Displacement machine

A positive displacement machine is a fluid energy machine in which the fluid flows through the machine in individual volumes of the same size. It differs in this respect from the turbomachine , which is continuously flowed through by a fluid.

The two main subsets of the displacement machine are

• the piston engines and
• the screw machines ( screw pumps , screw motors ), these are occasionally also listed as a subspecies of the rotary piston machines ( rotary piston pump , rotary piston engine ).

Web links

• [1] Fluid technology department, Technical University of Dortmund: Research focus a. a. Screw machines; How the screw machine works