Several classification types of impeller

Release time:

2022-04-25

Impellers can be classified by shape into the following categories: Centrifugal impeller: The blade shapes of centrifugal fan impellers are veneer type, arc type, and airfoil type. The airfoil blades of the centrifugal impeller have good aerodynamic characteristics, high efficiency, good strength, and high rigidity. The disadvantage of centrifugal impellers is that the manufacturing process is complicated, and when the gas with high dust concentration is transported, the blades are easy to wear. The flat-plate straight blades of centrifugal impellers are simple to manufacture but have poor flow characteristics. Compared with airfoil blades, flat-plate curved backward blades have lower efficiencies near the highest efficiency point, and the efficiencies at other operating points are quite close.

Several classification types of impeller

Impellers can be classified by shape into the following categories:

Centrifugal impeller:
The blade shapes of centrifugal fan impellers are veneer type, arc type, and airfoil type. The airfoil blades of the centrifugal impeller have good aerodynamic characteristics, high efficiency, good strength, and high rigidity. The disadvantage of centrifugal impellers is that the manufacturing process is complicated, and when the gas with high dust concentration is transported, the blades are easy to wear. The flat-plate straight blades of centrifugal impellers are simple to manufacture but have poor flow characteristics. Compared with airfoil blades, flat-plate curved backward blades have lower efficiencies near the highest efficiency point, and the efficiencies at other operating points are quite close.

cheapest impeller

Forward impeller:
Forward impellers generally use arc-shaped blades, and in the rearward impellers, airfoil blades are mostly used in large fans. For the induced draft fan of coal-fired boilers with low dust removal efficiency, the impeller can use arc-shaped or flat-shaped blades. There are many centrifugal fans with flat blades.

Compression impeller, also known as working wheel. The only element in a centrifugal compressor that does work on the airflow. The most important part of the impeller rotor. It is generally composed of parts such as roulette, wheel cover, and blade. Under the action of the impeller blades, the gas rotates at a high speed with the impeller. The gas is subjected to rotating centrifugal force and diffused flow in the impeller, which increases the pressure after it passes through the impeller.

Common impeller materials: cast iron, bronze, stainless steel, manganese bronze, Monel, INCONEL, and non-metallic materials. Non-metallic material composition: PPS plastic, phenolic resin, etc.

Through the above introduction and analysis of the impeller, hope it helps you.

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