English to Portuguese Tech/Engineering Engineering (general) peças

Install FME in lower bearing cavities, protect the rotor journals.
Install sling retainer on #2 journal, torque bolts to 100 ft-lbs
This Step is optional; the lower half No. 2 bearing only needs to be removed if the rotor lifting configuration requires the sling to be placed at the No. 2 journal location.
Install a sling retainer (rotor block-off) plate, supplied with the beam kit, on the exhaust end of the rotor outboard of the #2 journal and bearing using 12, ⅝ in.
If lower half No. 2 bearing was removed, lifting strap should be placed at either end of the journal surface. If the lower half No. 2 bearing is still in the unit, lifting strap needs to be placed outside bearing housing forward of the air seal next to tapered area of rotor, but not on tapered area


Abstract During the normal operational life of a turbine, its rotor journal seating surfaces are wearing and therefore, repair operations, including turning and grinding of such surfaces and next rotor balancing on the balancing machines, are carried out. Traditional turbine rotors machining is provided by fixing them through the centers and demands the corresponding large size machine tools and the strategy «machine tool to rotor» is often used. To minimize mobilization and transportation cost, the problem of the turbine rotor restoration by using centerless grinding technique on the lightweight horizontal balancing machines is resolved. A computer simulation model of such grinding with workpieces located on their machining surfaces is presented. To validate the approaches, a proposed computer simulation was carried out. Theoretical and computational investigations demonstrate that the deviation from the roundness of a workpiece may be reduced from the initial value of half a millimeter to a final value of 10 micrometers by using a special location of cutting tools.