Thrust bearing set

The invention relates to a thrust bearing set. The thrust bearing set comprises at least four thrust bearings, which are arranged in series, and spacer assemblies; the spacer assemblies are arranged between any two adjacent thrust bearings; the spacer assemblies comprise outer spacers and inner spacers, the outer spacers and the inner spacers are the same in height, the outer spacers correspond to bearing outer rings of the thrust bearings, and the inner spacers correspond to bearing inner rings of the thrust bearings; when the bearing inner rings of the thrust bearings bear external axial force, the rigidity of the outer spacers is smaller than that of the inner spacers; and when the bearing outer rings of the thrust bearings bear the external axial force, the rigidity of the outer spacers is larger than that of the inner spacers. Due to the fact that one corresponding spacer assembly with the rigidity difference is additionally arranged between each two adjacent thrust bearings, the rigidity coefficient of