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Technical Product Information | 2012-04
Planetary Gear Bearing Arrangements in Industrial Gearboxes
Technical Principles Products and Applications

 
 
PRESS

Enhanced performance in wind turbine gearboxes with bearing and system expertise

Schaeffler at EWEA 2015 in Hall P02-3

 
INTERACTIVE ANIMATION
Wind Power - Interactive Animation

Find information about Schaeffler products and services for rotor shafts, gearboxes, generators, wind tracking and blade adjustments.

"Wind Power" - interactive animation

 

Wind Tracking and Blade Adjustment

Long-term maneuverability

Wind turbines must be aligned optimally to the wind in order to prevent extreme loads and allow cost-effective operation. Wind turbines adjust automatically due to active systems with azimuth drives and gearboxes.

 
 
 
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  AZIMUTH DRIVE / PITCH DRIVE
Azimuth drive / pitch drive

Schaeffler offers bearing supports for slewing drives for nacelle and blade angle adjustment from one source.

Challenges for the bearing support:

  • High loads
  • Oscillating motion
  • Vibration
 

Input shaft

 
FAG deep groove ball bearing
FAG deep groove ball bearing

Advantages

  • Higher speeds
  • Reduced heat generation
  • Lower energy consumption/increased efficiency
  • Lower overall costs
 

Planet gear

 
FAG cylindrical roller bearing RN (direct bearing support), INA full complement cylindrical roller bearing RSL (direct bearing support), INA double-row full complement cylindrical roller bearing RSL (direct bearing support)
FAG cylindrical roller bearing RN (direct bearing support), INA full complement cylindrical roller bearing RSL (direct bearing support), INA double-row full complement cylindrical roller bearing RSL (direct bearing support)

Advantages

  • Simple to mount on the planet gear
  • Cost-effective overall solution
  • Compact solution with optimized mass facilitates downsizing
  • High radial load carrying capacity
  • Suitable for higher accelerations
    (FAG cylindrical roller bearing RN)
  • High power density
    (INA cylindrical roller bearing RSL)

Features

  • Cylindrical roller bearing with cage without outer ring
  • Raceway is integrated in the planet gear
  • Reinforcement of planet stud by enlarged radius on one side of the bearing
 

Output shaft

 
Output shaft
FAG cylindrical roller bearing, FAG spherical roller bearing, FAG tapered roller bearing

FAG cylindrical roller bearing – Advantages

  • Non-locating bearings with displacement within the bearing
  • High radial load carrying capacity
  • Simplified mounting and dismounting due to separability of the cage bearings

FAG spherical roller bearing – Advantages

  • Can be used as locating and non-locating bearings
  • Optimized internal bearing design for high demands
  • Angular adjustment facility

FAG tapered roller bearing – Advantages

  • Narrow guidance of shafts due to clearance-free setting
  • High bearing rigidity due to large support base of pressure cones
  • Suitable for high radial and axial loads
 
 
  HYDRAULIC BLADE ADJUSTMENT
INA spherical plain bearing
INA spherical plain bearing
 
INA plain bush
INA plain bush
 
 

Advantages

  • Long operating life
  • High load carrying capacity
  • Absolutely maintenance-free due to ELGOGLIDE
  • Protected against contamination
  • Corrosion protection with Corrotect

Features

  • ELGOGLIDE sliding layer
  • Sealed on both sides