RECENT DEVELOPMENTS IN AIR, LUBRICATING OIL, HYDRAULIC OIL AND FUEL OIL FILTRATION

1960 ◽  
Author(s):  
F. R. Gruner ◽  
H. L. Forman

2015 ◽  
Vol 75 (11) ◽  
Author(s):  
N. Nuraliza ◽  
S. Syahrullail ◽  
M.N. Musa

The use of vegetable oil-based lubricant as a lubricant in various applications has increased and it is eyed by the industry due to its superior tribological properties, besides possessing the potential to replace petroleum-based lubricants. Palm olein is one of alternative lubricants that could be suitable and attractive as a lubricant to be studied due to its advantages and large production in the country. Thus, in this study, the behavior of palm olein characteristics was investigated by using pin-on-disc experiment, in which a hemispherical pin was loaded against the rotating grooved disc. The experiments via sliding were performed with pin-on-disc tester using pure aluminum as the material for hemispherical pin and SKD11 for disc. The test was implemented by dropping continuous flow of palm olein as lubricating oil on sliding surface at different loads applied, which were 10N, 50N, and 100N. The wear rate of the pin and the friction coefficient were also investigated. Moreover, the surface roughness before and after the experiment was analyzed as well. All the results obtained were compared to hydraulic oil and engine oil-SAE 40. From the analysis, the friction coefficient acquired from lubricated with palm olein was the lowest for both conditions. The wear rate obtained for the three lubricants increased from 10N to 100N load for palm oil, but decreased for hydraulic and engine oil-SAE 40. Meanwhile, the wear rate obtained for lubrication with hydraulic oil showed the lowest value compared to Engine oil-SAE 40 and double fractionated palm olein. 





1935 ◽  
Vol 8 (3) ◽  
pp. 360-370 ◽  
Author(s):  
C. M. Cawley ◽  
J. G. King

Abstract Rubber is amenable to treatment by the process of hydrogenation-cracking at a pressure of 200 atmospheres of hydrogen and at temperatures above 360°. The rubber is suitably treated in a continuous plant in the form of a solution containing 50% of rubber and 50% of an oil boiling above 200° obtained by the hydrogenation of rubber. At a reaction temperature of 450–480°, and in the presence of a molybdenum catalyst, a high yield of spirit (boiling up to 200°) is obtained. In one passage of the raw material over the catalyst the yield is from 40 to 60% by weight of the rubber solution, the remainder being oil (53 to 18%) and gaseous hydrocarbons. The crude product is a pale yellow mobile oil, and the fraction boiling below 200° a water-clear spirit. The latter contains aromatic 15, unsaturated 1.5, and saturated hydrocarbons 83.5%. It therefore requires only very little refining to make it stable on storage. As the reaction temperature is lowered, the yield of spirit decreases, while that of high-boiling oil increases. The high-boiling oil also becomes more viscous. Thus at 370° the yields, as percentages by weight of the rubber solution, are: spirit boiling up to 200° 10.6%, and oil boiling above 200° 87.6%. The latter is distilled to produce 46.7% of Diesel oil, 21.5% of lubricating oil, and 19.4% of residue. The greater part of the Diesel oil and the high-boiling residue is required to prepare rubber solution for use as the raw material. Rubber can therefore be treated by a hydrogenation-cracking process to yield either motor spirit alone or motor spirit, fuel oil, and lubricating oil, depending on the temperature of treatment. As a commercial project the rubber treated would require to be surplus production available to the process at a much lower cost than that of rubber purchased in the normal market.





2013 ◽  
Vol 66 (1) ◽  
Author(s):  
Syahrullail Samion ◽  
Mohd Izhan Ibrahim ◽  
Nor Azwadi Che Sidik ◽  
Mohammad Nazri Mohd Jaafar

The wear mechanism of titanium alloy lubricated with fixed amount of palm olein was investigated using modified pin-on-disk tester. Titanium alloy has high strength-to-weight ratio and excellent mechanical properties such as superb corrosion resistance. This make titanium alloy was chosen for the critical or high temperature/pressure application such as turbine engine parts. Palm oil was chosen for the development of bio-lubricant to replace or minimize the usage mineral oil base lubricant. Palm oil is a vegetable oil which is non-toxic to human and has high decomposition rate. These factors give advantages to palm oil to be produce as an industrial lubricant. The experimental works were performed using a pin-on-disk tribotester, using titanium as the material for both flat ended pin and grooved disk. The test were implemented by dripping 5ml of RBD palm olein as a lubricating oil on the sliding surface at constant speed, which was 0.5m/s using different loads, which were 5N, 20N, 40N and 80N. In this study, the wear rate of the pin and friction coefficient were investigated. The weight loss and surface roughness before and after experiment were analyzed. All the results obtained were compared to commercial hydraulic oil and additive-free paraffinic mineral oil. From the analysis, the friction coefficient acquired with lubrication of RBD palm olein was the lowest compared to commercial hydraulic oil and additive-free paraffinic mineral oil at all loads applied. It could be concluded that RBD palm olein has good lubricity performance and has the capability to be developed as a lubricant. 



1977 ◽  
Vol 191 (1) ◽  
pp. 161-167 ◽  
Author(s):  
G. Goodwin ◽  
R. Holmes

Measurements of bearing surface temperature were made in a large end bearing of a marine diesel engine, the data being communicated by a mechanical linkage attached to the connecting rod. The engine was run with the lubricating oil heavily diluted with fuel oil, and also with a variety of load conditions on the test cylinder. Some observations were made immediately after a rapid start in order to assess the effects of priming of the lubrication system. The observations are discussed and some qualitative conclusions drawn.



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