Common fault causes:

 

In the long-term operation process of the shaft sleeve, the surface of the journal is subjected to the extrusion pressure of the expansion sleeve and the action of composite mechanical force, which will lead to its permanent deformation, and the diameter can be reduced by 0.1mm~0.3mm. Thus, the mechanical expansion and matching strength can not reach the required tightening force, and there is a matching gap between the shaft sleeve and the spindle, causing the wear of the shaft sleeve.

 

Latest Fixes:

 

Due to the high value of components, traditional repair methods are expensive. With the development of advanced technologies such as foreign polymer composites, some repair methods with rapid repair and low cost are favored. This method has also been introduced in China, and the more mature Fushi blue 2211F material, etc.

 

The material has the incomparable comprehensive mechanical properties, excellent bonding force and temperature and corrosion resistance of traditional methods, the maximum compressive strength can reach 1200kg/cm2, and the adhesion (overlapping shear tensile test) on the smooth steel surface is 225 kg/cm2. So can be used for large parts of the shaft sleeve wear repair. And the equipment does not need extensive disassembly