Abstract: A wind power installation with an azimuth bearing having an azimuth gearing, and at least one azimuth drive, which is coupled to an azimuth gear mechanism corresponding to the azimuth gearing. The azimuth gear mechanism has a drive pinion which is rotatable about a pinion axis, wherein the drive pinion is configured to engage in the corresponding azimuth gearing of the azimuth bearing, wherein the pinion axis has a predefined reference orientation. The wind power installation comprises at least one sensor device which is configured to detect a deviation of the orientation of the pinion axis relative to the reference orientation.

Abstract: The disclosure concerns a wind power installation with an azimuth bearing having an azimuth gearing, and at least one azimuth drive, which is coupled to an azimuth gear mechanism corresponding to the azimuth gearing, wherein the azimuth gear mechanism has a drive pinion which is rotatable about a pinion axis, wherein the drive pinion is configured to engage in the corresponding azimuth gearing of the azimuth bearing, wherein the pinion axis has a predefined reference orientation. The disclosure proposes that the wind power installation comprises at least one sensor device which is configured to detect a deviation of the orientation of the pinion axis relative to the reference orientation.

Abstract: Wind energy plant with an aeration equipment for a rotor hub, with a cup-shaped element which has a bottom and a circumferential side wall, and a pipe-shaped connection piece, directed into an inner space of the rotor hub, the cup-shaped element being kept in front of an entrance opening of the connection piece such that the entrance opening is arranged in the interior of the cup-shaped element.

Abstract: An apparatus for the lubrication of a roller bearing of a wind energy plant, with a container for lubricant having a chamber, which is divided into a chamber portion for fresh lubricant and a chamber portion for used lubricant through a movable piston, wherein each chamber portion is connected via a line to a lubricant channel passing through the roller bearing.

Abstract: Wind energy plant with an aeration equipment for a rotor hub, with a cup-shaped element which has a bottom and a circumferential side wall, and a pipe-shaped connection piece, directed into an inner space of the rotor hub, the cup-shaped element being kept in front of an entrance opening of the connection piece such that the entrance opening is arranged in the interior of the cup-shaped element.