Current collector and wind turbine generator system

Abstract

The application discloses a current collecting device and a wind turbine generator unit. The current collecting device comprises a stator mechanism and a rotor mechanism. The stator mechanism is provided with a containing groove, and the containing groove is provided with a conductive surface. The rotor mechanism comprises a rotor base and a rotor assembly. The rotor base is provided with a mounting cavity, and the rotor assembly is arranged in the mounting cavity and forms a heat dissipation air duct together with the rotor base. The rotor assembly is provided with a contact surface. The rotor mechanism is covered on the slot opening of the containing groove and is rotationally connected with the stator mechanism, so that the contact surface is in abutment with the conductive surface. 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 applying the same. BACKGROUND

[0002] In order to maximize the power generation efficiency, the wind turbine needs to continuously yaw to align with the wind direction, so the nacelle rotates relative to the tower. At this time, the current needs to be dynamically transmitted between the rotating part and the fixed part through the current collecting ring structure.

[0003] At present, the current collecting ring structure is mainly realized by the relative rotation of the conductive medium, such as the rotation of the carbon brush and the metal or the rotation of the carbon brush and the carbon brush. However, due to the long-time rotation of the wind turbine, the two conductive media in contact with each other generate a lot of heat due to long-time friction, and the large current passes through, which reduces the overall safety and reliability of the current collecting ring structure. In the related art, a special cooling device is provided to cool and cool the current collecting ring structure. However, the cooling device makes the overall structure of the current collecting ring complex and difficult to install and maintain. SUMMARY

[0004] The main purpose of the present application is to provide a current collecting device and a wind turbine generator system, 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 system, which comprises:

[0006] a stator mechanism provided with a containing groove, and an electrically conductive surface arranged in the containing groove; and

[0007] a rotor mechanism comprising a rotor seat and a rotor assembly, the rotor seat is provided with a mounting cavity, the rotor assembly is arranged in the mounting cavity and forms a heat dissipation air duct together with the rotor seat, the rotor assembly is provided with an electrically conductive surface, and the rotor mechanism is connected with the stator mechanism in rotation to make the electrically conductive surface and the electrically conductive surface abut and conduct.

[0008] In an embodiment, the rotor seat is further provided with an air inlet and an air outlet communicating with the heat dissipation air duct, and the rotor mechanism further comprises a fan arranged at the air inlet and / or the air outlet.

[0009] In an embodiment, the rotor mechanism further comprises a check valve arranged at the air outlet;

[0010] In an embodiment, the rotor mechanism further comprises a filter screen arranged at the air inlet and / or the air outlet;

[0011] In an embodiment, the rotor mechanism further comprises a louver arranged at the air inlet and / or the air outlet;

[0012] In an embodiment, the rotor base comprises a rotating disc and a steel ring arranged at the periphery of the rotating disc and enclosing the mounting cavity with the rotating disc, the steel ring is provided with the air inlet and the air outlet communicating with the mounting cavity, the rotating disc cover is arranged at the slot of the accommodating groove, and the steel ring is in sliding abutment with the outer wall of the stator mechanism, the rotor assembly is connected with the rotating disc and encloses the heat dissipation air duct with the rotating disc and the steel ring.

[0013] In an embodiment, the rotor assembly comprises a plurality of rotor pieces arranged in concentric circles in the mounting cavity, a first gap communicating with the heat dissipation air duct is formed between adjacent two rotor pieces, and each rotor piece is provided with the electrically conductive surface;

[0014] The stator mechanism comprises a stator base and a plurality of stator pieces, the stator base is provided with the accommodating groove, and the plurality of stator pieces are arranged in concentric circles in the accommodating groove, a second gap is formed between adjacent two stator pieces, and each stator piece is provided with the electrically conductive surface;

[0015] The rotor base cover is arranged at the slot of the accommodating groove and is rotatably connected with the stator base, so that each rotor piece is arranged in correspondence with one stator piece, and each electrically conductive surface is in abutment and conduction with one electrically conductive surface.

[0016] In an embodiment, each rotor piece comprises:

[0017] a rotor provided with the electrically conductive surface;

[0018] a pull fork assembly, one end of the pull fork assembly is connected with the side of the rotor away from the electrically conductive surface, and the other end of the pull fork assembly is connected with the rotor base; and

[0019] a connection row, one end of the connection row is connected to the rotor through a copper wire, and the other end of the connection row penetrates the rotor base for connecting a cable.

[0020] In an embodiment, the yoke assembly comprises a yoke base, a yoke rod, a yoke sleeve and a compression spring, the yoke base is connected to a side of the rotor away from the live surface, the yoke rod is sleeved on the yoke base, the compression spring is installed between the yoke base and the yoke rod, the yoke sleeve is sleeved on the yoke rod, and an end of the yoke rod away from the yoke base is connected to the rotor base.

[0021] In an embodiment, an outer wall of the stator base is provided with a wear-resistant ring, and the rotor base is in sliding abutment with the wear-resistant ring.

[0022] In an embodiment, the stator base is further provided with a wear-resistant block adjacent to the slot opening of the accommodating groove, and the rotor base is in sliding abutment with the wear-resistant block.

[0023] In an embodiment, the yoke assembly comprises a plurality of yoke assemblies, and the plurality of yoke assemblies are arranged at intervals in the circumferential direction of the rotor.

[0024] In an embodiment, each rotor is connected to a plurality of connection rows, and the plurality of connection rows are arranged at intervals in the circumferential direction of the rotor.

[0025] In an embodiment, the plurality of connection rows of the plurality of rotors are arranged in a spiral shape in the radial direction.

[0026] In an embodiment, the rotor base 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 base facing the rotor through the fixing block, the busbar is sleeved on the outside of the wire row, the other end of the wire row passes through the through hole and is connected to the cable.

[0027] In an embodiment, the rotor mechanism further comprises a separation assembly arranged in the mounting cavity, the separation assembly comprises:

[0028] a mounting block connected to the rotor base; and

[0029] a plurality of spacer plates arranged at intervals in concentric circles and connected to the mounting block respectively, each spacer plate is located in a first gap, so that two adjacent rotor members are located on two sides of the spacer plate.

[0030] In an embodiment, the mounting block comprises a plurality of mounting blocks arranged at intervals in the circumferential direction of the spacer plate.

[0031] In an embodiment, the mounting block comprises a mounting portion and a protruding portion protruding from the mounting portion, the protruding portion is connected to the rotor base, and the mounting portion extends in the radial direction and is connected to a plurality of spacer plates respectively.

[0032] And / or, each of the interval plates comprises a cylindrical part and a plurality of lug parts, the cylindrical part is in the shape of an open-ended cylinder, the plurality of lug parts are spaced and protrude from one end of the cylindrical part, each of the lug parts is provided with a mounting groove, part of the mounting blocks are limited in the mounting groove, and a through air channel connecting the heat dissipation channels is formed between two adjacent lug parts;

[0033] And / or, the rotor mechanism further comprises an oil discharge and an oil injector, the oil discharge is connected to the rotor base, the oil injector is connected to one end of the oil discharge away from the rotor base, and the oil injector is used to supply lubricating grease to the rotor member.

[0034] In an embodiment, the stator mechanism further comprises a support column, and the plurality of stator members are connected to the stator base through the support column and enclosed with the stator base to form a heat dissipation space connected to the second gap, and the stator member is provided with the conductive surface on the side away from the support column.

[0035] In an embodiment, each of the stator members comprises:

[0036] a stator arranged in a ring shape, the stator is arranged in the accommodation groove through the support column, and the stator is provided with a sliding groove on the side away from the support column; and

[0037] a spring contact finger arranged in the sliding groove, the spring contact finger forms the conductive surface on the side away from the bottom wall of the sliding groove;

[0038] wherein each of the rotor members is provided with a protruding part, the protruding part forms the contact surface on the side away from the rotor member, and part of the protruding part extends into the sliding groove so that the protruding part abuts against the spring contact finger.

[0039] In an embodiment, the bottom wall of the sliding groove is concave to form a groove, the spring contact finger is accommodated and limited in the groove, and part of the spring contact finger protrudes from the groove.

[0040] In an embodiment, the spring contact finger comprises a plurality of contact finger parts and a plurality of connecting parts, the plurality of contact finger parts and the plurality of connecting parts are alternately connected and form a ring shape, each of the contact finger parts forms the conductive surface on the side away from the bottom wall of the sliding groove, 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 connected to each other, each of the contact finger parts is accommodated in a first groove segment, and part of the contact finger parts protrude from the groove of the first groove segment, and each of the connecting parts is accommodated in a second groove segment.

[0041] And / or, each of the stator members further comprises lubricating grease, and the lubricating grease is accommodated in the groove.

[0042] and / or, the width of the first gap is 15mm-60mm;

[0043] and / or, the width of the second gap is 15mm-60mm;

[0044] and / or, the support column is detachably connected with the stator;

[0045] and / or, the support column is detachably connected with the bottom wall of the accommodating groove.

[0046] In an embodiment, each of the stator members further comprises a copper bar and a temperature sensor, one end of the copper bar is connected with the stator, the other end of the copper bar penetrates through the bottom wall of the accommodating groove, the temperature sensor is arranged on the side of the stator seat away from the rotor member, and is close to the end of the copper bar extending out of the accommodating groove.

[0047] In an embodiment, the stator mechanism further comprises a cable seat and a cable, the cable seat is connected with the end of the stator seat away from the rotor seat, one end of the cable is connected with the copper bar, and the other end of the cable is fixed to the cable seat;

[0048] and / or, each of the stator members further comprises a plurality of the copper bars, and the plurality of the copper bars are arranged at intervals along the circumferential direction of the stator.

[0049] In an embodiment, the current collecting device further comprises a locking assembly, the locking assembly is connected with the outer wall of the rotor seat, one end of the locking assembly is provided with a rolling member, and the rotor seat is detachably covered on the slot of the accommodating groove and rotationally connected with the stator mechanism;

[0050] wherein, the current collecting device has a locking state in which the locking assembly locks the stator mechanism, and a release state in which the locking assembly releases the stator mechanism;

[0051] In the locking state, the rolling member rolls against the stator mechanism;

[0052] In the release state, the rolling member is away from the stator mechanism.

[0053] In an embodiment, the locking assembly comprises:

[0054] a fixing member connected with the outer wall of the rotor seat;

[0055] a locking member movably connected with the fixing member, one end of the locking member is provided with the rolling member; and

[0056] an adjusting member rotationally connected with the locking member and rotationally connected with the fixing member;

[0057] The adjusting member drives the locking member to lock or release the stator mechanism, so that the rolling member rolls against or away from the stator mechanism.

[0058] In an embodiment, the locking assembly includes a plurality of locking assemblies, and the plurality of locking assemblies are arranged along the circumferential direction of the outer wall of the rotor base.

[0059] The application further provides a wind turbine generator, which comprises:

[0060] A tower tube;

[0061] A machine cabin, which is rotationally connected with the tower tube, and is provided with a generator; and

[0062] The rotor mechanism of the current collection device is arranged in the machine cabin and connected with the generator, and the stator mechanism of the current collection device is connected with the tower tube.

[0063] The current collection device of the technical scheme of the application is provided with a receiving groove in the stator mechanism, and is provided with a conductive surface in the receiving groove, and the rotor mechanism is provided with a rotor base and a rotor assembly, so that the rotor assembly is fixed by the installation cavity of the rotor base, and the rotor assembly is provided with a contact surface, the rotor base of the rotor mechanism is covered on the slot of the receiving groove of the stator mechanism, and the rotor mechanism is rotationally connected with the stator mechanism, at this time, the contact surface of the rotor assembly is in abutting conduction with the conductive surface in the receiving groove, so that the contact surface of the rotor assembly is always in abutting conduction with the conductive surface in the receiving groove when the rotor mechanism rotates or rotates relative to the stator mechanism, thereby realizing dynamic transmission of electric power from the rotor mechanism to the stator mechanism. At the same time, the rotor assembly is arranged in the installation cavity of the rotor base, and a heat dissipation air duct is formed by surrounding the rotor base, so that the rotor assembly is cooled by the heat dissipation air duct, thereby effectively improving the heat dissipation capacity of the current collection device. It can be understood that the current collection device of the application not only improves the heat dissipation capacity and stability, but also does not need to be provided with a separate cooling device, greatly simplifies the structure of the whole current collection device, improves the safety performance of the large-current current collection ring, and is convenient for later maintenance and maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0064] In order to more clearly illustrate the technical schemes in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and those skilled in the art can obtain other drawings from the structures shown in the drawings without creating any creative labor.

[0065] Figure 1 It is an embodiment of the current collection device of the application.

[0066] Figure 2 Fig. 3 is a structural schematic diagram of a rotor mechanism in an embodiment of the present application;

[0067] Figure 3 Fig. 4 is a structural schematic diagram of a rotor in an embodiment of the present application;

[0068] Figure 4 Fig. 5 is a structural schematic diagram of a partition assembly in an embodiment of the present application;

[0069] Figure 5 Fig. 6 is a structural schematic diagram of a stator mechanism in an embodiment of the present application;

[0070] Figure 6 Fig. 7 is a top structural schematic diagram of a stator mechanism in an embodiment of the present application;

[0071] Figure 7 Fig. 8 is a partial sectional schematic diagram of a stator mechanism in an embodiment of the present application;

[0072] Figure 8 Fig. 9 is a structural schematic diagram of a stator in an embodiment of the present application;

[0073] Figure 9 Fig. 10 is a top structural schematic diagram of a stator in an embodiment of the present application;

[0074] Figure 10 Fig. 11 is a partial sectional schematic diagram of a rotor and a stator in an embodiment of the present application;

[0075] Figure 11 Fig. 12 is a structural schematic diagram of a locking assembly in an embodiment of the present application.

[0076] BRIEF DESCRIPTION OF THE DRAWINGS

[0077]

[0078]

[0079] 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

[0080] The technical solutions in the embodiments of the present application will be described clearly and completely 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.

[0081] It should be noted that all the direction 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 components in a certain posture (as shown in the drawings), and if the certain posture changes, the direction indications will also change accordingly.

[0082] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B schemes are satisfied at the same time.

[0083] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. 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 each embodiment can be combined with each other, but it must be based on the realization of a person 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.

[0084] In order to maximize the power generation efficiency, the wind turbine needs to continuously yaw to align with the wind direction, so the wind turbine nacelle will rotate relative to the tower, and at this time, it is necessary to connect the rotating wind turbine nacelle and the fixed tower. During the operation of the wind turbine, due to the change of wind direction, the wind turbine needs to yaw to maximize the use of wind energy for power generation, at this time, under the condition that the rotating part circuit and the fixed part circuit are connected, the dynamic transmission of current is realized through the current collection ring structure.

[0085] At present, the current collection ring structure is mainly realized by the relative rotation of the conductive medium that abuts each other, such as the rotation of carbon brush and metal abutting or the rotation of carbon brush and carbon brush abutting, to realize the dynamic transmission of current, but often due to the long-time rotation operation of the wind turbine, the two conductive media abutting each other are rubbed for a long time to generate a lot of heat, and accompanied by the passage of large current, so that the overall safety and reliability of the current collection ring structure is reduced. In the related art, a special cooling device is arranged to cool and cool the current collection ring structure, but the arrangement of the cooling device makes the overall structure of the current collection ring complex, and the installation and maintenance are difficult.

[0086] Meanwhile, the current collecting ring structure applied to the fan is often complex in structure, large in size and high in maintenance cost, and the rotor mechanism and the stator mechanism of the current collecting ring structure cannot be axially positioned and are inconvenient to disassemble, resulting in difficult maintenance. In addition, in addition to the large current line output by the fan, there are numerous control lines and power transmission lines connected between the tower bottom and the tower top fan, and 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 being twisted off. Meanwhile, 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 use in large current conditions.

[0087] Based on the above problems, the application provides a current collecting device 100. It can be understood that the current collecting device 100 is used to transmit and collect the power generated by the generator in the wind turbine generator system, and the power transmission can be performed in a dynamic abutting manner. Dynamic abutting means that two relatively moving power transmission mechanisms still abut. Compared with the cooling device separately provided in the wind turbine in the prior art, the current collecting device 100 of the application is provided with a heat dissipation air duct inside the rotor mechanism 2. When the rotor mechanism 2 rotates or rotates relative to the stator mechanism 1, the electric contact surface and the conductive surface abut and contact to generate heat. Therefore, the heat dissipation air duct is used to dissipate the generated heat, effectively and quickly realizes heat dissipation, improves the heat dissipation effect, thereby improving the heat dissipation effect and stability of the current collecting device 100, simplifying the structure of the current collecting device 100, improving the safety performance of the large current current collecting ring, and facilitating the later maintenance and maintenance.

[0088] The current collecting device 100 of the application is suitable for the slow rotation speed of the fan yawing rotor and can withstand large current, is stable in structure, and provides a novel conductive slip ring structure with a long service life in such an extreme environment as the fan.

[0089] Please refer to Figures 1 to 10 In the embodiment of the application, the current collecting device 100 includes a stator mechanism 1 and a rotor mechanism 2. The stator mechanism 1 is provided with a containing groove 111, and the containing groove 111 is provided with a conductive surface. The rotor mechanism 2 includes a rotor seat 22 and a rotor assembly. The rotor seat 22 is provided with a mounting cavity, and the rotor assembly is arranged in the mounting cavity and forms a heat dissipation air duct together with the rotor seat 22. The rotor assembly is provided with an electric contact surface. The rotor mechanism 2 is covered on the slot opening of the containing groove 111 and is rotationally connected with the stator mechanism 1, so that the electric contact surface and the conductive surface abut and conduct.

[0090] In the embodiment, the current collecting device 100 is applied to a wind turbine generator set, the rotor mechanism 2 of the current collecting device 100 is connected to a yaw mechanism of the wind turbine through a cable and rotates with the yaw mechanism, and the stator mechanism 1 is fixedly connected to a tower of the wind turbine, so that the stator mechanism 1 is a stationary mechanism. The electrically conductive surface of the stator mechanism 1 is in contact with the electrically conductive surface of the rotor assembly in the rotor mechanism 2, so that the electrically conductive surface and the electrically conductive surface always remain in contact when the rotor mechanism 2 rotates relative to the stator mechanism 1, thereby realizing the electrical conduction between the rotor mechanism 2 and the stator mechanism 1.

[0091] It can be understood that the stator mechanism 1 is used to mount, support and fix the rotor mechanism 2 and the like, that is, the stator mechanism 1 provides a mounting basis for the rotor mechanism 2 and the like. In the embodiment, the stator mechanism 1 is provided with a receiving groove 111, which can be a recess structure or a through groove structure, which is not limited herein. Optionally, the receiving groove 111 of the stator mechanism 1 has a bottom wall and a side wall. The electrically conductive surface is arranged on the bottom wall of the receiving groove 111.

[0092] In the embodiment, when the rotor seat 22 of the rotor mechanism 2 covers the slot of the receiving groove 111, the rotor mechanism 2 is rotationally connected to the stator mechanism 1, at this time, part of the rotor assembly of the rotor mechanism 2 is accommodated in the receiving groove 111, so that the electrically conductive surface and the electrically conductive surface are in contact and conductive, thereby making the electrically conductive surface and the electrically conductive surface always in contact when the rotor mechanism 2 rotates relative to the stator mechanism 1, so that dynamic power transmission can be formed.

[0093] It can be understood that the rotor mechanism 2 and the stator mechanism 1 can be detachably connected, that is, the rotor mechanism 2 can be connected to the stator mechanism 1 or detached from the stator mechanism 1. When the rotor mechanism 2 is connected to the stator mechanism 1, the rotor mechanism 2 is rotationally connected to the stator mechanism 1, that is, the rotor mechanism 2 can rotate relative to the stator mechanism 1. Of course, in other embodiments, the rotor mechanism 2 and the stator mechanism 1 are not detachable, but the rotor mechanism 2 and the stator mechanism 1 are rotationally connected, which is not limited herein.

[0094] In the embodiment, by providing a mounting cavity in the rotor seat 22 of the rotor mechanism 2, when the rotor assembly is arranged in the mounting cavity, the rotor assembly and the rotor seat 22 form a heat dissipation air duct, so that the electrically conductive surface and the electrically conductive surface always remain in sliding contact when the rotor mechanism 2 rotates relative to the stator mechanism 1, thereby the heat generated can be dissipated through the heat dissipation air duct, so that the heat dissipation capacity of the current collecting device can be effectively improved.

[0095] Understandably, the rotor seat 22 is used to install, fix and protect the rotor assembly. The mounting cavity of the rotor seat 22 can be a groove structure or a concave cavity structure. One end of the rotor assembly extends into the mounting cavity of the rotor seat 22 and is fixed to the rotor seat 22. The other end of the rotor assembly is provided with a contact surface. Thus, when the rotor seat 22 covers the opening of the receiving groove 111, part of the rotor assembly is accommodated in the receiving groove 111 so that the contact surface and the conductive surface abut and conduct.

[0096] The current collector 100 of the present invention has a receiving groove 111 in the stator mechanism 1, and a conductive surface in the receiving groove 111. The rotor mechanism 2 is configured as a rotor seat 22 and a rotor assembly. The rotor assembly is installed and fixed in the mounting cavity of the rotor seat 22, and the rotor assembly has a contact surface. When the rotor seat 22 of the rotor mechanism 2 is closed to the opening of the receiving groove 111 of the stator mechanism 1 and rotated with the stator mechanism 1, the contact surface of the rotor assembly is in contact with the conductive surface in the receiving groove 111. Thus, when the rotor mechanism 2 rotates or rotates relative to the stator mechanism 1, the contact surface of the rotor assembly and the conductive surface in the receiving groove 111 are always in contact and connected, thereby realizing the dynamic transmission of power from the rotor mechanism 2 to the stator mechanism 1. At the same time, by setting the rotor assembly in the mounting cavity of the rotor seat 22 and forming a heat dissipation channel with the rotor seat 22, the heat dissipation channel is used to dissipate heat from the rotor assembly, thereby effectively improving the heat dissipation capacity of the current collector. Understandably, the current collector 100 of the present invention not only improves heat dissipation and stability, but also eliminates the need for a separate cooling device, greatly simplifies the overall structure of the current collector, improves the safety performance of the high-current collector ring, and facilitates later maintenance and upkeep.

[0097] In one embodiment, the rotor base 22 is further provided with an air inlet and an air outlet 224 that connect to the heat dissipation duct, and the rotor mechanism 2 also includes a fan, which is located at the air inlet and / or the air outlet 224.

[0098] In this embodiment, as Figure 1 and Figure 2 As shown, by providing an air inlet and an air outlet 224 on the rotor base 22, it is convenient to introduce cool air into the heat dissipation duct through the air inlet and exhaust it through the air outlet 224, thereby providing a heat exchange effect and improving heat dissipation capacity. It is understandable that by setting a fan at the air inlet and / or air outlet 224, the fan can create a directional driving force on the airflow within the heat dissipation channel formed by the air inlet, the heat dissipation duct, and the air outlet 224, accelerating heat exchange and further improving the heat dissipation effect.

[0099] Understandably, the fan can be a centrifugal fan. The fan can optionally be located at the air outlet 224. Of course, in other embodiments, the fan can also be located at the air inlet. Alternatively, fans can be located at both the air inlet and air outlet 224; this is not limited here.

[0100] In an embodiment, as shown in Figure 1 and Figure 2 The rotor mechanism 2 further comprises a check valve, which is arranged at the air outlet 224. Thus, the check valve is used to make the air flow in the heat dissipation channel formed by the air inlet, the heat dissipation air duct and the air outlet 224 unidirectional.

[0101] In an embodiment, as shown in Figure 2 The rotor mechanism 2 further comprises a filter screen 243, which is arranged at the air inlet and / or the air outlet 224. It can be understood that, in this way, the heat dissipation of the current collector device 100 is achieved, and the filter screen 243 can also play a role in dust removal, which is helpful for the transmission of large current.

[0102] Optionally, the filter screen 243 is arranged at the air inlet. Of course, in other embodiments, the filter screen 243 can also be arranged at the air inlet. Alternatively, the filter screen 243 is arranged at both the air inlet and the air outlet 224, which is not limited herein. In this embodiment, the specific structure of the filter screen 243 can refer to the prior art, which is not described herein.

[0103] In an embodiment, as shown in Figure 2 The rotor mechanism 2 further comprises a louver 244, which is arranged at the air inlet and / or the air outlet 224. It can be understood that, in this way, the heat dissipation of the current collector device 100 is achieved, and the louver 244 can also play a role in dust removal, which is helpful for the transmission of large current.

[0104] It can be understood that the louver 244 is optionally arranged at the air inlet. Of course, in other embodiments, the louver 244 can also be arranged at the air inlet. Alternatively, the louver 244 is arranged at both the air inlet and the air outlet 224, which is not limited herein. In this embodiment, the specific structure of the louver 244 can refer to the prior art, which is not described herein.

[0105] In an embodiment, the rotor seat 22 comprises a rotating disc 221 and a steel ring 223, the steel ring 223 is arranged at the periphery of the rotating disc 221 and forms a mounting cavity together with the rotating disc 221, the steel ring 223 is provided with an air inlet and an air outlet 224 which communicate with the mounting cavity, the rotating disc 221 is arranged at the slot opening of the accommodating groove 111, and the steel ring 223 is in sliding abutment with the outer wall of the stator mechanism 1, the rotor assembly is connected with the rotating disc 221 and forms a heat dissipation air duct together with the rotating disc 221 and the steel ring 223.

[0106] In this embodiment, as shown in Figure 1 and Figure 2As shown, the rotating disc 221 of the rotor base 22 can be selected as a disc structure, and the steel ring 223 can be selected as a circular ring or a cylindrical structure. The steel ring 223 is arranged at the periphery of the rotating disc 221, so that the steel ring 223 and the rotating disc 221 form an installation cavity. It can be understood that one end of the rotor assembly extends into the installation cavity and is connected with the rotating disc 221, so that the rotor assembly can be integrated in the rotor base 22.

[0107] It can be understood that the rotating disc 221 of the rotor base 22 can be arranged on the slot opening of the accommodating groove 111 and rotationally abut the end face of the slot opening of the accommodating groove 111. The steel ring 223 is located outside the outer wall of the stator mechanism 1 and slidably abuts the outer wall of the stator mechanism 1. Thus, the rotor base 22 formed by the rotating disc 221 and the steel ring 223 can be limited and matched with the stator mechanism 1.

[0108] In an embodiment, the rotor assembly includes a plurality of rotor pieces 21, which are arranged in the installation cavity in a concentric circle and are spaced apart. A first gap communicating with the heat dissipation air duct is formed between adjacent two rotor pieces 21. Each rotor piece 21 is provided with an electrically conductive surface. The stator mechanism 1 includes a stator base 11 and a plurality of stator pieces 13. The stator base 11 is provided with an accommodating groove 111. The plurality of stator pieces 13 are arranged in the accommodating groove 111 in a concentric circle and are spaced apart. A second gap 134 is formed between adjacent two stator pieces 13. Each stator piece 13 is provided with an electrically conductive surface. The rotor base 22 covers the slot opening of the accommodating groove 111 and is rotationally connected with the stator base 11, so that each rotor piece 21 is arranged corresponding to each stator piece 13, and each electrically conductive surface is in abutment and conduction with one electrically conductive surface.

[0109] In the embodiment, as shown in Figure 2 and Figure 3 , the plurality of rotor pieces 21 of the rotor assembly are fixedly installed on the rotor base 22, that is, the plurality of rotor pieces 21 are integrated into one body, so as to realize an integrated modular structure and facilitate processing and assembly. It can be understood that the steel ring 223 is arranged at the periphery of the rotating disc 221, so that the steel ring 223 and the rotating disc 221 form the installation cavity. That is, the plurality of rotor pieces 21 are located in the installation cavity and are connected with the rotating disc 221. The steel ring 223 can be limited and slidably assembled with the stator base 11.

[0110] In the embodiment, as shown in Figure 1 , Figure 2 , Figure 3 , Figures 5 to 10As shown, the stator base 11 of the stator mechanism 1 is used to mount, support and fix the plurality of stator pieces 13, the rotor mechanism 2 and other components, that is, the stator base 11 provides a mounting basis for the plurality of stator pieces 13, the rotor mechanism 2 and other components. In this 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. The plurality of stator pieces 13 form a stator assembly.

[0111] In an embodiment, the stator mechanism 1 further comprises a support column 12, and the plurality of stator pieces 13 are connected to the stator base 11 through the support column 12 and enclosed with the stator base 11 to form a heat dissipation space 121 communicating with the second gap 134, and the plurality of stator pieces 13 are provided with a conductive surface on the side away from the support column 12.

[0112] In this embodiment, as shown, Figure 7 the receiving groove 111 of the stator base 11 has a bottom wall and a side wall, and the plurality of stator pieces 13 of the stator assembly are arranged in the receiving groove 111 through the support column 12, so that the plurality of stator pieces 13 and the stator base 11 enclose the heat dissipation space 121, and the conductive surface of the plurality of stator pieces 13 is located on the side of the plurality of stator pieces 13 away from the support column 12. It can be understood that the plurality of stator pieces 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 plurality of stator pieces 13 of the stator assembly and the bottom wall and the side wall of the receiving groove 111 of the stator base 11 enclose the heat dissipation space 121, so that the heat dissipation space 121 can be used to fully and effectively dissipate the heat generated by the stator assembly.

[0113] 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 to support the stator assembly, on the one hand to realize the mounting and fixing of the stator assembly, and on the other hand to facilitate the formation of the heat dissipation space 121, thereby improving the heat dissipation effect. In this embodiment, the side of the stator assembly 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 to the stator base 11 to make the contact surface and the conductive surface abut and conduct, 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 as to form dynamic power transmission.

[0114] In this embodiment, the heat dissipation air duct communicates with the heat dissipation space 121 through the first gap and the second gap 134, so that the heat dissipation air duct can be used to forcibly exchange the airflow in the heat dissipation space 121 through the first gap and the second gap 134, thereby fully and effectively dissipating the heat generated by the current collecting device 100.

[0115] The current collecting device 100 of the present application sets the stator mechanism 1 as a stator base 11, a support column 12 and a stator assembly, installs the stator assembly in the containing groove 111 of the stator base 11 through the support column 12, makes the stator assembly and the containing groove 111 of the stator base 11 form a heat dissipation space 121, thereby achieving heat dissipation of the stator assembly by the heat dissipation space 121, and further introducing the heat of the stator assembly into the heat dissipation space 121 through the support column 12, thereby improving the heat dissipation effect. Further, the support column 12 is provided with an umbrella skirt, thereby further increasing the heat dissipation area of the support column 12. Thus, the heat dissipation capacity of the stator mechanism 1 can be effectively improved. Further, the stator assembly is provided with an electrically conductive surface on the side away from the support column 12, and the rotor mechanism 2 is provided with an electrically conductive surface. The rotor mechanism 2 is rotatably connected to the stator base 11, so that the electrically conductive surface and the electrically conductive surface abut and conduct, thereby achieving 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 overall structure of the current collecting device 100, improves the safety performance of the large-current current collecting ring, and is convenient for later maintenance and maintenance.

[0116] In order to further increase the heat dissipation effect, in an embodiment, the support column 12 is provided with an umbrella skirt. In this embodiment, the plurality of stator pieces 13 are rigidly connected to the stator base 11 through the support column 12. The umbrella skirt on the support column 12 can be a heat-shrinkable umbrella skirt. The umbrella skirt makes the contact between the rotor mechanism 2 and the stator assembly suspended, increases the heat convection area, helps the heat dissipation of the two, and helps the transmission of large current. Alternatively, the support column 12 is provided with a plurality of umbrella skirts, and the plurality of umbrella skirts are arranged at intervals along the extension direction of the support column 12. In this embodiment, the umbrella skirt is optionally located at the middle part of the support column 12.

[0117] In order to further improve the disassembly and assembly convenience, the support column 12 and the stator piece 13 are optionally detachably connected, for example, by buckle connection, plug-in fitting, screw connection or pin connection, etc., which are not limited herein. The support column 12 and the stator base 11 are optionally detachably connected, for example, by buckle connection, plug-in fitting, screw connection or pin connection, etc., which are not limited herein. In this embodiment, the support column 12 and the stator piece 13 are connected by screws, and the bottom wall of the support column 12 and the stator base 11 are connected by screws.

[0118] In an embodiment, the umbrella skirt includes a fixed part and a heat dissipation part connected thereto, the support column 12 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 12 is greater than the cross-sectional area of the fixed part perpendicular to the extension direction of the support column 12.

[0119] In the embodiment, the umbrella skirt is provided with a fixed part and a heat dissipation part, so that the umbrella skirt is connected and installed on the support column 12 through the fixed part, and the cross-sectional area of the heat dissipation part perpendicular to the extension direction of the support column 12 is greater than that of the fixed part, so that the umbrella skirt increases the heat dissipation convection area through the heat dissipation part. It can be understood that the heat dissipation part is connected to one 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.

[0120] Optionally, the fixed part and the heat dissipation part are integrally formed. The umbrella skirt is provided with a mounting hole penetrating through the fixed part and the heat dissipation part, and the support column 12 is arranged in the mounting hole of the umbrella skirt. It can be understood that the support column 12 and the umbrella skirt can be fixedly connected, for example, by welding, bonding or the like, so as to improve the connection stability of the support column 12 and the umbrella skirt. Of course, the support column 12 and the umbrella skirt can also be detachably connected, for example, by buckle connection, plug-in cooperation, screw connection or pin connection, etc., which is not limited herein. In this way, the support column 12 and the umbrella skirt can be easily disassembled, and multiple umbrella skirts can be arranged according to actual conditions, which is not limited herein.

[0121] In the embodiment, as shown in Figure 1 , Figure 2 , Figure 3 , Figures 5 to 10 , the stator assembly is provided with a plurality of stator pieces 13, each of which is provided with a conductive surface, and the rotor mechanism 2 is provided with a plurality of rotor pieces 21, each of which is provided with a conductive surface. Each rotor piece 21 is arranged correspondingly to a stator piece 13, so that when the rotor mechanism 2 is rotationally connected to the stator base 11, each conductive surface is in abutment with a conductive surface to realize current transmission from the plurality of rotor pieces 21 of the rotor mechanism 2 to the plurality of stator pieces 13 of the stator mechanism 1, thereby realizing large current transmission.

[0122] It can be understood that the plurality of stator pieces 13 are arranged in concentric circles, so that a second gap 134 is formed between adjacent two stator pieces 13, and the plurality of rotor pieces 21 are arranged in concentric circles, so that a first gap is formed between adjacent two rotor pieces 21. When the rotor mechanism 2 is rotationally connected to the stator base 11, the second gap 134 and the first gap are correspondingly communicated, so that the structure of the stator assembly and the rotor mechanism 2 is simplified, and the heat dissipation space 121 can be communicated with the heat dissipation air duct through the second gap 134 and the first gap. In this way, the heat generated by the stator mechanism 1 can be effectively transmitted to the heat dissipation air duct through the second gap 134 and the first gap for heat dissipation, thereby further improving the heat dissipation effect and the heat dissipation capacity.

[0123] It should be noted that, compared with the prior art of separately arranging a cooling device in the wind driven generator, the current collecting device 100 is arranged with a heat dissipation air duct inside the rotor mechanism 2. When the rotor mechanism 2 rotates relative to the stator mechanism 1, the current contact surface and the conductive surface abut and contact to generate heat. The heat dissipation air duct is used to dissipate the generated heat. The stator assembly is installed in the accommodating groove 111 of the stator seat 11 through the support column 12. The heat generated by the stator assembly can be directly introduced into the heat dissipation space 121 for heat dissipation. The umbrella skirt is arranged on the support column 12 to increase the heat dissipation area of the support column 12, effectively and quickly realize heat dissipation, improve the heat dissipation effect, and improve the heat dissipation effect and stability of the current collecting device 100. The structure of the current collecting device 100 is simplified, the safety performance of the large-current current collecting ring is improved, and the later maintenance and maintenance are facilitated.

[0124] In an embodiment, each rotor piece 21 comprises a rotor 211, a yoke assembly 212 and a connecting row 213. The rotor 211 is provided with a current contact surface. One end of the yoke assembly 212 is connected to the side of the rotor 211 away from the current contact surface. The other end of the yoke assembly 212 is connected to the rotor seat 22. One end of the connecting row 213 is connected to the rotor 211 through the copper row 133 wire soft connection. The other end of the connecting row 213 penetrates the rotor seat 22 and is used to connect the cable.

[0125] In the embodiment, as shown in Figure 1 and Figure 3 , 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 circular structures with different diameters. The rotor 211 of the rotor piece 21 can be connected to the rotating disc 221 of the rotor seat 22 through the yoke assembly 212, so as to improve the connection stability of the rotor piece 21 and the rotor seat 22.

[0126] In order to further improve the connection stability of the rotor 211 and the rotor seat 22, as shown in Figure 3 , 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 10 , the side of the rotor 211 away from the yoke assembly 212 is provided with a protruding portion 2111. The side of the protruding portion 2111 away from the rotor piece 21 forms a current contact surface. In this way, the protruding portion 2111 can be conveniently inserted into the sliding groove 1311 and dynamically abut with the spring contact finger 132.

[0127] It can be understood that the width of the first gap formed between the two adjacent rotors 211 can be selected as 15mm-60mm. Optionally, the width of the first 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, facilitating installation, and on the other hand, two-pole breakdown can be prevented.

[0128] In the present embodiment, by connecting the connecting row 213 and the rotor 211 as a copper row soft connection, this connection mode is conducive to current transmission, and provides space for the axial movement of the rotor 211, increasing the spatial self-adaptability of the mechanism. Optionally, each rotor 211 is connected with a plurality of connecting rows 213, and the plurality of connecting rows 213 are arranged in a circumferential direction of the rotor 211.

[0129] Optionally, the plurality of connecting rows 213 of the plurality of rotors 211 are arranged in a spiral shape in the radial direction, that is, the plurality of connecting rows 213 of the plurality of rotors 211 are arranged in a non-overlapping manner in the radial direction. From the outermost rotor 211 to the innermost rotor 211, the plurality of connecting rows 213 are arranged in a spiral shape in the circumferential direction. In this way, the plurality of rotors 211 arranged in a concentric circle structure can not only increase the distance between the cables, but also facilitate installation, and can also prevent two-pole breakdown.

[0130] In an embodiment, as shown in Figure 3 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. The end of the fork rod 2122 away from the fork seat 2121 is connected with the rotor seat 22.

[0131] In the present embodiment, the number of fork assemblies 212 on each rotor 211 can be specifically set according to the diameter of the rotor 211. The number of fork assemblies 212 on the plurality of rotors 211 can be the same or different, which is not limited herein. 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 of 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 13.

[0132] In an embodiment, as shown in Figures 5 to 7As shown, the outer wall of the stator base 11 is provided with a wear-resistant ring 112, and the rotor base 22 is in sliding abutment with the wear-resistant ring 112. It can be understood that the wear-resistant ring 112 is arranged to help 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 rotating disc 221 of the rotor base 22 is arranged in a disc shape, the steel ring 223 is arranged in a ring shape, and the outer contour of the stator base 11 is arranged in a cylindrical shape, so that the stator base 11 is inserted into the mounting cavity formed by the steel ring 223 and the rotating disc 221 adjacent to one end of the slot of the accommodating groove 111, so that the steel ring 223 is in sliding abutment with the outer wall of the stator base 11. Alternatively, the wear-resistant ring 112 is arranged on the outer wall of the stator base 11 adjacent to the slot of the accommodating groove 111. The wear-resistant ring 112 is made of rubber material or material with wear-resistant performance, which is not limited here. The wear-resistant ring 112 can be arranged in a ring shape.

[0133] In an embodiment, as shown in Figures 5 to 7 the stator base 11 adjacent to the slot of the accommodating groove 111 is also provided with a wear-resistant block 113, and the rotor base 22 is in sliding abutment with the wear-resistant block 113. It can be understood that the wear-resistant block 113 is arranged to help 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 113 is arranged on the top end face of the stator base 11, thereby reducing the wear between the rotor base 22 and the top end face of the stator base 11.

[0134] Alternatively, the wear-resistant block 113 is made of rubber material or material with wear-resistant performance, which is not limited here. Alternatively, the wear-resistant block 113 includes a plurality of wear-resistant blocks 113, and the plurality of wear-resistant blocks 113 are arranged in a circumferential direction of the stator base 11.

[0135] In an embodiment, as shown in Figures 1 to 3 the rotor base 22 corresponding to the connection row 213 is provided with a through hole 222, 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 base 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 222 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.

[0136] 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 the large current environment of wind power, the two poles are easy to break down.

[0137] In an embodiment, the rotor mechanism 2 further comprises a separation assembly 23 arranged in the mounting cavity, the separation assembly 23 comprising a mounting block 231 and a plurality of spacing plates 234, wherein the mounting block 231 is connected to the rotor base 22, and the plurality of spacing plates 234 are arranged in a concentric circle and connected to the mounting block 231 respectively, each spacing plate 234 is located in a first gap, so that the adjacent two rotor pieces 21 are located on both sides of the spacing plate 234.

[0138] In the embodiment, as shown in Figure 2 and Figure 4 , by arranging the separation assembly 23, the spacing plate 234 of the separation assembly 23 separates the corresponding two rotors 211 and the adjacent two stator pieces 13, thereby increasing the creepage distance between each phase and preventing current breakdown. It can be understood that the separation assembly 23 is fixedly connected to the rotor base 22 through the mounting block 231, which improves the installation stability of the separation assembly 23, and facilitates the fixation of the plurality of spacing plates 234 through the mounting block 231, and the plurality of spacing plates 234 are arranged in a concentric circle.

[0139] It can be understood that each spacing plate 234 is located in a first gap, and when the rotor mechanism 2 is rotationally connected to the stator base 11, each spacing plate 234 is sequentially arranged in the first gap and the second gap 134. That is, each spacing plate 234 is located between the adjacent two rotor pieces 21 and the adjacent two stator pieces 13.

[0140] In the embodiment, as shown in Figure 4 , the mounting block 231 comprises a plurality of mounting blocks 231, which are arranged in the circumferential direction of the spacing plate 234. It can be understood that the mounting block 231 comprises a mounting portion 232 and a protruding portion 233 protruding from the mounting portion 232, the protruding portion 233 is connected to the rotor base 22, and the mounting portion 232 extends in the radial direction and is connected to the plurality of spacing plates 234 respectively.

[0141] In order to facilitate the connection and fixation of the spacing plate 234 and the mounting block 231, as shown in Figure 4As shown, each spacer plate 234 comprises a cylindrical portion 235 and a plurality of lug portions 236, the cylindrical portion 235 is in the shape of an open cylinder, the plurality of lug portions 236 are spaced and protrude from one end of the cylindrical portion 235, each lug portion 236 is provided with a mounting groove 237, part of the mounting block 231 is limited in the mounting groove 237, and a through air channel 238 connecting the heat dissipation channels is formed between two adjacent lug portions 236. Optionally, the plurality of lug portions 236 of the plurality of spacer plates 234 are correspondingly arranged in the radial direction.

[0142] In this embodiment, the through air channels 238 formed on the plurality of spacer plates 234 are beneficial to guide the airflow of the heat dissipation channels into the heat dissipation space 121 through the first gap and the second gap 134 respectively, so as to sufficiently and effectively dissipate the heat generated by the current collecting device 100.

[0143] In an embodiment, as shown in Figure 1 and Figure 2 As shown, the rotor mechanism 2 further comprises an oil drain 251 connected to the rotor seat 22 and an oil injector 252 connected to one end of the oil drain 251 away from the rotor seat 22, and the oil injector 252 is used to supply lubricating grease to the rotor member 21. It can be understood that by arranging the oil drain 251 and the oil injector 252, the oil injector 252 can accurately and stably supply lubricating oil through the pipeline, so as to ensure the stability of the current collecting device 100.

[0144] In the related art, for example, CN114725746A discloses a conductive slip ring structure capable of pre-adjusting the rotating speed of the device. The structure is provided with a conductive rod on the end face of the rotor, and a conductive adjusting ring composed of different resistance arc segments and insulating arc segments is fixed on the conductive rod. By rotating the conductive rod, the different resistance arc segments are in contact with the conductive ring to change the current, thereby realizing the pre-adjustment of the rotating speed of the device. However, the conductive slip ring of this structure will be seriously worn with the increase of use time, and is not suitable for the relatively extreme working condition of wind power.

[0145] In an embodiment, each stator member 13 comprises a stator 131 and a spring contact finger 132, the stator 131 is arranged in a ring shape and is arranged in the accommodating groove 111 through the support column 12, the stator 131 is provided with a sliding groove 1311 on the side away from the support column 12, the spring contact finger 132 is arranged in the sliding groove 1311, and a conductive surface is formed on the side of the spring contact finger 132 away from the bottom wall of the sliding groove 1311; wherein each rotor member 21 is provided with a protruding portion 2111, a conductive surface is formed on the side of the protruding portion 2111 away from the rotor member 21, and part of the protruding portion 2111 extends into the sliding groove 1311 so that the protruding portion 2111 abuts against the spring contact finger 132.

[0146] In this embodiment, as shown in Figures 5 to 10As shown, the stator 131 of the stator member 13 can be selected as a circular ring structure, so that the stators 131 of the plurality of stator members 13 are arranged as concentric circular structures with different diameters. In order to realize the installation of the spring contact finger 132, and facilitate the cooperation with the rotor member 21 to realize dynamic abutment, the top surface of the stator 131 is provided with a sliding groove 1311. Optionally, the sliding groove 1311 is arranged along the circumferential direction of the stator 131, that is, the sliding groove 1311 is an annular groove structure.

[0147] As can be understood, the spring contact finger 132 is arranged in the sliding groove 1311, and a conductive surface is formed on the side of the spring contact finger 132 away from the bottom wall of the sliding groove 1311, so that when the protruding portion 2111 of the rotor member 21 extends into the sliding groove 1311, the conductive surface of the protruding portion 2111 and the conductive surface of the spring contact finger 132 always abut. Optionally, the width of the sliding groove 1311 along the radial direction is greater than the width of the protruding portion 2111 along the radial direction.

[0148] In the embodiment, as shown in the figure, Figure 10 When the protruding portion 2111 abuts against the spring contact finger 132, the spring contact finger 132 is compressed under the action of the pressing force, thereby increasing the contact area between the rotor member 21 and the stator member 13, and the current flows through the spring contact finger 132. This mode is helpful for the transmission of large current and increases the reliability of the equipment.

[0149] In an embodiment, Figures 8 to 10 As shown, the bottom wall of the sliding groove 1311 is recessed to form a groove 1312, the spring contact finger 132 is accommodated and limited in the groove 1312, and part of the spring contact finger 132 protrudes from the groove of the groove 1312. As can be understood, by arranging the groove 1312 on the bottom wall of the sliding groove 1311, on the one hand, the groove 1312 is used to limit the installation of the spring contact finger 132, and on the other hand, during the rotation of the rotor member 21 relative to the stator member 13, the problem that the spring contact finger 132 moves with the rotor member 21 is avoided.

[0150] Of course, in order to further reduce the wear between the rotor member 21 and the stator member 13, in an embodiment, each stator member 13 also includes a lubricating grease, and the lubricating grease is accommodated in the groove 1312. As can be understood, the lubricating grease can not only reduce the wear between the rotor member 21 and the stator member 13, but also help the current collecting device 100 to transmit large current.

[0151] It should be noted that the lubricating grease in the groove 1312 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 on the support column 12 can effectively prevent the breakdown between the phases along the stand column.

[0152] In an embodiment, the spring contact fingers 132 comprise a plurality of finger portions 1321 and a plurality of connecting portions 1322, the plurality of finger portions 1321 and the plurality of connecting portions 1322 are alternately connected and form a ring shape, each finger portion 1321 forms a conductive surface on a side facing away from the bottom wall of the sliding groove 1311, the groove 1312 comprises a plurality of first groove segments 1313 and a plurality of second groove segments 1314, the plurality of first groove segments 1313 and the plurality of second groove segments 1314 are alternately arranged and communicate with each other, each finger portion 1321 is accommodated in a first groove segment 1313, and part of the finger portions 1321 protrude from the groove of the first groove segment 1313, and each connecting portion 1322 is accommodated in a second groove segment 1314.

[0153] In the embodiment, as shown in Figure 8 and Figure 9 , by arranging the spring contact fingers 132 as a plurality of finger portions 1321 and a plurality of connecting portions 1322, the plurality of finger portions 1321 and the plurality of connecting portions 1322 are alternately connected and form a ring shape, so that the stator 13 can abut against the rotor 21 through the plurality of finger portions 1321, and at the same time, the wear problem between the stator 13 and the rotor 21 can be reduced.

[0154] In an embodiment, the width of the second gap 134 is 15mm-60mm. In the embodiment, as shown in Figure 5 and Figure 6 , the width of the second gap 134 is the width of the second gap 134 in the radial direction. By arranging the distance between the adjacent two stators 13 to be between 15mm-60mm, the overall layout of the plurality of cables can be optimized, the ability of the conductive slip ring to transmit large current can be increased, and installation and maintenance can be facilitated to some extent; by controlling the width of the second gap 134, the creepage distance between the adjacent two stators 13 is effectively increased, and the effect of preventing current breakdown is achieved.

[0155] Alternatively, the width of the second gap 134 is 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, etc., which is not limited herein.

[0156] In the embodiment, the width of the first gap can be selected to be 15mm-60mm. The width of the first gap is the width of the first gap in the radial direction. By arranging the distance between the adjacent two rotors 21 to be between 15mm-60mm, the overall layout of the plurality of cables can be optimized, the ability of the conductive slip ring to transmit large current can be increased, and installation and maintenance can be facilitated to some extent; by controlling the width of the first gap, the creepage distance between the adjacent two rotors 21 is effectively increased, and the effect of preventing current breakdown is achieved. Alternatively, the width of the first gap is the same as the width of the second gap 134.

[0157] It can be understood that the widths of the plurality of second gaps 134 formed by the plurality of stator pieces 13 can be the same or different. Alternatively, the widths of the plurality of second gaps 134 gradually increase along the radial direction from the center of the stator assembly. Of course, the widths of the plurality of first gaps formed by the plurality of rotor pieces 21 can be the same or different. Alternatively, the widths of the plurality of first gaps gradually increase along the radial direction from the center of the rotor mechanism 2.

[0158] In the embodiment, as shown in Figure 6 , the projection of the umbrella skirt on the bottom wall of the accommodating groove 111 partially overlaps the projection of the second gap 134 on the bottom wall of the accommodating groove 111. It can be understood that the cross-sectional area of the umbrella skirt along the direction perpendicular to the extension direction of the support column 12 is greater than the area of the stator piece 13 in the overlapping portion of the support column 12, so that the heat dissipation area can be effectively increased by the umbrella skirt, and the heat dissipation effect can be improved.

[0159] In order to further improve the installation stability of the stator piece 13, the support column 12 can be provided in plurality, and each stator piece 13 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 along the circumferential direction of the stator piece 13. Alternatively, the number of support columns 12 is 2-10. In the embodiment, as shown in Figure 6 , the line connecting the support columns 12 connected to the adjacent two stator pieces 13 does not coincide with the radial direction of the stator assembly, so that the mutual influence of the umbrella skirts on the adjacent support columns 12 can be avoided, and the structure interference can be avoided, and the heat dissipation effect can be improved.

[0160] It can be understood that the plurality of stator pieces 13 can be two, three, four, five, six or more, which are not limited herein. Correspondingly, the plurality of rotor pieces 21 can be two, three, four, five, six or more, which are not limited herein. In the embodiment, the stator piece 13 can be six, and the rotor piece 21 can be six, the six stator pieces 13 are arranged in a concentric circle structure, the six rotor pieces 21 are arranged in a concentric circle structure, and the rotor piece 21 and the stator piece 13 are arranged one by one.

[0161] In an embodiment, as shown in Figure 5 and Figure 7 , each stator piece 13 further comprises a copper bar 133 and a temperature sensor 135, one end of the copper bar 133 is connected to the stator 131, the other end of the copper bar 133 penetrates the bottom wall of the accommodating groove 111, and the temperature sensor 135 is arranged on the side of the stator base 11 away from the rotor piece 21 and close to the end of the copper bar 133 extending out of the accommodating groove 111.

[0162] In the embodiment, the current transmitted from the rotor member 21 to the stator member 13 is conducted by the copper bars 133 connected to the stator 131. The copper bars 133 can be copper wire bars, elastic pieces or conductive connecting plates, which are not limited herein. It can be understood that the temperature sensor 135 is arranged to detect the temperature of the stator member 13 and transmit a temperature signal to prevent the temperature of the conductive slip ring from rising too high.

[0163] It can be understood that the temperature sensor 135 can be fixed to the copper bars 133 or the stator base 11. The detection probe of the temperature sensor 135 can directly abut against the copper bars 133 or be arranged close to the copper bars 133, which are not limited herein. Alternatively, each stator member 13 further comprises a plurality of copper bars 133 arranged along the circumferential direction of the stator 131. Such arrangement is helpful for the current collecting device 100 to transmit large current.

[0164] In an embodiment, the stator mechanism 1 further comprises a cable base 136 connected to the end of the stator base 11 away from the rotor base 22 and a cable 137 having one end connected to the copper bars 133 and the other end fixed to the cable base 136.

[0165] In the embodiment, as shown in Figure 1 and Figure 5 , the cable base 136 is arranged to facilitate the installation and fixation of the plurality of cables 137 and the sequential connection of the cables 137, thereby avoiding the mess of the cables 137.

[0166] In an embodiment, the current collecting device 100 further comprises a locking assembly 4 connected to the outer wall of the rotor base 22. One end of the locking assembly 4 is provided with a rolling member 425. The rotor base 22 is detachably covered on the slot opening of the accommodating groove 111 and rotationally connected to the stator mechanism 1. The current collecting device 100 has a locking state in which the locking assembly 4 locks the stator mechanism 1 and a release state in which the locking assembly 4 releases the stator mechanism 1. In the locking state, the rolling member 425 rolls against the stator mechanism 1. In the release state, the rolling member 425 is away from the stator mechanism 1.

[0167] In the embodiment, as shown in Figure 1 , Figure 5 and Figure 11As shown, by arranging the locking assembly 4 on the outer wall of the rotor base 22 of the rotor mechanism 2, when the rotor base 22 of the rotor mechanism 2 is covered on the slot of the accommodating groove 111, the rotor mechanism 2 is locked or positioned on the stator mechanism 1 by the locking assembly 4, so that the rotor mechanism 2 and the stator mechanism 1 can be positioned and limited in the axial direction, and the rotation or rotation of the rotor mechanism 2 relative to the stator mechanism 1 is not affected. It can be understood that the stator mechanism 1 is locked or released by the locking assembly 4, so that the current collecting device 100 has a locking state and a release state.

[0168] It can be understood that by arranging the rolling member 425 at one end of the locking assembly 4, when the current collecting device 100 is in the locking state, the rolling member 425 rolls against the stator mechanism 1, so that the rotation or rotation of the rotor mechanism 2 relative to the stator mechanism 1 can be effectively guaranteed; in the release state, the rolling member 425 is away from the stator mechanism 1, so that the disassembly of the rotor mechanism 2 and the stator mechanism 1 is facilitated, the structure is simplified, and maintenance is facilitated.

[0169] In this embodiment, as shown in Figure 1 , Figure 5 and Figure 11 , the structure of the locking assembly 4 can be a locking hook structure, or other structures that can lock or release the stator mechanism 1. For details, refer to the prior art, which is not limited herein.

[0170] The current collecting device 100 of the present application is provided with an accommodating groove 111 in the stator mechanism 1, and an electrically conductive surface is arranged in the accommodating groove 111, and a contact surface is arranged in the rotor mechanism 2. When the rotor mechanism 2 is detachably covered on the slot of the accommodating groove 111 of the stator mechanism 1 and rotationally connected with the stator mechanism 1, the contact surface of the rotor mechanism 2 is in abutting conduction with the electrically conductive surface in the accommodating groove 111 at this time. When the rotor mechanism 2 rotates or rotates relative to the stator mechanism 1, the contact surface of the rotor mechanism 2 and the electrically conductive surface in the accommodating groove 111 are always in abutting conduction, thereby realizing dynamic transmission of electric power from the rotor mechanism 2 to the stator mechanism 1. At the same time, by arranging the locking assembly 4 on the outer wall of the rotor base 22, and arranging the rolling member 425 at one end of the locking assembly 4, the stator mechanism 1 is locked or released by the locking assembly 4, so that the current collecting device 100 has a locking state and a release state. In the locking state, the rolling member 425 rolls against the stator mechanism 1, and in the release state, the rolling member 425 is away from the stator mechanism 1, so that the locking assembly 4 can not only guarantee the axial positioning and pressure connection of the rotor mechanism 2 and the stator mechanism 1, but also facilitate the disassembly of the current collecting device 100, so that the current collecting device 100 effectively reduces the maintenance cost. The current collecting device 100 of the present application not only improves the stability, greatly simplifies the overall structure of the current collecting device 100, improves the safety performance of the large-current current collecting ring, and is convenient for later maintenance and maintenance.

[0171] It can be understood that the locking assembly 4 can also be arranged on the stator mechanism 1. When the rotor mechanism 2 is detachably covered on the slot opening of the accommodating groove 111 of the stator mechanism 1 and rotationally connected with the stator mechanism 1, the locking assembly 4 is used to lock or release the rotor mechanism 2, so that the current collecting device 100 has a locking state and a release state. In the locking state, the rolling piece 425 is in rolling abutment with the rotor mechanism 2, and in the release state, the rolling piece 425 is away from the rotor mechanism 2. Therefore, the locking assembly 4 can not only ensure the axial positioning and pressure connection of the rotor mechanism 2 and the stator mechanism 1, but also facilitate the disassembly of the current collecting device 100, so that the current collecting device 100 effectively reduces the maintenance cost.

[0172] In an embodiment, the locking assembly 4 includes a fixing piece 41, a locking piece 42, and an adjusting piece 43. The fixing piece 41 is connected to the outer wall of the rotor base 22. The locking piece 42 is movably connected to the fixing piece 41. One end of the locking piece 42 is provided with a rolling piece 425. The adjusting piece 43 is rotationally connected with the locking piece 42 and the fixing piece 41. The adjusting piece 43 drives the locking piece 42 to lock or release the stator mechanism 1, so that the rolling piece 425 is in rolling abutment or away from the stator mechanism 1.

[0173] In this embodiment, as shown in Figure 1 , Figure 5 and Figure 11 , the fixing piece 41 can be a fixed plate structure. The fixing piece 41 can be fixedly connected to the outer wall of the rotor base 22 or integrally formed on the outer wall of the rotor base 22, which is not limited herein. By arranging the fixing piece 41 on the outer wall of the rotor base 22, one end of the locking piece 42 protrudes from the end surface of the rotor mechanism 2.

[0174] It can be understood that the locking piece 42 is movably arranged on the fixing piece 41, so that one end of the locking piece 42 is provided with a rolling piece 425, and the adjusting piece 43 is rotationally connected with the locking piece 42 and the fixing piece 41. Therefore, the adjusting piece 43 drives the locking piece 42 to lock or release the stator mechanism 1, so that the rolling piece 425 is in rolling abutment or away from the stator mechanism 1.

[0175] In this embodiment, the locking piece 42 can be a strip or plate structure, and the locking piece 42 and the fixing piece 41 can be slidingly connected or movably connected, which is not limited herein. The adjusting piece 43 can be a handle structure, which is convenient for a user to operate through the adjusting piece 43 to realize the sliding or movement of the locking piece 42 relative to the fixing piece 41, so that the locking piece 42 locks or releases the rotor mechanism 2.

[0176] Understandably, the locking assembly 4 locks and limits the rotor mechanism 2 through the cooperation of the fixing member 41, the locking member 42, and the adjusting member 43, so that the stator mechanism 1 is axially limited by the locking assembly 4. In this embodiment, by providing a rolling member 425 at one end of the locking member 42, the rolling member 425 rolls against the stator mechanism 1, which can achieve limited installation and reduce wear.

[0177] In this embodiment, a limiting platform is provided on the outer wall of the stator base 11 of the stator mechanism 1. The limiting platform is arranged around the periphery of the outer wall of the stator base 11, so that the rolling element 425 of the locking assembly 4 rolls and abuts against the limiting platform, which can both achieve limiting installation and reduce wear.

[0178] Optionally, the locking assembly 4 includes multiple locking assemblies 4, which are spaced apart along the circumferential direction of the outer wall of the rotor seat 22 and surround the opening of the mounting cavity. It is understood that the multiple locking assemblies 4 on the outer wall of the rotor seat 22 provide axial positioning of the rotor mechanism 2, preventing the rotor mechanism 2 from disengaging from the stator mechanism 1. The rolling element 425 on the locking assembly 4 contacts the limiting platform of the stator seat 11, reducing friction caused by its circumferential movement. This structure allows for rapid pressing, reliable contact, and convenient disassembly, facilitating maintenance.

[0179] The current collector 100 of this application is suitable for wind turbine yaw applications where the rotor rotation speed is slow, it can withstand large currents, and has a stable structure. It provides a novel conductive slip ring structure with a long service life in the extreme environment of wind turbines. During the operation of the current collector 100, it can not only ensure the axial positioning between the rotor mechanism 2 and the stator mechanism 1, but also ensure that the rotor mechanism 2 and the stator mechanism 1 can be easily disassembled during maintenance.

[0180] In one embodiment, such as Figure 1 , Figure 5 and Figure 11 As shown, the locking member 42 has a mounting hole 421 at the end away from the adjusting member 43, and the rolling member 425 is a cam bearing. One end of the cam bearing passes through the mounting hole 421, and the other end of the cam bearing is provided with a ball bearing. In the locked state, the ball bearing rolls against the rotor seat 22. When the rotor seat 22 rotates relative to the stator mechanism 1, the ball bearing rolls with the rotor seat 22 relative to the limiting platform of the stator seat 11.

[0181] It can be understood that the rolling member 425 is arranged as a cam bearing, one end of the cam bearing is arranged in the mounting hole 421, so that the cam bearing is fixedly installed, the other end of the cam bearing is provided with a ball bearing, so that in the locked state, the ball bearing rolls against the limiting table of the stator base 11, when the rotor mechanism 2 rotates relative to the stator mechanism 1, the ball bearing rolls relative to the limiting table of the stator base 11 with the rotor base 22 of the rotor mechanism 2, the ball bearing can reduce the friction caused by the circumferential movement of the rotor base 22 of the rotor mechanism 2, so that the quick crimping can be realized, the contact is reliable, and the disassembly is convenient, which is beneficial to maintenance.

[0182] Optionally, the inner ring of the ball bearing and the shaft of the cam bearing are coated with fastening glue to prevent falling off and avoid unnecessary disassembly.

[0183] In an embodiment, as shown in Figure 1 、 Figure 5 and Figure 11 , the locking member 42 is provided with a movable groove 422, the movable groove 422 is provided with a rotating shaft 423, the fixed member 41 is provided with a rotating connecting lug 411 corresponding to the movable groove 422, one end of the adjusting member 43 is rotatably connected with the rotating connecting lug 411 and rotatably arranged on the rotating shaft 423, the other end of the adjusting member 43 is provided with a handle; wherein the adjusting member 43 drives the locking member 42 to move relative to the fixed member 41, so that the rotating connecting lug 411 moves along the movable groove 422.

[0184] It can be understood that in this way, the adjusting member 43 can drive the locking member 42 to move relative to the fixed member 41, so that the locking member 42 locks or releases the rotor mechanism 2, so that the rolling member 425 rolls against or away from the rotor mechanism 2.

[0185] In order to avoid the locking member 42 from being separated from the fixed member 41, in an embodiment, as shown in Figure 1 、 Figure 5 and Figure 11 , the locking member 42 is provided with a locking hole 424, the fixed member 41 is provided with a moving hole, and the locking assembly 4 further comprises a locking member 44, the locking member 44 is arranged in the moving hole and the locking hole 424 in sequence; wherein the adjusting member 43 drives the locking member 42 to move relative to the fixed member 41, so that the locking member 44 moves along the moving hole.

[0186] It can be understood that the locking member 44 can be a nut and bolt structure, or other structures that can realize that the locking member 42 can be locked on the fixed member 41, and also can move relative to the fixed member 41 under the driving of the adjusting member 43. Optionally, the nut is a locking nut, and the bolt is a hole bolt, the locking nut and the hole bolt are matched to lock the locking member 42, prevent the locking member 42 from loosening, and further improve the stability of the structure. The hole of the hole bolt can be added with a lead seal to avoid unnecessary disassembly.

[0187] In the embodiment, the adjusting member 43 is a manual pressing handle, and the locking member 42 is driven to move downward to a structural dead point by manually pressing the handle to the vertical state, so as to realize the locking between the rotor mechanism 2 and the stator mechanism 1. The rotor mechanism 2 and the stator mechanism 1 are loosened by lifting the handle to drive the locking member 42 to move upward. In this way, the quick pressing between the rotor mechanism 2 and the stator mechanism 1 can be realized, and the abnormal vibration can be prevented.

[0188] It can be understood that, by the mounting hole provided on the fixing member 41, the pin shaft mounting hole connected with the handle of the locking member 42 is also blocked between the locking member 42 and the fixing member 41 when the locking member 42 is in the pressing position, and cannot be disassembled unless the lead seal is opened, so as to avoid meaningless disassembly.

[0189] In an embodiment, the current collecting device 100 further comprises a weak current slip ring 3, the rotor mechanism 2 is further provided with a first through hole, the stator mechanism 1 is provided with a second through hole corresponding to the first through hole, the second through hole penetrates the bottom wall of the accommodating groove 111, and the weak current slip ring 3 is sequentially arranged in the first through hole and the second through hole.

[0190] In the embodiment, as shown in Figure 1 、 Figure 2 、 Figure 5 and Figure 6 , 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 arranged on the wind turbine generator set, the weak current slip ring 3 is used for the interaction of the power transmission and control signal between the top of the wind tower and the base.

[0191] The current collecting device 100 of the application can be applied to the wind turbine yawing, which is slow in the rotor rotating speed and needs to withstand 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 wind turbine yawing and the static conductor fixed in the wind turbine tower under the large current condition of the 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 136, and the safety performance of the large current conductive slip ring is improved by setting the stator assembly and the rotor 21 as a concentric circle structure and increasing the partition assembly 23 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 locking assembly 4, the compression spring 2124 of the pull fork assembly 212 and other structures.

[0192] It can be understood that the fixing member 41 of the locking assembly 4 is fixedly connected with the stator mechanism 1. The fixing member 41 and the locking member 42 are connected through a lock nut and a bolt with holes. The locking member 42 is provided with a groove, so that the locking member 42 can move up and down. By manually pressing the handle to the vertical state, the locking member 42 is driven to move downward to the structural dead point, so as to realize the locking between the rotor mechanism 2 and the stator mechanism 1. By lifting the handle, the locking member 42 is driven to move upward to loosen the rotor mechanism 2 and the stator mechanism 1. In this way, the stator and the rotor can be quickly pressed to prevent abnormal vibration.

[0193] The locking assembly 4 is in contact with the rotor mechanism 2 through a cam bearing. When the rotor mechanism 2 rotates, the cam bearing greatly reduces friction and wear, and improves the stability of the structure. The inner ring of the cam bearing and the shaft are coated with fastening glue to prevent falling and avoid unnecessary disassembly. The nut is a lock nut, which is matched with a bolt with holes. A lead seal is installed on the bolt with holes to lock the lock nut and prevent loosening. The nut and the bolt are coated with thread fastening glue to further improve the stability of the structure and avoid unnecessary disassembly.

[0194] The application also provides a wind turbine generator set, which comprises a tower, a nacelle 500 and a power collecting device 100. The specific structure of the power collecting device 100 is referred to the foregoing embodiments. Since the wind turbine generator set adopts all the technical solutions of the foregoing embodiments, it at least has all the beneficial effects brought by the technical solutions of the foregoing embodiments, which will not be described here.

[0195] In the embodiment, as shown in Figure 1 The nacelle 500 is rotatably connected with the tower. The nacelle 500 is provided with a generator. The rotor mechanism 2 of the power collecting device 100 is arranged in the nacelle 500 and connected with the generator. The stator mechanism 1 of the power collecting device 100 is connected with the tower. It can be understood that the end of the tower away from the nacelle 500 is fixed to the ground. The nacelle 500 is provided with a plurality of fan blades. The fan blades of the nacelle 500 are rotated by wind force in the high altitude to drive the rotor mechanism 2 of the power collecting device 100 to rotate relative to the stator mechanism 1.

[0196] The above is only an optional embodiment of the application, and does not limit the patent scope of the application. Any equivalent structural transformation made according to the content of the application specification and drawings, or direct / indirect application in other related technical fields within the concept of the application is included in the patent protection scope of the 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 is provided with a receiving groove, and an electrically conductive surface is arranged in the receiving groove. The stator mechanism comprises a stator base, a plurality of stator pieces and a support column. The stator base is provided with the receiving groove. The plurality of stator pieces are arranged in the receiving groove in a concentric circle mode. A second gap is formed between two adjacent stator pieces. The plurality of stator pieces are connected with the stator base through the support column and form a heat dissipation space in communication with the second gap with the stator base. The stator piece is provided with the electrically conductive surface on the side away from the support column. The outer wall of the stator base is provided with a wear-resistant ring. A rotor mechanism comprises a rotor base and a rotor assembly. The rotor base is provided with a mounting cavity. The rotor assembly is arranged in the mounting cavity and forms a heat dissipation air duct with the rotor base. The rotor assembly is provided with an electrically conductive surface. The rotor mechanism covers the slot opening of the receiving groove and is rotationally connected with the stator mechanism, so that the electrically conductive surface is in abutment with the electrically conductive surface. Each of the stator pieces comprises a stator and a spring contact finger. The stator is arranged in a ring shape. The stator is provided with a sliding groove on the side away from the support column. The spring contact finger is arranged in the sliding groove. The spring contact finger forms the electrically conductive surface on the side away from the bottom wall of the sliding groove. 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. Each of the contact finger portions forms the electrically conductive surface on the side away from the bottom wall of the sliding groove.

2. The current collecting device of claim 1, wherein The rotor base is further provided with an air inlet and an air outlet in communication with the heat dissipation air duct. The rotor mechanism further comprises a fan. The fan is arranged at the air inlet and / or the air outlet.

3. The current collecting device of claim 2, wherein The rotor mechanism further comprises a check valve. The check valve is arranged at the air outlet. And / or, the rotor mechanism further comprises a filter screen. The filter screen is arranged at the air inlet and / or the air outlet. And / or, the rotor mechanism further comprises a louver. The louver is arranged at the air inlet and / or the air outlet. And / or, the rotor base comprises a rotating disc and a steel ring. The steel ring is arranged at the circumference of the rotating disc and forms the mounting cavity with the rotating disc. The steel ring is provided with the air inlet and the air outlet in communication with the mounting cavity. The rotating disc covers the slot opening of the receiving groove. The steel ring is in sliding abutment with the outer wall of the stator mechanism. The rotor assembly is connected with the rotating disc and forms the heat dissipation air duct with the rotating disc and the steel ring.

4. The current collecting device of claim 1, wherein The rotor assembly comprises a plurality of rotor pieces. The plurality of rotor pieces are arranged in the mounting cavity in a concentric circle mode. A first gap in communication with the heat dissipation air duct is formed between two adjacent rotor pieces. Each of the rotor pieces is provided with the electrically conductive surface. The rotor base covers the slot opening of the receiving groove and is rotationally connected with the stator base, so that each of the rotor pieces is arranged correspondingly with one of the stator pieces, and each of the electrically conductive surfaces is in abutment with one of the electrically conductive surfaces.

5. The current collecting device of claim 4, wherein Each of the rotor pieces comprises: A rotor is provided with the electrically conductive surface. a yoke assembly, one end of the yoke assembly is connected to the side of the rotor away from the live surface, the other end of the yoke assembly is connected to the rotor base; and a connecting row, one end of the connecting row is connected to the rotor through a copper row wire, the other end of the connecting row penetrates the rotor base for connecting a cable.

6. The current collecting device of claim 5, wherein The yoke assembly comprises a yoke base, a yoke rod, a yoke sleeve and a compression spring, the yoke base is connected to the side of the rotor away from the live surface, the yoke rod is sleeved on the yoke base, the compression spring is installed between the yoke base and the yoke rod, the yoke sleeve is sleeved on the yoke rod, and one end of the yoke rod away from the yoke base is connected to the rotor base.

7. The current collecting device of claim 5, wherein The rotor base and the wear-resistant ring slide against each other; And / or, the stator base is provided with a wear-resistant block adjacent to the slot opening of the accommodating groove, and the rotor base and the wear-resistant block slide against each other; And / or, the yoke assembly comprises a plurality of yoke assemblies, and the plurality of yoke assemblies are arranged at intervals along the circumferential direction of the rotor; And / or, each rotor is connected to a plurality of connecting rows, and the plurality of connecting rows are arranged at intervals along the circumferential direction of the rotor; And / or, the plurality of connecting rows of the plurality of rotors are arranged in a spiral shape along the radial direction; And / or, the rotor base is provided with a through hole corresponding to the connecting row, the connecting row comprises a wire row, a busbar and a fixing block, one end of the wire row is connected to the side of the rotor base facing the rotor through the fixing block, the busbar 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.

8. The current collecting device of claim 4, wherein The rotor mechanism further comprises a separation assembly arranged in the mounting cavity, the separation assembly comprises: a mounting block connected to the rotor base; and a plurality of spacer plates arranged at intervals in concentric circles and connected to the mounting block respectively, each spacer plate is located in a first gap, so that two adjacent rotor members are located on both sides of the spacer plate.

9. The current collecting device of claim 8, wherein The mounting block comprises a plurality of mounting blocks arranged at intervals along the circumferential direction of the spacer 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 base, the mounting portion extends along the radial direction and is connected to a plurality of spacer plates respectively; And / or, each spacer plate 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 at intervals on one end of the cylindrical portion, each lug portion is provided with a mounting groove, part of the mounting block is located in the mounting groove, and a through air channel communicating with the heat dissipation channel is formed between two adjacent lug portions; And / or, the rotor mechanism further comprises an oil drain and an oil injector, the oil drain is connected to the rotor base, the oil injector is connected to one end of the oil drain away from the rotor base, and the oil injector is used to supply lubricating grease to the rotor member.

10. The current collecting device according to claim 4, wherein The stator is arranged in the accommodating groove through the support column; Each of the rotor members is provided with a protrusion, a side of the protrusion away from the rotor member forms the electric shock surface, and part of the protrusion extends into the sliding groove so that the protrusion abuts against the spring contact finger.

11. The current collecting device of claim 10, 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.

12. The current collecting device of claim 11, wherein 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 communicated with each other, each of the contact finger portions is contained in a first groove segment, and part of the contact finger portion protrudes from a slot of the first groove segment, and each of the connecting portions is contained in a second groove segment. Furthermore, each of the stator members further comprises grease, and the grease is contained in the groove. Furthermore, the width of the first gap is 15mm-60mm. Furthermore, the width of the second gap is 15mm-60mm. Furthermore, the support column is detachably connected with the stator. Furthermore, the support column is detachably connected with the bottom wall of the containing groove.

13. The current collecting device of claim 10, wherein Each of the stator members further comprises a copper bar and a temperature sensor, one end of the copper bar is connected with the stator, the other end of the copper bar penetrates through the bottom wall of the containing groove, and the temperature sensor is arranged on a side of the stator seat away from the rotor member and close to the end of the copper bar extending out of the containing groove.

14. The current collecting device of claim 13, wherein The stator mechanism further comprises a cable seat and a cable, the cable seat is connected with an end of the stator seat away from the rotor seat, one end of the cable is connected with 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 the copper bars, and the plurality of copper bars are arranged at intervals along the circumferential direction of the stator.

15. The current collecting device according to any one of claims 1 to 14, wherein The current collecting device further comprises a locking assembly, one end of the locking assembly is provided with a rolling member, the rotor seat is detachably covered on the slot of the containing groove, and the rotor seat is rotatably connected with the stator mechanism. The current collecting device has a locking state in which the locking assembly locks the stator mechanism and a release state in which the locking assembly releases the stator mechanism. In the locking state, the rolling member rolls against the stator mechanism. In the release state, the rolling member is away from the stator mechanism.

16. The current collecting device of claim 15, wherein The locking assembly comprises: a fixing member connected with the outer wall of the rotor seat; a locking member movably connected with the fixing member, one end of the locking member being provided with the rolling member; and an adjusting member rotatably connected with the locking member and the fixing member; The adjusting member drives the locking member to lock or release the stator mechanism, so that the rolling member rolls against or is away from the stator mechanism.

17. The current collecting device of claim 15, wherein The locking assembly comprises a plurality of locking assemblies arranged at intervals along the circumferential direction of the outer wall of the rotor seat.

18. A wind power unit, characterized in that The wind turbine generator set comprises: a tower; a nacelle rotatably connected with the tower, the nacelle being provided with a generator; and a current collecting device. The current collecting device according to any one of claims 1 to 17, wherein a rotor mechanism of the current collecting device is provided in the nacelle and connected to the generator, and a stator mechanism of the current collecting device is connected to the tower.

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