Where does the hydraulic oil of the slewing ring of excavator ring out?
The structure of rotary joint is similar to the cylinder, the cylinder as a multi piston like Tomatoes on sticks, each layer has a seal. The two end caps also have seals.
The reason for this phenomenon is sheathed on the rotary vertical shaft seal damage (figure is marked with the red part), caused by oil hydraulic motor and reducer into rotary butter dish, and then from the back gear position of the hydraulic oil leakageIt is very good to know the principle of the motor. The position of the rotary motor and the reducer is hydraulic, while the lower gear and the gear ring are lubricated by butter
The equipment is typical of the hydraulic oil leakage after sealing damage, open the end cover, replace the O ring on it.
There are two cases, one of which is leaking from the central oil separator. That's for the oil seal. Take apart to see the shaft wear. If the shaft wears too much. To remove the plating. Otherwise, change the oil seal or not. Two, leaking from the gear oil. The skeleton oil seal that rotates the motor.
