Six things to prevent noise from excavator turntable bearings:

First, the mounting surface is uneven and the mounting bolts are loose

When abnormal noise occurs, is it due to the problem of installation operation? When the unevenness of the mounting surface fails to meet the requirements, a negative clearance will be formed on the raceway, which will cause abnormal noise. In addition, when the pinion meshes poorly, There may also be abnormal noise, which may cause broken teeth. In addition, when the mounting bolts are loose, the slewing bearing is elastically deformed, and a negative gap is generated at the deformed position. You need to immediately check and tighten the bolts as required.

Foreign bodies in the slewing bearing

When there are foreign objects such as sand and iron filings in the slewing bearing, aperiodic vibration will occur, and there will also be a failure of inflexible rotation. When encountering this situation, the bearings, shafts, seat holes and matching parts must be cleaned strictly before installation to remove foreign objects in the lubricant in time; remember to avoid using plastic cages with impure materials or embedded foreign objects, This will remove the corresponding abnormal noise.

Three, abnormal noise caused by grease problems

The slewing bearing of the excavator is lubricated with grease. The abnormal noise is most likely caused by lubrication problems. Common reasons are lack of grease in the raceway, uneven grease filling, poor grease quality and aging, and incorrect lubricant selection. If you want to solve this problem, you only need to use the proper lubricant, fill it in time, and change it in time.

Fourth, the abnormal sound caused by broken seals Check whether the seals are abraded, because the structure of the slewing bearing seals plays a key role in sealing. When the seals and the slewing bearings cannot be completely fitted, it is easy to cause grease leakage. In addition, the weathering material's aging resistance and butter resistance are also issues to be considered.

Five, abnormal noise caused by cracks, indentations or rust

When the rolling surface of the slewing bearing is cracked, indented or rusted, periodic vibrations like rivets are also heard. The scars will continuously occur on the channel, and the scars will appear on the steel ball from time to time. The noise varies with installation and lubrication conditions. The liberation method is not to knock the bearing or use high viscosity grease during installation.

Serious wear of raceways and rolling elements

The abnormal noise during the slewing of the excavator is likely to be caused by severe wear of the slewing bearing raceways and rolling elements. At this time, the slewing bearing needs to be repaired.

We all know that the working environment of excavators is relatively harsh, and the turntable bearings (slewing bearings) of excavators generally work under a large load. Squeaking noise of slewing bearings is a common problem. Do n’t worry, we just need to find out the correct reason and solve it in a targeted manner. The six precautions introduced by BENOY above are also aimed at the common phenomenon of noise in turntable bearings.