Four reasons for the broken teeth of excavator slewing bearing

In the daily use of the excavator, if there is abnormal sound of the rotary device, difficult rotation, broken teeth of the rotary table and other phenomena, please do not continue to use it. It should be stopped to check and analyze the reasons. Here we focus on analyzing several reasons for the broken teeth of the large ring of the rotary support:

• The phenomenon of broken teeth of the slewing support is directly related to the early installation. The improper backlash of the gear adjustment during installation fails to meet the requirements, resulting in the improper pharyngeal closure of the two gears during operation, resulting in broken teeth.
• Fail to adjust the meshing gap between the gear jump and the pinion as required, resulting in the jamming of the pinion and the big gear at the maximum position of the gear jump during operation, resulting in broken teeth. The slewing bearing gear and the pinion should be adjusted in meshing, and the test run should be carried out after the adjustment as required.
• The axes of the large and small gears are not parallel, and the large and small gears are not engaged properly after installation, resulting in broken teeth. The axes of the two gears should be parallel.
• Slewing bearing mounting bolts are not fixed tightly, and the large and small gears are not engaged properly, resulting in broken teeth. Bolts should be tightened as required.