Friction electricity-variable reluctance hybrid power generation device of bearing structure and power generation system

Abstract

The invention discloses a triboelectricity-variable reluctance hybrid power generation device and system of a bearing structure, the triboelectricity-variable reluctance hybrid power generation device of the bearing structure comprises a support frame, a rotating shaft, a rolling shaft, a friction power generation assembly and a variable reluctance power generation assembly, the friction power generation assembly comprises a dielectric ring and an interdigital electrode plate, the dielectric ring is annularly arranged on a retainer of the rotating shaft, the interdigital electrode plate surrounds the periphery of the rotating shaft and is connected with the supporting frame, the dielectric ring and the interdigital electrode plate are adjacent and opposite, the variable reluctance power generation assembly comprises a magnet coil and a gear-shaped nut, the gear-shaped nut is arranged on the rotating shaft in a sleeving mode, and convex teeth are arranged on the peripheral surface of the gear-shaped nut; the multiple magnet coils are arranged in the circumferential direction of the supporting frame at intervals, and the multiple magnet coils surround the periphery of the gear-shaped nut. According to the friction electricity-variable reluctance hybrid power generation device of the bearing structure, in-situ self-sensing of the running state of the bearing can be achieved, the structure is compact, and external power supply equipment and related wiring do not need to be arranged.

Description

Technical Field

[0001] The present invention relates to the technical field of friction power generation equipment, and in particular to a friction electric-variable reluctance hybrid power generation device and a power generation system of a bearing structure. Background Art

[0002] As a core component of rotating machinery, bearings play a crucial role in supporting rotating elements, reducing frictional resistance, and transmitting mechanical loads. Due to long-term high-speed rotation, heavy loads, and complex operating conditions, bearings are susceptible to mechanical damage such as cage slippage, raceway wear, and rolling element spalling. These failures account for approximately 30% of all rotating machinery failures. Failure to promptly detect and address these failures can lead to equipment failure or even major safety accidents. Therefore, timely detection of abnormal bearing operating conditions, accurate diagnosis of early-stage failures, and effective downtime maintenance can significantly ensure the safety of rotating machinery.

[0003] Current bearing condition monitoring technologies primarily rely on externally mounted contact sensors, such as vibration sensors, temperature sensors, and acoustic emission sensors, or internal current sensors, such as eddy current sensors. However, these traditional contact sensors require additional installation space and rely on external power supplies, severely limiting their operation in highly integrated equipment such as aircraft engines and gas turbines. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that, in response to the defects and shortcomings of the existing technology, a friction electric-variable reluctance hybrid power generation device with a bearing structure is proposed. The friction electric-variable reluctance hybrid power generation device with a bearing structure can realize in-situ self-sensing of the bearing operating status, and at the same time cooperate with the high power output characteristics of the variable reluctance power generation module to drive the wireless signal transmission module to complete the real-time remote transmission of the sensing data, thereby constructing a bearing operating status monitoring system with compact structure, self-drive, and wireless intelligent sensing characteristics, which effectively solves the technical bottlenecks of traditional sensing solutions in terms of space occupancy, wiring complexity and energy supply dependence.

[0005] The friction electric-variable reluctance hybrid power generation device of the bearing structure of the embodiment of the present invention includes: a support frame, a rotating shaft and a rolling bearing, the rotating shaft is inserted into the support frame, and the rolling bearing is arranged between the rotating shaft and the support frame; a friction power generation component, the friction power generation component includes a dielectric ring and an interdigitated electrode plate, the dielectric ring is arranged on the retaining frame of the rotating shaft, the interdigitated electrode plate surrounds the outer circumference of the rotating shaft and is connected to the support frame, the dielectric ring and the interdigitated electrode plate are adjacent to and opposite to each other; a variable reluctance power generation component, the variable reluctance power generation component includes a magnet coil and a gear-shaped nut, the gear-shaped nut is sleeved on the rotating shaft and has convex teeth arranged at intervals along the circumference of the gear-shaped nut on its outer circumferential surface, the magnet coil is a plurality of magnet coils arranged at intervals along the circumference of the support frame, and the plurality of magnet coils surround the outer circumference of the gear-shaped nut and leave a gap with the gear-shaped nut in the radial direction of the rotating shaft.

[0006] The triboelectric-variable reluctance hybrid power generation device of the bearing structure of the embodiment of the present invention comprises a triboelectric power generation component including a dielectric ring and an interdigital electrode plate. The dielectric ring is mounted on a retaining frame of the rotating shaft. The interdigital electrode plate surrounds the outer circumference of the rotating shaft and is connected to a support frame. The dielectric ring and the interdigital electrode plate are adjacent to and opposite to each other. The variable reluctance power generation component includes a magnetic coil and a gear-shaped nut. The gear-shaped nut is mounted on the rotating shaft and has convex teeth arranged at intervals along the circumference of the gear-shaped nut on its outer circumference. The magnetic coils are arranged at intervals along the circumference of the support frame. The multiple magnetic coils surround the outer circumference of the gear-shaped nut and leave a gap with the gear-shaped nut in the radial direction of the rotating shaft. Therefore, during the operation of the rotating shaft, the triboelectric power generation component can generate an AC signal for analyzing the operating status of the bearing. At the same time, the high power output characteristics of the variable reluctance power generation component are used to drive a wireless signal transmission device to complete the real-time remote transmission of sensing data, thereby constructing a bearing operating status monitoring system with a compact structure, self-driving, and wireless intelligent sensing features, effectively solving the technical bottlenecks of traditional sensing solutions in terms of space occupation, wiring complexity, and energy supply dependence.

[0007] In some embodiments, the inner ring of the rolling bearing is connected to the rotating shaft via a locking nut; or, the inner ring of the rolling bearing is connected to the rotating shaft via the gear-shaped nut.

[0008] In some embodiments, the support frame includes a cage and a cover plate, wherein the cover plate is connected to one end of the cage and the interdigitated electrode plate is provided on a side of the cover plate opposite to the dielectric ring.

[0009] In some embodiments, a protruding assembly ring plate is provided on the side of the cover plate opposite to the dielectric ring, the assembly ring plate is in contact with the inner circumference of the squirrel cage, and the interdigitated electrode plate surrounds the outer circumference of the assembly ring plate.

[0010] In some embodiments, the cover plate has an inner ring hole, the locking nut is located in the inner ring hole, and the hole wall of the inner ring hole is provided with a plurality of mounting holes arranged at intervals along its circumference, and each mounting hole is provided with a magnet coil.

[0011] In some embodiments, the axis of the locking nut is collinear with the axis of the inner annular hole.

[0012] In some embodiments, a distance h between the dielectric ring and the interdigitated electrode plate satisfies 0.5 mm ≤ h ≤ 2 mm.

[0013] In some embodiments, the rolling bearing is an angular contact bearing.

[0014] The friction electric-variable reluctance hybrid power generation system of the bearing structure of the present invention includes an electrical signal analysis device and the friction electric-variable reluctance hybrid power generation device of the bearing structure described in the above embodiment, and the electrical signal analysis device is used to receive the electrical signal generated by the friction power generation component.

[0015] The friction electric-variable reluctance hybrid power generation system of the bearing structure of the embodiment of the present invention adopts the above-mentioned electrical signal analysis equipment and the friction electric-variable reluctance hybrid power generation device of the bearing structure of the above-mentioned embodiment. The electrical signal analysis equipment can generate friction electricity by analyzing the friction / induction electrification effect between the dielectric ring and the electrode plate, thereby realizing in-situ self-sensing of the bearing operating status. At the same time, the high power output characteristics of the variable reluctance power generation module are coordinated to drive the wireless signal transmission module to complete the real-time remote transmission of the sensing data, thereby constructing a bearing operating status monitoring system with compact structure, self-drive, and wireless intelligent sensing characteristics, which effectively solves the technical bottlenecks of traditional sensing solutions in terms of space occupancy, wiring complexity, and energy supply dependence.

[0016] In some embodiments, the friction electric-variable reluctance hybrid power generation system of the bearing structure also includes a wireless signal transmitting device, and the variable reluctance power generation component is used to supply power toward the wireless signal transmitting device and / or the electrical signal analysis device, and the wireless signal transmitting device is used to transmit the current generated by the friction electric power generation component to the electrical signal analysis device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 1 is an exploded view of a friction electric-variable reluctance hybrid power generation device with a bearing structure according to an embodiment of the present invention.

[0018] Figure 2 2 is a schematic structural diagram of a frictional electric-variable reluctance hybrid power generation device with a bearing structure according to an embodiment of the present invention.

[0019] Figure 3This is a diagram showing the relationship between the voltage output and the rotational speed of the triboelectric component of the triboelectric-variable reluctance hybrid power generation device having a bearing structure according to an embodiment of the present invention.

[0020] Figure 4 This is a relationship diagram between the current output and the rotational speed of the variable reluctance component of the friction electric-variable reluctance hybrid power generation device of the bearing structure of an embodiment of the present invention.

[0021] Reference numerals:

[0022] Squirrel cage 1, rolling bearing 2, retaining frame 3, dielectric ring 4, interdigital electrode plate 5, gear-shaped nut 6, cover plate 7, mounting hole 8, magnet coil 9, rotating shaft 10. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0024] like Figure 1 and Figure 2 As shown, the frictional electric-variable reluctance hybrid power generation device of the bearing structure of the embodiment of the present invention includes a support frame, a rotating shaft 10, a rolling bearing 2, a frictional electric power generation component and a variable reluctance electric power generation component.

[0025] Specifically, if Figure 1 As shown, the rotating shaft 10 is passed through the support frame, and the rolling bearing 2 is arranged between the rotating shaft 10 and the support frame. The friction power generation component includes a dielectric ring 4 and a forked electrode plate 5. The dielectric ring 4 is arranged on the retaining frame 3 of the rotating shaft 10. The forked electrode plate 5 surrounds the outer periphery of the rotating shaft 10 and is connected to the support frame. The dielectric ring 4 and the forked electrode plate 5 are adjacent to and opposite to each other. The variable reluctance power generation component includes a magnetic coil 9 and a gear-shaped nut 6. The gear-shaped nut 6 is sleeved on the rotating shaft 10 and has convex teeth arranged at intervals along the circumference of the gear-shaped nut 6 on its outer peripheral surface. There are multiple magnetic coils 9 arranged at intervals along the circumference of the support frame, and multiple magnetic coils 9 surround the outer periphery of the gear-shaped nut 6 and leave a gap with the gear-shaped nut 6 in the radial direction of the rotating shaft 10.

[0026] During the operation of the rolling bearing 2, the dielectric ring 4 mounted on the cage 3 rotates with the cage 3, and moves relative to the corresponding interdigital electrode plate 5. Charges are induced between different electrode partitions on the interdigital electrode plate 5, resulting in a potential difference and generating an AC signal. This AC signal can be output to an external electrical signal analysis device via a wire or wireless signal transmission device. Since the frequency and peak value of the current signal are proportional to the rotational speed (such as Figure 3By analyzing the AC signal generated by the triboelectric component, the bearing's operating status can be sensed in situ. Furthermore, the parameters of the electrical signal can be altered by the number of protrusions designed on the interdigitated electrode plates 5 and the dielectric ring 4, as well as the material and load of the dielectric ring 4.

[0027] Furthermore, when the gear-shaped nut 6 rotates with the shaft 10, the external protrusions will sequentially sweep the magnetic coil 9, causing it to generate an induced current in the coil. This induced current can be used as a power supply to external devices, such as wireless signal transmitters, thereby eliminating the need for external power supply equipment and related wire layouts in the bearing operation status monitoring and detection system. It should be noted that the frequency and peak value of the current signal are directly proportional to the speed (e.g. Figure 4 As shown), the parameters of the electrical signal can be changed by the number of teeth of the gear-shaped nut 6, the diameter of the winding wire used to make the coil, and the number of installed magnet coils 9.

[0028] The frictional electric-variable reluctance hybrid power generation device of the bearing structure of the embodiment of the present invention, the frictional electric power generation component includes a dielectric ring 4 and an interdigital electrode plate 5, the dielectric ring 4 is arranged on the retaining frame 3 of the rotating shaft 10, the interdigital electrode plate 5 surrounds the outer periphery of the rotating shaft 10 and is connected to the support frame, the dielectric ring 4 and the interdigital electrode plate 5 are adjacent to and opposite to each other, the variable reluctance electric power generation component includes a magnetic coil 9 and a gear-shaped nut 6, the gear-shaped nut 6 is sleeved on the rotating shaft 10 and has convex teeth arranged at intervals along the circumference of the gear-shaped nut 6 on its outer peripheral surface, the magnetic coil 9 is a plurality of magnetic coils arranged at intervals along the circumference of the support frame, and the plurality of magnetic coils are arranged at intervals along the circumference of the support frame. The iron coil 9 is wrapped around the outer circumference of the gear-shaped nut 6 and leaves a gap with the gear-shaped nut 6 in the radial direction of the rotating shaft 10. Therefore, during the operation of the rotating shaft 10, the friction power generation component can generate an AC signal for analyzing the operating status of the bearing. At the same time, the high power output characteristics of the variable reluctance power generation component are coordinated to drive the wireless signal transmission equipment to complete the real-time remote transmission of the sensing data, thereby constructing a bearing operating status monitoring system with compact structure, self-drive, and wireless intelligent sensing characteristics, which effectively solves the technical bottlenecks of traditional sensing solutions in terms of space occupancy, wiring complexity and energy supply dependence.

[0029] Furthermore, the inner ring of the rolling bearing 2 is connected to the rotating shaft 10 via a locking nut; or, the inner ring of the rolling bearing 2 is connected to the rotating shaft 10 via a gear-shaped nut 6 .

[0030] In other words, one embodiment of the present application is that the locking nut and the gear-shaped nut 6 are two independent structural components, the locking nut is used to lock the inner ring of the rolling bearing 2, and the gear-shaped nut 6 is used to form a variable reluctance power generation component.

[0031] The present application also has a preferred embodiment in which a convex tooth structure is directly provided on the locking nut, and the local features of the locking nut are changed so that it has the functionality of both the locking nut and the gear-shaped nut 6. That is, there is no need to provide a separate gear-shaped nut 6, and only the existing locking nut needs to be modified, which is beneficial to reducing the number of structural components and optimizing the spatial layout of the equipment.

[0032] Furthermore, if Figure 1 As shown, the support frame includes a cage 1 and a cover plate 7. The cover plate 7 is connected to one end of the cage 1 and has an interdigitated electrode plate 5 on the side opposite the dielectric ring 4. Thus, the support frame is composed of another detachable structural component, facilitating the assembly of the triboelectric generator and subsequent maintenance and replacement.

[0033] Preferably, a protruding mounting ring is provided on the side of the cover plate 7 opposite the dielectric ring 4. This mounting ring fits against the inner circumference of the cage 1, and the interdigitated electrode plates 5 surround the outer circumference of the mounting ring. This allows the mounting ring to be inserted into the cage 1, improving the reliability of the connection between the cover plate 7 and the cage 1. Furthermore, the mounting ring serves as an assembly guide and, once inserted, limits the position of the rolling bearing 2, preventing axial movement of the rolling bearing 2.

[0034] Furthermore, if Figure 1 As shown, the cover plate 7 has an inner annular hole, within which the locking nut is located. The inner annular hole wall is provided with a plurality of mounting holes 8 spaced apart along its circumference, each of which houses a magnet coil 9. Thus, the magnet coil 9 is housed within the cover plate 7 without occupying additional installation space, and the mounting holes 8 serve as a positioning limit for the magnet coil 9.

[0035] Preferably, the axis of the locking nut is collinear with the axis of the inner ring hole, that is, the locking nut and the cover plate 7 are installed concentrically.

[0036] In some embodiments, the distance h between the dielectric ring 4 and the interdigitated electrode plate 5 satisfies 0.5 mm ≤ h ≤ 2 mm. For example, h can be 0.5 mm, 1 mm, 1.5 mm, or 2 mm. It should be noted that the inventors have experimentally found that when the distance between the dielectric ring 4 and the interdigitated electrode plate 5 is within the above range, the triboelectric generator assembly can stably output an AC signal, which is beneficial for improving the accuracy of the feedback result, and the dielectric ring 4 and the interdigitated electrode plate 5 do not interfere with each other during assembly.

[0037] Preferably, the rolling bearing 2 is an angular contact bearing.

[0038] The friction electric-variable reluctance hybrid power generation system of the bearing structure of an embodiment of the present invention includes an electrical signal analysis device and a friction electric-variable reluctance hybrid power generation device of the bearing structure of the above embodiment, and the electrical signal analysis device is used to receive the electrical signal generated by the friction power generation component.

[0039] The friction electric-variable reluctance hybrid power generation system of the bearing structure of the embodiment of the present invention adopts the above-mentioned electrical signal analysis equipment and the friction electric-variable reluctance hybrid power generation device of the bearing structure of the above-mentioned embodiment. The electrical signal analysis equipment can generate friction electricity by analyzing the friction / induction electrification effect between the dielectric ring 4 and the electrode plate, thereby realizing in-situ self-sensing of the bearing operating status. At the same time, the high power output characteristics of the variable reluctance power generation module are coordinated to drive the wireless signal transmission module to complete the real-time remote transmission of the sensing data, thereby constructing a bearing operating status monitoring system with compact structure, self-drive, and wireless intelligent sensing characteristics, which effectively solves the technical bottlenecks of traditional sensing solutions in terms of space occupancy, wiring complexity, and energy supply dependence.

[0040] Furthermore, the bearing structure's triboelectric-variable reluctance hybrid power generation system also includes a wireless signal transmitter. The variable reluctance generator assembly is used to supply energy to the wireless signal transmitter and / or the electrical signal analysis device. The wireless signal transmitter is used to transmit the current generated by the triboelectric generator assembly to the electrical signal analysis device. Thus, the wireless signal transmitter assembly can transmit the AC signal generated by the triboelectric generator assembly over long distances, overcoming the spatial limitations of wired transmission. Furthermore, the variable reluctance generator assembly can provide power for both the wireless signal transmitter and the electrical signal analysis device, achieving internal power supply.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0043] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0044] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0045] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0046] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A friction electric-variable reluctance hybrid power generation device with a bearing structure, characterized in that: include: A support frame, a rotating shaft and a rolling bearing, wherein the rotating shaft is arranged inside the support frame, and the rolling bearing is arranged between the rotating shaft and the support frame; a triboelectric power generation assembly comprising a dielectric ring and an interdigitated electrode plate, wherein the dielectric ring is mounted on a retaining frame of the rotating shaft, the interdigitated electrode plate surrounds the outer circumference of the rotating shaft and is connected to the support frame, and the dielectric ring and the interdigitated electrode plate are adjacent to and opposite to each other; A variable reluctance power generation component, the variable reluctance power generation component includes a magnet coil and a gear-shaped nut, the gear-shaped nut is sleeved on the rotating shaft and has convex teeth arranged at intervals along the circumference of the gear-shaped nut on its outer circumferential surface, the magnet coil is arranged at intervals along the circumference of the support frame in plurality, and the plurality of magnet coils surround the outer circumference of the gear-shaped nut and leave a gap with the gear-shaped nut in the radial direction of the rotating shaft.

2. The frictional electric-variable reluctance hybrid power generation device of the bearing structure according to claim 1, characterized in that: The inner ring of the rolling bearing is connected to the rotating shaft via a locking nut; or, the inner ring of the rolling bearing is connected to the rotating shaft via the gear-shaped nut.

3. The frictional electric-variable reluctance hybrid power generation device of the bearing structure according to claim 2, characterized in that: The support frame includes a squirrel cage and a cover plate. The cover plate is connected to one end of the squirrel cage and the interdigital electrode plate is provided on the side of the cover plate opposite to the dielectric ring.

4. The frictional electric-variable reluctance hybrid power generation device of the bearing structure according to claim 4 is characterized in that: A protruding assembly ring plate is provided on the side of the cover plate opposite to the dielectric ring. The assembly ring plate is in contact with the inner circumference of the squirrel cage, and the interdigitated electrode plate surrounds the outer circumference of the assembly ring plate.

5. The frictional electric-variable reluctance hybrid power generation device of the bearing structure according to claim 4, characterized in that: The cover plate has an inner ring hole, the locking nut is located in the inner ring hole, and a plurality of mounting holes arranged at intervals along the circumference of the inner ring hole are provided on the hole wall of the inner ring hole, and each mounting hole is provided with a magnet coil.

6. The frictional electric-variable reluctance hybrid power generation device of the bearing structure according to claim 6, characterized in that: The axis of the locking nut is collinear with the axis of the inner annular hole.

7. The triboelectric-variable reluctance hybrid power generation device of the bearing structure according to claim 1, characterized in that: A distance h between the dielectric ring and the interdigitated electrode plate satisfies 0.5 mm ≤ h ≤ 2 mm.

8. The frictional electric-variable reluctance hybrid power generation device of the bearing structure according to claim 1, characterized in that: The rolling bearing is an angular contact bearing.

9. A friction electric-variable reluctance hybrid power generation system with a bearing structure, characterized in that: It comprises an electrical signal analysis device and a friction electric-variable reluctance hybrid power generation device according to the bearing structure of any one of claims 1 to 8, wherein the electrical signal analysis device is used to receive the electrical signal generated by the friction power generation component.

10. The frictional electric-variable reluctance hybrid power generation system of the bearing structure according to claim 9, characterized in that: It also includes a wireless signal transmitting device, the variable reluctance power generation component is used to supply power to the wireless signal transmitting device and / or the electrical signal analysis device, and the wireless signal transmitting device is used to transmit the current generated by the friction power generation component to the electrical signal analysis device.

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