Blade de-icing device, wind turbine generator, and blade de-icing method

Abstract

The embodiment of the present application provides a kind of blade deicing device, wind turbine generator unit and blade deicing method.Therein, blade deicing device includes: heat transfer cavity, heat transfer cavity is enclosed by rotating part and stationary part, rotating part is used to rotate with impeller, stationary part is used to keep stationary relative to the stator or fixed shaft of generator;First heat supply pipeline, the first end of first heat supply pipeline is communicated with heat transfer cavity through stationary part, the second end of first heat supply pipeline is used to communicate heat source;Second heat supply pipeline, the first end of second heat supply pipeline is communicated with heat transfer cavity through rotating part, the second end of second heat supply pipeline is used to communicate with the inner cavity of the blade of impeller.The blade deicing device proposed in the embodiment of the present application is high in reliability, reduces the self-consumption of fan, and greatly improves the stability and reliability of heat medium delivery provided by heat source, guarantees blade deicing effect, so as to guarantee the service life of wind turbine generator unit.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind power generation, in particular to a blade deicing device, a wind turbine generator and a blade deicing method. BACKGROUND

[0002] With the development of wind power technology, the installed range of wind turbine generators is also increasingly widespread. However, in extremely cold regions or regions where freezing rain may occur, the blades of the wind turbine generator are prone to icing, resulting in shutdown. At present, in order to deice the blades, a hot air blower is usually arranged in the impeller to blow hot air into the blades. However, arranging the hot air blower in the impeller will greatly increase the self-consumption power of the fan, and on the other hand, due to the synchronous rotation of the impeller and the blade, the hot air blower will be subjected to additional centrifugal force, reducing the reliability of the hot air blower in operation. SUMMARY

[0003] The present application aims to at least solve one of the problems in the prior art or related art.

[0004] To this end, the present application provides a blade deicing device, a wind turbine generator and a blade deicing method, which can heat and deice the blades and have high reliability.

[0005] To achieve the above-mentioned purpose, the first aspect of the present application provides a blade deicing device for installation in a wind turbine generator, the wind turbine generator comprising an impeller and a generator, the blade deicing device comprising: a heat transfer cavity, the heat transfer cavity being enclosed by a rotating part and a stationary part, the rotating part being configured to rotate with the impeller, and the stationary part being configured to remain stationary relative to the stator or the fixed shaft of the generator; a first heat supply pipeline, a first end of the first heat supply pipeline being in communication with the heat transfer cavity through the stationary part, and a second end of the first heat supply pipeline being configured to communicate with a heat source; and a second heat supply pipeline, a first end of the second heat supply pipeline being in communication with the heat transfer cavity through the rotating part, and a second end of the second heat supply pipeline being configured to communicate with an inner cavity of a blade of the impeller.

[0006] Optionally, the rotating part is an annular rotating cover, the stationary part is an annular stationary cover, and the rotating part and the stationary part form the heat transfer cavity after being connected, and the heat transfer cavity has an annular inner cavity.

[0007] Optionally, a portion of the rotating part and a portion of the stationary part overlap at the connection.

[0008] Optionally, the width of the overlap of the rotating part and the stationary part at the connection is greater than or equal to 50 mm.

[0009] Optionally, the rotating part and the stationary part have a gap at the connection, and the width of the gap is less than or equal to 5 mm.

[0010] Optionally, a sealing member is arranged at the connection of the rotating part and the stationary part, and the sealing member is a brush or a sealing ring.

[0011] Optionally, the number of the first heat supply pipes is at least two, and the at least two first heat supply pipes are distributed equidistantly around the central axis of the heat transfer cavity.

[0012] The second aspect of the present application provides a wind turbine generator, comprising: a generator; a rotor, the rotor comprising a hub and a plurality of blades connected to the hub; and the blade deicing device according to any one of the above technical solutions, a second end of the second heat supply pipe being in communication with the internal cavity of the plurality of blades.

[0013] Optionally, the number of the second heat supply pipes is a plurality, and each of the plurality of blades is in communication with one of the second heat supply pipes.

[0014] Optionally, the wind turbine generator further comprises a nacelle; the second end of the first heat supply pipe is in communication with the inside of the nacelle, for introducing the hot air in the nacelle into the heat transfer cavity, and / or the second end of the first heat supply pipe is in communication with the heat dissipation outlet of the generator, for introducing the hot air discharged from the generator into the heat transfer cavity, and / or the blade deicing device further comprises a hot air blower, which is arranged in the nacelle, and the second end of the first heat supply pipe is in communication with the air outlet of the hot air blower.

[0015] Optionally, the generator further comprises: a shafting, the shafting comprising a fixed shaft and a movable shaft, the movable shaft being connected to the hub; a rotating part being connected to one end of the movable shaft close to the rotor, and a stationary part being connected to one end of the fixed shaft close to the rotor.

[0016] Optionally, the movable shaft is sleeved on the outside of the fixed shaft, and the first end of the first heat supply pipe extends into the internal cavity of the fixed shaft and is connected to the stationary part.

[0017] Optionally, the rotating part is bolted or bonded to the movable shaft, and the rotating part is a plastic rotating part or a nylon rotating part. The stationary part is bolted or bonded to the fixed shaft, and the stationary part is a plastic stationary part or a nylon stationary part.

[0018] Optionally, a part of the shafting extends into the inside of the hub, so that the heat transfer cavity is located inside the hub, and the second heat supply pipe is arranged in the rotor.

[0019] The third aspect of the present application provides a blade deicing method, comprising the following steps: conveying a heat medium into a heat transfer cavity through a first heat supply pipe, wherein the heat transfer cavity is enclosed by a rotating part and a stationary part, the rotating part can rotate together with the blade, the stationary part remains stationary, and the first heat supply pipe is connected to the stationary part; conveying the heat medium in the heat transfer cavity into the internal cavity of the blade through a second heat supply pipe, and the second heat supply pipe is connected to the rotating part.

[0020] Optionally, waste heat from the engine room can be transferred to the heat transfer chamber via the first heating pipe; and / or waste heat from the generator can be transferred to the heat transfer chamber via the first heating pipe; and / or heat generated by the hot air blower can be transferred to the heat transfer chamber via the first heating pipe.

[0021] The blade de-icing device proposed in this application can effectively de-ic the blades, preventing icing from affecting the operation of the wind turbine generator set, reducing the self-power consumption of the wind turbine, and ensuring high reliability. Specifically, the heat transfer chamber is enclosed by a rotating component that can rotate synchronously with the impeller and a stationary component that remains stationary relative to the stator or fixed shaft of the generator. This allows the second heating pipe, blades, and rotating component to rotate synchronously while remaining relatively stationary. The first heating pipe is connected to the stationary component, which facilitates the connection of the first heating pipe to the stationary heat source. This helps the heat source remain stationary relative to the stator and be stably installed within the wind turbine generator set. Furthermore, it solves the problem of difficulty in providing heat medium from a stationary heat source to the rotating blades. The heat source does not need to be subjected to additional centrifugal force as it rotates with the impeller, resulting in high reliability, reduced self-power consumption of the wind turbine, and significantly improved stability and reliability of the heat medium delivery from the heat source. This ensures effective blade de-icing and thus extends the service life of the wind turbine generator set.

[0022] The wind turbine generator provided in this application has the blade de-icing device of the above-mentioned technical solution, and thus has the technical effects of the blade de-icing device, which will not be described in detail here.

[0023] The blade de-icing method provided in this application has similar technical effects to the blade de-icing device described above, and will not be repeated here. Attached Figure Description

[0024] The above and other objects and features of this application will become clearer from the following description of embodiments of this application taken in conjunction with the accompanying drawings, wherein:

[0025] Figure 1 A partial structural schematic diagram of a wind turbine generator set according to an embodiment of this application is shown;

[0026] Figure 2 A cross-sectional schematic diagram of the shaft system of a wind turbine generator set according to an embodiment of this application is shown;

[0027] Figure 3 Another partial cross-sectional schematic view of the shaft system of a wind turbine generator set according to an embodiment of this application is shown;

[0028] Figure 4 Another partial cross-sectional schematic view of the shaft system of a wind turbine generator set according to an embodiment of this application is shown;

[0029] Figure 5A partial cross-sectional schematic diagram of a wind turbine generator set according to an embodiment of this application is shown;

[0030] Figure 6 Another partial cross-sectional schematic diagram of a wind turbine generator set according to one embodiment of this application is shown;

[0031] Figure 7 Another partial cross-sectional schematic diagram of a wind turbine generator set according to an embodiment of this application is shown;

[0032] Figure 8 It shows Figure 7 A magnified view of a portion of point J in the middle;

[0033] Figure 9 Another partial structural schematic diagram of a wind turbine generator set according to one embodiment of this application is shown;

[0034] Figure 10 A partial structural schematic diagram of a wind turbine generator set according to an embodiment of this application is shown.

[0035] Explanation of icon numbers:

[0036] 110 Heat transfer chamber, 111 Rotating component, 112 Stationary component, 120 First heating pipe, 130 Second heating pipe, 140 Impeller, 150 Shaft system, 151 Fixed shaft, 152 Moving shaft, 153 Bearing. Detailed Implementation

[0037] Below, we will refer to Figures 1 to 10 This application will specifically describe some embodiments of the blade de-icing device, wind turbine generator set, and blade de-icing method.

[0038] However, this application may be exemplified in many different forms and should not be construed as limited to the specific embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of this application to those skilled in the art.

[0039] Currently, most methods for de-icing wind turbine blades involve pre-embedding heating strips within the blades. However, since the heating strips are electrical components, they are highly susceptible to lightning strikes during wind turbine operation, affecting the turbine's application range. Another related technology uses a hot air blower installed inside the impeller to blow hot air into the blades. However, installing a hot air blower inside the impeller significantly increases the turbine's self-power consumption. Furthermore, because the impeller and blades rotate synchronously, the hot air blower is subjected to additional centrifugal force, reducing its operational reliability. Therefore, current blade de-icing methods are not ideal and have poor reliability.

[0040] Therefore, based on the above-mentioned problems, the first aspect of this application provides a blade de-icing device for wind turbine generator sets. Figures 1 to 5 Partial structures of a wind turbine generator set according to one embodiment of this application are shown. For example... Figures 1 to 5 As shown, the blade de-icing device includes a heat transfer chamber 110, a second heat supply pipe 130, and a first heat supply pipe 120. The heat transfer chamber 110 is enclosed by a rotating member 111 and a stationary member 112. The rotating member 111 can be mounted on the impeller 140 of the wind turbine generator set, or on the moving shaft 152 of the generator's central shaft system 150 (see...). Figures 6 to 8 ), used to rotate synchronously with the rotor of the wind turbine generator set, and the stationary part 112 can be mounted on the fixed axis of the wind turbine generator set's shaft system (see Figure 6 and Figure 8 The heat transfer chamber 10 can also be installed in other locations to remain stationary relative to the nacelle of the wind turbine generator, meaning that a portion of the chamber wall rotates while the other portion remains stationary. The first end of the first heating pipe 120 is connected to the heat transfer chamber 110 via a stationary element 112, and the second end of the first heating pipe 120 is connected to a heat source. The first end of the second heating pipe 130 is connected to the heat transfer chamber 110 via a rotating element 111, and the second end of the second heating pipe 130 is connected to the inner cavity of the impeller blades (not shown in the figure). The heat medium provided by the heat source can enter the inner cavity of the blades for de-icing via the first heating pipe 120, the heat transfer chamber 110, and the second heating pipe 130.

[0041] Because the heat transfer chamber 110 is enclosed by a rotating component 111 that rotates synchronously with the impeller 140 and a stationary component 112 that remains stationary relative to the stator or fixed shaft of the generator, the second heating pipe 130, the blades, and the rotating component 111 can rotate synchronously while remaining relatively stationary. This allows the first heating pipe 120 to connect to the stationary component 112, facilitating the connection of the first heating pipe 120 to the stationary heat source. This, in turn, helps the heat source remain stationary relative to the nacelle and be stably installed within the wind turbine generator set. This solves the problem of difficult heat transfer from a stationary heat source to rotating blades. Compared to existing technologies where the heat source is subjected to additional centrifugal force as the impeller 140 rotates, this method offers higher reliability and reduces the wind turbine's self-consumption. It significantly improves the stability and reliability of the heat transfer medium provided by the heat source while ensuring effective blade de-icing, thus extending the service life of the wind turbine generator set. It also ensures the wind turbine generator set can be used in extremely cold regions. Furthermore, since there is no need to pre-embed heating strips within the blades for de-icing, the risk of lightning strikes is reduced, ensuring the reliability of the unit's operation.

[0042] Regarding the shapes of the rotating member 111 and the stationary member 112, specifically, as follows: Figure 4 , Figure 6 , Figure 7and Figure 8 As shown, the rotating member 111 is an annular rotating cover, and the stationary member 112 is an annular stationary cover. When the rotating member 111 and the stationary member 112 are joined together, a heat transfer cavity 110 with an annular inner cavity is formed, facilitating the uniform circumferential distribution of heat to multiple blades. As an example, the shapes of the rotating member 111 and the stationary member 112 can each divide the annular cylinder into two halves radially; however, their shapes are not limited to this. Optionally, the rotating member 111 includes at least a portion of the radially outer peripheral wall of the annular cylinder, and the stationary member 112 includes at least a portion of the radially inner peripheral wall of the annular cylinder. For example, the rotating member 111 includes an annular radially outer peripheral wall and an annular first axial end wall, and the stationary member 112 includes an annular radially inner peripheral wall and an annular second axial end wall.

[0043] To ensure effective de-icing, the entire heating channel must be airtight. Specifically, to ensure a tight seal between the rotating component 111 and the stationary component 112, a portion of the rotating component 111 and a portion of the stationary component 112 overlap at their connection point. For example, a portion of the sidewall of the annular rotating shield away from the moving shaft 152 overlaps with the sidewall of the annular stationary shield away from the fixed shaft 151.

[0044] Furthermore, the overlap width at the connection between the rotating member 111 and the stationary member 112 (the overlap width refers to the radial width of the overlapping portion on the moving shaft 152) is greater than or equal to 50 mm. This reduces the possibility of hot gas or other heat media leaking out of the heat transfer chamber 110 through the gap between the annular rotating cover and the annular stationary cover, thereby improving the sealing performance of the heat transfer chamber 110.

[0045] Of course, the annular rotating shield also needs to be able to rotate relative to the annular stationary shield. Therefore, a gap is made at the connection between the rotating component 111 and the stationary component 112 (this gap refers to the gap between the rotating component 111 and the stationary component 112 at the connection along the axial direction of the fixed axis 151). For example, there is a gap between the side wall of the annular rotating shield away from the moving axis 152 and the side wall of the annular stationary shield away from the fixed axis 151 along the axial direction of the moving axis 152, and the width of the gap is less than or equal to 5 mm. This ensures that the annular rotating shield can rotate smoothly while avoiding excessive heat loss due to an excessively large gap between the two components.

[0046] Of course, a sealing element (not shown in the figure), such as a brush or sealing ring, can also be provided between the side wall of the annular rotating cover away from the moving shaft 152 and the side wall of the annular stationary cover away from the fixed shaft 151 to improve the sealing effect between the annular rotating cover and the annular stationary cover.

[0047] Regarding the number of second heating pipes 130, since the impeller 140 has multiple blades, the number of second heating pipes 130 is also multiple. One heating channel can be used to heat one blade, or two or more heating channels can be used to heat the same blade, ensuring that each blade is connected to at least one heating channel.

[0048] The number of first heating pipes 120 can be one or more, for example, two (see...). Figure 9 and Figure 10 As shown), three or more can be designed according to the heat supply requirements. When there are multiple first heating pipes 120, the multiple first heating pipes 120 are further distributed at equal intervals around the central axis of the heat transfer cavity 110, which is conducive to uniformly supplying heat to the heat transfer cavity 110, thereby facilitating uniform heating of multiple blades.

[0049] Additionally, it should be noted that the heat source in this application refers to a source capable of providing heat to the blades, which can contain or generate a heat medium. The second end of the first heating pipe 120 is connected to the heat source, meaning the heat source can provide a heat medium, such as hot air, into the first heating pipe 120 to heat the inner cavity of the blades, thereby de-icing. This can be a hot air blower installed in the nacelle, or an electrical control cabinet in the nacelle, etc., as long as it can provide a heat medium to heat the blades. The heat medium can flow sequentially within the first heating pipe 120, the heat transfer cavity 110, and the second heating pipe 130 to heat the blades.

[0050] The heat source can be located in a fixed position and does not rotate with the blades. For example, the generator of a wind turbine can be used as a heat source, and the waste heat emitted by the generator can be used to heat the blades. In this case, the second end of the first heating pipe 120 is connected to the heat dissipation outlet of the generator, and the hot air that has circulated through the generator to cool it is introduced into the heat transfer chamber 110 through the first heating pipe 120, and then transported to the blade cavity through the second heating pipe 130. By using the generator's own heat to de-ice the blades, energy can be saved and the self-consumption of the wind turbine can be greatly reduced. Alternatively, the heat generated by the components inside the nacelle (such as the electrical cabinet) can be used as a heat source, and the waste heat emitted can be used to heat the blades. In this case, the second end of the first heating pipe 120 needs to be extended into the nacelle to introduce the hot air from the nacelle into the blade cavity.

[0051] Of course, a dedicated heating section can also be set up to provide heat. For example, a hot air blower can be used as the heat source, and the hot air blown out by the hot air blower can be used as the heat medium. Moreover, to avoid the hot air blower being affected by additional centrifugal force, the hot air blower can be installed inside the fixed nacelle, with the second end of the first heating pipe 120 connected to the air outlet of the hot air blower. Since the nacelle is a relatively static environment, it is beneficial to improve the heating stability and reliability of the hot air blower.

[0052] Of course, the second heating pipe 130 can also be connected to both the air outlet of the hot air blower and the heat dissipation outlet of the generator, or to the waste heat of the engine room, to improve the de-icing efficiency.

[0053] A second aspect of this application provides a wind turbine generator set, including a generator; and an impeller 140 (see...). Figure 1 , Figure 5 and Figure 7 As shown, the impeller 140 includes a hub and a plurality of blades connected to the hub; and a blade de-icing device as described in any of the above embodiments, wherein the second end of the second heating pipe 130 is connected to the inner cavity of the plurality of blades. The wind turbine generator provided in this application has the blade de-icing device of the above technical solution, and thus has the technical effects of the above blade de-icing device, which will not be described in detail here.

[0054] The impeller 140 includes a hub and multiple blades connected to the hub. The multiple blades can drive the hub to rotate synchronously under the action of wind.

[0055] In addition to the stator, stator shaft, and rotor, the generator also includes a shaft system of 150. For example... Figure 2 , Figure 3 and Figure 4 As shown, the shaft system 150 includes a fixed shaft 151 and a movable shaft 152. The movable shaft 152 is sleeved on the outside of the fixed shaft 151. A bearing 153 is provided between the movable shaft 152 and the fixed shaft 151 to facilitate the fixed shaft 151 in supporting the movable shaft 152. Figure 2 and Figure 6 The structure of shaft system 150 is shown. One end of the moving shaft 152 is connected to the hub, so that multiple blades can drive the moving shaft 152 to rotate synchronously. The other end of the moving shaft 152 is directly or indirectly connected to the rotor of the generator. The fixed shaft 151 is stationary and is directly or indirectly connected to the stator or fixed shaft of the generator, thereby enabling the blades to drive the generator to generate electricity under the action of wind.

[0056] To ensure that the rotating component 111 can rotate synchronously with multiple blades, the rotating component 111 can be mounted on the moving shaft 152 of the shaft system 150 or on the hub, etc. To ensure that the stationary component 112 can remain stationary relative to the fixed shaft 151, the stationary component 112 can be mounted on the fixed shaft 151 of the shaft system 150 or on the casing of the fan, etc. Any method that satisfies the above requirements is acceptable. Moreover, the shapes of the rotating component 111 and the stationary component 112 can also be irregular. Except for their mounting and positioning parts, the remaining parts can extend to specific positions to enclose and form a heat transfer cavity 110, thereby not excessively affecting the length of the second heating pipe 130 and the first heating pipe 120, and facilitating the arrangement of each part.

[0057] As an example, such as Figure 5 , Figure 6 and Figure 7 As shown, the rotating component 111 is positioned at the end of the moving shaft 152 near the impeller 140, and the stationary component 112 is positioned at the end of the fixed shaft 151 near the impeller 140. Since the impeller 140 is closer to the multiple blades relative to the shaft system 150, the heat transfer chamber 110 is positioned closer to the multiple blades, reducing the length of the second heating pipe 130 that rotates synchronously with the multiple blades, reducing the weight of the rotating parts, and thus reducing the fan's self-consumption. Furthermore, positioning the rotating component 111 and the stationary component 112 on the moving shaft 152 and the fixed shaft 151 respectively ensures that the rotating component 111 rotates synchronously with the multiple blades while the stationary component 112 remains stationary relative to the fixed shaft 151. Additionally, the rotating component 111 and the stationary component 112 can be combined at the end of the shaft system 150 to form the heat transfer chamber 110, simplifying the structure of the rotating component 111 and the stationary component 112.

[0058] Specifically, the rotating component 111 and the stationary component 112 are connected by bolts or adhesive to the moving shaft 152, and the stationary component 112 is connected by bolts or adhesive to the fixed shaft 151. This connection is convenient and quick. Furthermore, by making the stationary component 112 a plastic or nylon component, and the rotating component 111 a plastic or nylon component, the weight is reduced, and it will not significantly affect the rotational roundness of the moving shaft 152.

[0059] In addition, regarding the location of the heat transfer chamber 110, such as Figure 5 and Figure 6 As shown, a portion of the shaft system 150 is extended into the hub, so that the rotating part 111 and the stationary part 112 located at one end of the shaft system 150 are also located inside the hub, thereby placing the heat transfer chamber 110 inside the hub. This avoids the heat transfer chamber 110 being exposed or having a small external structure, which would cause the internal heat to drop too quickly and affect the de-icing effect.

[0060] Regarding the location of the second heating pipe 130, such as Figure 5and Figure 7 As shown, since the heat transfer chamber 110 is located inside the hub, the second heating pipe 130 can also be located inside the hub. This is beneficial for insulating the second heating pipe 130 and preventing it from being exposed, which would cause the internal heat to drop too quickly and affect the de-icing effect.

[0061] Regarding the location of the first heating pipe 120, such as Figure 5 and Figure 7 As shown, since the movable shaft 152 is sleeved on the outside of the fixed shaft 151, the first heating pipe 120 can extend into the inner cavity of the fixed shaft 151 and connect with the stationary member 112 located at one end of the fixed shaft 151, thereby connecting the heat transfer cavity 110. By surrounding the first heating pipe 120 with the fixed shaft 151, it can avoid the first heating pipe 120 occupying additional external space, and it is also beneficial to insulate the second heating pipe 130, preventing the first heating pipe 120 from being exposed or having a small external structure, which would cause the internal heat to drop too quickly and affect the de-icing effect.

[0062] It should be noted that the blade de-icing device can be fabricated separately and then installed at the corresponding position on the wind turbine generator set before hoisting. This adds a de-icing structure to the already operational wind turbine generator set, enabling heated de-icing of the blades and ensuring the wind turbine generator set's application in extremely cold regions. Alternatively, it can be pre-assembled into the designated position on the wind turbine generator set before hoisting. Adding a blade treatment device improves the blade treatment effect.

[0063] A third aspect of this application provides a blade de-icing method for use with the blade de-icing device provided in the first aspect embodiment or with the wind turbine generator provided in the second aspect embodiment. The blade de-icing method includes the following steps: supplying a heat transfer medium into a heat transfer cavity 110 via a first heating pipe 120, wherein the heat transfer cavity 110 is formed by a rotating member 111 and a stationary member 112, the rotating member 111 being able to rotate with the blade, and the stationary member 112 remaining stationary, the first heating pipe 120 being connected to the stationary member 112; and supplying the heat transfer medium in the heat transfer cavity 110 to the inner cavity of the blade via a second heating pipe 130, the second heating pipe 130 being connected to the rotating member 111. The blade de-icing method provided in this aspect embodiment has similar technical effects to the first aspect embodiment, and therefore will not be described in detail.

[0064] Furthermore, waste heat from the engine compartment is transferred to the heat transfer chamber 110 via the first heating pipe 120, where the heat transfer medium is provided by the heating components inside the engine compartment. Alternatively, waste heat from the generator is transferred to the heat transfer chamber 110 via the first heating pipe 120, where the generator provides the heat transfer medium. Or, hot air generated by a hot air blower is transferred to the heat transfer chamber 110 via the first heating pipe 120, where the hot air blower provides the heat transfer medium.

[0065] The specific embodiments of this application have been described in detail above. Although some embodiments have been shown and described, those skilled in the art should understand that modifications and improvements can be made to these embodiments (e.g., different features described in different embodiments can be combined) without departing from the principles and spirit of this application as defined by the claims and their equivalents. Such modifications and improvements should also be within the protection scope of this application.

Claims

1. A wind turbine generator set, characterized in that, include: dynamo; An impeller (140) includes a hub and a plurality of blades connected to the hub; and The blade de-icing device has a second end of the second heating pipe (130) connected to the inner cavity of the plurality of blades; The blade de-icing device includes a heat transfer chamber (110), a first heat supply pipe (120), and a second heat supply pipe (130). The heat transfer chamber (110) is formed by a rotating part (111) and a stationary part (112). The rotating part (111) rotates together with the impeller, and the stationary part (112) remains stationary relative to the stator or fixed shaft of the generator. The first end of the first heat supply pipe (120) is connected to the heat transfer chamber (110) via the stationary part (112), and the second end of the first heat supply pipe (120) is used to connect to a heat source. The first end of the second heat supply pipe (130) is connected to the heat transfer chamber (110) via the rotating part (111), and the second end of the second heat supply pipe (130) is connected to the inner cavity of the blade of the impeller. The generator also includes a shaft system (150), which includes a fixed shaft (151) and a moving shaft (152). The moving shaft (152) is connected to the hub. The rotating component (111) is connected to the end of the moving shaft (152) near the impeller (140) or to the hub. The stationary component (112) is connected to the end of the fixed shaft (151) near the impeller (140).

2. The wind turbine generator set according to claim 1, characterized in that, The rotating component (111) is an annular rotating cover, and the stationary component (112) is an annular stationary cover. The rotating component (111) and the stationary component (112) are connected to form the heat transfer cavity (110), which has an annular inner cavity.

3. The wind turbine generator set according to claim 1 or 2, characterized in that, A portion of the rotating member (111) and a portion of the stationary member (112) overlap at the connection.

4. The wind turbine generator set according to claim 3, characterized in that, The overlap width between the rotating member (111) and the stationary member (112) at the connection is greater than or equal to 50 mm; and / or The rotating member (111) and the stationary member (112) have a gap at the connection, the width of which is less than or equal to 5 mm; and / or The rotating component (111) and the stationary component (112) are provided with a sealing element at the connection point, which is a brush or a sealing ring.

5. The wind turbine generator set according to claim 1 or 2, characterized in that, The number of the first heating pipes (120) is at least two, and the at least two first heating pipes (120) are distributed at equal intervals around the central axis of the heat transfer cavity (110).

6. The wind turbine generator set according to claim 1, characterized in that, The number of the second heating pipes (130) is multiple, and each of the multiple blades is connected to one of the second heating pipes (130).

7. The wind turbine generator set according to claim 1, characterized in that, The wind turbine generator set also includes a nacelle; The second end of the first heating pipe (120) is connected to the interior of the cabin, for introducing hot air from the cabin into the heat transfer cavity (110), and / or The second end of the first heating pipe (120) is connected to the heat dissipation outlet of the generator, for introducing hot air discharged from the generator into the heat transfer cavity (110), and / or The blade de-icing device also includes a hot air blower, which is installed in the nacelle, and the second end of the first heating pipe (120) is connected to the air outlet of the hot air blower.

8. The wind turbine generator set according to claim 1, characterized in that, The moving shaft (152) is sleeved on the outside of the fixed shaft (151), and the first end of the first heating pipe (120) extends into the inner cavity of the fixed shaft (151) and is connected to the stationary part (112).

9. The wind turbine generator set according to claim 1, characterized in that, The rotating component (111) is bolted or bonded to the moving shaft (152), and the rotating component (111) is a plastic rotating component (111) or a nylon rotating component (111). The stationary component (112) is bolted or bonded to the fixed shaft (151), and the stationary component (112) is a plastic stationary component (112) or a nylon stationary component (112).

10. The wind turbine generator set according to claim 1, characterized in that, A portion of the shaft system (150) extends into the hub so that the heat transfer chamber (110) is located inside the hub, and the second heat supply pipe (130) is disposed inside the impeller (140).

11. A method for de-icing blades, characterized in that, Includes the following steps: A heat medium is supplied to the heat transfer cavity (110) through a first heating pipe (120). The heat transfer cavity (110) is formed by a rotating part (111) and a stationary part (112). The rotating part (111) can rotate together with the blades, and the stationary part (112) remains stationary. The first heating pipe (120) is connected to the stationary part (112). The heat medium in the heat transfer cavity (110) is transported to the inner cavity of the blade through the second heat supply pipe (130), and the second heat supply pipe (130) is connected to the rotating part (111); The rotating component (111) is connected to the end of the moving shaft (152) near the impeller (140), and the stationary component (112) is connected to the end of the fixed shaft (151) near the impeller (140).

12. The blade de-icing method according to claim 11, characterized in that, Waste heat from the cabin is transferred to the heat transfer cavity (110) via the first heating pipe (120); and / or Waste heat from the generator is transferred to the heat transfer chamber (110) via the first heating pipe (120); and / or The heat generated by the hot air blower is transported to the heat transfer cavity (110) through the first heating pipe (120).

Images