There are also related introductions on how to choose the brand and type of bearings. However, some common sense about bearings that are relatively biased, or often overlooked or ignored, often play a very important role in the use of bearings. Let me help you Popular science.
1. What is the life of the bearing?
For a single bearing, the number of revolutions of one ring or rolling element material before fatigue expansion occurs for the first time is called the life of the bearing. Due to differences in manufacturing accuracy and material homogeneity, even the same material, the same size and the same batch of bearings produced under exactly the same conditions will have very different life spans.
2. What are the main failure modes of rolling bearings?
Mainly include: pitting corrosion, plastic deformation, abrasive wear, adhesive wear, rust, bearing burns, etc.
3. What is the basic rating life of the bearing?
According to the number of revolutions (in millions of revolutions) or working hours before pitting damage occurs in 10% of the bearings in a group of bearings, and 90% of the bearings do not undergo pitting damage, the life of the bearing is regarded as this life. It is called the basic rating life and is represented by L10.
4. What is the basic dynamic load rating of the bearing?
When the basic rating life of the bearing is exactly one million revolutions, the load value that the bearing can withstand is called the basic dynamic load rating of the bearing and is represented by C. For radial bearings, it refers to pure radial load, expressed by Cr; for thrust bearings, it refers to pure axial load, expressed by Ca.
5. What is the equivalent dynamic load of the bearing?
If the rolling bearing bears the combined radial and axial load at the same time, in order to calculate the bearing life under the same conditions, the actual load must be converted into an equivalent dynamic load consistent with the load condition for determining the basic dynamic load rating. , Represented by P.
6.Why do rolling bearings need to perform static load calculations?
The static load refers to the load acting on the bearing when the relative speed of the bearing ring is zero or the relative speed is extremely low. In order to limit the excessive contact stress and permanent deformation of rolling bearings under static load, static load calculations are required.
Post time: Jan-19-2021