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Theory of Machine Labs

 
 
 
CAM ANYALISIS APPARATUS

DESCRIPTION
The ‘J P T I’ consists of a cam profile and study of cam follower system. The instrument consists of cam mounted shaft supported by ball bearing upon which three different type of cam can be mounted. The push rod for follower is supported vertically which can adopt three different type of followers can be changed easily. Motor rotates the cam and dial gauge is provided for plotting of follower displacement W.R.T. cam position. Cam jump speed can be found by operating different speed and effect of speed and spring force on jump speed can also be studied.

SPECIFICATION
• Cam- Eccentric, Tangent, Circular.
• Follower-Knife edge, Roller type & Mushroom type.
• Variable speed motor coupled to cam shaft of suitable range and various speeds.
• A dial gauge.

RANGE OF EXPERIMENTS
• Plotting and analysis of the X - 0 curve.
• The velocities and accelerations of the follower may be derived and hence inertia
   forces plotted over the whole lift period. The condition of follower bounce can
   clearly be shown by carrying out theoretical calculations & graph from X-0 curve
• Test can be repeated by changing parameters like various compression springs,
• Follower weights and cam speed.
• To study the effect of follower weights (W) on the speed of bounce.
• To study the effect of initial spring compression (S) on the speed of bounce.

SERVICE REQUIRED
1) Single Phase 15 amps. Electric connection.
2) Bench area of 0.5 m x 1 m at working.

J. P. TECHNO INSTRUMENTS
 
Cam Anyalisis Apparatus
 
Cam Anyalisis Apparatus
 
J. P. TECHNO INSTRUMENTS
953, Bazar Peth Road, Masur
Tal-Karad, Dist - Satara. (Mh)
Cell : + 91 - 98220 48448
Web : www.jptechnoindia.com
 
 
 
 
 
 
EPICYCLIC GEAR TRAIN AND HOLDING TORQUE APPARATUS

DESCRIPTION:-
The ‘J P T I’ unit consists of an epicyclic gear train. Gear train consist of an internal gear having 56 teeth two planet gears with 21 teeth each and sun gear having 14 teeth. The train is driven by a 3-ph/1-ph, 1440 R.P.M. motor giving maximum input torque of 0.5 kg/m. The planet carrier carries the planet gears. The internal gear is mounted over a flange which rotates in bearings. A pulley is mounted over a output shaft of internal gear. Torque measurement arrangement with spring balance is provided for both the internal gear and planet carrier, so that either or then can be held stationary and holding torque required for stationary member and output torque for the other member can be measured. The whole unit is mounted over a sturdy frame. Motor current is calibrated for output torque of the motor. A three channel R.P.M. indicator (digital) can be supplied with the unit at an extra cost which enables to determine the angular velocities of all the members. A digital torque indicator for motor output torque can be supplied at an extra cost, instead of motor current calibration.

SERVICE REQUIRED:-
• Single Phase 15amp Electrical Connection.
• Floor space of about 1.5m. X 2m.

J. P. TECHNO INSTRUMENTS
 
Epicyclic Gear Train And Holding Torque Apparatus
 
Epicyclic Gear Train And Holding Torque Apparatus
 
J. P. TECHNO INSTRUMENTS
953, Bazar Peth Road, Masur
Tal-Karad, Dist - Satara. (Mh)
Cell : + 91 - 98220 48448
Web : www.jptechnoindia.com
 
 
 
 
 
 
JOURNAL BEARING APPARATUS

DESCRIPTION
The ‘JPTI’ unit consists of a plain steel shaft encased in bearing & directly driven by a small electric motor. The bearing is freely supported on the shaft & sealed at the motor end. The motor speed is precisely controlled and adjusted by specially designed control unit and can be run in both the direction. The bearing contains twelve equispaced pressure tapings around its circumference and four additional once along its top side and on a vertical radial plane. All are connected by light and flexible plastic tubes to the rare manometer panel, so that pressure head of oil at all sixteen points can be clearly observed at all times. Oil is supplied to a low pressure region at both ends of the bearing by an adjustable reservoir fitted at the side of the rare panel. The bearing can be loaded by attaching various weights to the arms supported beneath it. A table is conveniently provided at the front of the apparatus.

SPECIFICATIONS
1) Journal Dia. - 50 mm. Dia.
2) Bearing Dia. - 55 mm. Dia.
3) Weights - 4 adjustable weights.
4) Recommended oil - SAE 10
5) Motor - D.C. shunt wound, speed range 500- 3000 rev. /min. in both the directions.
6) Control Unit - Special Design.
7) Manometer Panel - 16 tubes mounted on wooden Background

FEATURES
• Pressure profiles along and around the bearing continuously monitored on
  large manometer panel.
• Theoretical pressure profiles can be carried out & compared with practical result.
• Wide range of speeds & loads possible.
• Ideal for group studies & demonstrations.
• A.C. single phase F.H.P. motor is used with a speed control unit.
• Manometer height of 2-3 m. provided to study bearing pressure variation at higher speeds.

RANGE OF EXPERIMENTS
• Simple Demonstrations:-
  Observation of the pressure profile at the various conditions of load & speed.
• Experimental investigations:-
   After noting the pressure profile for any chosen condition, the theoretical Summer field
  curves may be plotted.

SERVICE REQUIRED
• Single Phase 15amp Electrical Connection.

J. P. TECHNO INSTRUMENTS
 
Journal Bearing Apparatus
 
Journal Bearing Apparatus
 
J. P. TECHNO INSTRUMENTS
953, Bazar Peth Road, Masur
Tal-Karad, Dist - Satara. (Mh)
Cell : + 91 - 98220 48448
Web : www.jptechnoindia.com
 
 
 
 
 
 
MOTORISED GYROSCOPE

DESCRIPTION
The ‘JPTI’ unit’s of a motorized gyroscope consist of a disc rotor mounted on a horizontal shaft rotating in the ball bearing of one frame. The rotor shaft is coupled to a motor mounted on a turning frame having bearings in the yoke frame which is free to rotate about vertical axis. Thus a disc can be rotated about three perpendicular axes. Angular scale and a pointer fitted to frame help to measure precision rate.

FEATURES
• Demonstrates relationship between applied torque and the rate and direction of
   rotation and precision.
• Gyroscopic couple easily varied by an assortment of weights.
• Precisely balanced rotor.
• Completely portable and suitable for classroom demonstration.
• Useful to verify the relationship T=IwwP.

RANGE OF EXPERIMENTS
• Observation of gyroscopic behaviour (two laws and stability).
• Experimental justification of the equation T=IwwP for calculating the gyroscopic
  couple by observation and measurement of results for independent variations in
  applied couple (T) and precision (WP).

SPECIFICATION
• Disc rotor - 30cm dia.10m.m. thick.
• Drive - A.C. /D.C. single phase motor.
• Overall size - 30 cm dia. Base, 50 cm. height.
• Weight - 30 Kg approx.

SERVICE REQUIRED
• Single Phase 15 amp Electric Connection.
• Tachometer for speed measurement.
• Suitable bench area to mount the instrument.

J. P. TECHNO INSTRUMENTS
 
Motorised Gyroscope
 
Motorised Gyroscope
 
J. P. TECHNO INSTRUMENTS
953, Bazar Peth Road, Masur
Tal-Karad, Dist - Satara. (Mh)
Cell : + 91 - 98220 48448
Web : www.jptechnoindia.com
 
 
 
 
 
 
SLIP AND CREEP MEASUREMENT APPARATUS IN BELT DRIVE

DESCRIPTION
The apparatus consists of a variable speed D.C. Motor. Driving Pulley and Driven Pulley of equal diameters. The pulleys are mounted on input shaft (motor shaft) and output shaft. The Driven pulley can slide on the base only with bearing block to change the initial tension in belt. Brake Drum is mounted on the output shaft, which helps to measure power output. The motor speed is varied by Dimmerstat. Driving and Driven pulley speeds are indicated by a two channel digital Speed Indicator. With the help of Stroboscope it is possible to demonstrate the slip of belt on Driving and Driven Pulley.

SPECIFICATIONS
• D.C. Motor- 1 HP, 1500 RPM, 230V variable Speed
• Driving and Driven Pulleys of equal diameters (flat pulleys)
• Brake Drum along with spring balance and rope arrangement is provided to load the system.
• Flat belts of fixed length of following belt material.
     • Fabric Belt
     • Canvas Belt
• Rubber Belt
• Belt tightening arrangement - Bearing block is sliding and dead weight can be applied to
  set the initial tension in belt.
• Speed Indicator: Two channel digital speed indicator with switch to change the channel.

EXPERIMENTATIONS
• To measure co-efficient of friction between pulley material and different belt materials
• To measure power transmitted with varied belt tension and plotting a graph of
   (T1-T2) V/S (T1+T2) i.e. "Tension Characteristics".
• To measure percentage slip at fixed belt tension by varying load on the Brake Drum and
   plot the graph of (T1-T2) V/s percentage slip i.e. ‘Slip Characteristics’. Finding a
   Creep Zone from graph.
• To measure belt slip speed and observe the limiting value of load at constant speed
   when the slip just starts.

SERVICE REQUIRED-
• Single Phase 15amp Electrical Connection.

J. P. TECHNO INSTRUMENTS
 
Slip And Creep Measurement Apparatus In Belt Drive
 
Slip And Creep Measurement Apparatus In Belt Drive
 
J. P. TECHNO INSTRUMENTS
953, Bazar Peth Road, Masur
Tal-Karad, Dist - Satara. (Mh)
Cell : + 91 - 98220 48448
Web : www.jptechnoindia.com
 
 
 
 
 
 
STATIC AND DYNAMIC BALANCING APPARATUS

DESCRIPTION
The ‘J P T I’ unit consists of a precision ground shaft rotating freely in ball bearing. For static balancing demonstration, an eccentric weight creates unbalance and value of relative weight require to balance the eccentric weight statically is determined. For dynamic balancing apparatus four weight assembly mounted on shaft is provided. Longitudinal and Angular position of weights are calculated from respective relative weight and the weight are mounted at the position. The rotation is vibration free when rotated by small motor.

SPECIFICATION
• Drive motor - Frictional horse power.
• Four balances weight each containing a different sized “Eccentric” for varying the unbalance.
• Additionally the containers, quality of precision made steel loading balls are supplied.

FEATURES

• Independent analysis of static and dynamic balancing.
• Adjustable balance weights with variable moments.
• Balance weight position accurately measured both radially and longitudinally.
• Machine can be suspended on chains for dynamic balancing.
• Completely portable and suitable for classroom demonstrations.

RANGE OF EXPERIMENTS
• Using the four weights provided Static balancing of the system using a
   moment polygon construction.
• Dynamic balancing of the above system by calculating the position of the weights
  along the shafts, by resolving and taking moments about one end of the shaft.

SERVICE REQUIRED
• Single Phase 15amp electrical Connection.
• Suitable floor space for instrument.

J. P. TECHNO INSTRUMENTS
 
Static And Dynamic Balancing Apparatus
 
Static And Dynamic Balancing Apparatus
 
J. P. TECHNO INSTRUMENTS
953, Bazar Peth Road, Masur
Tal-Karad, Dist - Satara. (Mh)
Cell : + 91 - 98220 48448
Web : www.jptechnoindia.com
 
 
 
 
 
 
UNIVERSAL GOVERNOR APPARATUS

DESCRIPTION
The ‘J P T I’ unit consists of a main spindle driven by variable speed motor. Spindle can be fitted with four different governor assemblies. A scale with pointer is provided. We can calculate each characteristics of each governor at different speed and compare the performance.

SPECIFICATION
• Drive unit - D.C. motor 0 - 1500 R.P. M.
• Watt, porter, Hartnell and Proell Governor.

RANGE OF EXPERIMENTS
• Watt, porter, Hartnell and Proell Governor.
Determination of characteristics and comparison with theoretically predicate controlling force curves.

Porter and Proell Governors:-
• The effect of varying the mass of the centre sleeve.

Proell Governors:-
• The effects of varying the rotating mass.

Hartnell Governor:-
• The effects of varying the following parameter.
Initial spring compression.

SERVICE REQUIRED
• Single Phase 15amp Electrical Connection.
Suitable bench area for mounting the instruments.

J. P. TECHNO INSTRUMENTS
 
Universal Governor Apparatus
 
Universal Governor Apparatus
 
J. P. TECHNO INSTRUMENTS
953, Bazar Peth Road, Masur
Tal-Karad, Dist - Satara. (Mh)
Cell : + 91 - 98220 48448
Web : www.jptechnoindia.com
 
 
 
 
 
 
UNIVERSAL VIBRATION APPARATUS

DESCRIPTION
This apparatus enables a comprehensive arrangement of vibration experiments to be conducted on a single Sturdy M. S. channel (100 mm x 50 mm) basic frame. The experiments are specially designed for quick and easy assembly on the frame. Many components are common to several experiments. AND THE WHOLE FRAME IS POWDER COATED.

RANGE OF EXPERIMENTS

PENDULUM EXPERIMENTS
For pendulum experiments a sub-frame is attached to the upper beam of the frame. This pendulum supported frame is provided with hardened V guide for supporting the compound pendulum. It also carries two small chucks for gripping the wires for the bi-filer suspension and simple pendulum. Following experiments can be conducted.

Expt. No. 1-Simple Pendulum
To verify the relation T= 2 II S L/g & to plot the graph T2 V/s L
Expt. No. 2-Compound Pendulum
To verify the relation T= 2 II S k + (OG)/g(OG)
To determine the radius of gyration & equivalent length of compound Pendulum.

Expt. No. 3-Bi-filer suspension- (Tensional Oscillations)

To determine the radius of gyration of body about the centre of gravity by using relation.
T= 2 K/aSL/ g

LONGITUDINAL VIBRATIONS
• Expt. No. 4-Spring Mass System
To verify the relation
T= 2II SW/ Km .g and plot the graph T2 Vs W.
Expt. No. 5 -Equivalent Spring Mass System
Study of undammed natural vibrations of beam pivoted at one end supported by tension spring at the other end.
Expt. No.6-Equivalent Spring Mass System
Study of undammed natural vibrations of beam pivoted at one end supported by tension spring at the other end, plot the of graph amplitude Vs frequency.

TORSIONAL VIBRATIONS
• Expt. No. 7-Single Rotor
To verify the relation
T= 2II S I / Kt
And to study the relationship between the periodic time & shaft length.
• xpt. No. 8-Two Rotors
To verify the relation T= 2II SIA + IB/Kt (IA+IB)
And plot a graph of F Vs 1/ I 1
• Expt. No. 9-Single Rotor with Viscous Damping
To find out the damping coefficient ‘Ct’ for various depth of damping drum (immersed in liquid) & to plot a graph of damping torque Vs depth of damping drum.
• Expt. No. 10
To find out the natural frequency of beam with & without load & to verify the Dunkerley’s Rule.
• Expt. No. 11
To study the forced vibrations for various amount of damping & to plot a graph of amplitude Vs frequency.

ACCESSORIES
• Exciter unit with fractional H. P. Electric Motor.
• Ordinary strip chart recorder for recording vibrations.
• Damper with arrangement for changing damping.

SERVICE REQUIRED
• Single Phase 15amp electrical Connection
• Floor space area of about 2 m x 2 m

J. P. TECHNO INSTRUMENTS
 
Universal Vibration Apparatus
 
Universal Vibration Apparatus
 
J. P. TECHNO INSTRUMENTS
953, Bazar Peth Road, Masur
Tal-Karad, Dist - Satara. (Mh)
Cell : + 91 - 98220 48448
Web : www.jptechnoindia.com
 
 
 
 
 
 
WIRLING OF SHAFT APPARATUS

DESCRIPTION
The ‘J P T I’ unit consists of a base upon which bearing holders and driving motor is coupled. Bearing holder is provided for fitting various bearing to provide different conditions for test shafts, viz. both end fixed and one end free. A variac provided for speed control of driving motor. The unit demonstrates the phenomenon of whirling of shaft. After the test shaft cannot be used, hence unit only demonstrate the principle.

SPECIFICATION
Shafts made from steel and of the following nominal dimensions.

Diameter mm. (inch)
Length mm. (inch)
4.5 or (3/16)
900  or   (36)
6   or (1/4)
900  or   (36)
7.5 or (5/16)
900  or   (36)

One kinematic coupling and bearing for fixed or free ends without restraint. An electric motor: Universal, 5000 rev/min. frictional horse power. A dimmer stat for controlling speed of motor.

RANGE OF EXPERIMENTS
Display of the various models of whirls for a range of shafts with
• Both end DIRECTIONALLY FREE.
•One end FIXED and other FREE.

Models of vibration can be studied and the frequency can be measured each case.

SERVICE REQUIRED
• Single Phase 15amp Electrical Connection.
• Tachometer to measure the speed.
• Suitable floor space area to mount the instrument.

J. P. TECHNO INSTRUMENTS
 
Wirling of Shaft Apparatus
 
Wirling of Shaft Apparatus
 
J. P. TECHNO INSTRUMENTS
953, Bazar Peth Road, Masur
Tal-Karad, Dist - Satara. (Mh)
Cell : + 91 - 98220 48448
Web : www.jptechnoindia.com
 
 
 
 
 
J.P.TECHNO INSTRUMENTS
 
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