Email:eric@shunyumachinery.com Yancheng Shunyu Agriculture Machinery Co.,Ltd

Yancheng Shunyu Agriculture Machinery Co.,Ltd

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Yancheng Shunyu Agriculture Machinery Co.,Ltd

Address:Wengang South Road 59#, Yancheng City, Jiangsu Province, China

Tel:+86-515-8860-7757

Fax:+86-515-8860-7757

Phone:+8618921887735

Email:eric@shunyumachinery.com

     

Causes And Hazards Of High Temperature Of Diesel Engine Oil

First, the friction and its form of diesel engine at work, the movement of the various parts of the contact with a very high rate of relative movement. Although the friction surface is fine after processing, it seems very smooth. However, if you take it under the magnifying glass to observe, you will find the surface there are still uneven phenomenon. These microscopic raised surfaces collide with each other, hindering the movement of the machine, there is a friction phenomenon. When two relatively in contact with the surface of the relative movement or relative movement, the contact between the surface to prevent the relative movement or relative movement of the phenomenon known as friction. Two relatively in contact with the surface in the relative movement, the material micro-particles to accelerate the movement, the internal energy increases, the macro will produce heat, which is friction heat.

The heat generated by the friction between the two objects can be calculated by the following formula: Q = f · s f = μK Q is the heat generated by friction, J f means the friction between two objects, N; s refers to the two objects The relative sliding distance, m; μ refers to the friction coefficient; K is the external pressure on the object, N. From the above formula, we can see that the heat generated by the friction between two objects is proportional to the friction coefficient and the relative movement distance (in the case of positive pressure). Therefore, the surface friction surface temperature and the following main factors: 1. The relative velocity of the friction surface. The faster the relative velocity of the friction surface, the higher the surface temperature; 2. Friction surface roughness. Friction surface more rough, the higher the friction surface temperature; 3. friction medium. Whether there is friction in the friction medium. Such as: lubricating oil or abrasive

Then to reduce the friction surface temperature, in the relative displacement and plus a positive pressure of the case, should try to reduce the friction coefficient. The theory and practice have proved that the friction surface is covered with a layer of lubricating oil, so that the formation of a metal film between the friction surface, can effectively reduce the friction surface temperature, slow down the wear and tear. According to the distribution of lubricating oil between the friction surface, friction can be divided into the following four categories: 1. Dry friction: friction between the surface of any lubricant generated by friction. Dry friction due to direct contact between metal and metal, and thus wear large, friction release more heat, power loss, which is in the diesel engine between the moving parts to avoid. 2. Liquid friction: friction caused by the friction surface is completely separated by the lubricant layer. Its friction coefficient is very low (0.001 ~ 0.005), can prevent wear and reduce power loss. This is between the various parts of the diesel engine to promote. 3. Boundary friction: The friction surface is separated by a thin film of the lubricant, but is not completely separated from the friction. When the boundary friction, if this layer of film with sufficient strength without rupture, you can avoid metal wear. But once the film damage will cause dry friction, serious wear and tear. 4. Semi-liquid friction and semi-dry friction: When the liquid friction and boundary friction or dry friction at the same time known as semi-liquid friction; dry friction and boundary friction is also known as semi-dry friction. They belong to mixed friction

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