Tubular linear electric generator

Abstract

The utility model provides a kind of tubular linear generator, the tubular linear generator includes: winding post, the tubular magnet bar of being passed in the winding post;The winding post is hollow cylindrical, the outer periphery of the winding post is equipped with a plurality of tooth slot interval, the tooth slot is used to wind multiple layer coil, the coil in each tooth slot is in turn connected;The tubular magnet bar is by multiple circular magnet ring and magnetically conductive torus iron block alternately arranged, the middle of the tubular magnet bar is penetrated by a iron bar, the both ends of the iron bar are provided with limiting device;The circular magnet ring is staggered with the coil arrangement.The utility model tubular linear generator simple structure, by optimizing on structure, then assembling makes that coil and magnet utilization maximization, can generate maximum power under minimum energy.

Description

Technical Field

[0001] This utility model relates to the field of linear generator technology, and in particular to a tubular linear generator suitable for linear reciprocating vibration scenarios such as wave energy and wind energy. Background Technology

[0002] Generator technology has a long history, and the main types currently include rotary generators, linear generators, and triboelectric nanogenerators. Among them, rotary generators have the highest power generation efficiency. They consist of a stator and a rotor. Driven by external energy, the rotor rotates at high speed, continuously cutting the stator to generate electricity. Although it has the highest efficiency, it must meet the characteristics of rotation, which means that it is not suitable for certain energy harvesting scenarios, such as wave energy on the ocean and bladeless wind turbines. The energy generated in these two typical scenarios is oscillating and reciprocating, so linear generators are more suitable.

[0003] Linear generators can vary in appearance, but their underlying principle involves the interlocking of a mover and a stator. For example, the improved tubular generator (CN101107770B), the wave-shaped linear generator unit (CN 101994639 B), and the linear generator (CN201018390Y) all feature a central magnet mover surrounded by stator coils. However, none of these patents mention how to calculate power generation efficiency; they only describe structural feasibility. This makes it difficult for those skilled in the art to understand the assembly of the magnet and coils, or the relationship between the number of coil turns and energy movement. Utility Model Content

[0004] The main objective of this invention is to provide a tubular linear generator. By optimizing the structure and maximizing the utilization of the coils and magnets through assembly, a novel tubular linear generator can be developed to generate the maximum power output with the minimum energy. Simultaneously, the induced voltage in the coils and the motion relationship of the mover are obtained through simulation software to enable those skilled in the art to better calculate the generator's power generation efficiency.

[0005] To achieve the above objectives, this utility model proposes a tubular linear generator, comprising: a winding post and a tubular magnet rod passing through the winding post;

[0006] The winding post is a hollow cylinder, and several toothed grooves are spaced apart on the outer circumference of the winding post. The toothed grooves are used to wind multi-layer coils, and the coils in each toothed groove are connected in series.

[0007] The tubular magnet rod consists of multiple circular magnet rings and magnetically conductive circular iron blocks arranged alternately. An iron rod runs through the middle of the tubular magnet rod, and limit devices are provided at both ends of the iron rod.

[0008] A further technical solution of this utility model is that the polarity of the magnet ring is arranged in the manner of SN|NS|SN|NS.

[0009] A further technical solution of this utility model is that the winding post is made of austenitic stainless steel.

[0010] A further technical solution of this utility model is that the height of the tooth groove is 10mm, the groove depth is 20mm, the diameter of the wound copper wire is 0.3mm, and the number of turns is 1000 turns.

[0011] A further technical solution of this utility model is that the materials of the magnetically conductive circular iron block and the iron rod are DT4C.

[0012] A further technical solution of this utility model is that the thickness of the magnetically conductive circular iron block is 10mm and the diameter is 25mm.

[0013] A further technical solution of this utility model is that the thickness of the circular magnet ring is 10mm and the diameter is 25mm.

[0014] The beneficial effects of this utility model of tubular linear generator are:

[0015] This utility model, through the above-mentioned technical solution, includes: a winding post and a magnetic rod inserted inside the winding post; the winding post is a hollow cylinder, and several toothed grooves are spaced apart on the outer circumference of the winding post, the toothed grooves are used to wind multi-layer coils, and the coils in each toothed groove are connected in series; the tubular magnetic rod consists of multiple circular magnetic rings and magnetically conductive circular iron blocks arranged alternately, with an iron rod penetrating through the middle of the tubular magnetic rod, and limit devices provided at both ends of the iron rod. It can generate electricity with relatively small energy, and has a simple structure and low cost. It can adjust relevant parameters through a pre-set power generation calculation strategy of the tubular linear generator, such as modifying the magnetism of the circular magnetic rings, the number of coil turns, the amplitude and frequency of motion, etc., and calculate the current based on the resistance of connected electrical appliances and other equipment, thereby achieving the maximum power generation with the minimum energy. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the tubular linear generator of this utility model;

[0017] Figure 2 This is a schematic diagram of the winding post structure;

[0018] Figure 3 It is a schematic diagram of the assembly structure of the tubular magnet rod and the winding post;

[0019] Figure 4 This is a two-dimensional model schematic diagram of the tubular linear generator of this utility model;

[0020] Figure 5 This is a two-dimensional schematic diagram of magnetic flux density;

[0021] Figure 6 This is a three-dimensional schematic diagram of magnetic flux density;

[0022] Figure 7 This is a schematic diagram of induced voltage;

[0023] Figure 8 This is a displacement diagram.

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0025] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0026] To maximize the utilization of coils and magnets and generate the maximum power output with minimal energy, this invention proposes a tubular linear generator suitable for ocean wave energy and bladeless wind turbines.

[0027] like Figures 1 to 3 As shown, a preferred embodiment of the tubular linear generator of this utility model includes a winding post 10 and a tubular magnet rod 20 passing through the winding post 10.

[0028] The winding post 10 is a hollow cylinder, and a number of slots 30 are provided at intervals on the outer circumference of the winding post 10. The slots 30 are used to wind multi-layer coils, and the coils in each two adjacent slots 30 are connected in series.

[0029] In this embodiment, the winding post 10 is made of austenitic stainless steel. The winding post 10 is a hollow cylinder with several toothed grooves 30, the hollow part in the middle can just accommodate the sliding of the mover, and the wall thickness is 1mm to ensure that the air gap between the mover magnet and the coil is very small.

[0030] The groove 30 is preferably 10mm high and 20mm deep, capable of accommodating approximately 1000 turns of copper wire with a diameter of about 0.3mm. The coils are connected in series, with the upper and lower layers connected sequentially from top to bottom. This connection method allows the induced positive voltage generated by each layer of coils to accumulate, maximizing the induced voltage result.

[0031] The tubular magnet rod 20 consists of multiple circular magnet rings 40 and magnetically conductive circular iron blocks 50 arranged alternately. An iron rod 60 passes through the middle of the tubular magnet rod 20. Limiting devices are provided at both ends of the iron rod 60. When the tubular magnet rod is inserted into the winding post 10, the coil and the multiple circular magnet rings 40 are arranged alternately.

[0032] In this embodiment, the polarity of the magnet ring 40 is arranged in the manner of SN|NS|SN|NS.

[0033] In this embodiment, the magnetically conductive circular iron block 50 and the iron rod 60 are made of DT4C. The magnetically conductive circular iron block 50 is preferably 10mm thick and 25mm in diameter. The circular magnet ring 40 is preferably 10mm thick and 25mm in diameter.

[0034] When assembling the circular magnet ring 40 and the magnetically conductive circular iron block 50, first pass through a DT4C material circular magnet ring 40, which is then limited by a limiting device at one end of the iron rod 60. Then, the magnetically conductive circular iron block 50 and the circular magnet ring 40 are placed in sequence, spaced apart by the DT4C material magnetically conductive circular iron block 50. The circular magnet rings 40 are arranged in a polarity sequence of SN|NS|SN|NS, and so on. Finally, the magnetically conductive circular iron block 50 is added, and limited by a limiting device at the other end of the iron rod 60. After assembling the tubular magnet rod 20, insert the tubular magnet rod 20 into the hollow center of the winding post 10.

[0035] When the tubular magnet rod 20 moves relative to the winding post 10, the coil moves relative to the circular magnet ring 40, and the coil cuts the magnetic field lines, causing the coil to generate an alternating voltage.

[0036] It should be noted that the tubular linear generator of this utility model can adjust relevant parameters through a pre-set power generation calculation strategy, such as modifying the magnetism of the circular magnet ring 40, the number of coil turns, the amplitude of motion, and the frequency, and calculate the current based on the resistance of connected electrical appliances and other equipment, so as to generate the maximum power generation with the minimum energy.

[0037] The power generation calculation strategy for this tubular linear generator includes the following steps:

[0038] Step S10: Establish a two-dimensional axisymmetric rectangular simulation model of the tubular linear generator. The model includes a magnet ring region 1, a magnetically conductive circular iron block region 2, a support structure region 3, and a coil region 4. The magnet ring region and the coil region are arranged alternately.

[0039] To reduce the computational load of the simulation, the power generation calculation strategy for this tubular linear generator uses a two-dimensional axisymmetric rectangle as the model, which is then rotated around a rotation axis to obtain the overall result. The circular magnet rings on the tubular magnet rod and the coils on the winding column are arranged alternately. After the model is established, it looks like... Figure 4 The planar model shown Figure 4 In the diagram, 1 is the magnet ring area, 2 is the magnetic conductive ring iron block area, 3 is the stainless steel support structure area, and 4 is the coil area.

[0040] Step S20, define material properties: the conductivity of the magnet ring is 7.1429E5S / m, the residual magnetic flux density modulus is 1.4T, the restoring permeability is 1.05, the relative permittivity is 1, the coil is made of copper, the winding post is made of austenitic stainless steel, and the material of the magnetic ring iron block and iron rod is DT4C.

[0041] Step S30, Mesh Construction: Divide the simulation model into a mesh and construct a triangular mesh.

[0042] Step S40, Determine the deformation: Using the moving mesh method, specify the sinusoidal motion deformation in the Z direction as: dZ=0.02*sin((2*pi / 0.2[s]*t), where 0.02 is the vibration amplitude of 20mm, t is the time, and 0.2 is the motion period, representing a period of 0.2s, which is the frequency of 5Hz.

[0043] Step S50, magnetic field definition: Set up the magnet rings in the magnet ring region according to the polarity order SN|NS|SN|NS; set the coil region as a homogeneous multi-turn coil with 1000 turns, 0 current, 6e7S / m conductivity of the coil wire, and 0.4mm diameter of the coil wire cross-section.

[0044] Regarding the definition of the magnetic field, the magnet module in the power generation calculation strategy of this tubular linear generator specifies... Figure 4 The two-dimensional model diagram shows a rectangle on the left representing a magnet, defined as north and south poles according to SN|NS|SN. The Ampere's Law module in solids uses the central spacer ring iron column. This module refers to the fact that in the solid conductor region, Ampere's Law must consider the material's conductivity, induced current, and velocity term (moving conductor effect). Its magnetization model is chosen as the BH curve. The coil module uses the outer rectangles, which are the upper and lower rectangles of the left-side magnet rectangle. This module uses a homogeneous multi-turn wire model, a current of 0A, 1000 turns, a wire conductivity of 6e7S / m, and a wire cross-sectional area of ​​0.4mm².

[0045] Step S60, Configure the solver: First, obtain the initial state through steady-state solution, set the output time step size through transient solution, and then set the steady-state solution step and transient solution step to be fully coupled. Define the partial derivative matrix with respect to the unknown in each iteration, that is, select the Jacobian matrix to update in each iteration.

[0046] Step S70, Calculation and Analysis: Perform calculations on the model and its settings.

[0047] Step S80, Post-processing: Plot the magnetic flux density, rotational geometry, and voltage displacement to obtain the linear generator results under the simulation model.

[0048] like Figures 5 to 8 As shown, Figure 5 This is a two-dimensional graph of magnetic flux density. Figure 6 A three-dimensional plot of magnetic flux density. Figure 7 This is a schematic diagram of induced voltage. Figure 8 This is a schematic diagram of the displacement.

[0049] In step S80

[0050] The expression for the global induced voltage display is:

[0051] mf.VCoil_1-mf.VCoil_2+mf.VCoil_3-mf.VCoil_4+mf.VCoil_5-mf.VCoil_6+mf.VCoil_7-mf.VCoil_8;

[0052] The expression for displacement is:

[0053] 0.02*sin((2*pi / 0.2[s])*t).

[0054] As one implementation scheme, in this embodiment, after step S80, the method further includes:

[0055] Step S90: Compare the experimental results with the simulation results to determine the accuracy of the simulation model.

[0056] The power generation calculation strategy for this tubular linear generator requires experimental comparison with the simulation model. This involves comparing the simulation results with experimental results to determine the accuracy of the simulation model. Experimental research involved applying a sinusoidal displacement of 5Hz and 2cm amplitude to the physical model, then connecting the upper and lower coils in reverse series, sequentially from top to bottom, to form a single unit. Finally, a multimeter was used to measure the induced voltage. The experimental results were compared to verify the accuracy of the simulation model. Subsequently, researchers in this field can quickly obtain the induced voltage by modifying the magnet's magnetism, the number of coil turns, the amplitude of the motion, and the frequency within the model. Based on the resistance of connected electrical appliances and other equipment, the current can be calculated, ultimately yielding the power generation efficiency.

[0057] Bladeless wind turbines obtain wind energy in a different way than traditional three-bladed rotor generators. They mostly utilize the vibration of the rotor shaft to generate electricity, thus requiring a suitable linear generator as the power generation component. The following describes the experimental process of an 8-tooth tubular linear generator as an example.

[0058] Before the experiment, prepare the relevant materials, such as a copper coil with a diameter of 0.4mm, an 8-tooth tubular structure, an iron rod, a circular magnet ring, a magnetically conductive circular iron block, and several tools. Then assemble the tubular linear motor according to the following steps and conduct the experiment.

[0059] Step S1: Wind 8 coils. Wind the coil 1000 turns clockwise around the winding post. Connect the upper and lower layers of coils in opposite directions to form a single unit and connect the two wire ends to a multimeter in AC voltage mode.

[0060] Step S2: Assemble the tubular magnet rod. First, pass a DT4C circular iron ring through the rod and weld it to the iron rod as a limiting device. Then, insert circular magnet rings at intervals, with the DT4C's outgoing circular iron blocks separating the magnet rings. The magnet rings are arranged in the polarity SN|NS|SN|NS pattern, and so on. Finally, add circular iron blocks and weld them to the iron rod as limiting devices.

[0061] Step S3, Experimental Study. Apply a sinusoidal reciprocating motion with an amplitude of 20 mm and a vibration frequency of 5 Hz, and then record the voltage when it stabilizes.

[0062] After obtaining experimental results, the power generation calculation strategy of this tubular linear generator is compared with the simulation model to determine the accuracy of the simulation model. Subsequently, computational personnel in this field can quickly obtain the induced voltage by modifying the magnet's magnetism, the number of coil turns, the amplitude of motion, and the frequency in the model. Based on the resistance of connected electrical appliances and other equipment, the current is calculated, and finally, the power generation efficiency is obtained.

[0063] The beneficial effects of this utility model of tubular linear generator are:

[0064] This utility model, through the above-mentioned technical solution, includes: a winding post and a magnetic rod inserted inside the winding post; the winding post is a hollow cylinder, and several toothed grooves are spaced apart on the outer circumference of the winding post, the toothed grooves are used to wind multi-layer coils, and the coils in each toothed groove are connected in series; the tubular magnetic rod consists of multiple circular magnetic rings and magnetically conductive circular iron blocks arranged alternately, with an iron rod penetrating through the middle of the tubular magnetic rod, and limit devices provided at both ends of the iron rod. It can generate electricity with relatively small energy, and has a simple structure and low cost. It can adjust relevant parameters through a pre-set power generation calculation strategy of the tubular linear generator, such as modifying the magnetism of the circular magnetic rings, the number of coil turns, the amplitude and frequency of motion, etc., and calculate the current based on the resistance of connected electrical appliances and other equipment, thereby achieving the maximum power generation with the minimum energy.

[0065] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural changes made based on the contents of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A tubular linear generator, characterized in that, include: A winding post and a tubular magnet rod inserted inside the winding post; The winding post is a hollow cylinder, and several toothed grooves are spaced apart on the outer circumference of the winding post. The toothed grooves are used to wind multi-layer coils, and the coils in each toothed groove are connected in series. The tubular magnet rod consists of multiple circular magnet rings and magnetically conductive circular iron blocks arranged alternately. An iron rod runs through the middle of the tubular magnet rod, and limit devices are provided at both ends of the iron rod. The circular magnet rings and the coil are arranged alternately.

2. The tubular linear generator according to claim 1, characterized in that, The polarity of the magnet rings is arranged in the manner of SN|NS|SN|NS.

3. The tubular linear generator according to claim 1, characterized in that, The winding post is made of austenitic stainless steel.

4. The tubular linear generator according to claim 1, characterized in that, The tooth groove has a height of 10mm, a groove depth of 20mm, a copper wire diameter of 0.3mm, and 1000 turns.

5. The tubular linear generator according to claim 1, characterized in that, The magnetically conductive circular iron block and the iron rod are made of DT4C.

6. The tubular linear generator according to claim 1, characterized in that, The magnetically conductive circular iron block has a thickness of 10mm and a diameter of 25mm.

7. The tubular linear generator according to claim 1, characterized in that, The circular magnet ring has a thickness of 10mm and a diameter of 25mm.

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