EP2609327A2 - Procédé pour réduire les vibrations dans une éolienne - Google Patents

Procédé pour réduire les vibrations dans une éolienne

Info

Publication number
EP2609327A2
EP2609327A2 EP11754293.6A EP11754293A EP2609327A2 EP 2609327 A2 EP2609327 A2 EP 2609327A2 EP 11754293 A EP11754293 A EP 11754293A EP 2609327 A2 EP2609327 A2 EP 2609327A2
Authority
EP
European Patent Office
Prior art keywords
pendulum
nacelle
wind turbine
vibrations
damping
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP11754293.6A
Other languages
German (de)
English (en)
Inventor
Franz Mitsch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fm Besitz & Co Kg GmbH
Original Assignee
Fm Besitz & Co Kg GmbH
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 Fm Besitz & Co Kg GmbH filed Critical Fm Besitz & Co Kg GmbH
Priority to EP11754293.6A priority Critical patent/EP2609327A2/fr
Publication of EP2609327A2 publication Critical patent/EP2609327A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F03D7/00—Controlling wind motors 
    • F03D7/02—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • F03D7/0296—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor to prevent, counteract or reduce noise emissions
    • 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
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • 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
    • F05B2260/96—Preventing, counteracting or reducing vibration or noise
    • 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
    • F05B2260/96—Preventing, counteracting or reducing vibration or noise
    • F05B2260/964—Preventing, counteracting or reducing vibration or noise by damping means
    • 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

  • the invention relates to a method and means for carrying out this method for damping vibrations occurring in wind turbines.
  • the invention relates to a corresponding method for reducing or eliminating
  • the invention further relates to gondolas of wind power plants, which are equipped with a vibration damper, which is able to dampen said rotor blade vibrations.
  • Wind turbines are playing an increasing role in the highly competitive energy market of many countries and regions.
  • the aim is a high yield of energy generated by wind power at the lowest possible cost. Since the electrical energy generated by wind power is proportional to the third power of the wind speed, the power of a wind turbine is of crucial economic importance. Height
  • Reduction of the rotor speed or shutdown of the system can be countered.
  • WO 00/06898 discloses a similar system in which a liquid in a U-shaped container placed in the rotor tip is intended to provide damping of Edgewise vibrations by movements within the container.
  • WO 2010/025732 teaches damping elements in the rotor blade of a wind turbine, which move against each other when vibrations occur and are interconnected by a visco-elastic material.
  • EP 1 065 374 B1 describes a method for reducing vibrations in wind turbines, including edgewise oscillations of rotor blades, in which elastomer components with high damping properties are preferably installed rotationally symmetrical to the rotor shaft between the gearbox and the machine frame.
  • WO 99/63219 describes a spring-mass damping system or a
  • Pendulum system which is attached to the nacelle in such a way that it is able to vibrate only in the horizontal plane perpendicular to the rotor blade plane and
  • the object is achieved by installing a pendulum silencer with preferably elastic spherical pendulum joint in or on the nacelle of the wind turbine.
  • the pendulum rod is not mounted vertically in the tower but horizontally / horizontally, or aligned.
  • Such a pendulum can not only perform vibrations in the horizontal plane perpendicular to the rotor blade plane, but also, if necessary, vibrations parallel to the rotor blade plane.
  • the pendulum of EP 1 008 747 B1 can only execute vibrations in the horizontal plane.
  • present invention increasingly in the upper region particularly susceptible to vibration in the said vertical plane, in particular occurring Edgweise- / Flapwise
  • Rotor blade vibrations can be avoided or reduced sufficiently.
  • vertical pitching movements of the nacelle can be combated.
  • the invention thus provides a method for reducing Edgewise and / or Flapwise vibrations produced by rotor blades (1) and / or the second embodiment.
  • the vibration damper comprises a pendulum rod (7) and a pendulum joint (6, 6a, 6b, 6c) equipped with an elastic damping element (6b), wherein the pendulum rod (7) is mounted horizontally and aligned in the longitudinal direction to the axis of the rotor shaft , and the pendulum joint (6) the pendulum rod (7)
  • the invention further relates to a nacelle (8) for a wind turbine comprising a pendulum trailer mounted on or in the nacelle, on the machine carrier or the gear (2) of the wind turbine, characterized in that
  • Pendulum absorber (5, 6, 7) a horizontally mounted, in the longitudinal direction to the axis of the rotor shaft directed pendulum rod (7) and a pendulum joint (6), which is essentially of rotationally symmetrical spherical or hemispherical
  • Elastomer elements (6 b) is formed so that circular, or derived therefrom movements of the absorber in the horizontal plane perpendicular to
  • the invention also relates to a wind turbine, comprising a nacelle, which is equipped with a corresponding and appropriately oriented pendulum trailer together with elastic pendulum joint.
  • Flapwise oscillations and / or oscillations in the region of the second tower natural frequency can now be achieved according to the invention with a pendulum absorber, as already described in principle in EP 1008747B1.
  • a pendulum absorber must be installed horizontally / horizontally.
  • pendulum comprising a pendulum rod (7) has a symmetrical spherical or hemispherical pendulum joint (6) located at one end of the pendulum rod.
  • the pendulum joint essentially comprises a housing (6a), an inner part (6c) consisting of sheet metal or plastic, and elastic components / layers (6b). The elastic parts enclose the joint in all directions, so that one
  • Damping of vibrations in the horizontal and in the vertical direction, or in all directions on a circular surface is made possible parallel to the rotor blade plane.
  • the elastomeric parts (6b) of the pendulum joint (6) are made of elastic material, which preferably causes a high damping. Such materials are known in the art. Materials suitable for the invention have a damping angle between 5 ° and 30 °, preferably between 10 ° and 25 °, in particular> 5 ° and ⁇ 15 °.
  • elastomers are used whose spring stiffness leads to a Tilgerfrequenz of ⁇ 15Hz, preferably ⁇ 10Hz, and in particular between 5Hz and 10Hz.
  • Suitable elastic materials have a shear modulus between 0.2 and 2.0 N / mm 2 , preferably between 0.5 and 1.0 N / mm 2 .
  • the pendulum rod (7) is depending on the size of the wind turbine and the space in the gondola area 50 to 150cm long, preferably 80 to 100cm. Longer embodiments require no additional pendulum mass (5). In this case, the Pendulum rod (7) even the pendulum mass.
  • the rod mass has the advantage that the length of the rod represents a mass moment of inertia, which causes an increase in mass. If an additional pendulum mass (point mass) is used, it is advantageous to make it adjustable along the pendulum rod (7). With that you can
  • the pendulum mass (5) can be constructed for further fine tuning, as shown in Fig. 6, of individual mass parts, such as metal discs or plates.
  • Pendulum mass (5) according to the invention 2 - 5% of the mass moment of inertia of the oscillating mass (consisting of rotor, rotor shaft and nacelle) amount.
  • a mass moment of inertia of the absorber mass of 1-10% of the mass moment of inertia of the oscillating mass is particularly advantageous.
  • the pendulum absorber can be placed inside the nacelle (8) so that it is easily accessible and easy to install. Furthermore, the elastic pendulum bearing (6) may be arranged in the nacelle and the Tilgerstange penetrate the nacelle skin to the rear, so that the mass (5) is arranged only outside the nacelle with the greatest possible distance from the rotor. This requires a long pendulum rod (7).
  • the system can be used in systems with gears or in gearless systems
  • the elastic pendulum bearing (6) consists of the pendulum bearing housing (6a), which with the wind turbine gondola (8) firmly connected (screwed, riveted, etc.) must be.
  • the whole thing can also consist of two hemispheres, so that in the elastomer, a pure thrust load arises.
  • the elastomer layers can be carried out with intermediate plates in different layer thicknesses. It is important that the element around the pendulum rod is rotationally symmetrical, so that the same Natural frequencies in vertical and horizontal directions in one plane
  • Elastomeric elements (6b) are equipped with high damping elastomer as specified above. Short description of the sizes:
  • FIG. 1 Movement of the rotor blades (Edgewise swinging motion)
  • Fig. 2 Gondola with rotor blades and absorber outside the nacelle
  • Fig. 3 Gondola with rotor blades and absorber inside the nacelle
  • Fig. 4 rod-shaped pendulum mass
  • Fig. 5 absorber with mass
  • Fig. 6 absorber with pendulum joint, rod and movable / adjustable mass.

Landscapes

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

Abstract

L'invention concerne un procédé et des moyens permettant de mettre en oeuvre ce dernier, pour atténuer les vibrations apparaissant dans des éoliennes. L'invention concerne en particulier un procédé correspondant, servant à réduire ou éliminer les vibrations provoquées par les pales de rotor d'une éolienne, en particulier les vibrations dans le plan du rotor.
EP11754293.6A 2010-08-24 2011-08-19 Procédé pour réduire les vibrations dans une éolienne Withdrawn EP2609327A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11754293.6A EP2609327A2 (fr) 2010-08-24 2011-08-19 Procédé pour réduire les vibrations dans une éolienne

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP10008796 2010-08-24
EP11754293.6A EP2609327A2 (fr) 2010-08-24 2011-08-19 Procédé pour réduire les vibrations dans une éolienne
PCT/EP2011/004180 WO2012025211A2 (fr) 2010-08-24 2011-08-19 Procédé pour réduire les vibrations dans une éolienne

Publications (1)

Publication Number Publication Date
EP2609327A2 true EP2609327A2 (fr) 2013-07-03

Family

ID=44582846

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11754293.6A Withdrawn EP2609327A2 (fr) 2010-08-24 2011-08-19 Procédé pour réduire les vibrations dans une éolienne

Country Status (2)

Country Link
EP (1) EP2609327A2 (fr)
WO (1) WO2012025211A2 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK172039B1 (da) 1994-02-07 1997-09-22 Bonus Energy As Vindmøllevinge og fremgangsmåde til reduktion af svingninger i en sådan
WO1999032789A1 (fr) 1997-12-09 1999-07-01 Lm Glasfiber A/S Pale d'eolienne a amortisseur de vibrations
DK174404B1 (da) 1998-05-29 2003-02-17 Neg Micon As Vindmølle med svingningsdæmper
ATE296955T1 (de) 1998-07-28 2005-06-15 Neg Micon As Windturbinenflügel mit u-förmigen schwingungsdämpfer
DE19856500B4 (de) * 1998-12-08 2005-12-08 Franz Mitsch Schwingungstilger
DE19930751A1 (de) * 1999-07-02 2001-01-04 Franz Mitsch Verfahren zur Reduzierung von Schwingungen in Windkraftanlagen
EP1286076A1 (fr) * 2001-08-20 2003-02-26 Franz Mitsch Amortisseur dynamique linéaire et réglable
WO2010025732A2 (fr) 2008-09-03 2010-03-11 Vestas Wind Systems A/S Amortissement des vibrations d'une pale d'éolienne

Also Published As

Publication number Publication date
WO2012025211A2 (fr) 2012-03-01
WO2012025211A3 (fr) 2012-06-07

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