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Including the radial position of IKO bearing and the axial position of IKO bearing, is the first problem to be considered. Generally, IKO bearing shafts mostly adopt double support structure. The radial position of the shaft is jointly limited by two supports. Each support shall have radial positioning radial or angular contact bearings. The axial position of IKO bearing can be limited by two supports in one direction and one support in two directions. In general, different axial positioning methods can obtain different operation accuracy. Therefore, when designing the supporting structure, the specific scheme of axial positioning should be selected according to the operation accuracy and working conditions of the shaft.
IKO bearing angular contact bearing and IKO bearing tapered roller bearing are often installed in pairs. IKO bearing angular contact bearings are installed in pairs in three arrangements. The opposite installation of the wide end faces of the outer rings of two IKO bearings is called back-to-back installation. The action points of the two supporting forces fall outside the supporting span. This arrangement is widely used because of its large support span, good rigidity when the shaft is cantilever, and the inner and outer rings tend to disengage when the shaft is heated and extended, so the shaft will not get stuck. However, if the preload installation is adopted, the preload will be reduced when the shaft is heated.
The relative installation of the narrow end faces of the outer rings of two IKO bearings is called face-to-face installation. The force action point of the two supports falls within the support span. This arrangement has the advantages of simple structure, convenient assembly, disassembly and commissioning, so it is also widely used. It is mainly used for short shafts and occasions with low temperature rise, but pay attention to reserve clearance. The axial clearance should not be too large, which will reduce the operation accuracy of the shaft.
When the axial load is large and multiple IKO bearings are required to bear at the same time, the series installation mode of wide and narrow outer ring of IKO bearing is often adopted. The force action points of each Swedish IKO bearing fall on the same side of the bearing, so it is called in-line arrangement, also known as series connection. When adopting this arrangement, pay attention to the structure and manufacturing to ensure that each IKO bearing can bear the load as evenly as possible.
The temperature of IKO bearing spindle or transmission shaft is higher than that of adjacent parts, so the shaft will heat up and stretch. In order to maintain the flexible rotation of the shaft, in the design of the supporting structure, while meeting the requirements of axial positioning accuracy, the requirements of free expansion of the shaft due to heating should also be considered. Axial positioning and axial expansion are corresponding.
The axial position of the shaft is adjusted to meet the special requirements of some meshing transmission. For example, in worm drive, the worm axis must fall in the middle plane of the worm gear to ensure its correct engagement, so it is required that the worm gear shaft can adjust its position axially. In bevel gear transmission, the pitch cone vertices of two IKO bearing bevel gears must coincide, so it is required that both IKO bearing bevel gear shafts can be adjusted axially.