Abstract: A wind turbine condition monitoring method includes the steps of generating in advance a reference curve for normal operation of a transmission chain of a wind turbine using position information, measuring position information and generating an actual condition monitoring curve; comparing the actual condition monitoring curve with the reference curve, and determining the current condition of the wind turbine from the comparison. With the proposed monitoring method, monitoring with a high signal-to-noise ratio can be achieved with minimal or no addition of hardware, such as an ND module; moreover, computational task is greatly reduced, so that the monitoring system can be more easily integrated into the main control system. In addition, the position measurement system is more stable than a vibration measurement system, and the monitoring result is more reliable.

Abstract: A drive system for a wind turbine includes at least one planetary gear stage, connectable to a rotor shaft of the wind turbine and including a sun gear engaging with multiple planetary gears, a driven hollow shaft connected to the sun gear, a pitch tube having a generator-side end with a centering shoulder, and a face side provided with threaded holes, the pitch tube being arranged concentrically to the annulus gear and extending axially over the entirety of the planetary stage, an adapter element having an opening for receiving a generator add-on component, the adapter element being received on and radially surrounding the generator side end and fixed in position radially and axially in one direction by the centering shoulder, and screw-type connection fittings extending axially through the adapter element and being received in the threaded holes of the pitch tube for securing the adapter element to the pitch tube.

Abstract: The invention relates to a gear mechanism comprising at least one drive shaft and at least one output shaft, which enter a gear mechanism housing through a respective opening. The drive shaft and/or the output shaft comprise a magnetically or optically coded section in the region of the respective opening. The coding in said section may be changed by the effect of a torque or a force on the drive shaft or output shaft. Moreover, at least one gear wheel connected to the drive shaft and at least one gear wheel connected to the output shaft are provided that are directly or indirectly engaged with one another. In addition, the gear mechanism according to the invention comprises at least one scanning unit for detecting the magnetic or optical coding of the drive shaft or output shaft in a contact free fashion.

Abstract: A gearbox includes an input shaft connected to a rotor hub, an output shaft connected to a generator, and a first gear wheel rotation-locked to the input shaft and arranged inside a gearbox housing. A second gear wheel arranged inside the gearbox housing and meshing with the first gear wheel or coupled thereto via one or more additional gear wheels is rotation-locked to the output shaft. A flange radially surrounds the input shaft and/or the output shaft and has a circumferential groove on a side facing the input shaft and/or output shaft. An annular tubular sealing element made from an elastic material is fixed in the circumferential groove and can be expanded by an increase in the internal pressure. An intermediate space between the input shaft and/or output shaft and the circumferential groove is thus completely sealed by the sealing element when expanded.

Abstract: A planetary gear mechanism for a wind power plant includes a sun gear, an internal gear and a planetary carrier with planetary gears supported by radial and axial slide bearings. The radial slide bearings include a sleeve made of a slide bearing material and attached as an inner ring to a planetary gear shaft or mounted as an outer ring in a bore in a planetary gear. An outer bearing ring cooperating with the inner ring is formed by the bore in the planetary gear, or an inner bearing ring cooperating with the outer ring is formed by the planetary gear shaft. A slide bearing material of a first bearing element of the axial slide bearings is applied between a planetary carrier cheek and an end side of a planetary gear. The end side of the planetary gear or the planetary carrier cheek forms a corresponding cooperating second bearing element.

Abstract: A wind energy plant has a rotor with a rotor hub mounted on a pod and a plurality of rotor blades adjustable by corresponding electrical drives. An electrical generator is connected to the rotor for supplying energy to electrical loads arranged in the rotor hub. A primary part of a rotary transformer arranged concentric to a rotor bearing is connected to the pod and a secondary part of the rotary transformer is arranged in the rotor hub and co-rotates with the rotor hub. A first frequency converter is connected between the primary part and a supply voltage source for generating a high-frequency field voltage from a low-frequency supply voltage, and a second frequency converter is connected between the secondary part and the electrical loads for generating a low-frequency load voltage from a transformed high-frequency field voltage.

Abstract: Torque can be detected in a transmission by using at least one vibration sensor to detect at least one vibration signal which is associated with a tooth engagement frequency of intermeshing transmission toothings, and the phase shift of which is dependent on at least one tooth engagement duration of the intermeshing transmission toothings. The tooth engagement duration is torque-dependent as a result of toothing deformations. A torque acting on the transmission is determined from the phase shift of the detected vibration signal and/or of the at least one tooth engagement duration.

Abstract: A first planet stage of an epicyclic gearbox revolves in a gearbox housing and includes a planet support having two interconnected side pieces. Planet gears are borne in the planet support via planet gear bearings and engage a central sun gear shaft and a hollow gear secured to the gearbox housing. A first channel has one end connected to an oil supply in communication with an oil feed pump and passes through a gearbox housing wall, and another end connected via second channels, passing through one side piece of the planet support, to third and fourth channels, passing through the shafts of the planet gears and open to the planet gear bearings. The first channel passes through an insertion apparatus secured in the gearbox housing and.

Abstract: A wind power plant transmission with at least one transmission stage which comprises at least a first and a second gearwheel, wherein a third gearwheel is provided which is connected axially to and is centered on the first or second gearwheels. At least the first, second and third gearwheels are encompassed by a transmission housing. Flange-mounted on the transmission housing is an auxiliary drive, where the torque of the auxiliary drive can be transmitted to the third gearwheel by a fourth gearwheel which is movable axially along, and can rotate with, a driveshaft which is driven by a motor. In an activated state of the auxiliary drive, the third gearwheel is in engagement with the fourth gearwheel. By omitting a front-mounted gearing and thereby reducing the number of individual parts, it is possible for a wind power plant transmission to be obtained in a more cost-effective and more compact manner.

Abstract: A first planet stage of an epicyclic gearbox revolves in a gearbox housing and includes a planet support having two interconnected side pieces. Planet gears are borne in the planet support via planet gear bearings and engage a central sun gear shaft and a hollow gear secured to the gearbox housing. A first channel has one end connected to an oil supply in communication with an oil feed pump and passes through a gearbox housing wall, and another end connected via second channels, passing through one side piece of the planet support, to third and fourth channels, passing through the shafts of the planet gears and open to the planet gear bearings. The first channel passes through an insertion apparatus secured in the gearbox housing and.

Abstract: A gear drive apparatus for converting a rotational input provided by a drive device, such as a wind power generator rotor, into a predetermined rotational output for driving rotation of a driven device, such as a generator, includes a large gear coupled to the drive device and a pair of output pinion shafts coupled to the driven device. A first gear level includes eight primary level pinion shafts each having gear teeth meshingly engaged with the outer circumferential gear teeth of the first large gear. The eight primary level gear or pinions are coaxially secured to the eight primary level pinion shafts for driving rotation thereof. Four secondary level gears and four secondary level pinion shafts form a secondary gear level which rotates the pair of output pinion shafts.

Abstract: A gear drive apparatus for converting a rotational input provided by a drive device, such as a wind power generator rotor, into a predetermined rotational output for driving rotation of a driven device, such as a generator, includes a large gear coupled to the drive device and a pair of output pinion shafts coupled to the driven device. A first gear level includes eight primary level pinion shafts each having gear teeth meshingly engaged with the outer circumferential gear teeth of the first large gear. The eight primary level gear or pinions are coaxially secured to the eight primary level pinion shafts for driving rotation thereof. Four secondary level gears and four secondary level pinion shafts form a secondary gear level which rotates the pair of output pinion shafts.

Abstract: Transmission for a wind-power plant with blades (3) distributed around a rotor (1) and with a generator (6) mounted by way of an azimuth bearing (7) on a mast (27). The transmission is a two-stage planetary transmission with an input stage and an output stage, and the input stage is directly connected to the rotor. The input stage (4) is provided with double-helical cogs and the output stage (5) with single-helically cogged planet wheels.