Compression impeller also known as a work wheel. The only element in a centrifugal compressor that works on air flow. The main component on the rotor. It is generally composed of components such as wheel discs, wheel covers, and blades. Under the action of the impeller blades, the gas rotates at high speed with the impeller. The gas is subjected to the centrifugal force of rotation, as well as the diffusion flow in the impeller, which increases its pressure after passing through the impeller.
Requirements for impellers:
(1) Can provide a larger energy head;
(2) The loss of gas flow through the impeller should be small, that is, the efficiency of gas flow through the impeller should be high;
(3) When the gas flows out of the impeller, the parameters are appropriate to minimize the flow loss when the gas flows through the fixed components behind;
(4) The impeller type can achieve a wide range of stable operating conditions and high efficiency areas in the performance curve of the stage or the entire machine. It is often divided into closed, semi open, and open impellers.
In wind turbines, the impeller is composed of a hub and blades. The wind passes through the impeller, driving it to rotate, thereby driving the generator to rotate and converting wind energy into electrical energy. At this point, it is required to have a sufficiently large windward surface when the impeller rotates to extract enough energy from the wind; At the same time, when the wind speed is too high, it is necessary to be able to automatically adjust the windward angle of the blades to avoid damage to the machinery due to excessive force.
Common materials for impellers
Cast iron, bronze, stainless steel, manganese bronze, Monel alloy, INCONEL, and non-metallic materials.
Artison is a supplier of aerospace components; Products include impeller, turbine, combustion chamber, fastener, etc.
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