Torque measurement for the dynamometer is by load cell, whilst speed measurement uses a magnetic type pick up. Pump suction and delivery heads are monitored by pressure transducers and the flowrate in the circuit can be accurately determined using the built in flow meter. The testing of such a wide range of pumps on a single test unit is made possible by the provision of quick release hose and drive couplings together with quick release pump fixing clamps, enabling changeover to be made easily and efficiently. All data is logged and displayed on the P.C. that is supplied with the unit. Data can be exported to a spreadsheet for processing.
A positive displacement Gear Pump is supplied as standard with the following pumps available as optional extras:
A positive displacement Vane Pump 40 lpm at 1500 rpm
A rotodynamic Channel Impeller Pump 26 lpm at 3000 rpm
A rotodynamic Centrifugal Pump - duty point of 120 1pm and 0.5 bar at 3000 rpm (max. flow at zero head 140 lpm, max head at zero flow 1.1 bar at 3000 rpm). A rotodynamic Axial Pump - maximum flow 50-60 1pm at 0.2 bar at 10000 rpm. (max head at zero flow 0.5-1 bar with severe cavitation), impeller diameter 38 mm.
A positive displacement Piston Pump - stroke 19.5 mm, bore 20 mm, flow 19 1pm at 1040 rpm, maximum pressure head 67 bar, limited by relief valve to 5 bar
Experimental Capability:
Determination of volumetric and total efficiency
Variation of pump capacity with speed
Head / flow rate plots at various constant speeds
Measurement of brake power input
Cavitation
Specific speed analysis.
