CN113708592A - Permanent-magnet self-suspension type magnetic liquid kinetic energy collector - Google Patents
Permanent-magnet self-suspension type magnetic liquid kinetic energy collector Download PDFInfo
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- CN113708592A CN113708592A CN202110953992.XA CN202110953992A CN113708592A CN 113708592 A CN113708592 A CN 113708592A CN 202110953992 A CN202110953992 A CN 202110953992A CN 113708592 A CN113708592 A CN 113708592A
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- magnetic liquid
- kinetic energy
- permanent magnet
- energy collector
- mass block
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- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/34—Reciprocating, oscillating or vibrating parts of the magnetic circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/22—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors consisting of hollow conductors
Abstract
The invention discloses a permanent magnet self-suspension type magnetic liquid kinetic energy collector, which comprises a shell with a sealing cavity arranged therein and a mass block positioned in the sealing cavity, wherein magnetic liquid is arranged in the sealing cavity, and the mass block is suspended in the sealing cavity through the magnetic liquid; the sealed cavity is two opposite inner end walls along a first direction, and the cross section area of the inner side wall between the two inner end walls in a second direction is alternately increased and decreased along the first direction; the casing is two relative outer end walls along first direction, is provided with flat coil on the outer end wall, and the lateral wall between two outer end walls has cup jointed hollow coil. The invention adopts the magnetic liquid suspended mass block to realize lubrication and resistance reduction, utilizes the inner side wall and the inner end wall to form the magnetic liquid spring with variable rigidity coefficient by matching with the magnetic liquid to provide the restoring force of the mass block in the vibration direction, adopts the hollow coil and the flat coil to jointly acquire the kinetic energy of the mass block, and improves the output power of the kinetic magnetic liquid kinetic energy collector in unit volume.
Description
Technical Field
The invention relates to the technical field of kinetic energy collection, in particular to a permanent magnet self-suspension type magnetic liquid kinetic energy collector.
Background
The rapid development of portable wearable electronic devices brings challenges to power supply, and the search for sustainable clean energy has a very important meaning for providing power for portable wearable electronic devices. The kinetic energy collector is used for converting the cleaning kinetic energy generated by the motion of the human body into electric energy, and is very suitable for portable wearable electronic devices.
The electromagnetic kinetic energy collector converts the kinetic energy of a moving object into electric energy through the law of electromagnetic induction, has the outstanding advantages of low impedance, high output power, high reliability, long service life and the like, and has wide application prospect.
For a common electromagnetic kinetic energy collector, the output power and the service life of the kinetic energy collector can be reduced due to the friction and the abrasion between a moving permanent magnet and a kinetic energy collector shell, and the kinetic energy collecting efficiency of the kinetic energy collector under a micro-vibration condition is seriously influenced. In addition, the electromagnetic kinetic energy collector has a large volume, so that the output power of the kinetic energy collector in unit volume is small.
The specification of publication No. CN111490703A discloses an electromagnetic composite vibrational energy harvester, which includes: the piezoelectric vibrating table comprises a base layer, a permanent magnet assembly, a piezoelectric layer and a support frame arranged on the base vibrating table; the base layer is of an arc arch ring structure, and two ends of the base layer are detachably mounted on two opposite inner side walls of the supporting frame through torsion springs. Because the base layer is detachably arranged on the supporting frame through the torsion springs, different constraint states of the arch ring can be realized by replacing the torsion springs with different rigidity, and the purpose of adjusting the natural frequency of the arch ring structure is achieved.
The specification with publication number CN104065180A discloses a spherical Halbach omnibearing kinetic energy collector, which comprises a shell with a spherical cavity inside, a mass ball with a mass center deviating from the center of the sphere, a plurality of permanent magnets with different magnetization directions and a plurality of coil windings. The coil winding is arranged on the spherical surface of the inner cavity of the shell with the spherical cavity inside, the permanent magnets are arranged on the surface of the mass sphere, the permanent magnets on the spherical surface are arranged according to a Halbach permanent magnet array, and the coil winding in the inner cavity of the shell is arranged at the position where the magnetic lines of force of the Halbach permanent magnet array directly face the spherical surface and vertically enter and exit the spherical surface or the position where the magnetic lines of force are parallel to the spherical surface. The friction existing between the moving mass ball and the shell in the invention can reduce the output power and the service life of the kinetic energy collector.
Disclosure of Invention
The invention aims to provide a permanent magnet self-suspension type magnetic liquid kinetic energy collector which is high in unit volume output power and suitable for collecting kinetic energy under a micro-vibration working condition.
A permanent-magnet self-suspension type magnetic liquid kinetic energy collector comprises: the mass block comprises a permanent magnet, magnetic liquid is arranged in the sealing cavity, and the mass block is suspended in the sealing cavity through the magnetic liquid;
the sealed cavity is two opposite inner end walls along a first direction, and the cross section area of the inner side wall between the two inner end walls in a second direction is alternately increased and decreased along the first direction;
the casing is relative two outer end walls along first direction, and the lateral wall between two outer end walls has cup jointed hollow coil, the outer end wall is provided with flat coil.
The second direction is perpendicular to the first direction and faces the inner side wall.
When the permanent magnet self-suspension type magnetic liquid kinetic energy collector is in a vibration state, the mass block generates displacement in the sealing cavity, namely the mass block and the shell generate relative motion; in the process, the permanent magnet in the mass block enables the flux linkage through which the hollow coil and the flat coil pass to change, and induced electromotive force is generated, so that the effects of collecting kinetic energy and converting the kinetic energy into electric energy are achieved. The permanent magnet self-suspension type magnetic liquid kinetic energy collector forms a magnetic liquid spring with variable stiffness coefficient by matching magnetic liquid with inner side walls with two sealed ends through inner end walls with the cross section area in a sealed cavity increased and reduced alternately along a first direction, the inner side walls and the inner end walls of the sealed cavity provide restoring force to a mass block in a vibration direction (namely the first direction) through the magnetic liquid, a hollow coil and a flat coil collect kinetic energy of the mass block together, the magnetic liquid suspension mass block realizes lubrication and resistance reduction, and the output power of the kinetic energy collector in unit volume under the micro-vibration working condition is improved remarkably.
The mass block comprises permanent magnets and connecting pieces, the permanent magnets are arranged at intervals in the first direction, the connecting pieces are fixed between every two adjacent permanent magnets, and the section size of each connecting piece in the second direction is smaller than that of each permanent magnet in the second direction. The total mass of the mass block can be changed by changing the size and the material of the connecting piece, the output power of the kinetic energy collector can be regulated and controlled, the section size of the connecting piece is smaller than that of the permanent magnet, the inner side wall can be prevented from being in direct contact with the connecting piece, and the frictional resistance of the mass block during reciprocating motion is reduced.
The connecting piece is made of a non-magnetic conductive material or a magnetic conductive material; when the connecting piece is made of a magnetic conductive material, the permanent magnets arranged on the two sides of the connecting piece are different in magnetization direction. When the material of the connecting piece is a non-magnetic conducting material, the connecting piece does not influence the magnetic field of the space around the mass block; when the connecting piece is made of a magnetic conductive material, if the magnetization directions of the permanent magnets at two ends of the connecting piece are the same, the connecting piece connects the adjacent permanent magnets in series to form a combined large permanent magnet, the reciprocating motion of the mass block enables the magnetic flux change rate of the hollow coil to be reduced, the generated voltage is reduced, and the output power of the permanent magnet self-suspension type magnetic liquid kinetic energy collector is reduced. Therefore, when the connecting piece is made of a magnetic conductive material, the permanent magnets on the two sides of the connecting piece need to ensure different magnetization directions.
The permanent magnet and the connecting piece are respectively provided with a permanent magnet through hole and a connecting piece first through hole along a first direction, the permanent magnet through hole is communicated with the connecting piece first through hole, and the connecting piece is also provided with a connecting piece second through hole communicated with the connecting piece first through hole. When the magnetic liquid and the mass block are positioned in the sealing cavity, the magnetic liquid can be adsorbed on the surface of the mass block, the sealing cavity is limited into a plurality of relatively independent sealing spaces, and the through holes are connected with the independent sealing spaces to prevent the mass block from moving and blocking due to air pressure.
Preferably, the inner side wall of the sealed cavity is composed of a plurality of contraction conical surfaces and diffusion conical surfaces which are alternately arranged along the first direction, and the sum of the number of the contraction conical surfaces and the number of the diffusion conical surfaces is even. When the mass block vibrates, the offset of the mass block is different according to different vibration intensities, and the shrinkage conical surface and the diffusion conical surface which are alternately distributed and the two inner end walls which are opposite in the first direction can provide restoring force with different magnitudes for the mass block through the magnetic liquid.
The outer side wall of the shell is provided with a wire slot, an air coil and a positioning ring are connected in the wire slot, the positioning ring is close to the bottom of the wire slot, and two side walls of the wire slot are respectively abutted against the air coil or the positioning ring; the flat coil is fixed to two outer end walls opposed in the first direction. The air core coil and the positioning ring are arranged in the wire slot, and the flat coil is fixed on the outer end wall, so that the air core coil and the flat coil are prevented from sliding due to vibration.
Preferably, the sealed cavity at least partially extends into the hollow coil in the first direction, so that when the mass block reciprocates in the sealed cavity, the mass block penetrates through the hollow coil along the first direction, the flux linkage change of the hollow coil is increased, the induction voltage is increased, and the output power of the permanent magnet self-suspension type magnetic liquid kinetic energy collector is improved.
The positioning ring is provided with a positioning block, the positioning block is provided with a positioning through hole along a first direction, and the positioning through hole is used for fixing the kinetic energy collector and an external working environment, so that the permanent magnet self-suspension type magnetic liquid kinetic energy collector collects kinetic energy of the external environment.
The shell, the hollow coil, the positioning ring and the flat coil are all made of non-magnetic-conducting materials. The magnetic force action does not exist between the non-magnetic material and the mass block, so that the shell, the hollow coil, the positioning ring and the flat coil which are made of the non-magnetic material cannot block the reciprocating motion of the mass block, and the reciprocating motion of the mass block enables the magnetic linkage of the hollow coil and the flat coil to change, thereby generating induced voltage; therefore, the shell, the hollow coil, the positioning ring and the flat coil adopt non-magnetic-conducting materials, which is beneficial to improving the output power of the permanent-magnet self-suspension type magnetic liquid kinetic energy collector.
The casing includes the cavity section of thick bamboo, and cavity section of thick bamboo has at least one end to be equipped with the end cover, the end cover opening forms sealedly through the end cap stopper. The end cover plug and the end cover are movably connected, so that the magnetic liquid can be injected or extracted, the suspension force borne by the mass block is changed by changing the mass of the magnetic liquid, and the rigidity and the damping of the permanent magnet self-suspension type magnetic liquid kinetic energy collector can be effectively regulated and controlled.
Compared with the prior art, the invention has the advantages that:
1. the invention realizes lubrication and resistance reduction by using the magnetic liquid suspension mass block, and adopts the hollow coil and the flat coil to collect the kinetic energy of the mass block together, thereby improving the output power of the permanent magnet self-suspension type magnetic liquid kinetic energy collector.
2. The invention utilizes the inner side wall with the cross section area alternately increased and reduced along the first direction in the second direction and the inner end wall with two sealed ends to form the magnetic liquid spring with variable rigidity coefficient by matching with the magnetic liquid, provides the restoring force of the mass block in the vibration direction, does not need additional springs, reduces the volume of the permanent magnetic self-suspension type magnetic liquid kinetic energy collector, and enables the permanent magnetic self-suspension type magnetic liquid kinetic energy collector to adapt to the vibration with different strengths.
Drawings
Fig. 1 is a schematic structural diagram of a permanent magnet self-suspension type magnetic liquid kinetic energy collector in the embodiment of the invention.
Fig. 2 is a schematic structural view of the mass shown in fig. 1.
Fig. 3 is a schematic structural view of the housing shown in fig. 1.
Reference numerals: the magnetic coupling structure comprises a sealed cavity 1, a shell 2, a mass block 3, magnetic liquid 4, a hollow coil 5, a positioning ring 6, a flat coil 7, an outer end wall 201, an outer side wall 202, a permanent magnet 31, a connecting piece 32, a first permanent magnet 311, a second permanent magnet 312, a permanent magnet through hole 301, a connecting piece first through hole 302, a connecting piece second through hole 303, a radial positioning block 304, a hollow cylinder 21, an end cover plug 22, an end cover 23, an inner end wall 11, a first inner end wall 111, a second inner end wall 112, an inner side wall 12, a positioning block 61 and a positioning through hole 601.
Detailed Description
As shown in fig. 1-3, the permanent magnet self-suspension type magnetic liquid kinetic energy collector includes: the device comprises a shell 2 internally provided with a sealed cavity 1 and a mass block 3 positioned in the sealed cavity 1, wherein the mass block 3 comprises a permanent magnet, magnetic liquid 4 which is not filled in the sealed cavity 1 is arranged between the mass block 3 and the shell 2, and the mass block 3 is suspended in the sealed cavity 1 through the magnetic liquid 4. The magnetic liquid 4 suspends the mass block 3, so that the mass block 3 and the shell 2 can be prevented from being in direct contact, and lubrication and drag reduction are realized.
The shell 2 is provided with two outer end walls 201 which are parallel to each other along a first direction, and the flat coil 7 is fixed on the outer end walls 201; an outer side wall 202 is arranged between the two outer end walls 201, and the outer side wall 202 is alternately sleeved with the hollow coil 5 and the positioning ring 6. The flat coil 7 and the hollow coil 5 are adopted to collect the kinetic energy of the mass block 3 together, so that the kinetic energy collection efficiency can be improved, and the output power of the permanent magnet self-suspension type magnetic liquid kinetic energy collector is improved.
As shown in fig. 2, the mass block 3 includes a connecting member 32 and a permanent magnet 31, the permanent magnet 31 includes a first permanent magnet 311 and a first permanent magnet 312 that are respectively fixed to two ends of the connecting member 32 along a first direction, the connecting member 32 and the permanent magnet 31 are both in a cylindrical structure, the first permanent magnet 311 and the second permanent magnet 312 have the same shape and size, and the cross-sectional size of the connecting member 32 in the second direction is smaller than the cross-sectional size of the first permanent magnet 311 and the second permanent magnet 312 in the second direction.
The permanent magnet 31 and the connecting piece 32 are fixed by means of gluing.
First permanent magnet 311 and second permanent magnet 312 all are equipped with along the permanent magnet through-hole 301 of first direction, and connecting piece 32 is equipped with the first through-hole 302 of the coaxial connecting piece of permanent magnet through-hole 301, and connecting piece 32 has still set up the connecting piece second through-hole 303 that is linked together with the first through-hole 302 of connecting piece. When the magnetic liquid 4 and the mass block 3 are arranged in the sealed cavity 1, the magnetic liquid 4 is adsorbed on the surface of the mass block 3, the sealed cavity 1 is limited into a plurality of relatively independent sealed spaces, and the through holes are connected with the independent sealed spaces, so that the mass block 3 is prevented from moving and blocking due to air pressure.
The outer wall of the connecting member 32 is provided with a radial positioning block 304. The permanent magnet 31 is sleeved on the outer wall of the connecting piece 32 to the radial positioning block 304 through the permanent magnet through hole 301, and the radial positioning block 304 is adopted to improve the assembling quality and efficiency of the mass block 3.
When the material of the connecting member 32 is a non-magnetic material, the first permanent magnet 311 and the second permanent magnet 312 are made of neodymium iron boron material and are magnetized in the axial direction. The non-magnetic material adopted by the connecting piece 32 comprises a metal material and a non-metal material; the non-metal material can be polyformaldehyde, nylon, resin and the like, and the metal material can be aluminum, copper, alloys thereof and the like. When the material of the connecting member 32 is a non-magnetic material, the connecting member 32 does not affect the magnetic field in the space around the mass block 3, and therefore, the magnetization directions of the first permanent magnet 311 and the second permanent magnet 312 may be the same or opposite.
When the material of the connecting member 32 is a magnetic conductive material, the magnetization directions of the first permanent magnet 311 and the second permanent magnet 312 are different. Because the connecting piece 32 connects the first permanent magnet 311 and the second permanent magnet 312 in series to form a combined large permanent magnet when the magnetization directions of the first permanent magnet 311 and the second permanent magnet 312 are the same, the reciprocating motion of the mass block 3 reduces the change rate of the magnetic flux of the hollow coil 5, the generated voltage is reduced, and the output power of the permanent magnet self-suspension type magnetic liquid kinetic energy collector is reduced. Therefore, when the material of the connecting member 22 is a magnetic conductive material, it is necessary to ensure that the magnetization directions are opposite when the adjacent permanent magnets 31 are installed.
By changing the size and material of the connecting piece 32, the total mass of the mass block 3 can be changed, and the output power of the kinetic energy harvester can be regulated.
As shown in fig. 3, the housing 2 comprises a hollow cylinder 21, one end of the hollow cylinder 21 is provided with an end cap 23, which is provided with an opening, and a seal is formed by an end cap plug 22. The end cover plug 22 and the end cover 23 are connected by screw threads; the plug body of the end cap plug 22 is screwed into the inner wall of the end cap 23 to form a plane with the inner wall of the end cap 23.
The hollow cylinder 21 is movably connected with the end cover 23, and the end cover 23 is detachable, so that the assembly and the positioning of the hollow coil 5 and the positioning ring 6 are facilitated; the end cover 23 of the end cover plug 22 is movably connected to facilitate the injection or extraction of the magnetic liquid 4, when the magnetic liquid 4 needs to be injected or extracted, the end cover plug 22 is opened to inject or extract the magnetic liquid 4, and the suspension force borne by the mass block 3 is changed by changing the mass of the magnetic liquid 4, so that the rigidity and the damping of the permanent magnet self-suspension type magnetic liquid kinetic energy collector are effectively regulated and controlled.
The sealed cavity 1 is provided with two inner end walls 11 which are parallel to each other along a first direction, each inner end wall 11 comprises a first inner end wall 111 and a second inner end wall 112, the first inner end wall 111 is a plane formed by the inner walls of the end cover plug 22 and the end cover 23, the second inner end wall 112 is the bottom of the hollow cylinder 21, and the inner side wall 12 between the first inner end wall 111 and the second inner end wall 112 is formed by alternately forming a contraction conical surface and a diffusion conical surface along the first direction.
The inner wall of the sealed cavity 1 is matched with the magnetic liquid 4 to form a magnetic liquid spring with variable rigidity coefficient, so that the restoring force of the mass block 3 in the vibration direction is provided, and the spring does not need to be additionally installed, so that the volume of the kinetic energy collector is reduced, and the kinetic energy collector is suitable for the vibration with different strengths; meanwhile, the sealed cavity 1 prevents the magnetic liquid 4 from volatilizing or overflowing, reduces the loss of the magnetic liquid 4, and prolongs the service life of the permanent magnet self-suspension type magnetic liquid kinetic energy collector.
The restoring force refers to a force acting on the mass block 3 and directed toward the center position when the mass block 3 is deviated from the center position.
The outer side wall 202 of the hollow cylinder 21 is provided with a slot, and the slot is matched with the end face of the end cover 23 to form a wire slot; three hollow coil 5 and two holding rings 6 cup joint in the wire casing in turn, and the tank bottom of wire casing offsets with the inner wall of holding ring 6, and the both sides wall of wire casing offsets with the hollow coil 5 at both ends respectively, makes hollow coil 5 be fixed in the lateral wall 202 of casing 2 through holding ring 6. The hollow coil 5 and the positioning ring 6 are arranged in the wire slot, so that the sliding of the hollow coil 5 and the positioning ring 6 caused by vibration is prevented.
The three hollow coils 5 are correspondingly sleeved outside the sealed cavity 1 in the second direction. When the mass block 3 reciprocates in the sealed cavity 1, the mass block 3 penetrates through the hollow coil 5 along the first direction, and the flux linkage change of the hollow coil 5 is increased, so that the induction voltage is increased, and the output power of the kinetic energy collector is improved.
The flat coil 7 is fixed to the end surface of the end cap 23 and the hollow cylinder 21 by means of gluing or screwing.
The center axes of the air-core coil 5 and the flat coil 7 coincide with the center axis of the case 2.
The two positioning rings 6 are provided with positioning blocks 61, the positioning blocks 61 are provided with positioning through holes 601 along the first direction, the positioning through holes 601 of the two positioning rings 6 are the same in shape and size, and the centers of the positioning through holes are axially overlapped. The positioning through hole 601 is used for fixing the kinetic energy collector with an external working environment.
The shell 2, the hollow coil 5, the positioning ring 6 and the flat coil 7 are all made of non-magnetic conducting materials.
The non-magnetic materials selected for the shell 2 and the positioning ring 6 can be non-metal materials such as polyformaldehyde, nylon, resin and the like, and can also be metal materials such as aluminum, copper and alloys thereof; the materials of the air-core coil 5 and the flat coil 7 are selected from copper. There is no magnetic force between the non-magnetic conductive material and the mass 3, so the case 2, the air core coil 5, the positioning ring 6 and the flat coil 7 made of non-magnetic conductive material do not obstruct the reciprocating motion of the mass 3, and the reciprocating motion of the mass 3 changes the magnetic linkage of the air core coil 5 and the flat coil 7, thereby generating induced voltage.
When the permanent magnet self-suspension type magnetic liquid kinetic energy collector is in a vibration state, the mass block 3 generates displacement in the sealed cavity 1, namely the mass block 3 and the shell 2 generate relative motion; since the relative positions of the air core coil 5 and the flat coil 7 with respect to the housing 2 remain unchanged, the mass 3 moves relative to the air core coil 5 and the flat coil 7. When the kinetic energy collector is in a vibration state, the permanent magnet 31 in the mass block 3 enables the flux linkage through which the hollow coil 5 and the flat coil 7 pass to generate induced electromotive force, so that the effects of collecting kinetic energy and converting the kinetic energy into electric energy are achieved, the kinetic energy of the mass block 3 is collected by the hollow coil 5 and the flat coil 7 together, and the output power of the kinetic energy collector is improved.
When the vibration intensity is small, the eccentric displacement of the mass block 3 in the first direction is small, the magnetic liquid 4 is not in direct contact with the two inner end walls 11 of the sealed cavity 1, the magnetic liquid 4 and the inner side wall 12 of the sealed cavity 1 form a magnetic liquid spring with a small rigidity coefficient, and the restoring force applied to the mass block 3 is small; when the vibration intensity is high, the eccentric displacement of the mass block 3 in the first direction is high, the magnetic liquid 4 and the inner wall of the sealed cavity 1 jointly form a magnetic liquid spring with a high stiffness coefficient, and the restoring force applied to the mass block 3 is high. The magnetic liquid spring with variable stiffness coefficient enables the kinetic energy collector to adapt to the vibration with different strengths.
Claims (10)
1. The utility model provides a permanent magnetism is from floated magnetic fluid kinetic energy collector which characterized in that includes:
the device comprises a shell (2) internally provided with a sealed cavity (1) and a mass block (3) positioned in the sealed cavity (1), wherein the mass block (3) comprises a permanent magnet, magnetic liquid (4) is arranged in the sealed cavity (1), and the mass block (3) is suspended in the sealed cavity (1) through the magnetic liquid (4);
the sealed cavity (1) is provided with two opposite inner end walls (11) along a first direction, and the cross section area of an inner side wall (12) between the two inner end walls (11) in a second direction is alternately increased and decreased along the first direction;
the shell (2) is provided with two opposite outer end walls (201) along a first direction, an outer side wall (202) between the two outer end walls (201) is sleeved with the hollow coil (5), and the outer end walls (201) are provided with the flat coils (7).
2. The permanent magnet self-suspension type magnetic liquid kinetic energy collector as claimed in claim 1, wherein the mass block (3) comprises permanent magnets (31) and connecting pieces (32) which are arranged at intervals along a first direction, the connecting pieces (32) are fixed between two adjacent permanent magnets (31), and the cross-sectional dimension of the connecting pieces (32) in a second direction is smaller than that of the permanent magnets (31) in the second direction.
3. The permanent magnet self-suspension type magnetic liquid kinetic energy collector as claimed in claim 2, wherein when the connecting piece (32) is made of a magnetic conductive material, the magnetization directions of the permanent magnets (31) arranged on the two sides of the connecting piece (32) are different.
4. The permanent magnet self-suspension type magnetic liquid kinetic energy collector as claimed in claim 2, wherein the permanent magnet (31) and the connecting piece (32) are respectively provided with a permanent magnet through hole (301) and a connecting piece first through hole (302) along a first direction, the permanent magnet through hole (301) is communicated with the connecting piece first through hole (302), and the connecting piece (32) is further provided with a connecting piece second through hole (303) communicated with the connecting piece first through hole (302).
5. The permanent magnet self-suspension type magnetic liquid kinetic energy collector as claimed in claim 1, wherein the inner side wall (12) of the sealed cavity (1) is composed of a plurality of contraction conical surfaces and diffusion conical surfaces alternately along the first direction, and the sum of the number of the contraction conical surfaces and the number of the diffusion conical surfaces is an even number.
6. The permanent magnet self-suspension type magnetic liquid kinetic energy collector as claimed in claim 1, wherein a wire slot is formed on the outer side wall (202) of the shell (2), an air core coil (5) and a positioning ring (6) are sleeved in the wire slot, the positioning ring (6) is close to the bottom of the wire slot, two side walls of the wire slot respectively abut against the air core coil (5) or the positioning ring (6), and the flat coil (7) is fixed on the outer end wall (201).
7. The permanent magnet self-suspension type magnetic liquid kinetic energy harvester according to claim 1, wherein the sealed cavity (1) at least partially extends into the hollow coil (5) in the first direction.
8. The permanent magnet self-suspension type magnetic liquid kinetic energy collector as claimed in claim 6, wherein a positioning block (61) is arranged on the positioning ring (6), and the positioning block (61) is provided with a positioning through hole (601) along a first direction.
9. The permanent magnet self-suspension type magnetic liquid kinetic energy collector as claimed in claim 6, wherein the shell (2), the hollow coil (5), the positioning ring (6) and the flat coil (7) are made of non-magnetic conducting materials.
10. The permanent magnet self-suspension type magnetic liquid kinetic energy collector as claimed in claim 1, wherein the shell (2) comprises a hollow cylinder (21), at least one end of the hollow cylinder (21) is provided with an end cover (23), the end cover (23) is opened, and a seal is formed through an end cover plug (22).
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| CN202110953992.XA CN113708592B (en) | 2021-08-19 | 2021-08-19 | Permanent-magnet self-suspension type magnetic liquid kinetic energy collector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114439875A (en) * | 2022-01-14 | 2022-05-06 | 清华大学 | Electric eddy current magnetic liquid damping shock absorber |
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