Do you know what grease is? The role of grease

English name of lubricating grease; grease thick, oily semi-solids. It is used for the friction part of the machine, which plays the role of lubrication and sealing.

It is also used on metal surfaces to fill voids and prevent rust. It is mainly formulated from mineral oil (or synthetic lubricants) and thickeners. According to the thickener, it can be divided into two categories: soap grease and non-soap grease.

Metal soaps such as lithium, sodium, calcium, aluminum, zinc and other metal soaps are commonly used as thickeners for soap-based grease, as well as metal soaps such as potassium, barium, lead, and manganese. Graphite, carbon black, asbestos and synthetic (such as polyurea, bentonite) as thickeners of non-soap grease can be divided into general grease and special grease according to the use, the former is used for general mechanical parts, and the latter is used for tractors, railway locomotives, ship machinery, oil drilling machinery, valves, etc. The main quality indicators are dropping point, penetration, ash and moisture, etc.

The indicators used to evaluate the stability of grease colloids are oil separation test, rolling bearing performance test, etc. The drum test is a test method to test the change of consistency under the action of rolling. The fluidity test is to evaluate that the grease can be pumped at low temperatures.

Test methods for the ** properties of various greases. The water spray resistance test is a test method to evaluate the resistance of a grease to water elution. Colloidal stability is the ability of grease to keep colloidal stability during storage and use, and liquid mineral oil does not precipitate from grease.

Mechanical stability is the ability of a grease to resist changes in consistency under mechanical operating conditions. The ball bearing torque test is a test method to evaluate the low-temperature performance of lubricating greases. Grease is a stable solid or semi-solid product composed of a thickener dispersed in a liquid lubricant, in which additives and fillers designed to improve certain characteristics of the grease can be added.

The grease can adhere to the vertical surface at room temperature without loss, and can work in open or poorly sealed friction parts, with irreplaceable holding points of other lubricants. In general, greases with the same soap base are more compatible. Organoclay bases are incompatible with other bases.

Therefore, grease is used as a lubricating material in many parts of automobiles and construction machinery, which is what we often call butter! Function.

The main role of grease is to lubricate, protect and seal.

The vast majority of greases are used for lubrication and are called anti-friction greases. Anti-friction grease mainly plays the role of reducing mechanical friction and preventing mechanical wear. At the same time, it also plays a protective role against metal corrosion, and a sealing and dustproof effect.

There are some greases that are mainly used to prevent metal from rusting or corroding, known as protective greases. For example, there are a few greases such as industrial petroleum jelly that are specially used for sealing, which are called sealing greases, such as thread grease. Greases are mostly semi-solid substances with unique fluidity.

Constituent substance: Grease is mainly composed of three parts: thickener, base oil and additives. Generally, the thickener content in the grease is about 10%-20%, the base oil content is about 75%-90%, and the content of additives and fillers is less than 5%.

l. Base oil.

Base oil is the dispersion medium in the grease dispersion system, which has a great influence on the performance of the grease. Generally, the grease mostly uses medium viscosity and high viscosity petroleum lubricating oil as the base oil, and some synthetic lubricating oil is used as the base oil in order to meet the needs of mechanical lubrication and sealing under harsh conditions, such as ester oil, silicone oil, poly-olefin oil, etc.

2. Thickener.

The thickener is an important component of grease, and the thickener is dispersed in the base oil and forms the structural skeleton of the grease, so that the base oil is adsorbed and fixed in the structural skeleton. The water and heat resistance of greases is mainly determined by thickeners. There are two main types of thickeners used in the preparation of greases.

Soap-based thickeners (i.e., fatty acid metal salts) and non-soap-based thickeners (hydrocarbon, inorganic and organic).

Soap thickeners are divided into three types: single soap base (such as calcium base grease), mixed soap base (such as calcium sodium base grease), and compound soap base (such as compound calcium base grease). 90% of the grease is made with a soap-based thickener.

3. Additives and fillers.

A class of additives is to be found in grease, called glue solvents, which make the oil-soap combination more stable? Such as glycerin and water, etc. Once the water is lost in calcium-based grease, its structure is completely destroyed and cannot be formed into grease, such as glycerin in sodium-based grease can adjust the consistency of grease.

Another type of additives is the same as in lubricating oils, such as antioxidants, anti-wear and anti-rust agents, but the dosage is generally higher than that in lubricating oils.

Such as phosphate ester, ZDDP, ELCO extreme pressure anti-wear agent, compounding agent, dropping point raiser, etc. Sometimes, in order to improve the ability of the grease to resist loss and enhance lubrication, some graphite, molybdenum disulfide and carbon black are often added as fillers.

At present, Shanghai Tiger Head Hotolube, Kluber, Bosh, etc. basically use the fully synthetic grease process, and the quality is far better than ordinary grease, and the role of grease has.

First, it is mainly lubrication, protection and sealing. The vast majority of greases are used for lubrication and are called anti-friction greases.

2. According to the base oil, it is divided into fully synthetic base oil grease and mineral base oil grease, although the grease produced by synthetic base oil has complex process, it has high temperature resistance, low temperature resistance, durability and other functions.

Grease flows less than oil, so it adheres to parts more easily, solving the problem that liquid lubricants cannot hold on poorly sealed or unsealed parts. As for the function, in addition to the basic lubrication effect, there are sealing, heat dissipation, damping, anti-rust, waterproof, anti-seizure, noise reduction and many other functions, we have products are even used in the piano to mediate the tone of the device, the military eagle star hopes to be able to help you, we are best at product design, research and development, to bring you the most cost-effective products.

1. Different adhesion: when the friction part is in a static state, the grease can maintain its original shape, and will not be automatically lost by gravity, nor will it slip off on the vertical surface and drip out from the gap. This feature is very suitable for friction parts that stop and stop or do not run frequently, for parts where it is very difficult to replenish grease materials (such as lubrication parts for aerial work of overhead cranes), and for open or poorly sealed parts.

2. Different temperature ranges: The working temperature range of grease is wider than that of lubricating oil. For example, general purpose lithium greases can be used in the -20 120 temperature range, and general calcium or lithium greases can also be used in -20 60 or -20 120.

However, a certain grade of lubricant uses a much narrower temperature range.

3. Different pressure resistance: the adsorption capacity of grease on the metal surface is much greater than that of lubricating oil, and it can form a relatively strong oil film and withstand a relatively high working load, which is the result of a large number of polar substances contained in the grease. In addition, as a base grease, when polar additives are added, the susceptibility is also better than that of lubricating oil.

In appearance, lubricating oil is liquid, whereas grease is in the form of a paste or colloid. This also determines that the adhesion of grease is better than that of lubricating oil. I used the lubricating oil before, but then I felt that it was still not very easy to use, and when I went to the repair shop again to do maintenance, I saw the Jinguan grease used by the master, which seemed to be quite easy to use.

Later, I bought it myself, and I think the effect is better than that of lubricating oil.

Lubricating oil is a liquid lubricant used in various types of machinery to reduce friction and protect machinery and processed parts, mainly playing the role of lubrication, cooling, rust prevention, cleaning, sealing and buffering. Including: grease, gear oil, hydraulic oil, automotive oil, anti-rust oil, etc.

English name of lubricating grease; grease thick, oily semi-solids. It is used for the friction part of the machine, which plays the role of lubrication and sealing.

It is also used on metal surfaces to fill voids and prevent rust. It is mainly formulated from mineral oil (or synthetic lubricants) and thickeners.

Grease is a category of lubricating oils.

Grease: Semi-solid lubricant.

Lubricating oil: liquid lubricants.

The difference between grease lubrication and oil lubrication is the adhesion and temperature range. Details are as follows:

Different adhesions:

When the friction part is at rest, the grease retains its original shape and does not automatically lose due to gravity, nor does it slide on the vertical surface and drip out of the gap. This is very suitable for friction parts that do not start or start frequently, parts that are difficult to replenish grease materials (such as working lubrication parts in the air of overhead cranes), open parts or parts with poor sealing.

Temperature ranges are different:

Greases operate in a wide range of high temperatures than oils. For example, a general lithium-based grease can be used in a temperature range of -20 to 120 degrees Celsius, and a general calcium-based or lithium-based grease can also be used in the temperature range of -20 to 60 degrees Celsius or -20 to 120 degrees Celsius. The temperature range of a certain brand of lubricant is much narrower.

Different withstand voltages:

The adsorption capacity of grease on the metal surface is much greater than that of lubricating oil, which can form a relatively firm oil film and withstand relatively high working loads, which is due to the fact that grease contains a large number of polar substances. In addition, as a base grease, when polar additives are added, the susceptibility is better than that of lubricating oil.

Millions of car purchase subsidies.

The grease is in the form of a paste, and the grease is based on the industrial lubricant with a thickener. The lubricating oil is oily, the lubricating oil has strong fluidity and slightly higher volatility. Grease is generally used on metal surfaces to fill voids and prevent rust.

Lubricating oil can be used in various types of machinery, mainly for lubrication, cooling, rust prevention, cleaning, sealing and buffering.

The difference between grease and oil is detailed:

1. Lubricating oil is used in various types of machinery, the role is to reduce friction, so as to protect the liquid lubricant of machinery and processed parts, mainly playing the role of lubrication, cooling, rust prevention, cleaning, sealing and buffering.

2. Grease is a relatively viscous grease-like semi-solid. It is used in the friction part of the machine to compose the slag, and has the effect of lubrication and sealing. It is also used on metal surfaces to fill voids and prevent rust.

3. The grease is divided into fully synthetic grease and mineral oil grease according to the base oil, and the grease produced by synthetic base oil has a more significant effect than the grease produced by mineral oil in terms of high temperature resistance, low temperature resistance and durability, and the process is very complex.

Lubricating oil and grease are all commonly used lubricants in lubrication systems, lubricating oil often refers to grease with small viscosity coefficient, and liquid at room temperature; Grease often refers to grease with a slightly larger viscosity coefficient, and is often paste-like at room temperature. At present, the better ones are: Shanghai Tiger Head Hotolube, Klubo, Dr., etc., basically all of them are fully synthetic grease processes.

Photo by Chen Jie 2).

The words of grease are: grease and paste, slippery head, floating head and slippery brain.

The words of the greasing greaser are: slippery and treacherous, grease is not moist, and the wind dances. 2：

The part of speech is, noun. 3: The structure is, moist (left and right structure) slippery (left and right structure) lipid (left and right structure).

4: Zhuyin is, 5: Pinyin is, rùnhuázhī.

The specific explanation of grease is what to open in the shed, we will introduce it to you through the following aspects of resistance and chain:

1. Explanation of terms [click here to view the details of the plan].

English name of lubricating grease; grease thick, oily semi-solids.

Idioms about grease.

Runwu moistens the body, slippery mud, waves, sudden ladders, funny jade, runs, beads, round, wind dances, runs, slippery, treacherous, infiltrated ointment, sebming cream, smearing fat, incense, floating head, slippery brain, fat ointment.