TORSI

Abstrak
ABSTRAK
Analisa getaran telah dilakukan pada turbin pembangkit listrik di PLTP Kamojang Unit I Drajat dimana turbin tersebut terjadi getaran maksimum sebesar 8,00 mm/s.rms. Hasil analisa karakteristik data pengukuran menunjukkan terjadinya unbalance pada rotor turbin. Proses balancing dilakukan dengan penambahan masa eksentrik sebesar 958 gram dengan jarak 25 cm dari sumbu poros dan berhasil menurunkan level getaran menjadi 2,71 mm/s.rms dimana level getaran tersebut berada dibawah batas toleransi operasi mesin.

Kata kunci: Getaran turbin

ABSTRACT
A vibration analysis was conducted at PLTP Kamojang Unit I Drajat to overcome vibration of 8,00 mm/s.rms excited at a turbine rotor. The analyses came with a conclusion that the vibration was caused by unbalance and the rotor need to be balanced by adding 598 gram of eccentric mass at a position 25 cm from its shaft axis. Experimentally showed that after balancing, a vibration level reduce to 2.71 mm/s.rms indicating that the turbine can be run in long-term operation .

Keyword: Turbine vibration