进口轴承的选择标准、存放、常见问题解决方案及进口轴承精度如何提高（Import bearing selection standards, storage, common problems, solutions and import bearings, how to improve the accuracy）.doc

进口轴承的选择标准、存放、常见问题解决方案及进口轴承精度如何提高（Import bearing selection standards, storage, common problems, solutions and import bearings, how to improve the accuracy） First, the selection of imported bearings should pay attention to the five standard elements 1, bearing radial load Bearings mainly subjected to radial loads are radial bearings. Nominal contact angle of such bearings a0=450. The same roller bearings can carry more radial loads than ball bearings. N and NU cylindrical roller bearings can only bear radial load, and other types of radial bearings can bear radial load as well as axial load. 2, the axial load of the bearing Bearings that are mainly subjected to axial loads are thrust bearings generally, and their nominal contact angles are a0450. Thrust bearings and thrust angular contact ball bearings can be subjected to axial force in one or two directions at the same time, depending on the structure. When subjected to stress is very high and the cylindrical roller thrust bearing and thrust roller bearings. Thrust roller bearings and thrust angular contact ball bearings can withstand axial load and radial load, thrust bearings can withstand axial load other. 3, the length of the bearing itself compensation A structure that supports a shaft and bearing and is usually constructed of fixed bearings and movable bearings. The length error and thermal expansion of the compensating shaft of the traveling bearing. NU and N cylindrical roller bearings are ideal floating bearings, which can compensate the length of the bearings themselves. The inner and outer rings of the bearing can be tightly matched. 4 、 length compensation of slide fit Can not be separated from the bearing (such as deep groove ball bearings and roller bearings) can also be used for traveling bearing. Of these bearings, one of the two rings is fitted with an axial fixed surface. Therefore, a ferrule of the bearing can be moved on its supporting surface. 5. Separable bearings (accuracy) It is a kind of bear