What happens to the temperature viscosity characteristics of lubricating oil when diesel is mixed wi

When the lubricating oil is mixed with diesel, the viscosity and temperature characteristics will definitely deteriorate!

Let me first state that the viscosity temperature characteristic is not viscosity, and the viscosity temperature characteristic is determined by the magnitude of the change in viscosity at different temperatures.

Because the kinematic viscosity of diesel is inherently small, the viscosity after mixing at 90 degrees is definitely smaller than that before mixing, because the viscosity of diesel is poor, after mixing, the viscosity difference from 40 degrees to 90 degrees becomes larger, so the viscosity and temperature performance will become worse.

It is best not to mix diesel in lubricating oil, even if it is mixed with lubricating oil, it depends on their compatibility and the compatibility of additives.

There is a possibility that the greater Ken is mixed with water or something like that or that is not well sealed.

In the end, the viscosity of the latter should be large, because the ignition point of diesel is low and volatile, and the active ingredients will volatilize when it reaches a certain temperature, and some residues will be mixed in the lubricating oil and affect its own viscosity.

Theoretically, a high viscosity should not be good for the machine itself. will lead to accelerated wear and tear.

Non-professionals, just amateurs to discuss and learn, hehe.

The kinematic viscosity of diesel oil (20 ), mm2 s lubricating oil is relatively large, and the lubricating oil enters the diesel oil, which I think should reduce the viscosity of the lubricating oil.

And then there's the lightning of diesel, and the national standard is just over 50 degrees, and heating it to 90 degrees will make the diesel burn or it will be fractionated

It's just my personal opinion, please forgive me if there is any mistake.

Viscosity is one of the important quality carryover indicators of diesel fuel, which is related to diesel delivery, pump operation and spray conditions:1. Affects oil**.

If the diesel slow viscosity is too small, it will involve power loss from the injection pump, lubrication of fuel components and internal leakage loss, but will reduce the effective fuel supply. On the other hand, if the viscosity is too high, which involves the design, size and characteristics of the engine's fuel injection system, then the effective fuel supply will be exceeded. Although the power is increased, it will cause incomplete combustion, black smoke from the exhaust, and increased fuel consumption.

2.For diesel fuel with too low viscosity, the oil speed is easy to diffuse, and the fineness is good, but the penetration is extremely small. During combustion, a part of the air gas far away from the injector cannot be mixed with diesel, which reduces the utilization coefficient of the air body; The opposite is true for high-viscosity diesel.

Therefore, the viscosity of diesel fuel is required to be appropriate in order to form a homogeneous combustible mixture. 3.Affects the lubrication of precision parts of the oil supply system.

Moving parts such as plungers, needle valves, and needle valve bodies are mainly lubricated by diesel. If the viscosity of diesel fuel is too small, the relative resistance to movement of the above-mentioned accessories will increase and wear will increase. Disturb the grinding.

Millions of car purchase subsidies.

Categories: Education Science >> Science & Technology >> Engineering Technology Science.

Analysis: Lubricant is a very important class of petroleum products, it can be said that all machines with moving parts need lubricants, otherwise they will not be able to operate normally. Lubricants include oils and greases, and here we discuss lubricants.

Classification of lubricating oils.

The ISO 3448-92 standard has been developed by the International Organization for Standardization, which divides industrial lubricants into 20 grades according to their kinematic viscosity (mm2 s) at 40 hours, while internal combustion engine oils and vehicle gear oils are still divided according to the kinematic viscosity at 100 hours and the viscosity at low temperatures. Located in the same international standard, China's industrial lubricant viscosity classification standard also adopts this viscosity classification, and adds "n" in front of the viscosity number"letters, to distinguish the old grade with a viscosity of 50.

Although there are many varieties of lubricating oil, they are all made with base oil as the main body and adding appropriate additives. Base oils can be divided into two categories: mineral oils and synthetic oils. The so-called mineral oil is a lubricating base oil prepared from the best vacuum fraction or vacuum residue as raw material, and through the process of deasphalting, dewaxing and refining according to the need, mineral oil is the main raw material for the production of various lubricating oils.

However, mineral oil sometimes does not have the properties of low temperature resistance, high temperature resistance, high vacuum, flame resistance, radiation resistance and other properties required by special occasions such as aviation, aerospace and national defense. Therefore, it is also necessary to produce some synthetic lubricants with special properties through synthesis. Synthetic lubricants include poly-olefins, silicone oils, polyethylene glycols, diesters, phosphates, silicates, aldehydes, fluorocarbons, chlorofluorocarbons, polyethers, etc.

It is customary to divide lubricating oils into the following six categories according to their use occasions for convenience:

1) Internal combustion engine lubricating oil, including gas engine oil and diesel engine oil, etc.;

2) Gear oil, which is characterized by the pressure on the parts can be as high as 600-4000MPa;

3) Electrical oil, which does not play a lubricating role in use, but plays a role in insulation;

4) Hydraulic oil is a liquid medium used to transfer energy in transmission, braking devices and shock absorbers, and it also lubricates and cools.

5) Mechanical Oil This is a lubricant used on general machinery with less harsh conditions, and its quantity is second only to engine lubricant.

6) Process oils include various metal cutting fluids, heat treatment fluids and forming fluids (steel rolling fluid, aluminum rolling fluid, etc.).

In addition, there are turbine oils, refrigeration oils, cylinder oils, compressor oils, instrument oils, vacuum pump oils, and other lubricants with specific purposes.

The determination of the kinematic viscosity of lubricating oil is to use a special instrument of glass to measure the time required for a certain amount of lubricating oil to flow through a capillary at a specified temperature to grade the lubricating oil. The higher the temperature of the same grade of lubricating oil, the lower the viscosity, which is due to the increase in temperature, the gravitational force between the molecules decreases, and generally liquids have this property.

The viscosity of lubricating oil is related to the temperature blind width, and the viscosity increases with the increase of temperature.

a.That's right. b.The wrong god is wrong.

Correct Answer: False.

What is big of diesel, because it is easy to solidify in winter, so that what is supplied with oil.

Hello dear! The drop in temperature in winter causes the diesel fuel to thicken and solidify (commonly known as frozen oil), which will cause the vehicle to fail to start. Why does diesel "freeze"?

In the final analysis, it is due to the fact that the diesel contains Shitan spring mold wax, and when the temperature plummets, the paraffin wax precipitates, resulting in the inability of the diesel to flow, the clogging of the diesel filter, and the inability of the diesel to enter the engine cylinder. Therefore, how to prevent and solve the problem of diesel winter "freezing" has become a headache for diesel drivers, and even some "old drivers" take the treatment of drinking water to quench their thirst, resulting in safety and alleviation of hidden dangers and even major losses. Having said that, in order to prevent such problems from occurring, you should first understand the characteristics and technical indicators of diesel.

Diesel "freezing" is affected by air temperature, and the most direct relationship with air temperature is the flow performance index of diesel, which mainly represents the freezing point (SP) and condensation point (CFPP). The freezing point (SP) represents the maximum temperature at which the diesel loses its fluidity, and if the air temperature is lower than the freezing point temperature of the diesel, the diesel will lose its fluidity within the fuel system, causing the vehicle to fail to start. The model of diesel is named according to its freezing point, and the freezing point of the diesel is the number.

Therefore, choosing the right diesel label is the first step in preventing diesel "freezing", and different diesel labels represent different regions and temperature conditions. At present, the light diesel oil used in China is divided into 7 grades according to the freezing point: 10 diesel, 5 diesel, 0 diesel, 10 diesel, 20 diesel, 35 diesel and 50 diesel.

If the label of diesel is not suitable for the temperature range, the fuel system in the engine may form wax, block the oil circuit, and affect the normal operation of the engine. The lower the grade of the diesel, the less likely it is to form wax and, of course, the higher it is. In the temperature range that is suitable for one grade of diesel, it is of course better to use diesel with a lower grade.

The cold filter point (CFPP) indicates the maximum temperature at which diesel can cause a filter to clog as it passes through the diesel engine's fuel supply system. For light diesel oil, the cold filter point is more important than the freezing point index in actual use. This is because the cold filter point is directly related to the low-temperature performance of diesel, while the freezing point is mainly related to the storage and transportation of diesel.

Therefore, a correct understanding of the meaning of diesel technical indicators is the first step for diesel vehicle drivers to prevent diesel "freezing". However, even if the diesel label was correctly selected in the temperature before Senlao, it was still impossible to avoid the "freezing" of the diesel when the temperature plummeted. Therefore, old drivers who drive diesel vehicles will habitually be equipped with diesel antifreeze to prevent diesel "freezing".

When the temperature rises and hail, the viscosity of the lubricating oil (). Jing Min disturbed.

a.It is elevated.

b.Remain the same.

c.Then the brightness decreased.

d.May be elevated or decreased.

Correct answer: c