The key characteristics of the MegaTorque Drivetrain Concept
The VerVent MegaTorque 20 drivetrain main benefits summary:
- Cost-effective fully modular and ‘easy’ scalable ‘ultra-high’ speed geared drivetrain with competitive ±145Nm/kg gearbox torque density level, minimized rotating elements and primary use of journal bearings.
- Drivetrain built around compact central structural element to which all other main drive components plus left and right gearbox housings are mounted.
- This innovative design approach enables largely independent scaling of the first left-side stepped or stepped gearbox part, the second right-side bevel-gear part, and third bevel-gear integrated planetary gearbox part.
- Modular design with vertical split between stepped and bevel gear parts, allowing easier more cost-effective assembly, disassembly, and up-tower repairs/component exchange without requiring jack-up deployment.
- Higher step-up ratios allow substantially reduced bevel gear unit dimensions, mass, and costs
- Achievable stepped gearbox part step-up ratio from about 1:15 (by minimized ring gear diameter being a major cost driver) up to 1:22…25.
- Fully modular drivetrain concept allows ongoing scaling to 20MW+ with matching 215 – 2XXm rotor sizes, and unparalleled flexibility in choosing optimal gearbox ratios and generator speeds for maximum LCOE performance.
- Patent-pending drivetrain solution effectively prevents non-torque loads originating from the load-carrying gearbox housings to enter and negatively impact functioning and lifetime of critical gearbox internals.
- Parts and bearing count comparable to a medium-speed geared drivetrain with two-stage planetary gearbox, whereby VerVent √ 20 comes with a much smaller lighter and cheaper conventional PMSG.
- Likely no additional components will be required for scaling the drivetrain between a 12 - 20MW range.
Key figures MegaTorque 20
Up to 6; from 12 - 20MW+ and 215 - 235m+ rotor reference design
At least 1:22 […25]
Mainly size and cost stepped gearbox ring gear
Minimized if any enabled by tool carrier principle and flanged component connections
Fully; ‘Left’ and ‘Right’ sides seen from central carrier; scaling up and downward
Based on current insight at least up to 24 – 26MNm
3x; left + right sides and central carrier
State-of-the-art for offshore; up-tower repairs enabled
Most bearing positions, except two ‘easy-to-access’ positions
±145Nm/kg and ~110T* for 12MW reference turbine with 16.3MNm input torque
Compact and competitive