Shaft sleeve is a cylindrical mechanical part on the shaft, which is an integral part of sliding bearing. Generally speaking, the shaft sleeve and the bearing seat adopt interference fit, and the shaft adopts clearance fit.
Common breakdown causes
During the long-term operation of the shaft sleeve, the journal surface will be subjected to the extrusion force of the expansion sleeve and the composite mechanical force, which will lead to permanent deformation, and the diameter will be reduced by 0.1 mm ~ 0.3 mm. Then, the mechanical expansion force can not reach the required tightening force, and the fit gap between the sleeve and the spindle appears, which causes the wear of the sleeve.
Latest repair methods
Due to the high value of components, traditional repair methods are more expensive. With the development of foreign advanced technologies such as polymer composites, some repair methods with fast repair and low cost are favored. This method has also been introduced into China, and the more mature material is fushelan 2211f. The maximum compressive strength of the material can reach 1200 kg / cm2, and the adhesive force (overlapping shear tensile test) is 225 kg / cm2 on the smooth steel surface. So it can be used to repair the wear of large shaft sleeve. And the equipment does not need large-scale disassembly, saving a lot of manpower and material resources for the enterprise.
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