Solar tracker must have smooth, slow and sturdy motion. The tracker should possess high position accuracy and high degree of reliability. These requirements can be attained by specially designed drivers known as slewing drivers.
It is advised to mount the slewing drives upside down on the azimuth axis in solar applications for better protection and add protection for the elevation axis. For other applications, the mounting directions shall be based on the evaluation of the protection level and it shall be better for better protection.
It is advised to mount the slewing drives referring to attached drawing upside in solar applications for better protection. For other applications, the mounting directions shall be based on the evaluation of the protection level and it shall be better for better protection.
1. By adopting slewing bearing as its core component, slewing drive can bear axial force, radial force and tilting moment simultaneously.
2. Slewing drive is widely applied in modular trailers, all types of cranes, aerial working platform, solar tracking systems and wind power systems.
SE7 Slewing Bearing: Technical Overview & Application Guide
I. Product Overview
TheSE7 slewing bearingis ahigh-capacity, heavy-duty turntable bearingoptimized forextreme load conditions, large-scale machinery, and harsh environments. It features atriple-row roller design(axial + radial + tilting moment support),integrated gearing, andadvanced sealing systems, making it suitable for applications likeoffshore cranes, mining shovels, and large wind turbines.
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II. Core Parameters & Performance
【表格】
Specification Technical Details Explanation
Bearing Type Triple-row Roller (Axial/Radial/Moment) Combines axial, radial, and tilting moment support in one unit.
Outer Diameter (D) 1000–5000 mm (customizable) Designed for large-scale equipment (e.g., ship cranes, excavators).
Bore Diameter (d) 500–3000 mm Matches heavy-duty shafts and gearboxes.
Height (H) 150–500 mm Thicker design for enhanced load distribution.
Dynamic Load Rating 5000–50,000 kN (axial/radial) Handles ultra-heavy cyclic loads (e.g., mining shovels).
Static Load Rating 10,000–100,000 kN (axial/radial) Supports massive stationary loads (e.g., offshore platforms).
Gear Type External/Internal Gear (Module 8–20) External gear for high-torque drive systems; internal for compactness.
Sealing System Triple-lip metal seals + labyrinth Prevents saltwater/debris ingress (IP68 optional).
Lubrication Method Oil circulation (centralized system) Required for high-speed/temperature applications (up to 200°C).
Material 42CrMo4/50CrV4 alloy steel High-strength, heat-treated steel for extreme durability.
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III. Technical Features & Advantages
1. Triple-Row Roller Design for Ultimate Load Capacity
• Axial rowhandles vertical loads (e.g., lifting weights).
• Radial rowsupports horizontal forces (e.g., wind gusts).
• Tilting moment rowresists overturning torque (e.g., ship crane tilting).
2. Enhanced Stiffness & Minimal Deformation
• Preloaded racewaysreduce clearance under load.
• Optimized roller spacingprevents edge loading.
3. Advanced Sealing & Corrosion Protection
• Triple-lip metal seals+labyrinth channelsblock water/debris.
• Corrosion-resistant coatings(e.g., zinc-nickel plating) for offshore use.
4. High-Speed & High-Temperature Capability
• Oil-lubricated channelsdissipate heat (up to 200°C).
• Low-friction roller pathsreduce energy loss.
5. Modular Customization for Specialized Needs
• Gear module, pitch diameter, and sealing typeadjustable per application.
• Explosion-proof(ATEX-certified) models for hazardous environments.
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IV. Typical Applications
1. Offshore & Marine Engineering
• Ship cranes, jack-up platforms, and floating wind turbinesfor 360° rotation under waves.
• Subsea drilling rigs(corrosion-resistant, high-pressure models).
2. Mining & Heavy Construction
• Bucket-wheel excavators, draglines, and stackersfor ultra-heavy material handling.
• Tunnel boring machines (TBMs)for underground drilling.
3. Wind Energy & Renewables
• Large-scale offshore wind turbines (≥10 MW)for yaw/pitch systems.
• Tidal/wave energy generatorsfor continuous rotation in harsh seas.
4. Aerospace & Defense
• Satellite launch pads, missile launchers, and radar systemsfor precise positioning.
• Military cranes(armored, shock-resistant models).
5. Industrial Machinery
• Steel mills, cement plants, and paper millsfor heavy-duty rotary tables.
• Nuclear reactor coolant pumps(high-radiation, low-maintenance models).
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V. Selection & Customization Recommendations
1. Load Capacity Matching
• For≤20,000 kN dynamic loads, chooseSE7-R1(triple-row roller, external gear).
• For≥30,000 kN dynamic loads, selectSE7-R2(enhanced preload, internal gear).
2. Environmental Adaptability
• Offshore applications: Usezinc-nickel-coated bearingswithIP68 seals.
• High-temperature environments (≥150°C): Opt foroil-lubricated models with ceramic rollers.
3. Gear Integration
• External gearfor direct drive from hydraulic motors (e.g., mining shovels).
• Internal gearfor enclosed, debris-free systems (e.g., nuclear reactors).
4. Mounting Type
• Four-point contact(axial/radial loads) for cranes/wind turbines.
• Crossed roller(high stiffness) for robotics/CNC machines.
3. Electric and planetary gearboxes can be designed according to customer's requirement.
4. Slewing drive has the advantage of saving space in facilities, max load capacity in a compact design, extensive lifespan, reduced maintenance costs, etc.
