steam turbine presentationschaeffer precision alignment, inc.

Professional dimensional metrology service provider to over 260 clientsExperience in hydro, gas, and steam turbine applicationsSuccessfully integrating the laser tracker technology to the power industryClient 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.

The laser tracker is a portable coordinate measurement system. Its lean construction and compact dimensions make for easy one-person transportation in full compliance with labor department regulations. Our technicians undergo routine physical examinations and maintain current passports should the work assignment require international travel.

The laser tracker 101API T3Leica LTD 600The laser tracker is a portable measurement system that relies on a laser beam to accurately measure and inspect in a spherical volume up to 200 feet. Designed for high-accuracy measurements in all operating conditions it has become the benchmark in general industry precision applications.Points of Interest… Versatility - SA coordinate measurement software - provides several import / export options - IFM or ADM laser capabilities Speed - minimal instrument setup and warm-up time - data collection time is significantly reduced - 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

API T3

Leica LTD 600

Versatility

Speed

Repeatable accuracy

Efficiency

Proven technology

Data Manipulation

In the first quarter of 2009, 4 power facilities are experiencing the benefits of implementing laser tracker technology in steam turbine alignment…Nelson Plant : West Lake, LALewis Creek Plant : Willis, TXNRG Limestone : Jewett, TXNRG Big Cajun : New Roads, LA

Master Control LayoutCoupling / Shaft Alignment (End to End)Steam Path Alignment (HP, IP, & LP)Squat / Load Check (Hot/Cold)Individual Component Location (Removal/Installation)Measurement Applications

the Master Control Systemcontrol point layoutMonitoring 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.

COUPLING / SHAFT ALIGNMENT

Our alignment process is based upon the designed catenary curve data. By collecting data at each bearing we have the capability to relocate the shaft to its designed location, altogether eliminating the need for a “rim and face “ check and hours of unnecessary adjustments.

The insert below represents the data obtained from an end to end coupling inspection. Note, once the data collection process is complete we have the flexibility to depict measurements of an individual component or any number of components, based upon your needs.

Below is an example of a custom graph depicting vertical data ‘as found’ and after adjustments. Our technicians have the onsite capability to create charts and diagrams to met exact job specifications.

Below is custom graph depicting the horizontal deviation, ‘as found’ and after adjustments. Note, the basis of horizontal alignment located at the LP #3 and #4 bearings is identified as the B.O.A.

STEAM PATH ALIGNMENT (HP / IP / LP)

The use of the laser tracker allows S.P.A. to collect data that was previously inaccessible. Measurement data can now be gathered on any component at any location. Within minutes of obtaining the data it can be manipulated to evaluate the relationship between components, a feature exclusive to coordinate measurement software .Inspection of the inner cylinderComplete inspection of the HPChecking the symmetry and perpendicularity of the outer casing

LP steam path alignment inspectionUtilizing the API tracker to collect data on the LP diaphragms of a 913 kilowatt steam turbineLaser tracker setup for alignment inspection of two low pressure turbines, LP A and LP B

Below is an example of a 3 dimensional screen shot from the SA software following the final inspection process… In order from right to left: API laser tracker, main oil pump, the HP/IP turbine, and the LP coupling.

You have the benefit of viewing measurements from multiple inspections. Here, adjustments were made, re-inspected and re-checked prior to March 31st. The ability to recall data electronically is what sets the technology apart.

SQUAT CHECK / LOAD CHECK

Sample data from a squat check done on a 6 bearing steam unit. The custom spreadsheet depicts the movement between cold and hot readings. Note, data is reported for all 3 dimensions (X,Y,Z) in both the positive and negative directions. All measurement data is readily available for review and analysis.

When precision measurement and allowable tolerances become vital. We can utilize the versatility of the laser tracker and the coordinate measurement software to met your exact specifications. We have the ability to aid in the removal and installation of individual components: generators, exciters, the inner cylinder or outer casing, the rotor, etc…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.”

Schaeffer Precision Alignment, Inc. 2510 West MainAtlanta, Texas 75551903.796.7941www.schaefferprecision.comMichael E. SchaefferPresident903.826.3535schaefferprecision@sbcglobal.netAnthony W. FrancisDivision Manager : Laser Tracker903.244.3511tony.spa@sbcglobal.netContact Information