How to solve the problem of large gap between the top ring and bottom ring of the excavator slewing bearing?

Excavator is an indispensable mechanical device in the construction of today’s engineering equipment. Powerful robotic arms and buckets can excavate the earth and then load it into the transport vehicle. This series of operations are inseparable from the working device of the excavator. The important joint in the working device is the slewing bearing. The quality of the slewing bearing directly affects the normal operation of the excavator. During the daily use of the excavator, sometimes there is a problem that the upper ring and lower ring gaps of the excavator turntable are large, or the bearing is stuck and damaged. How can we use the maintenance to solve these problems?

First, the reason and solution for the large gap between the top ring and bottom ring of the excavator slewing bearing

The reason for the large gap between the upper ring and lower ring sides of the excavator is that the lack of grease lubrication causes the rollers to become smaller when the wear is worn, the butter leaks out, and further causes wear, and then the excavator slewing bearing has a problem of large gap between upper ring and bottom ring. That is, the excavator turntable is disassembled, and then repaired, the roller is replaced and repaired, and the repaired excavator slewing bearing should be replaced in time.

Second, the other problems of the excavator slewing bearing and the maintenance

1. Teeth are broken

Broken tooth is another common problem of excavator slewing bearing. It should be stopped in time after the broken tooth, and repair and replacement should be carried out in time. The broken teeth of the excavator slewing bearing are mostly due to improper adjustment of the side gear of the large and small gears during installation, which does not meet the requirements. Causes the two gears to be misaligned during operation, causing broken teeth; or the meshing gap adjustment between the pinion and the pinion is not required as required, causing the pinion to become stuck when the meshing gear is engaged with the large gear toothing position during operation; The non-parallel axes and the slewing bearing mounting bolts are not tightly fixed, so that the large and small gears are poorly engaged and the teeth are broken.

The excavator slewing bearing should be repaired in time after the broken teeth appear. If it is repaired by the maintenance personnel, it must be replaced in time. In order to avoid the occurrence of broken teeth, maintenance should be carried out when the installation is used. The following points should be made: the backlash should be adjusted strictly according to the requirements; the meshing adjustment should be carried out with the small gear in the position where the green paint is applied, and the test should be carried out according to the requirements. Operation ensures that the two gear axes are parallel; tighten the bolts as required; operate in strict accordance with the operating procedures; ensure that the size gears are clean and check frequently.

2. Abnormal sound

The abnormal sound is also one of the common problems of excavator slewing bearings. Abnormal noise is an abnormal sound. It will have a certain sound when it comes to new products. It is normal, but it should be replaced in time when it lasts for a long time. Sometimes it is installed after installation. There will also be abnormal noise. In this case, it is necessary to check whether the installation is correct. The abnormal noise generated during the use may be the lack of grease in the raceway or the foreign matter mixed in the raceway. When the noise occurs, it is necessary to check the excavation in time. Whether the various structures of the slewing bearing are complete, and the fault is eliminated.

The above is the analysis of how to solve the problem of the upper ring and lower ring clearance of the excavator turntable. For the excavator slewing bearing, there will be many problems in the process of use, such as large gap, broken teeth or abnormal noise. These problems should be repaired or replaced in time. If you can’t solve them yourself, you must contact the manufacturer in time to provide professional guidance to avoid direct damage.