WO2021167468A1 - Transmission for a wind turbine - Google Patents

Transmission for a wind turbine Download PDF

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Publication number
WO2021167468A1
WO2021167468A1 PCT/NO2021/050042 NO2021050042W WO2021167468A1 WO 2021167468 A1 WO2021167468 A1 WO 2021167468A1 NO 2021050042 W NO2021050042 W NO 2021050042W WO 2021167468 A1 WO2021167468 A1 WO 2021167468A1
Authority
WO
WIPO (PCT)
Prior art keywords
gear
planetary
shaft
bearing
wind turbine
Prior art date
Application number
PCT/NO2021/050042
Other languages
French (fr)
Inventor
Per Olav Haughom
Original Assignee
Wind Spider As
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wind Spider As filed Critical Wind Spider As
Publication of WO2021167468A1 publication Critical patent/WO2021167468A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
    • F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
    • F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D15/00—Transmission of mechanical power
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
    • F16C23/02—Sliding-contact bearings
    • F16C23/04—Sliding-contact bearings self-adjusting
    • F16C23/043—Sliding-contact bearings self-adjusting with spherical surfaces, e.g. spherical plain bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
    • F16H1/46—Systems consisting of a plurality of gear trains each with orbital gears, i.e. systems having three or more central gears
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
    • F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
    • F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
    • F16H37/0833—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with arrangements for dividing torque between two or more intermediate shafts, i.e. with two or more internal power paths
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/025—Support of gearboxes, e.g. torque arms, or attachment to other devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/40—Transmission of power
    • F05B2260/403—Transmission of power through the shape of the drive components
    • F05B2260/4031—Transmission of power through the shape of the drive components as in toothed gearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/10—Sliding-contact bearings for exclusively rotary movement for both radial and axial load
    • F16C17/102—Sliding-contact bearings for exclusively rotary movement for both radial and axial load with grooves in the bearing surface to generate hydrodynamic pressure
    • F16C17/107—Sliding-contact bearings for exclusively rotary movement for both radial and axial load with grooves in the bearing surface to generate hydrodynamic pressure with at least one surface for radial load and at least one surface for axial load
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/10—Application independent of particular apparatuses related to size
    • F16C2300/14—Large applications, e.g. bearings having an inner diameter exceeding 500 mm
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2360/00—Engines or pumps
    • F16C2360/31—Wind motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02039—Gearboxes for particular applications
    • F16H2057/02078—Gearboxes for particular applications for wind turbines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Definitions

  • Solutions are therefore sought that make it possible to absorb peak loads in a wind turbine in a way that is simpler and more cost-effective than the ways which are known today.
  • the purpose of the invention is to remedy or reduce at least one of the disad vantages of prior art, or at least provide a useful alternative to prior art.
  • the invention concerns a wind turbine which comprises a transmission according to any of the invention's other aspects.
  • a plurality of planetary wheels 30 are supported in the planetary bearing 26 by shafts 31 and have toothing engagement against the ring gears 27 and a first sun wheel 32 and a second sun wheel 33 which in turn is connected to respectively a first outgoing shaft 34 and a second outgoing shaft 35 concentrically supported on the shaft 8.
  • Incoming torque 36 entering through the flange connection 25 and to the shaft 8 is carried on to the planetary bearing 26 and is distributed equally on parallel planetary wheels 30 which transfer half of the torque to each of the out going shafts 34, 35.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Gear Transmission (AREA)
  • Retarders (AREA)

Abstract

Transmission for a wind turbine, wherein the transmission comprises a gear (1) coupled to a shaft (6) supported in bearing pedestals (4, 5) and connected to a hub (7) with attachments (3) for the connection of wind turbine blades, wherein the gear (1) comprises: - an incoming shaft (8) which is coupled to a planetary bearing (26) for two planetary gears which are arranged in parallel, wherein the first planetary gear comprises a plurality of planetary wheels (30), a ring gear (27) and a first sun wheel (32) which is connected to a first outgoing shaft (35) by a first bevel gear (37), and the second planetary gear comprises a plurality of planetary wheels (30), a ring gear (27) and a second sun wheel (33) which is connected to a second outgoing shaft (34) by a second bevel gear (38); and - a differential which comprises a plurality of sun wheels (41) which are supported in differential case parts (19, 20) by shafts (21), and the plurality of sun wheels (41) are engaged with the bevel gears (37, 38), and the differential case parts (19, 20) are connected to an outgoing flange (14).

Description

TRANSMISSION FOR A WIND TURBINE
The present invention concerns a transmission, specifically a transmission arranged to distribute a torque.
Background
When transmitting relatively large torques, so-called planetary gears are often used. In wind turbines, it is crucial to be able to receive and transmit large tor ques and at the same time be able to divert extreme peak loads due to disorderly load representation and large mass moments of inertia in the wind propeller. A known way to reduce a torque, is by use of so-called planetary gears.
Such a solution is described in the patent document N020130213, wherein two planetary gears are serially mounted. By serially mounting the planetary gears, a torque and a gear-up of the rotational speed from an incoming rotor shaft from the hub and to an outgoing shaft to a generator which is placed in the column of the wind turbine, can occur in two stages.
A problem with the solution described in N020130213 is that the peak loads are not diverted, and the drive line must therefore be dimensioned to be able to ab sorb said peak loads, which results in an unnecessarily powerful transmission and drive line at ordinary loads, and which adds to the drive line weight and costs.
Solutions are therefore sought that make it possible to absorb peak loads in a wind turbine in a way that is simpler and more cost-effective than the ways which are known today. The purpose of the invention is to remedy or reduce at least one of the disad vantages of prior art, or at least provide a useful alternative to prior art.
General description of the invention
The invention is defined by the independent patent claims. The dependent claims define advantageous embodiments of the invention.
According to an aspect of the invention, a transmission for a wind turbine is pro vided, wherein the transmission comprises a gear coupled to a shaft supported in bearing pedestals and connected to a hub with attachments for the connection of wind turbine blades, wherein the gear comprises:
- an incoming shaft which is coupled to a common planetary bearing for two plane tary gears which are arranged in parallel, wherein the first planetary gear compris es a plurality of planetary wheels, a ring gear and a first sun wheel which is con nected to a first outgoing shaft by a first bevel gear, and the second planetary gear comprises a plurality of planetary wheels, a ring gear and a second sun wheel which is connected to a second outgoing shaft by a second bevel gear. The transmission further comprises a differential which comprises a plurality of sun wheels support ed in differential case parts via shafts, and the plurality of sun wheels are engaged with the bevel gears, and the differential case parts are connected to an outgoing flange.
The ring gear can be connected to a moment yoke and further to power absorbers with attachments for foundations.
The shaft can be supported by slide bearing elements against bearing elements connected to bearing pedestals by a spherical surface (spherical bearing).
In a further aspect, a transmission for a wind turbine is provided wherein the transmission may comprise any selection of any of the following characteristics:
- a gear coupled to a shaft supported in bearing pedestals and connected to a hub with attachments for the connection of wind turbine blades, wherein the gear comprises:
- an incoming shaft which is coupled to a planetary bearing for two planetary gears which are arranged in parallel, wherein the first planetary gear comprises a plurali ty of planetary wheels, a ring gear and a first sun wheel connected to a first out going shaft by a first bevel gear, and the second planetary gear comprises a plurali ty of planetary wheels, a ring gear and a second sun wheel which is connected to a second outgoing shaft by a second bevel gear; and
- a differential which comprises a plurality of sun wheels which are supported in dif ferential case parts by shafts, and the plurality of sun wheels are engaged with the bevel gears, and the differential case parts are connected to an outgoing flange.
The ring gear can be connected to a moment yoke and further to power absorbers with attachments for foundations.
The shaft can be supported by slide bearing elements against bearing elements connected to bearing pedestals by a spherical surface (spherical bearing).
The transmission may further comprise any characteristic described anywhere herein.
An effect of the transmission described herein, is that a low incoming rotational speed in a transmission can be transformed to a higher rotational speed, at the same time as an associated high incoming torque can be distributed in the trans mission and reduced. Further advantages of the invention will be made known in the description herein.
In a further aspect, the invention concerns a wind turbine which comprises a transmission according to any of the invention's other aspects.
An advantage to this is that wind turbines with lighter transmissions than prior art may be provided, and where the transmission can reduce dynamic loads on the wind turbine due to peak loads from the wind propeller.
Exemplary embodiments In the following, different embodiments will be described, which are to be consid ered examples only, with reference to the attached drawings, wherein:
Fig. 1 shows a gear configuration with shaft and bearing as well as attachment of wind turbine blades;
Fig. 2 shows the gear from above;
Fig. 3 shows the gear from the side; Fig. 4 shows a cross-section C-C through the gear and an associated differential;
Fig. 5 shows a cross-section F-F through the gear;
Fig. 6 shows an "exploded" configuration of the gear components; Fig. 7 shows the differential;
Fig. 8 shows a cross-section A-A through the differential;
Fig. 9 shows an "exploded" configuration of the differential components;
Fig. 10 shows the main shaft with bearing pedestals; Fig. 11 shows a cross-section through the bearing for the main shaft; and
Fig. 12 shows a detail of the bearing support.
On the figures, 1 indicates a gear coupled with a differential 2 which has an out going shaft flange 14. The gear 1 rests on foundations 12 and is coupled to a shaft 6 supported in bearing pedestals 4 and 5 and connected to a hub 7 whereto attach ments 3 for wind turbine blades are arranged. The gear 1 has a central incoming main shaft 8 with rotation about a centre line 18 and with a flange connection 25 to the shaft 6. The main shaft 8 is fixedly connected to a planetary bearing 26 through a connection 29. The planetary bearing 26 is supported by bearings 46 in a housing 11 which in turn is screwed together with bolts 17 and cylindrical disks 15. Two ring gears 27 are supported against cylindrical disks 15 through a bearing lining 28 and connected to a moment yoke 10, so that overload on the torque 36 is transmitted to power absorbers 9 attached to gear foundations 12.
A plurality of planetary wheels 30 are supported in the planetary bearing 26 by shafts 31 and have toothing engagement against the ring gears 27 and a first sun wheel 32 and a second sun wheel 33 which in turn is connected to respectively a first outgoing shaft 34 and a second outgoing shaft 35 concentrically supported on the shaft 8. Incoming torque 36 entering through the flange connection 25 and to the shaft 8 is carried on to the planetary bearing 26 and is distributed equally on parallel planetary wheels 30 which transfer half of the torque to each of the out going shafts 34, 35. With this solution, an incoming, large torque 36 can be distrib uted on two parallel planetary gears, which facilitates transmission of large tor ques.
To collect and distribute the torque evenly from the outgoing shafts 34, 35, a dif ferential 2 is arranged, which consists of a first bevel gear 37 which is coupled to the first outgoing shaft 34 by a spline connection 39, and a second bevel gear 38 which is coupled to the second outgoing shaft 35 by a spline connection 40. A plu rality of sun wheels 41 are supported in shafts 21 which in turn are supported in two case parts 19, 20 which are screwed together with bolts 45. Outgoing torque is transmitted through the shafts 21 to the case parts 19, 20 and further to an out going flange 14.
The shaft 6 is supported in slide bearing elements 53 which in turn rest on bearing elements 52 with a spherical surface 60 against bearing rollers 4 and 5.
Bearing support in spherical surfaces 60 is necessary to avoid unbalanced load on the bearing surfaces at load strain and deformations of the shaft 6 about a centre axis 18 for the shaft 6. Bearing support in spherical surfaces 60 may herein be un derstood as a spherical bearing support.
It should be noted that all embodiments mentioned above illustrate the invention, but do not delimit it, and experts on the area will be able to design many alterna tive embodiments without deviating from the scope of the attached claims. In the claims, the reference numbers in parenthesis shall not be considered delimiting.
The use of the verb "to comprise" and its different forms does not exclude the presence of elements or steps not mentioned in the claims. The indefinite articles "a" or "an" before an element do not exclude the presence of more such elements. The fact that some characteristics are specified in mutually different dependent claims does not indicate that a combination of these characteristics cannot be used advantageously.
The reference to a gear for wind turbines does not in any way delimit the applica tion's scope for use in other contexts.
A gear which is coupled between a wind propeller and for example a generator, is usually located in an elevated nacelle at the top of a pillar.
The gear is needed to transform up the wind turbine's relatively low rotational speed to a rotational speed which is appropriate for a generator.
The gear's dimensions and weight can be considerable, and it is obvious that a re duction of the gear's weight and dimensions will have great impact on costs and embodiments of bearing constructions.
A device for a gear coupled to a shaft supported in bearing pedestals and connect ed to a hub with attachments for the connection of wind turbine blades is provid ed. The gear has an incoming shaft coupled to a planetary bearing and two parallel planetary gears with planetary wheels, ring gear and with sun wheels connected to outgoing shafts coupled to bevel gears engaged with a bevel gear supported in shafts against case parts with connection to an outgoing flange.
More specifically, what is provided is a gear device where an incoming drive shaft in a planetary gear device is coupled to a common planetary bearing for two parallel planetary gears so that the planetary wheels have equal diameter and are engaged with common stationary ring gears. Thereby, an incoming moment can be distrib uted on two planetary gears. Each sun wheel is coupled to its own outgoing shaft concentrically supported about an incoming shaft. The shafts from each sun wheel are coupled to a common outgoing shaft through a differential, so that the load on the sun wheels is distributed evenly. In this case, differential means a device which by means of gears distributes load between two concentric shafts to that outgoing rotational speed and moment exit on only one shaft.
Over time, wear can occur on the gearwheels of the two planetary gears. The wear can be different between the two planetary gears. Therefore, relative and fluctuat ing speed differences may arise between the two outgoing shafts. By the two out going shafts being coupled to the differential, said speed differences and torque may be equalised, and torque from the two shafts may be transmitted to the one outgoing shaft.
To limit large peak moment loads from the wind turbine, the ring gear is supported in such a way that it can rotate in a limited angle and is coupled to a moment yoke with associated moment arms coupled to power absorbers in the form of hydraulic cylinders or coils.
The provided gear with two parallel planetary gears wherein outgoing shafts from the planetary gears are coupled to a differential, may, as the invention describes, provide a significantly increased capacity for torque transmission in relation to di mensions and the number of gearwheels. This is intended herein as the invention being able to provide a gear device which is smaller and lighter than prior art. The shaft is supported by slide bearing elements against bearing elements con nected to bearing pedestals by a spherical surface, known as spherical bearing. Bearing support in spherical surfaces is necessary to avoid unbalanced load on the bearing surfaces at load strain and deformations of the shaft about a centre axis for the shaft.

Claims

P a t e n t c l a i m s
1. Transmission for a wind turbine, wherein the transmission comprises a gear (1) coupled to a shaft (6) supported in bearing pedestals (4, 5) and connected to a hub (7) with attachments (3) for the connection of wind turbine blades, c h a r a c t e r i s e d i n that the gear (1) comprises:
- an incoming shaft (8) which is connected to a planetary bearing (26) for two planetary gears which are arranged in parallel, wherein the first planetary gear comprises a plurality of planetary wheels (30), a ring gear (27) and a first sun wheel (32) which is connected to a first outgoing shaft (35) by a first bevel gear (37), and the second planetary gear comprises a plurality of planetary wheels (30), a ring gear (27) and a second sun wheel (33) which is connected to a second outgoing shaft (34) by a second bevel gear (38); and
- a differential which comprises a plurality of sun wheels (41) which are supported in differential case parts (19, 20) by shafts (21), and the plurali ty of sun wheels (41) are engaged with the bevel gears (37, 38), and the differential case parts (19, 20) are connected to an outgoing flange (14).
2. Transmission according to claim 1, wherein the ring gear (27) is connect ed to a moment yoke (10) and further to power absorbers (9) with at tachments for foundations (12).
3. Transmission according to any of the claims 1 and 2, wherein the shaft (6) is supported by slide bearing elements (53) against bearing elements (52) connected to bearing pedestals (4, 5) by a spheri cal surface (60).
4. Wind turbine comprising a transmission according to any of the preceding claims.
PCT/NO2021/050042 2020-02-19 2021-02-19 Transmission for a wind turbine WO2021167468A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20200220 2020-02-19
NO20200220A NO345863B1 (en) 2020-02-19 2020-02-19 Gear unit for use in wind turbines

Publications (1)

Publication Number Publication Date
WO2021167468A1 true WO2021167468A1 (en) 2021-08-26

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WO (1) WO2021167468A1 (en)

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1045139A2 (en) * 1999-04-12 2000-10-18 A. Friedr. Flender Ag Wind turbine
US6607464B1 (en) * 1999-12-23 2003-08-19 Lohmann + Stolterfoht Gmbh Transmission, especially for wind power installations
WO2010027618A2 (en) * 2008-09-05 2010-03-11 General Electric Company System and assembly for power transmission and generation in a wind turbine
EP2184488A1 (en) * 2008-10-30 2010-05-12 General Electric Company Split torque compound planetary drivetrain for wind turbine applications
US20110206517A1 (en) * 2008-02-11 2011-08-25 S4 Energy B.V. Transmission device for a machine for producing electricity from a variable speed motive power source, unit for producing electricity and wind turbine both so equipped, and method of setting a transmission ratio
US8075190B1 (en) * 2010-09-16 2011-12-13 Vestas Wind Systems A/S Spherical plain bearing pocket arrangement and wind turbine having such a spherical plain bearing
DE102010040654A1 (en) * 2010-09-13 2012-03-15 Repower Systems Se Disassembly of a gearbox of a wind turbine
US20120134805A1 (en) * 2011-11-16 2012-05-31 Jacob Johannes Nies Split load path gearbox
NO20130213A1 (en) * 2013-02-07 2014-08-08 Ikm Technique As COMPONENT ARRANGEMENT DEVICE TO PROVIDE EASY OPERATION AND MAINTENANCE OF WINDOWS
DE102015220159A1 (en) * 2015-10-16 2017-04-20 Aktiebolaget Skf Rotor shaft bearing for a wind turbine
DE102015223307A1 (en) * 2015-11-25 2017-06-01 Zf Friedrichshafen Ag Wind Turbine Gearbox
US20180051776A1 (en) * 2016-08-19 2018-02-22 Siemens Aktiengesellschaft Gearbox
GB2567969A (en) * 2016-08-22 2019-05-01 Japan Fudo Ind Inc Fluid machine and power generation device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3926072A (en) * 1974-10-24 1975-12-16 Northern Eelectric Company Lim Planetary differential transmission
DE102005001123A1 (en) * 2005-01-10 2006-07-20 Infineon Technologies Ag A communication system, method for controlling a communication system, network access device, and method for controlling a network access device

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1045139A2 (en) * 1999-04-12 2000-10-18 A. Friedr. Flender Ag Wind turbine
US6607464B1 (en) * 1999-12-23 2003-08-19 Lohmann + Stolterfoht Gmbh Transmission, especially for wind power installations
US20110206517A1 (en) * 2008-02-11 2011-08-25 S4 Energy B.V. Transmission device for a machine for producing electricity from a variable speed motive power source, unit for producing electricity and wind turbine both so equipped, and method of setting a transmission ratio
WO2010027618A2 (en) * 2008-09-05 2010-03-11 General Electric Company System and assembly for power transmission and generation in a wind turbine
EP2184488A1 (en) * 2008-10-30 2010-05-12 General Electric Company Split torque compound planetary drivetrain for wind turbine applications
DE102010040654A1 (en) * 2010-09-13 2012-03-15 Repower Systems Se Disassembly of a gearbox of a wind turbine
US8075190B1 (en) * 2010-09-16 2011-12-13 Vestas Wind Systems A/S Spherical plain bearing pocket arrangement and wind turbine having such a spherical plain bearing
US20120134805A1 (en) * 2011-11-16 2012-05-31 Jacob Johannes Nies Split load path gearbox
NO20130213A1 (en) * 2013-02-07 2014-08-08 Ikm Technique As COMPONENT ARRANGEMENT DEVICE TO PROVIDE EASY OPERATION AND MAINTENANCE OF WINDOWS
DE102015220159A1 (en) * 2015-10-16 2017-04-20 Aktiebolaget Skf Rotor shaft bearing for a wind turbine
DE102015223307A1 (en) * 2015-11-25 2017-06-01 Zf Friedrichshafen Ag Wind Turbine Gearbox
US20180051776A1 (en) * 2016-08-19 2018-02-22 Siemens Aktiengesellschaft Gearbox
GB2567969A (en) * 2016-08-22 2019-05-01 Japan Fudo Ind Inc Fluid machine and power generation device

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Publication number Publication date
NO20200220A1 (en) 2021-08-20
NO345863B1 (en) 2021-09-13

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