A complete bearing arrangement involves not only bearings, but also other related components such as shafts and housings, all of which are a major part of the overall bearing system. In addition, lubricants and seals are also quite critical components. To fully exploit the performance of a bearing, it is necessary to use a suitable lubricant and an effective sealing system to prevent contaminants from entering the bearing. After years of verification, cleanliness has a major impact on the working life of the bearings. These are the main reasons why the standard bearing manufacturers have expanded their business to lubrication and sealing products many years ago. Today, Ms. will talk to you about the issues that should be paid attention to in bearing configuration.
Bearing configuration should pay attention to the problem to design an ideal bearing configuration, you need to do the following, of course, the motor bearing configuration is no exception. ● Choose the right bearing type. ● Determine the appropriate bearing size. ● Structure and design of other components in the configuration. ● Proper tolerance fit and clearance or preload of the bearing. ●The way to fix the bearing. ● Appropriate sealing system. ● Type and amount of lubricant. ●Installation and disassembly methods, etc.
Each of these factors affects the performance, reliability and cost effectiveness of the entire bearing arrangement. The time and effort involved in selecting a bearing depends on whether the user has experience with similar bearing configurations. In the absence of these experiences, special requirements for applications, or the cost of bearing configurations and other related factors that require detailed consideration, more detailed work must be done in the selection process, including more accurate calculations or tests. Wait.
When selecting the size of the bearing, the required bearing can be preliminarily determined according to the load acting on the bearing and the requirements for working life and reliability. The product table lists the basic dynamic load rating C and the basic static load rating Co. The conditions of bearing static load and dynamic load must be checked independently. When checking the dynamic load, the load spectrum that best meets the actual situation should be used for checking, including the maximum load that may occur. Static load not only refers to the bearing at rest or very low speed (n
Systematic methods for selecting bearings and bearing reliability The stresses considered in the bearing rating life equation include: stress caused by external forces, surface conditions, lubrication, and kinematically induced stresses of the rolling contact surfaces. By taking into account the effects of these stresses on bearing life, it is possible to make more accurate predictions of bearing performance and performance in specific applications.
In general, metal fatigue on rolling contact surfaces is the main cause of damage to rolling bearings. Therefore, for a particular application, it is sufficient to select the appropriate rolling bearing and its size based on raceway fatigue. The international standard IS0281 is based on the metal fatigue of rolling contact surfaces. But more importantly, the entire set of bearings should be treated as a system in which the components that may be present, namely the cage, the lubricant and the seal, whose life is equivalent to the durability of the bearing, and in some cases Play a leading role. In theory, when all components reach the same life, it is the ideal working life. That is to say, the actual working life of the bearing must reach the calculated life, and the working life of the component must also reach at least the calculated life of the bearing. Key components include cages, seals, and lubricants. In practical applications, metal fatigue is still the most important factor.
