What Is a Turbine Gearbox? | Lubripedia
A turbine gearbox is a mechanical drive system that adjusts the rotational speed of a turbine shaft to match that of the generator or driven equipment.
Because turbines typically operate at very high speeds, a gearbox is required to reduce or increase this speed for efficient and reliable power transmission.
Turbine gearboxes are commonly found in steam turbines, gas turbines, and wind turbines.
What does a Turbine Gearbox do?
The gearbox converts the high rotational speed of the turbine into a lower (or sometimes higher) speed suitable for the generator.
It does this using precision gear sets, which are designed to:
- Withstand high loads and rotational speeds
- Transmit torque efficiently
- Minimise vibration and noise
- Turbine gearboxes are high-precision components, built with tight tolerances and designed for continuous operation.
They require reliable lubrication and cooling to function properly.
Importance of Lubrication and Maintenance:
Proper lubrication is critical to the performance and longevity of a turbine gearbox.
Lubricating oil:
- Reduces friction between gear teeth and bearings
- Removes heat generated during operation
- Protects surfaces from wear and corrosion
- Suspends and carries away contaminants
Most turbine gearboxes use circulating oil systems with built-in filtration — often combined with offline (kidney loop) filtration — to maintain oil cleanliness and prevent failure.
Typical Applications:
- Steam turbines in power generation
- Gas turbines in industrial or aviation use
- Wind turbines for renewable energy
- Compressors and industrial drive systems