LOCKING DEVICE FOR WIND TURBINES

摘要

The invention relates to a locking device for the rotor of a wind turbine having one or more rotor blades which rotor rotates about a substantially horizontal rotor shaft under wind loads. The rotor shaft is supported on a main frame in a nacelle and transfers the rotation of the rotor shaft either directly or by means of an intermediately connected gearbox to a generator which converts the rotation to electrical energy. For safety reasons it is absolutely necessary that the rotor and thus all rotating parts can be fastened with respect to the nacelle by means of a form fit connection to prevent further rotation. Common to the known solutions is that the known solutions propose to stop the rotor in a certain position in which a through hole and a pin are aligned with each other and thus the pin can engage in the through hole. In order to ensure the highest capacity force transmission possible and secure and play free fastening of the rotor with respect to the nacelle a pin and a through hole of the locking disk are designed to be substantially corresponding in the respective cross sectional shapes and cross sectional dimensions thereof and are to be arranged in such a way that the cross sectional shapes have the same orientation. If the cross sectional shapes deviate from each other the force transmission occurs only at points which leads to increased loading of the components in particular in the area of the respective force application but also beyond the area of the respective force application by means of the stress distribution and as a result to reduced durability or increased requirements for material dimensioning and processing and thus increased costs. An aim of the invention is to provide a locking device that avoids the disadvantages of the prior art and in particular that ensures reliable and substantially unhindered insertion of the pin into the through holes of the disk wherein play between the pin and the through hole is reduced. Said aim is achieved by a locking device according to claim 1 in that adjustment means are provided between the locking pin and the rotor shaft so as to be effective in the radial direction whereby the distance of the locking pin relative to the rotor axle can be adjusted at least in the radial direction.