The rotor, fixed to the main shaft, starts rotating with the drive and moves the vanes. Thereby the flow starts from the inlet.
The liquid fills all the spaces in the casing. Between the casing, the rotor and the reciprocal vanes, the liquid is locked up.
The liquid sweeping by the vanes is forced to flow in the direction of rotation.
(The signs on the rotating parts give clue about the rotate operation.) |