Conductive elastic sheet, stator mechanism and current collection device
By designing conductive shrapnel for wind power generation equipment, the maintenance difficulties and high maintenance costs caused by local heating and carbon brush wear of conductive slip rings are solved, and high current conduction, low linear loss and temperature rise, stable structure and long service life are achieved.
Patent Information
- Application Number
- CN202421521966.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The conductive slip rings in existing wind power plants are difficult to maintain and have high maintenance costs due to local heating and wear of carbon brushes.
A conductive shrapnel is designed, including a substrate, a first elastic arm, a second elastic arm, a first bend and a second bend, through these structures, and to provide support and conductivity between the stator mechanism and the rotor mechanism.
High current conduction is achieved, line loss and temperature rise are reduced, structural stability and service life are improved, and maintenance needs are reduced.
Smart Images
Figure CN222980855U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wind power generation, and particularly relates to a conductive elastic sheet, a stator mechanism and a current collecting device applying the conductive elastic sheet. Background Art
[0002] Due to the particularity of the wind power generation field, local heating will inevitably occur during the operation of the conductive slip ring, resulting in too high temperature inside the conductive slip ring; in addition, the existing conductive slip ring structure needs to be frequently overhauled and maintained to ensure the stable operation of the conductive slip ring. The conductive mode of the conductive slip ring is often through carbon brushes, such as the carbon brush rotates and abuts against the metal or the carbon brush rotates and abuts against the carbon brush to realize the dynamic transmission of current. However, the carbon brushes are severely worn and need to be frequently replaced. The wind power generation equipment is large in size, and there are problems of difficult maintenance and high maintenance cost.
[0003] Therefore, there is an urgent need for a conductive structure that can withstand high current, has low line loss, low temperature rise, stable structure, long service life, and less overhaul and maintenance. Summary of the Utility Model
[0004] In view of the above deficiencies of the prior art, the utility model provides a conductive elastic sheet, a stator structure and a current collecting device applicable to the yaw field of a wind turbine, which have the advantages of withstanding high current, being simple and convenient, having low cost, high stability and long service life.
[0005] To achieve the above object, the utility model provides a conductive elastic sheet for conductive connection. The conductive elastic sheet includes a substrate, a first elastic arm, a second elastic arm, a first bending part and a second bending part. The upper half of one side of the substrate extends outward and upward to form the first elastic arm, the free end of the first elastic arm extends and bends to form the first bending part, the lower half of the other side of the substrate extends outward and upward to form the second elastic arm, and the free end of the second elastic arm extends and bends to form the second bending part.
[0006] Preferably, a fixing hole is provided on the substrate.
[0007] The utility model also provides a stator mechanism, which includes a plurality of stator layers. Each stator layer includes a plurality of stator rings, a plurality of stator terminal rows and a plurality of the conductive elastic sheets. The conductive elastic sheets are fixedly installed on the stator rings, and each stator layer is provided with a conductive surface.
[0008] Preferably, the stator ring includes a stator mounting ring and a stator fixing ring. The conductive elastic sheet is fixedly installed on the stator mounting ring, and the stator fixing ring is fixedly connected to the upper surface of the stator mounting ring.
[0009] Preferably, a plurality of through holes are formed in the stator fixing ring, and a plurality of stator terminal rows pass through the through holes and are fixedly connected to the stator mounting ring.
[0010] Preferably, a plurality of the stator layers are arranged at intervals in concentric circles, and a gap is formed between two adjacent stator layers.
[0011] Preferably, a plurality of the conductive elastic pieces as described above are mounted on the stator mounting ring, the substrate is mounted on the stator mounting ring, and the substrates of the conductive elastic pieces are arranged in contact along the tangential direction of the outer circumference of the stator mounting ring.
[0012] The present utility model further provides a current collecting device, and the current collecting device includes:
[0013] a stator mechanism, including the stator mechanism as described above;
[0014] a rotor mechanism, the rotor mechanism includes a plurality of rotor layers, each rotor layer includes a plurality of rotor rings and a plurality of rotor terminal rows, and each rotor layer is provided with a contact surface;
[0015] a conductive elastic piece, the conductive elastic piece is located between the rotor layer and the stator layer;
[0016] Wherein, one rotor layer and one stator layer are respectively in rotational abutment with the conductive elastic piece to electrically conduct the conductive surface and the contact surface.
[0017] Preferably, the rotor ring includes a rotor fixing ring and a rotor contact ring, and the rotor fixing ring is fixedly connected to the rotor contact ring.
[0018] Preferably, the rotor layer includes a plurality of the rotor terminal rows, the rotor fixing ring and the rotor contact ring, a plurality of through holes are formed in the rotor fixing ring, and a plurality of the rotor terminal rows pass through the through holes and are fixedly connected to the rotor contact ring.
[0019] Preferably, a plurality of the rotor layers are arranged at intervals in concentric circles, and a gap is formed between two adjacent rotor layers.
[0020] The beneficial effects of the present utility model are:
[0021] The substrate of the conductive elastic piece of the present utility model connects the first elastic arm and the second elastic arm, providing support in all rotation directions without jamming during commutation. The first elastic arm and the second elastic arm are asymmetrically arranged on both sides of the substrate respectively, which enables the staggered installation of the conductive elastic pieces, saving installation space and achieving a larger current-carrying capacity. The first elastic arm and the second elastic arm provide support between the rotor mechanism and the stator mechanism, and have a certain elasticity, generating a certain deformation under pressure, so that the first bending part and the second bending part of the conductive elastic piece are in close contact with the rotor contact ring, with good contact and good electrical conductivity. The first bending part and the second bending part are asymmetrically arranged on both sides of the substrate respectively, which can ensure that the conductive elastic piece does not jam during the commutation of the rotation direction of the rotor mechanism, extend its service life, and enhance the stability and safety of the structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.
[0023] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;
[0024] Figure 2 is a schematic structural diagram of the conductive elastic piece of an embodiment of the present utility model;
[0025] Figure 3 is an installation arrangement diagram of the conductive elastic piece of an embodiment of the present utility model;
[0026] Figure 4 is a schematic diagram of the circumferential installation of the conductive elastic piece of an embodiment of the present utility model.
[0027] DESCRIPTION OF THE REFERENCE NUMERALS IN THE DRAWINGS
[0028] 10. Rotor mechanism; 11. Rotor terminal row; 12. Rotor fixing ring; 13. Rotor contact ring; 20. Stator mechanism; 21. Stator mounting ring; 22. Stator fixing ring; 23. Stator terminal row; 3. Conductive elastic piece; 31. Substrate; 32. First elastic arm; 33. First bending part; 34. Second elastic arm; 35. Second bending part; 36. Fixing hole; 37. Notch.
[0029] The realization, functional features and advantages of the object of the present utility model will be further described in conjunction with the embodiments and with reference to the drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model.
[0031] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings), rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific manner, so it cannot be understood as a limitation of the present utility model. If this specific posture changes, the directional indication will also change accordingly.
[0032] In the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0033] In addition, in the present utility model, descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0034] Wind power generation is carried out through wind power generation equipment. The wind power generation equipment at least includes a wind turbine, a generator, and a tower barrel. Wind power generation does not require the use of fuel and does not generate radiation or air pollution.
[0035] Due to the particularity of the wind power generation field, local heating will inevitably occur during the operation of the electrical slip ring, resulting in too high an internal temperature of the electrical slip ring. In addition, the existing structure of the electrical slip ring needs to be frequently overhauled and maintained to ensure its stable operation. The electrical conduction method of the electrical slip ring often conducts electricity through carbon brushes, such as the carbon brush rotating and abutting against a metal or the carbon brush rotating and abutting against another carbon brush to achieve the dynamic transmission of current. However, the carbon brushes wear severely and need to be frequently replaced. The wind power generation equipment is large in size, and there are problems of difficult maintenance and high maintenance costs.
[0036] Therefore, there is a need for an electrical conductive elastic sheet, a stator structure and a current collector device for the yaw field of a wind turbine, which have the advantages of withstanding high current, being simple and convenient, having low cost, high stability and long service life.
[0037] Please refer to Figure 1 and Figure 2 , the present utility model provides an electrical conductive elastic sheet 3, which includes a substrate 31, a first elastic arm 32, a second elastic arm 34, a first bending part 33 and a second bending part 35. The upper half part of one side of the substrate 31 extends outward and upward to form the first elastic arm 32, and the free end of the first elastic arm 32 extends and bends to form the first bending part 33. The lower half part of the other side of the substrate 31 extends outward and upward to form the second elastic arm 34, and the free end of the second elastic arm 34 extends and bends to form the second bending part 35.
[0038] Please refer to Figure 1 and Figure 2 , the substrate of the electrical conductive elastic sheet of the present utility model connects the first elastic arm and the second elastic arm, so that there is support during rotation in different directions and there is no jamming during commutation. The first elastic arm and the second elastic arm are asymmetrically arranged on both sides of the substrate respectively, which can realize the staggered installation of the electrical conductive elastic sheet, not only saving the installation space, but also achieving a larger current-carrying capacity. The first elastic arm and the second elastic arm provide support between the rotor mechanism and the stator mechanism, and at the same time have a certain elasticity, generating a certain deformation under pressure, so that the first bending part and the second bending part of the electrical conductive elastic sheet are closely attached to the rotor contact ring, with good contact and good electrical conductivity. The first bending part and the second bending part are asymmetrically arranged on both sides of the substrate respectively, which can realize that when the rotation direction of the rotor mechanism commutes, the electrical conductive elastic sheet will not jam, can extend its service life, and enhance the stability and safety of the structure.
[0039] During actual implementation, the size of the substrate 31 is selected according to the actual usage situation and will not be specifically limited here.
[0040] During actual implementation, the material of the electrical conductive elastic sheet 3 is not limited to beryllium bronze, and can also include various alloy coppers and other materials. The surface of the bending part of the electrical conductive elastic sheet 3 can be welded or silver contacts can be added, which can increase the electrical conductivity while improving the wear resistance of the elastic sheet, improve the overall performance and extend the service life.
[0041] In actual implementation, the vertical heights of the first elastic arm 32 and the second elastic arm 34 are greater than or equal to the height of the bending portion.
[0042] In actual implementation, a notch 37 can be provided at the connection between the substrate 31 of the conductive elastic sheet 3 and the first elastic arm 32, which can reduce the impact on the overall conductive elastic sheet 3 when the elastic arm is compressed to cause a large degree of deformation.
[0043] In one embodiment, fixing holes 36 are provided on the substrate 31.
[0044] Please refer to Figure 1 、 Figure 2 and Figure 3 , in this embodiment, fixing holes 36 are provided on the substrate 31, which can realize the easy installation of the conductive elastic sheet 3. When problems occur and maintenance is required, it is convenient for disassembly and installation.
[0045] In actual implementation, the number and positions of the fixing holes 36 are not specifically limited, and preferably, there is one fixing hole 36 at the center of the substrate 31.
[0046] The present utility model further provides a stator mechanism 20, which includes a plurality of stator layers. Each stator layer includes a plurality of stator rings, a plurality of stator terminal rows 23, and a plurality of conductive elastic sheets 3. The conductive elastic sheets 3 are fixedly installed on the stator rings, and each stator layer is provided with a conductive surface.
[0047] Please refer to Figure 1 , in this embodiment, the stator mechanism 20 of the present utility model is used for a current collecting device. The stator mechanism 20 includes a plurality of stator layers. Each stator layer includes a stator ring and a stator terminal row 23. The stator ring is the main component of the stator mechanism 20, which ensures the stability of the stator mechanism 20, plays a role of fixing and supporting, and realizes the stable conduction of the stator mechanism 20. Each stator layer is provided with a conductive surface, and the existence of the conductive surface can smoothly realize the conduction of large current.
[0048] In actual implementation, the multiple stator layers in the stator mechanism 20 are coaxially arranged. The number of stator rings in each stator layer is multiple, and the multiple can be two, or three, or more than three stator rings.
[0049] In actual implementation, the stator mechanism 20 includes a plurality of stator layers, and the number of stator layers is preferably 6.
[0050] In one embodiment, the stator ring includes a stator mounting ring 21 and a stator fixing ring 22. The conductive elastic sheet 3 is fixedly installed on the stator mounting ring 21, and the stator fixing ring 22 is fixedly connected to the upper surface of the stator mounting ring 21.
[0051] Please refer to Figure 1, in this embodiment, the stator ring includes a stator mounting ring 21 and a stator fixing ring 22. The stator fixing ring 22 is the main component of the stator mechanism 20, ensuring the stability of the stator mechanism 20 and realizing the stable conduction of the stator mechanism 20.
[0052] In actual implementation, the stator mounting ring 21 and the stator fixing ring 22 are of the same size but different materials.
[0053] In actual implementation, the number of the conductive elastic pieces 3 is not limited, and preferably 20.
[0054] In one embodiment, a plurality of through holes are formed in the stator fixing ring 22, and a plurality of stator terminal rows 23 pass through the through holes and are fixedly connected to the stator mounting ring 21.
[0055] Please refer to Figure 1 , in this embodiment, the stator layer adopts a combined structure. The stator fixing ring 22 is a circular ring with a plurality of through holes, realizing the support and fixation of the stator mechanism 20. The stator mounting ring 21 is a split circular ring and is symmetrically arranged above the stator fixing ring 22. This combined structure can greatly reduce the material consumption and lower the production cost. At the same time, when wear and other problems occur and need to be repaired, it can be quickly disassembled, replaced and repaired.
[0056] In actual implementation, the material of the stator ring is not specifically limited. Preferably, the material of the stator fixing ring 22 is aluminum or stainless steel, and the material of the stator mounting ring 21 is copper.
[0057] In one embodiment, a plurality of stator layers are arranged at concentric circles at intervals, and a gap is formed between adjacent two stator layers.
[0058] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , in this embodiment, the concentric circle arrangement of the stator layers simplifies the structure of the stator mechanism, can effectively utilize the space of the overall structure, realizes the arrangement of as many stator mechanisms as possible in a limited space, improves the conduction efficiency, and improves the heat dissipation effect and heat dissipation capacity.
[0059] In one embodiment, a plurality of conductive elastic pieces 3 as described above are installed on the stator mounting ring 21. The substrate 31 of the conductive elastic piece 3 is installed on the stator mounting ring 21, and the substrates 31 of the conductive elastic pieces 3 are arranged in contact along the tangential direction of the outer circumference of the stator mounting ring 21.
[0060] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4, several conductive elastic pieces 3 are installed on the stator mounting ring 21. The conductive elastic pieces 3 are tightly installed on the stator mounting ring 21, making their overall distribution circular. When the rotor rotates, the bending parts of the conductive elastic pieces 3 are always in contact with the lower surface of the rotor contact ring 13, reducing jamming during operation and extending the service life.
[0061] In actual implementation, the conductive elastic pieces 3 are tightly installed on the stator mounting ring 21 and are circularly distributed.
[0062] In actual implementation, the connection method between the substrate 31 of the conductive elastic piece 3 and the stator mounting ring 21 can be bolt connection or welding, etc., and welding is preferred.
[0063] The present utility model also provides a current collecting device for wind power generation. The current collecting device includes:
[0064] A stator mechanism 20, including the stator mechanism 20;
[0065] A rotor mechanism 10, the rotor mechanism 10 includes several rotor layers, each rotor layer includes several rotor rings and several rotor terminal rows 11, and each rotor layer is provided with a contact surface;
[0066] Conductive elastic pieces 3, the conductive elastic pieces 3 are located between the rotor layer and the stator layer;
[0067] Wherein, a rotor layer and a stator layer are respectively in rotational abutment with the conductive elastic piece 3 to electrically conduct the conductive surface and the contact surface.
[0068] Please refer to Figure 1 , for the current collecting device of the present utility model, the stator mechanism 20 includes a stator layer, and the rotor mechanism 10 includes a rotor layer. Each stator layer and rotor layer adopts a combined structure, which ensures the fixing and supporting functions while reducing the production cost; at the same time, when wear and other problems occur and need to be repaired, it can be quickly disassembled, replaced and repaired. The conductive elastic piece 3 connects the stator mechanism 20 and the rotor mechanism 10. While ensuring smooth connection, it can smoothly realize the passage of large current between the rotor and the stator, saving installation space while achieving a larger current carrying capacity.
[0069] In actual implementation, the sizes of the stator layer and the rotor layer are selected according to actual usage conditions and are not specifically limited herein.
[0070] In an embodiment, the rotor ring includes a rotor fixing ring 12 and a rotor contact ring 13, and the rotor fixing ring 12 is fixedly connected to the upper surface of the rotor contact ring 13.
[0071] Please refer to Figure 1 , in this embodiment, the rotor ring adopts a combined structure, which ensures the fixing and supporting functions while reducing the production cost; at the same time, when wear and other problems occur and need to be repaired, it can be quickly disassembled, replaced and repaired.
[0072] In actual implementation, the rotor fixing ring 22 and the rotor contact ring 13 are of the same size but different materials.
[0073] In one embodiment, the rotor layer includes a plurality of rotor terminal rows 11, a rotor fixing ring 12, and a rotor contact ring 13. A plurality of through holes are formed in the rotor fixing ring 12, and the plurality of rotor terminal rows 11 pass through the through holes and are fixedly connected to the rotor contact ring 13.
[0074] Please refer to Figure 1 , in this embodiment, the rotor layer adopts a combined structure. The rotor fixing ring 12 is a circular ring with a plurality of through holes, realizing the support and fixation of the rotor mechanism 10. The rotor contact ring 13 is a complete circular ring with a smooth lower surface, ensuring stable contact during the conduction process. This combined structure can significantly reduce the material usage and lower the production cost. At the same time, when wear and other problems occur and maintenance is required, it can be quickly disassembled, replaced, and repaired.
[0075] In actual implementation, the material of the rotor ring is not specifically limited. Preferably, the material of the rotor fixing ring 12 is aluminum or stainless steel, and the material of the rotor contact ring 13 is copper.
[0076] In one embodiment, a plurality of rotor layers are arranged at concentric circle intervals, and a gap is formed between two adjacent rotor layers.
[0077] Please refer to Figure 1 , in this embodiment, the concentric circle arrangement of the rotor layers not only simplifies the structure of the rotor mechanism 10 but also can effectively utilize the space of the overall structure, enabling as many rotor mechanisms 10 as possible to be arranged within a limited space, improving the conduction efficiency, and enhancing the heat dissipation effect and heat dissipation capacity.
[0078] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.
Claims
1. A conductive spring for conductive connection, characterized in that: The conductive spring sheet includes a substrate, a first elastic arm, a second elastic arm, a first bent portion and a second bent portion. The upper half of one side of the substrate extends outward and upward to form the first elastic arm, and the free end of the first elastic arm extends and bends to form the first bent portion. The lower half of the other side of the substrate extends outward and upward to form the second elastic arm, and the free end of the second elastic arm extends and bends to form the second bent portion.
2. The conductive spring sheet according to claim 1, wherein: The base plate is provided with a fixing hole.
3. A stator mechanism, characterized in that: The stator structure includes a plurality of stator layers, each of the stator layers includes a plurality of stator rings, a plurality of stator terminal rows and a plurality of conductive springs as claimed in claim 1, the conductive springs are fixedly mounted on the stator rings, and each of the stator layers is provided with a conductive surface.
4. The stator mechanism according to claim 3, characterized in that: The stator ring comprises a stator mounting ring and a stator fixing ring, the conductive spring is fixedly mounted on the stator mounting ring, and the stator fixing ring is fixedly connected to the stator mounting ring.
5. The stator mechanism according to claim 4, characterized in that: The stator fixing ring is provided with a plurality of through holes, and a plurality of stator terminal rows pass through the through holes and are fixedly connected with the stator mounting ring.
6. The stator mechanism according to claim 3, characterized in that: The plurality of stator layers are arranged in concentric circles at intervals, and a gap is formed between two adjacent stator layers.
7. The stator mechanism according to claim 4, characterized in that: A plurality of the conductive spring sheets are mounted on the stator mounting ring, the substrate is mounted on the stator mounting ring, and the substrates of the plurality of the conductive spring sheets are arranged in contact along a tangent direction of the outer circumference of the stator mounting ring.
8. A current collecting device for wind power generation, characterized in that: The current collecting device comprises: A stator mechanism, comprising the stator mechanism as claimed in claim 4; A rotor mechanism, the rotor mechanism comprising a plurality of rotor layers, each of the rotor layers comprising a plurality of rotor rings and a plurality of rotor terminal rows, each of the rotor layers being provided with an electric contact surface; A conductive spring sheet, wherein the conductive spring sheet is located between the rotor layer and the stator layer; Wherein, a rotor layer and a stator layer are respectively rotatably abutted against the conductive spring sheet to electrically connect the conductive surface and the contact surface.
9. The current collector according to claim 8, characterized in that The rotor ring comprises a rotor fixing ring and a rotor contact ring, and the rotor contact ring is fixedly connected to the rotor fixing ring.
10. The current collector according to claim 9, characterized in that The rotor layer includes a plurality of rotor terminal rows, a rotor fixing ring and a rotor contact ring. The rotor fixing ring is provided with a plurality of through holes, and the plurality of rotor terminal rows pass through the through holes and are fixedly connected to the rotor contact ring.
11. The current collector according to claim 8, wherein: The plurality of rotor layers are arranged in concentric circles at intervals, and a gap is formed between two adjacent rotor layers.