Fan blade and wind generating set

Abstract

The utility model relates to the technical field of wind power generation, and provides a fan blade and a wind generating set, the fan blade comprises a blade body, a heat transfer medium inlet pipe and a heat transfer medium return pipe, the outer surface of the blade body is provided with a hydrophobic layer, and the blade body comprises a windward side shell and a leeward side shell which are in butt joint with each other; the heat transfer medium inlet pipe is arranged on the windward side shell and extends in the length direction of the blade body, and an inlet of the heat transfer medium inlet pipe is located at the root of the blade body; the heat-transfer medium return pipe is arranged on the leeside shell, an inlet of the heat-transfer medium return pipe is communicated with an outlet of the heat-transfer medium inlet pipe, an outlet of the heat-transfer medium return pipe is located at the root of the blade body, and a heat medium enters through the heat-transfer medium inlet pipe and flows through the heat-transfer medium inlet pipe and the heat-transfer medium return pipe to heat the blade body. Melting an ice layer on the surface of the blade body; and the freezing time can be delayed through the hydrophobic layer, and the adhesive force of the ice layer is reduced, so that the ice layer is easier to fall off from the blade body, and the deicing efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to wind power generation technical field especially relates to a fan blade and wind generating set. BACKGROUND

[0002] With the growing demand for clean energy worldwide, wind power generation, as an important part of renewable energy, plays an increasingly important role in the energy structure. However, the operation of wind turbine generators in low temperature environment faces many challenges, among which the icing phenomenon on the blade surface is particularly prominent. Under low temperature conditions, the moisture in the air will condense and freeze on the surface of the blade, forming ice layers of different shapes and thicknesses. This icing not only changes the aerodynamic shape of the blade, leading to a significant decrease in its aerodynamic performance, but also increases the weight and unbalanced load of the blade, thereby affecting the operation stability of the entire wind turbine generator. Specifically, icing changes the designed shape of the blade, increasing the surface roughness, which will cause early airflow separation, reduce lift and increase drag, ultimately reducing energy conversion efficiency. In addition, since the icing is usually unevenly distributed, it will cause unbalanced mass distribution of the blade, thereby causing additional mechanical stress and vibration, which poses a serious threat to the long-term stability and reliability of the wind turbine generator.

[0003] In the prior art, the blade deicing method adopts air heating deicing, which has the defect of low efficiency. UTILITY MODEL CONTENTS

[0004] The utility model provides a fan blade and wind generating set to solve the defect that the blade deicing method in the prior art has low efficiency.

[0005] The utility model provides a fan blade, which comprises:

[0006] A blade body, the outer surface of the blade body is provided with a hydrophobic layer, and the blade body comprises a windward surface shell and a leeward surface shell which are mutually butted;

[0007] An ice removal pipeline is arranged in the blade body, and the ice removal pipeline comprises:

[0008] A heat transfer medium inlet pipe is arranged in the windward surface shell and extends along the length direction of the blade body, and the inlet of the heat transfer medium inlet pipe is located at the root of the blade body;

[0009] A heat transfer medium return pipe is arranged in the leeward surface shell, and the inlet of the heat transfer medium return pipe is communicated with the outlet of the heat transfer medium inlet pipe.

[0010] According to the fan blade provided by the utility model, the outlet of the heat transfer medium inlet pipe is located at the tip of the blade body, and the heat transfer medium inlet pipe comprises a curved pipe section and / or a bent pipe section.

[0011] According to the fan blade provided by the utility model, the heat transfer medium inlet pipe is arranged on the inner wall of the windward surface shell, and / or,

[0012] The heat transfer medium inlet pipe is in a wave shape or a zigzag shape along the length direction of the blade body.

[0013] According to the fan blade provided by the utility model, the web plate is arranged between the windward surface shell and the leeward surface shell, and at least part of the heat transfer medium inlet pipe is close to the intersection position of the windward surface shell and the web plate.

[0014] According to the fan blade provided by the utility model, the deicing pipe is a hose.

[0015] The utility model also provides a wind generating set, which comprises:

[0016] A heat source assembly;

[0017] The fan blade described in any one of the preceding aspects, wherein the inlet of the heat transfer medium inlet pipe and the outlet of the heat transfer medium return pipe are respectively communicated with the heat source assembly.

[0018] According to the wind generating set provided by the utility model, the heat source assembly is connected with a fluid driving member and a primary regulating valve.

[0019] According to the wind generating set provided by the utility model, the fan blades are multiple, and the deicing pipe is provided with a secondary regulating valve.

[0020] According to the wind generating set provided by the utility model, the wind generating set further comprises:

[0021] A first temperature measuring member, which is used for measuring the temperature of the blade body;

[0022] An alarm module, which is used for sending an alarm signal when the temperature measured by the first temperature measuring member is abnormal.

[0023] According to the wind generating set provided by the utility model, the blade body is provided with an icing sensor, and the icing sensor is used for monitoring the ice layer thickness of the blade body.

[0024] The fan blade and the wind turbine provided by the utility model, through the windward surface shell arrangement heat transfer medium inlet pipe, the leeward surface shell arrangement heat transfer medium return pipe, the heat medium enters through the heat transfer medium inlet pipe, and flows through the heat transfer medium inlet pipe and the heat transfer medium return pipe, so as to heat the blade body, and make the ice layer on the blade body surface melt; and through the arrangement of the hydrophobic layer on the outer surface of the blade body, the hydrophobic layer can delay the icing time and reduce the adhesion of the ice layer, so that the ice layer after heating and melting cannot be attached to the blade body under the action of the hydrophobic layer, so that the ice layer is more easily detached from the blade body, and the deicing efficiency is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0026] Figure 1 It is the structural schematic view of the fan blade provided by the utility model.

[0027] Figure 2 It is Figure 1 A-A sectional view of it.

[0028] Figure 3 It is the structural schematic view of the blade body provided by the utility model.

[0029] Figure 4 It is the structural schematic view of the wind turbine provided by the utility model.

[0030] Figure 5 It is the structural schematic view of the deicing system of the fan blade provided by the utility model.

[0031] Figure 6 It is one of the flow schematic views of the deicing method of the fan blade provided by the utility model.

[0032] Figure 7 It is the second flow schematic view of the deicing method of the fan blade provided by the utility model.

[0033] Reference signs:

[0034] 100, blade body; 110, windward surface shell; 120, leeward surface shell; 130, web plate;

[0035] 200, deicing pipeline; 210, heat transfer medium inlet pipe; 220, heat transfer medium return pipe;

[0036] 300. Heat source assembly; 310. Electric heater; 320. Water storage tank;

[0037] 400. Pipeline components;

[0038] 410. Water supply pipelines;

[0039] 420. Return water pipeline;

[0040] 430. Primary regulating valve; 431. Main water supply regulating valve; 432. Main return water regulating valve;

[0041] 440. Secondary regulating valve; 441. Branch water supply regulating valve; 442. Branch return water regulating valve;

[0042] 450. Fluid drive components. Detailed Implementation

[0043] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0044] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0046] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0048] The following is combined Figures 1-7 This invention describes the wind turbine blade.

[0049] An embodiment of the first aspect of this utility model provides a wind turbine blade, such as... Figures 1 to 3 As shown, the wind turbine blade includes a blade body 100 and a de-icing pipe 200 disposed on the blade body 100.

[0050] The blade body 100 has a hydrophobic layer (not shown in the figure) on its outer surface. The blade body 100 includes a windward shell 110 and a leeward shell 120 that are connected to each other. The de-icing pipeline 200 includes a heat transfer medium inlet pipe 210 and a heat transfer medium return pipe 220. The heat transfer medium inlet pipe 210 is located on the windward shell 110 and extends along the length of the blade body 100. The inlet of the heat transfer medium inlet pipe 210 is located at the root of the blade body 100. The heat transfer medium return pipe 220 is located on the leeward shell 120. The inlet of the heat transfer medium return pipe 220 is connected to the outlet of the heat transfer medium inlet pipe 210. The outlet of the heat transfer medium return pipe 220 is located at the root of the blade body 100.

[0051] It is understandable that a de-icing pipe 200 is arranged on the blade body 100. By inputting a heat medium into the de-icing pipe 200, the heat medium exchanges heat with the blade body 100 during the process of flowing through the de-icing pipe 200, so as to heat the blade body 100 and melt the ice layer on the surface of the blade body 100.

[0052] Specifically, the blade body 100 includes a windward shell 110 and a leeward shell 120 that are connected to each other. The windward shell 110 is the windward side, and the icing situation on the windward shell 110 is generally more severe than that on the leeward shell 120. Therefore, the de-icing pipeline 200 of this utility model includes a heat transfer medium inlet pipe 210 and a heat transfer medium return pipe 220 that are connected to each other. The heat transfer medium inlet pipe 210 is arranged on the windward shell 110, that is, at the leading edge of the blade; the heat transfer medium return pipe 220 is arranged on the leeward shell 120, that is, at the trailing edge of the blade. In this way, when the heat medium flows through the heat transfer medium inlet pipe 210, the windward shell 110 can be heated preferentially, which can better utilize thermal energy and reduce energy consumption.

[0053] It is understandable that a hydrophobic layer is provided on the outer surface of the blade body 100. The hydrophobic layer allows droplets to bounce off the surface of the blade body 100 before freezing, thereby reducing the possibility of the blade body 100 freezing. After the ice layer on the surface of the blade body 100 melts, the droplets formed cannot adhere to the blade due to the action of the hydrophobic layer, so the ice layer is easier to fall off the blade body 100, thereby improving the de-icing efficiency.

[0054] It should be noted that if the wind turbine blades use an electrothermal de-icing method, this method involves installing heating elements on the blade body 100. During thunderstorms, the conductive parts of the heating elements may become the preferred path for lightning strikes, leading to damage to the wind turbine blades or other components, or even causing electrical faults or fires. In contrast, this invention uses a heat transfer medium in the de-icing pipe 200 to heat the blade body 100, and works synergistically with the hydrophobic layer. This method is highly efficient, energy-saving, and safe, and can adapt to various harsh climatic conditions, ensuring the stable operation of the wind turbine generator set.

[0055] The wind turbine blade provided in this embodiment of the utility model has a heat transfer medium inlet pipe 210 arranged on the windward side shell 110 and a heat transfer medium return pipe 220 arranged on the leeward side shell 120. The heat medium enters through the heat transfer medium inlet pipe 210 and flows through the heat transfer medium inlet pipe 210 and the heat transfer medium return pipe 220 to heat the blade body 100, thereby melting the ice layer on the surface of the blade body 100. By providing a hydrophobic layer on the outer surface of the blade body 100, the hydrophobic layer can delay the freezing time and reduce the adhesion of the ice layer, so that the ice layer after heating and melting cannot adhere to the blade body 100 under the action of the hydrophobic layer, thereby making it easier for the ice layer to fall off the blade body 100 and improving the de-icing efficiency.

[0056] In one embodiment of this utility model, such as Figure 1 and Figure 2 As shown, the heat transfer medium inlet pipe 210 is arranged on the inner wall of the windward shell 110, and the heat transfer medium return pipe 220 is arranged on the inner wall of the leeward shell 120. The inlet of the heat transfer medium inlet pipe 210 is located at the root of the blade body 100, and the outlet of the heat transfer medium inlet pipe 210 is located at the tip of the blade body 100. The inlet of the heat transfer medium return pipe 220 is located at the tip of the blade body 100, and the outlet of the heat transfer medium inlet pipe 210 and the inlet of the heat transfer medium return pipe 220 are connected. The inlet of the heat transfer medium inlet pipe 210 and the outlet of the heat transfer medium return pipe 220 are respectively connected to the heat source assembly 300.

[0057] Understandably, the heat medium generated by the heat source component 300 enters the heat transfer medium inlet pipe 210 through the heat transfer medium inlet pipe, and flows through the heat transfer medium inlet pipe 210 and the heat transfer medium return pipe 220 before returning to the heat source component 300 through the heat transfer medium return pipe outlet. In this way, the heat medium exchanges heat with the windward shell 110 and the leeward shell 120 during the process of flowing through the heat transfer medium inlet pipe 210 and the heat transfer medium return pipe 220, so as to heat the windward shell 110 and the leeward shell 120, melt the ice layer on the surface of the blade body 100, and the melted ice layer falls off the blade body 100, thereby realizing the rapid de-icing of the wind turbine blade.

[0058] Furthermore, the blade body 100 also includes a web 130 disposed between the windward shell 110 and the leeward shell 120. One end of the web 130 near the tip of the blade body 100 has a mounting position for connecting the outlet of the heat transfer medium inlet pipe 210 and the inlet of the heat transfer medium return pipe 220. It should be noted that the mounting position can also be a mounting notch formed between the web 130 and the inner wall of the tip of the blade body 100.

[0059] In one embodiment of this utility model, the heat transfer medium inlet pipe 210 includes a curved pipe section. The curved pipe section achieves the change of pipe direction through continuous and smooth arc bending, which can significantly increase the heat exchange area and improve the heat transfer efficiency.

[0060] It should be noted that the heat transfer medium inlet pipe 210 may also include a bent pipe section; of course, the heat transfer medium inlet pipe 210 may also include both a bent pipe section and a bent pipe section at the same time, so as to increase the path of the heat medium through the heat transfer medium inlet pipe 210, thereby increasing the heat exchange area and improving the heat transfer efficiency.

[0061] In this embodiment, the heat transfer medium inlet pipe 210 is wavy along the length of the blade body 100. This periodic undulating structure can significantly increase the heat exchange area and improve heat transfer efficiency. A curved pipe section can be used at the root of the wind turbine blade to achieve inlet reversal, a wavy pipe section can be used in the middle region to enhance heat exchange, and a bent pipe section can be used at the tip of the wind turbine blade to adapt to narrow spaces. It should be noted that in other embodiments, the heat transfer medium inlet pipe 210 can also adopt other arrangements, such as extending in a serrated shape along the length of the blade body 100.

[0062] Optionally, at least a portion of the heat transfer medium inlet pipe 210 is located near the intersection of the windward side of the shell 110 and the web 130.

[0063] It is understandable that the heat transfer medium inlet pipe 210 is wavy along the length of the blade body 100, that is, the heat transfer medium inlet pipe 210 adopts a curved and meandering pipeline arrangement. Some of the peaks or troughs of the curve are close to the intersection line of the inner wall of the windward shell 110 and the web plate 130, thereby increasing the contact area between the heat transfer medium inlet pipe 210 and the windward shell 110, extending the heat exchange time, and thus enhancing the de-icing effect.

[0064] Furthermore, all the crests and troughs of the heat transfer medium inlet pipe 210 are located near the intersection line between the inner wall of the windward shell 110 and the web 130, which further increases the contact area between the heat transfer medium inlet pipe 210 and the windward shell 110.

[0065] In one embodiment of this utility model, the de-icing pipeline 200 is a flexible hose.

[0066] Understandably, the de-icing pipe 200 uses PE-RT (heat-resistant polyethylene) hose, which has good flexibility and heat resistance, is easy to construct, safe and durable, and has a long service life. The diameter of the de-icing pipe 200 is 40mm. The de-icing pipe 200 is closely attached to the inner wall of the blade body 100, and the heat transfer medium inlet pipe 210 is laid in a curved shape along the leading edge of the blade.

[0067] The second aspect of this utility model provides a wind turbine generator set, such as... Figure 4 As shown, the wind turbine generator set includes a heat source assembly 300 and wind turbine blades provided in any of the above embodiments; wherein the inlet of the heat transfer medium inlet pipe 210 and the outlet of the heat transfer medium return pipe 220 are respectively connected to the heat source assembly 300.

[0068] Understandably, the heat medium generated by the heat source component 300 enters the de-icing pipe 200 and exchanges heat with the blade body 100. The heat-exchanged medium then flows back to the heat source component 300. In this way, the heat medium heats the blade body 100 as it flows through the de-icing pipe 200, causing the ice layer on the surface of the blade body 100 to melt. The melted ice layer then falls off the blade body 100, thereby achieving rapid de-icing of the blade body 100.

[0069] It should be noted that the wind turbine generator set includes a main shaft and wind turbine blades connected to the main shaft. The end of the blade body 100 connected to the main shaft is the root of the blade body 100, and the end of the blade body 100 away from the main shaft is the tip of the blade body 100.

[0070] Optional, such as Figure 5 As shown, the heat source assembly 300 includes an electric heater 310 and a water storage tank 320. The electric heater 310 and the water storage tank 320 work together to provide a stable heat energy supply. The electric heater 310, as the core heat source, efficiently converts electrical energy into heat energy through resistance heating or instant heating technology to heat the water in the water storage tank 320.

[0071] In one embodiment of the present invention, the heat source assembly 300 is connected to a fluid drive component 450 and a primary regulating valve 430.

[0072] Understandably, the heat source assembly 300 and the de-icing pipeline 200 are connected to form a circulation loop, and a fluid drive unit 450 is arranged on the circulation loop to drive the heat medium to circulate in the circulation loop; and the flow rate of the heat medium is regulated by a first-stage regulating valve 430 arranged on the circulation loop.

[0073] In this embodiment, the heat source component 300 includes an electric heater 310 and a water storage tank 320. The electric heater 310 is connected to the water storage tank 320 and is used to continuously heat the water in the water storage tank 320. The outlet of the water storage tank 320 is connected to the inlet of the heat transfer medium inlet pipe 210 through the water supply pipeline 410, and the outlet of the heat transfer medium return pipe 220 is connected to the inlet of the water storage tank 320 through the return water pipeline 420. The fluid drive component 450 is a circulation pump installed on the water supply pipeline 410 and is used to drive the heat medium to circulate in the circulation loop. The primary regulating valve 430 includes a main water supply regulating valve 431 installed on the water supply pipeline 410 and a main return water regulating valve 432 installed on the return water pipeline 420, thereby regulating the flow rate of hot water through the main water supply regulating valve 431 and the main return water regulating valve 432.

[0074] In one embodiment of this utility model, when there are multiple wind turbine blades, there are multiple de-icing pipes 200. The multiple de-icing pipes 200 are arranged one-to-one with the multiple blade bodies 100, and each de-icing pipe 200 is provided with a secondary regulating valve 440.

[0075] Understandably, when a wind turbine generator set includes multiple turbine blades, multiple de-icing pipes 200 are arranged one-to-one with multiple blade bodies 100. Each blade body 100 is independently equipped with a de-icing pipe 200 to ensure the independent de-icing needs of each blade body 100 in low-temperature environments. A heat medium (such as water) within the de-icing pipe 200 heats the surface of the corresponding blade body 100 for effective de-icing. Each de-icing pipe 200 is connected to an independent secondary regulating valve 440 to control the flow rate of the heat medium within the de-icing pipe 200, thereby achieving differentiated adjustment based on the actual icing conditions of the multiple blade bodies 100. In this way, by controlling the opening degree of the secondary regulating valve 440 of each de-icing pipe 200, energy consumption is reduced while ensuring anti-icing effectiveness.

[0076] In this embodiment, the de-icing pipeline 200, the water supply pipeline 410, and the return water pipeline 420 all use PE-RT (heat-resistant polyethylene) flexible hoses. This material has good flexibility and heat resistance, is easy to construct, safe and durable, and has a long service life.

[0077] Specifically, the de-icing pipe 200 can be a single flexible hose. One part is arranged on the inner wall of the windward shell 110, extending from the root to the tip along the length of the wind turbine blade. The other part is arranged on the inner wall of the leeward shell 120, extending from the tip to the root along the length of the wind turbine blade. The two parts are connected at the tip, forming a complete circulation loop. Thus, the de-icing pipe 200 has a U-shaped loop design, allowing the heat medium to flow in from the blade root, be transported to the blade tip through the heat transfer medium inlet pipe 210, and then return through the heat transfer medium return pipe 220, achieving uniform heating and de-icing of the entire blade body 100 structure. It should be noted that the de-icing pipe 200 uses a single flexible hose arrangement, reducing system complexity. At the same time, the flexible hose can adapt to the deformation of the wind turbine blade during operation, ensuring the reliability of the wind turbine generator set.

[0078] It should be noted that the de-icing pipeline 200 can be directly and independently installed on the existing blade body 100 without modifying the existing design of the blade body 100. This simplifies the construction process and reduces the modification cost. At the same time, since there is no need to modify the blade design, it can avoid the decline in blade performance or safety hazards caused by improper modification. Therefore, the wind turbine blade of this embodiment has a wide range of application prospects in the field of wind turbine de-icing.

[0079] In one embodiment of this utility model, a first temperature measuring element (not shown in the figure) is provided on the blade body 100. The first temperature measuring element is used to measure the temperature of the blade body 100. The wind turbine generator set also includes an alarm module, which is used to issue an alarm signal when the temperature measured by the first temperature measuring element is abnormal.

[0080] Understandably, when the first temperature measuring device detects an abnormal temperature of 100°C on the blade body, the alarm module will issue an alarm signal to remind maintenance personnel, thereby improving the operational reliability and maintenance efficiency of the wind turbine in low-temperature environments.

[0081] In one embodiment of this utility model, an icing sensor (not shown in the figure) is provided on the blade body 100. The icing sensor is used to monitor the ice thickness of the blade body 100, thereby adjusting the operating parameters of the heat source component 300 based on the ice thickness.

[0082] Based on the de-icing pipeline 200 provided in any of the above embodiments, the third aspect of this utility model proposes a wind turbine blade de-icing system, such as... Figure 1 , Figure 3 and Figure 5 As shown, the de-icing system includes a de-icing pipe 200 and a heat source assembly 300. The de-icing pipe 200 is arranged on the blade body 100, and the heat source assembly 300 is connected to the de-icing pipe 200. The heat source assembly 300 is used to inject a heat medium into the de-icing pipe 200 to heat the blade body 100.

[0083] Optionally, the blade body 100 includes a windward shell 110 and a leeward shell 120 that are connected to each other. The de-icing pipeline 200 includes a heat transfer medium inlet pipe 210 and a heat transfer medium return pipe 220 that are connected to each other. The heat transfer medium inlet pipe 210 is arranged on the windward shell 110, and the heat transfer medium return pipe 220 is arranged on the leeward shell 120. The inlet of the heat transfer medium inlet pipe 210 and the outlet of the heat transfer medium return pipe 220 are respectively connected to the heat source assembly 300 to form a circulation loop.

[0084] In one embodiment of the present invention, the de-icing system further includes an icing sensor and a control module. The icing sensor is arranged on the outer surface of the blade body 100 and is used to obtain the ice thickness on the surface of the blade body 100. The control module is electrically connected to the icing sensor and the heat source component 300 respectively, and is used to determine the target parameters of the heat source component 300 based on the ice thickness and the current ambient temperature.

[0085] Understandably, by arranging icing sensors on the outer surface of the blade body 100, the icing on the surface of the blade body 100 is monitored in real time. The control module, as the core of the system, integrates the data from the icing sensors and the ambient temperature data, and dynamically adjusts the operating parameters of the heat source component 300 to achieve efficient and energy-saving de-icing operation.

[0086] In an optional embodiment of the present invention, the de-icing system includes a heat source component 300 and a pipe network component 400. The pipe network component 400 includes a water supply pipeline 410, a return water pipeline 420, and multiple de-icing pipelines 200.

[0087] The heat source component 300 includes an electric heater 310 and a water storage tank 320. The electric heater 310 is connected to the water storage tank 320 and is used to continuously heat the water in the water storage tank 320. When the water storage tank 320 inputs hot water into the de-icing pipeline 200, hot water is used as the heat medium. The high heat capacity of water makes heat transfer more efficient, and the physical stability of water ensures that pressure fluctuations in the pipeline component 400 are minimized, thereby achieving stable operation of the de-icing system and reducing energy consumption. The outlet water temperature of the water storage tank 320 is controlled by adjusting the power of the electric heater 310. To avoid overheating of the blade body 100, the maximum outlet water temperature of the water storage tank 320 is 55°C. In this embodiment, the outlet water temperature setting range of the water storage tank 320 is 30~55°C.

[0088] It should be noted that in other embodiments, the heat medium input by the heat source component 300 to the de-icing pipe 200 may also be other heat transfer media such as heat transfer oil or hot air.

[0089] The inlet of the water supply pipeline 410 is connected to the outlet of the water storage tank 320, the inlets of multiple de-icing pipelines 200 are connected to the outlet of the water supply pipeline 410, the outlets of multiple de-icing pipelines 200 are connected to the inlet of the return water pipeline 420, and the outlet of the return water pipeline 420 is connected to the inlet of the water storage tank 320.

[0090] Optionally, a fluid drive unit 450 is provided on the water supply line 410, and the fluid drive unit 450 is a circulating pump.

[0091] Furthermore, the pipeline assembly 400 also includes a primary regulating valve 430, which includes a main supply regulating valve 431 installed on the supply pipeline 410 and a main return regulating valve 432 installed on the return pipeline 420. It should be noted that in other embodiments, the primary regulating valve 430 may include only the main supply regulating valve 431 or the main return regulating valve 432.

[0092] Furthermore, each de-icing pipe 200 is also equipped with a secondary regulating valve 440. The secondary regulating valve 440 includes a branch water supply regulating valve 441 and a branch water return regulating valve 442. The branch water supply regulating valve 441 is located in the heat transfer medium inlet pipe 210, and the branch water return regulating valve 442 is located in the heat transfer medium return pipe 220.

[0093] The circulating pump and primary regulating valve 430 control the overall flow rate, while the secondary regulating valve 440 regulates the flow rate of the de-icing pipes 200 on each blade body 100. The system forms an overall control strategy by adjusting the heating power of the heat source component 300 and the opening degree of the regulating valves to ensure that all parts work in coordination.

[0094] Understandably, multiple de-icing pipes 200 are arranged one-to-one with multiple blade bodies 100, with each blade body 100 independently equipped with a de-icing pipe 200 to ensure the independent de-icing needs of each blade body 100 in low-temperature environments. The heat medium within the de-icing pipe 200 heats the surface of the corresponding blade body 100 for effective de-icing. Each de-icing pipe 200 is connected to an independent secondary regulating valve 440, which can independently adjust the flow rate of the heat medium within the de-icing pipe 200 according to the icing condition of each blade body 100 and the ambient temperature, thus achieving differentiated adjustment based on the actual icing conditions of multiple blade bodies 100. In this way, by controlling the opening degree of the secondary regulating valve 440 of each de-icing pipe 200, de-icing efficiency is improved while energy consumption is reduced.

[0095] For example, taking a 100m long blade body 100 as an example, the electric heater 310 is configured with a power of 50 kW, the water storage tank 320 is a 3 m³ barrel-shaped structure, and the heat source component 300 and the circulation pump are integrated into the hub. The piping of the pipeline assembly 400 uses PE-RT (heat-resistant polyethylene) flexible hoses. The water supply pipeline 410 and the return water pipeline 420 are the main pipelines with a diameter of 75mm; the de-icing pipeline 200 is a branch pipeline with a diameter of 40mm, and is arranged close to the inner wall of the blade body 100. The heat transfer medium inlet pipe 210 of the de-icing pipeline 200 is arranged in a curved shape along the leading edge of the blade. It should be noted that the wind turbine generator set includes a main shaft and multiple wind turbine blades connected to the main shaft. The roots of the multiple blade bodies 100 are connected to the main shaft through the hub.

[0096] In one embodiment of this utility model, the de-icing system further includes a first temperature measuring element and a second temperature measuring element. The first temperature measuring element is disposed on the blade body 100 and is used to measure the temperature of the blade body 100. The second temperature measuring element is disposed on the heat source assembly 300 and is used to measure the temperature of the heat medium in the heat source assembly 300. It should be noted that the second temperature measuring element can be disposed on the water storage tank 320 or at the outlet of the water storage tank 320.

[0097] The first and second temperature measuring devices are temperature sensors.

[0098] It is understandable that an icing sensor is installed on the surface of the blade body 100 to monitor the icing status of the blade in real time; temperature sensors are installed on the surfaces of the heat source assembly 300 and the blade body 100 to monitor the temperature of the heat source and the blade body 100 in real time; the control module is electrically connected to the icing sensor, the first temperature measuring element, and the second temperature measuring element, respectively. The control module is used to acquire data from the icing sensor and obtain the ice layer thickness based on the icing sensor data. When the ice layer thickness reaches a preset threshold, the start command of the heat source assembly 300 will be triggered. After receiving the start command, the heat source assembly 300 generates hot water, which is transported to the blade body 100 through the pipe network assembly 400 for circulating heating to melt the ice layer on the blade body 100.

[0099] During the de-icing process, the first and second temperature measuring devices monitor the temperature of the heat source and the blade body 100 in real time. Based on the data measured by the first and second temperature measuring devices, the control module can adjust the operating parameters of the electric heater 310, such as the heating temperature and time of the electric heater 310, to achieve efficient and energy-saving de-icing operation.

[0100] Furthermore, the de-icing system also includes an alarm module, which is electrically connected to the control module.

[0101] Understandably, the de-icing system has an abnormal temperature monitoring function. When the first temperature measuring device detects a heat source or the second temperature measuring device detects an abnormal temperature on the blade body 100, the control module sends an alarm command to the alarm module. Based on this alarm command, the alarm module issues an alarm signal to remind maintenance personnel to pay attention. It should be noted that the de-icing system also has a self-protection mechanism. In the event of abnormal temperature or other potential hazards, it will automatically cut off the heat source component 300 to ensure the safe operation of the wind turbine generator.

[0102] The wind turbine blade de-icing system provided in this embodiment integrates a temperature control and monitoring early warning mechanism to achieve precise and efficient de-icing operation, thereby meeting the requirements of the wind power generation field for stable, efficient, and low-energy de-icing technology.

[0103] In one embodiment of the present invention, the de-icing system further includes a hydrophobic layer disposed on the outer surface of the blade body 100.

[0104] Understandably, the hydrophobic layer can be a superhydrophobic coating, which delays icing and reduces ice adhesion, creating favorable conditions for hydrothermal de-icing. In this way, the heat energy provided by the heat source component 300 accelerates the melting of ice and, together with the synergistic effect of the hydrophobic layer, achieves a low-energy-consumption and high-efficiency de-icing (anti-icing) effect.

[0105] The wind turbine blade de-icing system provided in this embodiment of the invention utilizes the high heat capacity of water to significantly improve heat transfer efficiency. Simultaneously, the good physical stability of water ensures the stable operation of the heating system, thereby reducing overall energy consumption. Furthermore, the application of a hydrophobic layer effectively delays icing time and reduces ice adhesion, further reducing the energy required for de-icing. By monitoring blade temperature, ice thickness, and ambient temperature in real time, heating parameters and circulation efficiency can be controlled, avoiding energy waste. Thus, this invention not only significantly improves the anti-icing and de-icing efficiency of wind turbine blades but also reduces energy consumption and operating costs, providing strong support for the sustainable development of the wind power industry.

[0106] Based on the wind turbine blade de-icing system provided in any of the above embodiments, the fourth aspect of this utility model proposes a wind turbine blade de-icing method, such as... Figure 6 As shown, the de-icing method includes the following steps:

[0107] S1. Obtain the ice layer thickness on the surface of the blade body 100.

[0108] S2. Based on the ice thickness and the current ambient temperature, determine the target parameters of the heat source component 300.

[0109] Understandably, based on the ice thickness on the surface of the blade body 100 and the current ambient temperature, the target parameters of the heat source component 300 are determined so that the heat medium generated by the heat source component 300 enters the de-icing pipe 200 and exchanges heat with the blade body 100. The heat-exchanged medium flows back to the heat source component 300, thereby heating the blade body 100 as it flows through the de-icing pipe 200, melting the ice layer on the surface of the blade body 100. The melted ice layer then falls off the blade body 100, thus achieving rapid de-icing of the wind turbine blade.

[0110] It should be noted that by monitoring the ice thickness and the current ambient temperature, the operating parameters of the heat source component 300 can be determined according to different ice thicknesses and different current ambient temperatures, thereby realizing the regulation of the operating parameters of the heat source component 300 and achieving an efficient and energy-saving de-icing process.

[0111] According to an embodiment of the present invention, the heat source component 300 includes an electric heater 310 and a water storage tank 320. The target parameter of the heat source component 300 can be the outlet temperature of the water storage tank 320. The outlet temperature of the water storage tank 320 can be adjusted by changing the power supply frequency of the electric heater 310. The heating power can be automatically adjusted according to the inlet water temperature and the set outlet water temperature.

[0112] Optionally, the electric heater 310 is a variable frequency electric heater, and the water storage tank 320 is a barrel-shaped water storage tank. The higher the water temperature and the faster the water flow, the more heat transfer can be ensured.

[0113] Optional, such as Figure 7 As shown, step S2 may include the following steps:

[0114] S21. Given that the ice layer thickness is within a first preset thickness range, determine the target outlet temperature of the heat source component 300 and the target flow rate of the heat medium based on the current ambient temperature.

[0115] It is understandable that when the ice layer thickness is within the first preset thickness range, it means that the ice layer on the blade body 100 is relatively thick. The outlet temperature of the heat source component 300 can be designed to be a higher temperature, and the outlet temperature of the heat source component 300 can be adjusted based on the current ambient temperature to obtain the target outlet temperature of the heat source component 300.

[0116] For example, when the ice layer thickness is within the first preset thickness range, the target flow rate of the heat medium can be increased to prioritize meeting the needs of rapid de-icing.

[0117] S22. When the ice layer thickness is within a second preset thickness range, determine the target outlet temperature of the heat source component 300 and the target flow rate of the heat medium based on the change in ice layer thickness.

[0118] Understandably, when the ice layer thickness is within the second preset thickness range, it indicates that the ice layer on the blade body 100 is of medium thickness. A balance needs to be struck between the ice melting rate and energy consumption. The target outlet temperature of the heat source component 300 and the target flow rate of the heat medium can be dynamically adjusted according to changes in the ice layer thickness. For example, if the ice layer continues to thin, the outlet temperature of the heat source component 300 and the flow rate of the heat medium can be lowered to reduce energy consumption while ensuring ice melting efficiency.

[0119] S23. When the ice layer thickness is within the third preset thickness range, determine the target outlet temperature of the heat source component 300 based on the dew point temperature and the current ambient temperature, and determine the target flow rate of the heat medium based on the current ambient temperature.

[0120] The first preset thickness range is greater than the second preset thickness range, and the second preset thickness range is greater than the third preset thickness range.

[0121] It is understandable that when the ice layer thickness is within the third preset thickness range, it means that the ice layer on the blade body 100 is a thin ice layer. Based on the dew point temperature and the current ambient temperature, the outlet temperature of the heat source component 300 and the flow rate of the heat medium can be set, and a low flow rate can be used to minimize energy consumption and maintain only the necessary heating to prevent the icing from worsening.

[0122] Optionally, step S21 includes the following:

[0123] When the ice layer thickness is within the first preset thickness range, the current ambient temperature is matched with multiple preset temperature ranges; the preset outlet temperature corresponding to the preset temperature range in which the current ambient temperature is located is determined as the target outlet temperature; and the maximum allowable flow rate of the de-icing pipeline 200 is determined as the target flow rate of the heat medium.

[0124] Understandably, when the ice layer thickness is within the first preset thickness range, multiple preset temperature ranges are set to correspond to the outlet water temperature. The current ambient temperature is matched with multiple preset temperature ranges to determine the preset temperature at which the current ambient temperature is located, and the preset outlet temperature corresponding to the preset temperature at which the current ambient temperature is located is determined as the target outlet temperature.

[0125] For example, the first preset thickness is greater than or equal to 4 mm, and the setting principle between multiple preset temperature ranges and preset outlet temperature is as follows (1).

[0126] (1)

[0127] in, Indicates the preset ambient temperature. This indicates the preset outlet temperature; there are three preset temperature ranges, namely (-∞, -15℃], (-15℃, -5℃] and (-5℃, -0℃], with corresponding preset outlet temperatures of 50℃, 45℃ and 40℃ respectively; when the current ambient temperature is (-15℃, -5℃], the target outlet temperature is set to 45℃.

[0128] When the icing sensor detects the ice thickness delta ice ≥4mm, the de-icing system will start automatically and determine the target outlet temperature of the heat source component based on the current ambient temperature and formula (1).

[0129] The lower limit of the flow rate of the de-icing pipeline 200 is 0.5 L / s (liters per second) to ensure turbulence; the upper limit of the flow rate of the de-icing pipeline 200 is 5 L / s to ensure the pressure limit of the pipeline; in this embodiment, 4 L / s is set as the target flow rate of the de-icing pipeline 200. It should be noted that the flow rate of the de-icing pipeline 200 can be adjusted by the primary regulating valve 430, the secondary regulating valve 440, and the fluid drive component 450 to make the flow rate of the de-icing pipeline 200 reach the target flow rate.

[0130] Optionally, step S22 includes the following:

[0131] When the ice thickness is within the second preset thickness range, determine the current ice thickness at the current moment; based on the current ice thickness and the ice thickness corresponding to the previous moment, determine the ice change; based on the target outlet temperature corresponding to the previous moment and the ice change, reduce the current target outlet temperature; based on the target flow rate corresponding to the previous moment and the ice change, reduce the current target flow rate.

[0132] Understandably, when the icing sensor detects that the ice layer thickness is within the second preset thickness range, the outlet temperature of the heat source component 300 and the flow rate of the heat medium in the de-icing pipeline 200 can be reduced based on the change in ice layer thickness. It should be noted that the outlet temperature of the heat source component 300 can be adjusted by regulating the operating parameters of the electric heater 310; the flow rate of the heat medium in the de-icing pipeline 200 can be adjusted by regulating the operating parameters of the fluid drive component 450, as well as the opening degrees of the primary regulating valve 430 and the secondary regulating valve 440.

[0133] For example, the second preset thickness range is greater than 1 mm and less than 4 mm; when the icing sensor detects that the ice layer thickness meets the requirement of 4 mm > 1 mm, the thickness is measured to be within the range of 1 mm. delta ice >1mm, the outlet temperature of the heat source component decreases according to formula (2).

[0134] (2)

[0135] in, Indicates the current target outlet temperature. This represents the target outlet temperature at the previous moment (i.e., the previous target outlet temperature). Indicates the current ice thickness. This indicates the ice thickness at the previous moment (i.e., the previous ice thickness).

[0136] In this embodiment, the ice thickness is measured every 2 minutes. When the ice thickness is 4mm, this is the previous time point. It is 45℃. The thickness is 4mm; after 2 minutes, the current ice thickness is obtained. The current target outlet temperature is calculated based on formula (2), given a value of 2mm. = 45×0.75=33.75℃ (rounded to 34℃), thus realizing the update of the outlet temperature of the heat source component.

[0137] For example, when the icing sensor detects that the ice thickness meets the requirement of 4mm > delta ice >1mm, the flow rate of the de-icing pipeline is reduced according to formula (3).

[0138] (3)

[0139] in, Indicates the current target traffic. This represents the target flow corresponding to the previous moment (i.e., the previous target flow).

[0140] In this embodiment, the ice thickness is measured every 2 minutes. When the ice thickness is 4mm, this is the previous time point. It is 4L / s. The thickness is 4mm; after 2 minutes, the current ice thickness is obtained. The current target flow rate is 2mm, calculated based on formula (3), and obtained as follows: = 45×0.8=3.2L / s, thereby realizing the renewal of the heat medium flow rate in the de-icing pipeline.

[0141] Optionally, in step S23, determining the target outlet temperature of the heat source component 300 based on the dew point temperature and the current ambient temperature may include the following:

[0142] When the ice layer thickness is within the third preset thickness range, the sum of the dew point temperature and the first preset temperature value is determined as the first target temperature; the sum of the current ambient temperature and the second preset temperature value is determined as the second target temperature; wherein the second preset temperature value is greater than the first preset temperature value; the larger of the first target temperature and the second target temperature is determined as the target outlet temperature.

[0143] Understandably, when the ice layer thickness is within the third preset thickness range, the system needs to prevent the addition of new or residual water from freezing with the lowest energy consumption. Therefore, the target outlet temperature setting takes into account the dew point temperature (to prevent secondary freezing) and the current ambient temperature (to ensure basic ice melting capacity). Thus, by constraining the dew point temperature, the risk of "ice melting and immediate freezing" is eliminated, and the system can still automatically maintain effective ice melting when the ambient temperature changes abruptly.

[0144] In this embodiment, the third preset thickness range is less than or equal to 1 mm; when the ice layer thickness is less than or equal to 1 mm, the system maintains low power to prevent secondary icing, and the outlet temperature setting principle of the heat source component 300 is as follows (4).

[0145] (4)

[0146] in, This indicates the outlet temperature of the heat source component. Indicates the dew point temperature. This indicates the current ambient temperature.

[0147] It should be noted that, compared to frequent start-stop cycles, this embodiment maintains the outlet water temperature. It can achieve a highly efficient and energy-saving de-icing process.

[0148] Furthermore, in step S23, the target flow rate of the heat medium is determined based on the current ambient temperature, including the following:

[0149] When the current ambient temperature is greater than or equal to the third preset temperature value, the minimum allowable flow rate of the de-icing pipeline is determined as the target flow rate of the heat medium.

[0150] For example, the flow rate setting principle for the de-icing pipeline is as follows (5).

[0151] (5)

[0152] in, This indicates the flow rate of the de-icing pipeline.

[0153] It should be noted that, under ambient temperature >0℃, and delta ice =0, duration >1h, de-icing ends.

[0154] The wind turbine blade de-icing method provided in this embodiment of the invention monitors the ice layer thickness and, based on the ice layer thickness, adjusts the outlet temperature of the heat source component and the flow rate of the heat medium in the de-icing pipeline in real time. This can improve de-icing efficiency while reducing energy consumption, thereby meeting the requirements of the wind power generation field for stable, efficient, and low-energy de-icing technology.

[0155] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A wind turbine blade, characterized in that, include: The blade body has a hydrophobic layer on its outer surface and includes a windward shell and a leeward shell that are connected to each other. De-icing piping, disposed on the blade body, the de-icing piping includes: A heat transfer medium inlet pipe is disposed on the windward side of the shell and extends along the length of the blade body. The inlet of the heat transfer medium inlet pipe is located at the root of the blade body. A heat transfer medium return pipe is provided on the leeward side of the shell, and the inlet of the heat transfer medium return pipe is connected to the outlet of the heat transfer medium inlet pipe.

2. The wind turbine blade according to claim 1, characterized in that, The outlet of the heat transfer medium inlet pipe is located at the tip of the blade body, and the heat transfer medium inlet pipe includes a curved pipe section and / or a bent pipe section.

3. The wind turbine blade according to claim 2, characterized in that, The heat transfer medium inlet pipe is disposed on the inner wall of the windward side of the shell, and / or, The heat transfer medium inlet pipe is wavy or serrated along the length of the blade body.

4. The wind turbine blade according to claim 3, characterized in that, A web is provided between the windward shell and the leeward shell, and at least a portion of the heat transfer medium inlet pipe is located near the intersection of the windward shell and the web.

5. The wind turbine blade according to claim 2, characterized in that, The de-icing pipeline uses a flexible hose.

6. A wind turbine generator set, characterized in that, include: Heat source components; The fan blade as described in any one of claims 1 to 5, wherein the inlet of the heat transfer medium inlet pipe and the outlet of the heat transfer medium return pipe are respectively connected to the heat source assembly.

7. The wind turbine generator set according to claim 6, characterized in that, The heat source assembly is connected to a fluid drive component and a primary regulating valve.

8. The wind turbine generator set according to claim 6, characterized in that, The fan blades are multiple, and the de-icing pipeline is equipped with a two-stage regulating valve.

9. The wind turbine generator set according to claim 6, characterized in that, Also includes: A first temperature measuring element is used to measure the temperature of the blade body; An alarm module is provided, which is used to issue an alarm signal when the temperature measured by the first temperature measuring element is abnormal.

10. The wind turbine generator set according to claim 9, characterized in that, An icing sensor is installed on the blade body, and the icing sensor is used to monitor the thickness of the ice layer on the blade body.

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