In the replacement of crane wheels to be selected in accordance with the provisions, then how to choose it? There are several tips to provide reference when replacing the wheel selection.
1.The longer the track, the poorer the straightness, the more likely to produce "wear track". Therefore, the wheel tread width should be wider than the width of the track.
2.To prevent the crane from derailment, the wheel rim height should be: 25-30mm for double rim wheels; 20-25mm for single rim wheels.
3.Centralized drive of the large span crane active wheels generally use conical wheels, passive wheels using cylindrical wheels, to a certain extent, can automatically correct the amount of crane deflection when running to prevent the crane to go tilt.
4.In order to reduce the wear of the wheel rim and extend the service life of the wheel, the rimless wheel can be used with the horizontal guide wheel to guide the operation of the horizontal wheel instead of rim-guided operation, which can change the sliding friction between the wheel rim and the side of the track to rolling friction between the horizontal wheel and the side of the track, reducing the running resistance and improving the life of the wheel.
5.Conical wheels are generally used on the running mechanism with two active wheels and two passive wheels.
6.The size of the wheel diameter depends on the size of the wheel pressure load (wheel pressure on the track),and the wheel pressure load is limited by the bearing capacity of the track foundation. When the crane is running on the track supported by sleepers, generally the permissible wheel pressure load is 100-120kN; when running on the track supported by concrete foundation or steel structure directly, the permissible wheel pressure load can reach 600kN.
When the lifting capacity is slightly larger, the wheel pressure load can be reduced by increasing the wheel diameter.
When the lifting capacity is larger, the wheel pressure load is usually reduced by increasing the wheel diameter. In order to make the wheel pressure load of each wheel evenly distributed, take the even (balance) beam type support device.
For large cranes with a particularly large number of wheels, in order to shorten the arrangement length of the wheels, a double-track rail can be used.
7.Trolley running mechanism of the two active wheels wheel pressure load to be slightly greater than the wheel pressure load of the two passive wheels.
At the same time, the following taboos need to be noted when replacement overhead crane wheels:
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