Most of the reasons for the improper selection of Timken bearings are that when there is a large axial load, it is inappropriate to use only cylindrical roller bearings without cage instead of thrust bearings or bearing support structures that can bear large radial and axial combined loads. Poor bearing lubrication is the direct cause of bearing damage. This paper analyzes the current situation of damaged bearings. After the bearing has worked for 3000 hours, the rolling working surface of the bearing has no fatigue damage, and the bearing is only scratched. The bearing fatigue life calculated according to radial load is very long.
It is observed that the material structure at the bearing fracture is fine without coarse grains. The fracture is silver gray, belonging to brittle fracture. There is no obvious wear and material bonding burn in the inner raceway of the bearing, but there is obvious wear and scratch on one side of the inner ring retaining edge of the bearing. The main reason is that Timken bearing has visible cracks and blue materials in some areas on both sides of the main cracks on the side of the inner ring retaining edge. There is no abnormality on the side of the inner ring retaining edge of the bearing.
Usually Timken bearings can be installed in limited space. In most cases, the shaft diameter (or bearing inner diameter) is limited by mechanical design or other design. Therefore, the selection of bearing type and size is determined according to the inner diameter of the bearing. Therefore, the main dimension tables of standard bearings are prepared according to the international standard inner diameter dimensions.
According to the classification of bearings, the industries that may be used for bearings are analyzed. The key problem is to determine the key industries according to the actual situation of the company’s goods preparation. Bearing installation: the bearing must be installed under dry and clean environmental conditions. Before installation, carefully check the machining quality of the mating surface of the shaft and housing, the end face of the shoulder, the groove and the connecting surface. Timken bearings are relatively domestic bearings. Bearing not only represents strong brand support, advanced scientific concept and innovation, perfect after-sales service and strong product extension. Timken bearings are generally used for equipment with high speed and high accuracy, because it is necessary to ensure normal speed, high accuracy and reduce maintenance costs.