Permanent magnet type energy recovery shock absorber with torsional self-decoupling characteristic

Abstract

The invention relates to the field of shock absorbers, and particularly discloses a permanent magnet type energy recovery shock absorber with a torsional self-decoupling characteristic, which comprises a shock absorber main body, a machine body shell is arranged on the outer side of the shock absorber main body, and an inertia flywheel is arranged in the shock absorber main body. A multi-stable-state rigidity layer is arranged above the inertia flywheel and located in the shock absorber body, an energy collecting layer is arranged below the inertia flywheel and located in the shock absorber body, and an energy collecting layer is arranged on the inner side of the stator coil and corresponds to the interior of the shock absorber body. The magnetic field on the inner side of the rotor is effectively shielded by utilizing the unique magnetic field single-side gathering characteristic of the alternately polarized high-energy-efficiency single-side magnetism gathering assembly, so that the requirement on heavy rotor back iron is removed, and the inertia amplification principle of the flexible spiral structure is combined; the multistable characteristic introduced by the magnetic negative stiffness enables the system to keep large-amplitude response in a wide frequency band, and the problem that a linear shock absorber is prone to detuning is solved.

Description

Technical Field

[0001] This invention relates to the field of vibration dampers, specifically a permanent magnet energy recovery vibration damper with torsional self-decoupling characteristics. Background Technology

[0002] Dynamic vibration dampers are devices that use a resonant system to absorb the vibrational energy of an object, thereby reducing its vibration. The principle involves adding a mass-spring resonant system to the vibrating object. The reaction force generated by this additional system during resonance reduces the vibration of the object. A dynamic vibration damper is a passive / semi-passive vibration reduction device that fixes an "additional spring-mass-damping system" to the main vibrating structure. Its core idea is to align the natural frequency of the additional system precisely with the most prominent excitation frequency of the main structure, causing the additional mass to generate an inertial force opposite to the vibration of the main structure, thus "absorbing" the energy. The energy is dissipated to reduce the amplitude of the main structure. Dynamic vibration dampers come in two types: undamped (forming a "dynamic vibration absorption valley" only at the tuning frequency with an extremely narrow frequency band) and damped (with appropriate damping, the original single-peak resonance of the main structure can be "split" into two low-amplitude peaks in a wider frequency band, and the resonance amplification factor can be significantly reduced). Traditional dynamic vibration dampers usually rely on a large physical mass to tune the frequency and dissipate energy. "Inertial container" technology and various flexible spiral structures can use the motion conversion mechanism of "small mass and large inertia" to reduce the physical mass requirement.

[0003] However, existing "inertial container" technology dampers convert vertical motion into rotational motion during compression. This strong vertical-torsional coupling effect can exert destructive accompanying torque on precision instruments or main structures, leading to attitude instability. Summary of the Invention

[0004] To address the existing problems, this invention provides a permanent magnet energy recovery vibration damper with torsional self-decoupling characteristics. When used in conjunction with this device, it can effectively solve the problems mentioned in the background art.

[0005] To solve the above problems, the present invention adopts the following technical solution: A permanent magnet energy recovery vibration damper with torsional self-decoupling characteristics includes a damper body, an outer shell of the damper body, an inertial flywheel inside the damper body, a multi-stable stiffness layer above the inertial flywheel inside the damper body, an energy harvesting layer below the inertial flywheel inside the damper body, a rotor side inside the multi-stable stiffness layer, a stator side between the rotor side and the damper body, a first magnetic block array inside the stator side, a second magnetic block array inside the rotor side, stator coils arrayed on the inner wall of the outer shell, an energy harvesting layer inside the stator coils corresponding to the inside of the damper body, an air gap between adjacent stator coils, magnetic flux guiding blocks arrayed inside the energy harvesting layer, and a main magnetomotive force block between adjacent magnetic flux guiding blocks inside the energy harvesting layer.

[0006] As a further embodiment of the present invention: a load interface disk is provided at the upper end of the damper body, and a mounting base is provided at the lower end of the damper body.

[0007] As a further embodiment of the present invention: an upper flexible beam is arrayed on the lower surface of the load interface disk, and a lower flexible beam is arrayed on the upper surface of the mounting base.

[0008] As a further embodiment of the present invention: a coil frame is installed on the inner wall of the outer casing corresponding to the inner side of the stator coil.

[0009] As a further embodiment of the present invention: a drive spindle is installed at the center of the inertial flywheel, and the damper body is fixedly connected to the mounting base.

[0010] As a further aspect of the present invention: the inertial flywheel is a disc-shaped high-strength alloy steel structural component, and the thickness of the middle part of the inertial flywheel is less than the thickness of the rim.

[0011] As a further embodiment of the present invention: the upper flexible beam is interconnected with the load interface disk and the inertial flywheel, and the lower flexible beam is interconnected with the mounting base and the inertial flywheel.

[0012] As a further embodiment of the present invention: the lower flexible beam is inclined to the inertial flywheel, and the upper flexible beam is inclined to the inertial flywheel.

[0013] As a further embodiment of the present invention: the first magnetic block and the second magnetic block are located inside the multi-stable stiffness layer and are arranged with opposite polarities.

[0014] As a further embodiment of the present invention: the coil frame is fixedly connected to the damper body.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. The main body of the shock absorber is composed of a bottom mounting base, an inertia flywheel, a load interface disc, and a housing, forming a stable double-reverse spiral series topology structure, which can have torsional functions with multi-steady-state and energy recovery capabilities.

[0016] 2. This application eliminates the risk of torsional damage to the main system caused by traditional helical structures, ensuring the attitude stability of the object being damped. By utilizing the unique one-sided magnetic field concentration characteristics of the high-efficiency single-sided magnetic focusing component with alternating polarization, the magnetic field inside the rotor is effectively shielded, thereby eliminating the need for a heavy rotor back iron. Combined with the inertial amplification principle of the flexible helical structure, a lightweight design is achieved with an extremely high energy efficiency ratio. The multi-stable characteristics introduced by the magnetic negative stiffness enable the system to maintain a large amplitude response over a wide frequency band, solving the problem of detuning in linear dampers.

[0017] 3. The alternating polarization of the flux guiding block and the main magnetomotive force block forms a permanent magnet with a high-efficiency single-sided magnetic focusing component arrangement. This arrangement, by combining magnetic blocks with different magnetization directions, can effectively concentrate the magnetic field lines on one side and point them toward the air gap side of the stator. The upper flexible beam set below the load interface disk forms a flexible spiral structure with an inertial amplification effect. It can convert the small vertical vibration velocity applied from the load interface disk into the tangential rotational linear velocity of the inertial flywheel, so that the stator coil can cut the magnetic field lines at an extremely high rate, thereby generating high voltage output even under low-frequency excitation.

[0018] 4. When the load interface disc above the main body of the vibration damper is subjected to vertical excitation, the inertial flywheel in the middle is forced to rotate at high speed to accumulate kinetic energy. The reverse rotation trend of the load interface disc relative to the inertial flywheel in the middle is precisely canceled out by the absolute rotation of the inertial flywheel itself, thereby ensuring that the load interface disc only produces pure vertical translation relative to the mounting base, realizing wide-frequency vibration absorption and efficient power generation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a permanent magnet energy recovery vibration damper with torsional self-decoupling characteristics. Figure 2 This is a cross-sectional view of the main body of a permanent magnet energy recovery vibration damper with torsional self-decoupling characteristics. Figure 3 This is a cross-sectional view of the energy harvesting layer in a permanent magnet energy recovery vibration damper with torsional self-decoupling characteristics. Figure 4This is a cross-sectional view of a multi-steady-state stiffness layer in a permanent magnet energy recovery damper with torsional self-decoupling characteristics.

[0020] In the diagram: 1. Vibration damper body; 2. Housing; 3. Load interface disc; 4. Mounting base; 5. Inertia flywheel; 6. Multi-steady-state stiffness layer; 7. Energy harvesting layer; 8. Coil frame; 9. Stator coil; 10. Upper flexible beam; 11. Lower flexible beam; 601. Stator side; 602. Rotor side; 603. First magnetic block; 604. Second magnetic block; 701. Flux guide block; 702. Main magnetomotive force block; 703. Air gap. Detailed Implementation

[0021] The present invention will be further described below with reference to specific inventions. The technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0022] In the description of this specification, references to terms such as "this embodiment," "some embodiments," "example," "specific example," or "some examples" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example, and the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0023] like Figure 1-4As shown, this embodiment provides a permanent magnet energy recovery vibration damper with torsional self-decoupling characteristics, including a damper body 1, an outer shell 2 on the outside of the damper body 1, an inertial flywheel 5 inside the damper body 1, a drive shaft mounted at the center of the inertial flywheel 5, the inertial flywheel 5 being a disc-shaped high-strength alloy steel structural component, and the thickness of the middle part of the inertial flywheel 5 being less than the thickness of the rim, a multi-stable stiffness layer 6 being disposed above the inertial flywheel 5 inside the damper body 1, and a multi-stable stiffness layer 6 being disposed below the inertial flywheel 5 inside the damper body 1. An energy harvesting layer 7 is internally arranged. A rotor side 602 is located inside the multi-stable stiffness layer 6. A stator side 601 is located between the rotor side 602 and the damper body 1. A first magnetic block 603 is arrayed inside the stator side 601, and a second magnetic block 604 is arrayed inside the rotor side 602. The first magnetic block 603 and the second magnetic block 604 are located inside the multi-stable stiffness layer 6 and are arranged with opposite polarities. A stator coil 9 is arrayed on the inner wall of the outer shell 2. The energy harvesting layer 7 is located inside the stator coil 9 corresponding to the interior of the damper body 1. The device employs a double-reverse spiral series topology. The lower flexible beam 11 connects the mounting base 4 to the central inertial flywheel 5, exhibiting a first rotational inclination angle. The upper flexible beam 10 connects the load interface disk 3 to the central inertial flywheel 5. Therefore, the energy harvesting layer 7 and the multistable stiffness layer 6 both have opposite second rotational inclination angles. The geometrically complementary design of the multistable stiffness layer 6 and the energy harvesting layer 7 ensures that when the load interface disk 3 above the damper body 1 is subjected to vertical excitation, the central inertial flywheel 5 is forced to rotate at high speed to accumulate kinetic energy, while the load... The reverse rotational tendency of the interface disk 3 relative to the central inertial flywheel 5 is precisely canceled out numerically by the absolute rotational motion of the inertial flywheel 5 itself, thereby ensuring that the load interface disk 3 only produces pure vertical translation relative to the mounting base 4, achieving the purpose of "zero torque" output. In order to achieve wide-frequency vibration absorption and high-efficiency power generation, an air gap 703 is provided between two adjacent stator coils 9, and a magnetic flux guiding block 701 is arranged in the internal array of the energy collection layer 7. A main magnetic potential block 702 is arranged between two adjacent magnetic flux guiding blocks 701 inside the energy collection layer 7.

[0024] like Figure 2-4As shown, in this embodiment, a load interface disk 3 is provided at the upper end of the damper body 1, and a mounting base 4 is provided at the lower end of the damper body 1. The damper body 1 is fixedly connected to the mounting base 4. An upper flexible beam 10 is arrayed on the lower surface of the load interface disk 3. The upper flexible beam 10 is interconnected with the load interface disk 3 and the inertia flywheel 5. A lower flexible beam 11 is arrayed on the upper surface of the mounting base 4. The lower flexible beam 11 is interconnected with the mounting base 4 and the inertia flywheel 5. The lower flexible beam 11 and the inertia flywheel 5 are inclined. The upper flexible beam 10 and the inertia flywheel 5 are also inclined. A coil frame 8 is installed on the inner wall of the outer shell 2, corresponding to the inner side of the stator coil 9. The coil frame 8 is fixedly connected to the damper body 1. A radially layered electromagnetic interaction system multistable stiffness layer 6 and energy harvesting layer 7 are constructed between the outer circumferential surface of the inertial flywheel 5 in the middle of the device and the inner wall of the outer shell 2. In the multistable stiffness layer 6 in the upper region of the inertial flywheel 5 and the outer shell 2, the correspondingly arranged first magnetic block 603 and second magnetic block 604 constitute a permanent magnet array with the same polarity. The magnets generate the maximum radial repulsive force at the equilibrium position, thereby introducing a negative stiffness effect, making the system... The system possesses bistable or multistable nonlinear dynamic characteristics, enabling the device to undergo large-amplitude inter-well jumps over a wide frequency range, significantly improving low-frequency vibration absorption performance. In the energy harvesting layer 7, located in the lower region of the inertial flywheel 5 and the inner wall of the outer casing 2, the alternating polarization of the magnetic flux guiding block 701 and the main magnetic potential block 702 on the rotor side inside the energy harvesting layer 7 forms a permanent magnet with a high-efficiency single-sided magnetic focusing component arrangement. This arrangement, by combining magnetic blocks with different magnetization directions, can effectively concentrate the magnetic field lines on one side towards the air gap 703 of the stator, establishing a magnetic field without the need for a back iron. The high-intensity sinusoidal magnetic field, thanks to the flexible spiral structure formed by the upper flexible beam 10 below the load interface disk 3, has an inertial amplification effect. It can convert the small vertical vibration velocity applied from the load interface disk 3 into the tangential rotational linear velocity of the inertial flywheel 5. Combined with the high energy efficiency of the single-sided magnetic flux gathering group of the alternating polarized magnetic flux guide block 701 and the main magnetic potential block 702, the high air gap 703 magnetic flux density is generated, which enables the stator coil 9 to cut the magnetic field lines at an extremely high rate. Thus, high voltage output can be generated even under low-frequency excitation, realizing efficient recovery of vibration energy and controllable adjustment of electromagnetic damping.

[0025] The working principle of this invention is as follows: the tilt angle formed between the upper flexible beam 10 below the load interface disk 3 and the inertia flywheel 5, combined with the tilt angle formed between the lower flexible beam 11 above the mounting base 4 and the inertia flywheel 5, constitutes a double-reverse spiral series topology. When the load interface disk 3 is subjected to a vertically downward force directly above it, the load interface disk 3 is vertically excited, and the middle inertia flywheel 5 is forced to rotate at high speed to accumulate kinetic energy. The load interface disk 3 rotates in the opposite direction to the middle inertia flywheel 5. The trend and the absolute rotational motion of the inertial flywheel 5 are precisely canceled out numerically, thus ensuring that the load interface disk 3 only produces pure vertical translation relative to the mounting base 4. A radially layered electromagnetic interaction system, a multistable stiffness layer 6 and an energy harvesting layer 7, are constructed between the outer circumference of the inertial flywheel 5 and the inner wall of the outer shell 2. In the multistable stiffness layer 6 in the upper region of the inertial flywheel 5 and the outer shell 2, the magnet generates the maximum radial repulsive force at the equilibrium position, introducing a negative stiffness effect, which makes the system bistable. The nonlinear dynamic characteristics of multiple steady states cause the device to undergo large-amplitude inter-well jumps over a wide frequency range, significantly improving its low-frequency vibration absorption performance. In the energy harvesting layer 7, located in the lower region of the inertial flywheel 5 and the inner wall of the outer shell 2, the magnetic flux guiding block 701 and the main magnetic potential block 702 on the rotor side inside the energy harvesting layer 7 are alternately polarized, forming a permanent magnet with a high-efficiency single-sided magnetic focusing component arrangement. This arrangement, by combining magnetic blocks with different magnetization directions, can effectively concentrate the magnetic field lines on one side. On one side of the stator's air gap 703, a high-intensity sinusoidal magnetic field can be established without a back iron. The tiny vertical vibration velocity applied from the load interface disk 3 is converted into the tangential rotational linear velocity of the inertial flywheel 5. Combined with the high-efficiency single-sided magnetic flux density generated by the alternating polarized magnetic flux guide block 701 and the main magnetomotive force block 702, the stator coil 9 can cut magnetic field lines at an extremely high rate, thereby generating high voltage output even under low-frequency excitation, achieving efficient recovery of vibration energy and controllable adjustment of electromagnetic damping.

[0026] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A permanent magnet energy recovery vibration damper with torsional self-decoupling characteristics, comprising a damper body (1), characterized in that, An organic shell (2) is provided on the outside of the vibration damper body (1). An inertial flywheel (5) is provided inside the vibration damper body (1). A multi-stable stiffness layer (6) is provided above the inertial flywheel (5) inside the vibration damper body (1). An energy harvesting layer (7) is provided below the inertial flywheel (5) inside the vibration damper body (1). A rotor side (602) is provided inside the multi-stable stiffness layer (6). A stator side (601) is provided between the rotor side (602) and the vibration damper body (1). An array of components is arranged inside the stator side (601). There is a first magnetic block (603), and a second magnetic block (604) is arranged in an array inside the rotor side (602). A stator coil (9) is arranged in an array on the inner wall of the outer shell (2). An energy collection layer (7) is arranged inside the stator coil (9) corresponding to the inside of the damper body (1). An air gap (703) is arranged between two adjacent stator coils (9). A magnetic flux guiding block (701) is arranged in an array inside the energy collection layer (7). A main magnetic potential block (702) is arranged between two adjacent magnetic flux guiding blocks (701) inside the energy collection layer (7).

2. A permanent magnet energy recovery vibration damper with torsional self-decoupling characteristics according to claim 1, characterized in that, The upper end of the damper body (1) is provided with a load interface disk (3), and the lower end of the damper body (1) is provided with a mounting base (4).

3. A permanent magnet energy recovery vibration damper with torsional self-decoupling characteristics according to claim 2, characterized in that, The lower surface of the load interface disk (3) is arrayed with upper flexible beams (10), and the upper surface of the mounting base (4) is arrayed with lower flexible beams (11).

4. A permanent magnet energy recovery vibration damper with torsional self-decoupling characteristics according to claim 1, characterized in that, The inner wall of the outer casing (2) is fitted with a coil frame (8) corresponding to the inner side of the stator coil (9).

5. A permanent magnet energy recovery vibration damper with torsional self-decoupling characteristics according to claim 2, characterized in that, The drive spindle is installed at the center of the inertial flywheel (5), and the damper body (1) is fixedly connected to the mounting base (4).

6. A permanent magnet energy recovery vibration damper with torsional self-decoupling characteristics according to claim 1, characterized in that, The inertial flywheel (5) is a disc-shaped high-strength alloy steel structural component, and the thickness of the middle part of the inertial flywheel (5) is less than the thickness of the rim.

7. A permanent magnet energy recovery vibration damper with torsional self-decoupling characteristics according to claim 3, characterized in that, The upper flexible beam (10) is connected to the load interface disk (3) and the inertial flywheel (5), and the lower flexible beam (11) is connected to the mounting base (4) and the inertial flywheel (5).

8. A permanent magnet energy recovery vibration damper with torsional self-decoupling characteristics according to claim 3, characterized in that, The lower flexible beam (11) is inclined to the inertial flywheel (5), and the upper flexible beam (10) is inclined to the inertial flywheel (5).

9. A permanent magnet energy recovery vibration damper with torsional self-decoupling characteristics according to claim 1, characterized in that, The first magnetic block (603) and the second magnetic block (604) are located inside the multi-stable stiffness layer (6) and are arranged with opposite polarities.

10. A permanent magnet energy recovery vibration damper with torsional self-decoupling characteristics according to claim 4, characterized in that, The coil frame (8) is fixedly connected to the damper body (1).

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