Archimedean screw pumpPosted by freeamfva on March 10th, 2023 Archimedean screw pump The Archimedean screw pump is used for constant-pressure lifting of a fluid to a given geodetic height with the aid of a rotating screw (true helicoid), which works on the principle of the irrigation device invented by Archimedes. See Fig. 1 Archimedean screw pump.To get more news about screw pump stator, you can visit hw-screwpump.com official website. Depending on the immersion depth of the screw's bottom end, the volume flow rate of the Archimedean screw pump adjusts automatically within certain limits as the volume of liquid in the individual flights changes. This operating principle presupposes that the screw is constantly submerged in the liquid to at least half the diameter of its leading screw passage and that the clearance gap width between the screw and the sheet steel or concrete trough is not too large (so as to minimise leakage). The lower bearing is submerged (see Plain bearing) and must be lubricated with fresh water or grease. The upper bearing often is a rolling element bearing and also absorbs axial forces The gear unit is coupled to the upper end of the screw. Archimedean screw pumps are capable of pumping heavily contaminated surface water or sewage, and even sand if they are specially designed for this purpose. The head is purely geodetic and ranges up to 6 m at efficiencies between 60 and 80 %. Depending on the flow rate the screw diameter can be up to several metres. Archimedean screw pumps are simple, adapt easily to operating conditions and operate economically. However, they frequently have to compete with submersible motor pumps. Like it? Share it!More by this author |