Impellor
An impellor (also spelt impeller) is a bladed rotor, most often used to describe an apparatus used to increase pressure and flow of fluids. It is also the term used to describe the central bladed component of a fan which is used to increase pressure and flow of air. In general there are axial impellors, which increase flow on the same axis as the incoming flow feed and centrifugal impellors, which increase flow at an angle to the incoming flow (normally 45 degrees).
Impellors are a key component of any pump system and can have a variety of designs, they are the opposite of a turbine which extracts energy from a flowing fluid or gas and this reduces its pressure in the process. Types of impellors found in pump systems might include; open, semi-open, closed, vortex and cutter impellors.
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