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PENINGKATAN UMUR BEARING PADA POMPA CENTRIFUGAL DENGAN OPTIMASI PENGGUNAAN ANGULAR CONTACT BALL BEARING Dedi Wardianto
Menara Ilmu Vol 12, No 5 (2018): Vol. XII No. 5 April 2018
Publisher : LPPM Universitas Muhammadiyah Sumatera Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33559/mi.v12i5.778

Abstract

Pompa adalah suatu alat yang digunakan untuk memindahkan fluida dari tekananyang lebih rendah ke tekanan yang lebih tinggi dan/ atau posisi yang lebih rendahke posisi yang lebih tinggi. Salah satu jenis pompa yang banyak dipakai untukkebutuhan industri adalah pompa sentrifugal. Pada pompa centrifugal salah satukomponen yang penting adalah bearing sebagai penumpu poros untukmenggerakkan impeler pada pompa centrifugal. Akibat adanya gaya-gaya yangtimbul sebagai akibat dari putaran pada impeler pompa, timbul gaya aksial yangmenyebabkan bantalan/ bearing tipe 6305 mudah mengalami kerusakan. Olehsebab itu, digunakan bantalan/ bearing tipe 7305 BE sebagai pengganti bantalantipe 6305 yang sanggup menerima gaya-gaya aksial yang ditimbulkan akibatputaran pada poros impeler pompa. Dari hasil penelitian yang dilakukan dapatdiketahui bahwa Akibat putaran dari impeller maka timbul juga gaya aksialsehingga bearing tipe 6305 tidak dapat mengatasi gaya-gaya yang timbul tersebut.Penggunaan angular contact ball bearing tipe 7305 BE menggantikan deep grooveball bearing tipe 6305 pada pompa centrifugal produksi RRC tipe XA40/26 dapatmeningkatkan umur bearing hingga 200%.Kata kunci : pompa centrifugal, angular contact ball bearing, gaya aksial.
ANALISIS KENAIKAN TEMPERATUR OLI PELUMAS PADA BANTALAN PENYANGGA BAWAH (LOWER GUIDE BEARING) DI UNIT 4 PLTA SINGKARAK Dedi Wardianto
Menara Ilmu Vol 11, No 76 (2017): Vol. XI Jilid 1 No. 76, Juli 2017
Publisher : LPPM Universitas Muhammadiyah Sumatera Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33559/mi.v11i76.276

Abstract

Singkarak hydro power plant is one of the largest power generation to meet theelectricity needs of West Sumatra with a capacity of 175 MW with four units generatingmachine. Unit 4 Singkarak hydro power plant experiencing abnormalities of the lubricating oiltemperature in the lower guide bearing genarator resulting in decreased generation unitinstalled capacity of 10 MW and the changing patterns of operation and maintenance. Thisthesis aims to find the root of the problem that caused the rise lubricating oil temperature aswell as finding a solution fixes the problem. The method used to analyze using the tool RCFA(root cause failure analysis) which is an investigation process to determine the main causes ofa failure mode.From the analysis, we concluded that the formulation RCFA rise oil temparature oflower guide bearing oil due to low flow rate of lubricating oil resulting decline in maximumheat transfer is from 71 kW to 45.54 kW and due to the clearance between the bearing of theshaft does not correspond with the allowed values the manufacturer of the engine when viewedwith shaft deflection values that occurred in unit 4 Singkarak hydro power plant evidenced bythermal produced (Hg) greater value five-fold in the amount of 14.133 kW.Keywords: Lower guide bearing, Oli lubricants, Oil flow, Clearance bearings.
PEMBUATAN ALAT UJI RUGI-RUGIALIRAN DALAM PIPA SIRKULASI TERTUTUP DENGAN KEMIRINGAN 30 0 Dedi Wardianto
Menara Ilmu Vol 10, No 72 (2016): Jurnal Menara Ilmu November Jilid 1
Publisher : LPPM Universitas Muhammadiyah Sumatera Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33559/mi.v10i72.20

Abstract

Pratikum basic phenomena machinery required for S1 Mechanical Engineering, as a means toimprove the understanding of learning (psychomotor) on students. then try to make this finalanalysis tool flow losses in the circulation pipe covered with a slope of 30 0. To obtain avariation of the flow supplied pipe 1 inch, ¾ inch, ½ inch, 5/8 inch and valves with variousopenings. FWP 225 by using a pump capacity of 75 liters / min maximum pressure obtained 9kgf / cm², with a pressure gauge 4 kgf / cm² in the flow of 105 m / sec, which means the flowis turbulen.Berbagai variation of the flow rate as well as losses of pipes, fittings , knee,experiments can be done.Keywords : PVC pipes, pumps, flow variation, Losses flow.
Co-Authors Aliska Jalis Anrinal Marfizal Marfizal Marfizal Sufiyanto Sufiyanto Sufiyanto