14-01-2014, 04:34 PM
BALANCING OF RECIPROCATING MASSES
Aim:
To balancing of reciprocating masses
Description :
The Setup consists of the following
1. Base: 75 * 40 * 6 channel
2. Motor: Variable Speed Motor 0- 6000 RPM, mounted with Flange
3. Cylinder: Single Cylinder with connecting rod, piston in bearings. Crank is coupled directly
with Motor with Love-joy Coupling
4. Weights: Weights are added on piston on a bolt either axially or eccentrically to simulate
unbalance.
Provision is made from to add weight on crank in opposite direction
5. Controls: The Control consists of a variac and an RPM Meter
6. Crank weights are flats with drilled holes, 20 – 50 gms
Procedure:
Initially remove all the weights, bolt from the system
Start the motor, give different speeds. Observe vibration on the system, note down the speed
Repeat it for different speeds, note them down
Add some weights on piston top, either eccentric or co-axial. Start the motor, fix at earlier
tested speed.
If Vibrations are observed, one of the following has to be done to remove the unbalance
Either remove some of the weights from Piston, run at tested speed and observe
Add weights in opposite direction of crank, run and observe vibrations at tested speed
Combination of both the above