Prof. Dr. Ertuğrul Durak
Journal bearing design criteria - VII Measuring oil film thickness
As stated in the previous articles, radial journal bearings have operating parameters sufficient to carry the bearing load between the journal (shaft) and the bearing surface. ...
Journal bearing design criteria - VI Oil flow in bearing and leak flow at bearing edges
Sufficient amount of oil should enter the bearing in order to form a hydrodynamic oil layer with the bearing operation parameters (such as speed, lead, oil viscosity, bearing ...
Journal bearing design criteria - V Bearing Width / Diameter (B/D) Ratio
In journal bearings, bearing width (length) / bearing diameter (B/D) ratio is an important parameter for determining the load carrying capacity of the bearing. Usually the bearing ...
Journal bearing design criteria IV - Bearing clearance
Elements that carry power transmission elements such as gear wheel, belt and pulley or chain wheel mechanisms are called shafts. Shafts that assume this carrying task are ...
Journal bearing design criteria III / Oil galleries
The main purpose of lubrication is to form an oil film between the two surfaces, which has sufficient thickness and is resistant to operating conditions. It aims to transform the ...
Journal bearing design criteria - II
Bearing selection and design processes can be summarized as: -Selecting the optimum bearing type, -Calculating bearing sizes that will ensure safety, -Reviewing the performance ...
Journal bearing design criteria - I
In general, design is a production process that aims to find a solution for a specific function. Several alternative solutions can be offered to solve the problem in design ...
Plant-oil-based lubricants - II
Technical terms such as biodegradable, bio-based, environment-friendly, recyclable, renewable, non-toxic, green, etc. are frequently used in the industry as well as in our daily ...
Lubricants and lubrication from mechanical engineering students’ perspective
Mechanical engineering is a field of engineering which studies, researches and provides training about the construction, manufacturing, manufacturing planning, assembly, ...
Plant-based lubricants - I
PETDER’s 2017 Sector Report reveals that 51 percent of the lubricant consumption in Turkey is composed of automotive lubricants, whereas 40 percent is industrial lubricants, ...
Hydraulic oils and oil additives
Hydraulic fluid selection is very important because today's hydraulic systems operate at harsh conditions consisting of high pressure, high temperature and high speed. An ...
2D nanomaterials as lubricant additives
Heat generation and distribution during friction can lead to a large amount of energy loss. Friction-related wear can lead to serious problems such as damage to surfaces, reduced ...
Additive types
Today, extensive research continues to achieve high performance in lubricants, because the properties of current lubricants in today's technology are still not perfect. Lubricant ...
Additive types 3
Detergent and dispersant additives: Detergent and dispersant additives are designed to control the carbon and oxidation, sludge, varnish, lacquer and other solid materials that ...
Additive types
Oxidation inhibitors: Oxidation reactions are exothermic and very complex reactions. Oxidation in lubricants that contain paraffinic and naphthenic hydrocarbons may lead to the ...
Additive types
Freezing Point Depressants (FPD): Hydrocarbons, which form the basis of lubricating oils, tend to solidify at low temperatures. Such additives are high molecular weight polymers. ...
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