The experiments familiarise students with various pump types, such as centrifugal and positive displacement pumps.
The trainer includes two centrifugal pumps, one piston pump as a positive displacement pump and a self-priming side-channel pump. The side-channel pump works primarily as a centrifugal pump and, depending on liquid level, can also act as a positive displacement pump. This means, as a special feature, the side-channel pump also permits gases to be pumped.
The pump being investigated pumps water in a closed circuit. In the process, the performance data of the pump and pressure losses in the pipeline are recorded. The centrifugal pumps can also be operated in parallel or in series configuration. Each pump is driven by a separate three-phase AC motor. The speed of the motors for the centrifugal pumps is variably adjustable by a frequency converter. All motors are mounted on swivel bearings, so the torque can be measured by way of a force sensor, enabling the mechanical drive power output to be determined.
Learning Objectives And Experiments
- Investigation and comparison of the operating behaviour of various pump types:
- Centrifugal pumps
- Piston pump (positive displacement pump)
- Side-channel pump
- Recording a pump characteristic curve
- Recording a system characteristic curve
- Determining efficiency
- Investigation and comparison of parallel and series configuration of centrifugal pumps
- Comparison of pump types
Specification
- Experiments relating to key issues in pump engineering
- Comparison of various pump types: centrifugal pump, piston pump, side-channel pump
- Operation of centrifugal pumps in parallel or series configuration
- Free position for additional pump
- Three-phase AC motors for centrifugal pumps and additional motor with variable speed by frequency converter
Technical Specification
- 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
