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Effects and properties of lubricants
BBT Nôi dung máy nén khí
Date posted: 08/06/2016
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viscosity plays an important role in the properties of engine oils.
If assessed according to the SAE viscosity oil with the letter "W" is the kind of multi-level, used in all seasons.
When classified according to API features, the characters after the "S" or "C" with the larger order of the alphabet as possible.
Changing the oil is one of the routines required for most people traveling by car , motorbike.
However, not all of them fully understanding the features, as well as recording parameters on this product.
Typically the letter "W" in the SEA 10w40 symbols inscribed on the lubricants commonly thought "Weight", when in fact it is used, so that only the "Winter".
The effects and properties of lubricants
in the engine, lubricants have many effects such as reducing the friction between the two parts in direct contact with each other, cooling cooling, sealing, corrosion resistance.
However, its effects are still Cobalt Friction reduction should target viscosity is the most important influence on the quality of a commercial lubricant product.
The viscosity of oil changes with temperature.
When the high temperature, the viscosity decreases and vice versa.
Oil low viscosity easy to move than higher viscosity oil.
Also, due to significant
amounts of molecules that make up the lubricant directly related to its viscosity so it is often called a heavy oil or light oil.
Refers to the type of light oil with low viscosity, heavy oil and high viscosity oil only.
In fact, easy to pump and light oil circulated through the engine faster.
In contrast, heavy oil is often highly viscous, should move slower but higher-pressure oil flow through the lower pump.
Classification according to viscosity lubricants
classification method in accordance with the viscosity, the manufacturer oil production using a uniform
classification of the American Society of Automotive engineers SAE (Society of Automotive engineers).
The SAE classification depending on oil products that are single-level or multi-level.
Multi-viscosity oil correspond in many different temperature conditions of oil remaining in the single-level meets only a
SAE classification system is quite complex, it involves many different concepts.
However, can point out the main factors.
For multi-level oil, after the acronym SAE 5W tonhu money, 10W or 15W, 20W.
The number preceding the "W" refers to the temperature range where the engine oil which has a viscosity enough to start the car and sometimes cold.
To determine thermal dokhoi under this character, you just take 30 minus the number of negative temperatures, but under.
For example, 10W oil will start at minus 20 degrees Celsius good, good boots 15W oil at minus 15 degrees C.
The engine oils in the welding zone countries are usually 5W, 10W, 15W, but the majority of the product Vietnam in 15W or 20W only kind.
Although no significant startup because the weather in Vietnam is often not too cold, but to achieve the required cold start, manufacturers must add oil additives should have some more
small the more expensive.
15W and 20W types with the average price should be imported lubricants manufacturers or produced in Vietnam.
Preceded by the letters "W" in the multi-level oils can be letters of 40, 50 or 60. This is the character used
in only about 100 degrees Celsius viscosity of lubricating oils.
Usually, the bigger the number the greater the viscosity and vice versa.
For example, the car is not too extreme activities like
Screw air compressor
Compressors use circular motion of screw, use Puli is connected to the screw 02 presses air into the small volume hon.Chung used in the industrial production sector, be it fixed or mobile type dynamic.
This is the most important equipment for compressed air system (it is considered as the heart, system), because Compressors Direct to produce compressed air supply to the devices and locations in need using compressed air.
Some solutions to save energy
First thing to note for the compressed air system pressure drop pressure loss is a phenomenon that reduces the pressure from the air compressor to use protection.
How to rationalize pressure compressor
After the survey, experts ECC made solutions. Separating the spray using compressed air (10%) and the compressed air supply for the actuators (10%) with compressed air for the furnace section pasteurized (80%) according to the following options
Situation usual air compressor system
For many industries, compressed air supply system has an important role, system This system typically consumes considerable energy.
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