kesc bqps ii - maintenance · kesc bqps ii reported by: rao muhammad shahbaz manager condition...

KESC BQPS II

Reported By: Rao Muhammad Shahbaz

Manager Condition Monitoring

Date: 17-Jan-2013

Steam Turbine Vibration Status Report

Activity Performed: Dynamic Balancing

Description:

At bearing #4, shaft vibration reading from X-probe was observed 114 microns. After considering the

dynamic balancing as root cause elimination activity, it was performed by HE Engineer with the aid of

ADRE system.

Balancing Activity:

Balancing activity was performed on LP rotor. Selected planes were near bearing no. 3 & 4. Given

below was the status:

Speed= 3000 r/min

Reference Run (On which Dynamic Balancing was decided):

After addition of correction weight, there was not much change in vibration. So additional weight was

removed and now on these two bearings, 1X status is as follows:

On the next page, unfiltered orbits, polar plots, shaft center line plot & bar graphs of all 6 bearings are

attached.

Bearing 3 (1X)

X-probe= 21µm @ 113˚

Y-probe= 35µm @ 254˚

Bearing 4 (1X)



Bearing 3 (1X)



Bearing 4 (1X)

X-probe= 100µm @ 118˚


KESC BQPS II



Current Bar Graph of all 6 Bearings:

KESC BQPS II



Run Up of Steam Turbine:

Bearing #1:

Polar Plot

Shaft Center Line

KESC BQPS II



Waterfall

Bearing #2:

Polar Plot

KESC BQPS II



Shaft center line

Waterfall

KESC BQPS II



Bearing #3:

Polar Plot

Shaft Center line

KESC BQPS II



Waterfall

Bearing #4:

Polar Plot

KESC BQPS II



Shaft Center Line

Waterfall

KESC BQPS II



Bearing # 5:

Polar Plot

Shaft Center Line

KESC BQPS II



Waterfall

Bearing #6:

Polar Plot

KESC BQPS II



Shaft Center Line

Waterfall

kesc bqps ii - maintenance · kesc bqps ii reported by: rao muhammad shahbaz manager condition...

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