How to repair and adjust bridge crane gnawing rail

Rail gnawing by bridge cranes is a serious problem. The main reasons for rail gnawing are track problems, wheel problems, and bridge deformation. When the bridge crane has a rail gnawing problem, it may reduce the service life of the wheels, wear the track, generate vibration, and even cause the danger of derailment. Therefore, when the bridge crane has the problem of gnawing the rail, we must adjust and repair it in time. The editor of our factory will share with you the adjustment method of the bridge crane gnawing track.

1.  The gnawing of the wheel of the cart may also cause the bridge frame to deform due to transportation or installation and lifting, which causes the horizontal deflection, vertical deflection, and diagonal deviation of the cart to be too large. Therefore, the bridge should first be rectified to make it meet the technical requirements, otherwise the problem cannot be solved fundamentally.
2.  When the bridge frame and the transmission mechanism basically meet the technical requirements, or the bridge frame is deformed but not large, adjusting the wheels can solve the problem. Sometimes adjusting a wheel can simultaneously solve the problems of horizontal deflection, vertical deflection, span and diagonal over-tolerance of the wheel. Therefore, check and analyze to determine which wheel can be adjusted to minimize the workload. Special attention should be paid to the fact that because the driving wheel is connected with the transmission mechanism, the workload of adjusting the driving wheel is relatively large, which is likely to cause the transmission mechanism to be out of focus. Therefore, it is better to adjust the driven wheel unless necessary.
   1.  Regarding the adjustment of horizontal deflection, it can be seen from Fig. 6 and Fig. 7 that if the deflection amount of the three wheels A, C and D meet the regulations, only adjust the deflection direction of wheel B. All four wheels are adjusted.
   2.  Regarding the adjustment of the vertical deflection of the wheels, the sides of the two wheels should be skewed outwards at no load (Figure 8). When the lifting load gradually increases, the wheels just tend to receive vertical force.
3.  Before adjusting the wheel, first use a jack to jack up the end beam to hang the wheel in the air, then loosen the fastening bolts, and then adjust.
   1.  For slight adjustment, after loosening the fastening bolts, pad the groove of the angular bearing box.
   2.  The amount that needs to be adjusted is large. Shovel the positioning key plate and add pad adjustment between the key plate and the end beam bent plate, as shown in Figure 9. To adjust the horizontal deflection, padding should be added at the vertical key board. To adjust the vertical deflection, padding should be added to the horizontal key board.
   3.  When adjusting the span and diagonal difference, all four key plates of a wheel should be shoveled, and after adjustment, the positioning key plate should be welded to the end beam bending plate.
4.  If the speed of the motors on both sides is not the same, replace the motors with the same model and the same manufacturer.
5.  Adjust the brakes when the brakes on both sides are not coordinated.
6.  Overhaul or replace couplings and gearboxes with large gaps in the transmission mechanism.
7.  Turning or replacement of wheels with different diameters on both sides; the installation direction of the tapered wheels is wrongly adjusted to the top of the cone to the outside.
8.  If there is a problem with the track, check and adjust according to the track installation requirements; clean up the debris on the track.

In short, there are various situations in which the wheels of crane carts gnaw, and the reasons are different. In actual work, to solve the problem of gnaws, we must carefully analyze and find out the cause in order to prescribe the right remedy and achieve a multiplier effect. The above discussion on the problem of the wheel running of the crane cart is improper. Please my colleagues will hesitate to correct me. Thank you.

If you are not sure whether your crane is gnawing the rail, you can refer to the article: How to judge whether the bridge crane is gnawing the rail , there is a more detailed explanation.

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