Technolab Associates

Madh, Mumbai, Maharashtra

This is a strain gauge based Drill Tool Dynamometer designed to measure Thrust & Torque during drilling operation and effect of speed, feed cut on these forces. The unit consists a mechanical sensing unit or tool holder and digital force indicator. The job can be mounted on a workplace holder on mechanical sensing unit. The unit is useful for drilling up to 25 mm dia.

Specifications -

• Mechanical Sensing Unit with Job Holder with strain Gauges mounted on it.
• Digital Force Indicator - two channel, to read both thrust and torque simultaneously.
• Balancing Potentiometer for initial balancing
• Range - thrust - 0 to 200 Kg, torque - 0 to 20 Kg m, least count - 1 Kg.
• The set up is calibrated at our works with the help of standard Proving Ring.

This set up has been designed to perform and verify the principles involved in study of vibrations. It consists of a basic frame and various components and sub assemblies designed for quick changeover and easy assembly of number of experiments in vibrations. A speed controller unit is provided for forced vibration experiments.

With this unit following experiments can be conducted

Pendulum Experiments For Pendulum a sub frame is attached to upper beam. Two Chucks and Hardened V guide is provided for carrying experiments.

Experiment - 1 - Simple Pendulum
To verify the relationand plot graph T Vs. L
Experiment - 2 - Compound Pendulumi) To verify the relation
ii) To determine the radius of gyration and equivalent length of compound pendulum.
Experiment - 3 - Bi-filler Suspension( Tortional Oscillations) To determine the radius of gyration of body about the center of gravity by using relation

Longitudanal Vibration - Experiment -4To verify the relation -
and plot graph T Vs. W
Experiment - 5 Equivalent spring mass systemStudy of un damped natural vibrations of beam pivoted at one end supported by tension spring at the other end.
Experiment - 6 Equivalent spring mass systemStudy of undamped natural vibration of beam pivoted at one end supported by tension spring at the other end to plot a graph of amplitude verses frequency.
Torsional Vibrations - Experiment - 7 - Single RotorTo verify the relation -
and study the relationship between the periodic time and shaft length.
Experiment - 8 - Two RotorTo verify the relation -

Experiment - 9 Single Rotor with viscous damping -To find out the damping coefficient Ct for various depths of damping drum (Immersed in oil) and to plot a graph of damping torque Vs. depth of damping drum.Experiment - 10 - Dunkerley`s RuleTo find out the natural frequency of a beam with and without load and to verify the Dunkerley`s RuleExperiment - 11 - Forced VibrationsTo study the forced vibrations for various amount of damping and to plot a graph of amplitude verses frequency. Following accessories will be supplied along with unit. - Exciter unit with FHP motor and controller. Ordinary strip chart recorder. Damper with an arrangement for changing damping.

This set up is designed to study coriollis component of Acceleration of a slider crank Mechanism. The apparatus uses hydraulic analogy to represent the rotating slider. It consists of a rotating block with two arms in opposite direction.

These tubes can be rotated at various speeds by variable speed motor. A Perspex window on top cover helps to visulise the process. Rotameter is used to measure water flow rate through tubes. Water is circulated by small mono block pump.

Specifications -

• Main Tank with fibre glass lining.
• Rotating Arms 9/6 mm dia, 250 mm long.
• Motor - Variable Speed D.C.Motor
• Rotameter
• Mono block Pump
• Control Panel comprising of - Speed Control Unit. Speed Indicator. Voltmeter Ammeter Necessary switches.
• Rigid support frame.

Range of Experiment -Coriollis Component of Acceleration can be determined at various speeds of rotation and water flow rates.

Service Required-

• A.C, Single Phase .230 V. stabilised supply.

It is motorised unit consisting of SUN gear mounted on input shaft, two plane gears meshes with the annular gear. These planet gears are mounted on a common arm to which output shaft is fitted. Loading arrangement is provided for loading the system and to measure Holding Torque.

Specifications -

• A compact Epicyclic Gear Train coupled with D.C. Motor. 1 HP PMDC
• Rope brake arrangement to measure Output torque and Holding torque.
• Control Panel comprising of - Digital Ammeter and Voltmeter. RPM Indicator. Speed Controller

Experimentation - 1. To measure epicyclic gear ratio between input shaft & output shaft. 2. To measure epicyclic gear ratio between input shaft and holding drum. 3. To measure Input torque, Holding torque and Output torque. Service Required -

• 230 V.A.C. stabilised power supply.
• Floor Space - 1.5m X 2m approx.

Now a days gyroscope is a very important tool used for various controls in high technology vehicles. For minimizing rolling, yawing and pitching of ship or aircraft Gyroscope is used. Balloons use Gyroscope for controlling direction. Gyroscope has applications in spacecraft, space platforms. Thus study of Gyroscope is of high importance for any Engineering student.

Description -The Motorised Gyroscope consists of a disc rotor mounted on a horizontal shaft rotating in the ball bearings of one frame. The rotor shaft is coupled to a motor mounted on a trunion frame having bearings in a yoke frame which is free to rotate vertical axis. Thus the disc can be rotated about three perpendicular axis. Angular scale and pointer fitted to frame helps to measure precession rate.

Features -

• Demonstration of relationship between applied torque and precession rate along with direction of rotation.
• Gyroscopic couple easily varied by weights.
• Precisely balanced rotor.
• Useful to verify the relationship - T = I.p

Specifications -

• Disc Rotor - 30 Cm. dia., 10 mm thick approx.
• Drive - FHP, AC/DC Single Phase Motor.
• Dimmerstat to vary speed of motor.
• Weight Set.

Range of Experiment -1) Observation of Gyroscopic behavior. ( Two Laws of Stability )2) Experimental justification of the equation T = I.pFor calculating the Gyroscopic couple by observation and measurement of results for independent variations in applied couple T and precession p.

Service Required -

• 230 Volts, A.C.stabilized supply.
• Tachometer
• 1m X 1m space, at working height.

This is a strain Gauge Type two/three component Lathe Tool Dynamometer designed to measure vertical & horizontal/(radial force in case of three component) forces on tool while orthogonal cutting process. The unit consists a mechanical sensing unit or tool holder and digital force indicator. With this dynamometer, students can study the change in these forces due to change in speed, feed and depth of cut.

Specifications -

• Mechanical Sensing Unit with Tool Holder and Tool with strain Gauges mounted on it.
• Digital Force Indicator - two/three channel, to read both forces simultaneously.
• Balancing Potentiometer for initial balancing
• Range - 0 to 300 Kg, least count - 1 Kg.
• Tool Size 12 mm
• The set up is calibrated at our works with the help of standard Proving Ring.

This is simple and easy to understand set up designed to study behavior of cutting forces during Milling Operation. This is based on octagonal ring method, which consist two pairs of octagonal rings with strain gauges mounted on it. These rings are sandwiched between two plates. A machine vice is mounted on top plate to hold job to be machined. A three channel digital force indicator is provided to measure three forces simultaneously.

Specifications -

• Mechanical sensing unit with octagonal ring set and strain gauges.
• Digital force indicator - 3 channel to measure three forces simultaneously.
• Range - 0 to 500 Kg
• Resolution - 1 Kg
• Balancing pots for initial zero setting.
• Machine vice to hold job.
• The set up is calibrated at our works with the help of standard Proving Ring.

• A hydraulic flume of c/s 200x300 mm & 4000 mm length with transparent window on either sides of 1000 mm length.
• Sliding gates one at upstream and other at the downstream side.
• Screw jack for change of the slope of the flume.
• A Sump tank of sufficient capacity.-1250 x 1800x 500mm (1000 lit approx)
• Supply tank with waves damping arrangement.
• A 2 H.P. centrifugal monoblock pump.- laxmi make
• A Orificemeter with manometer to measure the discharge. Inlet/throat dimensions: 50/28 mm respectively.
• Trolley with point gauge for level measurement.
• Models supplied:A) Weirs- i) Sharp crested weir (crest length 200 mm)ii) Broad crested weiriii) ogee weir or spillway.iv) Venturi flume

This is an open circuit Wind Tunnel which provides a region of controlled airflow into which models can be inserted. The propulsion is provided by a fan at downstream of working section.

The tunnel consists of bell mouth shaped entry to guide the air smoothly into settling chamber consisting of honeycomb and nylon mesh screens which filters and stabilizes the air flow. This follows working section or test section where various models can be tested. Two windows with acrylic sheet one each on either side will be provided for visual observation. Working section is followed by diffuser section, which reduces the dynamic pressure at the exit.

A three -blade fan coupled with D.C variable speed motor is used to produce desired wind velocity. A thyristorised motor control is used for smooth variation of air velocity.

Wooden Models

• Aerofoil:a) Symmetricalb) Unsymmetrical. 150mm, width and 250mm.long with 15 piezometric tapping with 0-360 degree protractor.
• Cylindrical Model: 75mm, dia., 250mm long with piezometric tapping and 0-360 degree protractor.
• Spherical Model: - 100mm, dia.

Lift & Drag Indicator

• LiftDisplay: - 3 1/2Least count: - 0.1 kgRange : - 6 kg
• DragDisplay: - 3 1/2Least count: - 0.1 kgRange : - 6 kg

The unit consists of flow channel of proper length & width. The notch or weir is fitted; water supply is given at one end of channel. Water flow over notch or weir. Arrangement are made to measure the still level to determine the ead.

FEATURES

• Interchangeable Brass/Aluminium notches.
• Measurement of head by scale.

SPECIFICATION

• Flow Chanel 200 x 200 x 1200 mm made from crc sheet with powder coating
• Notches 60⁰included angle "V" notch - material brass
• Rectangular notch.- material - brass
• Notch interchanges arrangement.
• Sump Tank of size 900 X 400 x 400 mm with FRP lining to inside
• Discharge Measuring Tank - 300 X 400 X 300 mm with FRP lining to inside
• Pump - 0.5 HP , Kirloskar Make.

RANGE OF EXPERIMENTS

To determine coefficient of discharge through
• 60⁰"V" notch
• Rectangular notch.

SERVICE REQUIRED

• Water supply.
• Suitable floor space of 2 m. x 2 m.

The apparatus enables the students to study the interesting phenomenon of heat pipe & to compare its performance with other pipes. The apparatus consists of a heat pipe made up of stainless steel, evacuated and partially filled with distilled water, a copper pipe and stainless steel pipe of same sizes. The pipes are heated at one end and water tank is provided at other end of pipes to take over heat. Thermocouples are provided along the length of pipes so that nearly isothermal operation of heat pipe as compared with other conductors can be demonstrated. Rapid rise of water temperature in tank around heat pipe demonstrates super conductivity of heat pipe as compared to copper and stainless steel pipe.

Specifications

• Heat Pipe - Stainless steel pipe size 25 mm dia., 300 mm. long with both side closed, evacuated and filled with distilled water.
• Copper Pipe - 25 mm dia., 300 mm. long
• Stainless Steel pipe - 25 mm dia., 300 mm. long
• All pipes are positioned horizontal with one end heated by band heater and water tank at other side.
• Thermocouples are provided along the length to all pipes.

Instrumentation & Control

• Digital Voltmeter - 0 to 199.9 Volts.
• Digital Temperature Indicator.
• Heater Control

Service Required

• 230 V.A.C. stabilised supply with earthing
• Floor space - 3.5 m X 1 m at working height.

Shell & Tube Heat Exchangers are popular in chemical industries because they occupy less space and offer reasonable pressure drop. The apparatus consists of fabricated M.S. shell, inside which copper tubes with baffles are fitted. Hot water is obtained from a set of gysers provided with setup. This is two pass type exchanger so that hot water passes to one end of shell through tubes and returns to another end through remaining water. The cold water is admitted at the bottom of shell, which passes over hot water tubes. Control valves are provided to control the flow rates of hot water and cold water. Measuring tank is provided to measure flow rates. The unit is mounted on a sturdy stand.

Specifications

• Shell - Material - M.S. Inner Dia. - 208mm Thickness - 6mm Length - 500mm 25% baffles at 100m distance - 4No.
• Tubes - Material - Copper I.D. - 13mm, O.D. - 16mm approx. Length - 500mm No. of Tubes - 24
• Thermometers - 4 No. , 0 to 100⁰c
• Gysers - 3KW cap. - 2No.
• Measuring Tank

Experimentation

• Determination of heat transfer coefficient for inner and outer surface of tubes.
• Study of variation of heat transfer coefficient with type of flow.

Service Required

• Continuous water supply at rate of 50 lpm at constant head.
• Floor Space - 2m X 1m
• 15 Amp. , 230 V.A.C. power supply

Production of chilled water (12oC 6oC) for air-conditioning, industrial refrigeration, process cooling etc.Heat pumps for energy recovery in urban heating, hot water production and heating in industrial process.Uses of any thermal energy hot water, steam, superheated water, gas, oil, coal, recovered heat, etc with excellent efficiency.A clean, reliable process, which satisfies the pollution and safety standards and uses Lithium Bromide, a stable and non-toxic salt instead of CFCs or Ammonia.The materials are selected to ensure durability and compatibility with the types of fluids used and external conditions.