Core Technical Advantages of Xiangli Precision Engineering’s Self-aligning Roller Bearings
1. Optimised Structural Design
Double-row symmetrical roller structure: The outer ring features a shared spherical raceway, whilst the inner ring has a double-raceway, inclined design, providing significant self-aligning capability to accommodate shaft deflection or installation errors.
High-precision raceway machining: Super-finishing technology reduces the coefficient of friction, enhances lubrication efficiency, and lowers operating temperatures by 10–15°C.
Clearance Control Technology: Optimised C3/C4 clearance groups compensate for thermal expansion and prevent overheating caused by excessive preload.
2. Materials and Heat Treatment Processes
Surface Carburising and Hardening: Roller surface hardness reaches HRC ≥60, whilst core toughness is enhanced, increasing impact resistance by 40%.
Bainitic Quenching: Suitable for humid environments, with corrosion resistance doubled and service life extended by 50%.
Special Cage Materials:
Machined Brass Cages: Suitable for severe vibration conditions (e.g. vibrating screens), with strength increased by 30%.
Tough Copper Cages: Resistant to high-frequency impacts (e.g. jaw crushers), reducing the risk of cage fracture.
3. Sealing and Lubrication Systems
Labyrinth seal + positive pressure air seal: Prevents dust ingress; following retrofitting at a cement plant, bearing service life increased from 1.5 years to 3 years.
Outer ring annular oil groove design: Supports forced lubrication, reduces operating temperature by 20°C, suitable for high-temperature kiln machine support rollers.
Quick-change structure: Set-screw or withdrawal sleeve design, reduces disassembly and assembly time by 70%, minimising unplanned downtime.
Typical Applications and Solutions
1. Vertical Mill Systems
Application Areas: Mill rollers, gearboxes, classifier spindles.
Solutions:
Carburised self-aligning roller bearings: Withstand crushing forces and vibration impacts, doubling service life.
Smart Monitoring System: Integrated vibration sensors provide real-time early-failure alerts, reducing unplanned downtime.
Case Study: Following an upgrade at a cement plant, vertical mill capacity increased by 15%, and bearing replacement intervals were extended from 2 to 4 years.
2. Rotary Kiln Systems
Application Areas: Support rollers, ring support bearings.
Solutions:
Bearings with inner ring oil holes: Forced lubrication lowers operating temperatures, making them suitable for high-temperature environments.
High-temperature cages: Machined brass cages (suitable for temperatures ≤200°C) prevent deformation at high temperatures.
Case Study: Following the retrofit of support roller bearings at a group’s kiln machinery facility, annual downtime was reduced by 40% and maintenance costs were cut by 2.2 million yuan.
3. Roll Press System
Application: Roll press bearings.
Solutions:
Surface hardening treatment: Enhances roller fatigue resistance, suitable for high-impact loads.
Quick-change design: Sleeve-type structure reduces disassembly time from 8 hours to 2 hours.
Case Study: Following an upgrade to the roll press bearings at a cement plant, annual replacement frequency dropped from 12 to 3 times, with production capacity increasing by 10%.
4. Crusher System
Application: Moving cone of jaw crushers.
Solutions:
Four-row cylindrical roller + self-aligning roller bearing combination: 50% increase in load capacity, suitable for frequent start-stop impacts.
Vibration monitoring module: Real-time feedback on bearing condition; predictive maintenance reduces sudden failures.
Case Study: Following the retrofit of crusher bearings at a mining enterprise, the failure rate fell by 60% and annual maintenance costs were reduced by 85%.
