Description
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Journal Bearing Apparatus
DESCRIPTION:
The apparatus consists of a plain steel shaft encased in a bearing and directly driven by a small electric motor. The bearing is freely supported on the shaft and sealed at motor end. The motor speed is precisely controlled by control unit and sealed at motor end. The motor speed is precisely controlled by control unit and can be run in both directions. The bearing contains twelve equi-spaced pressures tapping around circumference and four along the axis. All are connected by light flexible plastic tube to the manometer so that the pressure head of all sixteen point can be observed at a time. The bearing can be loaded by attaching weight to the arm supported beneath it.
SPECIFICATIONS:
1. Journal : 50 mm. dia. (nominal)
2. Bearing : 55 mm. dia.
3. Weights : 4 adjustable weights
4. Motor : D.C. shunt Motor, 3,000 RPM.
5. Control panel : For speed control of Motor
6. Manometer panel : 16 tube Manometer
7. Oil recommended : SAE 10
EXPERIMENTS:
1. Observation of the pressure profile at various conditions of load and speed.
2. Plotting the Cartesian and polar pressure curves.
3. Plotting the theoretical Summerfield curves.
SERVICE REQUIRED:
1. Electric Connections : A.C Single Phase, 230v. supply with ear thing.
2. Stand Alone Space : 1.5m X 1.5m X 4m Height.
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Specifications:
1.D.C. Motor – 1 HP, 1500 RPM, variable speed. 2.Driving & Driven puilies of equal diameters. 3.Brake drum along with spring balance. 4.Fiat Belt of fixed length of following materials – (i)Fabric Belt (ii)Canvas Belt. (iii)Rubber Belt. 5.Belt tightening arrangement. 6.Speed Controller unit. 7.Two Channel digital RPM Indicator. 8.Stroboscope.Experimentation –
1. To measure co-efficient of friction between pulley material and different belt materials. 2. To measure power transmitted with varied belt tensions and plotting graph of (T1 – T2).Tension Characteristics. 3. To measure percentage slip at fixed belt tension by varying load on brake drum and plot graph of (T1-T2) Vs.percentage slip.i.e. Slip Characteristics. Finding a creep zone from graph. 4. To measure belt slip speed and observe the limiting value float at constant speed when the slip just starts.Service Required:
1.230 V.A.C. stabilized power supply 2.Space -. 1.5m x 1.5 m.
Coriollis Component Of Acceleration
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Specifications:
1.Main Tank with fiberglass lining. 2.Rotating Arms 9/6 mm dia, 300 mm long. 3.Motor – Swinging field, D.C., 0.5 HP. 4.Rotameter 5.Monoblock Pump 6.Control Panel comprising of – (i) Speed Control Unit. (ii) Speed Indicator. (iii) Necessary switches. 7.Rigid support frame.Range of Experiment:
Coriollis Component of Acceleration can be determined at various speeds of rotation and water flow rates.Service Required:
1.A.C. Single Phase .230 V. stabilized supply. 2.Floor Space -1.5 m X 1.5 m.
Static Dynamic Balancing Apparatus
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EXPERIMENTS OF STATIC & DYNAMIC BALANCING APPARATUS:-
1. To balance the masses statically and dynamically of a single rotating mass system. 2. To observation of effect of unbalance in a rotating mass system.UTILITIES OF STATIC & DYNAMIC BALANCING APPARATUS:-
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1. Drive Motor -- FHP Motor, variable speed, with speed controller 2. Balancing Weight -- 4 Nos. of Stainless Steel with different sized eccentric Mass for varying unbalance 3. Rotating Shaft -- Material Stainless Steel 4. The whole Set-up is well designed and arranged in a good quality painted Structure
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Specifications:
1. External type Epicyclic Gear Train: a. Bearing blocks for input & output shafts. b. A gear train with Holding drum and handle. 2. Internal Type Epicyclic Gear Train: a. A compact Gear Train. b. Variable speed D.C. Motor c. Rope brake arrangement to measure output torque and holding torque. 3 Control Panel comprising of a. Digital Ammeter and Voltmeter. b. RPM Indicator. c. Speed Controller.Experimentation –
1. To measure epicyclical gear ratio between Input shaft and Output shaft. 2. To measure epicyclical gear ratio between Input shaft and holding drum. 3. To measure Input torque, Holding torque and Output torque.Service Required –
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FEATURES
1.Rigid construction & Compact Unit. 2.Assessment of cutting forces by giving due consideration to various parameters like depth of cut, material, cut, material, speed and feed. 3.Eassy in handling & Digital force indicators to measure three forces simuleniously.SPECIFICATIONS-
1.Mechanical sencing unit with set of octagonal rings and strain gauges. 2.Three channel digital force indicator with balancing potentiometers and polycarbonate front plate. 3.Range of force measurement in coordinate direction – 0 to 500 kg. 4.Over all size of mechanical unit- 300 x 300 mm.SERVICE REQUIRED
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The unit consists of a base upon which the bearing holders and driving motor are bearing can be fitted in a holders to end conditions for test shafts, viz. Both end fixed and one end free, one end fixed. A Variac provided control of driving motor. The unit demonstrates the phenomenon of whirling of shafts with single rotor. As the test is destructive, after the test cannot be used, hence the unit only demonstrates the principle.
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