A gear arrangement, in particular for a rotary connection of a wind turbine, comprising a first gear, a second gear in engagement with the first gear, wherein in the engaged position a gap space is provided between a first tooth and a second tooth of the first gear and a tooth of the second gear, and a sealing element which seals off the gap space to prevent lubricant escape.

A slew drive includes a housing, a worm shaft having a worm thread carried within the housing for rotational movement and a torque tube having an outer surface. The torque tube is carried by the housing for rotational movement perpendicularly to the worm shaft and worm thread. A ring gear section having teeth is carried by the torque tube with the teeth engaging the worm threads. An inner raceway is fabricated as an integral part of the torque tube. An outer raceway is fabricated as an integral part of the housing, the outer raceway radially overlying the inner raceway, and bearing elements captured between the inner raceway and the outer raceway.

A gear system includes a carrier having a first portion and a separate, second portion and a plurality of pin shafts extending from the first portion of the carrier. Each of the plurality of pin shafts includes a first end and a second end. As such, the first ends are integrally formed with the first portion of the carrier. The first and second portions are arranged on opposing sides of the plurality of pin shafts and are spaced apart such that the first and second portions do not contact each other. Further, the second portion of the carrier defines an end plate that is secured to the second ends of the plurality of pin shafts. The gear system also includes a plurality of gears mounted to the plurality of pin shafts, with each of the plurality of gears arranged so as to rotate around one of the plurality of pin shafts.

A planetary transmission includes at least two planetary stages. A sun shaft of a planetary stage of the at least two planetary stages is connected for transmission of torque via a coupling toothing system to a planetary carrier of a second transmission stage of the at least two planetary stages that follows the first transmission stage. The coupling toothing system is a flat notch toothing system. A drive train of a wind power plant, in which a corresponding planetary transmission is used as transmission, is also provided. A wind power plant that is equipped with a corresponding drive train is provided. An industrial application that has a corresponding planetary transmission as transmission is also provided.

A housing component includes a flange defining a center point and having an end face formed with microstructures in a first region and a second region to increase a local friction coefficient. The microstructures have each a blade shape with a cutting line, the cutting line in the first region being arranged concentrically about a first local center point, and the cutting line in the second region being arranged concentrically about a second local center point. The first and second local center points have different radial distances from the center point of the flange.

A method of identifying a fault in a system of gears in a wind turbine is provided. The method determines two or more centre harmonic frequency amplitudes according to vibrations of the system of gears and determines a plurality of sideband amplitudes of each of the centre harmonic frequency amplitudes. Further, the method sums the centre harmonic frequency amplitudes to calculate a total centre harmonic frequency amplitude and sums each of the sideband amplitudes of the centre harmonic frequency amplitudes to calculate a total sideband amplitude. The method then determines a value indicative of damage incurred by the system of gears based upon the first centre harmonic frequency amplitude and the average sideband amplitude.

A flight simulator having a wind tunnel with a vertical flight chamber and a second vertical chamber communicatively coupled thereto via air flow conduits. A nacelle disposed within the second vertical chamber includes a fan and a ratio gearbox connected to the fan. A motor is disposed remote from the nacelle for powering the fan via a jackshaft and the ratio gearbox. A variable frequency drive responsive to a control signal from a programmable logic controller regulates the speed of the motor.

A gearbox repair assembly is disclosed herein. The gearbox repair assembly includes a sleeve having an inner diameter configured to receive a bearing assembly and an outer diameter configured to fit within a bore of a gearbox housing. The gearbox housing can be part of a gearbox of a wind turbine. The gearbox repair assembly further includes a retaining plate configured to be attached to the gearbox housing for preventing an outer race of the bearing assembly from rotating in the bore relative to the gearbox housing. Also provided are methods to repair such a gearbox. The gearbox repair assembly and related methods reduce the time and cost needed to repair the gearboxes.

A wind turbine transmission including a first planetary stage and a second planetary stage, wherein a sun gear of the first planetary stage and a planet carrier of the second planetary stage are interconnected for conjoint rotation by means of a spline joint, the sun gear integrally forms an internal toothing, and a first web of the planet carrier or a sun shaft integrally connected to the first web integrally forms an external toothing of the spline joint.

A planetary gearbox for a wind turbine has a planetary gearbox housing, at least one sun gear, at least one internal gear, a planetary carrier with a first planet carrier cheek and a second planet carrier cheek, at least one planetary gear bolt, which is accommodated in the planetary carrier, at least one planetary gear, which is mounted on the planetary gear bolt, and at least one planetary gear radial sliding bearing which comprises a sliding surface. An oil distribution channel section is formed at least in the first planet carrier cheek. The first planet carrier cheek is mounted in the planetary gearbox housing by a radial sliding bearing. The radial sliding bearing is simultaneously formed as a flow connection element for flow connection of the oil distribution channel section of the first planet carrier cheek to a first lubricating oil supply bore arranged in the planetary gearbox housing.