Shield machine

The diameter of the slewing bearing of the shield machine ranges from 2.5 meters to 6 meters, and some have larger diameters. This type of bearing works under very harsh conditions. The bearing carries a large load, has strong corrosion resistance, and has a short lifespan.

盾构机是盾构施工方法中的主要施工机械，必须具备高可靠性，能够稳定可靠地运行。大型盾构机的主轴承大多采用三列滚柱回转轴承。在工作过程中，它们需要承受较大的轴向力、倾覆力矩以及一定的径向力。载荷条件复杂，容易产生较大的变形，从而影响盾构机的施工安全。

Slewing bearing includes an upper ring and a lower ring. The upper ring is connected to the lower ring through bolts to form an outer ring structure. The gear ring is located in the inner ring structure. There is a boss on the side of the gear ring. There is a boss between the boss and the upper ring. The upper raceway has an upper row of rollers in the middle. There is a lower raceway between the bottom of the boss and the lower ring. There is a lower row of rollers in the lower raceway. There is a row of rollers between the side of the boss and the outer ring structure. There are radial raceways with radial rollers in the middle. Double sealing rings are connected to the inner edge of the upper ring and the gear ring. There is a lower sealing belt connected to the bottom of the gear ring. The bearing capacity of each rolling element of the three rows of rollers is clearly divided. The upper and lower rows of rollers carry a load of 90°, giving full play to the load-bearing capacity of each load-bearing roller. Therefore, it has a large load-bearing capacity of axial force, radial force and overturning moment, meeting the requirements It meets the 360° requirements for slewing bearings of engineering machinery, especially cranes, stackers, ladle slewing tables, etc.