Writer: Eric Bearing Limited
Thrust roller bearings mainly bear the combined axial and radial load of axial load, but the radial load shall not exceed half of the axial load. Compared with other thrust roller bearings, the friction factor of this kind of bearing is relatively somewhat Low, the speed is relatively high, and has the performance of mobilization. It can reduce the relative sliding of rollers and raceways in work, and the rollers are long and large in diameter, the number of rollers is large, and the load capacity is high. Oil lubrication is usually used, and grease lubrication can be used in some low-speed conditions. When designing and selecting, it should be selected first; it can withstand one-way axial load, its axial load capacity is much greater than that of thrust ball bearings, and its rigidity is relatively large and the axial space is relatively small.
Installation method of thrust tapered roller bearing :
The size of the axial clearance of thrust tapered roller bearings has a certain relationship with the arrangement of the bearing, the distance between the bearings, and the material of the shaft and the bearing seat. It can be determined according to the working conditions. SKF 21313 E/C3 bearings online , pls click here :
For tapered roller bearings with high loads and high speeds, when adjusting the clearance between the bearings, the effect of temperature rise and fall on the axial clearance must be considered, and the amount of clearance reduction caused by the temperature rise and fall is estimated. In other words, the clearance between the bearings should be appropriately adjusted to be larger.
So for some bearings with low speed and vibration, we should adopt the installation without clearance, or install with preload. The purpose is to make the rollers and raceways of tapered roller bearings have relatively good contact, and the load is evenly distributed, and to prevent the rollers and raceways from being damaged by vibration and impact. After adjustment, the size of the axial clearance is checked with a dial gauge.
Thrust cylindrical roller bearings and thrust needle roller bearings are suitable for low speed occasions, thrust tapered roller bearings have a slightly higher speed than thrust cylindrical roller bearings. Thrust roller bearings are divided into thrust cylindrical roller bearings, thrust spherical roller bearings, thrust tapered roller bearings, thrust needle roller bearings and other thrust cylindrical roller bearings are mainly used in oil drilling rigs, iron and steel machinery, thrust self-aligning Roller bearings are mainly used in thrust tapered roller bearings such as hydroelectric generators, vertical motors, ship propeller shafts, tower cranes, extruders, etc. The main uses of these bearings: one-way crane hooks, oil drilling rig swivels, Bidirectional: Rolling mill roll necks and plane thrust bearings mainly bear axial loads in the assembly, and they are widely used. Although the installation and operation of thrust bearings are relatively simple, errors often occur during actual maintenance, that is, the installation positions of the tight and loose rings of the bearing are incorrect. As a result, the bearing loses its function and the journal is quickly worn. The tightening ring is installed on the end face of the stationary part, that is, wrong assembly. The inner ring of the tight ring and the journal are in transitional fit. When the shaft rotates, the tight ring is driven and friction occurs with the end surface of the stationary part.
When the axial force (Fx) is applied, the friction torque will be greater than the resistance torque of the inner diameter fit, resulting in tight Forced rotation of the mating surface of the ring and the shaft increases the wear of the journal.