Anti-icing wind wheel of wind driven generator

Abstract

The utility model provides an anti-icing wind wheel of a wind driven generator, and relates to the technical field of wind power generation. The wind wheel comprises a plurality of blades and a hub, wherein mounting cavities and flow guide channels are formed in the blades, super-hydrophobic coatings are arranged on the surfaces of the blades, and the hub is used for connecting a main shaft of the wind driven generator and the blades. The warm flow assemblies are composed of an oil storage tank, an electric heater, an oil pump, a first oil pipe and a second oil pipe which are arranged in the installation cavity, and a liquid outlet of the oil storage tank, the oil pump, the first oil pipe, the flow guide channel, the second oil pipe and a liquid return opening of the oil storage tank are sequentially communicated to form a closed circulation flow channel. In addition, a rotating part of the electric slip ring is simultaneously connected with an electric heater and an oil pump of the warm flow assembly, and a fixed part is connected with a power output end of the wind driven generator. In the application, the warm flow assembly and the super-hydrophobic coating are ingeniously matched, so that the probability of icing on the surface of the blade is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power generation, and more specifically, to an anti-icing wind wheel of a wind turbine generator. Background Art

[0002] A wind turbine generator is a device that relies on the kinetic energy of flowing air captured by the wind turbine blades to first convert wind energy into mechanical energy and then into electrical energy. It has many significant advantages. On the one hand, as a renewable and clean energy acquisition method, wind energy will not be exhausted, and the power generation process is pollution-free. On the other hand, technological development has led to a continuous reduction in its cost, enhanced economic competitiveness, reduced dependence on imported energy, ensured the security and stability of energy supply. Moreover, wind energy resources are widely distributed, suitable for development in many regions. At the same time, the construction period of wind turbine generators is relatively short, and they can be put into use relatively quickly.

[0003] In winter in cold regions, wind turbine generators often encounter extremely low temperatures and high humidity weather. Supercooled water droplets continuously impact the blades, causing the blades to be extremely prone to icing. The icing of the blades will have the following impacts on the wind turbine generator:

[0004] First, the icing on the blade surface will increase the weight of the blade and the resistance, change the aerodynamic shape of the blade, and then reduce the rotational speed of the blade and the ability to capture wind energy, resulting in a significant decrease in the power generation efficiency of the wind turbine generator.

[0005] Second, icing may cause blade imbalance, increase the vibration and mechanical stress of the unit, which will accelerate the wear and fatigue of components, and may even cause serious safety accidents such as blade fracture and tower barrel collapse.

[0006] Third, the long-term icing and melting cycle will damage the surface coating of the blade, accelerate the aging and corrosion of the blade material, increase the frequency of blade repair and replacement, thus increasing the operation and maintenance costs.

[0007] In view of the many serious impacts brought by the icing blades to the wind turbine generator, it is extremely urgent to solve the blade de-icing problem, which is of great significance for ensuring the normal operation of the wind turbine generator, improving the power generation efficiency, reducing safety risks, and controlling operation costs. Summary of the Utility Model

[0008] The purpose of the utility model is to provide an anti-icing wind wheel of a wind turbine generator, aiming to solve the technical problems in the above background art.

[0009] The technical solution of the utility model is realized as follows:

[0010] The technical solution of this application provides an anti-icing wind wheel of a wind turbine generator, including:

[0011] A blade, with an installation cavity and a diversion channel arranged inside, and a superhydrophobic coating arranged on the surface;

[0012] Wherein, the number of the above-mentioned blades is multiple;

[0013] A hub, used for connecting the main shaft of the above-mentioned wind turbine and any one of the above-mentioned blades;

[0014] A warm current assembly, the number of which is equal to the number of the above-mentioned blades, and they are respectively matched with multiple above-mentioned blades one by one;

[0015] Wherein, the above-mentioned warm current assembly includes an oil storage tank, an electric heater, an oil pump, a first oil pipe and a second oil pipe. The above-mentioned oil storage tank, the above-mentioned electric heater, the above-mentioned oil pump, the above-mentioned first oil pipe and the above-mentioned second oil pipe are all arranged in the above-mentioned installation cavity. The above-mentioned electric heater is used for heating the above-mentioned oil storage tank. The above-mentioned oil storage tank is provided with a liquid outlet and a liquid return port. The liquid outlet of the above-mentioned oil storage tank, the above-mentioned oil pump, the above-mentioned first oil pipe, the above-mentioned diversion channel, the above-mentioned second oil pipe and the liquid return port of the above-mentioned oil storage tank are sequentially communicated to form a closed circulation flow channel; and

[0016] An electric slip ring, including a rotating part and a fixed part that cooperate with each other. The above-mentioned rotating part is electrically connected to the electric heater of any one of the above-mentioned warm current assemblies and the oil pump of any one of the above-mentioned warm current assemblies at the same time. The above-mentioned fixed part is used for electrically connecting to the power output end of the above-mentioned wind turbine.

[0017] A further technical solution is that the above-mentioned electric heater is a heating wire, and the above-mentioned heating wire is in a spiral shape;

[0018] Wherein, the above-mentioned oil storage tank is arranged inside the above-mentioned heating wire.

[0019] A further technical solution is that the number of the above-mentioned blades is three, and the three above-mentioned blades are evenly spaced and arranged along the circumferential direction of the outer ring surface of the above-mentioned hub.

[0020] A further technical solution is that the above-mentioned hub includes an annular connecting piece and a protective shell. Any one of the above-mentioned blades is arranged on the outer ring surface of the above-mentioned annular connecting piece. The above-mentioned protective shell covers one end of the above-mentioned annular connecting piece and encloses an installation space with the above-mentioned annular connecting piece;

[0021] Wherein, the above-mentioned electric slip ring is arranged in the above-mentioned installation space.

[0022] A further technical solution is that any one of the above-mentioned blades and the above-mentioned hub are connected by a flange bolt structure.

[0023] A further technical solution is that the above-mentioned installation cavity is provided with a heat preservation layer for heat preservation of the above-mentioned oil storage tank.

[0024] A further technical solution is that the above-mentioned oil storage tank is provided with a temperature sensor for monitoring the temperature of the heat-conducting oil inside the above-mentioned oil storage tank.

[0025] A further technical solution is that the diversion channel is zigzag, and the first oil pipe and the second oil pipe are respectively connected to both ends of the diversion channel.

[0026] A further technical solution is that the fixing component and the power output end of the wind turbine are connected through an electric switch.

[0027] Compared with the prior art, the technical solution of the present utility model has at least the following advantages or beneficial effects:

[0028] When the anti-icing wind wheel applied for is put into use in an environment prone to icing, it has significant advantages. On the one hand, the power output end of the wind turbine will supply power to any warm current component through an electric slip ring. At this time, the electric heater will heat the heat-conducting oil in the oil storage tank. After the heating is completed, the heat-conducting oil will continuously flow in the circulation channel jointly formed by the oil storage tank, the oil pump, the first oil pipe, the diversion channel and the second oil pipe under the action of the oil pump. In this process, the diversion channel can effectively heat the blades, so as to achieve the purpose of preventing the blades from icing on the surface.

[0029] On the other hand, since a super-hydrophobic coating is provided on the surface of the blade, this greatly reduces the adhesion and condensation of moisture on the surface of the blade. Especially in a cold and humid environment, this design can significantly reduce the possibility of the blade icing, and helps to keep the normal operation and performance of the blade unaffected. In this application, it is precisely based on the ingenious cooperative design of the warm current component and the super-hydrophobic coating that the probability of icing on the surface of the blade is greatly reduced, providing a strong guarantee for the stable operation of the wind wheel in a harsh environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 It is a schematic structural diagram of an anti-icing wind wheel of a wind turbine according to an embodiment of the present utility model;

[0032] Figure 2 It is an exploded view of an anti-icing wind wheel of a wind turbine according to an embodiment of the present utility model;

[0033] Figure 3 It is a top view of an anti-icing wind wheel of a wind turbine according to an embodiment of the present utility model;

[0034] Figure 4 is Figure 3 a sectional view taken along the A-A direction in

[0035] Figure 5 is Figure 4 a partially enlarged view of B in

[0036] Figure 6 a partial schematic view of the blade in an embodiment of the present utility model Figure 1 ;

[0037] Figure 7 a partial schematic view of the blade in an embodiment of the present utility model Figure 2 ;

[0038] Figure 8 is a schematic structural view of the warm current assembly in an embodiment of the present utility model.

[0039] Icon: 100 - hub, 110 - annular connecting piece, 120 - protective shell, 200 - blade, 300 - main shaft, 400 - installation cavity, 500 - thermal insulation layer, 600 - warm current assembly, 610 - heating wire, 620 - first oil pipe, 630 - second oil pipe, 640 - oil pump, 650 - oil storage tank, 700 - superhydrophobic coating, 800 - diversion channel, 900 - temperature sensor, 1000 - electric slip ring. Detailed implementation manners

[0040] Embodiment 1

[0041] Please refer to Fig. 1 - Figure 8 , an embodiment of the present application provides an anti - icing wind wheel of a wind turbine, which includes a hub 100 adapted to match the main shaft 300 of the wind turbine. Three blades 200 are arranged on the outer ring surface of the hub 100, and these blades 200 are evenly spaced along the circumferential direction of the hub 100. For any one blade 200, a warm current assembly 600 is configured, and the warm current assembly 600 is composed of an oil storage tank 650, an electric heater, an oil pump 640, a first oil pipe 620 and a second oil pipe 630.

[0042] Among them, for any one blade 200, an independent installation cavity 400 and a diversion channel 800 are arranged inside it, and a superhydrophobic coating 700 is arranged on the surface of the blade 200. Due to the arrangement of the superhydrophobic coating 700 on the surface of the blade 200, the adhesion and condensation of moisture on the surface of the blade 200 are greatly reduced. Especially in a cold and humid environment, this design can significantly reduce the possibility of the blade 200 icing, which is beneficial to maintaining the normal operation and performance of the blade 200 without being affected.

[0043] Further, for any set of blades 200 and the matching structure of the warm flow assembly 600, the above-mentioned oil storage tank 650, the electric heater, the oil pump 640, the first oil pipe 620 and the second oil pipe 630 are all arranged in the installation cavity 400. The electric heater is used to heat the oil storage tank 650, and the oil storage tank 650 is provided with a liquid outlet and a liquid return port. The liquid outlet of the oil storage tank 650, the oil pump 640, the first oil pipe 620, the guide channel 800, the second oil pipe 630 and the liquid return port of the oil storage tank 650 are connected in sequence, thereby forming a closed circulation channel.

[0044] Among them, the anti-icing wind wheel also includes an electric slip ring 1000, and the electric slip ring 1000 includes a rotating part and a fixed part that cooperate with each other. The rotating part is electrically connected to the electric heaters of the three warm current components 600 and the oil pumps 640 of the three warm current components 600 at the same time, and the fixed part is used to electrically connect the power output end of the wind turbine. The power output end of the wind turbine will supply power to any warm current component 600 through the electric slip ring 1000. At this time, the electric heater will heat the heat transfer oil in the oil storage tank 650. After the heating is completed, the heat transfer oil will continue to flow in the circulation channel composed of the oil storage tank 650, the oil pump 640, the first oil pipe 620, the guide channel 800 and the second oil pipe 630. In this process, the guide channel 800 can effectively heat the blade 200, thereby preventing the surface of the blade 200 from icing.

[0045] In the present application, the ingenious coordinated design of the warm current component 600 and the super-hydrophobic coating 700 significantly reduces the probability of ice formation on the surface of the blade 200, providing a strong guarantee for the stable operation of the wind wheel in harsh environments.

[0046] Furthermore, the design of the super hydrophobic coating 700 on the surface of the blade 200 also has the following effects:

[0047] First, it can make the water droplets roll off easily, and at the same time take away impurities such as dust and dirt on the surface of the blade 200, keep the surface of the blade 200 clean, and reduce the impact of dirt on the performance of the blade 200.

[0048] Second, the friction resistance between the wind and the surface of the blade 200 is reduced, the utilization efficiency of wind energy is improved, and the output power of the wind turbine is increased.

[0049] Third, it prevents water and other corrosive substances from staying and penetrating on the surface of the blade 200 for a long time, thereby slowing down the corrosion process of the blade 200 and extending the service life of the blade 200.

[0050] It should be noted that the electrical slip ring 1000 is mainly composed of the following parts: a rotating component (rotor), which is usually connected to a device component that needs to rotate, such as the wind turbine blade 200, and is generally composed of metal rings for conducting current and signals; a fixed component (stator), which is connected to a fixed device structure and includes brushes or contact pieces that contact the rotating part; the brushes (or contact pieces) are made of conductive materials such as carbon brushes or metal contact pieces and are in close contact with the conductive rings of the rotating part to achieve current and signal transmission; insulating materials are used to isolate different conductive paths to prevent short circuits and signal interference; the housing can protect the internal structure, play a role in dust prevention, waterproofing, etc., and ensure the normal operation of the electrical slip ring 1000 in a harsh environment. The electrical slip ring 1000 is an existing device and will not be described in detail here.

[0051] Embodiment 2

[0052] Please refer to Figure 6- Figure 8 , this embodiment is the same as Embodiment 1 in the main body, and the main difference is that: the above-mentioned electric heater is a heating wire 610, the above-mentioned heating wire 610 is in a spiral shape, and the above-mentioned oil storage tank 650 is arranged inside the above-mentioned heating wire 610.

[0053] In the above embodiment, the heating wire 610 wraps the oil storage tank 650, so that the oil storage tank 650 can be evenly heated from all directions, thereby efficiently realizing the rapid heating of the heat-conducting oil in the oil storage tank 650. It is particularly worth mentioning that the heating wire 610 is distributed in a spiral shape, and this design greatly increases the coverage area of the heating wire 610 outside the oil storage tank 650. Thus, the heating rate of the heat-conducting oil in the oil storage tank 650 is further significantly improved, and the working efficiency and performance of the entire system are effectively improved.

[0054] Optionally, the heat-conducting oil in the oil storage tank 650 can be synthetic heat-conducting oil, mineral heat-conducting oil or silicone oil.

[0055] Embodiment 3:

[0056] Please refer to Figure 1 and Figure 2 , this embodiment is the same as Embodiment 1 in the main body, and the main difference is that: the above-mentioned hub 100 includes an annular connecting member 110 and a protective shell 120, any one of the above-mentioned blades 200 is arranged on the outer ring surface of the above-mentioned annular connecting member 110, and the above-mentioned protective shell 120 covers one end of the above-mentioned annular connecting member 110 and encloses an installation space with the above-mentioned annular connecting member 110;

[0057] Among them, the above-mentioned electrical slip ring 1000 is arranged in the above-mentioned installation space.

[0058] In the above embodiments, the protective cover plays a crucial role. It provides a good sealing effect on the ports of the annular connecting member 110. On the one hand, it effectively protects the electric slip ring 1000 from external factors (such as rain); on the other hand, it successfully blocks the intrusion of external dust into the interior of the wind turbine through the annular connecting member 110, effectively ensuring the normal and stable operation of the wind turbine.

[0059] In some embodiments of the present utility model, any one of the above-mentioned blades 200 and the above-mentioned hub 100 are connected by a flange bolt structure.

[0060] In the above embodiments, the flange bolt structure can achieve the rapid installation or disassembly of the blade 200 and the hub 100.

[0061] Embodiment 4

[0062] Please refer to FIG. 6 and Figure 7 , this embodiment is the same as Embodiment 1 in terms of the main body, and the main difference is that the above-mentioned installation cavity 400 is provided with a heat insulation layer 500 for heat insulation of the above-mentioned oil storage tank 650.

[0063] In the above embodiments, the heat insulation layer 500 can provide a heat insulation effect for the oil storage tank 650, effectively reducing the heat dissipation inside the oil storage tank 650, and at the same time avoiding the influence of external low temperature on the temperature inside the oil storage tank 650. In addition, when the oil storage tank 650 needs to be reheated again, the required energy is relatively less, thereby saving the power consumption.

[0064] Embodiment 5

[0065] Please refer to Figure 5 , this embodiment is the same as Embodiment 1 in terms of the main body, and the main difference is that the above-mentioned oil storage tank 650 is provided with a temperature sensor 900 for monitoring the temperature of the heat transfer oil inside the above-mentioned oil storage tank 650.

[0066] In the above embodiments, the temperature sensor 900 has the function of monitoring the temperature of the heat transfer oil inside the oil storage tank 650, so as to facilitate heating the temperature of the heat transfer oil to an appropriate value.

[0067] Embodiment 6

[0068] Please refer to Figure 8 , this embodiment is the same as Embodiment 1 in terms of the main body, and the main difference is that the above-mentioned diversion channel 800 is zigzag, and the above-mentioned first oil pipe 620 and the above-mentioned second oil pipe 630 are respectively connected to both ends of the above-mentioned diversion channel 800.

[0069] In the above embodiment, the diversion channel 800 is in a zigzag shape. This design increases the flow path of the heat-conducting oil, expands the contact area between the heat-conducting oil and the blade 200, and thus makes the heating effect of the blade 200 more excellent. In addition, the above-mentioned first oil pipe 620 and second oil pipe 630 are respectively connected to both ends of the diversion channel 800 to ensure that the heat-conducting oil can completely flow through the heat-conducting channel.

[0070] Embodiment 7 This embodiment is the same as the main body of Embodiment 1, and the main difference is that the above-mentioned fixing component and the power output end of the above-mentioned wind turbine are connected through an electric switch.

[0071] In the above embodiment, the design of the electric switch can effectively control the on and off of the power supply of the electric heater and the oil pump 640, so that the warm current assembly 600 is only turned on when it is needed to be used.

[0072] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An anti-icing wind turbine rotor, characterized in that, Comprising: A blade (200) having an installation cavity (400) and a diversion channel (800) provided therein, and a superhydrophobic coating (700) provided on the surface; Wherein, the number of the blades (200) is multiple; A hub (100) for connecting the main shaft (300) of the wind turbine and any one of the blades (200); A warm current assembly (600), the number of which is equal to the number of the blades (200), and which are respectively and one-to-one matched with the multiple blades (200); Wherein, the warm current assembly (600) includes an oil storage tank (650), an electric heater, an oil pump (640), a first oil pipe (620) and a second oil pipe (630). The oil storage tank (650), the electric heater, the oil pump (640), the first oil pipe (620) and the second oil pipe (630) are all provided in the installation cavity (400). The electric heater is used for heating the oil storage tank (650). The oil storage tank (650) is provided with a liquid outlet and a liquid return port. The liquid outlet of the oil storage tank (650), the oil pump (640), the first oil pipe (620), the diversion channel (800), the second oil pipe (630) and the liquid return port of the oil storage tank are sequentially communicated to form a closed circulation flow path; and An electric slip ring (1000) including a rotating part and a fixed part that cooperate with each other. The rotating part is electrically connected to the electric heater of any one of the warm current assemblies (600) and the oil pump (640) of any one of the warm current assemblies (600), and the fixed part is used for electrically connecting to the power output end of the wind turbine.

2. The anti-icing wind wheel of a wind turbine according to claim 1, characterized in that, The electric heater is a heating wire (610), and the heating wire (610) is in a spiral shape; Wherein, the oil storage tank (650) is provided inside the heating wire (610).

3. The anti-icing wind wheel of a wind turbine according to claim 1, characterized in that, The number of the blades (200) is three, and the three blades (200) are evenly spaced along the circumferential direction of the outer ring surface of the hub (100).

4. The anti-icing wind wheel of a wind turbine according to claim 1, characterized in that, The hub (100) includes an annular connecting member (110) and a protective shell (120). Any one of the blades (200) is provided on the outer ring surface of the annular connecting member (110). The protective shell (120) covers one end of the annular connecting member (110) and encloses an installation space with the annular connecting member (110); Wherein, the electric slip ring (1000) is provided in the installation space.

5. The anti-icing wind wheel of a wind turbine according to claim 4, characterized in that, Any one of the blades (200) and the hub (100) are connected by a flange bolt structure.

6. The anti-icing wind wheel of a wind turbine according to claim 1, characterized in that, The installation cavity (400) is provided with a heat preservation layer (500) for heat preservation of the oil storage tank (650).

7. The anti-icing wind wheel of a wind turbine according to claim 1, wherein, The oil storage tank (650) is provided with a temperature sensor (900) for monitoring the temperature of the heat transfer oil inside the oil storage tank (650).

8. The anti-icing wind wheel of a wind turbine according to claim 1, characterized in that, The diversion channel (800) is in a broken line shape, and the first oil pipe (620) and the second oil pipe (630) are respectively communicated with both ends of the diversion channel (800).

9. The anti-icing wind wheel of a wind turbine according to claim 1, characterized in that, The fixed part and the power output end of the wind turbine are connected through an electric switch.

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