What are the three key transmission stages of Wind Turbine Gearbox?

Wind turbine gearboxes convert low-speed rotor rotation into high-speed generator input. A failure can result in significant downtime costs. Understanding these complex components isn't just a technical learning curve; it's crucial for maximizing the return on investment for wind farms. As a leading OEM, Raydafon designs every gearbox subcomponent to meet the highest standards for durability, precision, and efficiency. A modern wind turbine gearbox integrates three key transmission stages into a single system. Their respective functions and key components are listed below.

1. Planetary Gear Stage

Function:

Handles the high input torque (up to 6 MN·m) from the rotor shaft at speeds of 6-20 RPM.

Key Components:

Sun Gear: Transmits torque to the sun gear of three to five planetary gears.

Planet Gears: Rotate around the sun gear mounted on the planet carrier.

Ring Gear: A fixed external gear with internal teeth.

Planet Carrier: Connects the planetary gears to the intermediate shaft.

2. Intermediate Parallel Shaft Stage

Function: Uses helical gears to increase the speed by 10-15 times. Key Components:

Input Pinion: Driven by the planetary gear carrier.

Intermediate Gear: Transmits motion to the high-speed stage.

Shaft: High-strength alloy steel, fatigue-resistant design.

Bearings: Precision angular contact bearings.

3. High-Speed Stage

Function: Increases the generator's final speed to 1,500-1,800 RPM.

Key Components:

Output Pinion: Connects to the generator coupling.

Lubrication System: Jet and splash lubrication.

Cooling Circuit: Oil-to-air heat exchanger.

Wind Turbine Gearbox Critical Supporting Systems: