Overview of ball bearings Ball bearing components Introduction to ball bearing performance
Ball bearings
Ball bearings are a type of rolling bearing. Spherical alloy steel balls are installed between the inner steel ring and the outer steel ring to reduce friction during power transmission and improve mechanical power transmission efficiency in a rolling manner. Ball bearings cannot bear large heavy loads and are more common in light industrial machinery. Ball bearings are also called ball bearings.
Overview of ball bearings
Pronunciation: gun zhu zhou cheng
Source: Mechanical Dynamics
Example : Common equipment using ball bearings include: motor drive shafts, transmission parts of light (civilian) motor vehicles, machining equipment, factory production line mechanical transmission assemblies, etc.
Ball bearing components
Ball bearings mainly include four basic components: balls (ball), inner rings (inner ring), outer ring (outer ring) and retainer ( cage or retainer), as shown in the figure. Ball bearings for general industrial use meet the standards of AISI52100. The balls and rings are usually made of high-chromium steel with a Rockwell hardness (Rockwell C – scale hardness) is approximately between 61-65.
Ball bearing performance
The hardness of the cage is lower than that of the balls and rings, and its materials are metal (such as medium carbon Steel, aluminum alloy) or non-metal (such as Teflon, PTEF, polymer materials). Rolling bearings (rolling bearings) have smaller rotational friction resistance than journal bearings (journal bearings). Therefore, at the same rotation speed, the temperature due to friction will be smaller. Low.
Ball bearings are generally used in low-load mechanical transmission equipment. Because the bearing area of ball bearings is small, it is easy to cause serious problems when running at high speeds.Mechanical damage, so needle roller bearings are often used in heavy-load mechanical transmissions to increase the load-bearing surface, improve mechanical transmission efficiency, and reduce mechanical damage.
Ball bearings change the friction method of the bearings and adopt rolling friction. This method more effectively reduces the friction between the bearing surfaces and increases the service life of the fan bearings. Therefore, the radiator The service life is extended. The disadvantage is that the process is more complex, the cost increases, and it also brings higher working noise.
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