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Dedi Wardianto
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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.
Comparison of Propeller Turbine Performance Using Airfoil Blades and Without Airfoil Marfizal Marfizal; Dedi Wardianto; Sufiyanto Sufiyanto
Jurnal Teknik Mesin Vol 12 No 1 (2022): Jurnal Teknik Mesin Vol.12 No.1 April 2022
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2022.v12.i1.11-16

Abstract

Electricity is a strategic energy resource and is very important for the livelihood of many people. The government has tried to free Indonesia from the electricity crisis and is trying to find alternative uses of new and renewable energy (EBT). The government has committed that NRE will continue to be developed to ensure energy security in Indonesia and meet the growing demand for electricity. The government has set a target of 23% share of clean energy in the national energy mix in 2025 and 31% in 2030 through the National Energy Policy (KEN) and the General National Energy Plan (RUEN). To succeed the government program is to take advantage of the potential energy sources that exist around people's residences. However, one of the obstacles is the remote location so that access is difficult. In addition, the village community lacks knowledge about microhydro technology. Therefore it is necessary to design a turbine that is not complicated to manufacture. The complexity is in the manufacture of turbine blades which must be aerodynamic and affect performance. Therefore, it is necessary to do research on turbine blades that are not aerodynamic and how they perform. This research was conducted experimentally using a propeller turbine and tested on 3 different types of blades, namely, in this study three types of blades were created and designed. The aerodynamic cross-section blade and the square cross-section blade with a thickness of 3 mm without curvature, the blade with a rectangular cross-sectionsquare with a thickness of 2 mm with curvature (camber). which is made of steel plate manufacture by welding. The turbine blade diameter used is 150 mm with a total of 4 blades.
Failure Analysis of the Screw Press Machine Dedi Wardianto; Anrinal
Jurnal Teknik Mesin Vol 12 No 1 (2022): Jurnal Teknik Mesin Vol.12 No.1 April 2022
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2022.v12.i1.72-81

Abstract

In this paper, an analysis of the mechanical components of the Screw Press Machine is carried out in the form of an analysis of the design of mechanical components, maintenance cycles and remaining life. From the design analysis of mechanical components, it is known that the stresses that occur in the screw are in the form of nominal shear stresses of 18.18 N/mm², axial stresses of -10.41 N/mm², bending stresses of 54.66 N/mm², and shear stresses acting on the base screw of 65.41 N/mm². The number of press cycles that occur in one hour is 121 cycles. Number in the press cycle that occurs in the worm screw press is 2.625x105 cycles. In field conditions with pressure fluctuating between 30-40 bars, the life time of using a worm screw press is around 2169.43 hours.
The Effect of Camshaft Racing on Matic Motorcycle Performance Marfizal; Dedi Wardianto; Aliska Jalis
Jurnal Teknik Mesin Vol 12 No 2 (2022): Jurnal Teknik Mesin Vol.12 No.2 October 2022
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2022.v12.i2.98-103

Abstract

The research conducted in this paper is related to the Effect of Camshaft Racing on Motor Matic Performance. For Performance Testing such as power, torque, engine speed, acceleration at engine speed of 6000 to 9000 rpm. Performance testing using a dyno test tool type Super Dyno 50L. The results of this test are used to compare the performance of an automatic motorcycle using a standard camshaft (STD) and a Racing camshaft (BRT). From this study it was found that the performance for the Racing camshaft (BRT) increased compared to the standard camshaft performance (STD), the acceleration value was 6.2% to 4.5%, speed 1.0% to 0.6%, power 9.0% to 4.5%. 16.2%, torque 6.1% to 2.9%. In general, it can be said that camshaft Racing (BRT) has better performance.
Effect Of Electric Load On Steam Flow Rate At Steam Turbine As Generator Dedi Wardianto; Marfizal; Sufiyanto
Jurnal Teknik Mesin Vol 12 No 2 (2022): Jurnal Teknik Mesin Vol.12 No.2 October 2022
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2022.v12.i2.104-109

Abstract

PT. Kurnia Batang Hari is a palm oil processing factory into palm oil. At PT KBHB there is a tool called “Steam Turbine Generator Type RB5” which functions as a power generator. This study aims to determine the effect of the load on the mass flow rate, turbine generator power, and determine the efficiency of the steam turbine generator. The research method is to take boiler and turbine data directly for 1 week. Get the enthalpy value from the steam table and can calculate based on the research objective. Based on the research conducted, it was found that the highest average flow rate on Wednesday was 3.48 kg/s. The highest generator power yield on Sunday is 1661 KW. The results of the calculation of the highest average generator efficiency on Sundays are 57.11%. Conclusion It can be seen that if the load on the turbine is getting bigger, then the mass flow rate of the steam will be even bigger and it also depends on the pressure of the steam entering and leaving the turbine. The average load of 1 week borne by the generator is 885 KW and the mass flow rate is 3.81 kg/s. The generator power produced during processing is an average of 1 week, which is 1600 KW. The average efficiency of the generator in 1 week is 55.52% on Sunday.
Co-Authors Aliska Jalis Anrinal Marfizal Marfizal Marfizal Sufiyanto Sufiyanto Sufiyanto