Current collector and wind turbine generator system

Abstract

The application discloses a current collecting device and a wind turbine generator unit, and the current collecting device comprises a stator mechanism and a rotor mechanism, the stator mechanism comprises a stator base, a supporting column and a stator assembly, the stator base is provided with a containing groove, the stator assembly is arranged in the containing groove through the supporting column, the stator assembly and the stator base form a heat dissipation space, the supporting column is provided with an umbrella skirt, one side of the stator assembly away from the supporting column is provided with a conductive surface, the rotor mechanism is provided with a contact surface, and the rotor mechanism is rotationally connected with the stator base so that the contact surface and the conductive surface abut and conduct. The application aims to improve the heat dissipation capacity and stability of the current collecting device on the basis of dynamic conduction, simplify the structure of the current collecting device, improve the safety performance of the large-current current collecting ring, and facilitate the later maintenance and maintenance.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wind power generation technology, in particular to a current collecting device and a wind turbine generator system using the same. BACKGROUND

[0002] In order to maximize the power generation efficiency, the wind turbine generator needs to continuously perform yawing operation to align with the wind direction, so the nacelle rotates relative to the tower. At this time, the dynamic transmission of current needs to be realized between the rotating nacelle and the fixed tower through the current collecting ring structure.

[0003] At present, the current collecting ring structure is mainly realized by the relative rotation of the mutually abutting conductive media, such as the rotation of carbon brush and metal abutting or the rotation of carbon brush and carbon brush abutting. However, due to the long-time rotation operation of the wind turbine generator, the two abutting conductive media are rubbed for a long time to generate a lot of heat, and the large current passes through, which reduces the overall safety and reliability of the current collecting ring structure. In the related technology, a special cooling device is arranged to cool and cool the current collecting ring structure. However, the arrangement of the cooling device makes the overall structure of the current collecting ring complex, and the installation and maintenance are difficult. SUMMARY

[0004] The main purpose of the present application is to provide a current collecting device and a wind turbine generator, which aims to improve the heat dissipation capacity and stability of the current collecting device on the basis of dynamic conduction, simplify the structure of the current collecting device, improve the safety performance of the large current collecting ring, and facilitate the later maintenance and maintenance.

[0005] To achieve the above purpose, the present application provides a current collecting device applied to a wind turbine generator, which comprises:

[0006] A stator mechanism comprising a stator seat, a support column and a stator assembly, the stator seat is provided with a receiving groove, the stator assembly is arranged in the receiving groove through the support column, so that the stator assembly and the stator seat form a heat dissipation space, the support column is provided with an umbrella skirt, and the side of the stator assembly away from the support column is provided with a conductive surface; and

[0007] A rotor mechanism provided with a conductive surface, the rotor mechanism is rotatably connected with the stator seat, so that the conductive surface and the conductive surface abut and conduct.

[0008] In an embodiment, the umbrella skirt comprises a fixed part and a heat dissipation part connected with each other, the support column is arranged through the fixed part and the heat dissipation part, and the cross-sectional area of the heat dissipation part perpendicular to the extension direction of the support column is greater than the cross-sectional area of the fixed part perpendicular to the extension direction of the support column.

[0009] In an embodiment, the fixing portion and the heat dissipation portion are integrally formed;

[0010] In an embodiment, the heat dissipation portion is connected to the fixing portion at an end away from the stator assembly, and the cross-sectional area of the heat dissipation portion gradually increases from the fixing portion to the end away from the fixing portion.

[0011] In an embodiment, the umbrella skirt is located at the middle of the support column.

[0012] In an embodiment, the support column is detachably connected to the stator assembly.

[0013] In an embodiment, the support column is detachably connected to the bottom wall of the accommodating groove.

[0014] In an embodiment, the stator seat further comprises an air inlet and an air outlet communicating with the heat dissipation space, and the stator mechanism further comprises a fan, which is arranged at the air inlet and / or the air outlet.

[0015] In an embodiment, the stator mechanism further comprises a check valve, which is arranged at the air outlet.

[0016] In an embodiment, the stator mechanism further comprises a filter screen, which is arranged at the air inlet and / or the air outlet.

[0017] In an embodiment, the stator mechanism further comprises a louver, which is arranged at the air inlet and / or the air outlet.

[0018] In an embodiment, the stator assembly comprises a plurality of stator pieces, the plurality of stator pieces are arranged in concentric circles and are spaced apart, a first gap is formed between adjacent two stator pieces, each stator piece is connected to the stator seat through the support column, and each stator piece is provided with the conductive surface.

[0019] The rotor mechanism comprises a plurality of rotor pieces, the plurality of rotor pieces are arranged in concentric circles and are spaced apart, a second gap is formed between adjacent two rotor pieces, each rotor piece is provided with the contact surface, and each rotor piece is arranged corresponding to a stator piece, so that each contact surface abuts and conducts with a conductive surface.

[0020] In an embodiment, the width of the first gap is 15mm-60mm.

[0021] In an embodiment, the projection of the umbrella skirt on the bottom wall of the accommodating groove partially overlaps the projection of the first gap on the bottom wall of the accommodating groove.

[0022] In an embodiment, each stator piece is connected to the stator seat through a plurality of support columns, and the plurality of support columns are arranged in the circumferential direction of the stator piece.

[0023] In an embodiment, each of the stator members comprises:

[0024] a stator arranged in a ring shape, the stator being connected to the support column, a side of the stator facing away from the support column being provided with a sliding groove; and

[0025] a spring contact finger provided in the sliding groove, a side of the spring contact finger facing away from a bottom wall of the sliding groove forming the conductive surface;

[0026] wherein each of the rotor members is provided with a protruding portion, a side of the protruding portion facing away from the rotor member forming the contact surface, and part of the protruding portion extending into the sliding groove so that the protruding portion abuts against the spring contact finger.

[0027] In an embodiment, a bottom wall of the sliding groove is concavely formed with a groove, the spring contact finger is accommodated and limited in the groove, and part of the spring contact finger protrudes from a slot of the groove.

[0028] In an embodiment, the spring contact finger comprises a plurality of contact finger portions and a plurality of connecting portions, the plurality of contact finger portions and the plurality of connecting portions are alternately connected and arranged in a ring shape, a side of each of the contact finger portions facing away from the bottom wall of the sliding groove forms the conductive surface, the groove comprises a plurality of first groove segments and a plurality of second groove segments, the plurality of first groove segments and the plurality of second groove segments are alternately arranged and communicate with each other, each of the contact finger portions is accommodated in a first groove segment, and part of the contact finger portions protrude from a slot of the first groove segment, each of the connecting portions is accommodated in a second groove segment.

[0029] Furthermore, each of the stator members further comprises a lubricating grease, the lubricating grease being accommodated in the groove.

[0030] In an embodiment, each of the stator members further comprises a copper bar and a temperature sensor, one end of the copper bar being connected to the stator, the other end of the copper bar penetrating through a bottom wall of the accommodating groove, the temperature sensor being arranged on a side of the stator seat facing away from the rotor member and abutting against the end of the copper bar extending out of the accommodating groove.

[0031] In an embodiment, the stator mechanism further comprises a cable seat and a cable, the cable seat being connected to an end of the stator seat away from the rotor mechanism, one end of the cable being connected to the copper bar, the other end of the cable being fixed to the cable seat.

[0032] Furthermore, each of the stator members further comprises a plurality of the copper bars, the plurality of copper bars being arranged at intervals along a circumferential direction of the stator.

[0033] In an embodiment, the rotor mechanism further comprises:

[0034] a rotor base rotatably connected to the stator base and covering the slot opening of the accommodating slot, a plurality of rotor pieces connected to the rotor base and accommodated in the accommodating slot; and

[0035] a steel ring provided at the periphery of the rotor base and in sliding abutment with the outer wall of the stator base.

[0036] In an embodiment, each of the rotor pieces comprises:

[0037] a rotor provided with the live-contact surface;

[0038] a yoke assembly, one end of which is connected to the side of the rotor away from the live-contact surface, and the other end of which is connected to the rotor base; and

[0039] a connecting row, one end of which is connected to the rotor via a copper row, and the other end of which penetrates the rotor base for connecting to a cable.

[0040] In an embodiment, the yoke assembly comprises a yoke base, a yoke rod, a yoke sleeve and a compression spring, the yoke base being connected to the side of the rotor away from the live-contact surface, the yoke rod being sleeved on the yoke base, the compression spring being installed between the yoke base and the yoke rod, the yoke sleeve being sleeved on the yoke rod, and the end of the yoke rod away from the yoke base being connected to the rotor base.

[0041] In an embodiment, the outer wall of the stator base is provided with a wear-resistant ring, and the steel ring is in sliding abutment with the wear-resistant ring.

[0042] Furthermore, the stator base is also provided with a wear-resistant block adjacent to the slot opening of the accommodating slot, and the rotor base is in sliding abutment with the wear-resistant block.

[0043] Furthermore, the yoke assembly comprises a plurality of yoke assemblies, and the plurality of yoke assemblies are arranged at intervals along the circumference of the rotor.

[0044] Furthermore, each of the rotor pieces is connected to a plurality of connecting rows, and the plurality of connecting rows are arranged at intervals along the circumference of the rotor.

[0045] Furthermore, the plurality of connecting rows of the plurality of rotors are arranged in a spiral shape along the radial direction.

[0046] Furthermore, the rotor base is provided with a through hole corresponding to the connecting row, and the connecting row comprises a wire row, a female row and a fixing block, one end of the wire row is connected to the side of the rotor base facing the rotor via the fixing block, the female row is sleeved on the outside of the wire row, the other end of the wire row penetrates the through hole and is connected to the cable.

[0047] In an embodiment, the rotor mechanism further comprises a partition assembly, the partition assembly comprises:

[0048] a mounting block connected to the rotor base; and

[0049] a plurality of partition plates arranged in concentric circles and connected to the mounting block respectively, each of the partition plates being located in one of the second gaps.

[0050] In an embodiment, the mounting block comprises a plurality of mounting blocks arranged in the circumferential direction of the partition plate;

[0051] and / or, the mounting block comprises a mounting portion and a protruding portion protruding from the mounting portion, the protruding portion being connected to the rotor base, the mounting portion extending in the radial direction and being connected to the plurality of partition plates respectively;

[0052] and / or, each of the partition plates comprises a cylindrical portion and a plurality of lug portions, the cylindrical portion being a hollow cylinder, the plurality of lug portions being arranged in the one end of the cylindrical portion, each of the lug portions being provided with a mounting groove, and part of the mounting block being located in the mounting groove.

[0053] In an embodiment, the rotor mechanism further comprises an oil drain and an oil injector, the oil drain being connected to the rotor base and arranged corresponding to the stator assembly, the oil injector being connected to the end of the oil drain away from the rotor base, the oil injector being used to supply lubricating grease to the stator assembly.

[0054] In an embodiment, the current collecting device further comprises a weak current slip ring, the rotor mechanism is provided with a first through hole, the stator mechanism is provided with a second through hole corresponding to the first through hole, the second through hole sequentially penetrating the stator assembly and the stator base, and the weak current slip ring is sequentially arranged in the first through hole and the second through hole.

[0055] The application further provides a wind turbine generator, which comprises:

[0056] a tower;

[0057] a nacelle connected to the tower in a rotatable manner, the nacelle being provided with a generator; and

[0058] the current collecting device as described above, the rotor mechanism of the current collecting device being arranged in the nacelle and connected to the generator, and the stator mechanism of the current collecting device being connected to the tower.

[0059] The current collector of this invention comprises a stator base, a support column, and a stator assembly. The stator assembly is installed in the receiving groove of the stator base via the support column, forming a heat dissipation space. This space allows for heat dissipation of the stator assembly, while the support column further directs heat from the stator assembly into the heat dissipation space, enhancing the heat dissipation effect. Furthermore, the support column is equipped with a skirt to increase its heat dissipation area, effectively improving the heat dissipation capacity of the stator mechanism. A conductive surface is provided on the side of the stator assembly facing away from the support column, and a contact surface is provided on the rotor mechanism. The rotor mechanism is rotatably connected to the stator base, allowing the contact surface to contact the conductive surface for electrical conduction, thus enabling dynamic power transfer from the rotor mechanism to the stator mechanism. It is understood that the current collector of this invention not only improves heat dissipation and stability but also eliminates the need for a separate cooling device, greatly simplifying the overall structure of the current collector, improving the safety performance of high-current collector rings, and facilitating later maintenance and upkeep. Attached Figure Description

[0060] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0061] Figure 1 This is a schematic diagram of the current collection device in one embodiment of the present invention;

[0062] Figure 2 This is a schematic diagram of the stator mechanism in one embodiment of the present invention;

[0063] Figure 3 This is a top view of the stator mechanism in one embodiment of the present invention;

[0064] Figure 4 This is a partial cross-sectional schematic diagram of the stator mechanism in one embodiment of the present invention;

[0065] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0066] Figure 6 This is a schematic diagram of the stator component in one embodiment of the present invention;

[0067] Figure 7 This is a top view of the stator component in one embodiment of the present invention;

[0068] Figure 8 for Figure 7An enlarged schematic view at B;

[0069] Figure 9 A sectional view of a part of the rotor and the stator in an embodiment of the present application;

[0070] Figure 10 A structural view of a cable seat in an embodiment of the present application;

[0071] Figure 11 A structural view of a rotor mechanism in an embodiment of the present application;

[0072] Figure 12 A structural view of a rotor member in an embodiment of the present application;

[0073] Figure 13 A structural view of a partition assembly in an embodiment of the present application;

[0074] Figure 14 A structural view of a weak current slip ring in an embodiment of the present application.

[0075] Brief Description of the Drawings:

[0076]

[0077]

[0078] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0079] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0080] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directionality indications also change accordingly.

[0081] Meanwhile, the meaning of "and / or" or "and / or" in the whole text is that three schemes are included. Taking "A and / or B" as an example, the scheme A, the scheme B, or the scheme of A and B being satisfied at the same time are included.

[0082] In addition, the descriptions such as "first", "second" and the like in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0083] In order to ensure the maximum power generation efficiency, the wind turbine needs to continuously perform yawing operation to align the wind direction, so the wind turbine nacelle will rotate relative to the tower. At this time, the dynamic transmission of current needs to be realized between the rotating wind turbine nacelle and the fixed tower through the current collecting ring structure.

[0084] At present, the current collecting ring structure is mainly realized by the relative rotation of the conductive medium in contact with each other, such as the rotation of carbon brush and metal in contact or the rotation of carbon brush and carbon brush in contact, to realize the dynamic transmission of current. However, due to the long time rotation of the wind turbine, the two conductive media in contact with each other are rubbed for a long time, which generates a lot of heat, and is accompanied by the passage of large current, so that the overall safety and reliability of the current collecting ring structure is reduced. In the related art, a special cooling device is provided to cool and cool the current collecting ring structure, but the setting of the cooling device makes the overall structure of the current collecting ring complex, and the installation and maintenance are difficult.

[0085] In addition, in addition to the large current line output by the fan, there are many control lines and power transmission lines connected between the tower bottom and the tower top fan. The slip ring technology in the related art cannot meet the connection of all lines through the slip ring. After the fan runs for a period of time, it needs to be stopped to untie the cable to avoid the cable from being twisted off. At the same time, the conductive slip ring structure in the related art is often complex in structure, easy to wear, not stable enough, difficult to install, difficult to maintain or not suitable for large current use.

[0086] Based on the above problems, the present invention proposes a power collection device 100. It is understood that this power collection device 100 is used to transmit and collect electricity generated by the generator in a wind turbine generator set. Power transmission can be performed through dynamic contact, where dynamic contact means that two relatively moving power transmission mechanisms remain in contact. Compared to existing technologies that separately install cooling devices in wind turbine generators, the current collector 100 of this application provides a heat dissipation space 136 inside the stator mechanism 1. When the rotor mechanism 2 rotates or turns relative to the stator mechanism 1, the contact surface and the conductive surface come into contact, generating heat. This heat is then dissipated using the heat dissipation space 136. Simultaneously, by providing a support column 12 to install the stator assembly 13 in the receiving groove 111 of the stator base 11, the heat generated by the stator assembly 13 can be directly introduced into the heat dissipation space 136 for heat dissipation. Furthermore, by providing a skirt 121 on the support column 12, the heat dissipation area of ​​the support column 12 is increased, effectively and quickly achieving heat dissipation and improving the heat dissipation effect. This improves the heat dissipation effect and stability of the current collector 100, simplifies the structure of the current collector 100, improves the safety performance of the high-current collector ring, and facilitates later maintenance and upkeep.

[0087] The current collector 100 of this application is suitable for wind turbine yaw, where the rotor rotation speed is slow, and it can withstand large currents and has a stable structure. It provides a new type of conductive slip ring structure with a long service life in the extreme environment of wind turbines.

[0088] Please refer to the reference. Figures 1 to 14 As shown, in this embodiment of the invention, the current collector 100 includes a stator mechanism 1 and a rotor mechanism 2. The stator mechanism 1 includes a stator base 11, a support column 12, and a stator assembly 13. The stator base 11 is provided with a receiving groove 111. The stator assembly 13 is disposed in the receiving groove 111 through the support column 12, so that the stator assembly 13 and the stator base 11 enclose a heat dissipation space 136. The support column 12 is provided with a skirt 121. The side of the stator assembly 13 facing away from the support column 12 is provided with a conductive surface. The rotor mechanism 2 is provided with a contact surface. The rotor mechanism 2 is rotatably connected to the stator base 11 so that the contact surface and the conductive surface abut against each other and conduct electricity.

[0089] In this embodiment, the current collector 100 is applied to a wind turbine generator set. The rotor mechanism 2 of the current collector 100 is connected to the yaw mechanism of the wind turbine via a cable and rotates accordingly. The stator mechanism 1 is fixedly connected to the wind turbine tower, making the stator mechanism 1 a stationary mechanism. The conductive surface of the stator assembly 13 in the stator mechanism 1 is brought into contact with the contact surface of the rotor mechanism 2, so that when the rotor mechanism 2 rotates or turns relative to the stator mechanism 1, the conductive surface and the contact surface remain in contact or are in a state of contact, thereby enabling the rotor mechanism 2 and the stator mechanism 1 to conduct electricity.

[0090] It can be understood that the stator base 11 of the stator mechanism 1 is used for mounting, supporting and fixing the support column 12, the stator assembly 13 and the rotor mechanism 2 and the like, that is, the stator base 11 provides a mounting basis for the support column 12, the stator assembly 13 and the rotor mechanism 2 and the like. In the embodiment, the stator base 11 is provided with a receiving groove 111, which can be a recess structure or a through groove structure, which is not limited here. Alternatively, the stator base 11 is a cylindrical structure with an opening at one end.

[0091] In the embodiment, the receiving groove 111 of the stator base 11 has a bottom wall and a side wall, and the stator assembly 13 is arranged in the receiving groove 111 through the support column 12, so that the stator assembly 13 and the stator base 11 form a heat dissipation space 136. It can be understood that the stator assembly 13 can be connected to the bottom wall and / or the side wall of the receiving groove 111 through the support column 12, so that the stator assembly 13 and the bottom wall and the side wall of the receiving groove 111 of the stator base 11 form a heat dissipation space 136, so that the heat dissipation space 136 can be used to fully and effectively dissipate the heat generated by the stator assembly 13.

[0092] It can be understood that the support column 12 is optionally arranged on the bottom wall of the receiving groove 111 of the stator base 11, which is used to support the stator assembly 13, on the one hand to realize the mounting and fixing of the stator assembly 13, and on the other hand to facilitate the formation of the heat dissipation space 136, thereby improving the heat dissipation effect. In the embodiment, the side of the stator assembly 13 away from the support column 12 is provided with a conductive surface, and the rotor mechanism 2 is provided with a contact surface, and the rotor mechanism 2 is rotatably connected with the stator base 11, so that the contact surface and the conductive surface are in contact and conductive, so that when the rotor mechanism 2 rotates or rotates relative to the stator base 11, the contact surface and the conductive surface always maintain contact, so that dynamic power transmission can be formed.

[0093] The current collecting device 100 of the present application sets the stator mechanism 1 as the stator base 11, the support column 12 and the stator assembly 13, installs the stator assembly 13 in the containing groove 111 of the stator base 11 through the support column 12, makes the stator assembly 13 and the containing groove 111 of the stator base 11 enclose the heat dissipation space 136, thereby realizing heat dissipation of the stator assembly 13 by the heat dissipation space 136, and further introducing the heat of the stator assembly 13 into the heat dissipation space 136 through the support column 12, thereby improving the heat dissipation effect, further increasing the heat dissipation area of the support column 12 by setting the umbrella skirt 121 on the support column 12, so as to effectively improve the heat dissipation capacity of the stator mechanism 1; and the electrically conductive surface is arranged on the side of the stator assembly 13 away from the support column 12, and the electrically conductive surface is arranged on the rotor mechanism 2, so as to rotate the rotor mechanism 2 and the stator base 11, make the electrically conductive surface and the electrically conductive surface abut and conduct, thereby realizing dynamic transmission of electric power from the rotor mechanism 2 to the stator mechanism 1. It can be understood that the current collecting device 100 of the present application not only improves the heat dissipation capacity and stability, but also does not need to set a separate cooling device, greatly simplifies the structure of the whole current collecting device 100, improves the safety performance of the large current current collecting ring, and is convenient for later maintenance and maintenance.

[0094] In the present embodiment, the stator assembly 13 is rigidly connected with the stator base 11 through the support column 12, and the umbrella skirt 121 on the support column 12 can be a heat-shrinkable umbrella skirt. The umbrella skirt 121 makes the contact between the rotor mechanism 2 and the stator assembly 13 suspended, increases the heat convection area, and helps to dissipate heat and transmit large current.

[0095] In order to further increase the heat dissipation effect, a plurality of umbrella skirts 121 are optionally arranged on the support column 12, and the plurality of umbrella skirts 121 are arranged at intervals along the extension direction of the support column 12. In the present embodiment, the umbrella skirt 121 is optionally located at the middle part of the support column 12.

[0096] In order to further improve the disassembly and assembly convenience, the support column 12 and the stator assembly 13 are optionally detachably connected, for example, by buckle connection, plug-in cooperation, screw connection or pin connection, which is not limited herein. The bottom wall of the containing groove 111 and the support column 12 are optionally detachably connected, for example, by buckle connection, plug-in cooperation, screw connection or pin connection, which is not limited herein. In the present embodiment, the support column 12 and the stator assembly 13 are connected by screws, and the bottom wall of the containing groove 111 and the support column 12 are connected by screws.

[0097] In an embodiment, the umbrella skirt 121 comprises a fixed part 122 and a heat dissipation part 123 connected with each other, the support column 12 is arranged through the fixed part 122 and the heat dissipation part 123, and the cross-sectional area of the heat dissipation part 123 perpendicular to the extension direction of the support column 12 is greater than the cross-sectional area of the fixed part 122 perpendicular to the extension direction of the support column 12.

[0098] In the embodiment, as shown in Figure 4 and Figure 5 shown, by setting the umbrella skirt 121 as a fixed part 122 and a heat dissipation part 123, so that the umbrella skirt 121 is connected and installed on the support column 12 through the fixed part 122, and the cross-sectional area of the heat dissipation part 123 perpendicular to the extension direction of the support column 12 is greater than that of the fixed part 122, so that the umbrella skirt 121 increases the heat dissipation convection area through the heat dissipation part 123.

[0099] As can be understood, as shown in Figure 5 , the heat dissipation part 123 is connected to the end of the fixed part 122 away from the stator assembly 13, and the cross-sectional area of the heat dissipation part 123 gradually increases from the fixed part 122 to the end away from the fixed part 122.

[0100] Optionally, the fixed part 122 and the heat dissipation part 123 are integrally formed. The umbrella skirt 121 is provided with a mounting hole penetrating through the fixed part 122 and the heat dissipation part 123, and the support column 12 is arranged in the mounting hole of the umbrella skirt 121. As can be understood, the support column 12 and the umbrella skirt 121 can be fixedly connected, for example, by welding, bonding, etc., so as to improve the connection stability of the support column 12 and the umbrella skirt 121. Of course, the support column 12 and the umbrella skirt 121 can also be detachably connected, for example, by snap connection, plug-in cooperation, screw connection or pin connection, etc., which is not limited here. In this way, the support column 12 and the umbrella skirt 121 can be conveniently disassembled, and multiple umbrella skirts 121 can be arranged according to actual conditions, which is not limited here.

[0101] In an embodiment, the stator base 11 is also provided with an air inlet 112 and an air outlet 113 communicating with the heat dissipation space 136, and the stator mechanism 1 further includes a fan 141 arranged at the air inlet 112 and / or the air outlet 113.

[0102] In the embodiment, as shown in Figures 1 to 4 , by arranging the air inlet 112 and the air outlet 113 on the stator base 11, it is convenient to introduce cold air into the heat dissipation space 136 through the air inlet 112 and discharge it through the air outlet 113 to provide heat exchange effect, thereby improving the heat dissipation capacity. As can be understood, by arranging the fan 141 at the air inlet 112 and / or the air outlet 113, a directional driving force is formed on the airflow in the heat dissipation channel formed by the air inlet 112, the heat dissipation space 136 and the air outlet 113 by the fan 141, so as to accelerate heat exchange and further improve the heat dissipation effect.

[0103] It can be understood that the fan 141 can be a centrifugal fan. The fan 141 is optionally arranged at the air outlet 113. Of course, in other embodiments, the fan 141 can also be arranged at the air inlet 112. Alternatively, the fan 141 is arranged at both the air inlet 112 and the air outlet 113, which is not limited herein.

[0104] In an embodiment, as shown in Figures 1 to 4 The stator mechanism 1 further comprises a check valve 142 arranged at the air outlet 113, so that the check valve 142 is used to make the airflow in the heat dissipation channel formed by the air inlet 112, the heat dissipation space 136 and the air outlet 113 form a one-way flow.

[0105] In an embodiment, as shown in Figures 1 to 4 The stator mechanism 1 further comprises a filter screen 143 arranged at the air inlet 112 and / or the air outlet 113. It can be understood that the arrangement not only realizes heat exchange and heat dissipation of the current collecting device 100, but also plays a role in dust removal, which is helpful for the transmission of large current.

[0106] Optionally, the filter screen 143 is arranged at the air inlet 112. Of course, in other embodiments, the filter screen 143 can also be arranged at the air inlet 112. Alternatively, the filter screen 143 is arranged at both the air inlet 112 and the air outlet 113, which is not limited herein. In the present embodiment, the specific structure of the filter screen 143 can refer to the prior art, which is not described herein.

[0107] In an embodiment, as shown in Figures 1 to 4 The stator mechanism 1 further comprises a louver 144 arranged at the air inlet 112 and / or the air outlet 113. It can be understood that the arrangement not only realizes heat exchange and heat dissipation of the current collecting device 100, but also plays a role in dust removal, which is helpful for the transmission of large current.

[0108] It can be understood that the louver 144 is optionally arranged at the air inlet 112. Of course, in other embodiments, the louver 144 can also be arranged at the air inlet 112. Alternatively, the louver 144 is arranged at both the air inlet 112 and the air outlet 113, which is not limited herein. In the present embodiment, the specific structure of the louver 144 can refer to the prior art, which is not described herein.

[0109] In an embodiment, the stator assembly 13 comprises a plurality of stator pieces 131, the plurality of stator pieces 131 are arranged in concentric circles and are spaced apart, a first gap 1324 is formed between adjacent two stator pieces 131, each stator piece 131 is connected with the stator base 11 through the support column 12, and each stator piece 131 is provided with a conductive surface; the rotor mechanism 2 comprises a plurality of rotor pieces 21, the plurality of rotor pieces 21 are arranged in concentric circles and are spaced apart, a second gap is formed between adjacent two rotor pieces 21, each rotor piece 21 is provided with a contact surface, and each rotor piece 21 is arranged correspondingly with a stator piece 131, so that each contact surface is in abutment and conduction with a conductive surface when the rotor mechanism 2 is rotationally connected with the stator base 11.

[0110] In the embodiment, as shown in Figures 2 to 3 , Figure 11 , Figure 12 , the stator assembly 13 is provided with a plurality of stator pieces 131, each stator piece 131 is provided with a conductive surface, the rotor mechanism 2 is provided with a plurality of rotor pieces 21, each rotor piece 21 is provided with a contact surface, and each rotor piece 21 is arranged correspondingly with a stator piece 131, so that each contact surface is in abutment and conduction with a conductive surface when the rotor mechanism 2 is rotationally connected with the stator base 11, thereby realizing the current transmission of the plurality of rotor pieces 21 of the rotor mechanism 2 through the plurality of stator pieces 131 of the stator mechanism 1 in the current collecting device 100, so as to realize the transmission of large current.

[0111] It can be understood that, by arranging the plurality of stator pieces 131 in concentric circles and being spaced apart, the first gap 1324 is formed between adjacent two stator pieces 131, and by arranging the plurality of rotor pieces 21 in concentric circles and being spaced apart, the second gap is formed between adjacent two rotor pieces 21, so that the first gap 1324 and the second gap are correspondingly communicated when the rotor mechanism 2 is rotationally connected with the stator base 11, and the structure of the stator assembly 13 and the rotor mechanism 2 is simplified, and the heat dissipation space 136 can be communicated through the first gap 1324 and the second gap, so that the heat generated by the rotor mechanism 2 can be effectively transmitted to the heat dissipation space 136 through the first gap 1324 and the second gap for heat dissipation, thereby further improving the heat dissipation effect and the heat dissipation capacity.

[0112] In an embodiment, the width of the first gap 1324 is 15mm-60mm. In the embodiment, as shown in Figure 3 , the width of the first gap 1324 is the width of the first gap 1324 in the radial direction. By setting the distance between adjacent two stator pieces 131 to be between 15mm and 60mm, the overall layout of the plurality of cables can be optimized, the capacity of the conductive slip ring for transmitting large current is increased, and the installation and maintenance are facilitated to a certain extent; by controlling the width of the first gap 1324, the creepage distance between adjacent two stator pieces 131 is effectively increased, thereby preventing current breakdown.

[0113] Optionally, the width of the first gap 1324 is 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, etc., which is not limited herein.

[0114] In the embodiment, the width of the second gap can be selected as 15 mm to 60 mm. The width of the second gap is the width of the second gap in the radial direction. By setting the distance between the two adjacent rotor members 21 to be between 15 mm and 60 mm, the overall layout of the plurality of cables can be optimized, the ability of the conductive slip ring to transmit large current is increased, and installation and maintenance are facilitated to some extent. By controlling the width of the second gap, the creepage distance between the two adjacent rotor members 21 is effectively increased, thereby preventing current breakdown. Optionally, the width of the second gap is the same as the width of the first gap 1324.

[0115] It can be understood that the widths of the plurality of first gaps 1324 formed by the plurality of stator members 131 can be the same or different. Optionally, the widths of the plurality of first gaps 1324 gradually increase from the center of the stator assembly 13 in the radial direction. Of course, the widths of the plurality of second gaps formed by the plurality of rotor members 21 can be the same or different. Optionally, the widths of the plurality of second gaps gradually increase from the center of the rotor mechanism 2 in the radial direction.

[0116] In the embodiment, as shown in Figure 3 , the projection of the umbrella skirt 121 on the bottom wall of the accommodating groove 111 partially overlaps the projection of the first gap 1324 on the bottom wall of the accommodating groove 111. It can be understood that the cross-sectional area of the umbrella skirt 121 perpendicular to the extension direction of the support column 12 is greater than the area of the stator member 131 in the overlapping portion of the support column 12, so that the heat dissipation area can be effectively increased by the umbrella skirt 121, and the heat dissipation effect is improved.

[0117] In order to further improve the installation stability of the stator member 131, optionally, the support column 12 includes a plurality of support columns 12, each stator member 131 is connected to the stator base 11 by the plurality of support columns 12, and the plurality of support columns 12 are arranged at intervals in the circumferential direction of the stator member 131. Optionally, the number of support columns 12 is 2 to 10. In the embodiment, as shown in Figure 3 , the connecting line of the support columns 12 connected to the two adjacent stator members 131 does not coincide with the radial direction of the stator assembly 13, so that the umbrella skirts 121 on the adjacent support columns 12 do not affect each other, which can avoid structural interference and improve the heat dissipation effect.

[0118] It can be understood that the plurality of stator pieces 131 can be selected as two, three, four, five, six or more, which is not limited herein. Correspondingly, the plurality of rotor pieces 21 can be selected as two, three, four, five, six or more, which is not limited herein. In the embodiment, the stator pieces 131 can be selected as six, and the rotor pieces 21 can be selected as six. The six stator pieces 131 are arranged in a concentric circle structure, the six rotor pieces 21 are arranged in a concentric circle structure, and the rotor pieces 21 and the stator pieces 131 are arranged one by one.

[0119] In the related art, for example, CN114725746A discloses a conductive slip ring structure, which discloses a conductive slip ring capable of pre-adjusting the rotating speed of the device. The structure is installed with a conductive rod on the end face of the rotor, and a conductive adjusting ring composed of different resistance arc segments and insulation arc segments is fixed on the conductive rod. By rotating the conductive rod, different resistance arc segments are in contact with the conductive ring to change the circulating current, thereby realizing the pre-adjustment of the rotating speed of the device. However, the conductive slip ring of this structure will be more severely worn as the use time increases, and is not suitable for the relatively extreme working conditions of wind power.

[0120] In an embodiment, each stator piece 131 includes a stator 132 and a spring contact finger 133. The stator 132 is arranged in a ring shape, and the stator 132 is connected to the support column 12. The side of the stator 132 away from the support column 12 is provided with a sliding groove 1325, and the spring contact finger 133 is arranged in the sliding groove 1325. The side of the spring contact finger 133 away from the bottom wall of the sliding groove 1325 forms a conductive surface. Each rotor piece 21 is provided with a protruding part 2111, and the side of the protruding part 2111 away from the rotor piece 21 forms a contact surface. Part of the protruding part 2111 extends into the sliding groove 1325, so that the protruding part 2111 abuts against the spring contact finger 133.

[0121] In the embodiment, as shown in Figures 2 to 9 The stator 132 of the stator piece 131 can be selected as a circular ring structure, so that the stators 132 of the plurality of stator pieces 131 are arranged in a concentric circle structure with different diameters. In order to realize the installation of the spring contact finger 133 and facilitate cooperation with the rotor piece 21 to realize dynamic abutment, the top surface of the stator 132 is provided with a sliding groove 1325. Alternatively, the sliding groove 1325 is arranged in the circumferential direction of the stator 132, that is, the sliding groove 1325 is a ring-shaped groove structure.

[0122] It can be understood that the spring contact finger 133 is arranged in the sliding groove 1325. By forming a conductive surface on the side of the spring contact finger 133 away from the bottom wall of the sliding groove 1325, the contact surface of the protruding part 2111 of the rotor piece 21 always abuts against the conductive surface of the spring contact finger 133 when the protruding part 2111 extends into the sliding groove 1325. Alternatively, the width of the sliding groove 1325 in the radial direction is greater than the width of the protruding part 2111 in the radial direction.

[0123] In the embodiment, when the protruding part 2111 abuts against the spring contact finger 133, the rotor member 21 is under the compression force, the spring contact finger 133 is compressed, thereby increasing the contact area between the rotor member 21 and the stator member 131, and the current flows through the spring contact finger 133. This mode is helpful for the transmission of large current, and increases the reliability of the device.

[0124] In an embodiment, as shown in Figure 2 , Figures 5 to 9 the bottom wall of the sliding groove 1325 is concavely formed with a groove 1321, the spring contact finger 133 is accommodated and limited in the groove 1321, and part of the spring contact finger 133 protrudes from the slot of the groove 1321. It can be understood that, by arranging the groove 1321 on the bottom wall of the sliding groove 1325, on the one hand, the groove 1321 is used for limiting and installing the spring contact finger 133, and on the other hand, during the rotation of the rotor member 21 relative to the stator member 131, the problem that the spring contact finger 133 moves with the rotor member 21 is avoided.

[0125] Of course, in order to further reduce the wear between the rotor member 21 and the stator member 131, in an embodiment, the stator member 131 further comprises lubricating grease, and the lubricating grease is accommodated in the groove 1321. It can be understood that the lubricating grease can not only reduce the wear between the rotor member 21 and the stator member 131, but also help the current collecting device 100 to transmit large current.

[0126] It should be noted that the lubricating grease in the groove 1321 sinks to the stator base 11 under the action of gravity, and if such phenomenon occurs, it may cause each phase to be short-circuited by breakdown. The arrangement of the umbrella skirt 121 on the support column 12 can effectively prevent the breakdown between the phases along the stand column.

[0127] In an embodiment, the spring contact finger 133 comprises a plurality of finger parts 1331 and a plurality of connecting parts 1332, the plurality of finger parts 1331 and the plurality of connecting parts 1332 are alternately connected and form a ring, each finger part 1331 forms a conductive surface on the side away from the bottom wall of the sliding groove 1325, the groove 1321 comprises a plurality of first groove segments 1322 and a plurality of second groove segments 1323, the plurality of first groove segments 1322 and the plurality of second groove segments 1323 are alternately arranged and communicate with each other, each finger part 1331 is accommodated in a first groove segment 1322, and part of the finger part 1331 protrudes from the slot of the first groove segment 1322, and each connecting part 1332 is accommodated in a second groove segment 1323.

[0128] In the embodiment, as shown in Figure 2 , Figures 5 to 9As shown, by setting the spring contact fingers 133 as a plurality of finger portions 1331 and a plurality of connecting portions 1332, the plurality of finger portions 1331 and the plurality of connecting portions 1332 are alternately connected and form a ring shape, so that the stator member 131 can abut against the rotor member 21 through the plurality of finger portions 1331, and at the same time, the wear problem between the stator member 131 and the rotor member 21 can be reduced.

[0129] In an embodiment, as shown in Figure 4 , each stator member 131 further comprises a copper bar 134 and a temperature sensor 135, one end of the copper bar 134 is connected to the stator 132, the other end of the copper bar 134 penetrates through the bottom wall of the accommodating groove 111, the temperature sensor 135 is arranged on the side of the stator seat 11 away from the rotor member 21 and abuts against the end of the copper bar 134 extending out of the accommodating groove 111.

[0130] In this embodiment, by connecting the copper bar 134 on the stator 132, the current transmitted from the rotor member 21 to the stator member 131 is conducted by the copper bar 134. The copper bar 134 can be selected as a copper wire bar, a spring or a conductive connecting plate, etc., which is not limited here. It can be understood that by arranging the temperature sensor 135, the temperature of the stator member 131 is detected by the temperature sensor 135, and a temperature signal is transmitted to prevent the temperature of the conductive slip ring from rising too high.

[0131] It can be understood that the temperature sensor 135 can be fixed on the copper bar 134 or on the stator seat 11, and the detection probe of the temperature sensor 135 can directly abut against the copper bar 134 or be arranged close to the copper bar 134, which is not limited here.

[0132] Optionally, each stator member 131 further comprises a plurality of copper bars 134, and the plurality of copper bars 134 are arranged at intervals along the circumferential direction of the stator 132. Such arrangement is helpful for the current collecting device 100 to transmit large current.

[0133] In an embodiment, the stator mechanism 1 further comprises a cable seat 151 and a cable 152, the cable seat 151 is connected to the end of the stator seat 11 away from the rotor mechanism 2, one end of the cable 152 is connected to the copper bar 134, and the other end of the cable 152 is fixed to the cable seat 151.

[0134] In this embodiment, as shown in Figure 1 , Figure 2 , Figure 4 and Figure 10 , by arranging the cable seat 151, the plurality of cables 152 can be conveniently installed and fixed by the cable seat 151, and the sequential connection of the cables 152 can be realized, avoiding the disorder of the cables 152.

[0135] In an embodiment, the rotor mechanism 2 further comprises a rotor base 22 and a steel ring 23, wherein the rotor base 22 is rotationally connected to the stator base 11 and covers the slot opening of the accommodating slot 111, the plurality of rotor pieces 21 are connected to the rotor base 22 and accommodated in the accommodating slot 111, and the steel ring 23 is arranged at the periphery of the rotor base 22 and in sliding abutment with the outer wall of the stator base 11.

[0136] In the embodiment, as shown in Figure 1 and Figure 11 , the rotor base 22 is arranged, so as to facilitate the installation and fixation of the plurality of rotor pieces 21 by the rotor base 22, that is, the plurality of rotor pieces 21 are integrated into one body, so as to realize the integrated modular structure and facilitate the machining and assembly. It can be understood that the steel ring 23 is arranged at the periphery of the rotor base 22, so that the steel ring 23 and the rotor base 22 cooperatively form an installation groove structure, that is, the plurality of rotor pieces 21 are located in the installation groove structure and connected to the rotor base 22, and the steel ring 23 can be assembled in limited sliding with the stator base 11.

[0137] In an embodiment, as shown in Figure 2 , the outer wall of the stator base 11 is provided with a wear-resistant ring 114, and the steel ring 23 is in sliding abutment with the wear-resistant ring 114. It can be understood that the arrangement of the wear-resistant ring 114 helps to reduce the wear between the rotor mechanism 2 and the stator base 11 when the rotor mechanism 2 rotates relative to the stator base 11. Alternatively, the rotor base 22 is arranged in a disc shape, the steel ring 23 is arranged in a circular ring shape, and the stator base 11 is arranged in a cylindrical shape, so as to facilitate the stator base 11 to be inserted into the installation groove structure cooperatively formed by the steel ring 23 and the rotor base 22 at one end adjacent to the slot opening of the accommodating slot 111, so that the steel ring 23 is in sliding abutment with the outer wall of the stator base 11. Alternatively, the wear-resistant ring 114 is arranged on the outer wall of the stator base 11 adjacent to the slot opening of the accommodating slot 111. The wear-resistant ring 114 is made of rubber material or material with wear-resistant performance, which is not limited herein. The wear-resistant ring 114 can be optionally arranged in an annular shape.

[0138] In an embodiment, as shown in Figures 2 to 4 , the stator base 11 adjacent to the slot opening of the accommodating slot 111 is further provided with a wear-resistant block 115, and the rotor base 22 is in sliding abutment with the wear-resistant block 115. It can be understood that the arrangement of the wear-resistant block 115 helps to reduce the wear between the rotor mechanism 2 and the stator base 11 when the rotor mechanism 2 rotates relative to the stator base 11. Alternatively, the wear-resistant block 115 is arranged on the top end face of the stator base 11, so as to reduce the wear between the rotor base 22 and the top end face of the stator base 11.

[0139] Alternatively, the wear-resistant block 115 is made of rubber material or material with wear-resistant performance, which is not limited herein. Alternatively, the wear-resistant block 115 comprises a plurality of wear-resistant blocks 115, and the plurality of wear-resistant blocks 115 are arranged in a circumferential direction of the stator base 11.

[0140] In an embodiment, each rotor piece 21 comprises a rotor 211, a yoke assembly 212 and a connecting row 213, wherein the rotor 211 is provided with a live contact surface, one end of the yoke assembly 212 is connected to a side of the rotor 211 away from the live contact surface, the other end of the yoke assembly 212 is connected to the rotor base 22, one end of the connecting row 213 is connected to the rotor 211 through a copper wire soft connection, and the other end of the connecting row 213 penetrates through the rotor base 22 for connecting a cable.

[0141] In the embodiment, as shown in Figure 9 , Figure 11 and Figure 12 , the rotor 211 of the rotor piece 21 can be selected as a circular ring structure, so that the rotors 211 of the plurality of rotor pieces 21 are arranged as concentric circles with different diameters. The rotor 211 of the rotor piece 21 can be connected to the rotor base 22 through the yoke assembly 212, thereby improving the connection stability of the rotor piece 21 and the rotor base 22.

[0142] In order to further improve the connection stability of the rotor 211 and the rotor base 22, as shown in Figure 12 , the yoke assembly 212 comprises a plurality of yoke assemblies 212, and the plurality of yoke assemblies 212 are arranged at intervals along the circumference of the rotor 211. In the embodiment, as shown in Figure 9 , a protruding portion 2111 is protrudingly arranged on a side of the rotor 211 away from the yoke assembly 212, and a live contact surface is formed on a side of the protruding portion 2111 away from the rotor piece 21, so that the protruding portion 2111 can be conveniently extended into the sliding groove 1325 and dynamically abut against the spring contact finger 133.

[0143] It can be understood that the width of the second gap formed between the two adjacent rotors 211 can be selected as 15mm-60mm. Alternatively, the width of the second gap is 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, etc., which is not limited herein. In this way, on the one hand, the distance between the cables can be increased to facilitate installation, and on the other hand, the two-pole breakdown can be prevented.

[0144] In the embodiment, the connection between the connecting row 213 and the rotor 211 is a copper wire soft connection, which is conducive to current transmission and provides a certain axial movement space for the rotor 211, thereby increasing the spatial adaptability of the mechanism. Alternatively, each rotor 211 is connected to a plurality of connecting rows 213, and the plurality of connecting rows 213 are arranged at intervals along the circumference of the rotor 211.

[0145] Optionally, the plurality of connection rows 213 of the plurality of rotors 211 are arranged in a spiral shape in the radial direction, that is, the plurality of connection rows 213 of the plurality of rotors 211 are arranged in a non-coincidence in the radial direction, from the outermost rotor 211 to the innermost rotor 211, the plurality of connection rows 213 are arranged in a spiral shape in the circumferential direction, so that the plurality of rotors 211 arranged in a concentric structure can not only increase the distance between the cables, but also facilitate installation, and can also prevent two-pole breakdown.

[0146] In an embodiment, as shown in Figure 12 The rotor seat 22 is provided with a through hole 221 corresponding to the connection row 213, and the connection row 213 includes a wire row 2131, a female row 2132, and a fixing block 2133. One end of the wire row 2131 is connected to one side of the rotor seat 22 facing the rotor 211 through the fixing block 2133, the female row 2132 is sleeved on the outside of the wire row 2131, and the other end of the wire row 2131 passes through the through hole 221 and is connected with the cable. It can be understood that the female row 2132 is sleeved on the connection row 213, and the female row 2132 can be made of insulating material, so that the sleeve of the insulating material can avoid current breakdown and increase the insulation strength of the structure. The number of connection rows 213 on the plurality of rotors 211 can be the same or different, which is not limited here.

[0147] In an embodiment, as shown in Figure 12 The fork assembly 212 includes a fork seat 2121, a fork rod 2122, a fork sleeve 2123, and a compression spring 2124. The fork seat 2121 is connected to one side of the rotor 211 away from the live surface, the fork rod 2122 is sleeved on the fork seat 2121, the compression spring 2124 is installed between the fork seat 2121 and the fork rod 2122, the fork sleeve 2123 is sleeved on the fork rod 2122, and one end of the fork rod 2122 away from the fork seat 2121 is connected with the rotor seat 22.

[0148] In the embodiment, the number of fork assemblies 212 on each rotor 211 can be specifically set according to the diameter of the rotor 211, and the number of fork assemblies 212 on the plurality of rotors 211 can be the same or different, which is not limited here. It can be understood that by setting the fork assembly 212 as the fork seat 2121, the fork rod 2122, the fork sleeve 2123, and the compression spring 2124 structure, the stable connection between the rotor 211 and the rotor seat 22 can be realized, and the torque between the rotor seat 22 and the rotor 211 can be transmitted to drive rotation. At the same time, the compression spring 2124 also provides a compression force to ensure the close fit between the rotor 211 and the stator member 131.

[0149] In the related art, for example, CN111682383A discloses a conductive slip ring, which discloses a slip ring structure specially used for improving the wear between the brush wire and the sliding groove. The structure changes the contact surface of each brush and the corresponding conductive sliding groove through an adjusting mechanism to improve the service life of the conductive slip ring, but such structure is not stable enough, and the creepage distance is small, and in a large current environment such as wind power, the two poles are easy to break down.

[0150] In an embodiment, the rotor mechanism 2 further comprises a separation assembly 24, the separation assembly 24 comprising a mounting block 241 and a plurality of spacer plates 244, wherein the mounting block 241 is connected to the rotor base 22, and the plurality of spacer plates 244 are arranged in a concentric circle and are respectively connected to the mounting block 241, and each spacer plate 244 is located in a second gap.

[0151] In this embodiment, as shown in Figure 11 and Figure 13 , by providing the separation assembly 24, the spacer plates 244 of the separation assembly 24 separate the corresponding two rotors 211 and the adjacent two stator members 131, thereby increasing the creepage distance between each phase and preventing current breakdown. It can be understood that the separation assembly 24 is fixedly connected to the rotor base 22 through the mounting block 241, which improves the installation stability of the separation assembly 24, and facilitates the fixation of the plurality of spacer plates 244 through the mounting block 241, and makes the plurality of spacer plates 244 arranged in a concentric circle.

[0152] It can be understood that each spacer plate 244 is located in a second gap, and when the rotor mechanism 2 is rotationally connected to the stator base 11, each spacer plate 244 is sequentially arranged in the second gap and the first gap 1324. That is, each spacer plate 244 is located between the adjacent two rotor members 21 and the adjacent two stator members 131.

[0153] In this embodiment, as shown in Figure 13 , the mounting block 241 comprises a plurality of mounting blocks 241, and the plurality of mounting blocks 241 are arranged in a circumferential direction of the spacer plate 244. It can be understood that the mounting block 241 comprises a mounting portion 242 and a protruding portion 243 protruding from the mounting portion 242, the protruding portion 243 is connected to the rotor base 22, and the mounting portion 242 extends in a radial direction and is connected to the plurality of spacer plates 244.

[0154] In order to facilitate the connection and fixation of the spacer plate 244 and the mounting block 241, as shown in Figure 13 , each spacer plate 244 comprises a cylindrical portion 245 and a plurality of lug portions 246, the cylindrical portion 245 is a cylinder with both ends open, and the plurality of lug portions 246 are arranged in a spaced manner at one end of the cylindrical portion 245, each lug portion 246 is provided with a mounting groove, and part of the mounting block 241 is located in the mounting groove. Alternatively, the plurality of lug portions 246 of the plurality of spacer plates 244 are arranged in a corresponding manner in the radial direction.

[0155] In an embodiment, as shown in Figure 1 and Figure 11 , the rotor mechanism 2 further comprises an oil drain 25 connected to the rotor base 22 and corresponding to the stator assembly 13, and an oil injector 26 connected to the oil drain 25 at an end away from the rotor base 22, the oil injector 26 being used to supply lubricating grease to the stator assembly 13. It can be understood that by providing the oil drain 25 and the oil injector 26, the oil injector 26 can accurately and stably supply lubricating oil through the pipeline, thereby ensuring the stability of the current collecting device 100.

[0156] In an embodiment, the current collecting device 100 further comprises a weak current slip ring 3, the rotor mechanism 2 is provided with a first through hole 222, the stator mechanism 1 is provided with a second through hole 116 corresponding to the first through hole 222, the second through hole 116 sequentially penetrates the stator assembly 13 and the stator base 11, and the weak current slip ring 3 is sequentially arranged in the first through hole 222 and the second through hole 116.

[0157] In the embodiment, as shown in Figures 1 to 4 , Figure 11 and Figure 14 , the weak current slip ring 3 is arranged at the center of the entire current collecting device 100. When the current collecting device 100 is installed on the wind turbine generator set, the weak current slip ring 3 is used for the interaction of power transmission and control signals between the top of the wind tower and the base.

[0158] In an embodiment, the stator mechanism 1 further comprises a plurality of pressing hooks 117 arranged on the outer wall of the stator base 11, each pressing hook 117 is provided with a ball bearing, and when the rotor mechanism 2 rotates and abuts against the stator base 11, the pressing hook 117 is used to lock the rotor mechanism 2, and the ball bearing rolls against the side of the rotor mechanism 2 away from the stator base 11.

[0159] In the embodiment, as shown in Figures 1 to 4 , by arranging the pressing hooks 117 on the outer wall of the stator base 11, the pressing hooks 117 are used to lock and limit the rotor mechanism 2, so that the stator mechanism 1 axially limits the rotor mechanism 2 through the pressing hooks 117. It can be understood that by arranging the ball bearings on the pressing hooks 117, the ball bearings roll against the rotor base 22 / steel ring 23 of the rotor mechanism 2, which can not only achieve limiting installation, but also reduce wear.

[0160] It can be understood that a plurality of pressing hooks 117 are arranged on the stator base 11 to provide axial positioning of the rotor base 22 / steel ring 23 and prevent the rotor from disengaging. The ball bearings on the pressing hooks 117 are in contact with the rotor base 22 to reduce friction caused by the circumferential movement. This structure can achieve quick pressing, reliable contact, and convenient disassembly, which is conducive to maintenance.

[0161] The current collecting device 100 of the present application can be applied to the fan yawing, which has a slow rotor rotating speed and needs to bear high current, and has a stable and simple structure. The current collecting device 100 can complete the dynamic current transmission between the rotating part driven by the fan yawing and the static conductor fixed in the fan tower under the large current condition of wind power generation through the combination of the rotor mechanism 2, the stator mechanism 1, the weak current slip ring 3 and the cable seat 151. The safety performance of the large current conductive slip ring is improved by setting the stator assembly 13 and the rotor 21 as a concentric circle structure and adding the partition assembly 24 and other partition plate structures. At the same time, the stability and service life of the conductive slip ring are improved through the ball bearing of the pressing hook 117, the compression spring 2124 of the pull fork assembly 212 and other structures.

[0162] The present application also provides a wind turbine generator, which comprises a tower, a nacelle and the current collecting device 100. The specific structure of the current collecting device 100 is referred to the foregoing embodiments. Since the wind turbine generator adopts all the technical solutions of the foregoing embodiments, it has at least all the beneficial effects brought by the technical solutions of the foregoing embodiments, which will not be repeated here.

[0163] In the present embodiment, the nacelle is rotationally connected with the tower, the nacelle is provided with a generator, the rotor mechanism 2 of the current collecting device 100 is arranged in the nacelle and connected with the generator, and the stator mechanism 1 of the current collecting device 100 is connected with the tower. It can be understood that the end of the tower away from the nacelle is fixed to the ground, and the nacelle is provided with a plurality of blades, so that the blades of the nacelle are rotated by wind force in the high altitude to drive the rotor mechanism 2 of the current collecting device 100 to rotate relative to the stator mechanism 1.

[0164] The above is only the optional embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation made according to the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A current collecting device applied to a wind turbine generator system, characterized in that, The current collecting device comprises: A stator mechanism comprising a stator base, a support column and a stator assembly, the stator base is provided with a receiving groove, the stator assembly is arranged in the receiving groove through the support column, the stator assembly and the stator base form a heat dissipation space, the support column is provided with an umbrella skirt, and the side of the stator assembly away from the support column is provided with a conductive surface; and A rotor mechanism provided with a conductive surface, the rotor mechanism is rotationally connected with the stator base, so that the conductive surface and the conductive surface are in contact and conductive; Wherein, the umbrella skirt comprises a fixed part and a heat dissipation part connected with each other, the support column is arranged through the fixed part and the heat dissipation part, the cross-sectional area of the heat dissipation part perpendicular to the extension direction of the support column is greater than that of the fixed part, the stator base is further provided with an air inlet and an air outlet communicating with the heat dissipation space, and the stator mechanism further comprises a fan, which is arranged at the air inlet and / or the air outlet.

2. The current collecting device of claim 1, wherein The fixed part and the heat dissipation part are integrally formed; And / or, the heat dissipation part is connected to the end of the fixed part away from the stator assembly, and the cross-sectional area of the heat dissipation part gradually increases from the fixed part to the end away from the fixed part; And / or, the umbrella skirt is located in the middle of the support column; And / or, the support column and the stator assembly are detachably connected; And / or, the support column and the bottom wall of the receiving groove are detachably connected.

3. The current collecting device of claim 1, wherein The stator mechanism further comprises a check valve arranged at the air outlet; And / or, the stator mechanism further comprises a filter screen arranged at the air inlet and / or the air outlet; And / or, the stator mechanism further comprises a louver arranged at the air inlet and / or the air outlet.

4. The current collecting device of claim 1, wherein The stator assembly comprises a plurality of stator pieces, a plurality of the stator pieces are arranged in concentric circles, a first gap is formed between adjacent two stator pieces, each stator piece is connected with the stator base through the support column, and each stator piece is provided with the conductive surface; The rotor mechanism comprises a plurality of rotor pieces, a plurality of the rotor pieces are arranged in concentric circles, a second gap is formed between adjacent two rotor pieces, each rotor piece is provided with the conductive surface, and each rotor piece is correspondingly arranged with a stator piece, so that each conductive surface and a conductive surface are in contact and conductive.

5. The current collecting device according to claim 4, wherein The width of the first gap is 15mm-60mm; And / or, the projection of the umbrella skirt on the bottom wall of the receiving groove partially overlaps with the projection of the first gap on the bottom wall of the receiving groove; And / or, each stator piece is connected with the stator base through a plurality of support columns, and the plurality of support columns are arranged in the circumferential direction of the stator piece.

6. The current collecting device of claim 4, wherein Each stator piece comprises: A stator arranged in a ring shape, the stator is connected with the support column, and the side of the stator away from the support column is provided with a sliding groove; and A spring contact finger arranged in the sliding groove, the side of the spring contact finger away from the bottom wall of the sliding groove forms the conductive surface; Each of the rotor members is provided with a protrusion, a side of the protrusion away from the rotor member forms the electric contact surface, and part of the protrusion extends into the sliding groove so that the protrusion abuts against the spring contact finger.

7. The current collecting device of claim 6, wherein A bottom wall of the sliding groove is concavely provided with a groove, the spring contact finger is contained and limited in the groove, and part of the spring contact finger protrudes from a slot of the groove.

8. The current collecting device of claim 7, wherein The spring contact finger comprises a plurality of contact finger portions and a plurality of connecting portions, the plurality of contact finger portions and the plurality of connecting portions are alternately connected and form a ring shape, a side of each of the contact finger portions away from the bottom wall of the sliding groove forms the electric contact surface, the groove comprises a plurality of first groove segments and a plurality of second groove segments, the plurality of first groove segments and the plurality of second groove segments are alternately arranged and communicate with each other, each of the contact finger portions is contained in one of the first groove segments, and part of the contact finger portions protrude from the slot of the first groove segment, each of the connecting portions is contained in one of the second groove segments; Furthermore, each of the stator members further comprises a lubricating grease, and the lubricating grease is contained in the groove.

9. The current collecting device of claim 6, wherein Each of the stator members further comprises a copper bar and a temperature sensor, one end of the copper bar is connected to the stator, the other end of the copper bar penetrates through the bottom wall of the containing groove, the temperature sensor is arranged on a side of the stator seat away from the rotor member and abuts against one end of the copper bar extending out of the containing groove.

10. The current collecting device of claim 9, wherein The stator mechanism further comprises a cable seat and a cable, the cable seat is connected to one end of the stator seat away from the rotor mechanism, one end of the cable is connected to the copper bar, and the other end of the cable is fixed to the cable seat; Furthermore, each of the stator members further comprises a plurality of copper bars, and the plurality of copper bars are arranged at intervals along the circumferential direction of the stator.

11. The current collecting device of claim 4, wherein The rotor mechanism further comprises: a rotor seat, the rotor seat is rotationally connected to the stator seat and covers the slot of the containing groove, and a plurality of rotor members are connected to the rotor seat and contained in the containing groove; and a steel ring, the steel ring is arranged on the periphery of the rotor seat and slidably abuts against the outer wall of the stator seat.

12. The current collecting device of claim 11, wherein Each of the rotor members comprises: a rotor, the rotor is provided with the electric contact surface; a yoke assembly, one end of the yoke assembly is connected to a side of the rotor away from the electric contact surface, and the other end of the yoke assembly is connected to the rotor seat; and a connecting bar, one end of the connecting bar is connected to the rotor through a copper bar wire, and the other end of the connecting bar penetrates through the rotor seat for connecting a cable.

13. The current collecting device of claim 12, wherein The yoke assembly comprises a yoke seat, a yoke rod, a yoke sleeve and a compression spring, the yoke seat is connected to a side of the rotor away from the electric contact surface, the yoke rod is sleeved on the yoke seat, the compression spring is arranged between the yoke seat and the yoke rod, the yoke sleeve is sleeved on the yoke rod, and one end of the yoke rod away from the yoke seat is connected to the rotor seat.

14. The current collecting device of claim 12, wherein The outer wall of the stator seat is provided with a wear-resistant ring, and the steel ring slidably abuts against the wear-resistant ring; Furthermore, the stator seat is further provided with a wear-resistant block adjacent to the slot of the containing groove, and the rotor seat slidably abuts against the wear-resistant block; And / or, the plurality of the fork assemblies are arranged along a circumferential direction of the rotor; And / or, each of the rotor is connected with a plurality of the connection rows, and the plurality of the connection rows are arranged along a circumferential direction of the rotor; And / or, the plurality of the connection rows of the plurality of the rotors are arranged in a spiral shape along a radial direction; And / or, the rotor seat is provided with a through hole corresponding to the connection row, the connection row comprises a wire row, a busbar and a fixing block, one end of the wire row is connected to a side of the rotor seat facing the rotor through the fixing block, the busbar is sleeved outside the wire row, and the other end of the wire row passes through the through hole and is connected with the cable.

15. The current collecting device of claim 11, wherein The rotor mechanism further comprises a separation assembly, the separation assembly comprises: a mounting block connected to the rotor seat; and a plurality of spacing plates arranged in a concentric circle and connected to the mounting block respectively, each of the spacing plates is located in one of the second gaps.

16. The current collecting device of claim 15, wherein The mounting block comprises a plurality of mounting blocks arranged along a circumferential direction of the spacing plate; And / or, the mounting block comprises a mounting portion and a protruding portion protruding from the mounting portion, the protruding portion is connected to the rotor seat, and the mounting portion extends along a radial direction and is connected to a plurality of the spacing plates respectively; And / or, each of the spacing plates comprises a cylindrical portion and a plurality of lug portions, the cylindrical portion is in a cylindrical shape with both ends open, a plurality of lug portions are arranged in a spaced manner at one end of the cylindrical portion, each of the lug portions is provided with a mounting groove, and part of the mounting blocks are located in the mounting groove.

17. The current collection device of claim 11, wherein, The rotor mechanism further comprises an oil row and an oil injector, the oil row is connected to the rotor seat and is arranged corresponding to the stator assembly, the oil injector is connected to one end of the oil row away from the rotor seat, and the oil injector is used to supply lubricating grease to the stator assembly.

18. The current collection device of any one of claims 1 to 17, wherein, The current collecting device further comprises a weak current slip ring, the rotor mechanism is provided with a first through hole, the stator mechanism is provided with a second through hole corresponding to the first through hole, the second through hole passes through the stator assembly and the stator seat in sequence, and the weak current slip ring is arranged in the first through hole and the second through hole in sequence.

19. A wind power unit, characterized in that The wind turbine generator set comprises: a tower; a nacelle connected to the tower in rotation, the nacelle is provided with a generator; and The current collecting device according to any one of claims 1 to 18, the rotor mechanism of the current collecting device is arranged in the nacelle and connected to the generator, and the stator mechanism of the current collecting device is connected to the tower.

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