WO2020118692A1 - 一种风机叶片加长组件 - Google Patents

一种风机叶片加长组件 Download PDF

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Publication number
WO2020118692A1
WO2020118692A1 PCT/CN2018/121223 CN2018121223W WO2020118692A1 WO 2020118692 A1 WO2020118692 A1 WO 2020118692A1 CN 2018121223 W CN2018121223 W CN 2018121223W WO 2020118692 A1 WO2020118692 A1 WO 2020118692A1
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WIPO (PCT)
Prior art keywords
blade
shell
tip
assembly
axis
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PCT/CN2018/121223
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English (en)
French (fr)
Inventor
辛克锋
时文刚
刘峰
张磊
张羽
Original Assignee
中国大唐集团新能源股份有限公司
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Application filed by 中国大唐集团新能源股份有限公司 filed Critical 中国大唐集团新能源股份有限公司
Priority to PCT/CN2018/121223 priority Critical patent/WO2020118692A1/zh
Publication of WO2020118692A1 publication Critical patent/WO2020118692A1/zh

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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
    • 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 the field of wind power, in particular to a fan blade lengthening assembly.
  • the technical problem to be solved by the present invention is to overcome the shortcomings of the prior art, and to provide a fan blade lengthening assembly, the purpose of which is that the fan blade lengthening assembly can be installed on an existing fan blade to increase the sweeping area and improve the wind turbine
  • the output power thus increases the amount of power generation, and its other purpose is to prevent the blade from deflecting at the tip of the blade and causing the blade to contact the tower after the blade grows.
  • a fan blade extension assembly includes an end with an opening at one end and a tip closed at one end.
  • the blade extension assembly extends along the length of the blade extension assembly axis from the end to the tip.
  • the tip of the blade extension assembly is inclined and A certain angle is formed between the extending direction of the axis of the blade extension assembly, and the inclined direction of the tip is toward the windward surface of the blade during operation.
  • tip portion of the blade extension assembly is bent and extends perpendicular to the axis extension direction, and the bending direction is toward the windward surface of the blade during operation.
  • the blade extension assembly includes a housing provided on the outside, the housing includes a first shell on the windward side and a second shell on the leeward side when the blade extension assembly is in operation, the first shell and the second shell In a snap-fit connection, the tip of the first shell and the tip of the second shell are bent and extended perpendicularly to the axis extension direction toward the windward side.
  • the tip of the first housing is curved inwardly from parallel to the axis direction and perpendicular to the axis direction.
  • tip portion of the second housing is convexly curved outward from parallel to the axis direction and perpendicular to the axis direction.
  • center of curvature of the first shell and the center of curvature of the second shell are located on the windward side, and the bending radius of the second shell is larger than the bending radius of the first shell.
  • the blade lengthening assembly includes a main beam disposed inside the casing, and the main beam extends from the end of the casing toward the tip portion beyond the bent portion to increase the strength of the blade tip portion.
  • the main beam is disposed in the cavity between the first shell and the second shell, and the main beam extends along the blade shell to the tip of the blade lengthening assembly; preferably, the bending radius of the main beam Greater than the bending radius of the first shell, the bending radius of the main beam is smaller than the bending radius of the second shell.
  • the tip of the blade lengthening assembly is hollow to form a cavity, and the interior of the cavity is provided with a lightning receptor bracket.
  • the lightning receptor bracket includes a support rod and a support seat sleeved on the support rod, and one end of the support rod is connected Lightning protection cable, the other end is connected to the lightning receptor.
  • the support seat is detachably fixed on the inner wall of the chamber facing the blade tip, the inner wall is provided with a groove, the support rod is connected to the flashlight and extends into the groove, and the support seat sleeved on the support rod Fix on the inner wall to stabilize the lightning receptor.
  • the present invention has the following beneficial effects compared with the prior art.
  • Adding a blade extension assembly to the existing fan blade can lengthen the blade length, increase the sweep area, increase the power output of the wind turbine and thereby increase the power generation; by bending the blade tip, the tip of the blade extension assembly Bending to the windward surface, so that the blade tip will not be greatly distorted in the case of wingspan vibration, which solves the problem of large deflection at the blade tip and avoids the blade from contacting the tower and damaging the tower or Blade; the blade tip of the blade lengthening assembly fixes the air-termination through the air-termination support, which is easy to operate.
  • FIG. 1 is a side view of the fan blade lengthening assembly in the embodiment of the present invention.
  • FIG. 2 is a front view of the fan blade lengthening assembly in the embodiment of the present invention.
  • FIG. 3 is a schematic view of the tip structure of the blade lengthening assembly in the embodiment of the present invention.
  • FIG. 4 is a schematic diagram of the installation structure of the air-termination system in the embodiment of the present invention.
  • FIG. 5 is a schematic diagram of the structure of the fan in the embodiment of the present invention.
  • FIG. 6 is an improved end view of the existing fan blade in the embodiment of the present invention.
  • FIG. 7 is a schematic view of the installation of the tip of the blade lengthening assembly in the embodiment of the present invention.
  • FIG. 8 is a structural view of the tip of the blade lengthening assembly in the embodiment of the present invention.
  • FIG. 9 is a schematic view of the installation of small blades in an embodiment of the present invention.
  • connection should be understood in a broad sense, for example, it can be a fixed connection or a detachable Connected, or connected integrally; either mechanically or electrically; directly or indirectly through an intermediary.
  • connection should be understood in specific situations.
  • a fan blade lengthening assembly 4 described in an embodiment of the present invention includes an end with an opening at one end and a pointed end closed at one end, and the blade lengthening assembly 4 is along the axis of the blade lengthening assembly From the end to the longitudinal direction of the tip, there is a certain angle between the tip inclination of the blade extension assembly 4 and the axis extension direction, and the tip inclination direction faces the windward surface when the blade is in operation.
  • the fan blade extension assembly 4 described in the embodiment of the present invention includes an end with an opening at one end and a tip closed at one end, and the axis of the blade extension assembly is along the length direction of the blade extension assembly 4 from the end to the tip Extending, the tip portion of the blade extension assembly is bent and extended perpendicular to the axis extension direction, and the bending direction is directed to the windward surface of the blade during operation.
  • the blade lengthening assembly 4 includes an outer casing provided.
  • the casing includes a first casing 10 on the windward side and a second casing 11 on the leeward side when the blade is in operation.
  • the first casing 10 and the second shell 11 are connected in a snap-fit manner, the tip of the first shell 10 and the tip of the second shell 11 are bent and extended to the windward side perpendicular to the axis extension direction, and the bent tip
  • the axis is perpendicular to the axis of the blade extension assembly.
  • the blade lengthening assembly 4 includes an outer casing, which includes a first casing 10 on the windward side of the blade during operation, and the casing extends from the end to the tip along the axis It extends to the flexion, the flexion curvature is on the windward side when the blade is in operation, and the tip of the first shell 10 is concavely curved from parallel to the axis direction and perpendicular to the axis direction.
  • the blade lengthening assembly 4 includes an externally disposed shell, and the shell includes a second shell 11 on the leeward side of the blade during operation, and the shell extends along the axis from the end to the tip The bending curvature extends to the windward side of the blade when the blade is in operation, and the tip of the second shell 11 protrudes outward from the parallel to the axis direction and perpendicular to the axis direction.
  • the center of curvature of the first shell 10 and the center of curvature of the second shell 11 are located on the windward side, and the bending radius of the second shell 11 is larger than the bending radius of the first shell 10.
  • the blade extension assembly 4 includes a main beam 8 disposed inside the casing, and the main beam 8 extends from the end of the casing to the tip portion beyond the bent portion to increase the strength of the blade tip portion.
  • the main beam is disposed in the cavity between the first shell 10 and the second shell 11, and the main beam 8 extends along the blade extension assembly shell to the tip of the blade extension assembly 4;
  • the bending radius of the main beam 8 is larger than the bending radius of the first shell 10, and the bending radius of the main beam 8 is smaller than the bending radius of the second shell 11.
  • the blade lengthening assembly 4 includes a main beam 8 disposed inside the shell, a rib plate is provided between the main beam 8 and the shell, and one end of the rib plate is clamped with the main beam 8 Connection or bonding, the other end of the rib plate is clamped or bonded to the housing.
  • the provision of ribs can improve the connection strength between the main beam 8 and the shell, and extend the service life of the fan blades.
  • the main beam 8 is disposed in the cavity between the first shell 10 and the second shell 11.
  • the main beam 8 extends along the blade extension assembly 4 shell to the tip of the blade extension assembly 4
  • the bending radius of the main beam 8 is greater than the bending radius of the first shell 10, and the bending radius of the main beam is smaller than the bending radius of the second shell 11.
  • the tip of the blade lengthening assembly 4 is provided with a lightning receptor 13, the tip is hollow to form a cavity 12, and the lightning receptor 13 is fixed to the cavity 12 at the tip by a lightning receptor bracket 14 .
  • the blade extension assembly 4 may be installed on the blade body assembly 3 of the existing fan, the blade extension assembly 4 is connected and fixed to the blade body assembly 3, and the blade extension assembly 4 is located in the The end of the blade extension assembly 4 is connected to the blade body assembly 3, and the shell of the blade extension assembly 4 is connected to the body shell 9 of the blade body assembly 3 at the end of the blade extension assembly 4
  • the main beam 8 of the blade extension assembly 4 is connected to the main body beam 7 of the blade body assembly 3 at the end of the blade extension assembly 4.
  • the tip portion of the blade lengthening assembly 4 described in this embodiment is hollow to form a cavity 12, and the interior of the chamber 12 is provided with a lightning receptor 13 fixed to the tip portion of the blade lengthening assembly 4 through a lightning receptor bracket 14. Inside the chamber 12.
  • the first shell 10 and the second shell 11 of the blade lengthening assembly 4 are snap-fitted to form a closed tip, and the tip is hollow to form a cavity 12, and a lightning receptor bracket 14 is provided inside the cavity 12,
  • the lightning receptor bracket 14 includes a support rod 17 and a support seat 16 sleeved on the support rod 17.
  • One end of the support rod 17 is connected to the lightning protection cable 15, and the other end is connected to the lightning arrester 13.
  • the lightning protection cable 15 passes through the blade
  • the extension assembly 4 and the blade body assembly 3 are grounded.
  • the support base 16 is detachably fixed on the inner wall of the chamber 12 facing the blade tip, the inner wall is provided with a groove, the support rod 17 is connected to the lightning receptor 13 and extends into the groove, the support base 16 is set on the support rod 17 and fixed on the inner wall to stabilize the lightning receptor 13, the support base 16 of the lightning receptor bracket 14 can be adhesively fixed in the cavity 12 of the blade tip, or through The fixed connection parts are fixed, such as bolts, etc., and the operation is simple.
  • a fan includes a tower 1, a hub 2, a blade, a transmission device, and a power generation device.
  • the blade includes a blade body assembly 3 and a blade extension assembly 4.
  • the blade extension assembly 4 is connected to the blade body assembly 3 at the end of the blade body assembly 3.
  • the blade body assembly 3 is a blade of an existing fan, and installing the blade extension assembly 4 on the blade body assembly 3 can increase the length of the blade, increase the sweep area, increase the ability to absorb wind energy, and improve power generation the amount.
  • the connecting end of the blade body assembly 3 and the blade extension assembly 4 is provided with an opening, and the main beam 8 in the blade body assembly 3 and/or the blade extension assembly 4 is elongated with another corresponding blade through the opening
  • the main beam 8 in the module or blade body assembly 3 is connected to improve the connection strength between the blade extension assembly 4 and the blade body assembly 3.
  • the blade body assembly 3 includes a body main beam 7 provided inside and a body shell 9 provided outside.
  • the end of the body shell 9 is provided with a first opening 5, and the blade is elongated
  • a second opening 6 is provided at the end of the assembly 4, and the main body beam 7 extends out of the first opening 5 and is connected to the second opening 6 of the blade lengthening assembly 4 to increase the length of the fan blade and improve power generation efficiency .
  • the blade lengthening assembly 4 includes a main beam 8 disposed inside and a shell disposed outside.
  • a second opening 6 is provided at an end of the shell, and the second opening 6 and the main body shell 9
  • the first opening 5 at the end of the is opposite, the main beam 8 is connected to the main body main beam 7, and the casing is connected to the main body casing 9.
  • Corresponding connections between the various structures make the connection stronger, to avoid excessive wind speed and the centrifugal force generated when the blades rotate to loosen the connection between the blade extension assembly 4 and the blade body assembly 3.
  • the second opening 6 of the housing and the first opening 5 of the main body housing 9 at least partially overlap, and the overlapping portions are bonded.
  • the outer surface of the connection is wound with a winding tape,
  • the winding tape is a glass fiber cloth to further play a fixing role.
  • the increase of the blade length increases the blade's backward deflection under aerodynamic loading, especially the maximum deflection of the blade tip.
  • the blade tip is closer to the fan tower. The deflection becomes significant, and the blades may contact the tower, and the tower impact may damage the tower or the blades, so that a repair or replacement process must be carried out to make the fan operate again.
  • the fan blades described in this embodiment are lengthened Component 4, effectively avoiding the above problems.
  • a fan blade extension assembly 4 includes an end with an opening at one end and a tip closed at one end.
  • the blade extension assembly 4 extends along the length of the blade extension assembly axis from the end to the tip.
  • the tip of the blade extension assembly is bent and extends perpendicular to the axis extension direction, and the bending direction is directed to the windward surface of the blade during operation.
  • the blade lengthening assembly 4 includes an outer casing, which includes a first casing 10 on the windward side and a second casing 11 on the leeward side when the blade is in operation.
  • the first casing 10 It is connected with the second shell 11 in a snap-fit manner.
  • the tip of the first shell 10 and the tip of the second shell 11 are bent and extend perpendicular to the axis extension direction toward the windward side.
  • the fan blade extension assembly 4 includes an end with an opening at one end and a tip closed at one end.
  • the axis of the blade extension assembly extends along the length of the blade extension assembly 4 from the end to the tip. There is a certain angle between the tip of the blade extension assembly and the axis extension direction, and the tip is inclined toward the first shell side.
  • the tip of the first housing 10 is concavely curved inwards from parallel to the axis direction and perpendicular to the axis direction.
  • the tip portion of the second housing 11 is convexly curved from parallel to the axis direction and perpendicular to the axis direction.
  • the center of curvature of the first shell 10 and the center of curvature of the second shell 11 are located on the windward side, and the bending radius of the second shell 11 is larger than the bending radius of the first shell 10.
  • the blade extension assembly 4 includes a main beam 8 disposed inside the casing, and the main beam 8 extends from the end of the casing to the tip portion beyond the bent portion to increase the strength of the blade tip portion.
  • the main beam 8 is disposed in the cavity between the first shell 10 and the second shell 11.
  • the main beam 8 extends along the blade extension assembly 4 shell to the tip of the blade extension assembly 4
  • the bending radius of the main beam 8 is greater than the bending radius of the first shell 10, and the bending radius of the main beam is smaller than the bending radius of the second shell 11.
  • the tip of the blade lengthening assembly 4 is hollow to form a cavity 12.
  • a lightning receptor bracket 14 Inside the cavity 12 is a lightning receptor bracket 14.
  • the lightning receptor bracket 14 includes a support rod 17 and a sleeve mounted on the support rod 17.
  • One end of the support base 16 and the support rod 17 is connected to the lightning protection line 15, and the other end is connected to the lightning receptor 13.
  • the first shell 10 and the second shell 11 of the blade lengthening assembly 4 are snap-fitted to form a closed tip, and the tip is hollow to form a cavity 12, and a lightning receptor bracket 14 is provided inside the cavity 12,
  • the lightning receptor bracket 14 includes a support rod 17 and a support seat 16 sleeved on the support rod 17.
  • One end of the support rod 17 is connected to the lightning protection cable 15, and the other end is connected to the lightning arrester 13.
  • the lightning protection cable 15 passes through the blade
  • the extension assembly 4 and the blade body assembly 3 are grounded.
  • the support base 16 is detachably fixed on the inner wall of the chamber 12 facing the blade tip, the inner wall is provided with a groove, and the support rod 17 is connected to the lightning receptor 13 and extends into the groove.
  • the blade extension assembly 4 includes an extension blade and an extension tip, and the extension tip is detachably installed at the end of the blade extension assembly 4.
  • the main beam 8 of the elongated blade is detachably connected to the main beam of the elongated tip, and the shell of the elongated blade and the shell of the blade extended tip are detachably engaged connection.
  • a third opening 19 is formed at the connection between the blade extension assembly 4 and the tip
  • a fourth opening 20 is formed at the connection between the tip and the extension blade, and the third opening 19 and the fourth opening 20 are opposite to each other.
  • the main beam of the elongated blade is connected to the main beam of the elongated tip, and the shell of the elongated blade is connected to the tip shell.
  • the joints of the elongated blade shell and the tip shell at least partially overlap, and the overlapping parts are bonded, and the outer surface of the joint is wound with a winding tape.
  • the tip of the tip is provided in a round shape, which reduces the resistance of the blade 21, and also prevents the worker from scratching the tip of the tip during operation and installation.
  • the tip of the blade extension assembly 4 is provided with small blades 21 parallel to the axis of the blade extension assembly, so as to increase the sweeping area of the fan and increase the power generation amount.
  • the casing of the pointed portion is provided with a slot into which the small blade 21 can be inserted, and the leaf surface of the small blade 21 is parallel to the axis of the elongated blade assembly 4.
  • the tip of the blade lengthening assembly 4 is provided with a plurality of small blades 21 arranged alternately along the axis of the tip.

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Abstract

一种风机叶片加长组件(4)，包括一端设有开口的端部和一端封闭的尖部，叶片加长组件(4)沿着叶片加长组件(4)轴线从端部到尖部的长度方向延伸，叶片加长组件(4)的尖部倾斜与叶片加长组件(4)轴线延伸方向之间形成一定的夹角，所述尖部倾斜方向朝向叶片工作时的迎风面。在现有风机叶片上加装叶片加长组件(4)，可以加长叶片长度，增大了扫风面积，提高了风力发电机组输出的功率从而提高发电量，通过叶尖折弯设置，解决了叶片尖部处发生较大偏转的问题，避免了叶片与塔架接触而损坏塔架或者叶片。

Description

一种风机叶片加长组件 技术领域
本发明涉及风电领域，尤其是一种风机叶片加长组件。
背景技术
近年来，风力已变为更加有吸引力的可选能源并且陆上或离岸的风机、风电厂等的数量已显著增多。在大型风力发电机组技术进入中国的早期，由于技术新、风险大，以及受叶片的制造工艺不成熟的限制，风电场开发商普遍采用保守策略，选择长度相对较短的叶片，短叶片虽然发电量小，但给机组带来的载荷也小，因此机组安全得到了最大保障。随着产业的发展，我国企业对风力发电机组的运行载荷有了越来越深刻的认识，逐渐能够更加精确地计算载荷，因而在同级别风速的风电场逐渐开始选择更长的叶片，以吸收更多风能从而提高投资发电收益，然而，已经采取保守策略而选择短叶片的风电场如果希望使用更长的叶片则需要重新采购叶片。这使得技术升级的成本过高，通常由于不具备技术升级的经济效益而无法进行。
但是，在增大风机叶片长度的情况下，叶片在空气动力学加载下的向后偏转也增大，其中通常在叶片的梢端处发生最大偏转。然而，当叶片旋转经过塔架时，叶片的梢端更加靠近风机塔架。诸如在不期望的高风况、高湍流情形等期间，如果叶片的偏转变得显著，则可能使叶片与塔架接触。塔架撞击可能损坏塔架或者叶片，使得必须实施修理或者更换过程以使风机再次操作。这些过程是昂贵的并且可能导致风轮机在长时间段内不可操作并且脱机，从而浪费风轮机所有者的宝贵的生产时间。
有鉴于此特提出本发明。
发明内容
本发明要解决的技术问题在于克服现有技术的不足，提供一种风机叶片加长组件，其目的在于风机叶片加长组件可加装在现有风机叶片上，增大扫风面积，提高风力发电机组输出的功率从而提高发电量，其另一目的在于，同时避免叶片增长后，叶片尖部处发生较大偏转使叶片与塔架接触。
为解决上述技术问题，本发明采用技术方案的基本构思是：
一种风机叶片加长组件，包括一端设有开口的端部和一端封闭的尖部，叶片加长组件沿着叶片加长组件轴线从端部到尖部的长度方向延伸，叶片加长组件的尖部倾斜与叶片加长组 件轴线延伸方向之间形成一定的夹角，所述尖部倾斜方向朝向叶片工作时的迎风面。
进一步，所述叶片加长组件的尖部垂直于轴线延伸方向弯折延伸，弯折方向朝向叶片工作时的迎风面。
进一步，所述叶片加长组件包括设置在外部的壳体，壳体包括叶片加长组件工作时迎风一侧的第一壳体和背风一侧的第二壳体，第一壳体和第二壳体相扣合连接，所述第一壳体的尖部和第二壳体的尖部垂直于轴线延伸方向向迎风一侧弯折延伸。
进一步，所述第一壳体的尖部由平行于轴线方向向垂直于轴线方向向内凹陷弯曲。
进一步，所述第二壳体的尖部由平行于轴线方向向垂直于轴线方向向外凸出弯曲。
进一步，所述第一壳体曲率中心和第二壳体的曲率中心位于迎风一侧，所述第二壳体的弯曲半径大于第一壳体的弯曲半径。
进一步，所述叶片加长组件包括设置在壳体内部的主梁，所述主梁由壳体端部向尖部延伸超过弯折部，以增加叶片尖部的强度。
进一步，所述主梁设置在第一壳体和第二壳体之间的空腔内，主梁沿着叶片壳体延伸至叶片加长组件的尖部；优选的，所述主梁的弯曲半径大于第一壳体的弯曲半径，所述主梁的弯曲半径小于于第二壳体的弯曲半径。
进一步，所述叶片加长组件的尖部中空形成腔室，腔室内部设有接闪器支架，所述接闪器支架包括支撑杆和套设在支撑杆上的支撑座，支撑杆的一端连接防雷线，另一端连接接闪器。
进一步，所述支撑座可拆卸的固定在腔室朝向叶尖的内壁上，所述内壁设有一凹槽，支撑杆连接接闪器伸入到凹槽内部，套设在支撑杆上的支撑座固定在内壁上，以稳固接闪器。
采用上述技术方案后，本发明与现有技术相比具有以下有益效果。
在现有风机叶片上加装叶片加长组件，可以加长叶片长度，增大了扫风面积，提高了风力发电机组输出的功率从而提高发电量；通过叶尖折弯设置，叶片加长组件的尖部向迎风面折弯设置，使得叶片尖部在翼展振动的情况下不会发生较大扭曲，解决了叶片尖部处发生较大偏转的问题，避免了叶片与塔架接触而损坏塔架或者叶片；叶片加长组件的叶尖部通过接闪器支架固定接闪器，操作简单。
下面结合附图对本发明的具体实施方式作进一步详细的描述。
附图说明
附图作为本发明的一部分，用来提供对本发明的进一步的理解，本发明的示意性实施例及其说明用于解释本发明，但不构成对本发明的不当限定。显然，下面描述中的附图仅仅是一些实施例，对于本领域普通技术人员来说，在不付出创造性劳动的前提下，还可以根据这些附图获得其他附图。在附图中：
图1是本发明实施例中风机叶片加长组件侧视图；
图2是本发明实施例中风机叶片加长组件主视图；
图3是本发明实施例中叶片加长组件的尖部结构示意图；
图4是本发明实施例中接闪器安装结构示意图；
图5是本发明实施例中风机结构示意图；
图6是本发明实施例中现有风机叶片改进后的末端图；
图7是本发明实施例中叶片加长组件的尖部的安装示意图；
图8是本发明实施例中叶片加长组件的尖部结构图；
图9是本发明实施例中小叶片安装示意图。
图中：1、塔筒；2、轮毂；3、叶片主体组件；4、叶片加长组件；5、第一开口；6、第二开口；7、主体主梁；8、主梁；9、主体壳体；10、第一壳体；11、第二壳体；12、腔室；13、接闪器；14、接闪器支架；15、防雷线；16、支撑座；17、支撑杆；18、凹槽；19、第三开口；20、第四开口；21、小叶片。
需要说明的是，这些附图和文字描述并不旨在以任何方式限制本发明的构思范围，而是通过参考特定实施例为本领域技术人员说明本发明的概念。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对实施例中的技术方案进行清楚、完整地描述，以下实施例用于说明本发明，但不用来限制本发明的范围。
在本发明的描述中，需要说明的是，术语“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有 特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。
如图1至图4所示，本发明实施例中所述的一种风机叶片加长组件4，包括一端设有开口的端部和一端封闭的尖部，叶片加长组件4沿着叶片加长组件轴线从端部到尖部的长度方向延伸，叶片加长组件4的尖部倾斜与轴线延伸方向之间设有一定的夹角，所述尖部倾斜方向朝向叶片工作时的迎风面。
本发明实施例中所述的一种风机叶片加长组件4，包括一端设有开口的端部和一端封闭的尖部，叶片加长组件轴线沿着叶片加长组件4从端部到尖部的长度方向延伸，所述叶片加长组件的尖部垂直于轴线延伸方向弯折延伸，弯折方向朝向叶片工作时的迎风面。
本发明实施例中，所述叶片加长组件4包括设置在外部的壳体，壳体包括叶片工作时迎风一侧的第一壳体10和背风一侧的第二壳体11，第一壳体10和第二壳体11相扣合连接，所述第一壳体10的尖部和第二壳体11的尖部垂直于轴线延伸方向向迎风一侧弯折延伸，弯折后的尖部轴线与所述叶片加长组件轴线相互垂直。
本发明实施例中，所述叶片加长组件4包括设置在外部的壳体，壳体包括叶片工作时迎风一侧的第一壳体10，所述壳体由端部至尖部沿着轴线方向延伸至弯折曲，弯折曲曲率在叶片工作时迎风一侧，所述第一壳体10的尖部由平行于轴线方向向垂直于轴线方向向内凹陷弯曲。
本发明实施例中，所述叶片加长组件4包括设置在外部的壳体，壳体包括叶片工作时背风一侧的第二壳体11，所述壳体由端部至尖部沿着轴线方向延伸至弯折曲，弯折曲曲率在叶片工作时迎风一侧，所述第二壳体11的尖部由平行于轴线方向向垂直于轴线方向向外凸出弯曲。
本发明实施例中，所述第一壳体10曲率中心和第二壳体11的曲率中心位于迎风一侧，所述第二壳体11的弯曲半径大于第一壳体10的弯曲半径。
本发明实施例中，所述叶片加长组件4包括设置在壳体内部的主梁8，所述主梁8由壳体端部向尖部延伸超过弯折部，以增加叶片尖部的强度。
本发明实施例中，所述主梁设置在第一壳体10和第二壳体11之间的空腔内，主梁8沿着叶片加长组件壳体延伸至叶片加长组件4的尖部；所述主梁8的弯曲半径大于第一壳体10的弯曲半径，所述主梁8的弯曲半径小于第二壳体11的弯曲半径。
本发明实施例中，所述叶片加长组件4包括设置在壳体内部的主梁8，所述主梁8与壳体之间设有肋板，所述肋板一端和所述主梁8卡接或粘接，所述肋板另一端和所述壳体卡接或粘接。设置肋板可提高主梁8与壳体之间的连接强度，延长风机叶片的使用寿命。
本发明实施例中，所述主梁8设置在第一壳体10和第二壳体11之间的空腔内，主梁8沿着叶片加长组件4壳体延伸至叶片加长组件4的尖部；所述主梁8的弯曲半径大于第一壳体10的弯曲半径，所述主梁的弯曲半径小于第二壳体11的弯曲半径。
本发明实施例中，所述叶片加长组件4的尖部安装接闪器13，所述尖部中空形成腔室12，接闪器13通过一接闪器支架14固定在尖部的腔室12。
本发明实施例中，所述叶片加长组件4可加装在现有风机的叶片主体组件3上，所述叶片加长组件4与叶片主体组件3相连接固定，所述叶片加长组件4在所述叶片加长组件4的端部与所述叶片主体组件3相连接，所述叶片加长组件4的壳体在所述叶片加长组件4的端部与所述叶片主体组件3的主体壳体9相连接，所述叶片加长组件4的主梁8在所述叶片加长组件4的端部与所述叶片主体组件3的主体主梁7相连接。
实施例一
如图4所示，本实施例所述的叶片加长组件4的尖部中空形成腔室12，腔室12内部设有接闪器13通过一接闪器支架14固定在叶片加长组件4尖部的腔室12内。
本实施例中，叶片加长组件4的第一壳体10和第二壳体11扣合连接形成封闭的尖部，尖部中空形成腔室12，腔室12内部设有接闪器支架14，所述接闪器支架14包括支撑杆17和套设在支撑杆17上的支撑座16，支撑杆17的一端连接防雷线15，另一端连接接闪器13，防雷线15穿过叶片加长组件4和叶片主体组件3接地。
本实施例中，所述支撑座16可拆卸的固定在腔室12朝向叶尖的内壁上，所述内壁设有一凹槽，支撑杆17连接接闪器13伸入到凹槽内部，支撑座16套设在支撑杆17上，并固定在内壁上，以稳固接闪器13，所述接闪器支架14的支撑座16可以粘接固定在叶片尖部的腔室12内，也可通过固定连接件固定，如螺栓等，操作简单。
实施例二
如图3所示，本实施例所述的一种风机，所述风机包括塔筒1、轮毂2、叶片、传动装置、发电装置，所述叶片包括叶片主体组件3和叶片加长组件4，所述叶片加长组件4在所述叶片主体组件3的端部与所述叶片主体组件3连接。所述叶片主体组件3为现有风机的叶片，将所述叶片加长组件4安装到所述叶片主体组件3上能够增加叶片的长度，增大扫风面积，增大吸收风能的能力，提高发电量。
本实施例中，所述叶片主体组件3与叶片加长组件4的连接端设有一开口，所述叶片主体组件3和/或叶片加长组件4内的主梁8通过该开口与另一对应叶片加长组件或叶片主体组件3内的主梁8连接，提高叶片加长组件4和叶片主体组件3之间的连接强度。
本实施例中，所述叶片主体组件3包括设置在内部的主体主梁7和设置在外部的主体壳体9，所述主体壳体9的端部设有第一开口5，所述叶片加长组件4的端部设有第二开口6，所述主体主梁7伸出所述第一开口5与所述叶片加长组件4的第二开口6连接，以增长风机叶片的长度，提高发电效率。
本实施例中，所述叶片加长组件4包括设置在内部的主梁8和设置在外部的壳体，所述壳体的端部设有第二开口6，第二开口6与主体壳体9的端部的第一开口5相对，所述主梁8和所述主体主梁7连接，所述壳体与所述主体壳体9连接。各个结构之间均对应连接使连接更牢固，避免风速过大和叶片转动时产生的离心力使对叶片加长组件4与叶片主体组件3的连接处松动。
本实施例中，所述壳体的第二开口6处与所述主体壳体9的第一开口5处至少部分重叠，重叠部分粘接，优选所述连接处的外表面缠绕设置缠绕带，所述缠绕带为玻璃纤维布进一步起到固定作用。
叶片长度的增加使叶片在空气动力学加载下的向后偏转增大，尤其是叶片的尖部处发生最大偏转，当叶片旋转经过塔架时，叶片的尖部更加靠近风机塔架，如果叶片的偏转变得显著，则可能使叶片与塔架接触，塔架撞击可能损坏塔架或者叶片，使得必须实施修理或者更换过程以使风机再次操作，本实施例中所述的一种风机叶片加长组件4，有效避免了上述问题。
本实施例中，一种风机叶片加长组件4包括一端设有开口的端部和一端封闭的尖部，叶片加长组件4沿着叶片加长组件轴线从端部到尖部的长度方向延伸，所述叶片加长组件的尖部垂直于轴线延伸方向弯折延伸，弯折方向朝向叶片工作时的迎风面。
本实施例中，所述叶片加长组件4包括设置在外部的壳体，壳体包括叶片工作时迎风一 侧的第一壳体10和背风一侧的第二壳体11，第一壳体10和第二壳体11相扣合连接，所述第一壳体10的尖部和第二壳体11的尖部垂直于轴线延伸方向向迎风一侧弯折延伸。
本实施例中，所述一种风机叶片加长组件4包括一端设有开口的端部和一端封闭的尖部，叶片加长组件轴线沿着叶片加长组件4从端部到尖部的长度方向延伸，所述叶片加长组件的尖部与轴线延伸方向之间设有一定的夹角，所述尖部向第一壳体一侧倾斜。
本实施例中，所述第一壳体10的尖部由平行于轴线方向向垂直于轴线方向向内凹陷弯曲。
本实施例中，所述第二壳体11的尖部由平行于轴线方向向垂直于轴线方向向外凸出弯曲。
本实施例中，所述第一壳体10曲率中心和第二壳体11的曲率中心位于迎风一侧，所述第二壳体11的弯曲半径大于第一壳体10的弯曲半径。
本实施例中，所述叶片加长组件4包括设置在壳体内部的主梁8，所述主梁8由壳体端部向尖部延伸超过弯折部，以增加叶片尖部的强度。
本实施例中，所述主梁8设置在第一壳体10和第二壳体11之间的空腔内，主梁8沿着叶片加长组件4壳体延伸至叶片加长组件4的尖部；所述主梁8的弯曲半径大于第一壳体10的弯曲半径，所述主梁的弯曲半径小于第二壳体11的弯曲半径。
本实施例中，叶片加长组件4的尖部中空形成腔室12，腔室12内部设有接闪器支架14，所述接闪器支架14包括支撑杆17和套设在支撑杆17上的支撑座16，支撑杆17的一端连接防雷线15，另一端连接接闪器13。
本实施例中，叶片加长组件4的第一壳体10和第二壳体11扣合连接形成封闭的尖部，尖部中空形成腔室12，腔室12内部设有接闪器支架14，所述接闪器支架14包括支撑杆17和套设在支撑杆17上的支撑座16，支撑杆17的一端连接防雷线15，另一端连接接闪器13，防雷线15穿过叶片加长组件4和叶片主体组件3接地。
本实施例中，所述支撑座16可拆卸的固定在腔室12朝向叶尖的内壁上，所述内壁设有一凹槽，支撑杆17连接接闪器13伸入到凹槽内部。
实施例四
如图7至图8所示，所述叶片加长组件4包括加长叶片和加长尖部，加长尖部可拆卸的安装在叶片加长组件4的末端。
本实施例中，所述加长叶片的主梁8和所述加长尖部之间的主梁可拆卸连接，所述加长叶片的壳体和所述叶片加长尖部的壳体可拆卸的扣合连接。
本实施例中，叶片加长组件4与尖部对应连接处形成第三开口19，所述尖部与加长叶片连接处形成第四开口20，所述第三开口19和第四开口20相对，所述加长叶片的主梁和加长尖部的主梁连接，所述加长叶片的壳体和尖部壳体连接。
本实施例中，所述加长叶片的壳体和尖部壳体的连接处至少部分重叠，重叠部分粘接，所述连接处的外表面缠绕设置缠绕带。
本实施例中，所述尖部的末梢呈圆滑设置，减小叶片21阻力，还可以防止工人在操作安装时尖部末梢划伤工人。
实施例五
如图9所示，所述叶片加长组件4的尖部设有平行于叶片加长组件轴线的小叶片21，以增大风机的扫风面积，提高发电量。
本实施例中，所述尖部的壳体上设有可供小叶片21插入的插槽，小叶片21的叶面与加长叶片组件4的轴线相平行。
本实施例中，所述叶片加长组件4的尖部设有多个沿着尖部轴线相交错布置的小叶片21。
以上所述仅是本发明的较佳实施例而已，并非对本发明作任何形式上的限制，虽然本发明已以较佳实施例揭露如上，然而并非用以限定本发明，任何熟悉本专利的技术人员在不脱离本发明技术方案范围内，当可利用上述提示的技术内容作出些许更动或修饰为等同变化的等效实施例，但凡是未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均仍属于本发明方案的范围内。

Claims (10)

  1. 一种风机叶片加长组件，包括一端设有开口的端部和一端封闭的尖部，叶片加长组件沿着叶片加长组件轴线从端部到尖部的长度方向延伸，其特征在于：叶片加长组件的尖部倾斜与叶片加长组件轴线延伸方向之间形成一定的夹角，所述尖部倾斜方向朝向叶片工作时的迎风面。
  2. 根据权利要求1所述的一种风机叶片加长组件，其特征在于：所述叶片加长组件的尖部垂直于轴线延伸方向弯折延伸，弯折方向朝向叶片工作时的迎风面。
  3. 根据权利要求1或2所述的一种风机叶片加长组件，其特征在于：所述叶片加长组件包括设置在外部的壳体，壳体包括叶片加长组件工作时迎风一侧的第一壳体和背风一侧的第二壳体，第一壳体和第二壳体相扣合连接，所述第一壳体的尖部和第二壳体的尖部垂直于轴线延伸方向向迎风一侧弯折延伸。
  4. 根据权利要求3所述的一种风机叶片加长组件，其特征在于：所述第一壳体的尖部由平行于轴线方向向垂直于轴线方向向内凹陷弯曲。
  5. 根据权利要求3所述的一种风机叶片加长组件，其特征在于：所述第二壳体的尖部由平行于轴线方向向垂直于轴线方向向外凸出弯曲。
  6. 根据权利要求1至5任一所述的一种风机叶片加长组件，其特征在于：所述第一壳体曲率中心和第二壳体的曲率中心位于迎风一侧，所述第二壳体的弯曲半径大于第一壳体的弯曲半径。
  7. 根据权利要求1至6任一所述的一种风机叶片加长组件，其特征在于：所述叶片加长组件包括设置在壳体内部的主梁，所述主梁由壳体端部向尖部延伸超过弯折部，以增加叶片加长组件尖部的强度。
  8. 根据权利要求7所述的一种风机叶片加长组件，其特征在于：所述主梁设置在第一壳体和第二壳体之间的空腔内，主梁沿着叶片加长组件壳体延伸至叶片加长组件的尖部；
    优选的，所述主梁的弯曲半径大于第一壳体的弯曲半径，所述主梁的弯曲半径小于第二壳体的弯曲半径。
  9. 根据权利要求1至8任一所述的一种风机叶片加长组件，其特征在于：所述叶片加长组件的尖部中空形成腔室，腔室内部设有接闪器支架，所述接闪器支架包括支撑杆和套设在支撑杆上的支撑座，支撑杆的一端连接防雷线，另一端连接接闪器。
  10. 根据权利要求9所述的一种风机叶片加长组件，其特征在于：所述支撑座可拆卸的 固定在腔室朝向叶尖的内壁上，所述内壁设有一凹槽，支撑杆连接接闪器伸入到凹槽内部，套设在支撑杆上的支撑座固定在内壁上，以稳固接闪器。
PCT/CN2018/121223 2018-12-14 2018-12-14 一种风机叶片加长组件 WO2020118692A1 (zh)

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CN102345567A (zh) * 2010-08-02 2012-02-08 西门子公司 用于雷电保护的装置
CN102529092A (zh) * 2012-02-17 2012-07-04 北京可汗之风科技有限公司 一种加长风电叶片长度的方法
CN105065196A (zh) * 2015-07-30 2015-11-18 中国大唐集团新能源股份有限公司 一种叶片加长型风机
CN204827790U (zh) * 2015-07-30 2015-12-02 中国大唐集团新能源股份有限公司 一种风机叶片
CN206513503U (zh) * 2016-12-06 2017-09-22 北京博比风电科技有限公司 一种风电机组叶片叶尖延长加固结构
DE102017107464A1 (de) * 2017-04-06 2018-10-11 Teg Tubercle Engineering Group Gmbh Nachrüstkörper für ein Rotorblatt einer Windkraftanlage, nachgerüstetes Rotorblatt und Verfahren zum Nachrüsten des Rotorblatts

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102345567A (zh) * 2010-08-02 2012-02-08 西门子公司 用于雷电保护的装置
CN102529092A (zh) * 2012-02-17 2012-07-04 北京可汗之风科技有限公司 一种加长风电叶片长度的方法
CN105065196A (zh) * 2015-07-30 2015-11-18 中国大唐集团新能源股份有限公司 一种叶片加长型风机
CN204827790U (zh) * 2015-07-30 2015-12-02 中国大唐集团新能源股份有限公司 一种风机叶片
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