This document summarizes Schaeffer Precision Alignment's laser tracker services for inspecting steam turbines. They have experience inspecting hydro, gas, and steam turbines for over 260 clients. Their laser tracker technology allows precise inspection and alignment of individual turbine components. Inspections can locate components, monitor movement over time, and ensure reinstallation within tight tolerances. Schaeffer Precision Alignment provides a comprehensive solution for precision turbine maintenance and inspection.

1. steam turbine presentation

2.  Professional dimensional metrology service provider
to over 260 clients
 Experience in hydro, gas, and steam turbine applications
 Successfully integrating the laser tracker technology to the
power industry
 Client list includes:
Entergy, NRG, General Electric, the Wood Group,
SulzerHickham, AEP, Dynegy, Tri-State Generation,
Mobley Contractors Inc., US PowerGen, Corrugated
Services Incorporated, EnergyCo, and TXU.
 SPA technicians are professionally trained and meet all
requirements for OSHA and TWIC certification.

4. •API T3
•Leica LTD 600 Points of Interest…
The laser tracker is a portable measurement • Versatility
system that relies on a laser beam to - SA coordinate measurement software
accurately measure and inspect in a spherical - provides several import / export options
volume up to 200 feet. Designed for high- - IFM or ADM laser capabilities
• Speed
accuracy measurements in all operating - minimal instrument setup and warm-up time
conditions it has become the benchmark in - data collection time is significantly reduced
general industry precision applications. - negate the effects of thermal growth
• Repeatable accuracy
- capable of 0.001” repeatability
• Efficiency
- 1 location can render copious amounts of data
- each coordinate represents a X,Y,Z value
• Proven technology
- utilized in every facet of industry
- computer aided technology
• Data Manipulation
- eliminate human error in measurement data
- expedite data processing times
- easy data transfer in multiple formats

5. Nelson Plant : West Lake, LA NRG Limestone : Jewett, TX
Lewis Creek Plant : Willis, TX NRG Big Cajun : New Roads, LA

6. Master Control Layout
Coupling / Shaft Alignment (End to End)
Steam Path Alignment (HP, IP, & LP)
Squat / Load Check (Hot/Cold)
Individual Component Location (Removal/Installation)

7. Monitoring points (as seen left) are
easily installed in the concrete deck
surrounding the turbine. By utilizing
the capabilities of the laser tracker and
the coordinate measurement software
we are able to produce a master
control system that is relevant to the
turbine, from end to end. This process
allows the tracker to be positioned at
any vantage point all the while
maintaining a relationship with the
centerline of the turbine or assigned
location. Every control point and data
point has a X,Y,Z coordinate
value, relative to the centerline of the
turbine. The job file and/or coordinate
file is then saved, exported, and is
applicable for all future alignment
projects on the unit.

8. Compare current position of
shaft to OEM’s catenary design
• ability to compare and/or locate to
exact locations
• locate center of shaft at each
Precise location is bearing
recorded and established
Complete inspection in
• SPA maintains permanent approximately 8 hours
measurement history on
each turbine • including set-up, warm-
up, data collection and
• comparisons can be made to
analysis
monitor turbine movement
and wear tendencies
Data Processing
• easy Rotation of the components is
analysis, manipulation, and not required
comparison
• shaft memory does not effect
• compare data from short measurement data
periods, months, years, eve
• couplings stay bolted, eliminate
n decades
rim and face checks
• instantly recall data from
previous inspections Use existing control layout
• instrument set-ups become less
frequent and painless
• the ‘master control system’ maintains
relevance throughout the process

13. Have confidence in a Report data in relation to Inspections can be done Data is collected and
proven technology a specified component on any component stored electronically
• capable repeatability of • oil bore, bearing • if requested, the rotor can • eliminate human error in
0.001” bore, inner gland, blade be inspected on-site data processing
• reduce downtime, average ring, diaphragm, etc. • concentricity and/or • receive a visual
inspection time: 4 to 6 • know the horizontal and circularity reports can be representation of all
hours vertical location of any provided deviation
component • any individual component • data can be processed to
• make adjustments prior to can be inspected, either in meet the specifications of
rotor delivery position or removed any project

14. Inspection of the
inner cylinder
Complete
inspection of
the HP
Checking the symmetry and
perpendicularity of the outer casing

15. Utilizing the API tracker to collect Laser tracker setup for alignment
data on the LP diaphragms of a 913 inspection of two low pressure
kilowatt steam turbine turbines, LP A and LP B

18. Using the existing
Compare results at
control
various states
layout, established by
the USMN, data can be • cold to hot
collected at the bearing • cold to ambient
and recorded at • hot to ambient
location. In mere hours
we can collect and
analyze measurement
data.
Compare inspection Compare results from
results relative to load past and present
capacities inspections
• full load • chronologically map
• partial load movement
• any % of load • graph movement over
weeks, months, or
years
• compare trends

20. Example: The removal and re-installation of a generator.
“Prior to removal of the generator , its exact or „as found‟ location is
recorded. This is done in reference to the master control system layout. By
gathering data at the generator couplings the measurement process
establishes a center point location. The installation process uses the
generator couplings to relocate the component to its previous
position, horizontally and vertically in relation to the center point location.
This process is not only applicable to the relocation of a generator but to
any component that must be removed and put back into place under
stringent tolerances.”

21. Schaeffer Precision Alignment, Inc.
2510 West Main
Atlanta, Texas 75551 Michael E. Schaeffer
President
903.796.7941 903.826.3535
info@schaefferprecision.com
www.schaefferprecision.com