• 1. Stage 2-cylinder compressor driven by frequency controlled electric engine with speed- and torque-measurement.
• 2. Stage 1-cylinder compressor driven by frequency controlled electric engine with speed- and torque-measurement. Equipped for indication.

The two compressors can be operated in single-, series- and parallel circuit.
Inter- and after-cooling with water is temperature controlled.
The vessel-pressure is controlled automatically.

Measuring systems :

The measuring devices are digitally connected to the internal controller, sending data to the comprised portable PC. Stand control and data acquisition is performed by Windows-software. Measured quantities are:

• Temperatures
• Volume flow-rate of cooling water
• Torque and speed
• Air-mass
• Pressures
• PID-based control of inter- and after-cooling. The controller's parameter can be set by the software.

Technical details:

Dimensions: 3m x 1.8m x 0.65m
Weight: 350 kg

Supplies:

400V 3-phase AC 2.5 kW, cooling water

• 1. Stage 2-cylinder compressor driven by two-speed motor with electric power measurement.
• 2. Stage 1-cylinder compressor driven by frequency controlled electric engine with speed- and torque-measurement. Equipped with indication device.

The two compressors can be operated in single-, series- and parallel circuit.
Inter- and after-cooling with water is temperature controlled.

Measuring systems:

The measuring devices are digitally connected to the internal controller, sending serial data to the comprised portable PC. Stand control and data acquisition is performed by Windows-software. Measured quantities are:

• Temperatures
• Volume flow of cooling water
• Mechanical power calculated from the measured quantities torque and speed
• Air-mass
• Pressures
• PID-based control of inter- and after-cooling. The controller's parameter can be set by software.

Technical details:

Dimensions: 3m x 1.8m x 0.65m
Weight: 350 kg

Supplies:

400V 3-phase AC 2.5 kW
Cooling-water

This new designed test-stand provides a great number of experiments concerning losses caused by friction and restriction in dynamic fluids. Further forces are measured caused by 90° and 180° deflections.

Build-up:

The unit consists of:

• 60 Liter-reservoir
• Pump
• Distributing pipe
• 10 independent Pipelines
• Collecting pipe

• Pipe bends
• elbows
• reductions
• expansions
• different valves
• orifice plate
• nozzle in acryl

Test stand bases on a transparent centrifugal pump with measuring systems to determine its characteristics. The impeller is visible and can be interchanged quickly with another different impeller type. Further it is possible to perform fluid dynamical investigations on elements like pipe bends, elbows, reductions, expansions, valves, nozzles, ventury tube, pitot-static tube.

Measuring systems :

The measuring devices are digitally connected to the internal controller, sending serial data to the comprised portable PC. Stand control and data acquisition is performed by Windows-software. Measured quantities are:

• Flow measurement with rotameter and impeller impulses
• Dynamic and static pressures
• Torque and speed of the pump-motor

New:

Transparent Screwspindle Pump , delivery 4m³/h at 1500 rpm
Screw can be interchanged with Cntrifugal pump. It is connected easily to the electric motor drive. Inlet and outlet are screwed to the normal pipework.

Teststand contains principles of water working- and power machines in singular way. The housings are transparent.

Measure and control -technics:
• torque , brake is mounted on
• a swiveling table
• speed, incremental method
• pump speed with handwheel
• flow rate , magnetic
• pressure , piezoresistive cell
• Impuls on the nozzle see right

Measure data are read on display or on PC screen. Seriall data transfer see Windows-program

Water brake is supplied separately for use with other machines. Technical Data of the brake: power 1,5- 25 kW speeds up to 10000 rpm

This moveable test stand bases on a pump-turbine with variable, during run adjustable blades in rotor and stator. The Centrifugal pump in the circle is the feeder-pump. It serves also as restrictor and operates as a (non-perfect) centripetal turbine. Flow (Cavitation)- observations can be made through the perspex pipe section. The 4-quadrants frequency speed control for the axial- and radial-machine makes a restrictor valve dispensable and allows axial pump performance near zero pressure.

Pump turbine aggregate:
Visit Pump turbine aggregate

Measuring systems:

• Torque of the axial engine with strain gage sensor on the swivel engine
• Rotational speeds
• Volume-flow
• Pressures
• Electric energy consumption and production for both machines

The axial type hydraulic machine is the predestined object for studies in mechanical and civil engineering. Incorporated in a pipework, with supply pump or vessel in some height and equipped with flow-meter and pressure transmitter then a test stand is created which is an ideal field for basic experimenting.

• Axial flow type 100mm diameter
• Hub only 40mm diamete
• Flow-rate 30-70 m³/h
• Rotor blade adjustment > 30° during operation
• Stator blades synchronously adjustable +/- 30°
• Perspecs pipe window with 5 relevant pressure tappings
• Electric motor/generator swiveling with torque meter
• Frequency converter for speed control
• LC-display and interface for torque and speed

Supply:

3~ 400V , 4 kW

Please have a look at our complete "Pump-turbine test stand".

Teststand Radial Fan to determine the characteristica icluding efficiency at all speeds

Speedcontrolled drive and torque measurement

Blower tunnel with flow measure instrumentation and throttle at the end.

Flow measurement with Pitot / Static tube and differential pressure transmitter
Pt100 Thermometer is installed for the determination of air density.

Multifunctional display und incremental turning / pressing knob serve for the displaying of the measure values and for hand control.

Test stand bases on a transparent centrifugal pump with measuring systems to determine its characteristics.

Technical details of pump:

Further properties :

• Measurement of shaft power
• Stepless adjustable speed
• Engine is removable and usable for other purposes
• Transparent pump: Casing consists of perspex

Device for Verification of Boil Mariotte´s law: p x V =constant

Description:
Volume above left water column is the test volume. Right water column can be driven into left one by help of an air compressor which pumps air onto right column. That way test Volume left above water column is raised or diminished resulting in compression or vacuum.
Inside the cabinet are transmitters for pressure and displacement as well as the compressor itself.
Quick hose connections of compressor are on front panel.