MR-HM 362 Comparison of pumps Vocational Training Equipment Hydrodynamics Lab equipment Description • investigation of the operating behaviour of centrifugal, piston andside-channel pumps • all pumps driven separately bythree-phase AC motors • centrifugal pumps can be operated in series or parallel configuration The experiments familiarise studentswith various pump types, such as centrifugal and positive-displacement pumps. The HM 362 trainer includes two centrifugal pumps, one piston pump as a positive-displacement pump and a self-priming side-channel pump. The side-channelpump works primarily as acentrifugalpump and, depending on liquid level, canalso act as a positive-displacementpump. This means, as a special feature,the side-channel pump also permitsgases to be pumped. The pump being investigated pumps water in a closed circuit. In the process,the performance data of the pump andpressure losses in the pipeline are recorded. The centrifugal pumps can alsobe operated in parallel or in series configuration. Each pump is driven by a separate three-phase AC motor. The speedof the motors for the centrifugal pumpsis variably adjustable by a frequencyconverter. All motors are mounted onswivel bearings, so the torque can bemeasured by way of a force sensor, enabling the mechanical drive power output to be determined. One free position is likewise equippedwith a reversible three-phase AC motorwith variable speed. This position can beused for mounting of any pump. Experiments demonstrate the basic operating behaviour of various pump types. Relevant measured values can be readon digital displays. At the same time, themeasured values can also be transmitted directly to a PC via USB. The dataacquisition software is included. The performance data of the pump and lossesin the pipeline are calculated by the software and represented by characteristiccurves. The operating point of the pumpcan be determined from these characteristics. Learning objectives/experiments • investigation and comparison of the operating behaviour of various pumptypes: · centrifugal pumps · piston pump (positive-displacementpump) · side-channel pump • recording a pump characteristic curve • recording a system characteristiccurve • determining efficiency • investigation and comparison of parallel and series configuration of centrifugal pumps • comparison of pump types Specification [1] experiments relating to key issues in pump engineering [2] comparison of various pump types: centrifugalpump, piston pump, side-channel pump [3] operation of centrifugal pumps in parallel or seriesconfiguration [4] free position for additional pump [5] three-phase AC motors for centrifugal pumps andadditional motor with variable speed by frequencyconverter [6] GUNT software for data acquisition via USB under Windows 7, 8.1, 10 Technical data Centrifugal pump 2x • max. flow rate (Q): 300L/min • max. head (H): 16,9m • nominal speed: 2900min-1 Three-phase AC motor 2x, for centrifugal pump • power output: 1,1kW Side-channel pump, self-priming, one-stage • Q: 83,3L/min, H: 50m • nominal speed: 1450min-1 Three-phase AC motor for side-channel pump • power output: 1,1kW Piston pump • Q: 17L/min, H: 60m • nominal speed: 405min-1 Three-phase AC motor for piston pump • power output: 0,55kW Three-phase AC motor, additional motor, reversible • power output: 0,75kW • speed range: 750…3000min-1 Measuring ranges • flow rate: 0…500L/min • pressure (inlet): -1…1,5bar • pressure (outlet): 0…10bar • torque: 0…15Nm • speed: 0…3000min -1 • pump electrical power consumption: 0…2kW 400V, 50Hz, 3 phases 400V, 60Hz, 3 phases 230V, 60Hz, 3 phases LxWxH: 2860x1200x1960mm Weight: approx. 430kg Required for operation PC with Windows recommended Scope of delivery trainer, 1 GUNT software CD + USB cable, 1 set of instructional material
