Experimental test rig designed to analyse pumping station operation controlled by pressure at different key points

The operation of pumps within a pumping station can be controlled by the Pressure Set Point (PSP) value compared to the reading of a pressure sensor placed either at the exit of the pumping station, on the main discharge pipe (classical PSP method), or at a critical/monitoring point within the water distribution network (termed further as remote-control PSP method). We designed and built an experimental test rig, allowing to study both control methods, in the attempt to check the advantage of the remote-control PSP method, with respect to the classical PSP method, since governing equations show that they are equivalent. The design relies on the theoretical approach and numerical results presented within this paper.

Experimental Investigations Concerning Friction from Threaded Assemblies

In this research an experimental test rig and method to measure friction torque from screw-nut assemblies is presented. The experimental test rig uses to measure friction torque an elastic cylinder bush with strain gauge transducers. The frictions torque and the traction force from the threaded assembly are transmitted to the elastic cylinder bush and produce elastic deformations. The elastic cylinder is calibrated in order to establish a correlation between elastic deformation and force of solicitation. In order to measure the experimental data the MGCPlus data acquisition system is used. The experimental results obtained are presented, consisting in the dependence between friction torques and axial traction force occurred in the screw.