Armfield Engineering Education
CAPTURE FLUID MACHINES
FM51 Series and Parallel Pumps Demonstration Unit - issue 2
Centrifugal pumps are often used together to enhance either the flow rate or the delivery pressure beyond that available from the single pump.
The
unit is designed to demonstrate the operational advantages of parallel
or series operation, depending on the required duty.
Ordering Specification
• A small-scale series/parallel pump demonstration unit,
comprising of a water reservoir, two pumps, control valves and interconnecting
pipework,
all mounted on a stainless steel base.
•
Equipped with electronic measurement
sensors for pump head pressure
(2 off), suction, flow- rate and water temperature.
•
Transparent pump volutes for visibility.
•
Inlet valve throttling demonstrates
air release.
• Supplied with different easily interchangeable impellers.
• Capable of being linked to a PC
(not supplied) via a dedicated interface console.
• Supplied
with software providing full instructions for setting up, operating, calibrating
and performing the teaching exercises. Facilities
for logging, processing and displaying data graphically.
•
Full theoretical
back-up together with a student questions and answers session.
INSTRUCTIONAL CAPABILITIES
> Demonstration of either series, parallel or single pump operation
> Measurement of constant-speed pump performance, including production
of characteristic curves (one pump)
> Comparison of head-flow characteristics with single pump
operation, at inherent speed
> Investigation of impeller styles
> Comparison of student calculations with computer results
Description
Two motor driven centrifugal pumps, mounted on a stainless steel plinth with a water reservoir and pipework for continuous circulation. The pumps can be configured for single pump operation, two pumps in parallel or two pumps in series by using manually operated ball valves. Similarly, manual valves are used to control the flow and facilitate the study of suction effects, including demonstration of air release.
In parallel operation the two pumps draw from a shared inlet pipe of a wider diameter than the pump inlet, reflecting a typical industrial configuration of parallel pumping. Each pump has impellers that can be easily accessed and replaced without tools. The FM51 is delivered with three impellers in total, one with forward curved blades and two with backward curved blades, allowing the students to investigate the effects of impeller characteristics.
Electronic sensors measure the pump outlet pressure of each pump, the shared pump inlet pressure, the flow rate and the water temperature.
The
pump speed of the first pump is accurately controlled by an advanced
electronic inverter within the IFD7
(an essential accessory) and can be varied over the full range. The inverter
also calculates the torque produced at the motor drive shaft, allowing
the power used by the pump to be derived. The second pump runs at inherent
motor speed. This combination of control facilities allows a wide range
of different configurations to be investigated.
The
IFD7 also provides the conditioning electronics for the sensors and allows
their readings to be displayed on the computer software. Connections
to
the IFD7 are a single multi-way connector for the sensors and a connector
for the pump motor drive.
The equipment is provided with advanced education
and data logging software. See the software section of this datasheet
for further details.
PERFORMANCE SPECIFICATION
Max Flow Rate: 2.2 l/sec
(parallel pumping, both pumps 50 Hz)
Max Head: 6.0 m (single pump)
12.0m (series)
Max pump speed 1800 rpm
(pump1)
1500 rpm
(pump 2 nominal)
Motor Power rating 250W
SOFTWARE
Windows based software is supplied with the CAPTURE range of equipment offering a complete teaching package of coursework and laboratory investigation.
The familiar Windows environment allows the student to explore the principles of each machine quickly and easily, highlighting the difference between theoretical and practical measurements, thus providing a good understanding of the principles involved.
This software runs under Windows 98, 2000 or XP operating systems and has
been designed for maximum flexibility and ease of use. Comprehensive ‘Help’
screens guide the student through both the theoretical background and the
practical investigation of the machine under examination. Suggested laboratory
investigations and further questions for the student to answer are included
in the software, together with all the information required to set up and
run the teaching exercises.
SOFTWARE CAPABILITIES
This software includes a range of functions and capabilities designed to make the operation of the equipment and processing of the results more straightforward, and also to enhance student understanding of the subjects being covered.
It includes:
> Diagrammatic representation of the equipment, complete with real time
display of the various sensor outputs
> Presentation screens, giving an
overview of the software, the equipment, the procedure and associated theory
> Detailed ‘Help’ facilities giving in depth guidance
> Automatic data logging of sensor values into a spreadsheet format
> Control over sampling intervals
> Student questions and answers, including a layered ‘Hint’
facility
> Processing of sampled values (this may be linked to the questions and
answers to ensure student understanding)
> Sophisticated graph plotting facilities of both measured and calculated
values, including comparisons taken under different conditions
> Export of data to Microsoft Excel or other spreadsheets
> Links to user defined word processor
> Calibration facility for sensors
> Real time bar graph display of sensor outputs
> Recent history graphical display
TECHNICAL DETAILS
The analogue output data is digitised and transferred to a computer using the standard USB (Universal Serial Bus). This allows any standard modern Windows computer to be used, including notebooks, and does not require any internal access to the computer.
The equipment is supplied complete with a USB lead for connection to the computer.
The FM51 interfaces to the computer using the IFD7 device and the USB port of the computer.
Also available is a software driver that allows the outputs to be read in other software programs, such as Labview.
ESSENTIAL EQUIPMENT
• Armfield IFD7 Interface Unit
• PC with spare USB port
Shipping Specification
Volume: 1.40m³
Gross Weight: 120Kg
Overall Dimensions
Height: 0.59m
Length: 1.01m
Width: 0.58m
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