The unit consists of an industrial type centrifugal blower with a motor and an inverter, inlet and outlet ducts with flow straighteners, a damper, and measuring instruments. Centrifugal Blower Test Set a bench top unit for studying the centrifugal blower characteristics. Extra blades are provided for comparison study.
Experiments:
Blower input, output and efficiency.
Comparison of backward, radial, and forward blade impellers.
Inlet and discharge pressures vs blower speed.
Flow rate vs speed.
Aluminium cope and drag box, screwable
Pouring ladle with 5 kg Woods metal (melting point 70C)
Worksheets for instructor and students
Pattern plate with pattern of epoxy-resin in one piece
Core die, core iron
15 kg moulding sand in a separate container
Moulding tools
Thermometer.
Accurate section of a centrifugal clutch, moving parts type used in Mopeds.
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A small-scale multi-stage centrifugal compressor demonstration unit, comprising of an inlet duct, the compressor, an outlet duct and an adjustable aperture, all mounted on a stainless steel base.
Equipped with electronic measurement sensors for head pressure, flow rate (via orifice plate) and air temperature.
Seven stages in the compressor.
Full theoretical back-up together with a student questions and answers session.
Supplied with software providing full instructions for setting up, operating, calibrating and performing the teaching exercises. Facilities for logging, processing and displaying data graphically.
Capable of being linked to a PC (not supplied) via a dedicated interface console (an essential accessory).
Experiments
Determination of the specific speed of the fan Essential Base Unit
Performance of a centrifugal fan
Universal Dynamometer
Variation of fan performance with type of impeller
Variation of fan performance with speed
Non-dimensional performance curves.
Recommended Ancillaries:
Pipe Flow and Nozzle Kit
VDAS-F (frame mounted version of the Versatile Data Acquisition System).
The compressor is driven by a variable speed d.c. electric motor with a belt gearing-up system of O to 4000 RPM with a transmission ratio of 7.5/1.If is possible to read the pressure values, upstream and downstream of the compressor, by means of 2 U shaped differential manometers. The industrial type compressor used in this apparatus is a single stage machine having a 127 mm dia impeller and an aluminium scroll with fluid threads rectifier. Thermometers are inserted into the circuit in order to read the air temperature before and after the passage through the centrifugal compressor. At the maximum speed of over 29,000 RPM, if develops a downstream pressure of about 230 mmHg with a max air capacity of 1230 kg/h.
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The Centrifugal Contacts are loaded on a spring board installed on the coupling shaft, and is designed to demonstrate the braking of motor. This unit must be included in the mechanical load assembly jointly with the mounting base, the magnetic shoe brake and an inertia wheel. The brake is controlled by a contact that is normally open or closed.
Educational Advantages:
Included in the Mechanical Load Assembly
Designed to demonstrate the braking of motor.
This unit must be included in the mechanical load assembly jointly with the mounting base, the magnetic shoe brake and an inertia wheel. The Centrifugal Contacts are loaded on a spring board installed on the coupling shaft, and is designed to demonstrate the braking of motor. The brake is controlled by a contact that is normally open or closed.
Educational Advantages:
Included in the Mechanical Load Assembly
Designed to demonstrate the braking of motor.
Supplied with software providing full instructions for setting up, operating, calibrating and performing the teaching exercises. Facilities for logging, processing and displaying data graphically.
Capable of being linked to a PC (not supplied) via a USB interface console (an essential accessory), which does not require internal access to the computer. Also allows interfacing to other software packages.
Offers a complete teaching package of coursework and laboratory investigation, complete with a student questions and answers session.
Capabilities of Centrifugal Fan Demonstration Unit
Measurement of fan efficiency and estimation of impeller power efficiency
Measurement of constant-speed machine performance in terms of static total Measurement of performance at constant speeds
pressures, rotor speed and motor shaft power, as a function of inlet flow
Comparison of student calculations with computer results
Introduction to similarity laws for scale-up.
Experiments:
Determination of the specific speed of the fan
Performance of a centrifugal fan
Variation of fan performance with type of impeller
Variation of fan performance with speed
Non-dimensional performance curves.
The unit is assembled with a trolley mounted frame and does not require any maintenance. The group is supplied with manuals which describe all parts of the unit, the installation and utilisation procedures, as well as many exercises with the relative results. It is available an automatic data acquisition and analysis system for Personal Computer, which allows to take the measurements automatically, to plot the curves on screen or print them out, to store the experimental data on disk or print them. The Centrifugal Fan Study Unit allows the study of typical parameters of an industrial centrifugal fan. Measurements can be performed varying the working conditions and compared with data resulting from the theory.
The Centrifugal Fan Study Unit is available in two versions:
Centrifugal fan study unit - Computerized version
Centrifugal fan study unit - Standard version
Centrifugal Force Apparatus
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Unit mounted on an anodized aluminum structure with panels made of painted steel.
Motor:
Speed range: 0-600 rpm.
A transparent protective cover, made of plastic, provides protection against the rotating parts and enables different experiments to be observed.
Five different path radii: 25mm, 50mm, 75mm, 100mm, 125mm.
Four different rotating weights (made of stainless steel) of 55g., 80g., 105g. and 130g.
The motor speed is controlled through the electronic console and the value of the speed is visualized in the digital display
Force sensor, range: 0-25N, resolution: 0.1N.
Centrifugal Governors use the properties of centrifugal force to control the speed of a machine. These mechanisms are differentiated into those governors that use weights and those that use springs. Due to centrifugal force, a rotating flyweight mass has the tendency to move away from the axis of rotation and is prevented by counteracting mechanisms.
Features:
Determination of characteristic curves and setting curves of different centrifugal governors
Visualisation of the effect of centrifugal force
How various centrifugal systems work
Centrifugal Machinery Model
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Dimension (L*W CM): 27*10
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Centrifugal Precipitator
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Experiments:
Non-dimensional performance characteristics
Flow measurement using a Ventur
Centrifugal pump performance and characteristics, typically head against flow and efficiency against flow
Variation of pump performance with speed
Variation of pump performance with inlet pressure.
This auxiliary pump is intended to be used inconjunction with the basic Hydraulics Bench. This accessory comprises a variable speed pumpassembly and independent discharge manifold interconnected by flexible tubingwith quick release connectors. The pump speed is varied by an inverter drive. An independent discharge manifold incorporates apressure gauge and flow control valve prior to a discharge pipe with diffuser. A compound pressure gauge is mounted on the pump inlet and a pressuregauge is mounted on the pump outlet. Themotor speed, output voltage and motor current can be monitored on the inverterdisplay. The auxiliary pump is mounted on a support plinthdesigned to be positioned on the floor besides the hydraulics bench, adjustable feet allowing levelling.
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A small-scale centrifugal pump demonstration unit, comprising of a water reservoir, the pump, control valves and interconnecting pipe work all mounted on a stainless steel base.
Transparent pump volute for visibility
Supplied with software providing full instructions for setting up, operating, calibrating and performing the teaching exercises. Facilities are provided for logging, processing and displaying data graphically. Full theoretical back-up is included together with a student questions and answers session.
Equipped with electronic measurement sensors for pump head pressure, suction, flow-rate and water temperature.
Capable of being linked to a PC (not supplied) via the interface console (available as an essential accessory).
