4 FAQs about Wind turbine generator set lubrication system

Which lubricant is used in wind turbines?

Oil change in mechanisms, engines, motors. Both grease and oil lubricants are used in wind-turbine systems; grease is the main lubricant in the pitch/yaw, generator, and shaft bearings, and formulated oil is in the gearbox. One of the challenges is to optimize grease formulation for such demanding conditions, particularly low-temperature operation.

How do you replicate grease lubrication conditions in wind turbine bearings?

To replicate grease lubrication conditions occurring in wind turbine bearings it is necessary to control a number of parameters, these include stroke length for fretting, temperature, and initial grease sample application. Liquid lubricant tribology tests are usually run with an excess of fluid present.

What type of Grease do wind turbine bearings use?

Greases used in wind turbine bearings typically use calcium or lithium-based thickeners with either mineral oil or synthetic hydrocarbon base oils. Several standard tests are used to assess grease fretting performance.

What is a rolling bearing in a wind turbine?

Rolling bearings in wind turbines are in the gearbox, shaft, pitch/blade, yaw, and generator systems, where they are often subject to extreme operating conditions of high loads, low temperatures, and variable wind speeds .

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