Bearings are designed for high temperature resistant materials
Bearing high temperature resistance is mainly reflected in two aspects, its own material and lubrication design.
1) Material design: There are many kinds of bearing steels with high temperature resistance materials, mainly their own materials and layers. This can be found in any data, such as silicon nitride, titanium carbide, etc.; materials generally require high hardness, and their own quality can not be too large.
2) The lubrication system of high-temperature bearings is generally a labyrinth sealing method.
3) The bearing clearance with high temperature resistance should have sufficient design clearance to prevent overload
A simple analysis, the diameter of the bearing wheel by 500 mm, I really don't know, a turn of 1.57 meters, the speed of the car according to 360 km / h, equivalent to 100 meters per second, the wheel speed of 100 / 1.57 * 60 rpm, That is, 3821.7 rpm, bearing size takes into account the bearing capacity and wheel size, the diameter will not be too large, the front answer someone said 200 mm, according to this specification, the speed of 3821.7 is fully adapted, there will be too high temperature, heat is caused by friction, the bearing in the case of lubrication, the friction coefficient is not very large, 0.02 or 0.004 as if, different bearings also have differences.
