TG403 - Turbine Generator Balancing Workshop

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3 days - 1.9 Continuing Education Units Awarded


Course Dates Download Brochure PDF
USD 2,195.00


This class is intended to improve the participants' ability to direct a mechanical balance program on steam turbine-generator equipment. (Gas turbines and hydro turbines are discussed as participants require). It is the intent that, upon completion of this Seminar, the participant will be able to conduct a routine balance program on most two/bearing per span turbines.   In addition, participants will learn to evaluate vibration symptoms as they impact turbine generator operations.  This Seminar is scheduled once per year at our facilities in Sarasota FL to support a degree of hands-on activities (this topic is included in our Advanced Steam Turbine Maintenance (TG401) Seminar without handout hands-on).

A topical outline is listed here for your reference:  Vibration Theory, Use of Vibration Measuring Equipment, Recording Data, Performing a One-Shot Calculation, Performing Measured Effect Analysis, Installing Balance Weights, and Low Speed Balancing.  Lot’s of practice is included throughout.

OBJECTIVES:
Upon the completion of this Seminar the participant will be able to:
  1. Describe fundamental terms and concepts important to a vibration analysis.
  2. Relate the use of vibration measuring instruments to your applications.
  3. Describe normal conventions used during balancing and how they relate to your equipment.
  4. Demonstrate the ability to calculate a "first-shot" using the "one-shot method" for calculating that shot location.
  5. Demonstrate the ability to calculate a "second-shot" using the "measured-effect" method for calculating that shot location and size.
  6. Demonstrate the ability to translate calculated weight information to the actual installation of weights on any given rotor.
  7. Demonstrate the ability to conduct a "low-speed balancing" program on a bowed rotor.
Seminar OUTLINE:

Day One
Vibration Theory:  We need to make sure everyone is one the same playing field before we get into serious vibratory discussions.  In this section we accomplish this goal by reviewing vibration definitions and terms.
Vibration Measuring Equipment:  A balancing engineers’ success depends greatly upon proper use and application of the vibration measuring equipment, whether it is OEM installed or a portable analysis kit.  We will review how to properly apply this equipment to the task at hand.  Discussions will include the older TSI systems, portable equipment such as an IRD, and Bently-Nevada systems.
Recording Data:   It is especially important to NOT error in the collection of vibration data.  It is easy to error, especially if the time is 0345 and you have been at the plant since the day before.  The best way to avoid error is to make use of conventions and to consistently follow these conventions.  This, along with actual data collection, will be discussed at this time.

Day Two
One Shot Calculations:  This presentation begins with a thorough discussion of High Spot Theory, then continues with the vector manipulations that are required to locate balance weights on a 2-bearing/span rotor.  Theories are presented and participants are then expected to practice.  Here is where we spend some time studying different machine types and relating some experiences that the instructor (and others) have gained on these machines.
Measured Effect:  Regardless of the success of the first balance weight installation, information has been gained.  This presentation is intended to practice the participant at analyzing this information and making use of what is learned to better install a 2nd shot (assuming it is needed).

Day Three
Practice:  Depending upon participants’ needs the opportunity will be presented to apply what has been learned on a table-top rotor kit.  Perfect practice makes perfect application and that is our goal.
Installing Balance Weights:  There are some hazards and some significant opportunities to err when installing weights physically onto rotors.  Hazards are discussed so they may be better avoided.  Conventions are discussed to help avoid balance weight location errors.  Procedures are discussed to be sure the weight is installed correctly.
Low Speed Balancing:  In this presentation we will discuss how to assess the need for low speed balancing, some things to do to avoid error, how to setup equipment, how to calculate mid-span weight placements when dealing with bowed rotors.