Come sappiamo tutti, the role of grease in imported bearings. It can be said that the maintenance of any imported bearing is inseparable from grease. Is it true that the more grease, the better? Certo, the answer is No. let’s take Nachi imported bearings as an example to explain to you.
We all know the important role of grease in the use of Nachi bearings. Is the more grease the better for the Nachi Imported Bearing bearings? In fact, too much grease does a lot of harm. Grease has good adhesion, wear resistance, temperature resistance, rust resistance and lubricity.
It can improve high-temperature oxidation resistance, delay aging, dissolve carbon deposition, prevent the agglomeration of metal wear Nachi Imported Bearing debris and oil, and improve the wear resistance, pressure resistance and corrosion resistance of machinery. The more grease is filled, the greater the friction torque.
With the same filling amount, the friction torque of sealed bearing is greater than that of open Nachi bearing. After the grease filling Nachi Imported Bearing amount is equivalent to 60% of the internal space volume of Nachi bearing, the friction torque will not increase significantly.
This is because most of the grease in the open bearing has been extruded and the grease in the sealed bearing has leaked. With the increase of Nachi Imported Bearing grease filling amount, the temperature rise of Nachi bearing increases linearly. At the same filling amount, the temperature rise of sealed bearing is higher than that of open bearing.
It is generally believed that the grease filling amount of sealed rolling Nachi Imported Bearing bearings shall not exceed about 50% of the internal space. 20% a 30% is suitable for ball bearings.
There are great differences between the working surface and the core of bearing parts in terms of state, structure and performance Nachi Imported Bearing requirements, but the overall heat treatment can not be taken into account, and the potential of materials can not be brought into full play.
The application of material surface strengthening technology can not only better solve the differences in Nachi Imported Bearing structure and requirements between the surface and the core, but also further make the surface obtain some special working properties, so as to meet the requirements of bearings working under specific conditions.
This is of great significance in the development of modern science and technology. The traditional surface strengthening method belongs to the category of heat treatment. The surface strengthening methods such as laser, electron beam and ion beam developed in modern times not only apply some high and new technologies to the surface strengthening of materials,
but also go beyond the scope of traditional heat treatment and form a new technical field. Perciò, the current surface strengthening technology can form a variety of Nachi Imported Bearing classification methods from different angles.
According to the physical and chemical process of surface strengthening technology, it can be roughly divided into five categories: surface deformation strengthening, surface heat treatment strengthening, chemical heat treatment strengthening, surface metallurgy strengthening and surface film strengthening.
The metal surface layer is plastically deformed by mechanical methods to form a hardened layer with high hardness and high strength. This surface strengthening method is called surface deformation strengthening, also known as work hardening.
Including shot blasting, sand blasting, cold extrusion, rolling, cold rolling and impact, explosion impact strengthening, eccetera. The characteristics of these methods are: the strengthening layer dislocation density increases and the sub crystal structure is refined, so as to improve its hardness and strength and reduce the surface roughness value,
which can significantly improve the surface fatigue strength of parts and reduce the sensitivity of fatigue notch. This strengthening method has the advantages of simple process and remarkable effect. There is no obvious boundary between the hardened layer and the matrix, the structure is coherent, and it is not easy to fall off in use.
Most of its methods have been applied in the bearing industry: the surface impact strengthening of rolling element is the application of this kind of method, and precision rolling has become a new ferrule processing and strengthening method.