WO2021057815A1 - Dispositif de réduction du bruit, lame et procédé de formation de lame - Google Patents

Dispositif de réduction du bruit, lame et procédé de formation de lame Download PDF

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Publication number
WO2021057815A1
WO2021057815A1 PCT/CN2020/117240 CN2020117240W WO2021057815A1 WO 2021057815 A1 WO2021057815 A1 WO 2021057815A1 CN 2020117240 W CN2020117240 W CN 2020117240W WO 2021057815 A1 WO2021057815 A1 WO 2021057815A1
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WO
WIPO (PCT)
Prior art keywords
noise reduction
blade
reduction device
saw
unit
Prior art date
Application number
PCT/CN2020/117240
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English (en)
Chinese (zh)
Inventor
李成良
任旺
丁惢
Original Assignee
中材科技风电叶片股份有限公司
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Priority to BR112022005491A priority Critical patent/BR112022005491A2/pt
Publication of WO2021057815A1 publication Critical patent/WO2021057815A1/fr

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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
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • 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
    • 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
    • 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

  • This application relates to the field of wind power technology, and in particular to a noise reduction device, a blade, and a blade forming method.
  • the main method is to install noise reducers on the blades to reduce the aerodynamic noise generated by the blades.
  • the wind speed and wind force received by the wind turbine during operation often change.
  • the current noise reducers are unreasonable due to unreasonable structure settings. , Can not well reduce the aerodynamic noise generated by the wind turbine.
  • the embodiments of the present application provide a noise reduction device, a blade, and a blade forming method, which aim to reduce aerodynamic noise generated during the operation of the blade and improve the stability of the operation of the blade.
  • an embodiment of the present application provides a noise reduction device for blades.
  • the noise reduction device includes: a body, including a mounting portion, through which the body can be connected to the blade; a saw-tooth unit connected to the body, and the edge of the saw-tooth unit has Sawtooth structure, the sawtooth unit and the body are set at a preset angle ⁇ , and the preset angle ⁇ satisfies: 1° ⁇ 5°.
  • the preset angle ⁇ is 3°.
  • the edge of the saw-tooth unit has a plurality of saw-tooth structures, and the plurality of saw-tooth structures are arranged in a contraction direction away from the main body.
  • the sawtooth structure is triangular.
  • the saw-tooth unit includes a base and two intersecting reference sides.
  • the extension lines of the two reference sides and the base together form a virtual triangle;
  • the saw-tooth unit includes a plurality of noise reduction parts connected to each other.
  • the noise reduction parts are all arranged in a virtual triangle, the noise reduction part is a polygonal structure, and the multiple noise reduction parts are arranged in a direction away from the main body.
  • the edges of the multiple noise reduction parts are connected to each other to form a plurality of zigzag structures.
  • two adjacent noise reduction parts are arranged obliquely to each other.
  • the number of the multiple noise reduction parts is greater than or equal to three.
  • the noise reduction portion includes a connecting portion and a sawtooth portion that are connected to each other, the sawtooth portion includes a sawtooth structure, the connecting portion and the sawtooth portion are arranged obliquely to each other, and the inclination angle between the connecting portion and the sawtooth portion is 1° ⁇ 3°.
  • the noise reduction device can be installed on the blade, and along the height direction of the saw-tooth unit, the blade has a first chord length corresponding to the saw-tooth unit.
  • the saw-tooth unit includes a bottom edge and a vertex facing away from the bottom edge. The distance from the apex is the height of the saw-tooth unit; wherein the height of the saw-tooth unit is 15%-20% times the corresponding first chord length.
  • the length of the bottom edge of the saw-tooth unit is the width of the saw-tooth unit, and the height of the saw-tooth unit is 3 times the width of the saw-tooth unit.
  • the body and the serration unit are integrally formed.
  • an embodiment of the present application provides a blade, including: a housing including a trailing edge; a noise reduction device, such as the aforementioned noise reduction device, the noise reduction device being arranged on the trailing edge of the housing.
  • an embodiment of the present application provides a blade molding method, including: a shell; and a noise reduction device is connected to the shell to form a blade, wherein the noise reduction device is the aforementioned noise reduction device.
  • the noise reduction device includes a body and a sawtooth unit, the body can be stably connected with the blade through the mounting part, the sawtooth unit is connected to the body, and the edge of the sawtooth unit has a sawtooth structure, The turbulence flowing through the surface of the blade forms a plurality of opposite vortex pairs and cancels each other out.
  • the sawtooth structure can change the turbulent flow on the blade surface, break up the vortex pairs on the blade surface, reduce the energy of the vortex pair, and reduce the pulsating pressure generated when the vortex pair interacts with the blade surface.
  • the noise generated by the blade during operation is reduced.
  • the body of the noise reduction device and the serration unit are arranged at a preset angle. Under the premise that the body and the trailing edge of the blade are stably connected, the serration unit can better destroy the vortex generated on the blade surface during the rotation of the blade, thereby Improve the noise reduction effect.
  • FIG. 1 is a schematic diagram of the structure of a wind power generator set according to an embodiment of the present application
  • Figure 2 is an overall schematic diagram of a blade of an embodiment of the present application
  • Figure 3 is an enlarged view of A in Figure 2;
  • Figure 4 is a cross-sectional view in the direction of B-B in Figure 2;
  • Fig. 5 is a schematic structural diagram of a noise reduction device according to an embodiment of the present application.
  • Fig. 6 is a side view of a noise reduction device according to an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a sawtooth unit according to an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a sawtooth unit according to another embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a sawtooth unit according to another embodiment of the present application.
  • Fig. 10 is a side view of a saw-tooth unit according to an embodiment of the present application.
  • Figure 11 is a cross-sectional view at C-C in Figure 9;
  • Figure 12 is a graph of the experimental results of installing different noise reduction devices on the test model, where the height of the sawtooth unit and the width of the sawtooth unit in the multiple noise reduction devices form the same ratio, and the angle between the body and the sawtooth unit is different;
  • Figure 13 is a graph showing the experimental results of installing different noise reduction devices on the test model, where the angle between the body and the sawtooth unit is the same, and the ratio of the height of the sawtooth unit to the width of the sawtooth unit in multiple noise reduction devices is different;
  • FIG. 14 is a graph showing the experimental results of installing the noise reduction device of one embodiment of the present application and the noise reduction device of another embodiment of the present application on the test model;
  • FIG. 15 is a schematic flowchart of a blade forming method according to an embodiment of the application.
  • 30-noise reduction device 31-body; 311-mounting part; 312-first surface; 32-sawtooth unit; 321-second surface; 322-sawtooth structure; 323-first noise reduction part; 3231-connecting part; 3232-Sawtooth part; H-height; W-width; 33-bottom side; 34-reference side; 324-second noise reduction part; 325-third noise reduction part;
  • any lower limit can be combined with any upper limit to form an unspecified range; and any lower limit can be combined with other lower limits to form an unspecified range, and any upper limit can be combined with any other upper limit to form an unspecified range.
  • every point or single value between the end points of the range is included in the range. Therefore, each point or single numerical value can be used as its own lower limit or upper limit, combined with any other point or single numerical value, or combined with other lower or upper limits to form an unspecified range.
  • FIG. 1 shows a schematic structural diagram of a wind power generator set in the prior art.
  • the wind turbine generator mainly includes a tower 4, a nacelle 3, a generator 2 and an impeller 1.
  • the nacelle 3 is arranged at the top of the tower 4, and the generator 2 is arranged in the nacelle 3, which can be located inside the nacelle 3, of course, it can also be located in the nacelle 3 outside.
  • the impeller 1 includes a hub 200 and two or more blades 100 respectively connected to the hub 200. The blades 100 drive the hub 200 to rotate under the action of wind load, thereby realizing the power generation of the generator 2.
  • FIG. 2 shows the overall schematic diagram of the blade of the embodiment of the present application.
  • 3 shows an enlarged view at A in FIG. 2
  • FIG. 4 shows a cross-sectional view in the BB direction in FIG. 2.
  • the blade 100 provided by the embodiment of the present application includes a shell 10, a web 20, and a noise reduction device 30.
  • the shell 10 has an axial direction X and a chord direction Y.
  • the shell 10 includes a windward surface shell 11 and a leeward surface shell 12 arranged oppositely.
  • the windward surface shell 11 and the leeward surface shell 12 are buckled to form a hollow space 17.
  • the shell 10 has a leading edge region 13 and a trailing edge region 14 in the chord direction Y, and a blade root 15 and a blade tip 16 in the axial direction X. .
  • the web 20 is disposed in the hollow space 17, and the web 20 is connected to the windward side shell 11 and the leeward side shell 12.
  • the web 20 can support the shell 10 of the blade 100 to enhance the strength of the blade 100.
  • the blade 100 is provided with a noise reduction device 30 on the side facing away from the hollow space 17 to reduce the noise generated during the operation of the blade 100.
  • the airflow when the airflow blows toward the blade 100, the airflow interacts with the blade 100 to form turbulence flowing along the surface of the blade 100.
  • the turbulence on the surface of the blade 100 will beat the blade 100, resulting in
  • the noise reduction device 30 on the surface of the blade 100, the aerodynamic noise generated during the operation of the blade 100 can be effectively reduced, and the stability of the operation of the blade 100 can be improved.
  • the blade 100 includes a trailing edge.
  • the trailing edge is located close to the tip 16 of the blade 100.
  • the airflow interacts with the blade 100 to form turbulence along the surface of the blade 100.
  • the turbulence is at the tail. Sound is scattered at the edge, forming noise, and the greater the intensity of the turbulence, the greater the noise.
  • the noise reduction device 30 is arranged on the trailing edge to effectively reduce the noise on the trailing edge surface and at the same time to improve the stability of the blade 100.
  • FIG. 5 shows a schematic structural diagram of a noise reduction device according to an embodiment of the present application
  • FIG. 6 shows a side view of the noise reduction device according to an embodiment of the present application
  • FIG. 7 illustrates the present application A schematic diagram of the structure of a saw-tooth unit of an embodiment
  • FIG. 8 shows a schematic diagram of the structure of a saw-tooth unit of another embodiment of the present application
  • FIG. 9 shows a schematic diagram of the structure of a saw-tooth unit of another embodiment of the present application
  • FIG. 10 shows the present application A side view of the saw-tooth unit of an embodiment.
  • FIG. 11 shows a cross-sectional view at CC in FIG. 9.
  • the embodiment of the present application provides a noise reduction device 30 used for the blade 100.
  • the noise reduction device 30 includes a body 31 and a saw-tooth unit 32.
  • the body 31 includes a mounting portion 311, and the body 31 can be connected to the blade 100 through the mounting portion 311.
  • the saw-tooth unit 32 is connected to the body 31.
  • the edge of the saw-tooth unit 32 has a saw-tooth structure 322.
  • the saw-tooth unit 32 and the body 31 are set at a preset angle ⁇ , and the preset angle ⁇ satisfies: 1° ⁇ 5°.
  • the noise reduction device 30 provided by the embodiment of the present application includes a main body 31 and a serrated unit 32.
  • the main body 31 can be stably connected to the blade 100 through the mounting portion 311.
  • the serrated unit 32 is connected to the main body 31.
  • the edge of the serrated unit 32 has a serrated structure 322. The turbulence flowing through the surface of the blade 100 forms a plurality of opposite vortex pairs and cancels each other out.
  • the serrated unit 32 can change the turbulent flow on the surface of the blade 100, disperse the vortex pairs on the surface of the blade 100, reduce the energy of the vortex pair, and reduce the effect of the vortex pair and the surface of the blade 100 The pulsating pressure generated at the time, thereby reducing the noise generated during the operation of the blade 100.
  • the main body 31 of the noise reduction device 30 and the serration unit 32 are arranged at a preset angle ⁇ .
  • the serration unit 32 can better damage the blade 100 generated during the rotation of the blade. 100 turbulence on the surface, thereby improving the noise reduction effect.
  • the body 31 in the direction of the thickness of the body 31 itself, includes a first surface 312 opposite to the mounting portion 311, the serrated unit 32 includes a second surface 321, and a predetermined distance between the serrated unit 32 and the body 31
  • the angle ⁇ be the angle between the first surface 312 and the second surface 321.
  • the preset angle ⁇ is 3°.
  • the saw-tooth unit 32 can better disperse the vortex on the surface of the blade 100, so as to effectively reduce the aerodynamic noise generated during the operation of the blade 100.
  • the shape of the mounting portion 311 matches the shape of the surface of the blade 100 to increase the connection area between the mounting portion 311 and the blade 100.
  • the saw-tooth unit 32 has a triangular shape as a whole, and the structure of the saw-tooth unit 32 and the preset angle between the saw-tooth unit 32 and the main body 31 are reasonably set to effectively reduce noise.
  • the noise reduction device 30 includes a plurality of saw-tooth units 32 to break up the turbulence on the surface of the blade 100.
  • at least part of the edge of the saw-tooth unit 32 has a plurality of saw-tooth structures 322, and the plurality of saw-tooth structures 322 are arranged in a shrinking direction away from the main body 31.
  • the overall outline of the saw-tooth unit 32 is approximately triangular or trapezoidal, so as to better disperse the turbulence on the surface of the blade 100 and form a smaller vortex.
  • each saw-tooth structure 322 can further disperse the smaller eddy currents, so that the energy of the eddy currents after the multiple saw-tooth structures 322 are dispersed is significantly reduced. It can better reduce the aerodynamic noise generated by the vortex hitting the surface of the blade 100.
  • the sawtooth structure 322 is triangular.
  • the triangular saw-tooth structure 322 has a stress concentration part, so that the saw-tooth structure 322 can quickly and effectively disperse the turbulence, so that the distance between the vortex pairs formed by the turbulence is relatively close, and the mutual cancellation effect is strong, which is beneficial to improve the noise reduction effect, and then Reduce the aerodynamic noise generated by the blade 100 during operation.
  • the sawtooth structure 322 may also be one or a combination of a trapezoidal structure, a broken line structure, and a circular arc structure.
  • the saw-tooth unit 32 includes a base 33 and two intersecting reference sides 34.
  • the extension of the two reference sides 34 and the base 33 together form a virtual triangle.
  • a plurality of noise reduction parts 323, a plurality of noise reduction parts 323 are arranged in a virtual triangle, the noise reduction part 323 is a polygonal structure, the plurality of noise reduction parts 323 are arranged in a direction away from the main body 31, and the multiple noise reduction parts 323
  • the edges are connected to each other to form a plurality of zigzag structures 322.
  • the plurality of noise reduction parts includes a first noise reduction part 323, which is arranged close to the main body 31, the side of the first noise reduction part 323 close to the main body 31 is the bottom edge 33 of the sawtooth unit 32, and the first noise reduction part 323 is The two sides intersecting the base 33 coincide with the reference side 34 of the zigzag unit 32. At this time, the extension lines of the two reference sides 34 and the base 33 together form a virtual triangle.
  • the triangular saw-tooth unit 32 can be made first, and then the edge of the triangular saw-tooth unit 32 is further processed, so that the edge of the saw-tooth unit 32 forms a plurality of saw-tooth structures 322. At this time, the plurality of saw-tooth structures 322 are all arranged in the saw-tooth unit 32.
  • the saw-tooth unit 32 is triangular, so that the saw-tooth unit 32 can initially disperse the larger energy turbulence, and then the saw-tooth structure 322 on the edge of the saw-tooth unit 32 will be initially dispersed. The vortex pair is further dispersed to effectively reduce the aerodynamic noise generated on the surface of the blade 100.
  • the number of the multiple noise reduction parts is greater than or equal to three.
  • the multiple noise reduction parts include a first noise reduction part 323, a second noise reduction part 324, and a third noise reduction part 325.
  • Multiple noise reduction parts can better attenuate the energy of turbulence on the surface of the blade 100.
  • the number of sawtooth structures 322 formed on the edges of the multiple noise reduction parts is increased. The more reverse vortex pairs are formed after the turbulence is broken up, and the energy of the turbulence will be reduced due to the increase in the number of vortex pairs, which is beneficial to improve the noise reduction effect.
  • first noise reduction part 323, the second noise reduction part 324, and the third noise reduction part 325 may be arranged inclined to each other.
  • the structures of the first noise reduction part 323, the second noise reduction part 324, and the third noise reduction part 325 are similar.
  • the embodiment of the present application takes the first noise reduction part 323 as an example for description.
  • the first noise reduction portion includes a connecting portion 3231 and a serrated portion 3232 that are connected to each other.
  • the serrated portion 3232 forms a serrated structure 322.
  • the connecting portion 3231 and the serrated portion 3232 are mutually connected.
  • the inclination angle between the connecting portion 3231 and the serrated portion 3232 is 1°-3°. Since the wind speed and the force of the wind received by the blade 100 during operation often change, the structure of the noise reduction part is properly arranged, so that the sawtooth structure 322 can break up the turbulence in multiple directions to improve the noise reduction effect.
  • the first noise reduction portion 323 includes two sawtooth portions 3232 and a connecting portion 3231 disposed between the two sawtooth portions 3232 and connecting the two sawtooth portions 3232, wherein the two sawtooth portions 3232 on the same noise reduction portion
  • the shape can be the same or different.
  • the shape of the sawtooth part 3232 between different noise reduction parts can also be set according to user requirements.
  • the sawtooth part 3232 of the first noise reduction part 323 may form a triangular sawtooth structure
  • the 324 sawtooth part 3232 of the second noise reduction part may form a rectangular sawtooth structure.
  • the noise reduction device 30 can be mounted to the blade 100.
  • the blade 100 has a first chord length corresponding to the saw-tooth unit 32.
  • the apex of the base 33 and the distance between the base 33 and the apex are the height H of the saw-tooth unit 32, wherein the height H of the saw-tooth unit 32 is 15%-20% times the corresponding first chord length.
  • the length of the bottom edge 33 of the saw-tooth unit 32 is the width W of the saw-tooth unit 32, and the height H of the saw-tooth unit 32 is 3 times the width W of the saw-tooth unit 32.
  • the height of the saw-tooth unit 32 will follow As the first chord length changes, further, since the height H of the saw-tooth unit 32 has a corresponding relationship with the width W, when the first chord length of the blade 100 changes, the width W of the saw-tooth unit 32 also changes.
  • the first chord length changes, so that the saw-tooth unit 31 reduces the noise generated by the blade 100 more effectively.
  • the body 31 of the noise reduction device 30 and the sawtooth unit 32 are integrally formed, and the noise reduction device 30 is made of resin mixed chopped glass fiber.
  • the noise characteristics of the blade 100 provided with the noise reduction device 30 are tested by using a microphone array method and a wind tunnel experiment.
  • the microphone array method for noise testing and wind tunnel experiments should be understood by those of ordinary skill in the art, and will not be repeated here, nor should it be used as a limitation to the application.
  • a test model is made according to the shape parameters of the tip portion 16 of the blade 100.
  • the test model can be made according to the actual size of the trailing edge of the blade 100.
  • the test model is set on the test device to perform an experiment. It can be understood that the test device can rotate the test model to simulate the rotation and yaw of the blade 100 during operation.
  • a microphone array around the test section 55° ⁇ 115° is selected to experiment on the noise reduction effect of the noise reduction device.
  • the microphone array is set at 50° and 60° of the test model respectively. °, 70°, 80°, 90° and 100° positions to collect the noise generated by the test model during operation.
  • Figure 12 shows the experimental results of the test model with different noise reduction devices. Among them, the height of the sawtooth unit and the width of the sawtooth unit in the multiple noise reduction devices form the same ratio. The angle between the serrated unit is different.
  • Figure 13 shows the experimental results of installing different noise reduction devices on the test model, where the angle between the body and the sawtooth unit is the same, and the ratio of the height of the sawtooth unit to the width of the sawtooth unit in multiple noise reduction devices is different.
  • FIG. 14 shows a graph of the experimental results of a test model installed with the noise reduction device of one embodiment of the present application and the noise reduction device of another embodiment of the present application.
  • the baseline in FIG. 12 is the noise test result of the test model during operation when the test model is not installed with the noise reduction device 30 of the embodiment of the present application.
  • L1, L2, and L3 are the noise results measured by the microphone array when different noise reduction devices 30 are installed for the test model respectively.
  • the noise result represented by L1 is about 1dBA lower than the baseline
  • the noise result represented by L2 is about 3dBA lower than the baseline
  • the noise result represented by L3 is about 3dBA lower than the baseline.
  • the noise results represented by L1, L2, and L3 are all smaller than the noise reduction effect represented by the baseline. Therefore, when the noise reduction device 30 of the embodiment of the present application is installed on the test model, the microphone array method measures The noise of the test model provided with the noise reduction device 30 is significantly reduced. Experiments have proved that the noise reduction device 30 of the embodiment of the present application can significantly reduce the noise generated during the operation of the test model. By installing the noise reduction device 30 of the embodiment of the present application on the test model, the noise of about 1dBA-3dBA can be reduced.
  • L4, L5, and L6 are the noise results measured by the microphone array when different noise reduction devices 30 are installed for the test model.
  • the noise result represented by L4 is about 3dBA lower than the baseline
  • the noise result represented by L5 is about 3.5dBA lower than the baseline
  • the noise result represented by L6 is about 3.5dBA lower than the baseline.
  • the noise results represented by L4, L5, and L6 are all smaller than the noise reduction effect represented by the reference line. Therefore, when the noise reduction device 30 of the embodiment of the present application is installed on the test model, the microphone array method measures The noise of the test model provided with the noise reduction device 30 is significantly reduced. Experiments have proved that the noise reduction device 30 of the embodiment of the application can significantly reduce the noise generated during the operation of the test model. By installing the noise reduction device 30 of the embodiment of the application on the test model, the noise of about 2dBA ⁇ 3.5dBA can be reduced. .
  • L9 is an experimental result diagram of the test model installed with the noise reduction device 30 of an embodiment of the present application.
  • the structure of the sawtooth unit 32 of the noise reduction device 30 may be as shown in FIG. 7.
  • the edge of the saw-tooth unit 32 has a saw-tooth structure 322.
  • L7 and L8 are respectively the experimental results of the test model installed with the noise reduction device 30 of another embodiment of the present application.
  • the structure of the sawtooth unit 32 of the noise reduction device 30 may be as shown in FIG. 8 or FIG. 9.
  • the edge of the saw-tooth unit 32 has a plurality of saw-tooth structures 322.
  • L7 is the experimental result diagram of the test model installed with the noise reduction device 30 shown in FIG. 9
  • L8 is the test model installed with the reduction device shown in FIG. 8. Figure of the experimental results of the noise device 30.
  • the noise result represented by L7 is about 2.5dBA lower than the baseline
  • the noise result represented by L8 is about 5dBA lower than the baseline
  • the noise result represented by L9 is about 3.5 lower than the baseline. dBA.
  • the noise reduction device 30 provided by the embodiments of the present application can significantly reduce the noise generated during the operation of the test model. Therefore, when the noise reduction device 30 provided by the embodiments of the present application is applied to the blade 100, it can effectively improve The noise reduction effect of the blade 100. It is understandable that the user can design the ratio between the height H and the width W of the saw-tooth unit 32 and the angle value between the main body 31 and the saw-tooth unit 32 according to actual needs.
  • the body 31 can be stably connected to the blade 100 through the mounting portion 311, the serrated unit 32 is connected to the body 31, and the edge of the serrated unit 32 has a serrated structure 322, so that the flow through the blade
  • the turbulence on the surface of 100 forms a plurality of opposite vortex pairs and cancels each other out.
  • the serrated structure 322 can change the turbulent flow on the surface of the blade 100, disperse the vortex pairs on the surface of the blade 100, reduce the energy of the vortex pair, and reduce the effect of the vortex pair and the surface of the blade 100 The pulsating pressure generated at the time, thereby reducing the noise generated during the operation of the blade 100.
  • the body 31 of the noise reduction device 30 and the serration unit 32 are arranged at a preset angle. Under the premise that the body 31 and the blade root 15 of the blade 100 are stably connected, the serration unit 32 can better damage the blade 100 during rotation. The vortex on the surface of the blade 100 improves the noise reduction effect.
  • FIG. 15 shows a flowchart of the blade forming method according to an embodiment of the present application.
  • S120 Connect a noise reduction device to the shell to form a blade.
  • the noise reduction device is the noise reduction device provided in any of the above-mentioned embodiments.
  • the blade forming method provided by the embodiment of the present application includes connecting a noise reduction device 30 to the housing 10 to form the blade 100.
  • the noise reduction device 30 adopts the noise reduction device 30 provided in any of the above embodiments to make the formed blade During operation of 100, the noise reduction device 30 can form turbulence flowing through the surface of the blade 100 into multiple directional vortex pairs and cancel each other, so as to effectively control the noise in the propagation path, and improve the noise reduction of the noise reduction device 30 effect.
  • a step of forming a shell may be included.
  • the step of forming a shell may include:
  • Step 1 Provide the windward side shell and the leeward side shell.
  • Step 2 bonding the web to one of the windward side shell or the leeward side shell.
  • Step 3 Clamp the windward side shell and the leeward side shell to form a shell.
  • an adhesive such as epoxy resin may be applied to the web 20 with a glue tool to bond the web 20 On the bonding area of the web 20 of the windward side shell 11. It is understandable that the web 20 can also be bonded to the leeward shell 12 first, which is not limited in this application.
  • a gluing tool may be used to coat the surface of the housing 10 such as epoxy resin, and the body 31 of the noise reduction device 30 is bonded to the surface of the housing 10.
  • the blade 100 includes a blade root 15 and a blade tip 16.
  • the noise reduction device 30 can be bonded to the blade tip 16 of the blade 100, or the noise reduction device 30 can be installed along the entire axial direction of the blade 100.
  • the noise reduction device 30 may be installed on the windward side shell 11 or on the leeward side shell 12 at the same time, so as to reduce the aerodynamic noise of the blade 100 in all directions.
  • the noise reduction device 30 can form turbulence flowing through the surface of the blade 100 into multiple directional vortex pairs and cancel each other, thereby minimizing the reduction.
  • the aerodynamic noise generated by the blade 100 during the operation improves the quality of the blade 100 and the stability of the operation of the blade 100, so it is easy to popularize and use.

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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)
  • Wind Motors (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne un dispositif de réduction du bruit (30), une lame (100) et un procédé de formation de lame (100). Le dispositif de réduction du bruit (30) est utilisé pour la lame (100). Le dispositif de réduction du bruit (30) comprend un corps (31). Le corps (31) comprend une partie d'installation (311), et le corps (31) peut être relié à la lame (100) par l'intermédiaire de la partie d'installation (311). Une unité en dents de scie (32) est reliée au corps (31), un bord de l'unité en dents de scie (32) est pourvu d'une structure en dents de scie (322), un angle prédéfini α est formé entre l'unité en dents de scie (32) et le corps (31), et l'angle prédéfini α satisfait à la condition suivante : 1° ≤ α ≤ 5°. Dans le dispositif de réduction du bruit (30), la lame (100) et le procédé de formation de lame (100), le bruit aérodynamique généré pendant le fonctionnement de la lame (100) peut être réduit, et la stabilité de fonctionnement de la lame (100) est également améliorée.
PCT/CN2020/117240 2019-09-24 2020-09-23 Dispositif de réduction du bruit, lame et procédé de formation de lame WO2021057815A1 (fr)

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BR112022005491A BR112022005491A2 (pt) 2019-09-24 2020-09-23 Dispositivo de redução de ruído para uma lâmina, lâmina e método de formação de lâmina

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CN114543882A (zh) * 2022-02-23 2022-05-27 湖南联诚轨道装备有限公司 低噪冷却系统锯齿离心叶轮试验设计测试装置及方法
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WO2024170631A1 (fr) * 2023-02-14 2024-08-22 Zelin Dispositif de reduction du bruit aeroacoustique d'une pale d'un equipement aeraulique et pale d'eolienne equipee d'un tel dispositif de reduction de bruit

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CN113294286B (zh) * 2021-03-31 2023-02-03 江苏金风科技有限公司 叶片降噪装置、叶片及风力发电机组

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* Cited by examiner, † Cited by third party
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CN114013647A (zh) * 2021-11-19 2022-02-08 大连海事大学 一种三维尾缘锯齿仿生机翼变形方法
CN114543882A (zh) * 2022-02-23 2022-05-27 湖南联诚轨道装备有限公司 低噪冷却系统锯齿离心叶轮试验设计测试装置及方法
FR3145783A1 (fr) * 2023-02-14 2024-08-16 Zelin Dispositif de reduction du bruit aeroacoustique d’une pale d’un equipement aeraulique et pale d’eolienne equipee d’un tel dispositif de reduction de bruit
WO2024170631A1 (fr) * 2023-02-14 2024-08-22 Zelin Dispositif de reduction du bruit aeroacoustique d'une pale d'un equipement aeraulique et pale d'eolienne equipee d'un tel dispositif de reduction de bruit

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