Knowledge

Rolling bearing is the most widely used in rotary machinery, and it is also one of the most easily damaged components.Many failures of rotating machinery are related to rolling bearings. The working quality of bearings has a great impact on the working state of machinery. The defects will lead to abnormal vibration and noise of equipment, and even damage the equipment in serious cases.Correct condition monitoring and diagnosis of rolling bearings is an important aspect of equipment optimization management and predictive maintenance in modern enterprises.

The spalling at the limit position of the single side of the channel is mainly manifested in the serious spalling belt at the junction of the channel and the retaining edge.The reason is that the bearing is not installed in place or sudden axial overload in the process of operation.The countermeasures are to ensure that the bearing is installed in place or the outer ring fit of the free side bearing is changed to a clearance fit, in order to compensate the bearing when the bearing is overloaded.If it is impossible to ensure that the installation is in place, the oil film thickness of the lubricant can be increased (to improve the viscosity of the lubricant), or the load of the bearing can be reduced to reduce the direct contact of the bearing.

Under a certain load, the number of revolutions or hours experienced by the bearing before pitting is called the bearing life.

Whether the bearing is correctly installed is related to the service life of the bearing, so we must pay attention to the following Longteng bearing to introduce the five steps of the correct installation of the bearing in detail. I hope it will be helpful to you who are using the bearing.

Four rows of cylindrical roller bearings and six rows of cylindrical roller bearings are almost all used in the roll neck, roller and rolling machine of the steel rolling frame.These bearings have low friction compared with other roller bearings.Because these bearings are usually mounted on the roll neck with interference fit, they are particularly suitable for rolling mill applications with high rolling speed.The low cross section of these bearings allows the use of a relatively large roll neck diameter compared to the roll diameter.Due to the large number of rollers, the radial load capacity is very high.

Railway locomotive and rolling stock bearings refer to bearings used in locomotives and rolling stock.On the locomotive bearing including axle box bearings, bearings, traction motor bearings, transmission system power plant bearing and the bearing of the cooling system, etc, and the bearing on the railway vehicle is the main axle box bearings, passenger car axle box multi-purpose short cylindrical roller bearing, truck axle box mainly adopts circular cone roller bearings, varieties, structure, performance of these vehicles bearing are similar to those of locomotive axle box bearing basic.

Characterized by large area, shallow depth, easy to find.The main reason for this rust is that there is moisture, dust and gases such as SO2, H2S, CO2 in the atmosphere. In hot and humid conditions in summer, especially in places with large air flow, the peripheral of bearing stacking is prone to this rust.

Bearing position wear of roller press is a common equipment fault in the process of roller press operation. What causes bearing position wear of roller press?

Bearing is an indispensable part of modern mechanical equipment, its main function is to support the mechanical rotating body, reduce the friction coefficient of the mechanical rotating body in the process of movement, and ensure its rotation accuracy.

At present, there is no significant deficiency in the types, varieties and specifications of bearing products, and it basically has a relatively complete product line.However, the product mix is not very balanced.The production capacity of middle and low-end ordinary products has produced the situation of surplus, while the market of high-end products is still mostly occupied by foreign famous brand products.So far, no very significant breakthroughs have been made.

In recent years, Automatic Transmission (AT) has become more and more multi-stage in order to reduce the fuel consumption of cars.Due to changes in the AT multistage design, the needle roller and cage assemblies of planetary gears need to accommodate high speeds.In addition, multiple ATs lead to an increase in the number of components, requiring smaller and lighter needle roller and cage components to reduce weight.This causes the needle roller and cage assembly to be subjected to high loads to produce the same level of torque as a conventional AT.Moreover, in order to reduce the rotating resistance of the various components in the AT to save energy, the viscosity of the oil in the AT tends to decrease, and the operating conditions of the needle roller and cage components become more and more demanding.

Bearing temperature is too high, similar to the abnormal situation of "fever".It is a common and harmful fault of rotating equipment. If the reason is unknown and improper treatment, it will often get twice the result with half the effort, which will reduce the service life of bearings, increase the cost of maintenance, and even cause bearings to burn out. · Therefore, to quickly determine the cause of the failure and take appropriate measures to solve it is the guarantee of continuous and safe operation of the equipment.

Realists recently learned from Northwestern Polytechnical University: the School of Materials Professor Liu Dong and his team developed a strong rolling technology (PTR) has made a major breakthrough, cracked the problem of China's related industry development.

In 2020, China's bearing industry will achieve a total revenue of 193 billion yuan from its main business, with a year-on-year growth of 9.04%.It is mainly affected by the rapid growth of supporting bearing enterprises in infrastructure construction, such as wind power, engineering machinery, metallurgy and mining.

Bearing rollers are used in a wide range of applications, from heavy equipment and machinery to power generation, manufacturing and aerospace.This paper will introduce the knowledge of bearing roller processing steps in detail