The difference between mechanical oil and hydraulic oil, the difference between hydraulic oil and en

The differences between hydraulic oil and motor oil are as follows:

1. Different functions:

The main function of hydraulic oil is to transmit power, similar to the gasoline used in our cars, which can provide relatively large power to the car. And the main function of engine oil is to reduce the friction of the engine and avoid damaging the engine.

2. The composition of additives is different

Due to the difference in function between the two, the ingredients added to the oil are also quite different. Engine oil contains a variety of functional additives such as cleaning and dispersing agents, while hydraulic oil contains additives such as anti-oxidation, anti-rust, and anti-wear additives in the additive composition.

3. Oil viscosity index:

Generally speaking, motor oil is comparatively denser, so it is a bit thicker. Hydraulic oil, on the other hand, has a relatively low density, so it is thinner than engine oil in terms of viscosity.

4. Different colors:

Since the density of the hydraulic oil is relatively low, it should be lighter in color. Whereas, the oil is thicker, so the color looks stronger.

Machinery oil only serves as a lubricating agent. Hydraulic oil plays the role of energy transfer, anti-wear, system lubrication, anti-corrosion, anti-rust, cooling and so on in the hydraulic system. The specific functions are as follows:

Petroleum lubricating oil fraction is a general quality lubricating oil obtained by dewaxing, solvent refining and clay treatment. Usually only antioxidant additives are added. Machinery oil is divided into high-speed mechanical oil and ordinary mechanical oil, which are used for the lubrication of general machinery such as textile machinery spindles and ordinary machine tools, and are divided into grades according to 50 kinematic viscosity.

Hydraulic oil is the hydraulic medium used in the hydraulic system using liquid pressure energy, which plays the role of energy transfer, anti-wear, system lubrication, anti-corrosion, anti-rust and cooling in the hydraulic system. For hydraulic oil, first of all, it should meet the requirements of the liquid viscosity of the hydraulic device at the working temperature and the starting temperature, because the viscosity change of the lubricating oil is directly related to the hydraulic action, transmission efficiency and transmission accuracy, and also requires that the viscosity temperature performance and shear stability of the oil should meet the various needs of different uses.

The difference between engine oil and hydraulic oil is simply put: engine oil is mainly used for lubrication, cleaning and cooling. The main role of hydraulic oil is hydraulic. And the ingredients are also very different.

Specific differences:1In terms of fields, hydraulic oil is mainly used in the field of industrial lubricants, while engine oil is generally used in the automotive field.

2.In terms of color, the color of hydraulic oil is generally golden yellow and transparent, while the engine oil is relatively blue.

3.In terms of manufacturing and production, the general hydraulic oil is mostly semi-finished oil, and they have a significant feature that they are resistant to high pressure, and the manufacturing process is slightly worse than that of engine oil. One of the most significant characteristics of engine oil is lubrication, compared with hydraulic oil, its internal tissue particles are smaller than hydraulic oil, and the viscosity is generally higher than that of hydraulic oil.

In daily application, many old equipment in the description of the information, it is written that the use of oil lubrication, the old equipment marked with oil is not actually the current conventional use of internal combustion engine oil, but mechanical oil, most of these old equipment lubrication has been replaced by hydraulic oil, there will also be some factories use internal combustion engine oil lubrication.

Internal combustion engine oil is a lubricating oil specially used for gasoline engines and diesel engines produced according to the requirements of engine workers, requiring a variety of performance such as high cleanliness and dispersion, and the oil contains several functional additives such as cleanliness and dispersion.

Hydraulic oil is mainly used in all kinds of hydraulic oil system, its viscosity grade is determined by the working conditions of the hydraulic system, and the additives used are anti-oxidation, anti-rust, anti-wear and other additives, which are completely different from internal combustion engine oil. In general, hydraulic fluids cannot be used as internal combustion engine oils due to their lack of clean dispersibility. However, in order to simplify the variety of oil used on site, internal combustion engine oil (viscosity suitable) is also used as hydraulic oil in individual cases.

However, its performance indicators such as demulsification, hydrolysis stability, etc. cannot meet the requirements of hydraulic oil specifications. Therefore, in underground, water, and humid environments, internal combustion engine oil must not be used as a substitute for hydraulic oil.

The concept of engine oil is more general, all lubricating oil can be called engine oil is the abbreviation of mechanical oil, its composition is base oil, add a little antioxidant, viscosity can be selected, but the most used may be 100

The hydraulic oil is mainly used in the hydraulic system, is a kind of industrial lubricating oil in the industrial field, ordinary hydraulic oil (and synthetic different) is the base oil in the preparation of antioxidants, anti-wear agents, anti-foaming agents, and so on, a variety of additives. Among them, anti-wear agents contain a large amount of zinc, which should be in the hundreds of ppm. Its viscosity is also optional, and the most used is 46

The main difference between the two is that there are more additives in hydraulic oil, so some have better performance.

In terms of appearance, in general, the hydraulic oil is golden yellow and transparent, and the engine oil has some blueish tinges, and the transparency is not as good as the hydraulic oil.

The No. 6 hydraulic transmission oil in the hydraulic transmission oil is used for hydraulic torque converters and hydraulic couplings of large vehicles such as diesel locomotives, heavy-duty trucks, tracked vehicles, and off-road vehicles. It can also be used for the hydraulic transmission system of construction machinery; No. 8 hydraulic transmission oil is mainly used in the hydraulic automatic transmission system of various cars and light trucks.

Hydraulic transmission oil, also known as automatic transmission oil or automatic transmission oil, is used as a working medium in vehicle automatic transmissions.

Differences in performance.

The hydraulic oil has suitable viscosity and good viscosity and temperature performance to ensure that the power can be transmitted accurately and sensitively under the condition of changing working temperature; It has good rust resistance and oxidation stability, and is not easy to oxidize and deteriorate under high temperature and high pressure conditions; It has good anti-foaming properties, so that the foam produced by the oil is easy to disappear under the working condition of continuous stirring by machinery to make the power transmission stable.

The hydraulic transmission oil has suitable viscosity and good viscosity and temperature performance to ensure the normal operation of the hydraulic transmission device in the temperature range of 40 170; Good anti-wear to ensure that all kinds of hydraulic transmission parts of different materials are not easy to be worn under operating conditions; Good thermal stability and oxidation stability to adapt to long-term cycling under working conditions of 70 140 (or even higher).

1. The difference between viscosity and temperature sensitivity. Hydraulic fluids generally require a relatively high viscosity, which can improve the stiffness of the system, and the viscosity is less affected by temperature, the better, because high temperature will reduce the viscosity of the messenger. Therefore, the choice of hydraulic oil should take into account both.

The mechanical oil is mainly lubricated, and this is the main principle of selection.

2. The cleanliness of hydraulic oil is relatively high, there are several layers of filtration devices in the system, and the filtration of some systems is very strict, especially for foreign products.

Machinery oil is now known as total loss system oil.

Because there are many types of machinery and equipment, and the roles they play are also different, there are many varieties of lubricating oil required. The most commonly used and representative lubricants are:

The first category is gasoline engine oil and diesel engine oil. Gasoline engine oil is used in various gasoline cars and gasoline engines; Diesel engine oil is used in diesel cars, tractors, diesel locomotives, etc. The main function of this type of lubricant is lubrication and cooling.

The second category is mechanical oils (including high-speed mechanical oils). Machinery oil and heavy machinery oil are mainly used in textiles, sewing machines and seed preparation lathes, etc., and its main function is also to play a lubricating role.

The third category is compressor oil, turbine oil, refrigeration oil, and cylinder oil. They are used in compressors, steam turbines, and refrigerations, respectively, while cylinder oil is used in steam locomotives and in cylinders that are in direct contact with steam. It mainly plays a sealing role.

The fourth category is gear oil. It is also divided into industrial gear oil and automobile and tractor rotary gear oil. Industrial gear oil is mainly used in various industrial machinery, such as rotary furnaces, rolling mills and other gear transmission mechanisms.

Automobile and tractor gear oil is used in their gearboxes, gearboxes and other components and hyperbolic gear transmissions for luxury cars and off-road vehicles. The main quality requirements for this type of lubricating oil are lubricity and anti-wear, and at the same time, in order to ensure that cars and tractors start at low temperatures, they should also have a low freezing point.

The fifth category is hydraulic oil, which is mainly used as the transmission medium of various hydraulic machinery, such as the transmission mechanism of automobiles, mining machinery, etc.

The sixth category is electrical oil, including transformer oil, cable oil, etc. It is mainly used for preparing electrical equipment. Lubrication is not required for this type of oil, but electrical properties are required.

Because the raw materials and production processes of these oils are similar to those of other types of lubricants, they are usually included in the category of lubricants.

It can be seen that there are many different lubricants, each with a special purpose and special requirements, therefore, generally not interchangeable.

Hydraulic oil is the working medium used to transfer energy in the hydraulic transmission and control system, and has the functions of lubrication, cooling and rust prevention. It is usually made from deeply refined petroleum lubricants, base oils or synthetic lubricants with anti-wear and antioxidants. It is widely used in machine tools, mining construction machinery, agricultural machinery, transportation machinery, aerospace and other aspects.

Engine oil: It is specially used to lubricate the engine, also known as engine lubricating oil.

Hydraulic oil is a hydraulic combustion medium used in the hydraulic system with the help of liquid pressure energy, which plays the role of energy conversion and transmission, anti-wear, system lubrication, anti-erosion gearing, rust prevention, refrigeration, sealing and so on in the hydraulic system. Hydraulic oil is one of the special oils that transmit pressure (power), which are ordinary hydraulic oil, anti-wear hydraulic oil and low condensation point hydraulic oil.

Difference Between Engine Oil and Hydraulic Oil:

Similarities. Engine oil and hydraulic oil also have the functions of anti-wear, refrigeration, anti-rust, cleaning, sealing and so on.

Key role in the difference between the paragraphs.

In terms of key role, there is still a difference between engine oil and hydraulic oil for engineering machine equipment. The key role of lubricating oil is to reduce the obstruction caused by the collision of objects; The key role of hydraulic oil in construction machinery equipment is to transmit pressure (power).