Introduction
RENK AG has been developing gear units for large wind power stations since the early 1980s, achieving success with projects like the Njunäsudden plant. Their expertise led to the AEROGEAR series, designed to address common gear transmission issues with durability and efficiency.

Development of AEROGEAR
The AEROGEAR series features a step-stage epicyclic gear unit design, which achieves higher gear ratios with fewer components. This design enhances power transmission efficiency, reduces noise and wear, and minimizes power loss. The gear units are pressure-lubricated to prevent bearing failure due to insufficient oil supply.

Design and Maintenance
The AEROGEAR casing is designed for easy disassembly and maintenance without special tools. RENK emphasizes the importance of clean oil supply and consistent lubrication to prolong bearing life. Plain bearings are preferred for high-load applications due to their durability and cost-effectiveness.

Quality Assurance
RENK uses the DALOG data recording system for prototype testing to ensure gear units meet operational demands. This system monitors torque, speed, and vibrations, providing insights into gear unit performance and reliability.

Warranty and Service
RENK offers a warranty of up to 36 months, with longer periods available under observation contracts. Maintenance and operation conditions are crucial for long-term guarantees, with inspections conducted by experienced RENK personnel.

Strategic Goals
RENK aims to provide gear units that match the reliability and efficiency of direct-drive systems, focusing on technology and efficiency rather than cost, ensuring a high return on investment through superior performance and energy gains.

Conclusion
RENK's strategy in the wind power market is to deliver high-quality gear units that prioritize reliability, noise reduction, and efficiency, ensuring long-term benefits for wind energy operators.

Development and Testing
The AEROGEAR prototype was installed at the Grömitz wind park, equipped with a RENK DALOG system for real-time data acquisition, including torque, lubrication, and vibration metrics, allowing continuous monitoring and optimization.

Inspection and Maintenance
RENK conducted thorough inspections of all components, demonstrating the ability to disassemble and reassemble the gear unit at a height of 65 meters within five days. Inspections after 18 months showed all parts in excellent condition.

Advantages and Future Developments
The AEROGEAR concept ensures long-term, problem-free operation of wind power stations, with easy part replacement at significant heights. Orders for units up to 2,000 kW have been placed, and development for larger power ratings, including a 5 MW gear unit, is ongoing.

Contact Information
RENK AG, Industrial Gear Division, Gögginger Str. 73, 86159 Augsburg. Tel: ++49 821 / 5 70 05 15, Fax: ++49 821 / 5 70 04 60, Email: [email protected]