CN107208602A - 风力涡轮机 - Google Patents

风力涡轮机 Download PDF

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CN107208602A
CN107208602A CN201680006753.0A CN201680006753A CN107208602A CN 107208602 A CN107208602 A CN 107208602A CN 201680006753 A CN201680006753 A CN 201680006753A CN 107208602 A CN107208602 A CN 107208602A
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rotor
wind turbine
generator
turbine according
stationary ring
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CN107208602B (zh
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凯斯扬·克兰特
乌德·弗洛伊格尔
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Mega Wind Production Output Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D9/00Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/20Wind motors characterised by the driven apparatus
    • F03D9/25Wind motors characterised by the driven apparatus the apparatus being an electrical generator
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D1/00Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D1/00Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06Rotors
    • F03D1/0608Rotors characterised by their aerodynamic shape
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D13/00Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D80/00Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/70Bearing or lubricating arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D9/00Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/10Combinations of wind motors with apparatus storing energy
    • F03D9/11Combinations of wind motors with apparatus storing energy storing electrical energy
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K7/00Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/18Structural association of electric generators with mechanical driving motors, e.g. with turbines
    • H02K7/1807Rotary generators
    • H02K7/1823Rotary generators structurally associated with turbines or similar engines
    • H02K7/183Rotary generators structurally associated with turbines or similar engines wherein the turbine is a wind turbine
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05BINDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2220/00Application
    • F05B2220/70Application in combination with
    • F05B2220/706Application in combination with an electrical generator
    • F05B2220/7066Application in combination with an electrical generator via a direct connection, i.e. a gearless transmission
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05BINDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2220/00Application
    • F05B2220/70Application in combination with
    • F05B2220/706Application in combination with an electrical generator
    • F05B2220/7068Application in combination with an electrical generator equipped with permanent magnets
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05BINDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00Components
    • F05B2240/20Rotors
    • F05B2240/21Rotors for wind turbines
    • F05B2240/221Rotors for wind turbines with horizontal axis
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05BINDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00Components
    • F05B2240/90Mounting on supporting structures or systems
    • F05B2240/91Mounting on supporting structures or systems on a stationary structure
    • F05B2240/912Mounting on supporting structures or systems on a stationary structure on a tower
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05BINDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2250/00Geometry
    • F05B2250/70Shape
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/728Onshore wind turbines
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E70/00Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30Systems combining energy storage with energy generation of non-fossil origin

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  • 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)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Wind Motors (AREA)

Abstract

本发明涉及一种风力涡轮机(11),所述风力涡轮机(11)包括:支撑结构(17),具有一个或更多个转子叶片(21)并且位于支撑结构(17)上使得其围绕转轴能够自由地转动的转子(13);以及连接到转子(13)并且当转子(13)转动时将风能转化为电能的发电机。支撑结构(17)包括静止环(15),转子(13)被可转动地引导到所述静止环上,并且发电机的定子位于该静止环上。

Description

风力涡轮机
技术领域
本发明涉及根据权利要求1的前序部分所述的风力涡轮机。
背景技术
根据现有技术的风力涡轮机包括塔架,在塔架的自由端处设置有容纳发电机的机器舱。在机器舱上安装有星形转子,所述星形转子在大多数情况下包括三个转子叶片并且能够围绕水平的中心轴转动。转子的转矩是借助于转子轴,通过齿轮而直接或间接地传递到发电机的。由于转子叶片具有可达到85米的长度,所以巨大的机械力施加作用,使轴承和转子轴达到其机械极限。为了获得良好的效率,直驱式发电机的直径必须与转子的直径相匹配。具有这种中心支撑概念的风力涡轮机已达到其物理极限。
发明内容
基于所描述的现有技术的缺点,本发明的目的在于对具有改进的输出的通用风力涡轮机进行改善。特别地,本发明的目的在于,针对目前常见尺寸的风力涡轮机,使其机械应力降低,从而使用于修理和维护的工作减少。
所述目的通过一种风力涡轮机(WEA)来实现,其中支撑结构包括静止环,转子被可转动地引导到该静止环上,并且发电机的定子位于该该静止环上。由于设置有静止环,所以转子的机械负载并非集中在中心转轴上,而是能够分散到静止环的圆周上。因此,根据本发明的风力涡轮机的机械负载减小,从而导致对修理和维护的节省。此外,利用所提供的设计可以实现具有更长的转子叶片的风力涡轮机。这在利用现有技术的设计时是不可能实现的,因为现有技术的设计已经达到了其机械负载能力的极限。将静止环作为发电机的定子来使用,使得发电机能够被直接地集成到现有的转子-静止环系统中。由此,无需进行更加复杂的、将转子运动传递到发电机的机械传动。为此,优选地,发电机被设置在静止环和转子之间。
已经证明,当转子不与作为轴或转轴之一的机械元件连接时是有利的。转子因此也不与这些机械元件两者连接。在本专利申请的范围内,术语“轴”理解为一种用于传递转子的转动运动和转矩并且用于支承转子的杆状机械元件。转轴应当理解为一种不传递转矩的杆状机械元件。由于转子被引导在静止环上,因此能够省去杆状的转子轴或转子转轴。转子的机械负载由此不会被集中地传递到轴或转轴,而是能够被分散到具有更大直径的静止环上。
在本发明的一个特别优选的实施例中,转子包括经由多个滚子轴承或滚动元件支撑在静止环上的转子环。滚动元件能够被设计为轮子或滚子。在风力涡轮机的情况下难免会发生的高机械负载在根据本发明的风力涡轮机的情况下能够分散到静止环的圆周上。因此,负载不必仅由少数几个滚子轴承来承担,而是能够被分散到许多较小的滚子轴承上。滚子轴承的滚动元件能够是圆筒、滚子、滚筒、球体、锥体等。
在本发明的一个实施例中,转子包括通过磁力以悬浮方式支撑在静止环上的转子环。尤其对于高机械负载而言,磁悬式支撑是有利的,因为这种支撑概念不会经受机械磨损。由此,所增加的投资成本能够被快速地分期清偿。
本发明的特征尤其在于,发电机被集成到滚子轴承中,或者滚子轴承被机械地连接到发电机。因此,可以使用不只一个发电机来转化电能,而是能够将许多较小的发电机都连接到滚子轴承。这具有的优势在于,因为滚子轴承无论如何都存在,所以能够非常容易地建立与转子环的耦合。另一优势在于,分别根据风况能够容易地接通和断开发电机。
已经证明,当将转子的转动运动传递到滚子轴承的至少一个圆周轨道沿圆周方向被固定到转子时是有利的。为此,转子环无需具有滚动元件能够在其上滚动的精密加工的工作表面。设计为圆形的该轨道能够被容易地且成本效益高地制造,并且能够被快速地集成到转子环中。
在另一优选实施例中,转子的直径与转子叶片的长度的比值为1:2,优选为1:1.5,特别优选为1:1。尽管通过这些比例所得出的转子环的直径是相对较大的,但是用于对风加以利用的表面仅比具有相同转子直径的常规风力涡轮机小10%。大的转子环能够尤其好地承担高机械负载。例如,对于同样为50m的转子叶片的长度而言,转子环的优选尺寸为50m。
出于具有大的转子环的缘故,根据本发明的具有三个转子叶片的风力涡轮机没有达到其机械极限,所以也能够使用三个以上的转子叶片,和/或增加转子叶片的长度。因此可以想到,根据本发明的风力涡轮机能够提供高达20兆瓦的功率。
有利地,滚子轴承的至少两个圆周轨道位于静止环上,以便能够更好地分散由大的转子所引起的机械负载。
在本发明的另一优选实施例中,发电机的线圈位于静止环中。因此,特别容易提取所产生的电流,并且能够省去滑动集电器。
相反地,当发电机的磁体位于转子中时是有利的。特别是当磁体是永磁体时,转子无需与风力涡轮机的静止部分导线连接,从而使设计简化。
当由发电机产生的电能在静止环处能够被提取时是有利的。在不动部件处的电流的移除比在运动部件处更加容易,特别是当运动部件、比如转子环非常大时。
有利地,支撑结构包括具有塔架和横梁的T形立柱,其中静止环被固定到横梁的端部,由此,静止环能够被可靠地支撑在支撑结构上,并且该支撑结构的风阻力仍然很小。
有利地,横梁能够围绕塔架的纵轴转动,使得风力涡轮机能够根据风而转动。
已经证明,当转子环在静止环外侧被设置在该静止环上时是有利的。转子环可以被安装到静止环上,并且可以例如在对轴承进行维护操作期间被从静止环拆掉。
附图说明
其他优势和特征从参照示意图对本发明的一个示例性实施例的如下描述得出,所述示意图未按真实比例示出。
图1示出风力涡轮机的轴测总体图;
图2示出支撑结构连同静止环的轴测图;
图3示出在静止环上转动的转子连同多个转子叶片的轴测图;以及
图4以局部剖视图示出风力涡轮机,用于说明转子轴承。
具体实施方式
图1和图4示出根据本发明的风力涡轮机的一个实施例,其总体上由附图标记11来表示。风力涡轮机(WEA)11包括转子13,其被支撑以使得其能够围绕静止环15转动。静止环15由T形立柱17来支撑或支持。
转子13包括转子环19和多个转子叶片21。转子环19优选地具有基本上对应于转子叶片的长度的直径。例如,转子环19的直径和转子叶片的长度分别为50米。尽管相对于转子叶片21的长度而言,转子环具有相当大的直径,但是转子环19的表面积仅为由转子叶片21的自由端所限定的圆的面积的10%。因此,可利用的风表面由于转子环19而仅略微减少。与用于现有技术的风力涡轮机的转子叶片的长度相比,转子叶片21的长度由此能够减小大约1/3,而可利用的风表面不会显著地减小。因此,由于转子叶片的材料成本较低,根据本发明的风力涡轮机11的材料成本能够显着降低。
转子环19被可转动地引导在静止环15的外侧。如图4所示,支撑能够由多个滚动元件23来承担。滚动元件23能够被可转动地容纳在静止环15的外侧上的凹部中,并且位于静止环15上的两个或更多个同轴轨道中。滚动元件23能够直接地在转子环19的内侧上的工作表面上滑动,或者间接地在导轨25上滑动。滚动元件23可以是轮子、滚子、滚筒、球体和其他可转动的对称体。导轨25被固定地连接到转子环19,并且将转子环19的转动运动转移到滚动元件23上。由转子叶片的重量所产生的高机械负载不会如传统的风力涡轮机的情况那样必须由中心支撑件来承担,而是能够分散到多个滚动元件23上。因此,用于风力涡轮机11的维修成本能够减少。还可以想到增加风力涡轮机11的转子叶片的长度,因为对于所述尺寸而言,滚动元件23的负载能力尚未达到其最大值。
还可以想到,通过使转子环19保持悬浮在静止环15上的磁力来将转子环19支撑在静止环15上。
将风能转化为电能的风力涡轮机11的发电机优选地位于转子环19和静止环15之间。因为对于发电机而言,只有磁场的相对于感应线圈的运动是重要的,所以,当发电机的定子位于无论如何都是静止的静止环15中是优选的。有利地,发电机的转子位于转子环19中。为了简化对所产生的电流的提取,在静止环15处进行对电流的提取是优选的,尽管也可以在转子环19处使用滑动元件来进行提取。对于简化的电流提取而言,发电机磁体因此位于转子环19中,并且感应线圈位于静止环15中。
也可以想到,将单个的发电机集成在滚动元件23中,或者将单个的发电机机械地连接到滚动元件23。根据风力,单个的发电机能够通过滚动元件23的转动传递而被接通或断开。
现有技术的风力涡轮机通常包括三个转子叶片。在根据本发明的风力涡轮机的情况下,由于其环形结构,转子叶片能够承受更高的机械负载,所以该数量能够增加。
T形立柱包括塔架27和横梁29。静止环15位于横梁29的端部。以这种方式能够实现足够稳定的安装,并且同时实现尽可能小的风阻力。
由于设置有静止环15和转子环19,机械力能够是分散的,并且不会像现有技术的风力涡轮机的情况那样作用于转轴的中心点。机械力能够分散在多个滚动元件上。
附图标记列表:
11 风力涡轮机
13 转子
15 静止环
17 立柱,支撑结构
19 转子环
21 转子叶片
23 滚动元件,滚子轴承
25 导轨
27 塔架
29 横梁

Claims (15)

1.一种风力涡轮机(11),所述风力涡轮机(11)包括:
-支撑结构(17);
-转子(13),其包括一个或更多个转子叶片(21)并且其位于所述支撑结构(17)上使得所述转子围绕转轴能够自由地转动;以及
-发电机,其连接到所述转子(13)并且当所述转子(13)转动时,所述发电机将风能转化为电能,
其中,所述支撑结构(17)包括静止环(15),所述转子(13)被可转动地引导到所述静止环(15)上,并且所述发电机的定子位于所述静止环上。
2.根据权利要求1所述的风力涡轮机,其中,所述转子(13)不与机械元件连接,所述机械元件是轴或转轴之一。
3.根据权利要求1或2所述的风力涡轮机,其中,所述发电机被设置在在所述静止环(15)和所述转子(13)之间。
4.根据权利要求1至3之一所述的风力涡轮机,其中,所述转子(13)包括经由多个滚子轴承或滚动元件(23)支撑在所述静止环(15)上的转子环(19)。
5.根据权利要求1至3之一所述的风力涡轮机,其中,所述转子(15)包括通过磁力以悬浮方式被支撑在所述静止环(15)上的转子环(19)。
6.根据权利要求4所述的风力涡轮机,其中,发电机被集成到所述滚子轴承(23)中,或者所述滚子轴承(23)被机械地连接到发电机。
7.根据权利要求4或6所述的风力涡轮机,其中,将所述转子(15)的转动运动传递到所述滚子轴承(23)的至少一个圆周轨道(25)沿圆周方向被固定到所述转子(13)。
8.根据前述权利要求之一所述的风力涡轮机,其中,所述转子的直径与所述转子叶片的长度的比值为1:2,优选为1:1.5,并且特别优选为1:1。
9.根据前述权利要求之一所述的风力涡轮机,其中,所述转子叶片(21)的数量为至少三个。
10.根据权利要求4或权利要求6至9之一所述的风力涡轮机,其中,所述滚子轴承(23)的至少两个圆周轨道位于所述静止环(15)上。
11.根据前述权利要求之一所述的风力涡轮机,其中,所述发电机的线圈位于所述静止环(15)中。
12.根据前述权利要求之一所述的风力涡轮机,其中,所述发电机的磁体位于所述转子(13)中。
13.根据前述权利要求之一所述的风力涡轮机,其中,由所述发电机产生的电能在所述静止环(15)处能够被提取。
14.根据前述权利要求之一所述的风力涡轮机,其中,所述支撑结构包括具有塔架(27)和横梁(29)的T形立柱(17),所述静止环(15)被固定到所述横梁(29)的端部。
15.根据权利要求4至14之一所述的风力涡轮机,其中,所述转子环(19)在所述静止环(15)外侧被设置在所述静止环(15)上。
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