Lubrication system is the key to all kinds of machinery and equipment, auto parts, one of the key points of maintenance is not into the impurities.
We usually pay attention to the dust, particulate impurities, water pollutants, often ignored the air.
Air does affect the performance of the lubricating oil, while oil inevitably contact with air, but in the lubricating oil mixed with air, such as oil cannot be released within the foam, the oil bubble, negative effect of lubrication.
In general, lubricating oil will be slow after contact with air oxidation (
Contact with oxygen)
, but the process is slow, also is inevitable, normal, but if the air to the interior of lubricating oil, the problem is big.
in the lubricating oil mixed with air there are three main types: air dissolved in the oil (
Invisible to the naked eye)
, suspension, trapped inside the oil cannot release the gas bubbles, oil bubble.
Among them, the machine is suspended, the most fatal and lubricating oils were stranded in the oil inside the bubble.
bubble would gather, floating on the oil surface, a relatively large volume, if there is a bubble, beware of oil inside often have bubbles typically form.
Bubble is suspended, trapped inside the oil, the volume is small, but great harm.
Air bubbles will cause the oil turbidity, if oil turbidity is not clear, can take the sample, if there is a hierarchical, so the lubricating oil pollution is turbid water or other liquids.
If let stand for a period of time, sample to restore clear, oil mixed with air bubbles.
the cause of the lubricating oil has bubbles in
many reasons will cause the bubble, the bubble in the oil increase, one of the most common is in the lubricating oil into the water.
When mixed with water in oil, can reduce the surface tension of the oil, could not form large bubbles float to the surface, but cracked into small bubbles is suspended in the oil inside.
pollution of lubricating oil: oil mixed with other fluids, detergents, solvents and other substances.
lube oil oxidation: oil oxidization caused the oil bubble resistance is reduced, some oil in the use of long after there will be a bubble increased, common reason is because the oil oxidation.
additive exhausted, anti-foam agent loss can cause bubbles increase, should pay attention to one point: antifoaming agent added more also can appear bubble problem.
Some users see bubble increased or the antifoaming agent is consumed, can add, anti-foam agent, anti-foam agent added more can cause bubbles.
leak: tubing, leak in areas such as the seal.
tank of poorly designed: the fuel tank is too small, no add the mesh of filtering bleb, baffle, back to the oil tubing and tubing is too close, the velocity of fast too late release of bubbles.
in the lubricating oil bubble, the bubble of the dangers of
bubbles and bubbles have harm on lubricating oil and machine, bubble will accelerate the oxidation of lubricating oil velocity, accelerate the consumption of additives, the oil film of heat, cannot form a complete, damage to equipment wear and tear.
Bubbles in high pressure system will cause the local high temperature, the oil rapidly metamorphism.
the harm of equipment:
easy to compress air, lubricating oil, there are gas, oil film thickness becomes thin and even oil film rupture and direct friction between mechanical components, causing wear and tear.
cause cavitation: bubble burst under pressure, cavitation damage on the metal surface formation.
impact mechanical operation: bubble will affect the stable operation of the mechanical system, such as hydraulic system will be unstable operation, action is out of control, corrosion, paint film is formed on the valve core jamming and so on.
when the bubble increased in the tank, how should handle?
the use of clean, dry, sampling from the discharge of oil bottle mouth take some sample, watch out whether there is water in the oil & ndash;
Free water or oil turbidity, layered, emulsifying pale.
If there is water, the bubble is likely to be caused in the lubricating oil into the water.
if it is not caused by moisture, and oil leak check point, if everything is normal, should make the oil for the oil sampling test, test whether polluted by other chemicals or oil, or additive consumption, oil metamorphism.
if the tank is poorly designed, can consider to increase the volume, in the oil tank and oil absorption add baffle, mesh.
warm prompt: to ensure the excellent mechanical lubrication, must avoid into any other material and oil in the lubricating oil, the oil should be clean, dry, free from any other material pollution.