The alignment process difference of Raymond mill coupling does not meet the requirements, which will lead to dynamic and static imbalance of rotor, excessive vibration of Raymond mill bearing, wear and temperature rise of Raymond mill bearing. 

Solution: once the vibration of Raymond mill bearing is found, it is necessary to check the situation first. 

If the alignment process of coupling does not meet the standard, it is necessary to improve the alignment operation through technology; If the foundation is empty, stop the vehicle to improve the foundation problem and ensure that the foundation is filled; If the bearing is bent, replace the bearing in time.