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Working principle of thrust ball bearing

wallpapers Low Carbon 2021-05-08
Thrust ball bearing is a kind of separate bearing. The shaft ring and seat ring can be separated from cage and steel ball. The shaft ring is a ring matched with the shaft, and the seat ring is a ring matched with the bearing seat hole, and there is a gap between the shaft and the shaft; Thrust ball bearing can only bear axial load, one-way thrust ball bearing can only bear axial load in one direction, two-way thrust ball bearing can bear axial load in two directions; The thrust ball bearing can not limit the radial displacement of the shaft, the limit speed is very low, the one-way thrust ball bearing can limit the axial displacement of the shaft and the shell in one direction, and the two-way bearing can limit the axial displacement in two directions.
 
The thrust roller bearing is used to bear the axial and radial combined load, but the radial load shall not exceed 55% of the axial load. Compared with other thrust roller bearings, this kind of bearing has lower friction coefficient, higher speed and self-aligning performance. The rod of 29000 type bearing is an asymmetric spherical roller, which can reduce the relative sliding of roller and raceway in work. The roller is long and large in diameter, with a large number of rollers and high load capacity. Oil lubrication is usually used, and grease lubrication can be used in some low speed cases. Priority should be given in design and selection; 80000 type thrust cylindrical roller bearing, 90000 type thrust tapered roller bearing and AXK type thrust needle roller bearing can bear unidirectional axial load, which is much larger than the axial load capacity of thrust ball bearing, and has large rigidity and occupies less axial space. Thrust cylindrical roller bearings and thrust needle roller bearings are suitable for low speed applications. The speed of thrust tapered roller bearings is slightly higher than that of thrust cylindrical roller bearings.

Pay attention to the following points when installing thrust bearing.
 
(1) Distinguish the tight ring and loose ring of the bearing (according to the inner diameter of the bearing, the difference of the bore diameter is 0.1-0.5mm).
 
(2) Distinguish the static part of the mechanism (that is, the part that does not move, mainly refers to the assembly).
 
(3) In any case, the loose ring of the bearing should always rest on the end face of the stationary part.
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Tag: Ball   Thrust ball bearing   Bearing   Thrust