Method and apparatus for the aligning and installation of wicket gate bushings in a unitized stay ring-discharge ring of a hydro-turbine machine

摘要

Bushing and sleeve assembly are attached in an alignment fixture and placed in the stay ring-discharge ring. An internal pilot bearing is placed in the headcover to accommodate an aligning bar which is lowered through the headcover and pilot. The lower end of the aligning bar is engaged with the aligning fixture and the pilot can then be engaged with the headcover to automatically align the bushing and sleeve assembly with the two headcover bushings at the upper bearing pilot and the internal intermediate pilot.