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Publication numberCN101705900 B
Publication typeGrant
Application numberCN 200910154589
Publication date29 Feb 2012
Filing date13 Nov 2009
Priority date13 Nov 2009
Also published asCN101705900A
Publication number200910154589.X, CN 101705900 B, CN 101705900B, CN 200910154589, CN-B-101705900, CN101705900 B, CN101705900B, CN200910154589, CN200910154589.X
Inventors俞小伟, 张旭, 朱芳, 李晓鹏, 王立, 董志勇, 韩伟, 颜效凡
Applicant浙江工业大学
Export CitationBiBTeX, EndNote, RefMan
External Links: SIPO, Espacenet
Novel blade used for ocean current power generation turbine
CN 101705900 B
Abstract
The invention provides a novel blade used for an ocean current power generation turbine. The blade comprises a wing root close to a turbine rotor and a wing tip far away from the rotor; the transverse section of the blade is of an NACA series airfoil type; and the chord length of the blade continuously changes from big to small from the wing root to the wing tip, and the thickness of the blade gradually becomes smaller from the wing root to the wing tip. The blade has the advantages of small deadweight, and high turbine efficiency, and can make the turbine get high rotary speed just by low-flow rate sea water, and avoid the cavitation erosion when the turbine rotates at a high speed.
Claims(2)  translated from Chinese
1. 一种新型的用于海流发电涡轮机的叶片,所述的叶片包括靠近涡轮机转子的翼根和远离所述的转子的翼梢,所述的叶片的横剖面采用NACA系列翼型;其特征在于:所述的叶片的弦长沿叶片的翼根向翼梢由大到小连续变化,叶片的厚度沿叶片的翼根向翼梢逐渐变薄;所述的叶片的后缘呈前凹的1/4的椭圆曲线,所述的叶片前缘笔直。 A new blade for ocean current power generation turbine, the blade comprising near the wing root and away from said rotor turbine rotor wing tip, using a cross-section of the blade airfoil NACA series; characterized in that: along the blade chord length of the blade legs of the continuous change from large to small to wingtip, the thickness of the blade along the blade of the wing root to wing tip tapers; the trailing edge of the front concave 1/4 of elliptic curves, the leading edge of the blade straight.
2.如权利要求1所述的一种新型的用于海流发电涡轮机的叶片,其特征在于:所述的叶片的翼梢与翼根的长度之比为1 : 3。 2. A new turbine blades for ocean current power generation according to claim 1, wherein: said vane than wingtip and wing root length is 1: 3.
Description  translated from Chinese

一种新型的用于海流发电涡轮机的叶片 A new blade is used for ocean current turbines

技术领域 Technical Field

[0001] 本发明涉及一种涡轮机的叶片,特别是一种用于海流发电涡轮机的叶片。 [0001] The present invention relates to a turbine blade, in particular for a turbine blade ocean current power generation. 技术背景 BACKGROUND

[0002] 海流能是清洁、可再生能源,采用海流能技术发电,有利于改善能源结构,降低化石能源消耗带来的环境污染和气候变化问题。 [0002] current energy is clean, renewable energy, power generation using ocean current energy technology will help to improve the energy structure and reduce environmental pollution and climate change caused by fossil energy consumption. 海流能是海洋能中最易获得、最具灵活性的一种能源。 Current energy is the most readily available marine energy, an energy most flexible. 海流发电涡轮机就是通过海水的流动,推动涡轮机转动,将海水的动能转化成为涡轮机的机械能。 Currents that flow through the turbines of the sea, to drive the turbines to rotate, the kinetic energy into the sea became turbine mechanical energy. 其中,涡轮机的效率、空化性能和稳定性是影响发电机组性能的三项重要指标。 Among them, the efficiency, cavitation performance and stability turbines are three important performance indicators of the impact of turbines.

[0003] 空化是流动液体特有的一种物理现象,它是因液体中局部压力低于该温度下的汽化压力时产生空泡的一种流体动力学现象,水力机械中的空化汽蚀会带来严重后果。 [0003] The liquid flow cavitation is a physical phenomenon unique, it is to produce a fluid cavitation due to fluid dynamics phenomena partial pressure is below the vapor pressure at that temperature, the hydraulic machinery cavitation cavitation It will bring serious consequences. 空化会导致流动不稳定,产生剧烈振动和噪声,降低其水力性能,使材料表面产生空蚀破坏,降低使用寿命。 Cavitation can cause flow instability, excessive vibration and noise, reducing its hydraulic performance, the material surface cavitation damage, reduce the life. 在涡轮机运行中,通常在空化程度还不足以对涡轮机工作特性产生可测影响前,空化就已经开始。 Before the operation of the turbine, usually not enough to produce the measured effect on the operating characteristics of the turbine cavitation level, cavitation has already begun. 由于水力机械中的水流是比较复杂的,空化现象可以出现在不同的部位及在不同条件下形成空化,在涡轮机转轮流道内及在其过流部件的局部表面上,往往会发生空化而后引起空蚀。 Since the hydraulic machinery flow is relatively complex, cavitation can occur in different parts and formed under different conditions of cavitation, the turbine rotor turns and on its flow components of the local surface, tends to occur within road cavitation then cause cavitation. 轻微的只在叶片表面形成少量蚀点,严重的叶片空蚀区的金属材料被大量剥蚀,致使表面成蜂窝状,甚至有使叶片穿孔或掉边的现象,严重威胁着机组的安全运行。 Slight formed only in a small amount of leaf surface pitting, severe cavitation zone blade metal material is a lot of erosion, causing the surface of a honeycomb, perforated or even the blade edge off phenomenon, a serious threat to the safe operation of the unit.

[0004] 现有的涡轮机叶片采用等弦长、等厚度的二维翼型剖面,这种二维叶片的自重大, 海水推动叶片转动消耗的能量大,致使涡轮机海水动能转化为机械能的效率低,且需要高流速的海水才能使涡轮机获得高转速,叶片容易发生空化空蚀。 [0004] using conventional turbine blade chord length, etc., and other cross-sectional thickness of the airfoil, since the two-dimensional blade that significant, rotating blades push water consumed energy is large, resulting in the turbine water kinetic energy into mechanical energy inefficient and it requires a high flow rate of the water to the turbine for high speed, blade prone to cavitation.

发明内容 DISCLOSURE

[0005] 为克服现有技术的叶片自重大,涡轮机海水动能转化为机械能的效率低,需要高流速的海水才能使涡轮机获得高转速,叶片容易发生空化空蚀的缺点,本发明提出一种叶片自重小、涡轮机的效率高,不发生空化空蚀,只需低流速海水即可使涡轮机获得高转速的用于海流发电涡轮机的叶片。 [0005] In order to overcome the blades of the prior art since the major turbine seawater kinetic energy into mechanical energy inefficient, requiring high flow rates of the water to the turbine for high speed, blade prone to cavitation of the shortcomings, the present invention provides a blade weight, high efficiency turbines, cavitation does not occur, only the low velocity seawater can get for the turbine blades of the turbine ocean current power generation high speed.

[0006] 一种新型的用于海流发电涡轮机的叶片,所述的叶片包括靠近涡轮机转子的翼根和远离所述的转子的翼梢,所述的叶片的横剖面采用NACA系列翼型;其特征在于:所述的叶片的弦长沿叶片的翼根向翼梢由大到小连续变化,叶片的厚度自叶片的翼根向翼梢逐渐变薄。 [0006] A new blade for ocean current power generation turbine, said blade comprises a turbine rotor close to the wing root and a wing tip away from the rotor, the use of a cross-section of the blade airfoil NACA series; its wherein: the blade chord length along the descending blade legs varies continuously to wingtip, the thickness of the blade from the blade legs tapers to wingtip.

[0007] 进一步,所述的叶片的后缘呈前凹的1/4的椭圆曲线,所述的叶片的前缘笔直。 [0007] Further, the trailing edge of said blade elliptical concave front curve 1/4, the leading edge of the blade straight.

[0008] 进一步,所述的叶片的翼梢与翼根的长度之比为1 : 3. [0008] Further, the ratio of the vane wingtip and wing root length is 1: 3.

[0009] 本发明的构思是:将叶片自翼根向翼梢弦长逐渐变短、厚度逐渐变薄,缩小了叶片的体积、减轻了叶片自重,提高了涡轮机将海水动能转变为机械能的效率,即使海水流速较低,涡轮机也能获得高转速。 [0009] The concept of the present invention are: the blade from the wing root to wing tip chord progressively shorter, thickness gradually thinning, reducing the size of the blade, reducing blade weight, improved turbine seawater kinetic energy into mechanical energy efficiency , even if the water flow rate is low, the turbine can be obtained a high speed. [0010] 叶片后缘沿翼根向翼梢的方向、按照1/4椭圆曲线渐缩,使得叶片的过流面积减小了一半以上,叶片的过流面积越小,则叶片更容易被超空化发生时的空穴完全包裹,因空化和空蚀发生的位置不一样,从而避免高转速下叶片表面被空蚀。 [0010] the blade trailing edge wing root toward the wing tip, according to the quarter-elliptic curve tapered so that the blades of the flow area is reduced by more than half, the smaller the flow area of the blade, the blade is more likely to be over Cavitation occurs when the hole completely wrapped, the position due to the occurrence of cavitation and cavitation is not the same, so as to avoid the blade surface at high speed cavitation.

[0011] 本发明具有叶片自重小、涡轮机的效率高,只需低流速海水即可使涡轮机获得高转速的,且避免涡轮机在高转速时叶片发生空蚀。 [0011] The present invention having a blade weight, high efficiency turbine, just low velocity seawater can enable the turbine to obtain high speed, and to avoid the occurrence of cavitation turbine blades at high speed.

附图说明 Brief Description

[0012] 图1为本发明的立体示意图 [0012] FIG. 1 perspective view of the present invention.

[0013] 图2为本发明的横剖面示意图 [0013] FIG. 2 a cross-sectional schematic view of the present invention.

[0014] 图3为本发明的纵剖面示意图 [0014] FIG. 3 is a schematic vertical cross-sectional schematic view of the invention

[0015] 图4为采用实施例二得出海水流速与涡轮机转速的关系图 [0015] FIG. 4 is obtained using the embodiment of the two seawater flow rate of the turbine speed diagram

[0016] 图5为采用实施例二得出的涡轮机转速与空化数的关系图 [0016] FIG. 5 for the introduction of the turbine speed and cavitation number embodiments of two drawn diagram

具体实施方式 DETAILED DESCRIPTION

[0017] 实施例一 [0017] Embodiment 1

[0018] 参照图1-3 [0018] Referring to FIGS. 1-3

[0019] 一种新型的用于海流发电涡轮机的叶片,所述的叶片1包括靠近涡轮机转子的翼根11和远离所述的转子的翼梢12,所述的叶片1的横剖面采用NACA系列翼型;其特征在于:所述的叶片1的弦长沿叶片的翼根11向翼梢12逐渐变短,叶片1的厚度沿翼根向翼梢逐渐变薄。 [0019] A new blade for ocean current power generation turbine, said blade 1 comprises a turbine rotor near the wing root 11 and the tip away from the rotor 12, the cross-section of the blade 1 using the NACA Series airfoil; characterized in that: the chord length of the blade 1 along the blade legs 11 to the tip-12 gradually shorter, the thickness of the blade 1 along the wing root to wing tip tapers.

[0020] 所述的叶片1的前缘笔直13,所述的叶片1的后缘14为前凹的四分之一的椭圆曲线。 [0020] according to a straight blade leading edge 13, a trailing edge of the blade 14 of the front quarter of the elliptic curve concave.

[0021] 所述的叶片1的翼梢12与翼根11的长度之比为1 : 3. [0021] The ratio of the wing root 11 and the tip 12 of the blade 1, the length is 1: 3.

[0022] 本发明的构思是:将叶片1沿翼根11向翼梢12弦长15逐渐变短、厚度逐渐变薄, 缩小了叶片1的体积、减轻了叶片1自重,提高了涡轮机将海水动能转变为机械能的效率, 即使海水流速较低,涡轮机也能获得高转速。 [0022] The concept of the present invention are: the blade 1 along the wing root to wing tip 11 12 15 progressively shorter chord length, thickness gradually thinning, reducing the size of the blade 1, reducing the weight of the blade 1, the turbine will increase the sea kinetic energy into mechanical energy efficiency, even if the flow rate of water is low, the turbine can be obtained a high speed.

[0023] 叶片1后缘14沿翼根11向翼梢12的方向、按照1/4椭圆曲线渐缩,使得叶片1 的过流面积减小了一半以上,叶片1的过流面积越小,则叶片1更容易被超空化发生时的空穴完全包裹,因空化和空蚀发生的位置不一样,从而避免高转速下叶片1表面被空蚀。 [0023] The blade 1 along the trailing edge of the wing root 11 14 12 toward the wingtip, according to 1/4 elliptic curve tapered so that the flow area of the blade is reduced by more than half, the smaller the flow area of the blade 1, the blade 1 is more likely to be super-cavitation hole completely wrapped occurs, the position due to the occurrence of cavitation and cavitation is not the same, so as to avoid high-speed surface-blade is cavitation.

[0024] 实施例二 [0024] Second Embodiment

[0025] 参照图4、5,结合实际情况,说明本实施例: [0025] Referring to FIG. 4 and 5, with the actual situation, description of the embodiment:

[0026] 以下以翼型弦长c为单位1,对本发明的具体实施方式作进一步的描述。 [0026] In the following airfoil chord c of the unit 1, a specific embodiment of the present invention will be further described.

[0027] 叶片的横剖面采用NACA4415翼型,最大弯度f是弦长的4%,最大弯度位置〜离前缘为弦长的40%,最大厚度d是弦长的15%。 [0027] The cross section of the blade airfoil using NACA4415, the maximum camber f is 4% of the chord length, the maximum camber position from the leading edge of ~ 40% of the chord length, the maximum thickness d is 15% of the chord.

[0028] 叶片采用在纵剖面上翼梢与翼根的长度之比为1 : 3的椭圆翼型,翼梢长度 [0028] The blades are wing tip and a longitudinal section over the length of the wing root for the 1: 3 elliptical airfoil tip-length

a约为0. 333,翼根长度b为1,前缘1为垂直直线,后缘渐变线2为四分之一椭圆曲线2 2 ^^ + ! = 1。 a is about 0.333, b is a length of the wing root, the leading edge of a vertical line, the trailing edge gradient line is a quarter elliptic curve 2 ^ ^ 22 +! = 1. 0.667 aa 0.667 aa

[0029] 试验表明,采用现有的等弦长、等厚度的二维翼型剖面叶片时,涡轮机将海水动能 [0029] The tests showed that the use of existing chord, etc., etc. The thickness of the blade airfoil cross-section, the turbine seawater kinetic energy

4转化为机械能的平均转化效率为37%。 4 is converted to mechanical energy conversion efficiency on average 37%. 采用本发明的叶片时,涡轮机将海水动能转化为机械能的最大转化效率可达56 %,平均转化效率为45 %。 When using the blade of the present invention, the water turbine kinetic energy into mechanical energy conversion efficiency of up to a maximum of 56%, an average conversion efficiency of 45%.

[0030] 本说明书实施例所述的内容仅仅是对发明构思的实现形式的列举,本发明的保护范围不应当被视为仅限于实施例所陈述的具体形式,本发明的保护范围也及于本领域技术人员根据本发明构思所能够想到的等同技术手段。 [0030] The contents of this specification are merely the embodiment of the inventive concept of realization in the form of lists, the scope of the present invention should not be seen as limited to the embodiments of specific forms set forth, the scope of the present invention is also and in equivalent technical means skilled in the art in accordance with the inventive concept could think of.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
CN101300419A17 Oct 20065 Nov 2008Lm玻璃纤维制品有限公司Blade for a wind turbine rotor
Non-Patent Citations
Reference
1张雅文等.轴流式水轮机叶片端面缝隙无汽蚀几何形状设计探讨.《节能技术》.1987,(第6期),6-9.
Classifications
International ClassificationF03B3/12
Cooperative ClassificationY02E10/223
Legal Events
DateCodeEventDescription
12 May 2010C06Publication
30 Jun 2010C10Request of examination as to substance
29 Feb 2012C14Granted