What should I do if the single girder crane wheel is damaged?

single girder crane wheel

The single girder crane wheel belongs to the open gear transmission, that is, there is a set of ring gears on the outside of the wheel, which meshes with the output gear of the reducer. Because the working environment and lubrication conditions of open gears are very poor, a large part of the wheel damage of single-beam cranes occurs on the gears.

Common damages to outer ring gears include broken teeth, excessive wear of gear teeth, cracks in gears, and peeling of gear tooth surfaces beyond the allowable range. The reasons for the above-mentioned failures are mainly that the single-girder crane is not running smoothly, and it produces large shocks and vibrations during work; the installation accuracy of the wheels is not enough, resulting in poor gear meshing; the heat treatment of the gears is not good enough, and the surface hardness is not up to standard. To solve this kind of problem, first of all, check the installation accuracy of the wheel and the meshing condition of the large and small gears. After eliminating the above two reasons, replace the damaged gear, and the surface hardness of the replaced gear should be tested. You can also add a frequency conversion drive to the drive mechanism to reduce the impact of starting and braking and prolong the life of the wheelset.

In addition to gear failures, there are other problems such as wheel rim wear, bearing damage, shaft damage, etc. For wheel rim damage, check whether the crane has rail gnawing. Bearing damage is generally caused by the selection of a small bearing or the quality of the bearing itself. Shaft damage and The heat treatment of the shaft is related to the installation accuracy. In short, first, find out the cause of the failure and solve it, and then replace the corresponding parts. If it is because the design selection is small, it is necessary to consider replacing other product models with high load-carrying capacity, such as changing ball bearings to roller bearings, changing ordinary carbon steel shafts to alloy materials, etc.