Large scale lifting equipment in ports, including shore container cranes, gantry cranes, gantry cranes, etc., are the main lifting equipment for port loading and unloading operations. With the continuous development of lifting machinery technology and the increasing requirements for various working conditions, as well as the increasing technical content of each link in the equipment, bearings, as the main component used to support fixed shafts and bear loads in machinery, play an obvious role.

If various types of bearings are not used, the various actions of the equipment will not be able to operate normally. Large cranes used in seaports will work under marine climate conditions with high salt mist, high humidity, and large temperature differences for a long time. Large cranes working in inland ports will also be affected by industrial atmosphere and harsh weather conditions; During the operation of large-scale equipment in ports, multiple actions are carried out simultaneously and multiple loads are superimposed simultaneously, all of which have a significant impact on the use of bearings.