Hansen Transmissions International

Antwerp, Belgium

Hansen Transmissions International

Antwerp, Belgium

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Grant
Agency: European Commission | Branch: FP7 | Program: CP-IP | Phase: ENERGY-2007-2.3-01 | Award Amount: 7.66M | Year: 2008

The EU Council of Ministers held 8 & 9th march 2007 examined theses issues and agreed: Renewable energy will cover at least 20 % of the EUs energy demand by 2020, amongst others. Wind power can make the most important contribution to these targets, if sufficient emphasis is established on technological R&D and market development. Because of the current European scenario and its forecasted evolution towards 2020, offshore wind energy is called to play a key role. Offshore maintenance costs in the current situation are still too high, requiring higher feed-in tariffs for the private investors business case to reach the minimum profitability. This project aims is to offset this paradigm, allowing offshore wind power to be deployed in the same way onshore has. RELIAWIND consortium, for the first time in the European Wind Energy Sector, and based on successful experiences from other sectors (e.g. aeronautics) will jointly & scientifically study the impact of reliability, changing the paradigm of how Wind Turbines are designed, operated and maintained. This will lead to a new generation of offshore (and onshore) Wind energy Systems that will hit the market in 2015. The objectives of this research project are: To identify Critical Failures and Components (WP-1: Field Reliability Analysis) To understand Failures and Their Mechanisms (WP-2: Design for Reliability) To define the Logical Architecture of an advanced WTG Health Monitoring System (WP-3: Algorithms) To demonstrate the Principles of the Project Findings (WP-4: Applications) To train internal and external partners and other Wind Energy sector stakeholders (WP-5: Training) To disseminate the achieved new knowledge through Conferences, Workshops, Web Site and Media (WP-6: Dissemination)


Patent
Hansen Transmissions International | Date: 2011-02-16

The present invention provides a parallel gear unit (20) for a gearbox (30) for a wind turbine. The parallel gear unit (20) comprises at least two parallel shafts (21, 22), at least one of the shafts (21, 22) being supported by roller bearings (24) and each shaft (21, 22) comprising a gear (23, 25) with helical teeth, the gears (23, 25) of each shaft (21, 22) being adapted for meshing with each other. The parallel gear unit (20) furthermore comprises a thrust collar (26) on at least one of the shafts (21, 22). In a parallel gear unit (20) according to embodiments of the invention the bearings (24) supporting the gear do not suffer from high axial forces or at least suffer less from such axial forces than prior art bearings. The present invention also provides a gearbox (30) comprising a parallel gear unit (20) according to embodiments of the invention and a wind turbine comprising such a gearbox (30).


Patent
Hansen Transmissions International | Date: 2011-06-08

The present invention provides a planetary gear unit (20). The planetary gear unit (20) comprises a planet carrier (11) comprising a backplate (13) and being provided with planet shafts (14) distributed uniformly around the planet carriers axis and extending through bores (28) in the backplate (13), each planet shaft (14) rotatably supporting a pair of planet gears (17, 18) by means of planet bearings (15,16), the planet gears (17, 18) being mounted between a ring gear (19) and a sun gear (21) for mutual interaction. The planetary gear unit (20) furthermore comprises a key (26) provided in a keyway (27) of the planet shaft (14) and extending to the backplate (13) for preventing the at least one planet shaft (14) from rotating around its own axis. According to the invention, the key (26) and keyway (27) are provided at a location such that, under conditions whereby the planet shaft (14) is prevented from rotating relatively to the backplate (13) through the working of friction, the key (26) is elastically displaced in such a way that there is no contact between the key (26) and the keyway (27) in the planet shaft, but not at a zone of highest stress of the bores (28) in the backplate (13). An advantage of a planetary gear unit (20) according to embodiments of the invention is that rotation of the planet shafts (14) relative to his bore in the planet carrier (11) is prevented. The invention results in a free of wear contact between planet shaft (14) and planet carrier (11), thereby allowing all degrees of freedom of the planet shaft (14) without disturbing the load distribution between the planet gears (17, 18) of a pair on one planet shaft (14) and without disturbing normal functioning of the planetary gear unit (20).


Patent
Hansen Transmissions International | Date: 2011-02-16

The present invention provides a parallel gear unit (20) for a gearbox (30) for a wind turbine. The parallel gear unit (20) comprises at least a low speed shaft (21) and a high speed shaft (22), each shaft (21, 22) comprising a gear (23, 25) with helical teeth, the gears (23, 25) of each shaft (21, 22) being adapted for meshing with each other. The low speed shaft (21) is rotatably supported by roller bearings (24a) and the high speed shaft (22) is rotatably supported by sliding bearings (24b). The present invention also provides a gearbox (30) comprising a parallel gear unit (20) according to embodiments of the invention and a wind turbine comprising such a gearbox (30).


The present invention provides a planetary gear unit (20) for a gearbox (40) for a wind turbine. The planetary gear unit (20) comprises a housing (21) and a planet carrier (22) provided with planet shafts (23) distributed uniformly around a planet carriers axis for rotatably supporting planet gears (24) which are mounted between a sun gear (26) and a ring gear (27) for mutual interaction and which are supported by rolling bearings (25). The planet carrier (22) is rotatably mounted in the housing (21) by means of sliding bearings (28).


Patent
Hansen Transmissions International | Date: 2010-05-19

A planetary gear transmission unit (10) includes a ring gear (17), a sun gear (18) and a planet carrier (19) driving a plurality of planet shafts (12) onto which planet gears (11) are rotatably mounted by way of planet bearings (13). The planet shafts are flexpin shafts (12) and each flexpin shaft (12) includes a pair of planet gears (11), each planet gear (11) of the pair being of the single helical type having a helix angle opposite to that of the other planet gear (11) of the pair. A gearbox (20) including a planetary gear transmission unit (10) according to embodiments of the invention and a wind turbine including such a gearbox (20) are also described.


Patent
Hansen Transmissions International | Date: 2010-08-03

A parallel gear unit (20) for a gearbox (30) for a wind turbine includes at least a low speed shaft (21) and a high speed shaft (22), each shaft (21, 22) having a gear (23, 25) with helical teeth, the gears (23, 25) of each shaft (21, 22) being adapted for meshing with each other. The low speed shaft (21) is rotatably supported by roller bearings (24a) and the high speed shaft (22) is rotatably supported by sliding bearings (24b). A gearbox (30) including the parallel gear unit (20) and a wind turbine including such a gearbox (30) are described.


Patent
Hansen Transmissions International | Date: 2010-08-03

A parallel gear unit (20) for a gearbox (30) for a wind turbine includes at least two parallel shafts (21, 22), at least one of the shafts (21, 22) being supported by roller bearings (24) and each shaft (21, 22) including a gear (23, 25) with helical teeth, the gears (23, 25) of each shaft (21, 22) being adapted for meshing with each other. The parallel gear unit (20) furthermore includes a thrust collar (26) on at least one of the shafts (21, 22). In a parallel gear unit (20) according to preferred embodiments, the bearings (24) supporting the gear do not suffer from high axial forces or at least suffer less from such axial forces than prior art bearings. A gearbox (30) including the parallel gear unit (20) and a wind turbine including such a gearbox (30) are described.


Patent
Hansen Transmissions International | Date: 2010-11-29

A planetary gear unit includes a planet carrier having a backplate and being provided with planet shafts distributed uniformly around the planet carriers axis and extending through bores in the backplate, each planet shaft rotatably supporting a pair of planet gears by planet bearings, the planet gears being mounted between a ring gear and a sun gear for mutual interaction. The planetary gear unit further includes a key provided in a keyway of the planet shaft and extending to the backplate for preventing the at least one planet shaft from rotating around its own axis. The key and keyway are provided at a location positioned between 45 and 270 in a clockwise direction around the circumference of the planet shaft, with 0 being defined as a point at the planet shaft circumference corresponding with the largest distance from the centre of the bogie plate seen from the rotor side onwards.


Patent
Hansen Transmissions International | Date: 2011-01-05

The present invention provides a planetary gear transmission unit (20) comprising a planet carrier (14) which supports and locates circumferential spaced pairs of planet gears (12), and at least one planet shaft (13). The planetary gear transmission unit (20) furthermore comprises a planet shaft locking mechanism (18) between the at least one planet shaft (13) and the planet carrier (14) for preventing the at least one planet shaft (13) from rotating around its own axis. An advantage of a planetary gear transmission unit (20) according to embodiments of the invention is that rotation of the planet shafts (13) relative to his bore in the planet carrier (14) is prevented. The invention results in a free of wear contact between planet shaft (13) and planet carrier (14), thereby allowing all degrees of freedom of the planet shaft (13), without disturbing the load distribution between the planet gears (12) of a pair on one planet shaft (13).

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