A noise reduction device for wind turbine

Abstract

The present invention relates to the field of noise reduction devices for generators, and in particular to a noise reduction device for wind turbines, including an upper shell and a lower shell, etc. The noise reduction device for wind turbines described in the present invention switches the arc-shaped sealing plate to an open state that is recessed inward in a sunlight environment, and uses the arc-shaped sealing plate in combination with sound-absorbing cotton to perform multi-directional noise reduction processing. In a night environment or rainy environment, the arc-shaped sealing plate is switched to a closed state that fits the heat dissipation port outward, and uses the arc-shaped sealing plate in combination with sound-absorbing cotton to perform all-round noise reduction processing. On the basis of enhancing the noise absorption effect, the sound-absorbing cotton is provided with an appropriate amount of moisture-proof protection. The technical problems that the sound-absorbing cotton used in the installation shell of the generator module cannot achieve all-round noise absorption, and the sound-absorbing cotton will reduce the heat dissipation efficiency of the installation shell, and is prone to moisture and mold are solved.

Description

Technical Field

[0001] The invention relates to the field of noise reduction devices for generators, and in particular to a noise reduction device for wind turbines. Background Art

[0002] The noise reduction technology of wind turbines is divided into active noise reduction and passive noise reduction. Active noise reduction refers to optimizing the shape structure of the wind turbine's generating blades to reduce the noise generated during the rotation of the generating blades. Passive noise reduction refers to installing a noise reduction device on the generator module installation area of ​​the wind turbine to absorb the noise generated by the generator module during power generation. Existing noise reduction devices are usually installed inside the installation shell of the generator module. For example, a layer of sound-absorbing cotton is fixed inside the installation shell. The noise generated by the generator module during operation is actively absorbed by the sound-absorbing cotton, which effectively reduces the diffusion of noise during the operation of the generator module. However, since a large area of ​​heat dissipation hole structure is opened on the installation shell, part of the noise generated by the generator module during operation will still diffuse outward through these heat dissipation hole structures. Moreover, the sound-absorbing cotton will not only reduce the overall heat dissipation efficiency of the installation shell, but in rainy weather, external rainwater can easily enter the installation shell through the heat dissipation hole structure, resulting in a large area of ​​moisture and mold on the sound-absorbing cotton in the installation shell, affecting the service life and noise reduction effect of the sound-absorbing cotton. Summary of the invention

[0003] In order to overcome the shortcomings that the sound-absorbing cotton used in the installation shell of the generator module cannot absorb noise in all directions, and the sound-absorbing cotton will reduce the heat dissipation efficiency of the installation shell and is prone to moisture and mold, the present invention provides a noise reduction device for a wind turbine.

[0004] Technical implementation scheme of the present invention: A noise reduction device for a wind turbine, comprising an upper shell, a lower shell, an arc-shaped sealing plate, a driven shaft and a rotation control assembly; the lower shell is fixedly connected to the upper shell; a plurality of heat dissipation port structures are provided on the upper shell; the heat dissipation port is rotatably connected to an arc-shaped sealing plate through the driven shaft; the arc-shaped sealing plate is composed of an inner layer of sound-absorbing material and an outer layer of hard material; the first arc-shaped sealing plate located on the left side of the upper shell is provided with a ventilation groove structure; the first arc-shaped sealing plate located on the right side of the upper shell is also provided with a ventilation groove structure; a rotation control assembly for synchronously controlling the rotation of each driven shaft and the arc-shaped sealing plate is commonly connected between the upper shell and the lower shell.

[0005] Further description is given, a layer of sound-absorbing cotton is fixedly connected between the inner walls of the upper shell and the lower shell.

[0006] Further explanation: a plurality of raised structures are provided inside the sound-absorbing cotton.

[0007] It is further explained that a plurality of sound-absorbing hole structures are provided in the outer surface area of ​​the arc-shaped sealing plate.

[0008] It is further explained that the inner surface area of ​​the arc-shaped sealing plate is coated with a reflective coating.

[0009] Further description, the rotation control assembly includes an electric swivel, a ring gear, a transmission shaft, a spur gear and a coupling; the electric swivel is connected to the upper shell and the lower shell for common rotation; the ring gear is fixed to the electric swivel; a transmission shaft corresponding to the number of arc-shaped sealing plates is rotatably connected in the upper shell; spur gears are fixed to the transmission shaft; all spur gears mesh with the ring gear together; the transmission shaft and the corresponding driven shaft are connected through a coupling.

[0010] It is further explained that a sealing ring is fixedly connected in the heat dissipation port; the sealing ring is tightly attached to the adjacent arc-shaped sealing plate.

[0011] To further explain, a drainage outlet structure is provided at the rear side of each heat dissipation outlet.

[0012] To further explain, a plurality of inner fan blades are fixedly connected to the electric swivel.

[0013] To further explain, a temperature sensor is installed in the lower shell.

[0014] Beneficial effects of the present invention: The present invention describes a noise reduction device for a wind turbine, which is composed of an upper shell and a lower shell together forming an outer shell of a generator module. A rotatable arc-shaped sealing plate is provided on the heat dissipation port of the upper shell. In a sunlight environment, the arc-shaped sealing plate is switched to an open state concave inwards, and the arc-shaped sealing plate is used in conjunction with sound-absorbing cotton to perform multi-directional noise reduction treatment, which is beneficial to improving the heat dissipation effect of the outer shell on the basis of reducing noise diffusion. In a night environment or rainy environment, the arc-shaped sealing plate is switched to a closed state that fits the heat dissipation port outwards, and the arc-shaped sealing plate is used in conjunction with sound-absorbing cotton to perform all-round noise reduction treatment, which is beneficial to significantly reduce the condensation generated by external rainwater and low temperature environment from entering the outer shell on the basis of enhancing the noise absorption effect, and provide an appropriate amount of moisture-proof protection for the sound-absorbing cotton;

[0015] The noise reduction device for a wind turbine described in the present invention solves the technical problems that the sound-absorbing cotton used in the installation shell of the generator module cannot absorb noise in all directions, and the sound-absorbing cotton will reduce the heat dissipation efficiency of the installation shell and is prone to moisture and mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of a first viewing angle of the present invention;

[0017] Figure 2 This is a second viewing angle schematic diagram of the present invention;

[0018] Figure 3 is a cross-sectional view of the upper shell of the present invention;

[0019] Figure 4 It is a partial schematic diagram of the arc-shaped sealing plate of the present invention;

[0020] Figure 5 It is a partial schematic diagram of the ring gear of the present invention;

[0021] Figure 6 This is a diagram showing the flipping state of the arc-shaped sealing plate of the present invention.

[0022] Figure markings: 11-upper shell, 1101-heat dissipation port, 1102-drain port, 111-sealing ring, 12-lower shell, 13-sound-absorbing cotton, 131-raised portion, 2-arc-shaped sealing plate, 201-sound-absorbing hole, 202-ventilation groove, 21-driven shaft, 31-electric swivel, 32-ring gear, 33-transmission shaft, 34-spur gear, 35-coupling, 4-inner fan blades, 5-temperature sensor. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0024] Example 1

[0025] A noise reduction device for a wind turbine generator, such as Figure 1-Figure 5 As shown, it includes an upper shell 11, a lower shell 12, an arc-shaped sealing plate 2, a driven shaft 21 and a rotation control component; the lower shell 12 is fixedly connected to the upper shell 11, and the upper shell 11 and the lower shell 12 together constitute a complete outer shell; a plurality of heat dissipation ports 1101 structures are provided on the upper shell 11; each heat dissipation port 1101 is rotatably connected to a arc-shaped sealing plate 2 through the driven shaft 21; the arc-shaped sealing plate 2 is composed of an inner layer of sound-absorbing material and an outer layer of hard material; the arc-shaped sealing plate 2 located on the left vertical surface structure of the upper shell 11 is provided with a plurality of ventilation grooves 202 structures; the arc-shaped sealing plate 2 located on the right vertical surface structure of the upper shell 11 is also provided with a plurality of ventilation grooves 202 structures; a rotation control component is commonly connected between the upper shell 11 and the lower shell 12; the rotation control component is respectively connected to each driven shaft 21.

[0026] like Figure 1 As shown, a layer of sound-absorbing cotton 13 is fixedly connected between the inner walls of the upper shell 11 and the lower shell 12 ; a plurality of protrusions 131 are arranged inside the sound-absorbing cotton 13 .

[0027] like Figure 4 As shown, the outer surface area of ​​the arc-shaped sealing plate 2 initially facing the outer side of the upper shell 11 is provided with a plurality of sound-absorbing holes 201 structures; the inner surface area of ​​the arc-shaped sealing plate 2 initially facing the inner side of the upper shell 11 is coated with a reflective coating.

[0028] like Figure 1 and Figure 5 As shown, the rotation control component includes an electric swivel 31, a ring gear 32, a transmission shaft 33, a spur gear 34 and a coupling 35; the electric swivel 31 is rotatably connected between the upper shell 11 and the lower shell 12; the ring gear 32 is fixedly connected to the electric swivel 31; the upper shell 11 is rotatably connected with transmission shafts 33 corresponding to the number of arc-shaped sealing plates 2; each transmission shaft 33 is fixedly connected to a spur gear 34; all spur gears 34 mesh with the ring gear 32; each transmission shaft 33 is connected to the driven shaft 21 of the corresponding arc-shaped sealing plate 2 via a coupling 35.

[0029] The noise reduction device for a wind turbine of the present invention comprises an upper shell 11 and a lower shell 12 which together form a generator module protective outer shell of an external wind turbine. The following is the working principle under various environments.

[0030] In the sunlight environment, the electric swivel 31 drives the ring gear 32 to rotate, the ring gear 32 engages with the spur gear 34 to drive the transmission shaft 33 to rotate, and the transmission shaft 33 drives the driven shaft 21 and the arc-shaped sealing plate 2 to rotate 180 degrees through the coupling 35, so that the arc-shaped sealing plate 2 switches to the open state that is recessed toward the inside of the upward shell 11, such as Figure 6 As shown, a heat dissipation gap appears between the arc-shaped sealing plate 2 and the heat dissipation port 1101, which can ensure that the upper shell 11 has sufficient heat dissipation effect under long-term sunlight exposure, and the reflective layer coating on the inner surface of the arc-shaped sealing plate 2 is flipped to face outward. At this time, most of the sunlight irradiated on the arc-shaped sealing plate 2 can be reflected outward by the reflective layer coating, reducing the external sunlight heat radiation received by the upper shell 11, thereby reducing the heating phenomenon of the upper shell 11, and ensuring that the outer shell composed of the upper shell 11 and the lower shell 12 can meet normal heat dissipation requirements.

[0031] In this state, the sound-absorbing holes 201 on the outer surface of the arc-shaped sealing plate 2 are flipped to face inward. The arc-shaped sealing plate 2 can cooperate with the sound-absorbing cotton 13 through the sound-absorbing holes 201 to perform multi-directional noise reduction treatment on the noise generated during the operation of the generator module. In addition, the arc-shaped sealing plate 2 is in a recessed structure toward the interior of the upper shell 11, which can increase the noise absorption and interception range of the sound-absorbing holes 201 of the arc-shaped sealing plate 2, thereby reducing the diffusion of noise and improving the noise reduction effect on the generator module.

[0032] In a night environment or rainy environment, the upper shell 11 is no longer radiated by external sunlight heat, and the heating phenomenon of the upper shell 11 is greatly reduced. The electric swivel ring 31 drives the ring gear 32 to rotate, controlling the arc-shaped sealing plate 2 to rotate one hundred and eighty degrees again to complete the reset, so that the arc-shaped sealing plate 2 switches to a closed state fitted in the heat dissipation port 1101. At this time, only the ventilation grooves 202 on the arc-shaped sealing plates 2 on the left and right sides of the upper shell 11 are retained to dissipate heat to the external shell, so that the outer shell retains sufficient heat dissipation effect. At this time, the outer hard material of the arc-shaped sealing plate 2 can cooperate with the upper shell 11 to intercept condensation generated in rain and low temperature environment, avoid a large amount of rain and condensation from entering the outer shell, and provide appropriate moisture-proof protection for the sound-absorbing cotton 13.

[0033] In this state, the arc-shaped sealing plate 2 is composed of an inner layer of sound-absorbing material and sound-absorbing cotton 13, which performs all-round noise reduction processing on the noise generated by the operation of the generator module, greatly enhancing the noise absorption effect, and allowing the wind turbine to provide a quieter environment as much as possible at night.

[0034] Example 2

[0035] On the basis of Example 1, Figure 1-Figure 5 As shown, a sealing ring 111 is fixedly connected to the bottom of each heat dissipation port 1101 of the upper shell 11 of this embodiment; each sealing ring 111 is tightly attached to the adjacent arc-shaped sealing plate 2 to form a complete closed structure; a drainage port 1102 structure is provided on the rear side of each heat dissipation port 1101 of the upper shell 11.

[0036] In the rainy environment, the rainwater falling on the heat dissipation port 1101 of the present embodiment will be intercepted by the closed structure composed of the sealing ring 111 and the arc-shaped sealing plate 2, so that the rainwater can only flow along the arc structure on the surface of the arc-shaped sealing plate 2 to the drainage port 1102 on the rear side, and then the rainwater flows out through the drainage port 1102, thereby preventing a large amount of rainwater from accumulating in the heat dissipation port 1101 for a long time, causing the sealing ring 111 to be corroded by rainwater and causing the closed structure to be destroyed, thereby improving the sealing effect of the heat dissipation port 1101. The effect is to prevent external rainwater from entering the upper shell 11 and the lower shell 12. In addition, since only the arc-shaped sealing plate 2 on the left vertical surface structure of the upper shell 11 and the arc-shaped sealing plate 2 on the right vertical surface structure are provided with the ventilation groove 202 structure, and the ventilation groove 202 is set as a horizontal slit structure, the rainwater falling on the surface of the arc-shaped sealing plate 2 will slide down along the outer surface of the arc-shaped sealing plate 2 in a vertical state, and the phenomenon of external rainwater entering the upper shell 11 through the ventilation groove 202 will not occur.

[0037] Example 3

[0038] On the basis of Example 1, Figure 1-Figure 5As shown, a plurality of inner fan blades 4 are fixedly connected to the electric rotating ring 31 of this embodiment, and the inner fan blades 4 are located inside the upper shell 11 on the side facing the heat dissipation port 1101; a temperature sensor 5 is installed in the lower shell 12, and the temperature sensor 5 monitors the internal temperature of the lower shell 12.

[0039] In this embodiment, when the temperature sensor 5 detects that the lower shell 12 has a sudden temperature rise, the temperature sensor 5 sends a continuous operation command to the electric rotating ring 31, so that the electric rotating ring 31 drives the ring gear 32 and the inner fan blades 4 to rotate continuously. The rotating inner fan blades 4 continuously push the high-temperature air inside the upper shell 11 and the lower shell 12 to scrape toward the heat dissipation port 1101. At the same time, the ring gear 32 meshes with the spur gear 34 to drive the transmission shaft 33 and the driven shaft 21 to rotate, so that the driven shaft 21 drives the arc-shaped sealing plate 2 to rotate in the corresponding heat dissipation port 1101 area of ​​the upper shell 11. The arc-shaped sealing plate 2 continues to rotate. At this time, the high-temperature air scraped to the heat dissipation port 1101 will be fanned out from the inside of the upper shell 11 to the outside in the state of fan blades. At the same time, the arc-shaped sealing plate 2 will push the fresh air from the outside into the upper shell 11 through the heat dissipation port 1101 in the state of fan blades, thereby realizing continuous large-scale air-cooling heat dissipation treatment of the interior of the upper shell 11 and the lower shell 12, improving the heat dissipation efficiency of the interior of the upper shell 11 and the lower shell 12, accelerating the cooling treatment of the high-temperature air in the upper shell 11 and the lower shell 12, and ensuring that the generator modules inside the upper shell 11 and the lower shell 12 can operate normally.

[0040] Although the present disclosure has been described with respect to only a limited number of embodiments, those skilled in the art having benefit of this disclosure will appreciate that various other embodiments can be devised without departing from the scope of the present invention. Accordingly, the scope of the present invention should be limited only by the claims appended hereto.

Claims

1. A noise reduction device for a wind turbine, comprising: an upper shell (11); a lower shell (12) fixedly connected to the upper shell (11); and a plurality of heat dissipation openings (1101) structures formed on the upper shell (11); Its characteristics are: It also includes an arc-shaped sealing plate (2), a driven rotating shaft (21) and a rotation control component; The heat dissipation port (1101) is rotatably connected to an arc-shaped sealing plate (2) via a driven rotating shaft (21); the arc-shaped sealing plate (2) is composed of an inner layer of sound-absorbing material and an outer layer of hard material; the first arc-shaped sealing plate (2) located on the left side of the upper shell (11) is provided with a ventilation groove (202) structure; the first arc-shaped sealing plate (2) located on the right side of the upper shell (11) is also provided with a ventilation groove (202) structure; a rotation control component for synchronously controlling the rotation of each driven rotating shaft (21) and the arc-shaped sealing plate (2) is commonly connected between the upper shell (11) and the lower shell (12); The rotation control assembly includes an electric rotating ring (31), a ring gear (32), a transmission rotating shaft (33), a spur gear (34) and a coupling (35); An electric rotating ring (31) is rotatably connected between the upper housing (11) and the lower housing (12); a ring gear (32) is fixedly connected to the electric rotating ring (31); a number of transmission shafts (33) corresponding to the number of arc-shaped sealing plates (2) are rotatably connected in the upper housing (11); spur gears (34) are fixedly connected to the transmission shafts (33); all spur gears (34) mesh with the ring gear (32); and the transmission shafts (33) are connected to the corresponding driven shafts (21) via a coupling (35).

2. A noise reduction device for a wind turbine generator according to claim 1, characterized in that: A layer of sound-absorbing cotton (13) is fixedly connected between the inner walls of the upper shell (11) and the lower shell (12).

3. A noise reduction device for a wind turbine generator according to claim 2, characterized in that: A plurality of raised portion (131) structures are arranged inside the sound-absorbing cotton (13).

4. A noise reduction device for a wind turbine generator according to claim 1, characterized in that: A plurality of sound-absorbing holes (201) are provided in the outer surface area of ​​the arc-shaped sealing plate (2).

5. A noise reduction device for a wind turbine generator according to claim 1, characterized in that: The inner surface area of ​​the arc-shaped sealing plate (2) is coated with a reflective coating.

6. A noise reduction device for a wind turbine generator according to claim 1, characterized in that: A sealing ring (111) is fixedly connected inside the heat dissipation opening (1101); the sealing ring (111) is in close contact with the adjacent arc-shaped sealing plate (2).

7. A noise reduction device for a wind turbine generator according to claim 1, characterized in that: A drainage port (1102) structure is provided at the rear side of each heat dissipation port (1101).

8. A noise reduction device for a wind turbine generator according to claim 7, characterized in that: A plurality of inner fan blades (4) are fixedly connected to the electric rotating ring (31).

9. A noise reduction device for a wind turbine generator according to claim 8, characterized in that: A temperature sensor (5) is installed in the lower housing (12).

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