CN211258897U

CN211258897U - Hollow-out sawtooth noise reduction device and wind driven generator

Info

Publication number: CN211258897U
Application number: CN201921437895.XU
Authority: CN
Inventors: 丁勇钢
Original assignee: Sheyang Yuanjing Energy Technology Co ltd
Current assignee: Sheyang Yuanjing Energy Technology Co ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-08-14
Anticipated expiration: 2029-08-30

Abstract

The utility model relates to a device of making an uproar falls in fretwork type sawtooth, include: a body configured to be mountable at a mounting location and to carry a serration; a plurality of serrations on the body for noise reduction, wherein each serration comprises a plurality of voids allowing air to pass through, wherein the voids are disposed on the serration such that the serration has a substantially continuous edge. Through the utility model discloses, can show and improve noise reduction effect.

Description

Hollow-out sawtooth noise reduction device and wind driven generator

Technical Field

The utility model relates to an aerodynamic field generally, particularly, relate to a device of making an uproar falls in fretwork type sawtooth.

Background

In recent years, the field of clean energy shows a rapid development trend. Wind power generators are increasingly used as representatives of clean energy.

The blades of a wind turbine may be as long as more than 30 meters, even 70-80 meters as an important component of the wind turbine, such long blades may cause deviations of the actual blade from the design structure during manufacturing or assembly due to manufacturing or mounting tolerances, e.g. warping or damage of the blade, resulting in increased blade noise.

In order to reduce blade noise, noise reducers are typically used. The existing noise reducer generally uses a saw tooth structure, wherein the saw teeth of the noise reducer are generally flat plate type saw teeth, and the noise reduction effect is general. In addition, the flat plate type saw teeth can only break large shedding vortexes into medium shedding vortexes, and the noise reduction effect is limited.

SUMMERY OF THE UTILITY MODEL

The task of the utility model is to provide a device of making an uproar falls in fretwork type sawtooth, through this device of making an uproar falls, can show the improvement noise reduction effect.

According to the utility model discloses, this task is solved through a fretwork type sawtooth noise reduction device, and the device includes:

a body configured to be mountable at a mounting location and to carry a serration;

a plurality of serrations on the body for noise reduction, wherein each serration comprises a plurality of voids allowing air to pass through, wherein the voids are disposed on the serration such that the serration has a substantially continuous edge.

In the present invention, the term "substantially continuous" means that the ratio of the length of the continuous (closed) edge to the total edge length is above 70%, preferably above 90%, most preferably 100%. The term "air-passing voids" means that the voids extend through the serrations.

In a further embodiment of the invention, it is provided that the mounting point comprises one of the following: blades of wind power generators, wings of aircraft, and propellers of ships.

In a preferred embodiment of the invention, it is provided that the serrations have a reduced edge thickness. Here, "reduced edge thickness" means that the edge portion of the serration has a smaller thickness than the non-edge portion. The inventors have found through research that a reduced edge thickness is better able to suppress noise.

In a further preferred embodiment of the invention, it is provided that the edges of the serrations are smooth. The inventors have found through research that the smooth edges of the serrations contribute to noise suppression. Here, "smooth" refers to a region where no significant protrusion, such as a significant height change, is present.

In a further preferred embodiment of the invention, it is provided that the ratio of the height to the width of the serration is greater than 1. The utility model discloses a research discovery, the aspect ratio of the triangular space of sawtooth part is big more, and then the noise reduction effect is obvious more. The aspect ratio is preferably greater than 3, more preferably greater than 4.

In a further preferred embodiment of the invention, it is provided that the recess extends in the longitudinal direction of the serration and has a substantially constant length. The inventor of the present invention has found through research that the noise reduction effect is better when the gap extends along the length direction of the saw tooth part and has a substantially constant width. But other shapes of voids are also conceivable, such as trapezoidal, oval, irregular, etc.

In a further embodiment of the invention, it is provided that the body is an elongated sheet and the plurality of serrations are arranged side by side in the longitudinal direction of the body.

In a preferred embodiment of the invention, it is provided that the edge of the serration is in smooth transition with the body.

Furthermore, the utility model also provides a wind power generator, it includes according to the utility model discloses a device.

The utility model discloses have following beneficial effect at least: (1) the utility model discloses a hollow out part (vertical, level or other types of hollow out part) in the sawtooth region of device of making an uproar falls helps smashing into littleer, the higher little whirlpool of frequency with big whirlpool to further promote the noise reduction effect, this is based on inventor's following insight: the utility model discloses a noise reduction device can provide stable in structure's space that allows the air to pass through, can resolve into littleer, the higher little whirlpool of frequency steadily from this, reduces the noise; (2) the utility model discloses a device of making an uproar falls compares with other devices of making an uproar and has simpler structure, and can make through grinding apparatus and simple process.

Drawings

The invention will be further elucidated with reference to the drawings in conjunction with the detailed description.

Fig. 1 shows a schematic view of a hollowed-out type sawtooth noise reduction device according to the present invention;

fig. 2 shows a schematic view of a single serration of a hollowed-out serration noise reducer according to the invention; and

fig. 3 shows an installation schematic diagram of the hollow-out sawtooth noise reduction device according to the present invention.

Detailed Description

It should be noted that the components in the figures may be exaggerated and not necessarily to scale for illustrative purposes. In the figures, identical or functionally identical components are provided with the same reference symbols.

In the present invention, "disposed on …", "disposed above …" and "disposed over …" do not exclude the presence of an intermediate therebetween, unless otherwise specified. Further, "disposed on or above …" merely indicates the relative positional relationship between two components, and may also be converted to "disposed below or below …" and vice versa in certain cases, such as after reversing the product direction.

In the present invention, the embodiments are only intended to illustrate the aspects of the present invention, and should not be construed as limiting.

In the present application, the terms "a" and "an" do not exclude the presence of a plurality of elements, unless otherwise indicated.

It is further noted herein that in embodiments of the present invention, only a portion of the components or assemblies may be shown for clarity and simplicity, but those skilled in the art will appreciate that the components or assemblies may be added as needed for specific scenarios, given the teachings of the present invention.

It is also to be noted that, within the scope of the present invention, the expressions "identical", "equal", etc., do not mean that the two values are absolutely equal, but allow a certain reasonable error, that is, the expressions also cover "substantially identical", "substantially equal". By analogy, in the present disclosure, the terms "perpendicular to", "parallel to", and the like in the table direction also cover the meaning of "substantially perpendicular to", "substantially parallel to".

In addition, the numbering of the steps of the methods of the present invention does not limit the order of execution of the steps of the methods. Unless specifically stated, the method steps may be performed in a different order.

Fig. 1 shows a schematic view of a hollowed-out type sawtooth noise reduction device 100 according to the present invention.

As shown in fig. 1, the hollow-out type sawtooth noise reduction device 100 according to the present invention includes the following components:

a body 101 configured to be mountable at a mounting site, such as a blade of a wind generator, a wing of an aircraft, and a propeller of a ship. The body 101 can be arranged at the respective mounting site by means of an adhesive, for example. Furthermore, the body 101 is also configured to carry serrations. For example, the body 101 is provided with mounting locations for mounting a plurality of serrations 102. The body 101 may be made of, for example, plastic, metal, wood, fiber reinforced composite, or the like. The body 101 is, for example, a rectangular mounting plate.

A plurality of serrations 102 arranged on the body 102 for noise reduction. In the present example, for example 10 serrations 102 are bonded to the body by a dedicated glue, such as a structural glue. Each serration 102 comprises a plurality of air-permeable voids 103, wherein said voids 103 are arranged on the serration 102 such that the serration has a substantially continuous edge 104. In the present invention, the term "substantially continuous" means that the ratio of the length of the continuous edge to the total edge length is above 70%, preferably above 90%, most preferably 100%. The term "air-passing voids" means that the voids extend through the serrations. Further details regarding the serrations 102 can be found in fig. 2.

Fig. 2 shows a schematic view of a single serration 102 of a hollowed-out serration noise reducer according to the invention. As shown in fig. 2, the serration 102 has a plurality of voids 103 extending in a direction perpendicular to the longitudinal direction of the body 101. The recess 103 extends, for example, in the longitudinal direction of the serration 102 and has a substantially constant length. That is, the gap 103 is elongated extending perpendicular to the longitudinal direction of the body 101. The edges of the serrations 102 preferably have a reduced thickness. Here, "reduced edge thickness" means that the edge portion of the serration has a smaller thickness than the non-edge portion. The edges 104 of the serrations 102 are preferably smooth. Here, "smooth" refers to a region where no significant protrusion, such as a significant height change, is present. The ratio of the height to the width of the serrations is greater than 1, preferably greater than 3, more preferably greater than 4.

As shown in fig. 3, the cut-out type serration noise reducer 100 is disposed at the edge of the blade 200 of the wind turbine. For example, the noise reducer 100 may be bonded at the edge of the blade 200 by a special glue. Here, only a portion of the blade 200 and the noise reducer 100 are shown, wherein the noise reducer 100 may be disposed over the entire length or a portion of the length of the blade 200. In other embodiments, the noise reducer 100 may be disposed at other locations, such as at the wings of an aircraft, at the propellers of a watercraft, etc., as desired. In the case where the noise reducer 100 is mounted at the trailing edge of the blade 200, the noise generated from the blade 200 can be effectively reduced. When the composite material is applied to airplane wings, propellers of large ships and the like, similar noise reduction effects can be generated.

Although some embodiments of the present invention have been described in the present document, it will be understood by those skilled in the art that these embodiments are shown by way of example only. Numerous variations, substitutions and modifications will occur to those skilled in the art in light of the teachings of the present invention without departing from the scope thereof. It is intended that the following claims define the scope of the invention and that methods and structures within the scope of these claims and their equivalents be covered thereby.

Claims

1. A hollowed-out serration noise reducer comprising:

2. The apparatus of claim 1, wherein the mounting location comprises one of: blades of wind power generators, wings of aircraft, and propellers of ships.

3. The device of claim 1, wherein the gap extends along a length of the serration and has a substantially constant width.

4. The device of claim 1, wherein the serrations have a reduced edge thickness.

5. The device of claim 1, wherein the edges of the serrations are smooth.

6. The device of claim 1, wherein the serrations have an aspect ratio greater than 1.

7. The device of claim 1, wherein the body is an elongated sheet and the plurality of serrations are arranged side-by-side in a length direction of the body.

8. The device of claim 1, wherein the edges of the serrations transition smoothly with the body.

9. A wind power generator comprising an apparatus according to one of claims 1 to 7.