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Application of Excavator Bearings
The following are the key application scenarios and technical highlights of excavator bearings, which are explained in combination with the equipment structure and working condition requirements:
I. Application of Core Component Bearings
1. Youdaoplaceholder0 rotary platform
Youdaoplaceholder0 Bearing type : slewing bearing (outer diameter up to 2.5 meters)
Youdaoplaceholder0 function :
Support the 360° rotation of the upper body to bear the overall weight of the machine and the overturning moment during operation
To resist the combined torsional force (radial + axial load) during excavation, the anti-deformation capacity needs to reach the thousand-ton level
Youdaoplaceholder0 Special design : Three-row roller structure enhances rigidity, and the sealing system adopts multi-layer lip seals (suffix 2RS) to prevent soil intrusion
2. Youdaoplaceholder0 walking mechanism
Youdaoplaceholder0 Bearing type : tapered roller bearing (Series 3)
Youdaoplaceholder0 function :
The hub area bears the impact load of the tracks and the vibration of ground jolts
The gear shaft of the transmission needs to synchronously transmit torque and deceleration power
Youdaoplaceholder0 Protection requirements : Surface carburizing treatment increases hardness (60-62 HRC), and the sealing cover is designed to prevent mud and water, extending service life by more than three times
3. The hinge point of the working device
Youdaoplaceholder0 Bearing type : self-aligning roller bearing (22/23 series)
Youdaoplaceholder0 function :
Compensation structure deformation at the connection between the boom and the bucket rod (±2.5° deviation allowed)
When the bucket is digging, it bears the impact load of the ore, and its ability to resist fretting wear needs to be ≥8000 hours
Youdaoplaceholder0 Material innovation : rare earth steel rolling elements increase fatigue strength by 40 times, suitable for high-impact working conditions
Ii. Key Points for Design under Special Working Conditions
Youdaoplaceholder0 anti-pollution seal
The slewing bearing adopts double protection of labyrinth seal + rubber lip seal, and the dust-proof efficiency reaches 99%
Youdaoplaceholder0 extreme temperature adaptation
The bearings of the hydraulic system use high-temperature grease (with a temperature resistance of ≥150℃) to prevent lubrication failure
Youdaoplaceholder0 anti-fatigue strengthening
The carburizing and quenching process makes the hardness gradient of the raceway smooth and delays spalling failure
Iii. Maintenance and Selection Specifications
Youdaoplaceholder0 installation accuracy :
The flatness error of the slewing bearing installation shall be ≤0.2mm/m, and local overload shall be prevented
Youdaoplaceholder0 lubrication management :
The hinge point bearing should be greased every 500 hours, with the filling amount being 1/3 to 1/2 of the cavity (excessive filling will cause heating)
Youdaoplaceholder0 Fault warning :
The integrated temperature sensor conducts real-time monitoring. An alarm is triggered when the temperature rise exceeds 70℃
v
Application of Excavator Bearings
The following are the key application scenarios and technical highlights of excavator bearings, which are explained in combination with the equipment structure and working condition requirements:
I. Application of Core Component Bearings
1. Youdaoplaceholder0 rotary platform
Youdaoplaceholder0 Bearing type : slewing bearing (outer diameter up to 2.5 meters)
Youdaoplaceholder0 function :
Support the 360° rotation of the upper body to bear the overall weight of the machine and the overturning moment during operation
To resist the combined torsional force (radial + axial load) during excavation, the anti-deformation capacity needs to reach the thousand-ton level
Youdaoplaceholder0 Special design : Three-row roller structure enhances rigidity, and the sealing system adopts multi-layer lip seals (suffix 2RS) to prevent soil intrusion
2. Youdaoplaceholder0 walking mechanism
Youdaoplaceholder0 Bearing type : tapered roller bearing (Series 3)
Youdaoplaceholder0 function :
The hub area bears the impact load of the tracks and the vibration of ground jolts
The gear shaft of the transmission needs to synchronously transmit torque and deceleration power
Youdaoplaceholder0 Protection requirements : Surface carburizing treatment increases hardness (60-62 HRC), and the sealing cover is designed to prevent mud and water, extending service life by more than three times
3. The hinge point of the working device
Youdaoplaceholder0 Bearing type : self-aligning roller bearing (22/23 series)
Youdaoplaceholder0 function :
Compensation structure deformation at the connection between the boom and the bucket rod (±2.5° deviation allowed)
When the bucket is digging, it bears the impact load of the ore, and its ability to resist fretting wear needs to be ≥8000 hours
Youdaoplaceholder0 Material innovation : rare earth steel rolling elements increase fatigue strength by 40 times, suitable for high-impact working conditions
Ii. Key Points for Design under Special Working Conditions
Youdaoplaceholder0 anti-pollution seal
The slewing bearing adopts double protection of labyrinth seal + rubber lip seal, and the dust-proof efficiency reaches 99%
Youdaoplaceholder0 extreme temperature adaptation
The bearings of the hydraulic system use high-temperature grease (with a temperature resistance of ≥150℃) to prevent lubrication failure
Youdaoplaceholder0 anti-fatigue strengthening
The carburizing and quenching process makes the hardness gradient of the raceway smooth and delays spalling failure
Iii. Maintenance and Selection Specifications
Youdaoplaceholder0 installation accuracy :
The flatness error of the slewing bearing installation shall be ≤0.2mm/m, and local overload shall be prevented
Youdaoplaceholder0 lubrication management :
The hinge point bearing should be greased every 500 hours, with the filling amount being 1/3 to 1/2 of the cavity (excessive filling will cause heating)
Youdaoplaceholder0 Fault warning :
The integrated temperature sensor conducts real-time monitoring. An alarm is triggered when the temperature rise exceeds 70℃
