Excavator slewing platform accessories are key components for the excavator's slewing function. The following is a detailed introduction to excavator slewing platform accessory products:

I. Slewing Platform Structure
The slewing platform is the foundation of the entire slewing section of the excavator. Various mechanisms and equipment are installed on it, such as lifting mechanisms, slewing mechanisms, double-foot support bases, electrical cooling devices, air pressure control systems, electrical equipment, and engine sheds, etc. The slewing platform is supported on the annular roller track of the crawler walking part by cylindrical rollers and connected to the walking part by a central pivot.

II. Main Accessory Types
Slewing Bearing Device:
Function: Provides support, supporting the turntable on the fixed part (lower chassis), preventing tipping, and ensuring smooth and easy slewing.
Types: Rolling bearing type slewing bearing and slewing column type slewing bearing. The rolling bearing type slewing bearing is essentially a large-diameter rolling bearing. Commonly used structures include single-row ball type and double-row ball type.
Slewing Drive Device:
Function: Drives the turntable to slew.
Composition: Generally consists of a slewing hydraulic motor, a planetary reducer, and a slewing drive pinion, etc. Through the meshing transmission of the drive pinion and the inner gear ring, the slewing drive device rotates around the inner gear ring while self-rotating, thereby driving the platform to rotate 360°.
Center Slewing Joint:
Function: Used to connect the hydraulic oil circuit between the travel control valve and the travel motor, ensuring the excavator's 360-degree rotation. Generally, there are two high-pressure hoses connecting the slewing joint to the left and right travel control valves, and two high-pressure oil pipes connecting to the left and right travel motors. In addition, the slewing joint also connects the travel speed pilot pipe and the travel motor return oil pipe.
Oil Seal Kit: The oil seal kit of the center slewing joint is a key component, such as the center slewing oil seal kit of Komatsu PC120-6, which mainly includes ROI oil seals, O-rings, etc. The oil seal kit of the center slewing joint may vary depending on the brand and model of the excavator.
Slewing Pinion and Large Gear Ring:
Function: The slewing pinion meshes with the gear ring on the inner seat ring of the slewing bearing. When the slewing mechanism is working, the pinion can rotate around its own axis and revolve around the center line of the turntable, thereby driving the entire slewing platform to rotate.
III. Accessory Characteristics and Requirements
High Strength and Wear Resistance: Slewing platform accessories need to withstand large loads and friction, so they must have high strength and wear resistance to ensure long-term stable operation.
Good Matching Accuracy: The matching accuracy between slewing platform accessories directly affects the slewing performance and stability of the excavator. Therefore, the dimensional accuracy and form and position tolerances need to be strictly controlled during manufacturing.
Reliable Sealing Performance: The hydraulic system and lubrication system in the slewing platform accessories require reliable sealing performance to prevent leakage and contamination.