DESAIN ELASTOHYDRODINAMIS LUBRICATION SYSTEM DENGAN PENGATUR TEKANAN PADA CAMSHAFT MOTOR BENSIN 4 LANGKAH

2017 ◽  
Vol 8 (2) ◽  
pp. 773
Author(s):  
Nana Supriyana ◽  
Mastur Mastur
Keyword(s):  
Lubrication System

Camshaft didesain dengan beberapa pertimbangan seperti durasi bukaan katup, tinggi angkat katup, jarak titik puncak antara cam lobe intake  dan cam lobe exhaust, dengan cara kerja berputar, tertekan dan bergesekan akan menimbulkan hal yang tidak bisa dihindarkan yaitu terjadinya proses keausan permukaan yang bergesekan yang berdampak perubahan pada waktu pemasukan campuran bahan bakar dengan udara dan pengeluaran sisa pembakaran yang pada akhirnya berpengaruh terhadap kemampuan kerja motor secara keseluruhan. Penelitian ini dilakukan untuk mengamati fenomena keausan yang terjadi pada komponen camshaft dengan cara membuat desain sistem pelumasan (elastohydrodinamic lubrication system) untuk mencapai kondisi elastohidrodinamis selalu terjadi walaupun diawal bergeraknya komponen camshaft pada motor bensin sehingga keausan permukaan camshaft dapat diminimalisir dan kemampuan kerja motor tetap terjaga. Metode penelitian menggunakan media motor bensin 4 langkah dengan mekanisme katup jenis single over head camshaft (SOHC), kecepatan putar camshaft 2000 Rpm, temperatur kerja 78o C serta menggunakan minyak pelumas SAE 10W-40. Hasil penelitian didapatkan bahwa sistem pelumasan modifikasi dengan penambahan dua buah katup pengatur minyak pelumas pada komponen camshaft menunjukan kekasaran intake cam lobe sebesar 0,316µm dan kekasaran exhaust cam lobe sebesar 0,343µm mempunyai nilai kekasaran lebih rendah dibandingkan dengan sistem pelumasan standar menghasilkan nilai kekasaran sebesar 0,639µm untuk intake cam lobe dan 0,433µm untuk exhaust cam lobe. Hal ini membuktikan bahwa dengan modifikasi desain dengan penambahan sebuah katup pengatur minyak pelumas dapat meminimalisir atau mengurangi resiko keausan camshaft.

Choice and Exchange of Lubricating Oil for Injection Molding Machine

2019 ◽  
Vol 12 (4) ◽  
pp. 378-382
Author(s):  
Shan Syedhidayat ◽  
Quan Wang ◽  
Al-Hadad M.A.A. Mohsen ◽  
Jinrong Wang
Keyword(s):  
Injection Molding ◽  
Dimensional Accuracy ◽  
Low Noise ◽  
Working Environment ◽  
Lubricating Oil ◽  
Lubrication System ◽  
Molding Machine ◽  
Oil And Grease ◽  
Injection Molding Machine ◽  
The Stability

Background: One of the most common manufacturing equipment for polymer product is injection molding machine. In order to ensure the precise, stable and continuous operation of the injection molding machine, the maintenance of the lubrication system must be done well. The stability, reliability, rationality and low noise performance of the lubrication system of injection molding machine directly affect the quality of injection products, dimensional accuracy, molding cycle, working environment and maintenance. Objective: The purpose of this study is to introduce the methods of choice, maintenance of lubricating oil for injection molding machine from many literatures and patents in the recent years, such as lubricating oil device, lubricating composite and structure. Methods: An example of the 260M5 automatic injection molding machine is introduced for the inspection and maintenance of the lubrication system including lubricating oil and lubricating grease. Results: To ensure the lubrication of the injection molding machine, it needs to strictly observe the lubrication time and modulus of the injection molding machine. It needs to strictly control the temperature rise of the lubricating oil and select the correct lubricating oil and grease to ensure the lubrication quality. Conclusion: In the operation of the injection molding machine, it is necessary to check that the lubricating oil is sufficient and the lubricating points are working properly. It ensures sufficient lubrication of the injection molding machine and strictly observes the lubrication time and modulus of the injection molding machine. The stored lubricating oil should be sealed well to prevent air pollution.

scholarly journals Enzymatic identification of the load-bearing boundary lubricant in the joint.

Rheumatology ◽  
1998 ◽  
Vol 37 (2) ◽  
pp. 137-142 ◽  
Author(s):  
B A Hills ◽  
M K Monds
Keyword(s):  
Water Soluble ◽  
Surprising Result ◽  
Lubrication System ◽  
Load Bearing ◽  
Bovine Articular Cartilage ◽  
Boundary Lubricant ◽  
Surface Active ◽  
Per Se ◽  
Dose Dependent ◽  
Wear Tests

Abstract Bovine articular cartilage and synovial fluid (SF) were co-incubated with one of three enzymes selected to destroy each of the three major contenders for the active ingredient imparting such remarkable load-bearing lubrication to the normal joint. Destroying hyaluronic acid (HA), alias hyaluronan, with hyaluronidase, both frictional and wear tests displayed no significant change in accordance with most previous studies of SF alone. Destroying surface-active phospholipid (SAPL) with phospholipase A2, there was a highly significant dose-dependent compromise of lubrication as recorded on both tests. Trypsin produced a somewhat surprising result in that lubrication of the cartilage actually improved. This result can be interpreted as indicating that lubricin is not the lubricant per se, but, as a water-soluble, macromolecular, proteinaceous carrier for phospholipid, its destruction caused more SAPL to be deposited as the true load-bearing lubricant. These results are discussed in the context that SAPL, lubricin and HA each have specific roles in a comprehensive lubrication system.

Pumpless Lubrication System: A New Concept to Reduce Emission from 2-stroke Engined Vehicles

2001 ◽  
Author(s):  
V. Tandon ◽  
K.P. Kavthekar ◽  
S.D. Rairikar ◽  
M.K. Chaudhari
Keyword(s):  
Lubrication System ◽  
System A

A model for optimum filtration of a lubrication system

Wear ◽  
1986 ◽  
Vol 111 (1) ◽  
pp. 73-82
Author(s):  
John A. Tichy
Keyword(s):  
Lubrication System ◽  
Optimum Filtration

A Robust Lubrication System Using an Ionic Liquid Polymer Brush

2015 ◽  
Vol 2 (15) ◽  
pp. 1500187 ◽  
Author(s):  
Hiroyuki Arafune ◽  
Toshio Kamijo ◽  
Takashi Morinaga ◽  
Saika Honma ◽  
Takaya Sato ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Polymer Brush ◽  
Lubrication System ◽  
Liquid Polymer ◽  
Ionic Liquid Polymer

Overview of engine oil replacement technologies in internal combustion engines of agricultural machinery

2020 ◽  
pp. 10-16
Author(s):  
S.A. Belov ◽  
I.V. Busin
Keyword(s):  
Economic Efficiency ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
The State ◽  
Engine Oil ◽  
Combustion Engines ◽  
Lubrication System ◽  
Agricultural Machinery ◽  
High Quality

The article reviews four existing technologies for replacing engine oil and a method for determining its suitability for improving economic efficiency. It is established that the oil is replaced according to the need in accordance with the defect indicators. This technology of oil condition is characterized by a more complete use of its resource. The frequency of replacement is determined by the indicators of condition, which is monitored by special sensors built into the engine lubrication system. However, the difficulty of using this technology is due to the lack of high-quality devices for monitoring the state of running engine oil in the engine.

MATHEMATICAL MODEL OF DIESEL LOCOMOTIVE LUBRICATION SYSTEM

2020 ◽  
pp. 64-80
Author(s):  
Michail Vladimirovich Fedotov ◽  
Vladimir Vasilievich Grachev ◽  
Aleksandr Vasilievich Grischenko ◽  
Viktor Aleksandrovich Kruchek ◽  
Aleksey Mitrofanovich Budjukin ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Lubrication System ◽  
Diesel Locomotive

The tribological performance of W-DLC in solid–liquid lubrication system addivated with Cu nanoparticles

2021 ◽  
Author(s):  
Dong shan Li ◽  
Ning Kong ◽  
Ruishan Li ◽  
Boyang Zhang ◽  
Yongshun Zhang ◽  
...  
Keyword(s):  
Test Temperature ◽  
Applied Load ◽  
Tribological Performance ◽  
Dominant Factor ◽  
Lubrication System ◽  
Cu Nanoparticles ◽  
Friction Test ◽  
Dlc Film ◽  
Test Conditions ◽  
Solid Liquid

Abstract Judicious selection of additives having chemical and physical compatibility with the DLC films may help improving the triboligical properties and durability life of DLC-oil composite lubrication systems. In this study, Cu nanoparticles were added to PAO6 base oil to compose a solid-liquid composite lubrication system with W-DLC film. The effects of nanoparticle concentration, test temperature and applied load on tribological performance were systematically studied by a ball-on-disk friction test system. The tribological results illustrated that Cu nanoparticles could lower the coefficient of friction (COF) and dramatically reduce the wear rates of W-DLC films. The optimal tribological behavior was achieved for the 0.1 wt.% concentration under 30 ℃ and the applied load of 100 N. The test temperature and applied load were vital influencing factors of the solid–liquid lubrication system. The bearing effect and soft colloidal abrasive film of spherical Cu nanoparticle contributed to the excellent tribological performance of the composite lubrication system under mild test conditions, meanwhile, the local delamination of W-DLC film and oxidation were the main causes of the friction failure under harsh test conditions. With test temperature and applied loads increase the degree of graphitization of the W-DLC film increased. In conclusion, there are several pivotal factors affecting the tribological performance of solid–liquid lubrication systems, including the number of nanoparticles between rubbing contact area, graphitization of the worn W-DLC films, tribofilms on the worn ball specimens and oxidation formed in friction test, and the dominant factor is determined by the testing condition.

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