Akio Hizume

Torsional vibration monitoring method and an apparatus for performing the same

The present invention is a torsional vibration monitoring method and an apparatus for performing the same, in which torsional vibrations produced in a rotating shaft system for use in such as a turbine generator are measured at a small number of certain positions therealong at which the measurements are possible, the torsional vibrations are linearly decomposed and torsional vibrations at arbitrary positions on the rotating shaft system are estimated from the linear decompositions.

Wakamatsu high-temperature turbine verification test project. A study of a large capacity coal fired USC plant.

This paper reviews the design of the EPDCs Wakamatsu high-temperature turbine and the operating experience of its first step verification test STEP I, which features main/reheat steam temperatures of 593°C/593°C. In designing this turbine, a number of new concepts for elevated temperature use were incorporated, and several types of new heat resistance steels were used in the major parts. Since the initial startup in November, 1986, the operating experience of Wakamatsu high-temperature turbine STEP I so far has demonstrated high reliability, and many valuable data are being obtained, proving the practicality of a large capacity USC turbine.