Cavitation can play a major role in the vibration of pumps during operation. The pump and tank are interconnected by hoses. Valves and manometers in the delivery and intake lines allow various operating conditions to be set. The transparent plastic pump housing provides a view into the interior of the pump during operation. With the accessory set, cavitation can be experimentally induced and its influence on the vibration spectrum investigated. The principal elements of the accessory set are a single-stage centrifugal pump and a storage tank. This enables the formation of cavitation bubbles to be observed.
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For the full operating of this system, it is necessary to connect the item to the hydraulic bench or a suitable hydraulic energy source. The Cavitation Phenomenon system for the demonstration of the cavitation phenomenon is a simple and practical equipment including a Venturi tube where the cavitation phenomenon occurs when we have the depression created by the flow acceleration (Venturi effect). In order to grant easy observation of the phenomenon, Venturi tube is made of methacrylate. The equipment also includes a pressure gauge and a vacuum gauge to measure the generated overpressure and low pressure; a membrane valve is included for precise flow control adjustments.
Performable Experiments:
Observation of the cavitation phenomenon in the Venturi tube.
Calculation of the minimum required water flow necessary to observe the phenomenon.
Calculation and testing of the pressure and temperature conditions in which the phenomenon occurs.
The additional measuring sections Nos. 2, 3 and 4 are exchangeable against the standard measuring section so that the tunnel can be made suitable for a wide range of test work.
The main data of a Cavitation Tunnel with the standard measuring section are as follows:
Contraction ratio of the nozzle 5.96 : 1
Measuring section 60 cm x 60 cm
Cavitation number adjustable in a wide range down to below
Total length including stiffening girders, not including the length required for a propeller dynamometer and a wake rake 13.9m
Maximum velocity of the water in the measuring section 12m/s
Pressure regulation from relatively high vacuum to above atmospheric pressure measured at the pressure regulation container 1 bar Approx.
Total height from the floor at which the tunnel foundations are supported to the highest part of the cavitation tunnel, inclusive stiffening girders, not including some additional height for the separate pressure regulation container and not including the height required for setting in propeller * dynamometers or other test equipment 9.3m.
Upper beam an be adjusted in height. Foreseen of fast approach device of the base plate and electric end of stroke switches of the load plate to save the machine from wrong manipulations. CBR loading machine motorized 50 KN ASTM version 1,27 mm/min Load is applied through a screw jack driven by an electric motor at a constant penetration rate of 1,27 mm/min achieved by a built in gear box and assured also under load.
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Dual purpose lighting, 320mm.
The celestial globe is a model used for navigation, astronomy teaching and the popularization of astronomy auxiliary instrument, it expressed the apparent motion of celestial bodies, coordinate and solve some practical problems by astronomical people.
The celestial sphere is an imaginary sphere introduced into the position and motion of celestial bodies.
The position, star name, constellation, and symbols of several celestial coordinate systems are plotted on the sphere.
According to the selected celestial center is different, a station, and the heliocentric celestial celestial sphere, all celestial bodies on the earth are not the same distance from the observer.
Celestial Instrument Nine Planets
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Material: Polypropylene
Color: White
Disposable: Single-use
Closure Type: Zipper
Ankle Style: Open
Cuff Style: Open
Size: 2X-Large
Seam Type: Serged.
Material: Polypropylene
Color: Yellow
Disposable: Single-use
Sterility: Non-sterile
Gender: Unisex
Size: Universal
No. of Pockets: None
Product Type: General Purpose Gown
Cuff Style: Elastic
Autoclavable: Not Autoclavable.
Central air conditioning system training device can simulate real process of building central air conditioning system. The students can learn various skills of central air conditioning system design, load calculation, electrical design, piping design, energy management and cost estimates. The system includes the electrical control system and central air conditioning system. It can demonstrate summer refrigeration cycle and winter heating cycle process of the central air conditioning.
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Electrically or manually operated gates allow simulating the fresh air inlet and the presence of one user. Two heat exchangers are assembled inside the air distribution system which allow varying the cooling or heating capacities. The Central Climatization System simulates the indoor air treatment for buildings such as hospitals, schools, hotels.Two fans - one at the air inlet, one at the air outlet - generate an air flow passing in an air distribution system, which has theshape of an H. The unit is supplied with a manual that describes each component of the system, installation and utilization procedures. A chiller complete with a reverse cycle valve feeds the two exchangers with hot or cold water according to the selectedcycle.
Experiments:
Study of a chiller and its functioning as a heat pump
Study of air flow and air flow measurements.
Influence of fresh air inlet
Influence of the air flow
Summer air conditioning
Winter air conditioning.
Designed to understand the operating principles of a centrallocking system.
Complete with front and rear door lock assemblies andcontrol unit.
Locking, dead-locking and un-locking can be observed duringthe operation of the Central Locking System Trainer.
Self contained, fully operational Central Locking systemtrainer.
This training stand is especially developedfor practical use in the appropriate learning fields. The inputs and outputs of theinstalled components are displayed in digital printing on the front panels. In addition to the wiringaccording to the circuit diagram, the diagnosis and programming using workshoptester via OBD is also possible. A special film allows you to write on the panel with water-soluble pens. This ensures high practicality. For better identification of the CANconnections between the control units, laboratory cables are supplied with 4 mmsafety sockets in different color coding. The necessary connections betweenthe control unit and the components must be made according to the wiringdiagram by the trainees themselves.
Components:
Control unit
Steering control unit with switch unit
Light switch
Wiper Motor
Steering control unit with switch unit
Diagnostic Interface
Headlight range control adjustment manually
Rear lights including fog light and reversinglights
Brake Light
Brake Light Switch
H7 Headlights
Fog lamps with associated control unit
Static Cornering Light
Complete Trailer Lighting on the back side
Hazard warning switch and interior light withdoor contact switch.
Equipment:
Immediately use able and wheeled functional model
Regulated power supply
All necessary connecting cables
Lockable Failure Box on the back side
OBD diagnostic interface
On the front panel marker pens can be used.
Learning objectives:
Testing and maintenance of electrical andelectronic circuits
Selecting and using electrical test andmeasurement equipment
Naming of electrical and electroniccomponents, assemblies and systems
Measuring and assessing electrical parametersand signals.
Electric boiler
2 circulating pumps, 1 domestic water pump
4 different radiators and additional plate heat exchanger as domestic water consumer
Function and operating behaviour of a modern heating system with digital heating controller
Measurement of temperature, pressure and flow rate
4-way mixing valve and 3-way mixing valve
Coloured pipes indicate feed and return flow.
It can fully display the composition and work process of the car alarm and central locking system. The teaching board contains car alarm and central locking system.
Features:
The panel is an aluminum panel. The color schematics is very convenient for students to analyses and to understand the work process.
It has the faults setting function: After setting the fault, the students can use apparatus to find the fault and do the fault troubleshooting exercises.
It is based on the real anti-theft device and central locking. The working principle and process of the anti-theft device and the central locking system can be demonstrated.
The electrical signals can be measured, such as resistance, voltage, current, frequency, etc of the electrical components.
Structure and composition:
Original car central locking ECU, glass lifting computer, glass lifter, four-door locks machine, tail cover lock, door lock switch, relay, data cable, high-capacity battery or 12V switch power, failure settings and troubleshooting system, color circuit schematics panel handling by computer, control panel, mobile stand.
The Central Lubrication Training recreates the real world environment with high-quality industrial central lubrication components operating in realistic applications with fault insertion capability in both the electrical and fluid components. Terminal strip test points are available at key locations to aid students in their troubleshooting process without damage to the equipment. Faults can be manually inserted throughout the system to provide students with real-world machinery lubrication troubleshooting experience. The Central Lubrication Training Central Lubrication Learning System teaches students the technical skills needed to operate, install, tune, maintain and troubleshoot these vital lubrication systems. The Central Lubrication Training includes a mobile workstation, pneumatic pump panel, series-progressive valve panel, fluid recovery panel, servicing package with hand pump, control center with micro-processor controller, student learning materials for both theory and lab, and teachers guide. Additional panels are available to extend the capability of the system. Central lubrication systems are used in almost every industry to provide preventative maintenance of central lubrication systems, by providing an automatic supply of lubrication to machine bearings and other devices needing lubrication. The mobile workstation consists of a sturdy welded-steel frame with interchangeable panels to permit other central lubrication systems to be operated on the workstation. These include: electric motor-driven pump, piston distributor valves, spindle lubrication, dual-line, and zoned.
Features:
Fault Insertion in fluid and electrical devices
Mobile Workstation
Interchangeable Component Panels
Heavy Duty Industrial Style Components
Steel Tubing Conductors
Student Reference Guide
Optional Online eBooks.
Trainer with buffer storage and bivalent storage for experiments with the modular system
Pressure relief and bleed valves for safe operation
Circulation pump with differential pressure or speed control
Heat transfer pipes with quick-release coupling and shut-off valve
Flow meters and temperature sensors for determining the heat flows
Freely programmable universal controller with data logger and PC connection via LAN
Driven 3-way valves
Two pressure sensors for system monitoring
Temperature sensors for heat storage and room temperature.
Center of gravity of a freely suspended two-dimensional object always lies along the line drawn vertically downward from its point of suspension. A simple and economical apparatus for demonstration of geometrical center of gravity of two-dimensional objects. Each lamina has suspension holes along their periphery. The point of intersection of lines drawn from point of suspension of 2 or more holes of a lamina gives center of gravity of that 2-dimensional lamina. Comprises a clear perspex rod mounted on a base with a suspension screw at the top and four laminas of clear acrylic 1 each of circular, triangular, square and trapezoidal.
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Centre Of Percussion includes a metal pendulum to provide the percussion force and a wooden pendulum to absorb the impact. The wooden pendulum forms a suspended mass, similar to a bat held underhand. Centre Of Percussion fits to the sturdy Test Frame for study or demonstration. It is the impact position which allows no reaction in the hand of the user, which would otherwise create uncomfortable shocks in their arm and wrist. A centre of percussion may also be termed the sweet spot of the impact of a ball against a bat or racquet.
This product is part of a range that explores free vibrations in simple one degree of freedom systems. It introduces students to key scientific terms such as:
Centre of gravity
Centre of percussion and the sweet spot
Simple harmonic motion and period of oscillation
Impact reactions
Radius of gyration.
Experiments:
Demonstration of centre of percussion of a compound pendulum
Centre of gravity, period of oscillation and radius of gyration of a compound pendulum
The equipment consists ofa vertical panel that holds a clear plastic quadrant, to which students addwater. The quadrant has engraved lines to help students keep the plane in avertical or angled position. The cylindrical sides of the quadrant have theircentral axis coincidental with the moment measurement axis. This product allows students to measure the moment due tothe fluid (hydrostatic) thrust on a fully or partially submerged plane. The plane works in either a vertical or inclined (angled) position. Students thencompare their measurements with theoretical analysis. The total fluid pressures on these curved surfaces therefore exert no moment about this pivot.Therefore, the moment is only due to the fluid pressure on the plane testsurface. Students measure this moment using weights suspended from a level arm. A scale on the panel of the apparatus shows the head of water. They then initially balance the quadrant tank using one of the weighthangers and the smaller trimming tank. They take results by balancingincremental weights on the hanger with known quantities of water. To performexperiments, students level the apparatus using its levelling feet and spirit(bubble) level. They decide whether to test either a vertical or inclinedplane. Students note the relationship between the moment and the water height(h). They then usethe results to calculate the equivalent moment of force (M) or hydrostaticthrust.
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