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Dedy Masnur
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proksima@ejournal.unri.ac.id
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Jurusan Teknik Mesin Fakultas Teknik Universitas Riau Jl Soebrantas km 12,5 Simpang Baru Pekanbaru 28293 Riau - Indonesia
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Kota pekanbaru,
Riau
INDONESIA
Proksima
Published by Universitas Riau
ISSN : -     EISSN : 29885841     DOI : https://doi.org/10.31258
Core Subject : Engineering,
Mechanical Engineering
Jurnal Proksima adalah jurnal ilmiah yang mempublikasi artikel orisinal dan memiliki keterbaruan sebagai kontribusi menambah pemahaman tentang dasar-dasar ilmu rekayasa dan pengaplikasiannya terutama dalam bidang ilmu Teknik Mesin. Publikasi ini diharapkan menjadi solusi dari tantangan dan permasalahan di dunia penelitian dan industry. Isi dari artikel mencakup bidang: Konstruksi: Desain konstruksi, Dinamika kendaraan, Getaran Mekanik, Kontak mekanik dan tribologi Produksi: Design Manufacture, Optimasi Sistem Produksi, Perencanaan Produksi dan Pengendalian Persediaan, Computer-Integrated Manufacturing System, Sustainable Product Design and Manufacturing. Konversi Energi: Energi terbarukan, pengkondisian udara, pembangkit, analisis energi dan exergy, motor bakar, mekanika fluida Material: Teknologi pengecoran dan pembekuan logam. korosi dan pencegahannya, perlakuan permukaan, metallurgy serbuk, karakterisasi material, material baru, fatik, komposit, metallurgi pengelasan, pemrosessan material, komputasi dan pemodelan.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 24 Documents
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Bearing Failure Analysis in Centrifugal Pump at PT. XYZ Fradana, Erwin; Abdurrahman, Ridwan
Proksima Vol 2 No 1 (2024): Jurnal ProKsima
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/proksima.v2i1.20

Abstract

This study conducts a comprehensive analysis of bearing failures in centrifugal pumps, aiming to find bearing life & the cause of difference in field data. Through meticulous examination of failed bearings, the research identifies root causes, including factors such as misalignment, inadequate lubrication, and excessive loads. The investigation involves a series of systematic steps to identify, evaluate, and understand the causes and impacts of damage that occurs. First, a visual survey of the centrifugal pump is carried out to look for physical signs that indicate damage to the bearing. This involves checking general conditions, such as wear, cracks, or leaks. The findings contribute to the nominal bearing life is 26.631,8 hours or about 3 years of use & the difference in life calculations between theoretical calculations and data found in the field is generally caused by high temperatures and vibrations in the bearing.
Kinematic Analysis of the Draglink Mechanism Using the Newton Rhapson Iteration Method Nazaruddin, Nazaruddin; Huda, Fablil; Syuhada, Ryan
Proksima Vol 2 No 1 (2024): Jurnal ProKsima
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/proksima.v2i1.21

Abstract

Position, speed, and acceleration analysis are all included in kinematic analysis. Vectors of location, velocity, and acceleration can be expressed analytically in the form of complex numbers using the Newton Rhapson Iteration Method. The location vector of the point to be investigated must be found first, and then the acceleration and velocity vectors must be found by differentiating against time. This study analyzes the relationship between the θ1 value and the θ2, θ3, θ4, θ5, and x2 values in a drag-link mechanism. The Newton-Raphson iteration method is employed for kinematic analysis to solve nonlinear equations. In this research, the analysis results indicate a correlation between the θ1 value and the θ2, θ3, θ4, θ5, and x2 values. As θ1 increases, the θ2, θ3, θ4, and θ5 values also proportionally increase. The x2 value is also influenced by changes in θ1. This study combines the Newton-Raphson iteration method with graphical analysis using CAD software. The conclusion of this research highlights a significant relationship between the θ1 value and the θ2, θ3, θ4, θ5, and x2 values in the drag-link mechanism. The analysis provides valuable insights for modeling, designing, or controlling systems involving these variables.
Effect of Slip-to-Roll Ratio on Wear Rate and Friction Coefficient of Palm Oil-Base Biolubricant with Additive of Graphene Cupu, Dedi Rosa Putra; Adji, Aryo Kuncoro; Anuar, Kaspul; Afrizal, Efi; Nazaruddin
Proksima Vol 2 No 1 (2024): Jurnal ProKsima
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/proksima.v2i1.23

Abstract

During machine is in operation, some machine elements will contact causing a rubbing between the elements. When the contacting parts is subjected to a mechanical force, a phenomenon called friction and wear arise. Contacting of both elements with the same tangential velocity refers to pure rolling contact which means there is no slip between them. Lubricants are usually used between the contacting materials to reduce friction and wear. Nowadays, commercial lubricants are from mineral oils which are dangerous to human beings and the environment. An alternative to reduce the use of mineral oil is by using vegetable-based oils. This research was experimentally conducted to study the effect of slip-to-roll ratio (SRR) on the wear rate and coefficient of friction for biolubricant made of palm oil and graphene nanolayers as additives using disc-on-disc tribometer. The experimental results show that the value of the wear rate and friction coefficient is directly proportional to the value of the slip ratio on the two discs. This means that the greater the slip ratio that occurs, the greater the value of the wear rate and friction coefficient produced.
An Investigation of Thrust Bearing Temperature Rise in Unit 2 Koto Panjang Hydropower Plant Muttaqien, Muhammad Fadhlurrahman ‘Arif; Patiharauw, Frans Boyce; Masnur, Dedy
Proksima Vol 2 No 1 (2024): Jurnal ProKsima
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/proksima.v2i1.24

Abstract

Turbines and generators are the main components of hydropower plants that are supported by several bearings, one of them is the thrust bearing. Thrust bearing unit 2 experienced a temperature rise that exceeded the alarm limit (77℃). This study aims to investigate the temperature rise and provide a solution. The investigation was conducted by visual observation; collating temperature and oil flow rate data; and reviewing the hydropower design. The results showed that the temperature rise was attributed to air (oil vapor) trapped in the lubricant circulation system. Therefore, the lubricant circulation system was modified by adding a pipe to the stayring as an outlet for trapped lubricant vapor. This measure effectively normalized the thrust-bearing temperature and flow rate.

Page 3 of 3 | Total Record : 24

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