According to the characteristics of the working environment of the machine, in order to make the bearing long-term lubrication at continuous high temperature, ensure the normal operation of the machine, reduce the downtime, reduce the number of maintenance and maintenance costs, etc., what requirements should the high temperature grease used meet?
Product requirements for mechanical greases:
1, high temperature resistance: high temperature grease should meet at least 200°C long-term work will not be lost, many grease to drop point to express high temperature propaganda, temperature resistance of 300 degrees and so on. In fact, the drop point does not represent the temperature of the grease. For example, a brand of high temperature grease does not have a drop point, but the actual use is generally not more than 200 degrees, in actual use, more important is high temperature stability, such as: oil volatility, high temperature shear stability (that is, the degree of grease thinning when the bearing runs at high temperature) and other comprehensive performance;
2, water vapor environmental impact: resistance to water and water vapor, especially at high temperatures, high temperature grease must not be emulsified in water, do not dissolve, do not absorb water, and its components do not hydrolysis;
3, oxidation resistance: high temperature grease must have good oxidation stability, grease in high temperature environment in contact with the air, will not be quickly oxidized to produce oxides, to avoid coking carbon.
The role of grease reduces mechanical friction to prevent metal corrosion: the grease we often use is actually a lubricating oil made of thickening agent and base oil, which is more viscous than ordinary lubricating oil, so it is easier to stick to the surface that needs lubrication and will not flow easily, mainly to reduce mechanical friction and prevent wear of parts. At the same time, it can also play a role in preventing metal corrosion.
There are three commonly used greases: calcium based, lithium based, high temperature lithium based
First, calcium base grease
Calcium grease is cheap and easy to obtain, has been often used by us, is characterized by high temperature resistance, easy flow, poor weather resistance.
With the improvement of the performance of modern vehicles, the requirements for grease are getting higher and higher, and this grease has been eliminated because the performance can not keep up with the use of requirements, here will not focus on explaining.
Second, ordinary lithium grease
Ordinary lithium grease because of its stable performance and good weather resistance, has been widely used by us to replace calcium grease, we have its figure in the various lubrication points of the whole car, such as the saddle of the tractor will often use it, but in some places with high operating temperature performance is still slightly insufficient.
Three, high temperature lithium grease
High temperature lithium grease is mainly used in some relatively high temperature, relatively fast mechanical structures, such as the wheel bearings of our cars, its performance at high temperatures is also relatively stable, is the best choice for wheel bearing lubrication.
Grease is an important part in mechanical equipment, in order to allow bearings to operate normally, reduce bearing wear, extend bearing life, we all know that it must be filled with grease, so the amount of bearing grease is very important. We specialize in the production of grease, the quality of our products is guaranteed, the variety is diverse, mainly:, nano waterproof agent, non-oil grease, noise reduction silicone grease, ball grease, plastic grease, valve grease, contact grease, damping grease, low temperature grease, anti-wear grease, molybdenum disulfide grease production. (2023-09-27)
