CN104736841A - 带有降噪装置的风力涡轮叶片 - Google Patents
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- 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
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/0608—Rotors characterised by their aerodynamic shape
- F03D1/0633—Rotors characterised by their aerodynamic shape of the blades
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- 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
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/065—Rotors characterised by their construction elements
- F03D1/0675—Rotors characterised by their construction elements of the blades
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- 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
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
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- 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
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Abstract
一种风力涡轮叶片(1),所述风力涡轮叶片包括呈锯齿状后缘(3)形式的降噪装置,其中所述锯齿状后缘(3)包括加强肋(7)。
Description
技术领域
本发明涉及一种带有呈锯齿状后缘形式的降噪装置的风力涡轮叶片。
背景技术
当风力涡轮运行并且转子处于旋转运动时,风力涡轮的叶片会产生空气动力学噪声。通常,用于提升翼型的空气动力学噪声源机制可分为如下几类:a)从后缘脱落的湍流边界层气流;b)分离的边界层和失速翼型流;c)由于层流边界层的不稳定导致的漩涡脱落;d)来自钝后缘上的漩涡脱落。
已经发现,空气动力学噪声的主要源产生在风力涡轮叶片的外部跨度的后缘。一个令人惊讶的发现是来自叶片尖端的噪声是不重要的。还发现,由叶片产生的噪声正比于在叶片处的风速(即,转速)。
噪声限制了风力涡轮可以安装到居民区的距离远近以及风力涡轮的转子可以以多大的旋转频率进行旋转。
众所周知,在设计阶段为了降低空气动力学噪声需要优化风力涡轮叶片。作为翻新或在制造之后将降噪装置附接到风力涡轮叶片的后缘上是风力涡轮领域公知的。降噪装置的一个例子是附接在风力涡轮叶片的后缘处的锯齿状的塑料板,其作为翻新包装的一部分。
在风力涡轮叶片上附接小翼或者制造具有小翼的风力涡轮叶片是降低风力涡轮叶片的噪声的另一种手段。
EP1314885A1公开了一种用于风力涡轮转子的叶片的柔性锯齿状后缘。为了提高现有风力涡轮转子的效率,提出了将锯齿状板附接在风力涡轮叶片的后缘的至少一部分上。通过使用锯齿状后缘,升力面的升力和阻力特性可得以提高。
EP0652367A1提出了具有带有锯齿形状的后缘的风力涡轮。为了得到这种形状,可以使用锯齿形的条,其被固定到转子叶片的后缘。
US2008/0166241A1公开了一种风力涡轮叶片刷子,其中鬃毛或刷子装在风力涡轮叶片的外表面上。鬃毛的作用是实现降噪作用。鬃毛可以设置为沿着叶片的纵向方向的至少一排或者在后缘的附近。
DE10340978B1类似地公开了一种具有附接到后缘的刷子的风力涡轮叶片,其中刷子的每根纤维都分叉。刷子的分叉模仿猫头鹰的羽毛。
发明内容
本发明的目的在于提供一种带有高效降噪装置的风力涡轮叶片。
根据本发明,在上述风力涡轮叶片中这样实现该目的:所述锯齿状后缘包括加强肋。
加强肋被设置在所述锯齿状后缘上,使得所述锯齿状后缘的横向凸起部配有加强肋。锯齿状后缘基本上是装配在叶片的一侧上的基板。所述加强肋从锯齿状后缘的表面竖直地延伸。
在本发明的涡轮叶片中,优选的是,加强肋的直径朝着后缘的外端逐渐减小。这种形状适合于作用力并保持所述锯齿状后缘的一定刚度,这防止了不想要的振动。
根据本发明的风力涡轮叶片的进一步改进,该加强肋具有倒圆边缘。倒圆边缘已被证实在声学和空气动力学性能方面产生优良的结果。
特别优选的是,锯齿状后缘包括多个齿,其中每个齿都设置有加强肋。通过使用上述齿,锯齿状后缘的柔性和刚度可以以可控的方式变化。优化的附加因素是加强肋的材料特性。因此,通过成形以及选择一定的材料成分可以获得特定的刚度。
在本发明的涡轮叶片中,所述加强肋优选地平行地对齐。因此,多个或全部的加强肋可以侧向对齐。
根据本发明,所述加强肋可以设置在范围在整个跨度的大约70%到100%的区域内。优选地,加强肋被设置在整个跨度的75%到95%之间。在这个区域中附接加强肋已展示在减少空气动力学噪声方面的最佳结果。
为了简化加强肋的制造,可以设想到所述加强肋是由3D打印机来打印制造。这项制造技术允许加强肋在结构内有不同的刚度。然而作为一种替代方法,加强肋可以由铸造塑料制造,或者通过板被切出和加工得到。
本发明还涉及一种风力涡轮,所述风力涡轮包括塔架、带有转子轴的发电机以及连接风力涡轮叶片的轮毂。
本发明的风力涡轮包括所述本发明的风力涡轮叶片。
当结合优选实施例的下述详细描述考虑时,将会更好地理解本发明及其蕴含的原理。
附图说明
在附图中:
图1是本发明中的风力涡轮叶片的俯视图;
图2是锯齿状后缘的透视图;以及
图3是图2中的锯齿状后缘的剖面图。
具体实施方式
图1是风力涡轮叶片1的俯视图,风力涡轮叶片1带有叶片根部2,所述叶片根部用于将所述叶片1连接到转子的轮毂,所述轮毂是发电机的一部分。进一步地,风力涡轮叶片1包括后缘3、前缘4以及叶片尖端5。
风力涡轮叶片1包括呈带有加强肋7的锯齿状后缘3形式的降噪装置。
图2是锯齿状后缘3的透视图。从图2中可以看出,锯齿状后缘3包括“齿”6,其从风力涡轮叶片1侧向地延伸,其中每个齿设置有加强肋7。从图2中可以看到,加强肋7具有朝向其外端减小的直径。多个或全部加强肋7平行地设置,并且为了影响降噪效果,可修改所述加强肋的尺寸和直径。类似地,相邻的齿6之间的尺寸和距离可以被选择以便获得特定的空气动力学和降噪效果。
加强肋7加强并增固了后缘3上的锯齿,因此可以对抗锯齿的振动或者形变。在传统的风力涡轮叶片中,振动会导致颤振和额外的噪声。锯齿的弯曲会改变翼型的形状并且会导致不利的空气动力学性能和额外的噪声。这些不想要的作用可以通过使用上述加强肋7而可得以避免,其中锯齿状后缘3的每个齿6设置有加强肋7。使用倒圆边缘进一步减少噪声的排放。
当使用加强肋7时,用于齿6的基体材料与没有加强肋的情况相比会更加柔性。加强肋7可以按照不同的方式来定尺寸以便实现齿6的所需刚度。更进一步地,加强肋7可成形从而提供有利的空气动力学性能。
图3是设置有加强肋7的后缘3的剖面图。从剖面图中可以看到,加强肋7具有倒圆边缘并且后缘3具有朝向两侧逐渐减少的厚度。
在本实施例中,加强肋7通过3D打印机而打印制造。如果有必要,使用这种制造技术可以制造出略微不同外形、尺寸和不同刚度的多个加强肋7。加强肋7由塑料材料制成。
使用在作为降噪装置的锯齿状后缘3处的加强肋7显著改善了在风力涡轮叶片的旋转期间的噪声的排放。更进一步地,可以增大转子的旋转频率和/或转子的直径,以便能够使风力涡轮的运行更高效。降噪的另一积极效果是,风力涡轮可被安装在更靠近居民区的地方。
尽管结合优选实施例详细描述了本发明,但本发明不限于所公开的实施例,在不脱离本发明范围的情况下,本领域技术人员可以从所述实施例推导出其他的变形。
Claims (9)
1.一种风力涡轮叶片(1),所述风力涡轮叶片包括呈锯齿状后缘(3)形式的降噪装置,其特征在于,所述锯齿状后缘(3)包括加强肋(7)。
2.根据权利要求1所述的风力涡轮叶片,其特征在于,所述加强肋(7)的直径朝向所述后缘(3)的外端逐渐减小。
3.根据权利要求1或2所述的风力涡轮叶片,其特征在于,所述加强肋(7)具有倒圆的边缘。
4.根据前述权利要求中任一项所述的风力涡轮叶片,其特征在于,所述锯齿状后缘(3)具有齿(6),其中所述齿(6)设置有加强肋(7)。
5.根据前述权利要求中任一项所述的风力涡轮叶片,其特征在于,所述加强肋(7)平行地对齐。
6.根据前述权利要求中任一项所述的风力涡轮叶片,其特征在于,所述加强肋(7)设置在范围在跨度的大约70%到100%的区域内,优选地在跨度的75%到95%的区域内。
7.根据前述权利要求中任一项所述的风力涡轮叶片,其特征在于,所述加强肋(7)通过3D打印机被打印制造。
8.根据前述权利要求中任一项所述的风力涡轮叶片,其特征在于,所述加强肋(7)由铸造塑料制造,或者通过板被切出和加工得到。
9.一种风力涡轮,所述风力涡轮包括塔架、带有转子轴的发电机以及连接风力涡轮叶片(1)的轮毂,其特征在于,所述风力涡轮包括根据权利要求1至8中任一项所述的风力涡轮叶片(1)。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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EP12185651.2 | 2012-09-24 | ||
EP12185651 | 2012-09-24 | ||
PCT/EP2013/053799 WO2014044412A1 (en) | 2012-09-24 | 2013-02-26 | A wind turbine blade with a noise reducing device |
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US (1) | US10012207B2 (zh) |
EP (1) | EP2867523B1 (zh) |
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- 2013-02-26 EP EP13707346.6A patent/EP2867523B1/en not_active Revoked
- 2013-02-26 US US14/427,326 patent/US10012207B2/en active Active
- 2013-02-26 CN CN201380049837.9A patent/CN104736841A/zh active Pending
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CN104514690A (zh) * | 2013-09-18 | 2015-04-15 | 西门子公司 | 具有锯齿状延伸部的风轮机转子叶片 |
CN104514690B (zh) * | 2013-09-18 | 2019-10-18 | 西门子歌美飒可再生能源公司 | 具有锯齿状延伸部的风轮机转子叶片 |
CN105484946A (zh) * | 2015-11-23 | 2016-04-13 | 北京金风科创风电设备有限公司 | 叶片、叶片锯齿尾缘及其制造方法 |
CN110318940A (zh) * | 2016-02-12 | 2019-10-11 | Lm Wp 专利控股有限公司 | 用于风力涡轮机叶片的锯齿状后缘板 |
CN106168193A (zh) * | 2016-08-26 | 2016-11-30 | 广东明阳风电产业集团有限公司 | 一种风力发电机叶片的降噪结构 |
CN106168193B (zh) * | 2016-08-26 | 2018-12-21 | 明阳智慧能源集团股份公司 | 一种风力发电机叶片的降噪结构 |
CN109667712A (zh) * | 2019-02-28 | 2019-04-23 | 沈阳航空航天大学 | 一种鱼鳞式升阻转换型垂直轴风力机叶片及制作方法 |
Also Published As
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EP2867523B1 (en) | 2016-06-15 |
EP2867523A1 (en) | 2015-05-06 |
WO2014044412A1 (en) | 2014-03-27 |
ES2591209T3 (es) | 2016-11-25 |
DK2867523T3 (en) | 2016-09-05 |
US10012207B2 (en) | 2018-07-03 |
US20150247487A1 (en) | 2015-09-03 |
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