ANALISIS PERFORMA TRIBOLOGI JOURNAL BEARING TERHADAP VARIASI VISKOSITAS PELUMAS DENGAN METODE COMPUTATIONAL FLUID DYNAMICS (CFD)

*Bernadus Andika Putranto  -  Department of Mechanical Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275, Indonesia
Mohammad Tauviqirrahman  -  Department of Mechanical Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275, Indonesia
Sulistyo Sulistyo  -  Department of Mechanical Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275, Indonesia

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Abstract

Journal bearing merupakan elemen mesin yang berfungsi menopang poros berputar dan mengurangi gesekan melalui pembentukan film pelumas hidrodinamik. Penelitian ini menganalisis pengaruh variasi grade viskositas pelumas (ISO 10, ISO 15, ISO 22, dan ISO 46) terhadap performa tribologi journal bearing menggunakan metode Computational Fluid Dynamics (CFD). Kavitasi dimodelkan menggunakan model Zwart-Gerber-Belamri (ZGB). Simulasi dilakukan pada rasio eksentrisitas ε = 0.8 dan kecepatan putaran 2.750 rpm. Parameter evaluasi meliputi tekanan maksimum (Pmax), load carrying capacity (LCC) dan friction force (Ff). Hasil simulasi menunjukkan bahwa peningkatan viskositas dan kecepatan putaran meningkatkan Pmax, LCC, dan Ff secara konsisten. 3.             Secara keseluruhan, peningkatan viskositas mempengaruhi performa pelumasan journal bearing. Peningkatan viskositas fluida tidak hanya mempengaruhi kemampuan menahan beban, tetapi juga berkontribusi terhadap kenaikan gaya gesek, sehingga diperlukan tingkat viskositas fluida yang optimal untuk memperoleh keseimbangan antara kapasitas pembebanan dan performa gesek sistem.

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Keywords: computational fluid dynamics (cfd); journal bearing; kavitasi; performa tribology; viskositas pelumas
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Language : ID
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