Analisis Penyebab Rubbing pada Kompresor Turbin Gas MS5001PA (Area Stage 4-9)

Rais, Faiq Attar Mayfrido (2025) Analisis Penyebab Rubbing pada Kompresor Turbin Gas MS5001PA (Area Stage 4-9). Project Report. [s.n]. (Unpublished)

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Abstract

Rubbing pada kompresor Gas Turbine GE Frame 5 (MS5001PA) merupakan salah satu permasalahan yang dapat memengaruhi keandalan dan performa turbin. Analisis ini bertujuan untuk mengidentifikasi akar penyebab terjadinya rubbing pada area kompresor stage 4–9 berdasarkan hasil Major Inspection. Metode yang digunakan meliputi studi literatur, observasi lapangan, pengumpulan data inspeksi, serta analisis akar penyebab menggunakan fishbone diagram. Data yang dianalisis berupa hasil pengukuran compressor rotor clearance, run out, dokumentasi visual, dan riwayat pemeliharaan unit. Hasil analisis menunjukkan bahwa rubbing tidak disebabkan oleh satu faktor tunggal, melainkan kombinasi beberapa faktor, yaitu indikasi static misalignment yang telah terjadi sejak Major Overhaul sebelumnya, deformasi pada compressor AFT casing, serta rotor bow akibat downtime yang panjang. Selain itu, hasil inspeksi menunjukkan bahwa unit telah memiliki riwayat clearance yang sempit sejak Major Overhaul sebelumnya sehingga memperbesar potensi terjadinya kontak antara rotor dan stator. Berdasarkan hasil analisis, direkomendasikan penggantian compressor AFT casing atau pelaksanaan grinding dengan pengawasan Technical Field Advisor (TFA) sesuai kondisi komponen dan hasil inspeksi.
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Rubbing in the compressor section of the GE Frame 5 (MS5001PA) Gas Turbine is one of the issues that can affect the reliability and performance of the turbine. This study aims to identify the root causes of rubbing in compressor stages 4–9 based on the results of the Major Inspection. The analysis was conducted through a literature review, field observations, inspection data collection, and root cause analysis using a fishbone diagram. The analyzed data included compressor rotor clearance measurements, run-out measurements, visual inspection records, and the unit maintenance history. The results indicate that the rubbing was not caused by a single factor but by a combination of several factors, including indications of static misalignment that had existed since the previous Major Overhaul, deformation of the compressor AFT casing, and rotor bow due to prolonged downtime. In addition, the inspection results showed that the unit had a history of narrow clearances since the previous Major Overhaul, which increased the potential for contact between the rotor and stator. Based on the analysis, it is recommended to replace the compressor AFT casing or perform grinding under the supervision of a Technical Field Advisor (TFA), depending on the component condition and inspection results.

Item Type:	Monograph (Project Report)
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ1058 Rotors T Technology > TJ Mechanical engineering and machinery > TJ778 Gas turbines T Technology > TJ Mechanical engineering and machinery > TJ990 Compressors
Divisions:	Faculty of Vocational > Mechanical Industrial Engineering (D4)
Depositing User:	Faiq Attar Mayfrido Rais
Date Deposited:	30 Jul 2026 01:35
Last Modified:	30 Jul 2026 01:35
URI:	http://repository.its.ac.id/id/eprint/139847

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