Theory of Machine Lab

Specification

• Disc rotor – 30 cm dia, 10 mm thick approx.
• Drive – AC/DC Single phase motor. Fractional HP 6000 RPM.
• Overall Size – 30 cm base diameter, 5 cm height
• Approximate weight – 30 kg.

Range of Experimentations

Observation of Gyroscope behavior (Two Laws of Stability)

Experimental justification of the equation T= I. W. Wp

Specification

• Drive Motor – F.H.P. Universal motor.
• Balancing Weights – 6 nos with different sized drills for varying the unbalance.
• Cord and container system with precision steel balls for relative weight measurement.

Range of Experimentations

• Static balancing of system using steel balls.
• Dynamic balancing of a simple rotating mass system.
• Obser vation of effect of unbalance in a rotating mass system.

Specification

• Drive unit- D.C. Motor 0.5 H.P., 0-1500, RPM 220 V. D.C.
• Speed Control Unit working on single phase.
• Belt and Pulley system to give spindle speed 100 to 500 RPM.
• Governor mechanisms with necessary springs and weights.

Range of Experimentations

For all types of Governor.

• Determination of characteristic curve of sleeve position against Speed of rotation.
• Derivation of the actual controlling force curves from the above Characteristic. Porter and pronell Governors. The effect of varying the mass of the centre sleeve.

Hartnell Governors. Effect of varying the spring

Specification

• Cams : Tangent, Eccentric, Circular Arc.
• Followers : Roller, Knife edge, Mashroom
• Drive : D.C.-0.25 HP 0-1500 RPM.
• Speed Control Unit : A Dimmer stat of 2 Amp capacities

Range of Experimentations

For the combination of cams and followers provided, the following tests can be conducted.

• Plotting the lift-angle of rotation curve. (Cam profile)
• To study the effect of follower weight(W) on the speed of bounces.
• To study the effect of initial spring compression on the speed of bounce.
• Follower bounces (jump) can be observed by using a stroboscope. (Stroboscope at Extra Cost)

Specification

• Oscillations of simple pendulum.
• Oscillations of compound pendulum.
• Radius of gyration of bi-filler suspension.
• Undamped torsional vibrations of single rotor system.
• Damped torsional vibrations of single rotor system.
• Torsional vibration of double rotor system
• Free vibrations of helical coiled spring.
• Free vibrations of spring mass system.
• Forced damped vibrations of spring mass system.
• Verification of Dunkerley's rule.
• Forced damped vibrations of simply supported beam at various amounts of damping.
• All the experiment units and accessories can be suitably fitted to a sturdy frame.

Range of Experimentations

• 300mm height Differential Manometer Measuring Tank: 300 x 300 x 500 mm Supply Tank :- 1050 x 300 x 400 mm
• Instruction Manual

Specification

• Shafts made from steel & of the following nominal dimensions.
• Dimensions in mm:-
  4.76mm or (3/16)”
  6.35mm or (1/4)”
• Length in mm:-
  900 or (36)
  900 or (36)
• Drive 'PROMPT' make single phase AC/DC fractional HP 6000 RPM.
• Dimmerstat for controlling of speed.

Range of Experimentations

• Display of the various modes of whirl for a range of shafts with –
• Both ends DIRECTIONALLY FREE
• One end FIXED and the other FREE.
• Modes of vibration can be studied & the frequency
• can be measured in each case.

Specification

• Journal Bearing- 70mm dia (Nominal) 75mm dia.
• Weights- 4 adjustable weights.
• Recommended oil- SAE 10
• Motor- D.C. shunt wound Speed 1500 RPM in both the directions
• Control Unit- Special design.
• Manometer Panel- 16 tubes mounted on a M.S. board.

Range of Experimentations

Simple Demonstrations : Observation of the pressure profile at the various conditions of load and speed.

Experimental Investigation : After noting the pressure profile for any chosen conditions the following analysis may be conducted.
a) Plotting the Cartesian and polar pressure curves.
b) Plotting the theoretical Summer field curves.

Specification

• 1HP D.C. Motor, 1500 RPM
• Voltmeter 0-300 V, Ammeter 0-5 Amp
• RPM indicator, Dimmer 4 Amp
• Spring Balance 0-10 Kg.

Range of Experiments:

• To measure epicyclic gear ratio between input shaft and output shaft (Actual and Theoretical).
• To measure input torque, holding torque and output torque.

Specification

• Main Tank : Fabricated out of fiber glass plastic sheet.
• Rotating Arms : 9mm/6mm orifice dia, 300 mm long.
• Rotameter OR Watermeter 250 to 2500 LPH Coupled to D.C. Motor 0.5 H.P. 1500 RPM
• Voltmeter 0-300 V, Ammeter 0-5 Amp
• RPM indicator, Dimmer 4 Amp
• Mono block Pump : Single phase, pump with Motor 2400 LPH discharge.
• Control : Consisting of pump switch, Variac Speed Control, Speed Indicator Main Switch.

Range of Experimentation

• Coriolli’s Component of Acceleration can be determined at various speeds of rotation and water flow rates.

Specification

• DISC - Case hardened steel disc, dia. 200 mm, max speed 1500 RPM. Max. surface speed
• 26.5 m/s.
• Driver motor - 0.5 HP, 1500RPM, coupled to single phase Induction motor with 3 speed
• V- belt pulley.
• Dimmer 2 Amp, RPM Indicator
• Pins - Dia. 12 mm + 0.000 / -
• 0.005 mm, Aluminium and Cast Iron – 1 No. each, with pin guide.
• Lubricant tank with pipe for lubricated testing.
• Spring balance 10 kg.
• Analogue displacement measurement unit for measurement of wear of pin, range - 0-10 mm.
• A splash arrester and protective cover is provided around the disc.

Specification

• Flywheel – 200mm x 35mm thick.
• Pulley and weight set for applying the torque weight set 200gm, 500 gm, 1 kg
• Recorder – Paper roll with reciprocating pen.
• Small Motor to mounting bucket with ball bearings.
• Flywheel mounting bracket with ball bearings.

Specification

• 0.5 HP D.C. Motor, 1500 RPM
• Voltmeter 0-300 V, Ammeter 0-5 Amp
• RPM indicator, Sensor 2 nos., Dimmer 2 Amp
• Spring Balance 0-10 Kg.
• Flywheel - 200 mm x 35 mm thick.
• Pulley and weight set for applying the torque weight set 200 gm, 500 gm, 1 kg
• Recorder – Paper roll with reciprocating pen.
• Small Motor to mounting bucket with ball bearings.
• Flywheel mounting bracket with ball bearings.

Specification

• Bearing Mounting Fixture – Consist of a set of bearing races for bearings from 6201 to 6204 with parallelogram loading attachment.
• Drive motor – ½ HP, 1500 RPM
• D.C. motor.
• Lever and spring balance for applying the load, maximum loading capacity 25Kg.
• Dimmer Stat 2 Amp
• Electronic revolution counters with digital indicator.
• Torque arm with dead weights for measurement of friction torque fixture for measuring bearing radial clearance.

Range of Experimentation

• To study the impact of jet on various types of vanes & to measure impact forces.

Specification

This board illustrates the process of cutting of Involutes Gear Teeth, by use of rack type cutter. It consists of three transparent discs A, B, C having pitch circle diameters 192, 225, 306 mm respectively. A Gear tooth profile with module 18 mm can be traced out on piece of paper placed between disc & cutter. An effect of interference & undercutting on correct profile of gear tooth can be studied from the profiles traced.

Specification

• Precision ground plunger to develop the required pressure.
• Weight set for the pressure of 0.5 Kg/cm2 to 50 Kg/cm2. In steps of 0.5 Kg/cm2 for 50 Kg/cm2 and
• 0.5 Kg/cm2 to 20 Kg/cm2 for 20 Kg/cm2.
• Adapters for gauges -
• 1/4” BSP. X 3/8” BSP. Threading - 1 No.
• 1/4” BSP. X 1/2” BSP. Threading - 1 No.
• A technical manual will be supplied with the unit.

Specification

• Bourdon's Pressure Gauge. Capacity - 1 to 10 bar, least count - 0.5 bar (kg/cm2)
• System of which pressure has to be measured
• Air cylinder
• Slandered Bourdon gauge with comparative gauge.
• Foot pump based actuator setup.
• Analog dial gauge.