Blade of wind generating set
By setting up webs inside the blades of the wind turbine set to separate the intake and return channels, and openings are set on the surface of the blades, and high-temperature gas is used to heat and deicing, the problem of blade icing is solved, the deicing efficiency and heating uniformity are improved, and the service life of the blades is extended.
Patent Information
- Application Number
- CN202422003498.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-19
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-08-19
AI Technical Summary
In the prior art, the problem of icing of wind turbine blades in cold and humid areas leads to a reduction in the generator operation efficiency and may affect the life of the blades, and the deicing efficiency needs to be improved.
A wind turbine blade is designed, with a web inside to separate the cavity into an intake passage and a return passage. The blade surface covers the outer surface and opens are set on the channel wall. High-temperature gas is used to heat and deicate the ice through the void, and combine heat conduction materials to improve heating uniformity and efficiency.
Through the improved structural design, more efficient and even heating and deicing is achieved, which improves deicing efficiency and extends the service life of the blades.
Smart Images
Figure CN223190560U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wind power generation, in particular to a blade of a wind generator set. Background Art
[0002] Wind power generation technology uses wind turbines to convert wind energy into mechanical energy, and then into electrical energy. Wind power technology has become increasingly mature, and wind power plants have been widely constructed around the world. With the development of the wind power industry, more and more wind farms are being built in cold and humid regions, such as plateaus, and blade icing has become a common problem. Blade icing can reduce generator efficiency, shorten the lifespan of the blades, and even cause them to break.
[0003] In related technologies, deicing can be achieved by heating, using various thermal energies to heat objects, and deicing the surface by electrically heating electrical components and metal devices on the surface of the fuselage. However, the deicing efficiency needs to be improved. Utility Model Content
[0004] In order to solve the above problems, the utility model provides a blade of a wind turbine generator set.
[0005] According to a first aspect of the present invention, a blade of a wind turbine is provided, comprising: a blade body and a blade surface cover; wherein a web is installed in the internal cavity of the blade body along the longitudinal range of the blade body, and the web divides the internal cavity of the blade body into an air inlet channel and a return channel; the blade surface cover fully or partially seals and covers the outer surface of the blade body from the tip area along the longitudinal range of the blade body, and there is a gap between the inner surface of the blade surface cover and the outer surface of the blade body; the outer wall of the air inlet channel and the outer wall of the return channel are both provided with a plurality of openings, and the plurality of openings are all located in the area covered by the blade surface cover.
[0006] In some embodiments, the plurality of openings provided on the outer wall of the air inlet passage are all located in the tip region of the blade body.
[0007] In some embodiments, the outer wall of the inlet passage includes a blade leading edge region of the blade body, and the outer wall of the return passage includes a blade trailing edge region of the blade body.
[0008] In some embodiments, a baffle is installed inside the blade body along the cross-section of the blade body, and the baffle is arranged in the tip area close to the blade body; the area of the baffle located in the air inlet channel is provided with at least one inlet hole, and the area of the baffle located in the return channel is provided with at least one return hole.
[0009] As an example, an air extraction device is installed at the at least one loop hole.
[0010] In some embodiments, the web is configured to be thermally insulating.
[0011] In some embodiments, the blade surface cover is made of a heat-conductive material, and the heat conductivity of the heat-conductive material is greater than the heat conductivity of the outer surface of the blade body.
[0012] According to the blades of the wind turbine generator set of the present invention, the web divides the internal cavity of the blade body into an air inlet channel and a return channel, the blade surface sleeve covers the outer surface of the blade body, and the outer walls of the air inlet channel and the return channel are provided with multiple openings. That is to say, during heating, the hot air flow can enter the gap between the outer surface of the blade body and the inner surface of the blade surface sleeve from the air inlet channel through the openings on the outer wall of the air inlet channel, and melt the ice on the surface of the blade surface sleeve by heat exchange with the blade surface sleeve, which not only improves the heating efficiency, but also makes the heating more uniform, thereby improving the de-icing efficiency.
[0013] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:
[0015] Figure 1 A structural block diagram of a blade of a wind turbine generator set provided by an embodiment of the utility model;
[0016] Figure 2 This is a structural block diagram of a blade of another wind turbine generator set provided by an embodiment of the present utility model. DETAILED DESCRIPTION
[0017] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.
[0018] It should be noted that wind resources refer to energy resources that are converted into electricity through wind power generation technology. Wind energy is a renewable, clean, and low-carbon energy source widely used in power generation, heating, and mechanical power. Wind energy is generated by the movement of air in Earth's atmosphere, typically driven by factors such as pressure differences, Earth's rotation, and topography. Areas on Earth's surface, such as coastlines, hills, grasslands, and deserts, generally have better wind resources. Wind power generation technology uses wind turbines to convert wind energy into mechanical energy, and then into electrical energy. Wind power generation technology has become increasingly mature, and wind power plants have been widely constructed around the world. With the development of the wind power industry, more and more wind farms are being built in cold and humid regions, such as plateaus, which has led to the problem of blade icing. Blade icing can reduce turbine efficiency, shorten the lifespan of the blades themselves, and even cause blade breakage.
[0019] In related technologies, deicing can be achieved by heating, using various thermal energies to heat objects, and deicing the surface by electrically heating electrical components and metal devices on the surface of the fuselage. However, the deicing efficiency needs to be improved.
[0020] In order to solve the above problems, the utility model provides a blade of a wind turbine generator set.
[0021] Figure 1 This is a block diagram of the blade structure of a wind turbine generator set provided by the embodiment of the present utility model. Figure 1 As shown, the blade of the wind turbine generator set in the embodiment of the present invention includes a blade body 2 and a blade surface cover 1. A web 3 is installed in the internal cavity of the blade body 2 along the longitudinal range of the blade body, and the web 3 divides the internal cavity of the blade body 2 into an air inlet channel 4 and a return channel 5; the blade surface cover 1 is sealed and covers the outer surface of the blade body 2 in whole or in part along the longitudinal range of the blade body from the tip area, and there is a gap between the inner surface of the blade surface cover 1 and the outer surface of the blade body 2; the outer wall of the air inlet channel 4 and the outer wall of the return channel 2 are both provided with a plurality of openings, and the plurality of openings are all located in the area covered by the blade surface cover 1. Figure 1 As shown, the outer wall of the air inlet channel 4 is provided with a plurality of air inlet holes 6 , and the outer wall of the return channel 5 is provided with a plurality of air outlet holes 7 .
[0022] In some embodiments of the present invention, a heating device may be provided inside the blade body 2. During heating, the high-temperature gas inside the blade body 2 enters the air inlet channel 4 and passes through the multiple air inlet holes 6 on the outer wall of the air inlet channel 4. The high-temperature gas enters the gap between the inner surface of the blade surface cover 1 and the outer surface of the blade body 2 and is evenly distributed in the gap between the inner surface of the blade surface cover 1 and the outer surface of the blade body 2. The high-temperature gas in the gap heats the outer surface of the blade surface cover 1 to melt the ice on the surface of the blade surface cover 1. The cooled gas enters the return channel 5 through the multiple air outlet holes 7 provided on the outer wall of the return channel 5, and returns to the heating device through the return channel 5 to be heated again to achieve gas reflux.
[0023] In some embodiments, since the tip area of the blade is most susceptible to ice formation, the tip area of the blade body is completely covered by the blade surface cover. The blade surface cover 1 may cover the entire outer surface of the blade body 2, or may only cover the area from the middle of the blade to the tip, that is, cover the area of the blade that is most susceptible to ice formation.
[0024] In some embodiments, the web 3 is mounted in the longitudinal extent of the blade body 2 and is fixedly connected to the inner surface of the blade body 2. The web 3 not only stabilizes the blade body 2 but also separates the internal cavity of the blade body 2 into the inlet channel 4 and the return channel 5.
[0025] In some embodiments, the web 3 is configured to be thermally insulating to reduce heat loss during gas transmission in the air inlet passage 4 .
[0026] In some embodiments, to improve heat transfer, the blade cover 1 is constructed from a heat-conductive material with a thermal conductivity greater than that of the outer surface of the blade body 2. As an example, the blade cover 1 can be constructed from a lightweight metal such as aluminum, or a heat-conductive shell material such as graphite or Kevlar fiber mat. In some embodiments, the blade cover 1 can be at least partially constructed from a heat-conductive material. For example, the blade cover 1 can also include a corresponding high-conductivity powder or granules, or a heat-conductive fiber material and / or heat-conductive resin used to harden glass fiber reinforced plastics.
[0027] Because the blade tip is prone to ice formation, multiple openings are located in the outer wall of the air inlet passage 4, located in the tip of the blade body 2, to improve de-icing efficiency. If ice forms in the tip, the high-temperature gas passing through the openings can directly heat the blade surface film in the tip area, thereby increasing the heating rate and improving de-icing efficiency.
[0028] In some embodiments, because the leading edge region of the blade is more susceptible to ice formation, the leading edge region and the trailing edge region of the blade body can be separated by a web 3. The outer wall of the inlet channel 4 includes the leading edge region of the blade body 2, and the outer wall of the return channel 5 includes the trailing edge region of the blade body 2. The multiple openings provided on the outer wall of the inlet channel are located in the leading edge region of the blade tip, and the multiple openings provided on the outer wall of the return channel are located in the trailing edge region of the blade tip, that is, the inlet opening 6 is located in the leading edge region of the blade tip, and the outlet opening 7 is located in the trailing edge region of the blade tip. In this way, because high-temperature gas flows through the inlet channel, the high-temperature gas passing through the multiple openings in the leading edge region of the blade tip heats the blade surface cover corresponding to the leading edge region of the blade, thereby accelerating the melting of ice in the leading edge region of the blade. The gas after heat exchange enters the return channel through the multiple openings in the trailing edge region of the blade tip.
[0029] According to the blades of the wind turbine generator set in the embodiment of the present invention, the web divides the internal cavity of the blade body into an air inlet channel and a return channel, the blade surface sleeve covers the outer surface of the blade body, and the outer walls of the air inlet channel and the return channel are provided with multiple openings. That is to say, during heating, the hot air flow can enter the gap between the outer surface of the blade body and the inner surface of the blade surface sleeve from the air inlet channel through the openings on the outer wall of the air inlet channel, and melt the ice on the surface of the blade surface sleeve by heat exchange with the blade surface sleeve, which not only improves the heating efficiency, but also makes the heating more uniform, thereby improving the de-icing efficiency.
[0030] In order to improve the heat transfer efficiency, Figure 2 As shown, a baffle 8 is installed inside the blade body along the cross section of the blade body, and the baffle 8 is arranged in the tip area near the blade body 2. At least one inlet hole 9 is provided in the area of the baffle 8 located in the air inlet channel 4, and at least one return hole 10 is provided in the area of the baffle 8 located in the return channel 5. An exhaust device is installed at at least one return hole 10. In this way, the high-temperature gas in the air inlet channel 4 converges at the inlet hole 9 and flows out, and enters the gap between the inner surface of the blade surface film 1 and the outer surface of the blade body 2 through the multiple air inlet holes 6 on the outer wall of the air inlet channel 4 to heat the blade surface film 1, thereby melting the ice, and the cooled gas enters the return channel 5 through the multiple air outlet holes 7 on the outer wall of the return channel 5, and returns through the return hole 10. In other words, adding the baffle 8 and the exhaust device can improve the heat exchange efficiency by increasing the gas flow rate.
[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.
[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.
[0033] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.
[0034] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.
[0035] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.
[0036] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.
Claims
1. A blade of a wind turbine generator set, characterized in that: include: A blade body and a blade surface cover; wherein a web is installed in the internal cavity of the blade body along the longitudinal range of the blade body, and the web divides the internal cavity of the blade body into an air inlet channel and a return channel; the blade surface cover fully or partially seals and covers the outer surface of the blade body from the tip area along the longitudinal range of the blade body, and there is a gap between the inner surface of the blade surface cover and the outer surface of the blade body; the outer wall of the air inlet channel and the outer wall of the return channel are both provided with a plurality of openings, and the plurality of openings are all located in the area covered by the blade surface cover.
2. The blade according to claim 1, characterized in that The multiple openings provided on the outer wall of the air inlet passage are all located in the tip area of the blade body.
3. The blade according to claim 1, characterized in that The outer wall of the air inlet passage includes a blade leading edge region of the blade body, and the outer wall of the return passage includes a blade trailing edge region of the blade body.
4. The blade according to claim 3, characterized in that The multiple openings provided on the outer wall of the air inlet passage are located in the leading edge region of the blade tip of the blade body, and the multiple openings provided on the outer wall of the return passage are located in the trailing edge region of the blade tip of the blade body.
5. The blade according to claim 2 or 4, characterized in that: A baffle is installed inside the blade body along the cross-section of the blade body, and the baffle is arranged in the tip area close to the blade body; the area of the baffle located in the air inlet channel is provided with at least one inlet hole, and the area of the baffle located in the return channel is provided with at least one return hole.
6. The blade according to claim 5, characterized in that An air extraction device is installed at the at least one loop hole.
7. The blade according to claim 1, characterized in that The web is designed to be thermally insulating.
8. The blade according to claim 1, characterized in that The blade surface cover is made of a heat-conductive material, and the heat conductivity of the heat-conductive material is greater than the heat conductivity of the outer surface of the blade body.