Analisa Distribusi Tegangan Pada Housing Motor Hoist Overhead Crane Grinding Mill PLTU Paiton Dengan Software Berbasis Metode Elemen Hingga

Setiawan, Bagus Yudha (2017) Analisa Distribusi Tegangan Pada Housing Motor Hoist Overhead Crane Grinding Mill PLTU Paiton Dengan Software Berbasis Metode Elemen Hingga. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Grinding mill adalah alat untuk menghaluskan batubara di PLTU Paiton. Grinding mill memiliki operasi jam kerja selama 24 jam, sehingga untuk menjaga performance grinding mill harus diperbaiki setiap tahun. Grinding mill memiliki berat 5 ton, sehingga proses pengangkatan grinding mill memerlukan alat bantu yaitu overhead crane. Karena lokasi grinding mill berada di dalam tangki, maka diperlukan alat yang bernama special tool untuk membantu proses pengeluaranya. Saat proses maintenance dilakukan, terjadi kesalahan dan kegagalan. Kesalahan dan kegagalan tersebut terjadi akibat karena penggunaan special tool yang tidak tepat. Seharusnya special tool menggunakan 3 pulley namun hanya menggunakan 1 pulley, sehingga terjadi patahan di housing motor dan hoist menjadi miring. Pada tugas akhir ini kegagalan yang terjadi di PLTU Paiton dianalisa berdasarkan distribusi tegangan. Analisa distribusi tegangan dilakukan pada housing motor hoist overhead crane grinding mill PLTU Paiton dengan cara simulasi berbasis metode elemen hingga. Analisa dilakukan dengan cara simulasi pada special tool akibat pengangkatan beban grinding mill dengan variasi beban 5 ton, 10 ton, 15 ton dan 20 ton. Selanjutnya analisa dilakukan pada housing motor hoist overhead crane dengan variasi beban 10 ton, 20 ton, 30 ton dan 40 ton dan variasi dari material housing motor, yaitu tipe gray cast iron: 174HB, 201HB dan 235HB. Analisa dilakukan untuk mendapatkan tegangan maksimum, defleksi dan angka keamanan. Hasil yang diperoleh dari penelitian ini yaitu struktur special tool kondisi existing tidak aman berdasarkan pengujian beban 20 ton, dimana tegangan maksimum terjadi sebesar 374,2 MPa dan angka keamanan sebesar 0,6021. Berdasarkan hasil simulasi roller motor hoist diperoleh tegangan terbesar terjadi pada pembebanan 40 ton tipe housing gray cast iron 174HB sebesar 213,9 MPa dan defleksi sejauh 0,763mm. Hasil simulasi housing motor menunjukan tegangan terbesar terjadi pada beban 40 ton tipe gray cast iron 235HB sebesar 82,74 MPa dan defleksi sejauh 0,3939 mm. ================================================================================= Grinding mill is tool to refine coals in PLTU Paiton. Grinding mill has to be repaired annually because coals refinement process is happened everyday. Grinding mill has 5 ton in weight, so grinding mill lifting process used tool which is overhead crane. Because grinding mill is located inside tank so it is needed to use tool which is special tool, were to help release process. When maintenance process was done, mistakes and failure was experienced by PLTU Paiton maintenance staff. Mistake and failure were caused by special tool application which it is should be used with 3 pulley, actually it is only used with 1 pulley. So fracture was found at housing motor and hoist became bent. Stress distribution analysis is done at housing motor hoist overhead crane grinding mill PLTU Paiton by simulation based on finite element method. Stress distribution analysis is done by simulation at special tool about grinding mill weight lifting with variation of 5 ton, 10 ton, 15 ton and 20 ton in weight. Next simulation is done at housing motor hoist with variation of 10 ton, 20 ton, 30 ton and 40 ton in weight, and variation of housing motor material which is gray cast iron 174HB, 201HB and 235HB. Analysis is done by analysis maximum stress, deflection and safety of factor. The result of this study are special tool structure existing condition is not safe based on 20 ton testing, where maximum stress that happened is 374,2 MPa and safety of factor is 0,6021. Based on roller motor hoist simulation result, it is found maximum stress that happened on 40 ton and housing gray cast iron type 174HB is 213 MPa and deflection is 0,763 mm. housing motor result shown maximum stress that happened on 40 ton and housing gray cast iron type 235HB is 82,74 MPa and deflection is 0,3939 mm.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Metode Elemen Hingga (Finite Elemen Analysis), Overhead Crane, Teori Kegagalan Material Brittle, SolidWork, Simulasi.
Subjects: T Technology > T Technology (General) > T56.8 Project Management
Divisions: Faculty of Industrial Technology > Mechanical Engineering > (S1) Undergraduate Theses
Depositing User: - BAGUS YUDHA SETIAWAN
Date Deposited: 28 Apr 2017 08:20
Last Modified: 08 Mar 2019 07:02
URI: http://repository.its.ac.id/id/eprint/3729

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