CN101555863B - Wind turbine and its impeller - Google Patents

Abstract

A wind driven generator structure comprises a rod body, an impeller and a power generation unit, wherein the impeller is connected to one end of the rod body. The impeller also comprises a hub part, a plurality of blades are annularly arranged on the hub part, each blade is provided with a first surface and a second surface, when the impeller runs, airflow respectively flows through the first surfaces and the second surfaces of the blades, and a rough part is arranged on the blades. The power generation unit is connected to the impeller and can generate power through the driving of the impeller.

Description

Wind turbine and its impeller

technical field

The invention relates to a noise reduction design on a wind power generator and its impeller.

Background technique

In recent years, due to efforts to promote the concept of environmental protection and energy saving at home and abroad, the application of small wind turbines has become more and more common. However, the current design of small wind turbines focuses on the improvement of overall efficiency, but little attention is paid to it. The noise generated when the wind turbine is running, and the impact of the noise on the environment and surrounding residents.

For small wind turbines, they are often installed on buildings to provide nearby residential electricity needs. However, the noise generated during operation has a great impact on residents, interfering with daily routines, affecting quality of life, and even possibly Diseases caused by noise, etc., have become a noise nuisance in energy-saving design.

Therefore, how to provide a generator and its impeller, which can reduce noise during operation and generate electricity, so as to make the small-scale wind generator more acceptable to users and achieve wide application is one of the current important issues.

Contents of the invention

In view of the above problems, the purpose of the present invention is to provide an impeller installed in a generator, which has blades with rough surface design, which can reduce the noise generated by the blades and airflow.

For this reason, in order to achieve the above object, the present invention provides a wind power generator, comprising a rod body, an impeller connected to one end of the rod body, the impeller also includes a hub and a plurality of blade rings arranged on the hub, each blade It has a first surface and a second surface. When the impeller is in operation, the airflow flows through the first surface and the second surface of the blade respectively, a rough part, and a rough part is arranged on each blade, and a power generation unit , connected to the impeller, when the impeller is driven by the airflow, it can transmit the rotational force to the power generation unit to convert the kinetic energy into electric energy for power generation.

According to the technical solution of the present invention, an impeller is provided, comprising:

a hub;

A plurality of blades, which are arranged around the hub, each blade has a first surface and a second surface, when the impeller is running, the airflow flows through the first surface and the first surface of each blade respectively the second surface; and

at least one rough portion, the rough portion is respectively provided on the plurality of blades;

Wherein, each said blade also includes a front wing end, a rear wing end and a blade tip, the rough part extends from the rear wing end of the blade to the front wing end, and is arranged on the first surface of the blade Or on the second surface, and the rough portion extends from the tip of the blade toward the hub, and the roughness of the rough portion is 60-100 particles/mm ² .

In one embodiment of the present invention, preferably, each of the blades further includes a front wing end and a rear wing end, and when the impeller rotates, the airflow passes from the front wing end along the first surface of the blade The rough part extends from the rear wing end of the blade to the front wing end and is disposed on the first surface or the second surface of the blade.

In one embodiment of the present invention, preferably, each of the blades further includes a front wing end, a rear wing end and a blade tip, the blade tip is the position on the blade farthest from the hub, and the The extended width of the rough portion is 13% to 70% of the blade tip width of the blade.

In one embodiment of the present invention, preferably, each of the blades further includes a blade tip, the blade tip is the position on the blade farthest from the hub, and the rough portion is from the blade tip of the blade toward the A hub is extended on the first surface or the second surface of each of the blades.

In one embodiment of the present invention, preferably, the length of the roughness extending is greater than 13% of the length of the blade.

In an embodiment of the present invention, preferably, the rough portion is arranged around the tip of each blade, and the width of the rough portion is 2%-5% of the length of each blade.

In one embodiment of the present invention, preferably, the rough portion has a plurality of concavities and protrusions arranged continuously.

In one embodiment of the present invention, preferably, the rough portion is integrally formed when the plurality of blades are formed, processed by external force after forming, or otherwise attached to each of the blades .

In one embodiment of the present invention, preferably, the plurality of blades are made by injection molding.

According to another aspect of the present invention, a wind power generator is provided, comprising:

an impeller, comprising:

a hub;

A plurality of blades, which are arranged around the hub, each of the blades has a first surface and a second surface, when the impeller is running, the airflow flows through the first surface and the second surface of each of the blades respectively said second surface; and

at least one rough portion, the rough portion is respectively provided on the plurality of blades; and

a power generating unit connected to the impeller;

Each of the blades further includes a front wing end, a rear wing end and a blade tip, the rough portion extends from the rear wing end of the blade to the front wing end, and is arranged on the first surface or On the second surface, and the rough portion extends from the tip of the blade toward the hub, the roughness of the rough portion is 60-100 particles/mm ² .

In one embodiment of the present invention, preferably, when the impeller rotates, the power generation unit converts mechanical energy into electrical energy.

In an embodiment of the present invention, preferably, the wind power generator is erected on a pole or an arbitrary supporting structure.

As mentioned above, the wind generator and its impeller according to the present invention can reduce the noise generated by the airflow and the blades during operation to generate electricity, thereby making the wind generator more acceptable to users and widely used.

Description of drawings

FIG. 1A is a three-dimensional schematic diagram of a wind power generator of the present invention.

Fig. 1B is a three-dimensional schematic diagram of another viewing angle of the wind power generator in Fig. 1A

Fig. 2 is a top view of a blade of a wind power generator according to the first embodiment.

FIG. 3A is a schematic cross-sectional view of part A-A of FIG. 2 .

FIG. 3B is a schematic diagram of the rough part disposed on the surface opposite to that of FIG. 3A .

Fig. 4 is a top view of a blade of a wind power generator according to the second embodiment.

FIG. 5 is a schematic cross-sectional view of the portion B-B in FIG. 4 .

Fig. 6 is the test graph of rotational speed and noise with and without rough parts.

[Description of main component symbols]

10: wind turbine; 11: rod body; 12: impeller; 121: blade; 121a: first surface; 121b: second surface; 122: hub; F: front wing end; B: rear wing end; T: blade tip; A: roughness; W: airflow; R: direction of rotation

Detailed ways

A wind power generator and its impeller according to a preferred embodiment of the present invention, which can reduce noise during operation and generate electricity, will be described below with reference to related drawings, wherein the same components will be described with the same reference symbols.

first embodiment

Please refer to FIG. 1A , FIG. 1B and FIG. 2 at the same time. A wind power generator 10 includes a rod body or an optional support structure 11 , an impeller 12 and a power generation unit (not shown). The impeller 12 is connected to one end of the rod body 11, and the power generation unit is connected to the impeller 12. When the impeller rotates, the power generation unit converts mechanical energy into electrical energy. The impeller 12 includes a hub portion 122 and a plurality of blades 121 , and at least one rough portion A is disposed on the blades 121 . A plurality of blades 121 are disposed on the hub portion 122 . Each blade 121 has a first surface 121a and a second surface 121b. When the impeller 12 is running, the air flows through the first surface 121a and the second surface 121b of the blade 121 respectively. The position of the blade 121 also includes a front wing end F and a rear wing end B. When the impeller 12 rotates in the direction of rotation R, the airflow W close to the blade 121 is along the first surface 121a and a second surface 121a of the blade from the front wing end F. The surface 121b flows to the rear wing end B, and applies the force of the airflow to the blade 121 to drive the hub 122 to rotate.

In addition, the position where the blade 121 is located on the blade 121 farthest from the hub is called the blade tip T, and the above-mentioned rough portion A extends from the rear wing end B of the blade 121 to the first surface 121a or the second surface 121b of the blade 121 (such as 3A and 3B ) are extended to the front wing end F, and the extended width is 13% to 70% of the width of the blade tip T of the blade 121 . The rough portion A can be extended from the blade tip T of the blade to the hub portion 122 on the first surface or the second surface of the blade 121 (as shown in FIGS. 3A and 3B ), and its extended length is longer than that of the blade. 13% of the length of 121.

The rough part A has a plurality of concavities and convex parts arranged continuously to form a rough surface, and the roughness of the rough part A is 60-100 particles/ ^mm2 and can be integrally formed during the injection molding of the blade 121, or otherwise Then it is formed by grinding, or the rough surface with the above conditions is directly adhered to the blade.

second embodiment

Please refer to Fig. 1A, Fig. 1B, Fig. 4 and Fig. 5 at the same time. The difference from the first embodiment is that the rough part A of the second embodiment is arranged around the tip T of each blade 121, and the rough part The width of A is 2% to 5% of the length of the blade 121, and the rough part A has a plurality of continuously arranged concave parts and convex parts to form a so-called rough surface, and the roughness of the rough part is 60 to 100 particles/mm2 ^and It can be integrally formed when the blade 121 is formed, or it can be formed by additional processing, or the rough surface with the above-mentioned conditions can be directly pasted and adhered to the blade.

As mentioned above, according to a kind of wind power generator and its impeller of the present invention, the noise generated by the running airflow and the blades can be reduced when the power generation is in operation. For generators whose blade length is within 60cm and whose rotating speed is below 1000RPM, it can The noise level is reduced by 3-5 decibels (as shown in FIG. 6 ), thereby making the wind power generator more acceptable to users and widely used.

The above description is for illustration only, not for limitation. Any equivalent modification or change made without departing from the spirit and scope of the present invention shall be included in the scope of the appended patent application.

Claims (9)

1. An impeller comprising: a hub; A plurality of blades, which are arranged around the hub, each blade has a first surface and a second surface, when the impeller is running, the airflow flows through the first surface and the first surface of each blade respectively the second surface; and at least one rough portion, the rough portion is respectively provided on the plurality of blades; Wherein, each said blade also includes a front wing end, a rear wing end and a blade tip, the rough part extends from the rear wing end of the blade to the front wing end, and is arranged on the first surface of the blade or on the second surface, and the rough portion extends from the tip of the blade toward the hub, the roughness of the rough portion is 60-100 particles/mm ² , Wherein when the impeller rotates, the airflow flows from the front wing end along the first surface and the second surface of the blade to the rear wing end, and the tip of the blade is the farthest position on the blade from the hub . 2. The impeller according to claim 1, wherein the width extending by the rough portion is 13% to 70% of the blade tip width of the blade. 3. The impeller of claim 1, wherein the roughness extends greater than 13% of the blade length. 4. The impeller according to claim 1, wherein the rough portion has a plurality of concavities and convexities arranged continuously. 5. The impeller according to claim 1, wherein the rough portion is integrally formed when the plurality of blades are formed, is formed by applying external force after the blades are formed, or is otherwise attached to each of the blades superior. 6. The impeller of claim 1, wherein said plurality of blades are injection molded. 7. A wind generator, comprising: an impeller, comprising: a hub; A plurality of blades, which are arranged around the hub, each of the blades has a first surface and a second surface, when the impeller is running, the airflow flows through the first surface and the second surface of each of the blades respectively said second surface; and at least one rough portion, the rough portion is respectively provided on the plurality of blades; and a power generating unit connected to the impeller; Wherein, each said blade also includes a front wing end, a rear wing end and a blade tip, the rough part extends from the rear wing end of the blade to the front wing end, and is arranged on the first surface of the blade or on the second surface, and the rough portion extends from the tip of the blade toward the hub, the roughness of the rough portion is 60-100 particles/mm ² , Wherein when the impeller rotates, the airflow flows from the front wing end along the first surface and the second surface of the blade to the rear wing end, and the tip of the blade is the farthest position on the blade from the hub . 8. The wind power generator according to claim 7, wherein when the impeller rotates, mechanical energy is converted into electrical energy by the power generation unit. 9. The wind power generator according to claim 7, wherein the wind power generator is erected on any supporting structure.

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