Actuating drive for adjusting the pitch angle of a rotor blade of a wind turbine, and wind turbine comprising such an actuating drive

US11473558B2 · kind B2 · utility

Assignee

• Liebherr-Components Biberach GmbH · DE

Inventors

• Martin Dahl · Flensburg, DE
• Stephan Kreiner · Ulm, DE
• Marcel Winkler · Mindelheim, DE
• Markus Schuster · Ann Arbor, US
• Christopher Fingerhut · Biberach an der Riß, DE
• Thomas Schulze · Rudolstadt, DE

Key dates

• Filing date: Sep 25, 2020
• Grant date: Oct 18, 2022
• Expiry date: Sep 25, 2040

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/72
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

In general, the invention relates to wind turbines, the rotor blades of which can be adjusted in terms of their pitch angle. The invention relates in particular to an actuating drive for adjusting the pitch angle of a rotor blade of a wind turbine, comprising a large rolling bearing which comprises two bearing rings that can be rotated relative to each other, and an actuator for rotating the two bearing rings relative to each other. According to the invention, the actuating drive comprises a ring channel cylinder, which is formed in one of the bearing rings, and at least one piston, which is received in the ring channel cylinder in a movable manner and is drivingly connected to the other bearing ring of the two bearing rings.