Four-point Contact Ball Slewing Bearing
1.Reasons and solutions for abnormal noise of excavator slewing bearing
In construction, excavators often appear. Not only is its crawler not afraid of some potholes, but also because the excavator can turn left and right, it is very convenient to dig holes and fill soil, but with long-term use, There will be various problems in the slewing bearing of the excavator, most of which are various abnormal noises.
1. The installation surface is uneven, and the installed screws are loose
When abnormal noise occurs, it is necessary to first determine whether the installation is not flat enough to meet the requirements of the machine, so that there is a gap in the raceway, which leads to abnormal noise;
in addition, when the pinion engagement process is not tight enough In addition, when the bolts fixing the slewing bearing are loose, it will also cause the elastic deformation of the slewing ring bearing to produce a gap. At this time, it is necessary to check immediately and tighten the bolts as required. .
2. There is a foreign body inside the slewing bearing
When the inside of the slewing ring bearing enters foreign objects such as gravel and iron foam, there will not only be a strange vibration sound at this time, but also the problem of jamming in the direction of rotation.
Therefore, if we want to avoid this from happening, we not only have to clean the bearings and matching parts before installation, but also remember to remove foreign matter in the lubricant in time; in addition, do not use impure materials to keep the frame, so that we can remove the corresponding abnormal noise.
3. Abnormal noise caused by grease problem
The slewing bearing of the excavator needs to be lubricated with grease, so the abnormal noise may also be caused by the lubrication problem. Among the more common reasons, there are problems such as lack of grease, uneven filling of grease, poor quality of grease, aging and wrong selection of lubricants.
Therefore, as long as we use suitable lubricants, fill in and replace new lubricants in time, we can avoid such abnormal noises.
4. Abnormal noise caused by damaged sealing strip
The structure of the sealing strip of the slewing bearing plays a key role in the sealing performance, so it is necessary to frequently check whether there is wear around the sealing strip, because when the sealing strip and the slewing bearing are not tightly fitted, it will cause grease.
The certificate leaks to the outside, resulting in abnormal noise. In addition, the aging resistance and butter resistance of the sealing strip material are also issues that we need to fully consider.
5. Abnormal noise caused by cracks, indentations or rust
If cracks, indentations or rust appear on the rolling surface of the slewing bearing, it will cause vibration of the slewing ring bearing, which in turn will cause noise. However, this noise will vary indefinitely with the installation and grease. Therefore, we must not knock the bearing or use high-viscosity grease during installation.
6. The raceway and rolling elements are severely worn
The reason for the abnormal noise in the slewing ring bearing of the excavator may also be due to the long-term use of the slewing ring bearing, the raceway and rolling elements have reached the service life, and severe wear has occurred, then the slewing bearing must be carried out at this time. Repaired.
