Tapered Roller Bearings Classification
Tapered roller bearings are separable bearings, and the inner and outer rings of the bearing have conical rollers. The bearings are divided into single column, double row and four-row taper roller bearing, etc. Single row cone roller bearing can withstand radial load and single direction axial load. When the bearing is subjected to the radial load, it will produce an axial component, so it is necessary to balance the bearing with the other axial force.
Structural characteristics of
The type code of taper roller bearing is 30000, and tapered roller bearings are separated type bearings. In general, especially in the GB/T307.1-94 "rolling bearing centripetal bearing tolerance" involved in within the scope of the size of the tapered roller bearing outer ring and inner components is gm's one hundred percent can be used interchangeably.
The Angle of the outer ring and the diameter of the outer raceway have been standardized with the same dimensions. It is not allowed to change during design and manufacture. The outer ring of the cone roller bearing can be interchangeable with the internal components in a world wide range.
Tapered roller bearings are mainly used for radial and axial combined load mainly for radial load. Compared with angular contact ball bearing, the bearing capacity is large and the limit speed is low. The cone roller bearing can withstand the axial load of one direction, which can limit the axial displacement of the shaft or the shell in one direction.
A single row cone roller bearing has an outer ring, an inner ring and a group of conical rollers that are made from a basket shape to an inner ring assembly. Outer ring and inner ring component separation, in accordance with ISO standard taper roller bearing dimension, any standard type of tapered roller bearing outer ring and inner ring components should be able to and the same outer or inner ring component implementation international swaps. The outer dimension of the same type of outer ring shall conform to the ISO492 (GB307) as specified in iso 492 (GB307), and the cone Angle of the inner ring component and the diameter of the cone of the assembly must also meet the relevant provisions of the exchange.
Usually, single row tapered roller bearing outer ring raceway of cone Angle between ° ~ 10 ° 19, able to withstand the axial load and radial load combination. The greater the cone Angle, the greater the ability to bear axial load. Big cone Angle of the bearing, post code to add B, Angle between 25 ° ~ 29 °, it can withstand large axial load. In addition, single row taper roller bearings can adjust the size of the clearance during installation.
The outer ring (or inner ring) of the double row cone roller bearings is a whole. The two inner circles (or outer circles) have similar small ends, and there is a circle in the center. The clearance is adjusted by the thickness of the ring, and the thickness of the ring can be used to adjust the preying of the double row taper roller bearing.
Four row circular cone roller bearings, the bearing performance and double row circular cone roller bearings basic same, but the than double row tapered roller bearing radial load is bigger, limit rotational speed is a bit low, mainly used in heavy machinery.
Multi-seal double, four-row tapered roller bearing, ZWZ provides long life, multi-seal double, four-row tapered roller bearing. To personalized new design of bearing, change the sealed bearing with traditional design method, by adopting the combination of sealing and dustproof new type sealing structure, improve the sealing effect, improve the sealing performance. The life span of multi-seal double, four-row taper roller bearing is 20% ~ 40% compared with open-structure bearing. Reduce lubricant consumption by 80%.
Adjust the axial clearance for the installation of the tapered roller bearing axial clearance, available on the journal of adjusting nut, adjusting shim and bearing hole of the thread, or use the methods of preloaded spring to adjust. The size of the axial clearance is related to the arrangement of the bearing installation, the distance between the bearings and the material of the shaft bearing seat, which can be determined according to working conditions.
For high load high speed circular cone roller bearings, adjust clearance, must consider the effect of temperature on the axial clearance, clearance reduction is estimated, will cause the temperature rise, that is to say, the axial clearance to properly adjust a bit bigger.
For bearings with low speed and vibration bearing, no clearance installation shall be taken, or pre-load mounting shall be applied. The purpose of this paper is to make the roller and roller of the taper roller bearing good contact, distribute the load evenly and prevent the vibration of roller and raceway from being destroyed. After adjustment, the size of the axial clearance is tested with a micrometer