Power plant and wind turbine comprising the same

Abstract

The application discloses a power device and a wind driven generator comprising the same. The power device comprises an iron core and a winding, the winding is wound on the iron core, and the power device further comprises a cooling pipe, the cooling pipe is arranged on the winding, at least part of the cooling pipe and the winding are attached to each other, and the part of the cooling pipe attached to the winding extends along the winding direction. The winding, which is the source of heat, is cooled, and the heat generated in the power device can be dissipated in time, so that the power device is prevented from being disabled or damaged due to high temperature. The connection form between the cooling pipe and the winding is adopted, the contact area of the cooling pipe and the winding is increased, the cooling of the power device is maximized and purposeful, the heat dissipation efficiency of the winding is effectively improved, meanwhile, the part of the cooling pipe attached to the winding extends along the winding direction, the volume of the power device is reduced to the maximum, and the compactness and installation convenience of the power device are improved.

Description

Technical Field

[0001] This invention relates to the field of wind turbines, and more particularly to a power unit and a wind turbine including the same. Background Technology

[0002] As the power density of wind turbines continues to increase, existing air-cooling and water-cooling technologies are unable to meet the cooling requirements of wind turbines, resulting in poor cooling effects. The main reason why the cooling needs cannot be guaranteed is that the heat source of wind turbines mainly comes from the coils, while existing air-cooling and water-cooling technologies directly cool the iron core. They indirectly cool the coils through heat conduction from the coils to the iron core. There is a heat-insulating layer between the coils and the iron core, which results in a large temperature difference between the coils and the iron core.

[0003] Therefore, the question of how to improve the cooling efficiency of wind turbines urgently needs to be addressed. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defect of poor cooling effect of wind turbine generators in the prior art, and to provide a power device and a wind turbine generator including the same.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A power unit includes an iron core and a winding, the winding being wound on the iron core.

[0007] The power unit also includes a cooling pipe disposed on the winding, at least a portion of which is in contact with the winding, and the portion of the cooling pipe in contact with the winding extends along the winding direction of the winding.

[0008] Optionally, by extending the cooling pipes along the winding direction and ensuring they are at least partially attached to the windings, the cooling of the power unit primarily targets the heat-generating windings. This allows for more efficient and timely dissipation of heat generated within the power unit, preventing malfunction or damage due to overheating. Furthermore, the unidirectional and close-fitting connection between the cooling pipes and the windings increases the contact area, maximizing and targeting cooling of the power unit and effectively improving the windings' heat dissipation efficiency. Simultaneously, the presence of the cooling pipes avoids obstructing the winding installation space, minimizing the power unit's size and enhancing its compactness and ease of installation. This type of power unit can be applied to various mechanical and electrical equipment, possessing broad application value.

[0009] Preferably, the winding includes a main insulation layer, an inter-turn insulation layer, and a metal conductor.

[0010] The inter-turn insulation layer covers the metal wire, the main insulation layer covers the cooling pipe and the inter-turn insulation layer, and the cooling pipe is disposed between the main insulation layer and the inter-turn insulation layer.

[0011] Optionally, the cooling pipe can be placed between the inter-turn insulation layer and the main insulation layer of the metal conductor to reduce the heat generated by the metal conductor during operation while ensuring insulation, thereby lowering the overall temperature of the winding and improving the heat dissipation efficiency of the winding, thus ensuring the stable and safe operation of the power unit.

[0012] Preferably, there are multiple cooling pipes, which are arranged at intervals along the stacking direction of the coils in the winding. The power unit also includes a distributor, a collector, an inlet pipe, and an outlet pipe.

[0013] The diverter is installed at the inlet end of the plurality of cooling pipes and is connected to the inlet pipe;

[0014] The manifold is installed at the outlet end of the plurality of cooling pipes and is connected to the outlet pipe.

[0015] Optionally, a structure employing multiple cooling pipes to simultaneously cool the windings can increase the heat dissipation area, thereby further improving the direct cooling effect on the windings. Furthermore, by adding flow dividers and junction boxes, unified control of multiple cooling pipes can be achieved, effectively improving the flow efficiency and uniformity of the cooling medium within the cooling pipes, further enhancing the winding's heat dissipation efficiency.

[0016] Preferably, the inlet and outlet of each cooling pipe are located on the same side of the iron core.

[0017] Optionally, this structural form facilitates the installation of external pipelines and also makes it easier for staff to control and manage the cooling pipes, thus improving work efficiency.

[0018] Preferably, the cooling pipe includes a U-shaped structure arranged around both sides of the iron core, sandwiched between two layers of coils in the winding, and the cooling pipe is arranged perpendicular to each other at the bend of the pipe.

[0019] Optionally, this structure of the cooling pipe, sandwiched between two layers of coil, increases the fit and contact area between the cooling pipe and the coil, ensuring uniform cooling when they come into contact, thereby improving the winding's heat dissipation efficiency. Furthermore, this design makes full use of the space within the winding, resulting in a compact overall structure. Simultaneously, the vertical placement of the cooling pipe at bends reduces heat dissipation dead zones, allowing the cooling pipe to be evenly distributed throughout the winding.

[0020] Preferably, there are multiple busbars, which are symmetrically arranged on both sides of the splitter.

[0021] Optionally, by setting multiple manifolds, the outlet sections of different cooling pipes can be converged together, allowing the cooled medium to be discharged quickly after heat exchange. This also facilitates the control and management of the cooling pipes, further improving the heat dissipation efficiency of the windings. Simultaneously, this design increases the redundancy of cooling pipe regulation, ensuring the flow of the cooling medium even if any one manifold fails, thus preventing overall operational accidents caused by single-point failures.

[0022] Preferably, the cooling pipe includes a U-shaped structure at least partially sandwiched between two layers of coils in the winding on the same side of the iron core, and the cooling pipes sandwiched in the winding are arranged sequentially at intervals along the stacking direction perpendicular to the coils in the winding, and the cooling pipes are arranged perpendicular to each other at the pipe bends.

[0023] Optionally, this structural form, by arranging the cooling pipes sequentially at intervals along the stacking direction of the coils in the vertical winding, and setting the cooling pipes perpendicular to each other at the bends of the pipes, can ensure the uniformity and comprehensiveness of cooling medium cooling inside the winding, avoid the generation of heat dissipation dead zones, and thus further improve the heat dissipation effect.

[0024] Preferably, the inlet and outlet of the cooling pipe are both located on the same side of the iron core;

[0025] The cooling pipe includes a U-shaped structure arranged around both sides of the iron core, sandwiched between the winding and the iron core, and the cooling pipe is arranged perpendicular to each other at the pipe bends.

[0026] Optionally, this structural design, by placing both the inlet and outlet of the cooling pipes on the same side of the iron core, simplifies the arrangement of the cooling pipes, reducing their complexity and space occupation. By using cooling pipes arranged in a U-shape around the iron core, not only can the space between the winding and the iron core be fully utilized, but the iron core can also be cooled simultaneously, maximizing the cooling effect. At the same time, it reduces heat dissipation dead zones, ensuring that the cooling pipes can provide comprehensive cooling.

[0027] Preferably, the cooling pipe has multiple flow channels inside, and the multiple flow channels are arranged sequentially at intervals along a radial direction perpendicular to the extension of the cooling pipe;

[0028] The cross-sectional shape of the multiple flow channels is circular or rectangular.

[0029] Optionally, by incorporating multiple flow channels within the cooling pipe and adopting this structural form for all channels, not only can the cooling medium flow uniformly along the entire length of the cooling pipe, achieving more efficient heat dissipation, but the flow area and velocity of the cooling medium can also be increased, promoting heat transfer and dissipation and improving heat dissipation efficiency. Furthermore, by using different cross-sectional shapes for the flow channels, adaptive adjustments can be made according to different cooling media flowing through the cooling pipe, allowing for optimized design based on specific heat dissipation requirements and the characteristics of the cooling medium, further enhancing the hydrodynamic performance of the cooling pipe.

[0030] Preferably, the cooling pipe is made of stainless steel, and a capillary liquid-absorbing core is provided on the inner wall surface of the flow channel.

[0031] Optionally, using stainless steel cooling pipes can improve the heat transfer efficiency and heat dissipation effect. Simultaneously, capillary wicks are provided on the inner wall of the flow channel, which increases the wettability and surface tension of the cooling medium, promoting heat transfer and absorption, and further improving heat transfer efficiency and heat dissipation. The capillary wicks utilize the tiny liquid columns formed by capillary action to guide the fluid into the interior, thereby increasing the internal surface area and improving heat and mass transfer efficiency, demonstrating high practical value.

[0032] Preferably, the cooling material introduced into the cooling pipe is a two-phase working fluid, and the cooling material has electrical insulation properties.

[0033] Optionally, a two-phase working fluid cooling material can be used, which has the advantages of strong heat carrying capacity during phase change process and low gaseous transport resistance, effectively enhancing heat dissipation capacity. The electrical insulation characteristics of the two-phase working fluid can avoid the risk of electrical short circuit caused by leakage when using water cooling method.

[0034] A wind turbine generator, the wind turbine generator comprising the power unit as described in any of the above, wherein the iron core and the windings are used to form a motor stator or a motor rotor.

[0035] Optionally, by placing the aforementioned power unit inside the wind turbine, the cooling efficiency of the wind turbine is improved, ensuring its normal operation and extending its service life. This design has broad application value.

[0036] Preferably, the wind turbine includes a drive motor for driving the motor rotor to rotate, and the inlet and outlet of the cooling pipe are both located on the end of the power unit facing the drive motor.

[0037] Optionally, this setup facilitates the maintenance and adjustment of the cooling pipes by staff, improving operational efficiency.

[0038] The positive and progressive effects of this invention are as follows:

[0039] 1. This power unit, by extending cooling pipes along the winding direction of the windings and ensuring that the cooling pipes are at least partially attached to the windings, cools the windings, the source of heat in the power unit. This allows for more efficient heat dissipation from within the power unit, preventing failure or damage due to high temperatures. Furthermore, the unidirectional and closely fitted connection between the cooling pipes and the windings increases the contact area, maximizing and purposefully cooling the power unit and effectively improving the heat dissipation efficiency of the windings. Simultaneously, the presence of the cooling pipes avoids obstructing the winding installation space, minimizing the size of the power unit and improving its compactness and ease of installation. This power unit can be applied to various mechanical and electrical equipment, possessing broad application value.

[0040] 2. By placing the power unit inside the wind turbine, the cooling efficiency of the wind turbine is improved, ensuring its normal operation and extending its service life. This design has broad application value. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the power unit structure according to Embodiment 1 of the present invention.

[0042] Figure 2 This is a schematic diagram of the cooling pipe structure according to Embodiment 1 of the present invention.

[0043] Figure 3 This is a cross-sectional view of the cooling pipe and winding connection state in Embodiment 1 of the present invention.

[0044] Figure 4 This is a partial structural diagram of the cooling pipe in Embodiment 1 of the present invention.

[0045] Figure 5 This is a schematic diagram showing the connection state of the cooling pipe and winding in Embodiment 2 of the present invention.

[0046] Figure 6 This is a schematic diagram of the cooling pipe structure according to Embodiment 2 of the present invention.

[0047] Figure 7 This is a schematic diagram showing the connection state of the cooling pipe and winding in Embodiment 3 of the present invention.

[0048] Figure 8 This is a schematic diagram of the cooling pipe structure according to Embodiment 3 of the present invention.

[0049] Figure 9 This is a cross-sectional view of the cooling pipe and winding connection state in Embodiment 3 of the present invention.

[0050] Explanation of reference numerals in the attached figures:

[0051] Power unit 100

[0052] Cooling pipe 11

[0053] Flow channel 111

[0054] Capillary suction core 112

[0055] First extension 113

[0056] First connecting part 114

[0057] Second extension 115

[0058] Inlet extension section 1151

[0059] Water outlet extension section 1152

[0060] Second connecting part 116

[0061] Third Extension 117

[0062] Third connecting part 118

[0063] Diverter 12

[0064] Busbar 13

[0065] Water inlet pipe 14

[0066] Water outlet pipe 15

[0067] Iron core 200

[0068] 300 windings

[0069] Main insulation layer 31

[0070] Inter-turn insulation layer 32

[0071] Metal wire 33

[0072] Winding direction X

[0073] Y-direction of coil stacking within the winding

[0074] The winding direction Z is perpendicular to the winding direction in the horizontal direction. Detailed Implementation

[0075] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments.

[0076]

Example 1

[0077] like Figures 1-4 As shown, this embodiment discloses a power unit 100.

[0078] The power unit 100 includes an iron core 200 and a winding 300, with the winding 300 wound on the iron core 200. Specifically, in this embodiment, slot wedges are provided on the iron core 200, and the slot wedges are arranged sequentially at intervals along the circumferential direction of the iron core 200. That is, the entire assembly process is as follows: first, the winding 300 is wound onto the iron core 200, and then each slot wedge is embedded therein, ultimately forming a shape as shown in the figure. Figure 1 A partial structural schematic diagram of the power unit 100.

[0079] The power unit 100 also includes a cooling pipe 11, which is disposed on the winding 300. Specifically, at least a portion of the cooling pipe 11 is in contact with the winding 300, and the portion of the cooling pipe 11 in contact with the winding 300 extends along the winding direction of the winding 300.

[0080] In this embodiment, by extending the cooling pipe 11 along the winding direction X of the winding and at least partially attaching the cooling pipe 11 to the winding 300, the cooling is mainly aimed at cooling the winding 300, the source of heat generation in the power device 100. This allows for timely and more efficient dissipation of heat generated inside the power device 100, preventing the power device 100 from failing or being damaged due to high temperatures. The coil is no longer indirectly cooled through the heat conduction from the coil to the iron core 200. Furthermore, by arranging the cooling pipe 11 and the winding 300 in the same direction and attaching them to each other, the contact area between the cooling pipe 11 and the winding 300 is increased. This maximizes and purposefully cools the power device 100, effectively improving the heat dissipation efficiency of the winding 300. Simultaneously, the presence of the cooling pipe 11 avoids affecting the winding's installation space, minimizing the size of the power device 100 and improving its compactness and ease of installation. Furthermore, by placing the cooling pipe 11 on the winding 300 without altering the single-turn coil structure, the existing air-cooled and water-cooled heat transfer paths are improved. Simultaneously, the current winding 300 forming process is changed, as the cooling pipe 11 needs to be added between the coils during the forming process. This power unit 100 can be applied to various mechanical and electrical equipment, possessing broad application value.

[0081] Preferably, the winding 300 includes a main insulation layer 31, an inter-turn insulation layer 32, and a metal conductor 33. The inter-turn insulation layer 32 covers the metal conductor 33, and the main insulation layer 31 covers the cooling pipe 11 and the inter-turn insulation layer 32, with the cooling pipe 11 disposed between the main insulation layer 31 and the inter-turn insulation layer 32. This design aims to reduce the heat generated by the metal conductor 33 during operation while ensuring insulation, thereby lowering the overall temperature of the winding 300, improving the heat dissipation efficiency of the winding 300, and ensuring the stable and safe operation of the power unit 100.

[0082] Preferably, such as Figure 2As shown, there are multiple cooling pipes 11, which are arranged sequentially and at intervals along the stacking direction Y of the coils within the winding 300. In this embodiment, the stacking direction Y of the coils within the winding 300 refers to the vertical direction perpendicular to the winding. By using multiple cooling pipes 11 to simultaneously cool the winding 300, the heat dissipation area can be increased, thereby further improving the effect of directly cooling the winding 300.

[0083] Preferably, the inlet and outlet ends of each cooling pipe 11 are located on the same side of the iron core 200. Specifically, the inlet and outlet ends of each cooling pipe 11 are located at the initial and final ends where the winding 300 begins to wind the iron core 200, or at the end of the iron core 200 furthest from the initial and final ends, depending on the specific requirements. This arrangement facilitates the installation of external pipelines and also makes it easier for staff to control and manage the cooling pipes 11, thus improving work efficiency.

[0084] The cooling pipe 11 includes a U-shaped structure arranged around both sides of the iron core 200, and is sandwiched between two layers of coils in the winding 300 along the winding direction X of the winding, that is, in the horizontal direction. Furthermore, the cooling pipes 11 are arranged perpendicular to each other at the bends of the pipes.

[0085] Specifically, the power unit 100 also includes a diverter 12, a manifold 13, an inlet water pipe 14, and an outlet water pipe 15. The diverter 12 is disposed on the inlet end of the plurality of cooling pipes 11 and is connected to the inlet water pipe 14; the manifold 13 is disposed on the outlet end of the plurality of cooling pipes 11 and is connected to the outlet water pipe 15.

[0086] In this embodiment, by adding a flow divider 12 and a flow combiner 13, the multiple cooling pipes 11 can be uniformly controlled, and the flow efficiency and uniformity of the cooling medium in the cooling pipes 11 can be effectively improved, thereby further improving the heat dissipation efficiency of the winding 300.

[0087] In this embodiment, the cooling pipe 11 specifically includes two first extensions 113 and a first connecting portion 114.

[0088] Two first extensions 113 are arranged in parallel, and one end of each is connected to the shunt 12 and the junction 13 respectively. A first connecting part 114 is arranged at the other end of the two first extensions 113, i.e., at the bend of the pipe, and connects the two first extensions 113. The two first extensions 113 are symmetrically arranged on both sides of the first connecting part along the stacking direction Y of the coil in the winding, and the first connecting part 114 and the first extension 113 are arranged perpendicularly at the bend.

[0089] Therefore, according to the above structure, the fluid enters from the inlet pipe 14 and flows sequentially through the diverter 12, the first extension 113, the first connection 114, another first extension 113 and the manifold 13, and finally exits from the outlet pipe 15.

[0090] In this embodiment, the cooling pipe 11 adopts this structural form. By sandwiching the cooling pipe 11 between the two layers of coil, the fit and contact area between the cooling pipe 11 and the coil are increased, ensuring the uniformity of cooling when the cooling pipe 11 and the coil are in contact, thereby improving the heat dissipation efficiency of the winding 300. Furthermore, this design can fully utilize the internal space of the winding 300, resulting in a compact overall structure. Simultaneously, the vertical placement of the cooling pipe 11 at the bend reduces heat dissipation dead zones, allowing the cooling pipe 11 to be evenly distributed throughout the winding 300. In addition, this structural form of the cooling pipe 11 is also suitable for bending and flowing through single or multiple slots.

[0091] Therefore, it can be seen that, Figure 3 As shown, in this embodiment, along the stacking direction of the inner coil of the winding 300, the cooling pipe 11 is sandwiched between the upper and lower metal wires 33, thereby enabling the cooling pipe 11 to cool the heat source, namely the metal wires 33, and to dissipate the heat generated by the metal wires 33 more efficiently in a timely manner.

[0092] Specifically, in this embodiment, both the shunt 12 and the busbar 13 are plate-shaped structures extending along the stacking direction Y of the coils within the winding, which facilitates the unified control of the cooling pipe 11.

[0093] In this embodiment, the cooling pipes 11 are arranged in components. Specifically, multiple sets of cooling pipes 11 are provided, each set including two first extensions 113 and one first connecting part 114. This facilitates the installation of each set of cooling pipes 11 into the winding 300 at different stages of the core 200. The specific method for installing the cooling pipes 11 within the winding 300 includes at least the following implementation methods:

[0094] When winding part of the winding 300 onto the iron core 200, a set of cooling pipes 11 are first placed into the winding 300. As the winding 300 is wound, the remaining cooling pipes 11 are then placed into the winding 300 until all the windings 300 to be wound are wound onto the iron core 200. Then, at the end of the cooling pipe 11 away from the first connecting part 114, the diverter 12 and the manifold 13 are sequentially installed on the other end of the multiple first extensions 113. Through the connection between the diverter 12 and the inlet pipe 14 and the manifold 13 and the outlet pipe 15, the heat exchange system between the cooling pipe 11 and the outside is realized.

[0095] Preferably, the cooling pipe 11 has a plurality of flow channels 111 inside, and the plurality of flow channels 111 are arranged sequentially at intervals in the horizontal direction along a radial direction perpendicular to the extension of the cooling pipe 11. In this embodiment, as shown... Figure 2 As shown, multiple flow channels 111 are arranged sequentially in the horizontal direction along the direction Z perpendicular to the winding direction X of the winding 300. In other embodiments, the arrangement of the flow channels 111 inside the cooling pipe 11 can be configured as needed. In this embodiment, this arrangement not only allows the cooling medium to flow uniformly along the entire length of the cooling pipe 11, achieving more efficient heat dissipation, but also increases the flow area and velocity of the cooling medium, promoting heat transfer and dissipation, and improving heat dissipation efficiency.

[0096] Furthermore, the cross-sectional shape of the multiple flow channels 111 is circular or rectangular. This arrangement can be adaptively adjusted according to different cooling media introduced into the cooling pipe 11, so as to optimize the design according to specific heat dissipation requirements and the characteristics of the cooling media, thereby further improving the hydrodynamic performance of the cooling pipe 11.

[0097] In this embodiment, depending on the structure of the cooling pipe 11, a cooling medium with single-phase or two-phase characteristics and electrical insulation properties can be selected.

[0098] In some embodiments, the cooling medium of the cooling pipe 11 is a two-phase medium, unlike the prior art where the cooling medium, either air or water, is a single phase with a low flow heat transfer coefficient. If the generator power density is further increased, the cooling demand cannot be guaranteed. Therefore, by utilizing the advantages of two-phase medium, such as strong heat carrying capacity during phase change and low vapor transport resistance, heat dissipation capacity can be effectively enhanced. The electrical insulation characteristics of the two-phase medium can avoid the risk of electrical short circuits caused by leakage when using water cooling.

[0099] Preferably, such as Figure 4 As shown, the cooling pipe 11 is made of stainless steel, and when a two-phase working fluid is selected, a capillary liquid suction core 112 is provided on the inner wall surface of the flow channel 111.

[0100] In this embodiment, a stainless steel cooling pipe 11 is used, which improves the heat transfer efficiency and heat dissipation effect of the cooling pipe 11. Simultaneously, a capillary wick 112 is provided on the inner wall of the flow channel 111, which increases the wettability and surface tension of the cooling medium inside, promotes heat transfer and absorption, and improves heat transfer efficiency and heat dissipation effect. The capillary wick 112 can guide the fluid into the interior using tiny liquid columns formed by capillary action, thereby increasing the internal surface area and improving the efficiency of heat and mass transfer, thus possessing high practical value.

[0101]

Example 2

[0102] like Figures 5-6Example 2 discloses another specific structure of the power device 100. The structure of Example 2 is basically the same as that of Example 1. The difference of Example 2 is that the number of the busbars 13 in Example 2 is multiple, and the multiple busbars 13 are symmetrically arranged on both sides of the shunt member 12 along the winding direction X of the winding.

[0103] This design allows the outlet sections of different cooling pipes 11 to be concentrated and converged, enabling the cooling medium to be discharged quickly after heat exchange. It also facilitates the control and management of the cooling pipes 11, further improving the heat dissipation efficiency of the winding 300. Simultaneously, the design increases the redundancy of cooling pipe 11 regulation, ensuring the flow of cooling medium even if any one of the manifolds 13 fails, thus preventing overall operational accidents caused by single-point failures.

[0104] Preferably, the cooling pipe 11 includes a U-shaped structure between two layers of coils that are at least partially sandwiched in the winding 300 on the same side of the iron core 200, and the cooling pipes 11 sandwiched in the winding 300 are arranged sequentially at intervals along the direction perpendicular to the stacking direction Y of the coils in the winding 3, and the cooling pipes 11 are arranged perpendicular to each other at the pipe bends.

[0105] In this embodiment, the cooling pipe 11 specifically includes: two second extensions 115 and a second connecting portion 116.

[0106] The second extension 115 extends along the winding direction X of the winding and is sandwiched between two layers of coils within the winding 300. The second extension 115 includes an inlet extension 1151 and an outlet extension 1152, which are arranged sequentially and parallel to each other along the stacking direction Y perpendicular to the coils within the winding 300. One end of the inlet extension 1151 is connected to the shunt member 12, and one end of the outlet extension 1152 is connected to the busbar 13. The second connecting part 116 is disposed at the other end of the inlet extension 1151 and the outlet extension 1152 and extends along the stacking direction of the coils within the winding, connecting the vertical inlet extension 1151 and the outlet extension 1152. The second connecting part 116 and the second extension 115 are arranged perpendicularly and surround at least a portion of the winding 300.

[0107] In this embodiment, both the shunt 12 and the junction 13 are plate-shaped structures extending along the stacking direction Y of the inner coil of the winding 300, so as to facilitate the unified control of the cooling pipe 11. Therefore, one shunt 12 connects four water inlet extension sections 1151. The four water inlet extension sections 1151 are arranged in pairs and symmetrically at the four ends of the shunt 12. Specifically, two pairs of water inlet extension sections 1151 are symmetrically arranged at both ends of the shunt 12 along the stacking direction Y of the inner coil of the winding 300, and two pairs of water inlet extension sections 1151 are also symmetrically arranged at both ends of the shunt 12 along the winding direction X of the winding 300.

[0108] In addition, the inlet and outlet ends of each cooling pipe 11 are located on the same side of the iron core 200. This application includes two manifolds 13, which are symmetrically arranged on both sides of the shunt 12 along the winding direction X of the winding 300. Therefore, one manifold 13 connects two outlet extension sections 1152, and the two manifolds 13 connect a total of four outlet extension sections 1152. The number of outlet extension sections 1152 corresponds to the number of inlet extension sections 1151 to meet the flow requirements of fluid entering and exiting the cooling pipe 11.

[0109] Therefore, in this embodiment, two water outlet extension sections 1152 are symmetrically arranged at both ends of the busbar 13 along the winding direction X of the winding 300. Specifically, the two water outlet extension sections 1152 on one busbar 13 are arranged close to the two water inlet extension sections 1151 on the side of the shunt member 12 along the winding direction Y of the coil inside the winding. Furthermore, the water outlet extension sections 1152 at both ends of the busbar 13 are respectively arranged close to the water inlet extension sections 1151 at both ends of the shunt member 12 on that side along the winding direction X of the winding. That is, the water inlet extension section 1151 at one end of the shunt member 12 extends along the winding direction X of the winding and is connected to the water outlet extension section 1152 at one end of the busbar 13, which also extends along the winding direction X of the winding, through the second connecting portion 116 extending along the winding direction Y of the coil inside the winding. The cooling pipes 11 at the other ends of the shunt member 12 also adopt the above-described arrangement.

[0110] Furthermore, one of the outlet extension sections 1152 at both ends of the manifold 13 is disposed between the two inlet extension sections 1151 on the same side of the shunt 12, while the other outlet extension section 1152 is disposed below the lowermost inlet extension section 1151 or above the uppermost inlet extension section 1151. The inlet extension sections 1151 disposed at both ends of the shunt 12 in the coil stacking direction Y within the winding can be connected to the outlet extension section 1152 located below or above the inlet extension section 1151 via the second connecting portion 116 extending in the coil stacking direction Y within the winding.

[0111] In other embodiments, the specific configuration and arrangement of the cooling pipe 11 can be configured as needed based on the internal space of the power unit 100 and the winding method of the winding 300.

[0112] Therefore, according to the above structural configuration, fluid enters from the inlet pipe 14 and flows sequentially through the diverter 12, the second extension 115, the second connection 116, another second extension 115, and the manifold 13, and finally exits from the outlet pipe 15. Specifically, the fluid flows sequentially through the inlet extension 1151, the second connection 116, and the outlet extension 1152.

[0113] In this embodiment, by adopting this structural form, the cooling pipes 11 are arranged sequentially at intervals along the stacking direction Y of the coils in the vertical winding 300, and the cooling pipes 11 are set perpendicular to each other at the bends of the pipes. This can ensure the uniformity and comprehensiveness of the cooling medium cooling inside the winding 300, avoid the generation of heat dissipation dead zones, and thus further improve the heat dissipation effect.

[0114] Furthermore, the structure of the cooling pipe 11 in Embodiment 2 differs from that in Embodiment 1, and this arrangement also has the advantage of low electromagnetic loss.

[0115]

Example 3

[0116] like Figures 7-9 Example 3 discloses another specific structure of the power device 100. The structure of Example 3 is basically the same as that of Example 1. The difference of Example 3 is that the cooling pipe 11 of Example 3 includes a U-shaped structure arranged around both sides of the iron core 200 and sandwiched between the winding 300 and the iron core 200. Furthermore, the cooling pipe 11 is arranged perpendicular to each other at the pipe bend.

[0117] In this embodiment, the cooling pipe 11 has a plate-like structure and specifically includes two third extensions 117 and a third connecting part 118.

[0118] Two third extensions 117 are arranged in parallel. In this embodiment, the power unit 100 also includes a water inlet pipe 14 and a water outlet pipe 15. One end of each of the two third extensions 117 is connected to the water inlet pipe 14 and the water outlet pipe 15, respectively. A third connecting part 118 is provided at the other end of the two third extensions 117 and extends horizontally along the winding direction Z perpendicular to the winding, connecting the two third extensions 117. At the bend, the third connecting part 118 and the third extension 117 are arranged perpendicularly.

[0119] In this embodiment, by adopting this structural form and placing both the inlet and outlet of the cooling pipe 11 on the same side of the iron core 200, the arrangement of the cooling pipe 11 can be simplified, reducing the complexity of the cooling pipe 11 layout and the space occupied. By using the cooling pipe 11, which surrounds the iron core 200 and is arranged in a U-shape, not only can the space between the winding 300 and the iron core 200 be fully utilized, but the iron core 200 can also be cooled simultaneously with the winding 300, maximizing the cooling effect. At the same time, it also reduces heat dissipation dead zones, ensuring that the cooling pipe 11 can be cooled comprehensively.

[0120] Therefore, according to the above structure, the fluid enters from the inlet pipe 14 and flows sequentially through the diverter 12, the third extension 117, the third connection 118, another third extension 117 and the manifold 13, and finally exits from the outlet pipe 15.

[0121] In this embodiment, the specific method for installing the cooling pipe 11 on the winding 300 includes at least the following implementation methods:

[0122] First, the cooling pipe 11 is fitted onto both sides of the iron core 200. Then, the water inlet pipe 14 and the water outlet pipe 15 are set on the ends of the two third extensions 117 away from the third connection 118 and connected to the heat exchange system in the outside. Then, the winding 300 is wound on the iron core 200. Thus, the cooling pipe 11, the water inlet pipe 14 and the water outlet pipe 15 are all covered by the winding 300 between the winding 300 and the iron core 200.

[0123] And, as Figure 9 As shown, in this embodiment, along the stacking direction Y perpendicular to the coils inside the winding 300, the flow channels 111 inside the cooling pipe 11 are arranged sequentially at intervals. Thus, the cooling pipe 11 is sandwiched between the metal wire 33 and the iron core 200. This structural form not only achieves cooling of the heat source winding 300, but also reduces the heat transfer path from the iron core 200 to the cooling pipe 11, effectively lowering the temperature of the iron core 200.

[0124]

Example 4

[0125] This embodiment discloses a wind turbine generator, which includes a power unit 100 of any one of embodiments 1-3, wherein the iron core 200 and the winding 300 are used to form a motor stator or a motor rotor, that is, the cooling pipe 11 is integrated with the motor winding 300.

[0126] This arrangement places the cooling pipe 11 inside the main insulation of the wind turbine winding 300, directly contacting the heat source. This effectively reduces thermal resistance, lowers the temperature rise of the winding 300 coil, increases the power density and lifespan of the motor, improves the cooling efficiency of the wind turbine, ensures the normal operation of the wind turbine, and extends its service life. This design has broad application value.

[0127] Preferably, the winding 300 is the stator winding 300 of a permanent magnet wind turbine or the rotor winding 300 of an electrically excited wind turbine.

[0128] Furthermore, in this embodiment, the wind turbine also includes a drive motor for driving the motor rotor to rotate, with both the inlet and outlet of the cooling pipe 11 located on the end of the power unit 100 facing the drive motor. This arrangement facilitates maintenance and adjustment of the cooling pipe 11 by personnel, improving operational efficiency.

[0129] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A power device, comprising an iron core and a winding, the winding being wound on the iron core, characterized in that, The power unit also includes a cooling pipe, which is disposed on the winding, at least a portion of which is in contact with the winding, and the portion of the cooling pipe in contact with the winding extends along the winding direction of the winding. The cooling pipe includes a U-shaped structure arranged around both sides of the iron core, sandwiched between two layers of coils within the winding, with the cooling pipes arranged perpendicularly to each other at the bends; or The cooling pipe includes a U-shaped structure that is at least partially sandwiched between two layers of coils in the winding on the same side of the iron core. The cooling pipes sandwiched in the winding are arranged at intervals along the stacking direction of the coils in the winding, and the cooling pipes are arranged perpendicular to each other at the bends of the pipes.

2. The power unit as described in claim 1, characterized in that, The winding includes a main insulation layer, an inter-turn insulation layer, and a metal conductor. The inter-turn insulation layer covers the metal wire, the main insulation layer covers the cooling pipe and the inter-turn insulation layer, and the cooling pipe is disposed between the main insulation layer and the inter-turn insulation layer.

3. The power unit as described in claim 1, characterized in that, The cooling pipes are multiple, and are arranged at intervals along the stacking direction of the coils within the winding. The power unit also includes a distributor, a collector, an inlet pipe, and an outlet pipe. The diverter is installed at the inlet end of the plurality of cooling pipes and is connected to the inlet pipe; The manifold is installed at the outlet end of the plurality of cooling pipes and is connected to the outlet pipe.

4. The power unit as described in claim 3, characterized in that, The inlet and outlet of each cooling pipe are located on the same side of the iron core.

5. The power unit as described in claim 4, characterized in that, The number of the busbars is multiple, and the multiple busbars are symmetrically arranged on both sides of the splitter.

6. The power unit as described in claim 1, characterized in that, The cooling pipe has multiple flow channels inside, and the multiple flow channels are arranged sequentially at intervals along a radial direction perpendicular to the extension of the cooling pipe; The cross-sectional shape of the multiple flow channels is circular or rectangular.

7. The power unit as described in claim 6, characterized in that, The cooling pipe is made of stainless steel, and a capillary liquid suction core is provided on the inner wall of the flow channel.

8. The power unit as described in claim 1, characterized in that, The cooling material introduced into the cooling pipe is a two-phase working fluid, and the cooling material has electrical insulation properties.

9. A wind turbine generator, characterized in that, The wind turbine includes the power unit as described in any one of claims 1-8, wherein the iron core and the windings are used to form a motor stator or a motor rotor.

10. The wind turbine generator as described in claim 9, characterized in that, The wind turbine includes a drive motor for driving the motor rotor to rotate, and the inlet and outlet of the cooling pipe are both located on the end of the power unit facing the drive motor.

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