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what is runout? how it is measure? which is the refrence?
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Answer Posted / phani
runout means the radial play of the rotor or shaft.
it must be in between 0.02 to 0.03 for large turbine rotors.
measuring method:
First of all u have to conform how many areas u want to
take run out. On that basis u put the dial guages on that
flanges or bearing journals.
setting of dial guage is in such a way that it must be sit
on the parting plane and the dial point must be touch that
corresponding flange or bearing journal.
press the dial upto 5mm pressure. and set the dial into
zero and that is the reference point i.e. zero point
rotate the rotor and take the readings for every 90 degrees
of rotation.
At zero degree what is the reading, not down
at 90 degree reading, 180 deg reading, 270 deg reading and
finally again 0 degree reading.
Out of these check where is the max reading u observed.
Whether the max reading is within the limit or not u check
thatone.
This total process i am telling is regarding turbine rotor
run-out only.
But whatever it may be the process is same but the limits
may change.
| Is This Answer Correct ? | 91 Yes | 8 No |
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