Current collection device and wind generating set

Abstract

The utility model provides a current collection device and a wind generating set. Wherein the current collection device comprises a supporting seat, a rotating shaft and a plurality of bearing assemblies, and the rotating shaft is rotatably arranged on the supporting seat; the multiple bearing assemblies are arranged on the radial outer side of the rotating shaft, fixedly connected with the supporting base and make contact with the periphery of the rotating shaft, and when the rotating shaft rotates, the multiple bearing assemblies can rotate along with the rotating shaft so as to restrain the rotating shaft from moving in the radial direction and / or the axial direction. According to the current collection device provided by the embodiment of the invention, when the rotating shaft rotates on the supporting seat, the plurality of bearing assemblies rotate along with the rotating shaft, and auxiliary support is provided in the circumferential direction of the rotating shaft through the synergistic effect of the plurality of bearing assemblies, so that the movement of the rotating shaft in the radial direction and / or the axial direction is inhibited; therefore, the jumping and swinging problems of the rotating shaft in the rotating process can be relieved, and the stability and reliability of the current collection device are ensured.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation technology, specifically to a power collection device and a wind turbine generator set. Background Technology

[0002] As the power output of wind turbines continues to increase, their size will also grow, leading to a corresponding increase in the size of the collector rotor. However, with the increase in rotor cross-section and the extension of shaft length, the rotor's rotation center may not align with the shaft's centerline. This can cause the rotor to jerk or wobble during rotation, resulting in poor stability and reliability of the collector.

[0003] Based on the above, it is necessary to provide a current collector that can suppress rotor runout. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a current collection device and a wind turbine generator set to solve the problem that the rotation center of the rotor of the existing current collection device is not consistent with the center line of the shaft system, which will cause the rotor to jump or swing during rotation, resulting in poor stability and reliability of the current collection device.

[0005] According to the present invention, a current collection device is provided, wherein the current collection device includes: a support base, a rotating shaft and a plurality of bearing assemblies, wherein the rotating shaft is rotatably disposed on the support base; the plurality of bearing assemblies are respectively disposed on the radially outer side of the rotating shaft, fixedly connected to the support base, and in contact with the outer periphery of the rotating shaft, wherein when the rotating shaft rotates, the plurality of bearing assemblies can rotate with the rotating shaft to suppress the rotating shaft from moving in the radial and / or axial directions.

[0006] In some embodiments, a guide disk is fixedly disposed on the outer periphery of the rotating shaft, wherein the guide disk is sleeved on the rotating shaft, coaxially disposed with the rotating shaft, and slidably contacts the plurality of bearing assemblies.

[0007] In some embodiments, the bearing assembly includes: a mounting base, a positioning shaft, a bearing, and an elastic element, wherein the mounting base is fixed to the support base; the positioning shaft is fixed to the mounting base; the bearing is sleeved on the positioning shaft; and the elastic element is compressively disposed between the mounting base and the bearing, such that the bearing can move axially on the positioning shaft to abut against the outer periphery of the guide disk, and such that the bearing presses against the guide disk.

[0008] In some embodiments, the elastic element enables the bearing to press the guide disc toward a first direction, wherein the first direction is a direction inclined relative to the radial direction of the guide disc, or a direction inclined downward relative to the radial direction of the guide disc.

[0009] In some embodiments, the outer side wall of one of the guide disc and the outer ring of the bearing has an upward and outward inclined surface or a downward and outward inclined surface, and the outer side wall of the other of the guide disc and the outer ring of the bearing is an arc surface. The arc surface and the inclined surface cooperate to cause the bearing to press the guide disc in a first direction.

[0010] In some embodiments, the bearing assembly further includes an adjusting nut threaded onto the positioning shaft; wherein the elastic element is compressively disposed between the adjusting nut and the bearing, and by turning the adjusting nut, the elastic compressive force of the elastic element can be adjusted so that the bearing abuts against the guide plate.

[0011] In some embodiments, the bearing assembly further includes a stop portion disposed on the positioning shaft, capable of connecting the positioning shaft and the adjusting nut to restrict the adjustment nut from rotating relative to the positioning shaft; and / or, the stop portion is capable of moving in the axial direction of the positioning shaft to unlock the adjusting nut.

[0012] In some embodiments, the surface of the positioning shaft is provided with a first slot extending in a vertical direction, the outer surface of the adjusting nut is provided with a second slot, the stop portion includes a connecting ring, at least one first pin extending from the inner circumference of the connecting ring, and at least one second pin extending obliquely from the outer circumference of the connecting ring. The connecting ring is sleeved on the positioning shaft and located between the elastic member and the adjusting nut. The first pin is inserted into the first slot and can move up and down in the first slot. The second pin can be inserted into or disengaged from the second slot.

[0013] In some embodiments, the upper end of the positioning shaft is connected to the support base, and the lower end of the positioning shaft is connected to the mounting base.

[0014] In some embodiments, the current collector further includes a rotary support portion, the rotary support portion including an outer ring plate and an inner ring plate that are rotatable relative to each other, one of the outer ring plate and the inner ring plate being fixedly connected to the support base, and the other of the outer ring plate and the inner ring plate being fixedly connected to a rotating shaft, such that the rotating shaft can rotate relative to the support base.

[0015] In some embodiments, the rotary support includes an outer ring plate, an inner ring plate, and a second rolling element, wherein the outer ring plate is fixedly connected to the support base; the inner ring plate is disposed inside the outer ring plate and fixedly connected to the lower end of the rotating shaft; and the second rolling element is disposed between the outer ring plate and the inner ring plate, so that the inner ring plate can rotate relative to the outer ring plate.

[0016] In some embodiments, a connecting flange is fixedly connected to the lower end of the rotating shaft, the inner ring plate is fixed to the connecting flange, and the connecting flange is slidably supported on the outer ring plate.

[0017] In some embodiments, the rotating shaft and the connecting flange are tenon-and-mortise connected; and / or, a plurality of rollers are mounted on the upper surface of the outer ring plate, and the connecting flange is rolledly supported on the plurality of rollers.

[0018] In some embodiments, the support base includes a base plate and an upper cover plate, the upper cover plate being connected above the base plate; wherein, there is a receiving space between the base plate and the upper cover plate, the bearing assembly is disposed in the receiving space, and the bearing assembly is mounted on the lower surface of the upper cover plate; the lower end of the rotating shaft is rotatably disposed on the base plate, and the upper end of the rotating shaft can extend out from the upper cover plate.

[0019] In some embodiments, the bearing assembly is a rolling bearing or a sliding bearing with a steel oil-sealed end cap on the end face.

[0020] According to a second aspect of this application, a wind turbine generator set is provided, wherein the wind turbine generator set includes a tower, a nacelle mounted on the tower, and the aforementioned power collection device disposed in the tower, the rotating shaft of the power collection device being connected to the nacelle, and the support base of the power collection device being fixedly connected to the tower.

[0021] According to the current collection device and wind turbine generator provided in the embodiments of this application, when the shaft rotates on the support, multiple bearing assemblies will rotate accordingly. Through the coordinated action of multiple bearing assemblies, necessary auxiliary support is provided in the circumferential direction of the shaft, and the shaft is constrained together to suppress the movement of the shaft in the radial and / or axial directions. This makes the rotation center of the rotor as consistent as possible with the center line of the shaft system, thereby alleviating the problem of shaft jumping and swaying during rotation and ensuring the stability and reliability of the current collection device. Attached Figure Description

[0022] The above and other objects and features of this utility model will become clearer from the following description of embodiments in conjunction with the accompanying drawings, in which:

[0023] Figure 1 and Figure 2 These are schematic cross-sectional views of the current collector according to an embodiment of the present utility model.

[0024] Figure 3 This is a schematic diagram of the connection structure of the bearing assembly and guide plate of the current collector according to an embodiment of the present utility model;

[0025] Figure 4This is a schematic diagram of the connection structure between the bearing assembly and the upper cover plate of the current collector according to an embodiment of the present utility model;

[0026] Figure 5 This is a schematic diagram of the connection structure of the guide plate and bearing assembly of the current collector according to an embodiment of the present utility model;

[0027] Figure 6 This is a schematic diagram of the bearing assembly installation structure of the current collector according to an embodiment of the present utility model;

[0028] Figure 7 This is a schematic diagram of the bearing structure of the current collector according to an embodiment of the present utility model;

[0029] Figure 8 This is a partial structural schematic diagram of the bearing assembly of the current collector according to an embodiment of the present utility model;

[0030] Figure 9 and Figure 10 These are schematic diagrams of the guide disk of the current collector according to an embodiment of the present utility model;

[0031] Figure 11 and Figure 12 These are schematic diagrams showing the connection structure of the rotating shaft and the support base of the current collector according to an embodiment of the present utility model.

[0032] Symbol Explanation

[0033] 10. Support base; 11. Base plate; 12. Top cover plate;

[0034] 20. Shaft; 21. Connecting flange;

[0035] 30. Guide plate; 31. Connecting hole; 32. Mounting hole; 33. Outer periphery;

[0036] 40. Bearing assembly; 41. Mounting base; 42. Bearing; 421. Inner ring; 422. Outer ring; 423. First rolling element; 424. Oil seal end cap; 43. Elastic element; 44. Positioning shaft; 441. First slot; 45. Adjusting nut; 451. Second slot; 46. Stop; 461. Connecting ring; 462. First pin; 463. Second pin;

[0037] 50. Slewing support; 51. Outer ring plate; 52. Inner ring plate; 53. Second rolling element;

[0038] 60. Roller. Detailed Implementation

[0039] The following detailed descriptions are provided to aid the reader in gaining a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will become apparent upon understanding this disclosure. For example, the order of operations described herein is merely illustrative and is not limited to those orders set forth herein, but may be altered as will become clear upon understanding this disclosure, except for operations that must occur in a specific order. Furthermore, for clarity and conciseness, descriptions of features known in the art may be omitted.

[0040] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided only to illustrate some of the many possible ways of implementing the methods, apparatus and / or systems described herein, many of which will become clear upon understanding the disclosure of this utility model.

[0041] As used herein, the term “and / or” includes any one of the associated listed items and any combination of any two or more.

[0042] Although terms such as “first,” “second,” and “third” may be used herein to describe various components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts should not be limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Thus, without departing from the teaching of the examples described herein, the first component, first assembly, first region, first layer, or first part referred to as the first component, first assembly, first region, first layer, or first part may also be referred to as the second component, second assembly, second region, second layer, or second part.

[0043] In the specification, when an element such as a layer, region, or substrate is described as being "on" another element, "connected to," or "mounted to" another element, the element may be directly "on" another element, directly "connected to," or "mounted to" the other element, or one or more other elements may be present in between. Conversely, when an element is described as being "directly on" another element, "directly connected to," or "directly mounted to" another element, no other elements may be present in between.

[0044] The terminology used herein is for describing various examples only and is not intended to limit the invention. Unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well. The terms “comprising,” “including,” and “having” indicate the presence of the described features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof. The term “a plurality” represents any quantity of two or more.

[0045] The directional terms "upper," "lower," "inner," and "outer" used in this invention are all based on the orientation of the current collector when it is in normal operating condition. This definition method will help ensure that readers or users can clearly understand the relative positional relationships of the various components and functions, and should not be construed as a limitation of this invention.

[0046] Unless otherwise defined, all terms used herein, including technical and scientific terms, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains after understanding the invention. Unless expressly defined herein, terms such as those defined in a general dictionary shall be interpreted as having a meaning consistent with their meaning in the context of the relevant field and in this invention, and shall not be interpreted in an idealized or overly formalistic manner.

[0047] Furthermore, in the description of the examples, detailed descriptions of well-known related components or functions will be omitted when it is believed that such detailed descriptions would lead to a vague interpretation of the present invention.

[0048] In existing technologies, an unstable shaft can lead to poor contact between the current collector and the brush holder, resulting in abnormal phenomena such as sparks and arcs, affecting the stable transmission of current. Furthermore, an unstable shaft can increase friction between the current collector and the brushes, leading to greater energy loss and heat accumulation. This additional energy loss and heat accumulation not only reduces motor efficiency but can also damage the motor's insulation performance. Moreover, an unstable shaft can cause increased motor vibration, higher noise levels, and even malfunctions leading to shutdowns.

[0049] According to this application, by centering the shaft, good contact can be ensured among the various parts of the current collector, guaranteeing stable current transmission. Furthermore, it reduces energy loss and heat buildup, improves motor operating efficiency and reliability, and extends the service life of both the current collector and the motor. In addition, by improving shaft stability, motor vibration and noise levels can be significantly reduced, further enhancing motor operating efficiency and reliability.

[0050] The following will combine Figures 1 to 12The present invention will now introduce the current collection device provided in the embodiments of this utility model.

[0051] According to an embodiment of the present invention, a current collector is provided, wherein, as... Figures 1 to 4 As shown, the current collector includes a support base 10, a rotating shaft 20, and multiple bearing assemblies 40. The rotating shaft 20 is rotatably mounted on the support base 10. The multiple bearing assemblies 40 are respectively disposed in the circumferential direction of the rotating shaft 20, fixedly connected to the support base 10, and in contact with the outer periphery of the rotating shaft 20. When the rotating shaft 20 rotates, the multiple bearing assemblies 40 can rotate with the rotating shaft 20 to at least suppress movement of the rotating shaft 20 in the radial and / or axial directions.

[0052] According to the current collector provided in the embodiments of this application, when the rotating shaft 20 rotates on the support base 10, multiple bearing assemblies 40 will rotate accordingly. Through the coordinated action of multiple bearing assemblies 40, necessary auxiliary support is provided in the circumferential direction of the rotating shaft 20, and the rotating shaft 20 is constrained together to suppress the movement of the rotating shaft 20 in the radial and / or axial directions, so that the rotation center of the rotor is as consistent as possible with the center line of the shaft system, thereby alleviating the problem of jumping and swaying of the rotating shaft during rotation and ensuring the stability and reliability of the current collector.

[0053] According to this application, the shaft 20 is a hollow structure. The hollow shaft can reduce weight, improve heat dissipation performance, and reduce manufacturing costs, thereby helping to improve the overall efficiency and reliability of the wind turbine.

[0054] According to this application, the bearing assembly 40 is configured as at least two groups, arranged at intervals in the circumferential direction of the rotating shaft 20. Specifically, the bearing assembly 40 may include three or four groups.

[0055] For wind turbine generator sets, the maintenance of the shaft 20 is relatively difficult. Therefore, according to this application, a component installed on the outer wall of the shaft 20 is used as the contact end between the bearing assembly 40 and the shaft 20.

[0056] In some embodiments, a guide disk 30 is fixedly disposed on the outer periphery of the rotating shaft 20. The guide disk 30 is sleeved on and fixed to the rotating shaft 20, and is coaxially disposed with the rotating shaft 20. The guide disk 30 slides in contact with a plurality of bearing assemblies 40. As an example, the guide disk has an annular structure, with its inner peripheral side tightly fitted with the outer surface of the rotating shaft 20 (rotor) for a secure connection, and its outer peripheral side 33 sliding in contact with the bearing assembly 40.

[0057] Specifically, the material of the guide plate can be set based on the actual situation. For example, the guide plate can be made of aluminum alloy. The guide plate formed by aluminum alloy has certain corrosion resistance and strength, which can reduce the weight of the current collector and is easy to process and shape.

[0058] In these embodiments, when the shaft 20 rotates on the support 10, the guide disk 30 rotates accordingly and maintains sliding contact with the bearing assembly 40. Due to the presence of the guide disk 30, the shaft 20 itself no longer directly slides in contact with the bearing assembly 40. The guide disk 30 bears the sliding friction and wear that were originally directly borne by the shaft 20, protecting the shaft 20 itself and facilitating later maintenance and replacement, thereby reducing maintenance difficulty.

[0059] like Figure 9 and Figure 10 As shown, the guide plate 30 is generally an annular plate, which is fitted onto the rotating shaft 20 through mounting holes 32. Multiple connection holes 31 are provided on the annular plate for mounting other components. For example, sensors can be mounted on the guide plate to monitor parameters such as rotor speed and temperature; or actuators can be mounted to drive the rotor to rotate. Alternatively, it can serve as a connector to link other mechanical components (such as transmission devices, loads, etc.) to the rotor. The outer peripheral side 33 of the guide plate 30 contacts the bearing assembly 40.

[0060] In some embodiments, the guide disc 30 makes point contact with the bearing in the bearing assembly, resulting in a relatively small contact area, which helps reduce frictional resistance between the two. Lower frictional resistance not only helps reduce energy consumption but also improves the operating efficiency of the equipment. Furthermore, point contact reduces wear between the guide disc and the bearing, extending the service life of the current collector.

[0061] In some embodiments, the bearing assemblies 40 are configured as at least two groups, arranged at intervals in the circumferential direction of the guide disk 30.

[0062] According to this application, the bearing assembly 40 can suppress the movement of the rotating shaft 20 in the radial and / or axial directions. Specifically, the outer ring of the bearing in each bearing assembly 40 can be tightly fitted with the outer peripheral side 33 of the guide disk 30. Since the pressing force of each bearing assembly on the guide disk 30 is continuous and adjustable, the movement of the rotating shaft 20 in the radial and / or axial directions can be suppressed through the synergistic effect of multiple bearing assemblies. More specifically, when the bearing 42 of each bearing assembly 40 is pressed by the elastic element 43, its outer ring 422 will tightly abut against the outer periphery of the guide disk 30, allowing the pressure to be distributed on the rotating shaft 20, making the position of the rotating shaft 20 relatively stable. This helps to reduce the vibration and displacement of the guide disk 30 during operation. Since the guide disk and the rotating shaft are concentrically arranged and connected, the centering function of the rotating shaft 20 can be achieved.

[0063] According to this application, the guide plate 30 is sleeved on the rotating shaft 20 and connected to the outer side wall of the rotating shaft 20. The bearing assembly 40 includes a mounting base 41, a positioning shaft 44, a bearing 42, and an elastic element 43. The mounting base 41 is fixed to the support base 10, the positioning shaft 44 is fixed to the mounting base 41, the bearing 42 is sleeved on the positioning shaft 44, and the elastic element 43 is compressedly disposed between the mounting base 41 and the bearing 42, so that the bearing 42 can move axially on the positioning shaft 44 to abut against the outer periphery of the guide plate 30, and the bearing 42 squeezes the guide plate 30, thereby ensuring the stability of the position of the guide plate 30 and realizing the centering of the rotating shaft.

[0064] like Figure 2 , Figures 4 to 7 As shown, the mounting base 41 is fixed to the support base 10, and the positioning shaft 44 provides axial positioning for the bearing 42 to ensure that the bearing 42 does not deviate from its predetermined trajectory when rotating. The positioning shaft 44 is fixed to the mounting base 41 in the axial direction, and the bearing 42 is sleeved on the positioning shaft 44 and can move on the positioning shaft 44. The bearing 42 includes an inner ring 421, an outer ring 422, and a first rolling element 423 disposed between the inner ring 421 and the outer ring 422. The outer surface of the outer ring 422 of the bearing 42 is flush with the guide. The bearing 42 is movably connected to the positioning shaft 44 by the contact of the bearing 30, allowing the bearing 42 to move on the positioning shaft 44. The elastic element 43 is compressed between the mounting base 41 and the end face of the inner ring 421 of the bearing 42, which can provide a clamping force for the bearing 42 to press against the guide disk 30, so that the bearing 42 of each bearing assembly 40 is always in stable contact with the guide disk 30, and the guide disk 30 is pressed against the guide disk 30 in the circumferential direction with a predetermined clamping force, thereby realizing the centering function of the rotating shaft 20.

[0065] In these embodiments, when the shaft 20 rotates, the guide disc 30 rotates accordingly. Under the preload of the elastic element 43, each bearing 42 always tightly presses against the guide disc 30, thereby suppressing the movement of the guide disc 30 in the radial and / or axial directions and ensuring the stability of the shaft 20. Furthermore, during long-term use, due to friction and wear, the contact surface between the guide disc 30 and the bearing 42 may gradually wear down, creating gaps. The elastic element can compensate for these gaps in a timely manner through its deformation, thereby maintaining close contact between the guide disc 30 and the bearing 42. This ensures that the rotation center of the shaft is as aligned as possible with the centerline of the shaft system, reducing deviations and vibrations of the shaft during operation.

[0066] According to this application, the bearing 42 is in close contact with the guide disk 30. By applying a compressive force containing radial and axial components to the bearing 42, the compressive force can be transmitted to the guide disk 30 due to the inclined surface fit between the bearing and the guide disk, and can be decomposed into radial compressive force and axial compressive force. Thus, the multiple bearing assemblies 40 can suppress the movement of the guide disk 30 in the radial and axial directions, ensuring the stability of the current collector.

[0067] Specifically, the elastic element 43 can be a spring, an elastic washer, etc. The spring can specifically be a wave spring with a wavy cross section, which can provide a large elastic deformation in a small space.

[0068] In some embodiments, the elastic member 43 can cause the bearing 42 to press the guide disk 30 toward a first direction, wherein the first direction is a direction inclined relative to the radial direction of the guide disk 30, or a direction inclined downward relative to the radial direction of the guide disk 30.

[0069] In these embodiments, the elastic element 43 can apply a compressive force to the bearing 42 in a first direction. Since the compressive force is inclined relative to the radial direction of the guide disk 30, it can be inclined in the radial direction or inclined downward relative to the radial direction. Since the bearing 42 abuts against the guide disk, the compressive force is also transmitted to the guide disk and is decomposed into radial and axial components. The radial component is used to suppress the left and right swing of the guide disk 30, and the axial component is used to suppress the up and down jump of the guide disk 30, thereby ensuring that the position of the guide disk 30 is relatively stable. Since the rotating shaft 20 and the guide disk 30 are concentrically arranged, the position of the rotating shaft 20 is also relatively stable.

[0070] According to this application, the outer ring of the guide disk 30 and the bearing 42 are fitted with an inclined surface. The outer side wall of one of the guide disk 30 and the outer ring of the bearing 42 has an upward and outward inclined surface or a downward and outward inclined surface, and the outer side wall of the other of the guide disk 30 and the outer ring of the bearing 42 is an arc surface. The arc surface and the inclined surface fit together, so that the bearing 42 presses the guide disk 30 in the first direction.

[0071] like Figure 5 As shown, the outer wall of the guide disc 30 has an upward and outward inclined surface, and the outer wall of the outer ring of the bearing 42 is an arc surface. The bearing assembly 40 is located below the inclined surface. When the bearing 42 is subjected to a compressive force applied in the axial direction by the elastic element 43, the compressive force is transmitted towards the inclined surface of the guide disc 30. This axial compressive force is decomposed into radial and axial forces on the downward and outward inclined surface, causing the guide disc to be subjected to radial and axial compression, thereby helping to suppress the left-right swaying and up-down jump of the shaft. In addition, the contact area of ​​the inclined surface and the arc surface is small, which can reduce friction loss.

[0072] It should be noted that if the slope of the outer wall of the guide plate 30 is upward and outward, the bearing assembly can be positioned below the slope and press the guide plate 30 upward; if the slope of the outer wall of the guide plate 30 is downward and outward, the bearing assembly can be positioned above the slope and press the guide plate 30 downward.

[0073] In this embodiment, the inclined surface can be continuous along the circumferential direction of the guide disk, making the guide disk a hollow cone or a hollow inverted cone. The continuous inclined surface not only enhances the structural strength of the guide disk, but also meets the rotation requirements, ensuring that the guide disk can be subjected to compressive force at all times during rotation to operate evenly and stably, thereby improving the stability and reliability of the entire bearing assembly.

[0074] During the long-term contact and relative rotation between the bearing assemblies and the guide plate, gaps may be generated due to wear. Some bearing assemblies may fail to perform their supporting function. Considering the convenience of assembly and the ease of later operation and maintenance, adjustment components (e.g., adjustment nut 45) can be set in advance so that the elastic compressive force of the elastic element 43 can be easily adjusted after the bearing assembly is installed, so that the bearing 42 and the guide plate 30 can always be in contact with the predetermined clamping force.

[0075] In some embodiments, the bearing assembly 40 further includes an adjusting nut 45 threaded onto the positioning shaft 44, and an elastic element 43 is compressively disposed between the adjusting nut 45 and the bearing 42. By turning the adjusting nut 45, the elastic compressive force of the elastic element 43 can be adjusted so that the bearing 42 abuts against the guide plate 30 with a predetermined clamping force.

[0076] In these embodiments, when the elastic compressive force increases, the contact pressure between the bearing and the surrounding structure also increases, and the centering strength is enhanced, improving the stability and reliability of the mechanical system; conversely, when the elastic compressive force decreases, the centering strength weakens accordingly. By turning the adjusting nut 45, the degree of compression of the elastic element 43 between the adjusting nut 45 and the bearing 42 can be changed, thereby altering the elastic compressive force exerted by the elastic element 43 on the bearing 42, thus affecting the contact pressure between the bearing 42 and the surrounding structure (such as the guide plate or shaft), ensuring the centering strength. Thus, during assembly, the position and compressive force of the bearing 42 can be adjusted by turning the adjusting nut 45 to ensure close contact with the guide plate 30. During operation and maintenance, if the gap between the bearing 42 and the guide plate 30 increases due to wear, simply turning the adjusting nut 45 will restore contact, eliminating the need to replace the entire bearing assembly. This not only reduces maintenance costs but also minimizes downtime and improves the availability and production efficiency of the current collector.

[0077] During operation, current collectors often experience vibration or swaying due to environmental conditions and mechanical operation. This dynamic environment poses a challenge to the stability of the adjusting nut, potentially causing it to loosen or even break, thus affecting the performance and safety of the entire current collector. Therefore, the bearing assembly 40 of the current collector in this application is provided with a stop 46.

[0078] In some embodiments, the stop 46 is disposed on the positioning shaft 44 and can connect the positioning shaft 44 and the adjusting nut 45 to restrict the adjustment nut 45 from rotating relative to the positioning shaft 44, and / or the stop 46 can move in the axial direction of the positioning shaft 44 to unlock the adjusting nut 45.

[0079] In these embodiments, the stop 46 connects the positioning shaft 44 and the adjusting nut 45 to restrict the rotation of the adjusting nut 45 relative to the positioning shaft 44. This means that even under strong vibration or swaying conditions, the adjusting nut can maintain its initial position and is less prone to loosening or displacement, thereby preventing the bearing from falling off after prolonged use, ensuring a stable compressive force on the bearing, and improving the safety and reliability of the bearing assembly 40. Furthermore, the stop 46 can also move axially along the positioning shaft 44, facilitating the adjustment of the adjusting nut 45. When adjustment of the adjusting nut 45 is required, the stop 46 can be pushed in the opposite direction to the adjusting nut 45, allowing the adjusting nut 45 to unlock and rotate freely. The degree of compression of the elastic element can then be adjusted by turning the adjusting nut 45. Moreover, the stop 46 is flexible and movable, eliminating the need for complex disassembly.

[0080] like Figure 8 As shown, the surface of the positioning shaft 44 is provided with a first slot 441 extending vertically, and the outer surface of the adjusting nut 45 is provided with a second slot 451. The stop part 46 includes a connecting ring 461, at least one first pin 462 extending from the inner circumference of the connecting ring 461, and at least one second pin 463 extending obliquely from the outer circumference of the connecting ring 461. The connecting ring 461 is sleeved on the positioning shaft 44 and is located between the elastic member 43 and the adjusting nut 45. The first pin 462 is inserted into the first slot 441 and can move up and down in the first slot 441. The second pin 463 can be inserted into or disengaged from the second slot 451. When the second pin 463 is inserted into the second slot 451, it can restrict the rotation of the adjusting nut 45 relative to the positioning shaft 44. When the second pin 463 is disengaged from the second slot 451, it can unlock the adjusting nut 45.

[0081] Specifically, when the second pin 463 is inserted into the second slot 451 of the adjusting nut 45, the stop part 46 securely locks the adjusting nut 45 onto the positioning shaft 44, preventing it from loosening or being damaged due to vibration or wobbling. When it is necessary to adjust the adjusting nut 45, simply move the first pin 462 of the stop part 46 upward in the first slot 441, causing the second pin 463 to be pulled out of the second slot 451. At this time, the adjusting nut 45 can rotate freely for the required adjustment.

[0082] It should be noted that the stop part in this application is not limited to this. A stop part that cannot be unlocked after installation can also be set. When maintenance is required, a special tool can be used to loosen the stop part, and then a new stop part can be replaced after adjusting the adjusting nut 45.

[0083] In some embodiments, the rotation of the inner ring 421 of the bearing 42 relative to the positioning shaft 44 can be limited by extending the first slot 441. Specifically, the first slot 441 can be extended to the positioning shaft 44 corresponding to the contact portion between the inner ring 421 of the bearing 42 and the positioning shaft 44. The first slot 441 will increase the friction between the inner ring 421 of the bearing 42 and the positioning shaft 44, thereby preventing the rotation of the inner ring 421 relative to the positioning shaft 44 from being affected when the outer ring 422 of the bearing 42 rotates with the guide plate 30.

[0084] In some embodiments, the upper end of the positioning shaft 44 is connected to the support base 10, and the lower end of the positioning shaft 44 is connected to the mounting base 41. This ensures the stability of the positioning shaft 44, increases the rigidity of the bearing assembly 40, and makes the structure less prone to deformation under load. In addition, it also allows for higher adjustment precision of the bearing assembly 40.

[0085] According to this application, the current collector further includes a rotary support 50, which is disposed between the support base 10 and the rotating shaft 20. The rotary support 50 includes an outer ring plate 51 and an inner ring plate 52 that can rotate relative to each other. One of the outer ring plate 51 and the inner ring plate 52 can be fixedly connected to the support base 10, and the other of the outer ring plate 51 and the inner ring plate 52 can be fixedly connected to the rotating shaft 20, so that the rotating shaft 20 can rotate relative to the support base 10.

[0086] In these embodiments, the rotatable connection between the rotating shaft 20 and the support base 10 is achieved by providing a slewing support 50, which makes the rotation of the rotating shaft 20 more flexible and allows it to rotate stably on the support base 10.

[0087] like Figure 11 and Figure 12As shown, the rotary support 50 includes an outer ring plate 51 and an inner ring plate 52. The outer ring plate 51 is fixedly connected to the support base 10. The inner ring plate 52 is disposed inside the outer ring plate 51 and is fixedly connected to the lower end of the rotating shaft 20. The second rolling element 53 is disposed between the outer ring plate 51 and the inner ring plate 52, so that the inner ring plate 52 can rotate relative to the outer ring plate 51.

[0088] As an example, the second rolling element 53 may be a ball, a roller or other rolling element.

[0089] In these embodiments, the outer ring plate 51 provides stable support, while the inner ring plate 52 forms rolling contact with the outer ring plate 51 through the second rolling element 53, so that the inner ring plate 52 can rotate relative to the outer ring plate 51, thereby realizing the function of rotating shaft 20 relative to support base 10.

[0090] In some embodiments, a connecting flange 21 is fixedly connected to the lower end of the rotating shaft 20, for example, by means of bolts, welding or the like. The inner ring plate 52 is fixed to the connecting flange 21, and the connecting flange 21 is slidably supported on the outer ring plate 51.

[0091] In these embodiments, the sliding of the connecting flange 21 on the outer ring plate 51 allows the rotating shaft 20 to have a certain sliding support during rotation, improving its rotational flexibility. The sliding support can reduce friction and wear between the connecting flange 21 and the outer ring plate 51, extending the service life of the slewing support 50.

[0092] In some embodiments, the rotating shaft 20 and the connecting flange 21 are tenon-and-mortise connected. This tenon-and-mortise connection is stable, not easily loosened, and well-suited to the requirements of instantaneous kinetic energy transfer. When the rotating shaft 20 is subjected to external torque, the tenon-and-mortise connection ensures that the rotor flange rotates quickly and accurately with the shaft, thereby achieving kinetic energy transfer. Simultaneously, because the connection is not easily loosened, maintenance costs are relatively low. Furthermore, the tightness and stability of the tenon-and-mortise connection contribute to improving the performance and reliability of the entire rotary support 50, thereby extending the service life of the current collector.

[0093] In some embodiments, a plurality of rollers 60 are mounted on the upper surface of the outer ring plate 51, and the connecting flange 21 is rolledly supported on the plurality of rollers 60. Specifically, the rollers 60 are bolt rollers, which are evenly distributed on the outer ring plate 51 to provide uniform support force.

[0094] In these embodiments, the roller 60, as a rolling element, is mounted on the upper surface of the outer ring plate 51 to support the sliding or rotation of the connecting flange 21. The rolling contact reduces friction, thereby improving support strength and rotational flexibility.

[0095] In some embodiments, the support base 10 includes a base plate 11 and an upper cover plate 12, wherein the base plate 11 is the bottom structure of the support base 10, and the upper cover plate 12 is connected above the base plate 11. A receiving space is provided between the base plate 11 and the upper cover plate 12, and a bearing assembly 40 is disposed in the receiving space and fixed to the lower surface of the upper cover plate 12 for necessary protection and support. The lower end of the rotating shaft 20 is rotatably mounted on the base plate 11, and the upper end of the rotating shaft 20 can extend from the upper cover plate to facilitate the installation of other upper components of the wind turbine generator set (e.g., cables).

[0096] In some embodiments, the bearing assembly 40 can be exposed to the outside of the mounting base 41, which can improve heat dissipation or facilitate maintenance and replacement.

[0097] In some embodiments, the bearing assembly 40 is a rolling bearing or a sliding bearing having a steel oil seal end cap 424 on its end face.

[0098] In these embodiments, the steel oil seal end cap 424 effectively prevents lubricant (such as grease or lubricating oil) from leaking out of the bearing, while also preventing external contaminants (such as water, dust, etc.) from entering the bearing. The steel oil seal end cap 424 provides a degree of protection for the bearing, reducing damage caused by external impacts or vibrations. The high strength and durability of the steel material ensure that the oil seal end cap maintains stable performance during long-term use.

[0099] According to this application, the bearing can be a rolling bearing or a sliding bearing. Rolling bearings have a lower coefficient of friction and higher load-carrying capacity, making them suitable for applications requiring high-speed rotation and bearing large radial or axial loads. Sliding bearings are suitable for low-speed, heavy-load applications or applications requiring large impact loads. Regarding the type of bearing, those in the art can choose based on actual needs, and this application does not impose excessive limitations in this regard.

[0100] According to a second aspect of this application, a wind turbine generator set is provided, wherein the wind turbine generator set includes a tower, a nacelle mounted on the tower, and the aforementioned current collection device disposed in the tower, the rotating shaft of the current collection device being connected to the nacelle and capable of rotating with the rotation of the nacelle, and the support base of the current collection device being fixedly connected to the tower.

[0101] In these embodiments, the wind turbine generator achieves stable power transmission during rotation through a rotating shaft connected to the nacelle and a support base fixedly connected to the tower.

[0102] While the embodiments of the present invention have been described in detail above, those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope thereof. However, it should be understood that, in the view of those skilled in the art, these modifications and variations will still fall within the spirit and scope of the embodiments of the present invention as defined in the claims.

Claims

1. A current collector, characterized in that, The current collection device includes: Support base (10); A rotating shaft (20) is rotatably mounted on the support base (10); Multiple bearing assemblies (40) are respectively disposed on the radial outer side of the rotating shaft (20), fixedly connected to the support base (10), and in contact with the outer periphery of the rotating shaft (20). When the rotating shaft (20) rotates, the multiple bearing assemblies (40) can rotate with the rotating shaft (20) to suppress the rotating shaft (20) from moving in the radial and / or axial directions.

2. The current collection device according to claim 1, characterized in that, A guide disk (30) is fixedly provided on the outer periphery of the rotating shaft (20). The guide disk (30) is sleeved on the rotating shaft (20), coaxially arranged with the rotating shaft (20), and slides in contact with the multiple bearing assemblies (40).

3. The current collector according to claim 2, characterized in that, The bearing assembly (40) includes: Mounting base (41), which is fixed to the support base (10); The positioning shaft (44) is fixed to the mounting base (41). Bearing (42), the bearing (42) is sleeved on the positioning shaft (44); An elastic element (43) is compressively disposed between the mounting base (41) and the bearing (42), such that the bearing (42) can move axially on the positioning shaft (44) to abut against the outer periphery of the guide disk (30), and cause the bearing (42) to press against the guide disk (30).

4. The current collector according to claim 3, characterized in that, The elastic element (43) enables the bearing (42) to press the guide disk (30) toward a first direction, wherein the first direction is a direction inclined relative to the radial direction of the guide disk (30), or a direction inclined downward relative to the radial direction of the guide disk (30).

5. The current collector according to claim 4, characterized in that, The outer side wall of one of the outer rings of the guide disc (30) and the bearing (42) has an upward and outward inclined surface or a downward and outward inclined surface, and the outer side wall of the other of the outer rings of the guide disc (30) and the bearing (42) is an arc surface. The arc surface and the inclined surface cooperate to make the bearing (42) press the guide disc (30) in a first direction.

6. The current collector according to claim 3, characterized in that, The bearing assembly (40) also includes: Adjusting nut (45) is threaded onto the positioning shaft (44); The elastic element (43) is compressed between the adjusting nut (45) and the bearing (42). By turning the adjusting nut (45), the elastic extrusion force of the elastic element (43) can be adjusted so that the bearing (42) abuts against the guide plate (30).

7. The current collector according to claim 6, characterized in that, The bearing assembly (40) also includes: A stop (46) is provided on the positioning shaft (44) and can connect the positioning shaft (44) and the adjusting nut (45) to restrict the adjustment nut (45) from rotating relative to the positioning shaft (44); and / or, the stop (46) can move in the axial direction of the positioning shaft (44) to unlock the adjusting nut (45).

8. The current collector according to claim 7, characterized in that, The positioning shaft (44) has a first slot (441) extending vertically on its surface, and the adjusting nut (45) has a second slot (451) on its outer surface. The stop (46) includes a connecting ring (461), at least one first pin (462) extending from the inner circumference of the connecting ring (461), and at least one second pin (463) extending obliquely from the outer circumference of the connecting ring (461). The connecting ring (461) is sleeved on the positioning shaft (44) and located between the elastic member (43) and the adjusting nut (45). The first pin (462) is inserted into the first slot (441) and can move up and down in the first slot (441). The second pin (463) can be inserted into or removed from the second slot (451).

9. The current collector according to claim 3, characterized in that, The upper end of the positioning shaft (44) is connected to the support base (10), and the lower end of the positioning shaft (44) is connected to the mounting base (41).

10. The current collector according to any one of claims 1 to 9, characterized in that, The current collector further includes a rotary support (50), which includes an outer ring plate (51) and an inner ring plate (52) that are rotatable relative to each other. One of the outer ring plate (51) and the inner ring plate (52) is fixedly connected to the support base (10), and the other of the outer ring plate (51) and the inner ring plate (52) is fixedly connected to a rotating shaft (20), so that the rotating shaft (20) can rotate relative to the support base (10).

11. The current collector according to claim 10, characterized in that, The slewing support (50) includes: The outer ring plate (51) is fixedly connected to the support base (10); The inner ring plate (52) is disposed on the inner side of the outer ring plate (51) and is fixedly connected to the lower end of the rotating shaft (20); The second rolling element (53) is disposed between the outer ring plate (51) and the inner ring plate (52), so that the inner ring plate (52) can rotate relative to the outer ring plate (51).

12. The current collector according to claim 11, characterized in that, The lower end of the rotating shaft (20) is fixedly connected to a connecting flange (21), the inner ring plate (52) is fixed to the connecting flange (21), and the connecting flange (21) is slidably supported on the outer ring plate (51).

13. The current collector according to claim 12, characterized in that, The rotating shaft (20) and the connecting flange (21) are tenon-and-mortise connected; and / or, The upper surface of the outer ring plate (51) is equipped with a plurality of rollers (60), and the connecting flange (21) is rolledly supported on the plurality of rollers (60).

14. The current collector according to claim 1, characterized in that, The support base (10) includes: Base plate (11); The upper cover plate (12) is connected above the base plate (11); There is a receiving space between the base plate (11) and the upper cover plate (12), the bearing assembly (40) is disposed in the receiving space, and the bearing assembly (40) is mounted on the lower surface of the upper cover plate (12); the lower end of the rotating shaft (20) is rotatably disposed on the base plate (11), and the upper end of the rotating shaft (20) can extend out from the upper cover plate (12).

15. The current collector according to claim 3, characterized in that, The bearing (42) is a rolling bearing or a sliding bearing with a steel oil seal end cap (424) on the end face.

16. A wind turbine generator set, characterized in that, The wind turbine generator set includes a tower, a nacelle mounted on the tower, and a power collection device according to any one of claims 1 to 15 disposed in the tower, wherein the rotating shaft (20) of the power collection device is connected to the nacelle, and the support base (10) of the power collection device is fixedly connected to the tower.

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