Built-in variable reluctance power generation part for railway axle box bearing

Abstract

The invention discloses a variable reluctance power generation system based on a railway axle box bearing, the variable reluctance power generation system based on the railway axle box bearing comprises a bearing and a power generation device, the bearing comprises an outer ring, a first rolling unit, a second rolling unit and a metal ring, the first rolling body, the metal ring and the second rolling body are sequentially arranged in the outer ring and can rotate around the axial direction of the outer ring relative to the outer ring, a matching part is arranged on the peripheral face of the metal ring, the power generation device comprises an installation part and a power generation part, and the installation part is detachably arranged in the outer ring and connected with the outer ring. The metal ring is sleeved with the installation part, the installation part and the metal ring are oppositely arranged at intervals in the radial direction of the bearing, the power generation part is arranged on the installation part and oppositely arranged at intervals in the radial direction of the bearing, and the power generation part can generate a magnetic field and is matched with the matching part. The variable reluctance power generation system based on the railway axle box bearing has the advantages of being simple in structure, high in electromechanical conversion efficiency and the like.

Description

Technical Field

[0001] The present invention relates to a variable reluctance power generation system based on a railway axle box bearing. The system takes a railway axle box bearing as the main structure and can output the electric charge generated by the variable reluctance effect between the variable reluctance power generation component and the toothed metal ring during the rotation of the bearing as an electric signal, featuring simple structure and stable electric signal. Background Art

[0002] Railway transportation, as an important part of the modern transportation system, undertakes a large number of passenger and freight tasks. As a core component of the train running gear, the railway axle box bearing undertakes the important functions of supporting the weight of the car body, transmitting power and ensuring the smooth operation of the train. Due to the long-term operation of the railway axle box bearing under high speed, heavy load and complex working conditions, it is extremely prone to failures such as wear, fatigue and overheating, and may even lead to major accidents such as train derailment in severe cases. Therefore, real-time monitoring of the operating state of the railway axle box bearing is of great significance for ensuring the safe operation of the train and reducing maintenance costs.

[0003] In related technologies, the railway axle box bearing monitoring system usually relies on external power supply, suffering from problems such as complex wiring, high maintenance cost and lack of flexibility. In addition, the working environment where the railway axle box bearing is located usually has extremely high temperature, dynamic load, corrosiveness and enclosure, making it difficult to access external power supply. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems in the related technologies to some extent.

[0005] To this end, an embodiment of the present invention provides a variable reluctance power generation system based on a railway axle box bearing, which has the advantages of simple structure, low maintenance cost and high flexibility.

[0006] The variable reluctance power generation system based on a railway axle box bearing according to an embodiment of the present invention includes: a bearing, the bearing including an outer ring, a first rolling unit, a second rolling unit and a metal ring, the first rolling unit, the metal ring and the second rolling unit being sequentially arranged inside the outer ring and all being rotatable relative to the outer ring along the axial direction of the outer ring, and a mating portion being provided on the outer peripheral surface of the metal ring; a power generation device, the power generation device including a mounting member and a power generation member, the mounting member being detachably arranged inside the outer ring and connected to the outer ring, the mounting member being sleeved outside the metal ring and being arranged at a radial interval relative to the metal ring, and the power generation member being arranged on the mounting member and being arranged at a radial interval relative to the mating portion, the power generation member being capable of generating a magnetic field and cooperating with the mating portion so that when the metal ring drives the mating portion to rotate, the mating portion drives the power generation member to generate a variable reluctance effect to generate an induced current.

[0007] The variable reluctance power generation system based on a railway axle box bearing according to an embodiment of the present invention is provided with a bearing and a power generation component. When the bearing rotates at a high speed, charges generated by the power generation element can be output as a stable electrical signal, without relying on an external power supply, solving problems such as complex wiring, high maintenance costs, and insufficient flexibility.

[0008] In some embodiments, the number of the engaging portions is multiple, and the multiple engaging portions are arranged at intervals along the circumferential direction of the metal ring. The number of the power generation elements is multiple, and the multiple power generation elements are arranged at intervals along the circumferential direction of the mounting member. The multiple power generation elements and the multiple engaging portions are arranged in one-to-one correspondence along the axial direction of the outer ring.

[0009] In some embodiments, the multiple power generation elements are connected in series in sequence to form a power generation component, and the power generation component is used to be connected to an external device.

[0010] In some embodiments, the number of the multiple engaging portions is arranged at equal intervals along the circumferential direction of the metal ring, and the multiple power generation elements are arranged at equal intervals along the circumferential direction of the mounting member.

[0011] In some embodiments, through holes penetrating the outer ring along the radial direction of the bearing are provided on the outer ring, so that a fastening member can be connected to the mounting member through the through holes.

[0012] In some embodiments, the number of the through holes is multiple, and the multiple through holes are arranged at intervals along the circumferential direction of the outer ring. One part of the multiple through holes is used to install the fastening member, and the other part of the multiple through holes is used to install wires, so that the power generation element can be connected to an external device through the wires.

[0013] In some embodiments, mounting holes penetrating the mounting member along the axial direction of the mounting member are provided on the mounting member. A mounting shaft is provided on the power generation element, and the mounting shaft is inserted into the mounting hole and connected to the fastening member, so that the power generation element is mounted on the mounting member.

[0014] In some embodiments, the bearing is a double-row tapered roller bearing, the mounting member is a nylon ring, and the power generation element is a variable reluctance generator.

[0015] In some embodiments, one side of the power generation element facing the engaging portion is a first surface, and one side of the engaging portion facing the power generation element is a second surface. The first surface and the second surface are parallel, and the distance between the first surface and the second surface is not less than 1 mm. Description of the Drawings

[0016] Figure 1 is the front view of the variable reluctance power generation system based on a railway axle box bearing according to an embodiment of the present invention.

[0017] Figure 2It is a cross-sectional view of the variable reluctance power generation system based on a railway axle box bearing according to an embodiment of the present invention.

[0018] Figure 3 It is an exploded view of the variable reluctance power generation system based on a railway axle box bearing according to an embodiment of the present invention.

[0019] Figure 4 It is an assembly drawing of the power generation device and the metal ring of the variable reluctance power generation system based on a railway axle box bearing according to an embodiment of the present invention.

[0020] Figure 5 It is a schematic structural diagram of the metal ring of the variable reluctance power generation system based on a railway axle box bearing according to an embodiment of the present invention.

[0021] Figure 6 It is a schematic structural diagram of the power generation component of the variable reluctance power generation system based on a railway axle box bearing according to an embodiment of the present invention.

[0022] 100. Variable reluctance power generation system based on railway axle box bearing power generation device;

[0023] 1. Bearing; 11. Outer ring; 12. First rolling unit; 13. Second rolling unit; 14. Metal ring; 15. Fitting portion; 16. Through hole;

[0024] 2. Power generation device; 21. Mounting member; 22. Power generation component; 23. Mounting shaft; 3. Fastener. Detailed implementation manners

[0025] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0026] The variable reluctance power generation system 100 based on a railway axle box bearing according to an embodiment of the present invention will be described below with reference to the drawings.

[0027] As Figure 1-6 shown, the variable reluctance power generation system 100 based on a railway axle box bearing according to an embodiment of the present invention includes a bearing 1 and a power generation device 2.

[0028] The bearing 1 includes an outer ring 11, a first rolling unit 12, a second rolling unit 13, and a metal ring 14. The first rolling unit 12, the metal ring 14, and the second rolling unit 13 are sequentially arranged inside the outer ring 11 and are all rotatable relative to the outer ring 11 about the axial direction of the outer ring 11 (such as Figure 3 the up and down direction shown), and a fitting portion 15 is provided on the outer peripheral surface of the metal ring 14. Specifically, as Figure 1-Figure 4As shown, the bearing 1 is a double-row tapered roller bearing. The first rolling element unit 12, the metal ring 14, and the second rolling element unit 13 are all arranged inside the outer ring 11 and arranged in sequence along the left-right direction. The first rolling element unit 12 includes a first cage, first rolling elements, and a first inner ring. The first inner ring is arranged inside the outer ring 11 and is spaced from the outer ring 11. The first cage is sleeved on the first inner ring and is located between the first inner ring and the outer ring 11. The first rolling elements are arranged inside the first cage. The second rolling element unit 13 includes a second cage, second rolling elements, and a second inner ring. The second inner ring is arranged inside the outer ring 11 and is spaced from the outer ring 11. The second cage is sleeved on the second inner ring and is located between the second inner ring and the outer ring 11. The second rolling elements are arranged inside the second cage. The metal ring 14 is located between the first cage and the second cage, and the first cage and the second cage respectively abut against the left and right sides of the metal ring 14. Both the first inner ring and the second inner ring can be sleeved on the rotating shaft, and the outer ring 11 is arranged inside the bearing 1 housing, so that the rotating shaft drives the first inner ring and the second inner ring to rotate synchronously, and the first cage and the second cage drive the metal ring 14 to rotate.

[0029] The power generation device 2 includes a mounting member 21 and a power generation member 22. The mounting member 21 is detachably arranged inside the outer ring 11 and is connected to the outer ring 11. The mounting member 21 is sleeved outside the metal ring 14 and is arranged opposite to the metal ring 14 at an interval along the radial direction of the bearing 1 (such as Figure 1 the inner-outer direction shown). The power generation member 22 is arranged on the mounting member 21 and is arranged opposite to the mating portion 15 at an interval along the radial direction of the bearing 1. The power generation member 22 can generate a magnetic field and cooperate with the mating portion 15, so that when the metal ring 14 drives the mating portion 15 to rotate, the mating portion 15 drives the power generation member 22 to generate a variable reluctance effect to generate an induced current. Specifically, as Figure 1-Figure 5 shown, the mounting member 21 is annular and is arranged inside the outer ring 11. The mounting member 21 is located between the first rolling element unit 12 and the second rolling element unit 13. The inner ring of the mounting member 21 and the outer ring of the metal ring 14 are arranged opposite to each other at an interval along the inner-outer direction. The power generation member 22 is a generator and is arranged between the metal ring 14 and the mounting member 21. The outer ring of the metal ring 14 is provided with a mating portion 15. The power generation member 22 is fixedly installed on the mounting member 21 and is arranged opposite to the mating portion 15 at an interval along the inner-outer direction. As the bearing 1 rotates, the mating portion 15 rotates periodically, causing the power generation member 22 to generate a magnetic field to produce a variable reluctance effect and then generate an induced current, realizing the conversion of mechanical energy into electrical energy.

[0030] For the variable reluctance power generation system 100 based on a railway axle box bearing in the embodiment of the present invention, the bearing 1 and the power generation device 2 are provided. By using the charges generated by the variable reluctance effect due to the gap between the mating portion 15 and the power generation member 22 when the bearing 1 rotates, the mechanical energy is converted into electrical energy, and a stable electrical signal is output. It has the advantages of simple structure, stable electrical signal, strong anti-interference ability, etc.

[0031] In some embodiments, the power generating member 22 is a variable reluctance generator. Specifically, the power generating member 22 includes a permanent magnet, a coil (with lead wires), a stator, a fixing nut, a wire, and a gasket. The permanent magnet is an N52 neodymium iron boron magnet, which provides a strong magnetic field for the variable reluctance effect. The N52 neodymium iron boron magnet has a high magnetic energy product and strong magnetism, and can generate a stable magnetic field in the magnetic circuit, providing a basis for the variable reluctance effect. The coil induces the generation and output of current. When the coil is in a changing magnetic field and the magnetic flux density changes due to the movement of the mating portion 15, the magnetic flux in the coil will also change accordingly, thereby generating an induced electromotive force, and then generating an induced current, and the electrical energy is output through the lead wire. The stator is made of carbon steel core, which plays a role in enhancing the magnetic permeability of the magnetic circuit and concentrating the magnetic field. The high magnetic permeability of the stator can effectively concentrate and guide the magnetic lines of force, enhancing the efficiency of the magnetic circuit.

[0032] In some embodiments, the number of the mating portions 15 is multiple, and the multiple mating portions 15 are arranged at intervals along the circumferential direction of the metal ring 14. The number of the power generating members 22 is multiple, and the multiple power generating members 22 are arranged at intervals along the circumferential direction of the mounting member 21. The multiple power generating members 22 and the multiple mating portions 15 are arranged in one-to-one correspondence along the axial direction of the outer ring 11. Specifically, as Figure 5 shown, the number of the multiple mating portions 15 is equal to the number of the multiple power generating members 22. The multiple power generating members 22 are arranged at intervals along the circumferential direction of the metal ring 14 on the outer peripheral side of the metal ring 14. The multiple power generating members 22 are arranged on the inner circumferential surface of the mounting member 21 and are arranged at intervals along the inner circumferential surface of the metal ring 14. The multiple power generating members 22 and the multiple mating portions 15 are arranged in one-to-one correspondence in the inner and outer directions. Since the output voltage of the power generating member 22 depends on the magnetic resistance change rate (dΦ / dt), and the magnetic resistance change is closely related to the rotor position of the power generating member 22. When multiple power generating members 22 are connected in series, when the multiple power generating members 22 and the multiple mating portions 15 are not corresponding in the up and down direction (in other words, the phases of the multiple power generating members 22 and the multiple mating portions 15 are inconsistent), when one power generating member 22 is at the voltage peak, another power generating member 22 may be at the trough, resulting in the cancellation of the output voltages of the two power generating members 22 and reducing the total output power. Therefore, when the multiple power generating members 22 and the multiple mating portions 15 are corresponding in the up and down direction (in other words, phase alignment can ensure the superposition of the voltage peaks of each power generating member 22), the overall output voltage and power are increased. In addition, the energy conversion of the power generating member 22 depends on the periodic change of the magnetic resistance of the magnetic circuit. If the phases are disordered, some power generating members 22 will contribute less energy when the magnetic resistance is the largest (dΦ / dt is the smallest), reducing the system efficiency. Synchronous phase can ensure that all power generating members 22 work together at the same rotor position, maximizing energy extraction. Secondly, if the phases are inconsistent, the peaks of the electromagnetic forces (torques) of each power generating member 22 will be staggered, resulting in increased torque fluctuations, which may cause mechanical vibration, noise, and even structural fatigue. Phase alignment can compensate for the torque pulsations with each other, making the system operate more smoothly.

[0033] In some embodiments, the number of the plurality of engaging portions 15 is arranged at equal intervals in the circumferential direction around the metal ring 14, and the plurality of power generation elements 22 are arranged at equal intervals in the circumferential direction around the mounting member 21. Thus, the plurality of engaging portions 15 and the plurality of power generation elements 22 are arranged opposite to each other at intervals in the inner and outer directions, and the equal-interval layout makes the magnetic circuit formed by each power generation element 22 and the engaging portion 15 have symmetry. When the metal ring 14 rotates, all the magnetoresistance change periods are strictly synchronized, avoiding local magnetic field distortion, ensuring the consistency of the output waveforms of each power generation unit, and on the premise of phase alignment, the equal-interval setting enables the output voltage peaks of the power generation elements 22 to be synchronously superimposed, improving the energy conversion efficiency.

[0034] In some embodiments, through holes 16 penetrating the outer ring 11 in the radial direction of the bearing 1 are provided on the outer ring 11 so that the fasteners 3 can be connected to the mounting member 21 through the through holes 16. Specifically, as Figure 1 and Figure 3 shown, through holes 16 penetrating the outer ring 11 in the inner and outer directions are provided on the outer ring 11, and the fasteners 3 are screws or bolts. The fasteners 3 are inserted into the through holes 16 and pass through the mounting member 21. Thus, the mounting member 21 is fixedly mounted on the outer ring 11 through the fasteners 3.

[0035] It should be noted that the power generation element 22 of the variable reluctance power generation system 100 based on the railway axle box bearing can be connected to an external wireless transmission system through a wire, and the electric energy generated by the power generation element 22 is supplied to the wireless transmission system for transmission experiments. The power supply performance can be improved by adjusting the parameters of the power generation element 22 components.

[0036] In some embodiments, the plurality of power generation elements 22 are connected in series in sequence to form a power generation assembly, and the power generation assembly is used to be connected to an external device. Specifically, the plurality of power generation elements 22 are connected in sequence to form a power generation assembly, and the power generation assembly is connected to a detection device, thereby increasing the electrical signal of the power generation device 2 and improving the accuracy of the detection device.

[0037] In some embodiments, there are a plurality of through holes 16, and the plurality of through holes 16 are arranged at intervals in the circumferential direction around the outer ring 11. One part of the plurality of through holes 16 is used to install the fasteners 3, and the other part of the plurality of through holes 16 is used to install wires so that the power generation element 22 can be connected to an external device through the wires. Specifically, as Figure 1 shown, one part of the through holes 16 is mounting holes, and the fasteners 3 can be installed in the mounting holes, or the wires pass through the mounting holes and are respectively connected to the power generation element 22 and the detection device, so that the electrical signal generated by the power generation element 22 is transmitted into the detection device through the wires. The other part of the through holes 16 can be oil injection holes. Thus, the bearing 1 can be oiled through the oil injection holes.

[0038] In some embodiments, the mounting member 21 is provided with a mounting hole that axially penetrates the mounting member 21. The power generating member 22 is provided with a mounting shaft 23, and the mounting shaft 23 is inserted into the mounting hole and connected to the fastening member 3 so that the power generating member 22 is mounted on the mounting member 21. Specifically, as Figure 6 shown, a threaded mounting shaft extending in the vertical direction is fixed to the lower end of the power generating member 22. The mounting shaft is inserted into the mounting hole and connected by a fastening member 3 (for example, a fixing nut and a gasket), so that the mounting shaft is detachably mounted on the mounting ring through the fixing nut, and the distance between the power generating member 22 and the mating portion 15 is adjusted by the gasket, making the power generation device 2 more reasonably arranged.

[0039] In some embodiments, the bearing 1 is a double-row tapered roller bearing 1. Since the railway axle box needs to bear the wheel-rail impact load (up to 3-5 times the axle weight), the double-row tapered roller bearing 1 shares the load through double rows of rollers (the first rolling unit 12 and the second rolling unit 13), and the self-guiding characteristic of the double-row tapered roller bearing 1 enables the metal ring 14 to be dynamically centered with the power generation device 2, reducing the radial runout, reducing the fluctuation of the magnetic circuit gap, and improving the power generation efficiency of the power generating member 22.

[0040] In some embodiments, the mounting member 21 is a nylon ring. Since the nylon ring can form an effective magnetic shielding layer, reducing the magnetic leakage coefficient of the generator, avoiding the eddy current loss caused by the metal mounting member 21, and improving the power generation efficiency of the power generating member 22.

[0041] In some embodiments, one side of the power generating member 22 facing the mating portion 15 is the first surface, and one side of the mating portion 15 facing the generator is the second surface. The distance between the first surface and the second surface is not less than 1 mm. Specifically, one side of the generator facing the mating portion 15 is the first surface, and one side of the mating portion 15 facing the generator is the second surface. The first surface and the second surface are parallel (in other words, the magnet surface of the power generating member 22 is parallel to the surface of the mating portion 15). The distance between the magnet surface of the power generating member 22 and the surface of the mating portion 15 is the minimum air gap distance between the two. Since the smaller the minimum air gap distance, the greater the output of the power generating member 22. If the first surface and the second surface are not parallel, then only a small part of the distance between the power generating member 22 and the mating portion 15 is the minimum air gap distance, and the air gap distances of the remaining parts are greater than the minimum air gap distance, resulting in unstable output power of the power generating member 22. Therefore, the first surface and the second surface are parallel, ensuring the stability of the output of the power generating member 22.

[0042] In some embodiments, the distance is not less than 1 mm. Thus, contact friction can be avoided from damaging the mating portion 15 and the magnet surface of the power generating member 22, ensuring the output efficiency of the power generating member 22.

[0043] Next, according to the attached Figure 1-6Specifically describe the variable reluctance power generation system 100 based on a railway axle box bearing. The variable reluctance power generation system 100 based on a railway axle box bearing is a system that can be integrated into the railway axle box bearing 1 and converts the mechanical energy of the rotation of the bearing 1 into an electrical signal through the variable reluctance effect during operation. Utilizing the internal space of the bearing 1, according to the phase distribution, the power generation components 22 are connected to the mounting component 21 through the iron core and fixing nuts. The mounting component 21 is fixedly connected to the bearing 1 through the through holes 16 of the bearing 1 and the lead-out holes of the mounting component 21 using connecting bolts and connecting nuts. The designed power generation components 22, the metal ring 14 and the conventional railway axle box bearing 1 are integratedly designed. This structure is compact, does not change the inherent structure of the bearing 1, does not interfere with the operation of the bearing 1, and there is no need to transform the installation environment of the bearing 1. The number of mounting holes of the mounting component 21 is equal to the number of teeth of the toothed metal ring 14, and the position distribution of the mounting holes conforms to the phase distribution.

[0044] When the bearing 1 rotates, the teeth of the metal ring 14 periodically pass through the magnetic circuit composed of the coil, the magnet and the iron core, causing a change in magnetic resistance, thereby generating an induced current in the coil, and outputting the magnetoelectric signal to the external load circuit through the lead-out wires and wire connections on the coil. The frequency and peak value of the current signal are both directly proportional to the rotational speed. At the same time, the parameters of the electrical signal are changed by changing the number of power generation components 22, the number of gaskets, the stator material and the number of turns of the coil.

[0045] According to the above description, the advantages (or the deficiencies of the prior art are solved) of a variable reluctance power generation system 100 based on a railway axle box bearing are as follows:

[0046] (1) This power generation system is highly adaptable to the structure of the railway axle box bearing 1 and does not require changing the main structure of the bearing 1. It avoids the problems of complex wiring or adding external power sources required by traditional monitoring systems, improves the installation efficiency and economic feasibility of the system, and at the same time ensures the smooth operation of the bearing 1. Railway axle box bearings 1 are usually under high speed, heavy load and complex working conditions. Traditional monitoring systems often require additional power supply equipment and complex wiring, while this system directly obtains energy from the rotation of the bearing 1 through a variable reluctance generator, achieving self-power supply and reducing the dependence on external power sources.

[0047] (2) The variable reluctance power generation system based on the structure of the railway axle box bearing 1 has a simple structure and is easy to install. For the special application scenario of the railway axle box bearing 1, it has the potential to solve the power supply problem for the fault detection of the railway axle box bearing 1. This system fills the application gap of variable reluctance intelligent bearings 1 in the field of self-power supply for railway axle box bearings 1, provides a practical solution for the intelligent operation and maintenance system of railway transportation, and at the same time opens up new ideas for the intelligent monitoring and maintenance of other rotating machinery.

[0048] (3) By analyzing the variation curves of the load with current and voltage, the optimal load and the maximum output power can be obtained through analysis, so as to realize driving some small power devices with the electric energy generated by the variable reluctance effect. This system can not only provide continuous power support for the wireless sensor network, but also further improve the energy conversion efficiency by optimizing design parameters (such as the number of coil turns, the spacing between the coil and the toothed metal ring 14, the core material, etc.), ensuring the stable operation of the system under complex working conditions. In addition, this system can also be combined with other energy harvesting technologies to form a hybrid energy harvesting system to cope with more complex application scenarios.

[0049] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the 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 construed as a limitation of the present invention.

[0050] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying 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 the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0051] In the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected to", "fixed" and other terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Also, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0053] In the present invention, the terms "an embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0054] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A variable reluctance power generation system based on railway axle box bearings, characterized in that, Comprising: A bearing, the bearing includes an outer ring, a first rolling element, a second rolling element and a metal ring. The first rolling element, the metal ring and the second rolling element are sequentially arranged inside the outer ring and are all rotatable relative to the outer ring about the axis of the outer ring. A mating portion is provided on the outer peripheral surface of the metal ring; A power generation device, the power generation device includes a mounting member and a power generation member. The mounting member is detachably arranged inside the outer ring and is connected to the outer ring. The mounting member is sleeved outside the metal ring and is arranged at a radial interval relative to the metal ring along the bearing. The power generation member is arranged on the mounting member and is arranged at a radial interval relative to the mating portion along the bearing. The power generation member can generate a magnetic field and cooperate with the mating portion, so that when the metal ring drives the mating portion to rotate, the mating portion drives the power generation member to generate a variable reluctance effect to generate an induced current.

2. The variable reluctance power generation system based on a railway axle box bearing according to claim 1, wherein The number of the mating portions is multiple, and the multiple mating portions are arranged at intervals along the circumferential direction of the metal ring. The power generation members are multiple, and the multiple power generation members are arranged at intervals around the circumferential direction of the mounting member. The multiple power generation members and the multiple mating portions are arranged in one-to-one correspondence along the axis of the outer ring.

3. The variable reluctance power generation system based on a railway axle box bearing according to claim 2, wherein The multiple power generation members are sequentially connected in series to form a power generation assembly, and the power generation assembly is used to be connected to an external device.

4. The variable reluctance power generation system based on a railway axle box bearing according to claim 2, characterized in that, The number of the multiple mating portions is equally spaced along the circumferential direction of the metal ring, and the multiple power generation members are equally spaced around the circumferential direction of the mounting member.

5. The variable reluctance power generation system based on a railway axle box bearing according to claim 1, wherein, A through hole penetrating the outer ring along the radial direction of the bearing is provided on the outer ring, so that a fastener can pass through the through hole and be connected to the mounting member.

6. The variable reluctance power generation system based on a railway axle box bearing according to claim 1, wherein, The through holes are multiple, and the multiple through holes are arranged at intervals along the circumferential direction of the outer ring. One part of the multiple through holes is used for installing fasteners, and the other part of the multiple through holes is used for installing wires, so that the power generation members can be connected to an external device through the wires.

7. The variable reluctance power generation system based on a railway axle box bearing according to claim 1, wherein A mounting hole penetrating the mounting member along the axial direction of the mounting member is provided on the mounting member. A mounting shaft is provided on the power generation member, and the mounting shaft is inserted into the mounting hole and connected to the fastener, so that the power generation member can be mounted on the mounting member.

8. The variable reluctance power generation system based on a railway axle box bearing according to claim 1, characterized in that, The bearing is a double-row tapered roller bearing, the mounting member is a nylon ring, and the power generation member is a variable reluctance generator.

9. The variable reluctance power generation system based on a railway axle box bearing according to claim 1, wherein One side of the power generation member facing the mating portion is the first surface, and one side of the mating portion facing the power generation member is the second surface. The first surface and the second surface are parallel, and the distance between the first surface and the second surface is not less than 1 mm.

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