What to do with spoiled industrial lubricants 20

<> "The Cause of Spoilage.

1. The lubricating oil is heated and oxidized, so that the lubricating oil generates gum and carbon slag;

2. Mechanical impurities such as lime sand in the middle of the air movement, metal chips worn by the machine parts and carbon slag after combustion are mixed into the lubricating oil;

3. A part of the combustion products are combined with the condensate in the cylinder to form acidic substances mixed into the lubricating oil, which has a corrosive effect on metal parts;

4. Due to incomplete combustion or poor ventilation of the crankcase or poor sealing of the cylinder gasket, the coolant is mixed with lubricating oil, which significantly reduces the viscosity of the lubricating oil and loses its lubricating performance.

Discriminant methods. 1. Observe the oil film on the dipstick, if the oil film is yellow or brown, the oil dipstick mark is clearly visible, indicating that the oil quality is good.

2. When the engine is hot, pull out the dipstick, if you find that there are blisters in the oil, find water droplets on the lubricating oil port cover, or take out a little lubricating oil to heat, there is a crackling sound, which proves that the lubricating oil contains water and should be heated and dehydrated.

3. Drop the inspected lubricating oil on the white filter paper, compare the oil stains with the standard oil stains, and judge the deterioration of the lubricating oil. If gels and impurities are deposited on the filter paper, the lubricating oil is too dirty.

4. Slowly pour out the lubricating oil that needs to be checked from the container and observe the color and transparency of the flowing oil, identify whether the lubricating oil is turbid, and the oil flow can be kept slender and uniform, indicating that there are no gelatinous substances and impurities in the lubricating oil.

Measures to delay deterioration.

1. Prevent lubricating oil from leaking up and down. When the piston ring is seriously worn or installed incorrectly, the valve stem oil seal is damaged, etc., it should be overhauled in time to maintain a good sealing effect, and at the same time, it is necessary to prevent combustion gas from leaking into the crankcase.

2. Pay attention to ventilation and heat dissipation. The temperature of the lubricating oil should not be too high and should be kept at 70 80. For this purpose, the crankcase ventilation should be kept well.

For cars equipped with oil radiators, the oil radiator switch should be turned on when the air belt temperature is above 20 or when driving at low speed under heavy load.

3. Do a good job of cleaning the "three passes". Prevent dirt and impurities from entering the lubricating oil; Keep the filter clean; Cover tightly with lubricating oil port. Replace the engine oil regularly as required and clean the lubricating oil duct thoroughly.

After the lubricating oil is used for a period of time, the lubricating oil deteriorates due to the pollution of mechanical impurities and dust from the outside world, the metal chips worn by the running parts and the metal salts formed by the erosion of the parts. After the lubricating oil deteriorates, it is dark black, foamy and has emulsified, grinding with fingers, no viscousity, astringency or peculiar smell, dark brown on the white test paper, no yellow infiltration area or many black spots.

If it is not replaced in time, it will accelerate the wear and tear of the parts and components, affect the service life, and even cause safety accidents, so it is particularly important to check whether the lubricating oil has deteriorated and replace it in time.

Several simple identification methods are described as follows:

1. Oil flow observation method.

Take two measuring cups, one of which holds the lubricating oil to be checked, and the other is empty on the tabletop, lift the measuring cup full of lubricating oil 30 40 cm away from the table and tilt, let the lubricating oil slowly flow into the empty cup to let the hunger, observe its flow, the lubricating oil flow should be slender, even, continuous, if the oil flow is fast and slow, and sometimes there are large pieces of flow, it is said that the lubricating oil has deteriorated.

2. Hand twisting method.

Twist the lubricating oil between the thumb and index finger and grind repeatedly, the better lubricating oil feels lubricated, less abrasive debris, no friction, if you feel the sand between the fingers and other greater friction, it indicates that there are many impurities in the lubricating oil, can no longer be used, should be replaced with new lubricating oil.

3. Illumination method.

On a sunny day, use a screwdriver to lift the lube tank cap at a 45-degree angle to the horizontal tara face.

Compare the sunlight, observe the oil droplets, under the light, you can clearly see that the lubricating oil has no abrasive debris as good, and it can continue to work, if there is too much abrasive debris, the lubricating oil should be replaced.

4. Oil drop trace method.

Take a clean white filter test paper, drop a few drops of oil on the filter test paper, after the lubricating oil leaks, if there is black powder on the surface, there is a sense of astringency when touched by hand, it means that there are a lot of impurities in the lubricating oil, good lubricating oil has no powder, dry and smooth to the touch of the hand, and yellow traces.

Not only pay attention to these things, but also identify whether the oil can be used, viscosity, impurities, moisture, color, acidity and value are all considered.

Deterioration of machine tool lubricants is caused by a variety of factors, including service life, storage conditions, working environment, etc.

In order to prevent the deterioration of machine tool lubricating oil, you can start from the following aspects:

1.Replace the lubricating oil regularly: The service life of the machine tool lubricant has a certain time limit, so it needs to be replaced regularly. Different brands and models of lubricating oil have different service life, and the specific replacement cycle should be determined according to the manufacturer's requirements and usage.

2.Storage conditions: Machine tool lubricating oil should be stored in a dry, ventilated and cool place, avoiding direct sunlight and high temperatures. During storage, contact with moisture and corrosive gases should be avoided to avoid chemical reactions that may lead to deterioration.

3.Working environment: Machine tool lubricating oil will be affected by the vibration, high temperature, pollution and other factors of the machine tool itself when working, so it needs to be paid attention to the working environment.

The machine should be kept clean, and the oil pool and oil circuit should be cleaned regularly to prevent contaminants from entering the lubrication system and causing the lubricating oil to deteriorate.

4.Lubricant quality: Choosing a high-quality machine tool lubricant is the key to preventing lubricant deterioration. Choose lubricants with good aging resistance, high temperature stability and rust resistance.

In short, the deterioration of the lubricating oil of the machine tool needs to be considered comprehensively, not only to pay attention to the quality of the lubricating oil itself, but also to pay attention to the details of storage and use conditions. Only by taking it all together can we better protect the normal operation of the lubrication system of the machine tool.

1.When the fuel is mixed with the oil, the viscosity of the oil is affected, resulting in low oil pressure, and in severe cases, wear and tear and even mechanical failure.

2.Smell of fuel in the oil.

3.The viscosity of the oil decreases and becomes thinner.

Cooling water Antifreeze leakage, fuel leakage mixed with engine oil will cause the oil level to rise, in addition to sensory judgment, the most accurate method is through oil detection. Through oil testing, you can accurately analyze what substances are mixed in the oil, whether there is wear or failure in the engine, find the most accurate oil change time, and determine the most accurate oil change time.

1. Oil droplet trace method: take a clean white filter test paper, drop a few drops of lubricating oil on the filter test paper, after the lubricating oil leaks, if there is black powder on the surface, there is a sense of astringency when touched by hand, it means that there are many impurities in the lubricating oil. A good lubricant is powder-free, dry and smooth to the touch of the hand, and has yellow marks.

2. Oil flow observation method: take two measuring cups, one of which is simply burning the lubricating oil to be checked, and the other empty cup is placed on the table, and the measuring cup full of lubricating oil is raised 30-40cm away from the desktop and tilted, so that the lubricating oil does not flow slowly into the empty cup, and the flow is observed.

3. Lighting method: On a sunny day, use a lubricating oil inspection rod to lift it up at an angle of 450 with the horizontal plane. According to the sunlight, observe the oil droplets of the lubricating oil, under the light, you can clearly see that there is no abrasive debris in the lubricating oil is good, you can continue to use, if there is too much abrasive debris, you should replace the new oil.

4. Oil droplet trace method: take a clean white filter test paper, drop a few drops of lubricating oil on the filter test paper, after the lubricating oil leaks, if there is black powder on the surface, there is a sense of astringency when touched by hand, it means that there are many impurities in the lubricating oil. Good lubricating oil is powder-free, dry and smooth to the touch of the hand, and the hall shows yellow marks.

5. Hand twisting method: twist the lubricating oil between the thumb and index finger and grind repeatedly, the better lubricating oil feel is lubricating, less grinding debris and no friction, if you feel that there are particles between the fingers and other large friction feeling, it indicates that there are many impurities in the lubricating oil, can not be used again, should be replaced with new lubricating oil.

Yes, flammable non-volatile oil-like lubricant. According to its three categories: animal oil, vegetable oil, petroleum lubricant and synthetic lubricating oil. The amount of petroleum lubricating oil accounts for more than 97 of the total consumption, and this lubricating oil often refers to petroleum lubricating oil.

It is mainly used to reduce the friction between the surfaces of moving parts, and at the same time has the functions of cooling, sealing, anti-corrosion, anti-rust, insulation, power transmission, cleaning impurities and so on. Mainly from the first distillation device of the lubricating oil fraction and residue fraction as raw materials, through solvent deasphalting, solvent refining, solvent refining, hydrorefining or acid and alkali refining, clay refining and other processes, remove or reduce the formation of free carbon substances, low viscosity index substances, substances with poor oxidation stability, paraffin wax and chemical substances that affect the color of refined oil and other components, to obtain qualified lubricating oil base oil, after blending and adding additives to become lubricating oil products. The most important properties of lubricating oil are viscosity, oxidative stability and lubricity, which are closely related to the composition of the lubricant fraction.

Viscosity is an important quality indicator that reflects the fluidity of lubricating oil. Different conditions of use have different viscosity requirements. Heavy duty and low speed machinery should use high-viscosity lubricating oils.

Oxidation stability indicates the oxidation resistance of an oil in the environment in which it is used due to temperature, oxygen in the air, and metal catalysis. After the oxidation of the oil, according to the use conditions, it will generate fine asphaltene-based carbon-like substances, viscous lacquer-like substances or paint films, or viscous water-containing substances, thereby reducing or losing its service performance. Lubricity indicates the anti-friction properties of the lubricating oil.

Supplement: Leakage of cylinder mattresses causes antifreeze to enter the oil;

whether the oil has deteriorated before filling;

The engine oil is only replenished but not replaced;

whether other products are mixed to trigger a chemical reaction;

Parking for long periods of time;

high temperatures for long periods of time;

Insufficient oil for a long time or too much oil filling;

Inaccurate ignition time of the engine or other mechanical failures, etc.

Deterioration is divided into emulsification (whitishing), oxidation (thickening), carbon deposition or excessive paint film makes the oil dispersion worse, and finally the poor quality of the oil filled, I don't know what kind of deterioration you are talking about.

The general situation is that the engine burns oil beyond the maintenance period, and the lubricating oil will also deteriorate, and the water temperature is higher than the repair, and the oil will deteriorate if you forget to change the engine oil after repairing, it should be these points, I don't know if I can help you.