeller consists of blades and the back cover of the wheel disc. Compared with the closed impeller, it has no front cover and the impeller runner is semi-closed. The hydraulic efficiency of this kind of impeller is not very high, and it can be used to transport media containing impurities.
3. Open impeller: This kind of impeller generally has only blades, without front and rear cover plates, and its impeller runner is completely open, which can be used to transport viscous media, such as fiber media.
Second, what is a centrifugal pump impeller?
1, centrifugal pump impeller is a component that transfers energy to the fluid, for example, it can convert mechanical energy into kinetic energy of the fluid, it can suck the fluid in the inlet pipeline and discharge the fluid in the pump. Generally, the impeller of centrifugal pump has 6- 12 blades. The more blades, the better. The more blades, the higher the fluid velocity, the greater the blade friction and the more serious the cavitation of the impeller.
2. The materials of centrifugal impeller are various, and the common impeller materials are cast iron, cast copper, stainless steel, aluminum cast iron, copper alloy and cast steel. When selecting impellers, we should choose products with suitable materials according to the medium it conveys. For example, for conveying corrosive fluid media, we can use impellers made of 304 stainless steel and 3 16 stainless steel or plastic. If it is used to transport oil, you can choose a brass impeller or the like.
There are three kinds of impellers for centrifugal pumps. Let me introduce them to you here. I hope you know something about centrifugal pump impeller.