Theory of Machines

• The main part has a variable speed motor that turns a belt drive. 
• The belt drive turns a precision bearing shaft. 
• A Motor Drive Module allows the user to vary the bearing speed.
• The bush has pressure tappings equally spaced around its circumference. 
• The tappings connect to a multichannel digital pressure display unit. 
• A speed sensor and the bearing bush load cell connect to the Motor Drive Module. 
• This module displays the bearing speed and the load measured at the load cell.
• The shaft has a high-quality surface finish and spins inside a vertically loaded bush. 
• A hand-operated load control and load cell allow the user to apply and measure the load on the bearing bush. 
• Both the Motor Drive Module and the Pressure Display Module fit into an Instrument Frame that has extra space for the optional frame-mounted VDAS-F. 

Contact Science Lab for your Educational School Science Lab Equipments. We are best engineering educational equipments, high school science lab equipment manufacturers, lab equipment exporters, lab equipments manufactruers, lab instruments manufactruers, mathematics lab equipments manufacturers.

• A base unit contains a variable-speed motor. 
• The Hartnell governor raises the sleeve against a compression spring. 
• A sensor measures the position (lift) of each governor sleeve as it rises. 
• The motor turns each of three different governors: Proell, Porter and Hartnell.
• Each governor uses rotating weights (masses) and levers to raise a ‘sleeve’. 
• The Porter and Proell governors raise the sleeve against the action of gravity. 
• Users may also adjust the arm length and rotating mass of the Hartnell governor. 
• The clear dome includes an interlock that shuts off power to the motor. 
• Additional weights (supplied) allow the user to vary the mass of the sleeve of the Porter and Proell governors. 
• This allows students to see the governors and use them in safety while still giving them access to examine or adjust them. 

Contact Science Lab for your Educational School Science Lab Equipments. We are best maths lab equipment manufacturers in india, physics lab equipments manufacturers, school educational equipments, school lab equipment manufacturer, school lab equipments manufacturers in india, scientific educational lab equipment.

• This floor-standing apparatus allows students to study the performance of a journal bearing during different test conditions.
• Students load the bearing by attaching weights to arms connected to the bearing.
• Display shows the motor speed. 
• A control unit adjusts the motor speed, which can run in both directions.
• The clearance is especially large to clearly show the oil in the bearing. 
• Supplied with the equipment is a container of suitable oil. 
• An adjustable reservoir supplies oil to a low pressure region at both ends of the bearing.
• It is a plain steel shaft encased in a clear acrylic shell and directly driven by an electric motor. 
• The bearing is freely supported on the motor shaft and sealed with a rubber diaphragm. 
• The bearing contains 12 equi-spaced pressure tappings around its circumference and four additional ones along its topside and on a vertical radial plane. 
• All are connected by light and flexible plastic tubes to the rear manometer panel, to clearly show the pressure head of oil at all 16 points at all times.

Contact Science Lab for your Educational School Science Lab Equipments. We are best scientific lab equipments manufacturers, scientific laboratory equipments manufacturer, technical educational equipment manufacturer, technical lab equipments manufacturers, tvet lab equipment manufacturers, vocational training lab equipments exporter.

• This simple piston disc and cylinder form a dashpot damper that fits to the Test Frame under the beam. 
• It works with easily found non-toxic fluids (not supplied) for different damping levels. 
• Students may try their own fluids and their own piston discs for project work.

Contact Science Lab for your Educational School Science Lab Equipments. We are best scientific lab equipments manufacturers, scientific laboratory equipments manufacturer, technical educational equipment manufacturer, technical lab equipments manufacturers, tvet lab equipment manufacturers, vocational training lab equipments exporter.

• This product is part of a range that explores free vibrations in simple ‘one degree of freedom’ systems. 
• This common system appears in machines and vehicle suspensions.
• A back panel fixes to the Test Frame. 
• The panel holds a pivot and a non-contacting displacement sensor. 
• This product includes a beam pivoted at one end, with the other end suspended by a coiled spring. 
• The pivot contains high-quality self-aligning bearings that hold the left-hand end of a rigid beam, while allowing it freedom to rotate through a small angle. 
• The sensor measures the oscillations at the right-hand end of the beam with negligible damping, while working to guide the movement. 

Students to key scientific terms such as:

• Moment of inertia, Oscillation damping.
• Spring constant and Hooke’s Law.
• Simple harmonic motion and frequency of oscillation.
• Phase difference between displacement and its derivatives.
• This product fits to the sturdy Test Frame for study or demonstration. 

Contact Science Lab for your Educational School Science Lab Equipments. We are best educational equipment manufacturers india, educational equipments, educational equipments exporter, educational equipments exporters, educational equipments for science labs, educational lab equipment export.

• This product is part of a range that explores free vibrations in simple ‘one degree of freedom’ systems. 
• A beam with the mass at the end works in a similar way to a mass spring system - the stiffness of the beam simply replaces the stiffness of the spring. 
• The vibrating cantilever examines what happens if the spring element is not light. 
• A back panel fixes to the Test Frame. 
• Panel holds a sturdy clamp and two runners. Clamp holds the beam. 
• Students use the clamp to adjust the oscillating length of the cantilever. 
• The runners hold a non-contacting sensor that measures the oscillations at the end of the cantilever. 
• The sensor has no physical contact with the beam, for negligible damping.
• The vibrating cantilever forms a simple and highly visual example of oscillations that may occur in real structures such as aircraft wings. 

Such as:

• Simple harmonic motion (SHM) and frequency of oscillation.
• Beam stiffness, Rayleigh’s method, Dunkerley’s method, Second moment of area.
• Phase difference between displacement and its derivatives.  

Contact Science Lab for your Educational School Science Lab Equipments. We are best educational lab equipment exporter, educational lab equipment manufacturer, educational lab equipment manufacturers in india, educational lab equipment supplier, educational lab equipments, educational lab equipments export.

• This simple piston disc and cylinder form a dash-pot damper that fits to the guide rods under the platform. 
• It works with easily found non-toxic fluids for different damping levels. 
• Students may try their own fluids and their own piston discs for project work. 
• When using the Damper Kit, VDAS can fit its displayed data to underdamped and overdamped viscous damping models. 

Contact Science Lab for your Educational School Science Lab Equipments. We are best educational lab equipments exporter, educational lab equipments manufacturers, educational lab equipments supplier, educational lab equipments suppliers, educational lab export, educational lab exporter.

• For use with Free Vibrations Experiments, the Test Frame fits on any standard desk or bench top. 
• Students, teachers or lecturers fit the parts of their free vibrations experiments to the Test Frame to study or demonstrate a free vibrations topic. 
• The Test Frame has two extruded alloy horizontal members each with slotted fixing points to all four sides. 
• The two triangular sides each have adjustable levelling feet. 
• A stable, level Test Frame is essential in vibration experiments to give repeatable and accurate results. 
• Include a storage tray and lid with the Test Frame.
• The sturdy construction is necessary for accurate results in vibration experiments, but this also gives the frame a long service life. 
• The Test Frame also includes a hexagon tool and a spirit level for easy assembly and levelling.
• Despite its sturdy construction, the frame is light enough for two people to move it around the classroom easily.
• This is useful to store tools and smaller parts of your optional experiments, helping prevent accidental loss or damage.

Contact Science Lab for your Educational School Science Lab Equipments. We are best mathematics lab equipments suppliers, mathematics lab kit, mathematics lab kits india, maths kits ,maths lab equipment manufacturers in india, maths lab equipment suppliers.
 

• The Hertzian Contact Apparatus is a self-contained and easy-to-use unit that shows the nature of contact between two surfaces. 
• It compares experiment results with predictions based on Hertz’s original theories. 
• A hand-operated hydraulic pump and cylinder force the two pads together. 
• Students may rotate the lower pad, a pointer shows the angle of rotation. 
• This allows a study of the effect of different relative curvatures. 
• The apparatus has two pads with curved contact surfaces. The upper pad has a compound radii. 
• The contact zone may be circular or elliptical, depending on the relative angular position of the two pads. 
• Supplied is a transparent scale to measure the contact shape and angle. 
• Locknuts on the threads of the pump work to limit the maximum pressure, preventing damage to the equipment.

Contact Science Lab for your Educational School Science Lab Equipments. We are best educational laboratory instrument suppliers, educational laboratory instruments exporters, educational laboratory microscopes, educational laboratory suppliers, educational physics lab equipments, educational science equipments.

• The main part of the product has a precision machined heavy steel base which holds a high-torque direct-drive variable-speed motor.
• The follower fits to the bottom of a vertical shaft running in low-friction linear bearings. 
• Include a tool for easy changeover of a choice of two followers.  
• The motor shaft connects through a coupling to the main shaft which then passes into the cam test area. 
• Self-aligning heavy-duty bearings support the shaft which has a substantial flywheel. 
• The flywheel reduces speed variations as the torque demand changes during the cam rotation cycle. 
• Students may also fit one of a choice of two compression springs and adjust their preload. 
• These add to the mass of the follower and vertical shaft pushing the follower onto the cam face. 
• Students may also add different masses to alter the mass of the follower and thus the force applied to the cam. 
• The selection of springs, followers and cams allow for a wide range of investigations.
• The cam under test fits to the end of the main shaft, accurately mounted both axially and radially to ensure repeatability.

Contact Science Lab for your Educational School Science Lab Equipments. We are best educational scienitific lab equipments, educational scientific labs equipments, engineering educational equipments, engineering educational equipments in india, engineering educational lab equipments, engineering equipments suppliers.

• A separate ‘Acceleration and Static Test Stand’ gives extra experiments in measuring angular acceleration and static efficiency. 
• The test stand includes sets of weights to apply turning forces to the shaft of a flywheel.
• A sensor and a multiline display automatically calculate angular acceleration. Students use this to find inertia by experiment. 
• The test stand also allows simple static efficiency tests on the gear drive for comparison with those from dynamic tests on the base unit. 
• A slot to the front of the test stand holds a tray to store your weights and other loose items.
• The flywheel forms a simplified version of one of the gears in the gear drive, to provide a starting point in understanding inertia calculations of more complex gear drives. 

Contact Science Lab for your Educational School Science Lab Equipments. We are best geography lab equipments manufacturers, geography lab equipments suppliers, geography lab models suppliers, high school biology lab equipment india, high school biology lab equipment manufacturers, high school chemistry lab equipment manufacturers.

• A bench-mounting base unit forms the main part of this set of products. 
• The dynamic tests run the input of the different drive units at a given speed using a motor, while measuring the input power. 
• Dynamometer loads the output of the drive unit while measuring the output power. 
• A variable-speed, low-voltage motor provides the shaft input turning force (effort) to the drive. 
• A dynamometer provides the output braking force (load) to the drive. 
• The dynamometer uses electromagnetic braking and a hysteresis effect to provide a variable load at a constant torque irrespective of the speed. 
• Sensors on the motor and dynamometer measure their shaft speed, torque and therefore power in and out at the drive. 
• Flexible couplings with collets connect the drive unit to the motor and dynamometer for quick and accurate alignment. 
• Students use the measurements to find the performance and efficiency of the drive unit.
• Axial trunnions with race bearings hold the motor and the dynamometer for free rotation against their load cell sensors to measure torque accurately.  
• Supplied with a three-shaft gear drive unit as standard, the base unit dynamically tests the gear drive and the other optional drive units. 

Contact Science Lab for your Educational School Science Lab Equipments. We are best high school maths lab kit manufacturers, high school physics lab equipment, high school science kits exporters, high school science lab equipment, high school science lab equipment manufacturers, high, school science lab equipments suppliers.
 

• This gives a simple and quick system set up and changeover time.
• This gives minimal cyclical variation due to inertial load variations.
• A non-contacting sensor measures beam displacement. 
• Students may vibrate the systems manually. 
• The servomotor has its own encoder and advanced controller for accurate speed regulation. 
• The sensor has no physical contact with the oscillating system, for negligable damping. 
• This ensures repeatable results over a range of ambient temperatures. 
• An encoder linked to the rotating exciter mass measures its dynamic position.
• They may also force the vibrations using a high-quality variable speed servomotor driving a rotating offset mass - forming an ‘exciter’.  
• The beam is of high-grade ground steel, and the pivots use high-quality ball races for lowest friction and incidental damping. 
• An accelerometer built into the exciter assembly works to show the phase relationship between beam displacement and acceleration. 
• It also helps to compare measured acceleration with that derived from the displacement using the software. 
• The unit includes a variable-area viscous dashpot damper, for use with a non-toxic fluid (supplied) of stable viscosity. 

Contact Science Lab for your Educational School Science Lab Equipments. We are best indian biology lab equipments, lab equipment exporters, lab equipments exporter, lab equipments manufacturers, lab instruments manufacturers, laboratory equipment dealer.

• A bench mounted, self contained apparatus to demonstrate the pressure distribution across the film of oil in a Michell tilting pad slider bearing. 
• The bench-mounting unit has an aluminium plate (pad) mounted above a continuous loop flat belt. 
• This creates a pressurised film of oil between the pad and the belt. 
• A set of thirteen graduated tubes show the oil pressure across and along the film under the pad. 
• Micrometers measure the leading and trailing edge positions of the pad.
• Two eccentric shafts hold the pad so students can adjust the angle of tilt of the pad. 
• This helps students to find the relationship between pressure distribution and film thickness. 
• Included is a variable speed control to control the speed of the motor that turns the belt.  
• Included with the apparatus is a container of oil and a viscometer to measure the viscosity of the oil.
• Students vary the belt speed to find the relationship between sliding speed, oil viscosity and pressure distribution.

Contact Science Lab for your Educational School Science Lab Equipments. We are best laboratory equipments suppliers, laboratory glass equipments, math lab kits, mathematics lab equipment manufacturers, mathematics lab equipments, mathematics lab equipments manufacturers.

• A benchtop base unit supporting a rotating arm on which a transparent water tank and counterbalance are mounted.
• The jet of water is observed to deflect when the arm rotates.
• The water tank houses a submersible pump which produces a jet of water. 
• Dials and a digital display on the base unit allow students to adjust the speed and direction of rotation, as well as the pump rate.
• The deflection is due to the Coriolis force, a fictitious force which appears to act on objects moving within a frame of reference that is rotating.

Contact Science Lab for your Educational School Science Lab Equipments. We are best mathematics lab equipments suppliers, mathematics lab kit, mathematics lab kits india, maths kits ,maths lab equipment manufacturers in india, maths lab equipment suppliers