• SUBJECT-THEORY OF MACHINES.�BRANCH- MECHANICAL ENGINEERING.�SEMESTER- 4^th.�CHAPTER- FIVE.�FACULTY- Er. BARENDRA NATH MOHANTA.�

TOPIC- BALANCING OF MACHINE

​

​

​

INTRODUCTION

A balancing machine is used to determine the location and amount of unbalanced masses on a rotor.  The rotor is mounted on the machine bearings and the machine spins the rotor.  Soft bearing machines measure the displacement of the ends of the rotor and bearings.  The machine measures this displacement and the phase angle, then computes the unbalance present.  IRD^® Balancing machines then provide the operator with corrections to be made to the rotor via addition or subtraction of weight.

NEED OF BALANCING

​

• When assessing a rotor, unbalance cannot be visually identified.  A hole or added weight on a rotor may be there from an initial balancing of the rotor, not the cause of unbalance.  The only way to assess unbalance is via the vibration or the force it generates.

TYPE OF BALANCING

METHODS

• 1.  Chose the Rotor Setup.

Our Balancing Instruments are set up to handle the 9 different rotor configurations.  Once you choose the rotor configuration, you are instructed to spin the rotor and take a measurement reading, then stop the rotor.

2.  Calibration of the Machine with the Rotor

• The Balancing Instrument will then instruct the user to add a known weight to the first correcting location on the left hand side, enter the illustrated required dimensions, spin up the rotor and take a measurement, stop the rotor, then remove the left hand weight and place it in the right hand correction plane and repeat.  Stop the rotor and remove the known weight.  The instrument then uses these measurements to calibrate itself.

3.  Balancing the Rotor

• The Balancing Instrument now displays both the left and right hand correction amounts and the angular location of the correction weights for the addition or subtraction (user specified) of material.

​

THANK

YOU