Introduction of Thrust Roller Bearings

Thrust roller bearings are used to bear axial and radial combined loads dominated by axial loads, but the radial load must not exceed 55% of the axial load. Compared with other 

thrust roller bearings, this kind of bearing has a lower friction coefficient, higher speed and self-aligning performance. The rollers of the 29000 type bearing are asymmetrical 

spherical rollers, which can reduce the relative sliding between the rollers and the raceway during work, and the rollers are long, large in diameter, large in number and high in 

load capacity, and are usually lubricated with oil. In some low-speed cases, grease lubrication can be used. In the design and selection, it should be preferred; 80000 type 

thrust cylindrical roller bearings, 90000 type thrust tapered roller bearings and AXK type thrust needle roller bearings can bear unidirectional axial load, which is more axial 

than thrust ball bearings. The load capacity is much greater, and the rigidity is high, and the axial space is small.

Thrust cylindrical roller bearings and thrust needle roller bearings are suitable for occasions with low speed, and the speed of thrust tapered roller bearings is slightly higher than 

that of thrust cylindrical roller bearings. Thrust roller bearings are divided into thrust cylindrical roller bearings, thrust self-aligning roller bearings, thrust tapered roller bearings, 

thrust needle roller bearings. Thrust cylindrical roller bearings are mainly used in oil drilling rigs, iron and steel machinery. Thrust self-aligning Roller bearings are mainly used in 

hydraulic generators, vertical motors, propeller shafts for ships, tower cranes, extrusion machines, etc. Thrust tapered roller bearings are mainly used for: one-way: crane hooks, 

oil drilling rigs Ring. Two-way: rolling mill roll neck. Plane thrust bearing mainly bears axial load in the assembly, and it is widely used.

Although the installation and operation of thrust bearings is relatively simple, errors often occur during actual maintenance, that is, the installation positions of the tight ring and 

loose ring of the bearing are incorrect, resulting in the failure of the bearing and the rapid wear of the journal. The tight ring is installed on the end face of the stationary part, that 

is, it is incorrectly assembled. The inner ring of the tight ring and the journal are in a transitional fit. When the shaft rotates, the tight ring is driven and rubs against the end face 

of the stationary part. When the axial force (Fx) is applied, the friction torque will be greater than the matching resistance torque of the inner diameter, causing tight The mating 

surface of the ring and the shaft is forced to rotate, which aggravates the wear of the journal.