How to repair the worn bearing of the paper guide wheel of the drying cylinder
The paper guiding system is an important part of the paper making equipment, which is composed of the guiding rope, the guiding rope pulley and the transmission device. It is mainly used to guide the paper and transfer the paper strip to the next working area, and is an important system that affects the output of the paper machine. The bearing position of the paper guide wheel of the drying cylinder of an enterprise was worn during its operation. The shaft of the paper guide wheel moved outward during its operation, but the paper guide rope was stuck between the paper guide wheel and the drying cylinder shaft, resulting in the failure of the paper guide system. The shaft diameter was 300mm, the unilateral wear was 2.5-3mm, and the bearing was 61860 (double disc). According to past experience, many equipment management personnel will choose to pad metal gaskets for repair after the bearing position of the paper guide wheel of the drying cylinder is worn. This requires adding appropriate copper metal gaskets according to the wear amount of the bearing position for emergency operation, which is relatively convenient to operate. However, when the copper gasket is impacted by heavy load, it will deform or deviate from the position, affecting the concentricity and thus aggravating the vibration of the equipment. This method can only be used as a short-term emergency measure; There are also many equipment managers who will choose to replace new parts for repair, which requires replacing the problem shaft according to the downtime, stock and value of the parts. This method is not only time-consuming and laborious, but also more important is to make a large number of spare parts in stock, which takes up a large amount of enterprise capital flow. In consideration of the repair cycle and the use effect after repair, Xiao Bian suggested that after the bearing of the paper guide wheel of the drying cylinder was worn, the Sorey technology should be used for repair. This technology can quickly repair online, reduce or avoid disassembly, significantly shorten the downtime of enterprises, and reduce the losses caused by sudden or major equipment problems; This technology is not an emergency treatment technology. Through the excellent performance of materials and targeted repair process, the original mating surface between the repaired surface and the bearing can be reached, and the interference size of the original design of the shaft can be restored at the same time. Therefore, better stress can be guaranteed. Under the condition that the bearing is properly lubricated and maintained, and the bearing does not appear ablation, its service life can reach or even exceed the service life of new components.
