This is an illustration model of Archimedes' screw.
"Archimedes' screw, also called the Archimedean screw or screwpump, is a machine historically used for transferring water from a low-lying body of water into irrigation ditches. Water is pumped by turning a screw-shaped surface inside a hollow pipe."
Today is still used as a pump, in its original form in Egypt, and how small electric hydro generator in some engineering applications.
this text above are a extract of the Wikipedia:
wiki article: Archimedes' screw
Caution this model is very dangerous for children under 8 years, see intructions
Version: V1.001 - 05/13/2015 - Corrected interference of the screw with the support. Versions V1_001. uploaded.
source of data: Rorres, Chris: "The turn of the Screw: Optimum design of an Archimedes Screw", ASCE Journal of Hydraulic Engineering, Volume 126, Number 1, Jan.2000, pp. 72–80.