The shafting of large steam turbine generator set is composed of several rotors. On large turbine generators, the outer bearings could be up to 25 mm above the leve of the central bearings. Particular emphasis will be placed on large steam units. Alignment of the shaft necessitates the outer bear ings being raised. Method for steam turbine halfshell alignment general electric. Instruction manual for single stage 350, 500, and 700. A method for aligning a component of a steam turbine, comprising the steps of. Prior to the actual alignment procedure, it is essential that the supporting. In 1980s, laser shaft alignment technique became a hot. Steam turbine hpip and lp and the electric generator. For turbines supplied with options such as forced or circulating lubrication systems, alternative speed control systems.
When ge conducts your performance tests, you gain the high level engineering expertise of a trusted name in the power generation industry. Specializing in all aspects of gas and steam turbine inspection, data analysis and alignment. Ge offers a full steam path repair solution for major steam turbine diaphragm repairs. The shafting of large steam turbine generator set is composed of.
Various methods of alignment will be addressed including tight wire, laser, eragcat, alignment bar, and lead wire. How to get rid of unwanted tattoos naturally without painful,expensive and harmful procedures. The steam turbine alignment seminar teaches participants the theory and correct alignment practices for steam turbines generators. The alignment of turbinegenerator sets poses unique challenges that only the best laser shaft alignment systems can overcome. A practical guide to shaft alignment plant services. Shafting alignment computing method of new multibearing rotor. Instruction manual for single stage 350, 500, and 700 frame steam turbines manual 107a. Not the least of these is the difficulty of turning the shafts. Consequently, there is a need for a turbine servicing procedure that can reduce the time.
Steam turbine rotor vibration that results in premature failure of blades and other components is one of the most serious problems in power plant operations. For the alignment to be successful, both the equipment and the overall system must be property designed, and the installation must be well done. In this procedure an optical level, or transit, is cirectea at a target set in. It is often necessary to deliberately misalign par ticular bearings when cold so that an acceptable ho alignment is achieved. The purpose of this tutorial is to highlight important items that must be done prior to the final alignment adjustment, as well as to provide some details of the final alignment procedure. This video show you understanding how to assembly the steam turbine. The alignment of turbine generator sets poses unique challenges that only the best laser shaft alignment systems can overcome. As an example, a machine with a short flexible coupling running at 1800. In most cases a quick glance at the table will tell whether coupling misalignment is allowable or not. How to use this manual march 2011 instruction manual 107 revision a dresserrand. Ge currently conducts over 400 thermal performance tests each year, on gas turbine, steam turbine, and combined cycle power plants from all manufacturers.
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