CN112491239B - Cut-off type electromagnetic vibration power generation device - Google Patents
Cut-off type electromagnetic vibration power generation device Download PDFInfo
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- CN112491239B CN112491239B CN202011239946.5A CN202011239946A CN112491239B CN 112491239 B CN112491239 B CN 112491239B CN 202011239946 A CN202011239946 A CN 202011239946A CN 112491239 B CN112491239 B CN 112491239B
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- 238000010248 power generation Methods 0.000 title claims description 12
- 239000011553 magnetic fluid Substances 0.000 claims abstract description 27
- 239000002245 particle Substances 0.000 claims abstract description 21
- 239000000696 magnetic material Substances 0.000 claims abstract description 16
- 230000006698 induction Effects 0.000 claims abstract description 14
- 238000004804 winding Methods 0.000 claims abstract description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000004907 flux Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000003306 harvesting Methods 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K44/00—Machines in which the dynamo-electric interaction between a plasma or flow of conductive liquid or of fluid-borne conductive or magnetic particles and a coil system or magnetic field converts energy of mass flow into electrical energy or vice versa
- H02K44/08—Magnetohydrodynamic [MHD] generators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K35/00—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit
- H02K35/02—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit with moving magnets and stationary coil systems
Abstract
A cut-off type electromagnetic vibration generating set comprises a permanent magnet, magnet yokes, induction coils, magnetic flow tubes, magnetic fluids and vibration particles, wherein the permanent magnet is made of hard magnetic materials, the left side of the permanent magnet is provided with an N pole, the right side of the permanent magnet is provided with an S pole, two identical magnet yokes are respectively connected to two ends of the permanent magnet and respectively become a left magnet yoke and a right magnet yoke, each magnet yoke is made of soft magnetic materials with good magnetic conductivity, a shallow blind hole is formed in each magnet yoke and used for placing the permanent magnet to wind the induction coils, a shaft for winding the induction coils is arranged on each magnet yoke, and a mounting short shaft for mounting the magnetic flow tubes is respectively arranged on each magnet yoke; the magnetic flow tube is made of non-magnetic materials, mounting holes are formed in two ends of the magnetic flow tube and are mounted on mounting shafts of the two magnetic yokes, a cavity is formed in the middle of the magnetic flow tube, magnetic fluid capable of conducting magnetic is arranged in the cavity of the magnetic flow tube, and a plurality of vibrating particles are arranged in the cavity of the magnetic flow tube and are all made of non-magnetic materials. The invention has the advantages of closed magnetic circuit, no need of considering positioning force, simple structure and easy processing.
Description
Technical Field
The invention relates to a power generation device, in particular to an electromagnetic vibration power generation device.
Background
If the energy generated by the vibration is collected, the low-frequency vibration is used for replacing a battery to supply power for low-power consumption equipment such as a micro sensor network node or an Internet of things node, so that the environmental pollution caused by the battery is reduced, and the limitation of the service life of the battery on the service life of the node is broken through.
In general, when energy is collected from low-frequency vibration, the electromagnetic vibration energy collecting technique is considered to be more suitable than the piezoelectric type and the electrostatic type. However, the electromagnetic vibration energy harvesting technology still has the following problems to be improved:
1. in the electromagnetic vibration power generation devices discussed in a great deal of literature, a closed magnetic circuit is not realized (early studies can be seen in Beeby S P, Torah R N, Tudor M J, et al. A micro electromagnetic generator for vibration Energy harnessing [ J ]. Journal of micro-mechanics and micro-engineering, 2007,17(7):1257. Beeby S P, Torah R N, Tudor M J, etc.. A micro electromagnetic power generation device for vibration Energy collection. micro-mechanics and micro-engineering Journal, 2007,17(7):1257 ", recent studies can be seen in Aldawood G, Nguyen H T, Barweel H.high power dense-assisted damping-electromagnetic power generation device for vibration Energy collection, high power linear damping-Energy spring for application of electromagnetic vibration Energy H-assisted vibration Energy spring, low power vibration Energy spring 113546, low power vibration Energy spring for application of electromagnetic vibration Energy devices, Skayak H, Skayak M J, 2019,253:113546. ", review article can see" Carneiro P, dos Santos M P S, Rodrigues A, et al, Electromagetic Energy harvesting using magnetic navigation architecture: A review [ J ]. Applied Energy,2020,260:114191. namely: carneiro P, dos Santos M P S, Rodrigues A et al review: the energy source is 2020,260: 114191), namely magnetic lines of force pass through a long distance in a medium with large magnetic resistance such as air and the like, so that the magnetic induction intensity is inevitably reduced, the generated power is extremely unfavorable to increase, and on the contrary, the energy collection power is greatly increased if a closed magnetic circuit is realized.
2. In view of the above problems, an electromagnetic vibration power generation device having a closed magnetic circuit has been studied. For example, the invention patent of application No. 201510247482.5, "a vibration energy harvesting device", and the invention patent of application No. 201510246013.1, "a rolling vibrator linear vibration energy harvesting device". The problems with these designs are: the closed magnetic circuit can generate a large positioning force, so that a symmetrical magnet yoke structure is adopted to balance the positioning force of the vibrator, the structure is too complex, the requirement on the machining precision of the teeth on the magnet yoke is high, the magnetic force between the vibrator and the magnet yoke in the closed magnetic circuit is large, the positioning force cannot be completely balanced as a result of the dimension error of the teeth, the vibrator with low quality cannot move flexibly or even cannot move, and the energy collection efficiency is seriously influenced.
Aiming at the problems, the magnetic vibration power generation device which is simple in structure, low in requirement on machining precision, free of positioning force interference and provided with a closed magnetic circuit is researched, and reliable and environment-friendly energy can be provided for nodes of the Internet of things such as RFID labels, sensor nodes and other low-power-consumption information equipment.
Disclosure of Invention
In order to solve the problems that an existing electromagnetic vibration energy collecting mode is not provided with a closed magnetic circuit or the positioning force is difficult to balance, the invention provides the electromagnetic linear vibration generating device which is provided with the closed magnetic circuit and does not need to consider the positioning force, and is simple in structure and easy to process.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a cut-off type electromagnetic vibration generating set comprises a permanent magnet, magnet yokes, an induction coil, a magnetic flow tube, magnetic fluid and vibration particles, wherein the permanent magnet is made of hard magnetic materials, the left side of the permanent magnet is provided with an N pole, the right side of the permanent magnet is provided with an S pole, two identical magnet yokes are respectively connected to two ends of the permanent magnet and respectively become a left magnet yoke and a right magnet yoke, each magnet yoke is made of soft magnetic materials with good magnetic conductivity, a shallow blind hole is formed in each magnet yoke and used for placing the permanent magnet, a shaft for winding the induction coil is arranged on each magnet yoke, and a mounting short shaft for mounting the magnetic flow tube is respectively arranged on each magnet yoke; the magnetic flow tube is made of non-magnetic materials, mounting holes are formed in two ends of the magnetic flow tube and are mounted on mounting short shafts of the two magnetic yokes, a cavity is formed in the middle of the magnetic flow tube, magnetic fluid capable of conducting magnetic is arranged in the cavity of the magnetic flow tube, and a plurality of vibrating particles are arranged in the cavity of the magnetic flow tube and are all made of non-magnetic materials.
Further, the vibrating particles are balls made of materials such as aluminum or nonmagnetic stainless steel.
The technical conception of the invention is as follows: under the action of vibration, a closed magnetic circuit formed by the permanent magnet, the magnet yoke and the magnetic fluid is interrupted by vibration particles, and the magnetic fluid can self-repair the closed magnetic circuit, so that the closed magnetic circuit and the magnetic flux of the coil are continuously changed, and the coil can generate induction voltage. The magnetic flux in the coil is changed sharply in the vibration process, induced electromotive force is generated, and energy collection is achieved. On the other hand, the magnetic flux in the coils changes synchronously in the vibration process, so that the different ends of the two coils are connected in series to superpose the induced electromotive forces of the coils. The two magnetic yokes in the device have positioning force on the magnetic fluid, but the positioning force can not prevent the vibration particles from breaking the magnetic fluid liquid injection in the circumferential direction as long as the magnetic flow tube is in the axial direction, so that the adverse effect of the positioning magnetic force is eliminated in principle, and the positioning magnetic force is used for attracting the magnetic fluid to automatically repair the closed magnetic circuit.
The size of a magnetic flow tube cavity in the device is an important control parameter, the self-repairing of a closed magnetic circuit is influenced if the size is larger, and the vibration is inhibited if the size is smaller. In addition to the size of the cavity itself, the vibrating pellet loading can also adjust the size and effectiveness of the cavity. In addition, the viscosity coefficient of the magnetic fluid itself will also affect the speed of the closed magnetic circuit breaking and self-repairing.
The invention has the beneficial effects that: the on-off operation of the air-gap-free closed magnetic circuit is carried out, so that the energy collection efficiency is high; the magnetic fluid is utilized to eliminate the adverse effect of the positioning force and make the positioning force become the repairing force of the closed magnetic circuit; simple structure and extremely low requirement on processing precision.
Drawings
Fig. 1 is a structural view of the inside of a truncated electromagnetic vibration power generation device, in which 1 a permanent magnet, 2 a magnetic yoke, 3 an induction coil, 4 a magnetic flow tube, 5 a magnetic fluid, and 6 a vibrating particle.
Fig. 2 is a schematic view of a yoke.
Fig. 3 is a schematic diagram of an induction coil.
Fig. 4 is a schematic view of a magnetic flow tube.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1 to 4, a cut-off type electromagnetic vibration power generation device comprises a permanent magnet 1, a magnet yoke 2, an induction coil 3, a magnetic flow tube 4, a magnetic fluid 5 and a vibrating particle 6, wherein the permanent magnet 1 is made of a hard magnetic material, the left side is an N pole, the right side is an S pole, the permanent magnet is connected with two identical magnet yokes 2 respectively at the two poles of the permanent magnet 1 to form a left magnet yoke and a right magnet yoke respectively, the magnet yokes are made of a soft magnetic material with good magnetic conductivity, each magnet yoke is provided with a shallow blind hole for accommodating the permanent magnet 1, a shaft for winding the induction coil 3 is arranged, and each magnet yoke is provided with an installation short shaft for installing the magnetic flow tube; the magnetic flow tube 4 is made of non-magnetic materials, such as acrylic materials, mounting holes are formed in two ends of the magnetic flow tube, the magnetic flow tube and the mounting short shafts of the two magnetic yokes are mounted, a cavity is formed in the middle of the magnetic flow tube 4, magnetic fluid 5 capable of conducting magnetic is arranged in the cavity of the magnetic flow tube, a plurality of vibrating particles 6 are arranged in the cavity of the magnetic flow tube, the vibrating particles 6 are all non-magnetic materials, and balls made of aluminum, non-magnetic stainless steel and the like are suitable to be selected.
In the embodiment, under the vibration effect, the closed magnetic circuit formed by the permanent magnet 1, the magnetic yoke 2 and the magnetic fluid 5 is interrupted by the vibration particles, and the magnetic fluid can self-repair the closed magnetic circuit, so that the closed magnetic circuit and the coil magnetic flux are continuously changed, and the coil can generate induction voltage. To illustrate the variations, consider the following two cases:
1) under the low-frequency vibration, when the vibration particles are all positioned at the bottom of the cavity of the magnetic flow tube, the vibration particles are attracted by the two magnetic yokes under the action of the magnetic field of the permanent magnet, the magnetic fluid automatically flows to the two sides of the magnetic flow tube, and the internal space of the cavity of the magnetic flow tube is small, so that the magnetic fluid cannot be divided into two strands without external interference. Therefore, magnetic force lines are emitted by the N pole of the permanent magnet, sequentially pass through the left magnetic yoke, the magnetic fluid and the right magnetic yoke and return to the S pole of the permanent magnet to form a closed magnetic circuit, no air gap exists in the magnetic circuit, and the efficiency of the permanent magnet is fully utilized. In this case, magnetic flux in the coils of the left and right yokes is maximized. The requirement that the magnetic fluid is automatically switched on and closed magnetic circuit is realized,
2) under low frequency vibration, when the vibrating particles move in the middle of the magnetic flow tube cavity in the vibration process, no matter the vibrating particles move upwards or downwards, the vibrating particles break or at least impact the magnetic fluid. Then, the closed magnetic circuit also receives an impact, and the magnetic resistance thereof is much higher than that in the case of the 1 st case, so that the magnetic flux in the coils in the left and right yokes drops sharply.
The analysis shows that the magnetic flux in the coil is changed sharply in the vibration process, induced electromotive force is generated, and energy collection is achieved. On the other hand, the magnetic flux in the coils changes synchronously in the vibration process, so that the different ends of the two coils are connected in series to superpose the induced electromotive forces of the coils.
In this embodiment, the two magnetic yokes have positioning force on the magnetic fluid, but the positioning force can not prevent the vibrating particles from breaking the magnetic fluid injection in the circumferential direction as long as the magnetic flow tube is in the axial direction, so that the adverse effect of the positioning magnetic force is eliminated in principle, and the positioning magnetic force is used for attracting the magnetic fluid to automatically repair the closed magnetic circuit.
The size of the magnetic flow tube cavity is an important control parameter, the self-repairing of the closed magnetic circuit is influenced if the size is larger, and the vibration is inhibited if the size is smaller. In addition to the size of the cavity itself, the vibrating pellet loading can also adjust the size and effectiveness of the cavity. In addition, the viscosity coefficient of the magnetic fluid itself will also affect the speed of the closed magnetic circuit breaking and self-repairing.
The embodiments described in this specification are merely illustrative of implementations of the inventive concepts, which are intended for purposes of illustration only. The scope of the present invention should not be construed as being limited to the particular forms set forth in the examples, but rather as being defined by the claims and the equivalents thereof which can occur to those skilled in the art upon consideration of the present inventive concept.
Claims (2)
1. A cut-off type electromagnetic vibration generating set is characterized by comprising a permanent magnet, magnet yokes, induction coils, magnetic flow tubes, magnetic fluids and vibrating particles, wherein the permanent magnet is made of hard magnetic materials, the left side of the permanent magnet is provided with an N pole, the right side of the permanent magnet is provided with an S pole, two identical magnet yokes are respectively connected to two poles of the permanent magnet and respectively become a left magnet yoke and a right magnet yoke, each magnet yoke is made of soft magnetic materials with good magnetic conductivity, a shallow blind hole is formed in each magnet yoke and used for placing the permanent magnet, a shaft for winding the induction coils is arranged on each magnet yoke, and each shaft is provided with a mounting short shaft for mounting the magnetic flow tubes; the magnetic flow tube is made of non-magnetic materials, mounting holes are formed in two ends of the magnetic flow tube and are mounted on mounting short shafts of the two magnetic yokes, a cavity is formed in the middle of the magnetic flow tube, magnetic fluid capable of conducting magnetic is arranged in the cavity of the magnetic flow tube, and a plurality of vibrating particles are arranged in the cavity of the magnetic flow tube and are all made of non-magnetic materials.
2. The truncated electromagnetic vibration power generation device according to claim 1, wherein the vibrating particles are balls made of aluminum or nonmagnetic stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011239946.5A CN112491239B (en) | 2020-11-09 | 2020-11-09 | Cut-off type electromagnetic vibration power generation device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011239946.5A CN112491239B (en) | 2020-11-09 | 2020-11-09 | Cut-off type electromagnetic vibration power generation device |
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| CN112491239B true CN112491239B (en) | 2022-01-11 |
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| US6982501B1 (en) * | 2003-05-19 | 2006-01-03 | Materials Modification, Inc. | Magnetic fluid power generator device and method for generating power |
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| CN110017396A (en) * | 2019-05-22 | 2019-07-16 | 杭州沃凌的机电有限公司 | A kind of magnet fluid sealing valve |
| CN110336450A (en) * | 2019-07-02 | 2019-10-15 | 三峡大学 | Hydromagnetic generating device and its manufacturing method |
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| US20130076158A1 (en) * | 2011-09-25 | 2013-03-28 | Susan MOTISSE | Magnetic Fluid Power Generator Device |
| KR101301945B1 (en) * | 2012-05-04 | 2013-08-30 | 한국철도기술연구원 | Alignment control apparatus of magnetic particles |
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2020
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|---|---|---|---|---|
| US6982501B1 (en) * | 2003-05-19 | 2006-01-03 | Materials Modification, Inc. | Magnetic fluid power generator device and method for generating power |
| CN103095096A (en) * | 2011-11-04 | 2013-05-08 | 罗才德 | Magneto-hydrodynamic power generation technology |
| CN104467357A (en) * | 2013-09-15 | 2015-03-25 | 波音公司 | Ferrofluid motor |
| CN104485797A (en) * | 2014-09-18 | 2015-04-01 | 清华大学 | Magnetic particle flow power generation system having no rotary movement |
| WO2018048238A1 (en) * | 2016-09-09 | 2018-03-15 | 경북대학교 산학협력단 | High-efficiency continuous power generation cycle apparatus using magnetic fluid in which permanent magnets and coils of power generating unit are arranged in series |
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| CN110336450A (en) * | 2019-07-02 | 2019-10-15 | 三峡大学 | Hydromagnetic generating device and its manufacturing method |
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| CN112491239A (en) | 2021-03-12 |
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Effective date of registration: 20231121 Address after: 518000 909, Building 49, No. 3, Queshan Yunfeng Road, Taoyuan Community, Dalang Street, Longhua District, Shenzhen, Guangdong Patentee after: Shenzhen Morning Intellectual Property Operations Co.,Ltd. Address before: 279 Shiqiao Road, Xiacheng District, Hangzhou, Zhejiang 310000 Patentee before: HANGZHOU ZHONGYI AUTOMATION EQUIPMENT Co.,Ltd. Effective date of registration: 20231121 Address after: 279 Shiqiao Road, Xiacheng District, Hangzhou, Zhejiang 310000 Patentee after: HANGZHOU ZHONGYI AUTOMATION EQUIPMENT Co.,Ltd. Address before: The city Zhaohui six districts Chao Wang Road Hangzhou City, Zhejiang province 310014 18 Patentee before: JIANG University OF TECHNOLOGY |