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High Vibration Loads

Generators in wind turbines are subject to high vibration loads. This additional permanent load has a negative influence on the cages and places strain on the lubricant.

  • High speeds
  • High temperatures
  • High vibration loads
  • Risk of the passage of current
Generator
Generator

Prevention of Damage due to Current Passage

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Animation: Bearing damage due to the passage of current

Damage due to the passage of electrical current

Current passage causes serious bearing damage and thus leads to premature, unexpected failure of a motor or generator:

  • Craters caused by melting
  • Molten droplets
  • False brinelling
  • Discoloration
  • Micro-wear
  • Premature aging of the lubricant
  • Noticeable noise behavior

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Animation: Longer operating life due to current insulation

Longer operating life due to current insulation

Current-insulating bearings prevent damage due to the passage of electrical current and thus ensure lower maintenance costs and higher machine availability.

All current-insulating bearings have the same dimensions and load carrying capacities as those without insulation, which makes them perfectly interchangeable.

INSUTECT A

Current-insulating cylindrical roller bearing
Current-insulating cylindrical roller bearing
Advantages
  • Highly wear-resistant insulating layer
  • Breakdown voltage up to 5,000 volts DC
  • Also suitable for damp environments
  • Good conductor of heat
  • Interchangeable with standard bearings
Features
  • Aluminum oxide ceramic layer
  • Different coating types are available for optimum functional performance

Hybrid Bearings

Current-insulating hybrid bearing
Current-insulating hybrid bearing
Advantages
  • Maximum protection against passage of electrical current
  • Low wear in the rolling contact
  • Longer bearing and grease operating life
  • Suitable for high speeds
  • Good emergency running characteristics
  • Rolling elements are resistant to chemicals
  • Interchangeable with standard bearings
Features
  • Hybrid bearing
  • Ceramic rolling elements
  • Same dimensions as standard bearings
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