Self-stabilizing magnetic levitation vibration isolation platform with variable stroke and variable load

Abstract

A stroke-variable and load-variable self-stabilizing magnetic levitation vibration isolation platform comprises a bearing platform used for installing a vibration-isolated object, an air floatation outer frame formed by an upper installation plate and a lower installation plate, a cage type structure formed by an upper magnetic rotor pressing plate and a lower magnetic rotor pressing plate, and a magnetic rotor array located in the cage type structure. Wherein the bearing platform is located on the outer side of the upper mounting plate and connected with the upper magnetic rotor pressing plate of the cage type structure through the supporting columns, and the cage type structure is movably arranged in the air floatation outer frame through the magnetic floatation assembly. The stable constant magnetic force is achieved by inducing uniform magnetic field distortion, the load capacity is adjusted by changing the number of the magnetic units, the vibration isolation stroke is changed by changing the position of the flexible magnetic boundary, and self-stable ultra-low-frequency and ultra-wideband vibration isolation can be achieved under the condition of no energy supply.

Description

Technical Field

[0001] This invention relates to a technology in the field of magnetic levitation vibration isolation, specifically a self-stabilizing magnetic levitation vibration isolation platform with variable stroke and variable load. Background Technology

[0002] Maglev vibration isolation platforms achieve non-contact levitation of objects using magnetic force, greatly eliminating mechanical friction and wear. They also cover a wide vibration range from ultra-low to high frequencies, demonstrating significant advantages in fields with stringent vibration isolation requirements, such as precision manufacturing, aerospace, and medical equipment, and have gained widespread attention and application. Existing maglev vibration isolation technologies are mostly actively controlled, requiring sensors to monitor vibration and adjust magnetic force to achieve closed-loop vibration suppression. Their limitations include reliance on a continuous and stable high-power supply; fixed load capacity leading to poor vibration isolation stability under varying loads; and a short and non-adjustable levitation stroke. Summary of the Invention

[0003] This invention addresses the problems of existing magnetic levitation vibration isolation technologies, such as inability to achieve vibration isolation in the absence of external power supply, limited levitation and horizontal motion stroke, and load-bearing capacity constrained by inherent parameters of hydrostatic air levitation and active maglev, making it difficult to flexibly adjust according to actual working conditions and adapt to different scenarios. It proposes a self-stabilizing magnetic levitation vibration isolation platform with variable stroke and variable load. This platform achieves stable constant magnetic force by inducing uniform magnetic field distortion, adjusts load capacity by changing the number of magnetic units, and changes vibration isolation stroke by altering the position of the flexible magnetic boundary. It can achieve self-stabilizing ultra-low frequency and ultra-wide frequency vibration isolation under power-free conditions.

[0004] This invention is achieved through the following technical solution:

[0005] This invention relates to a self-stabilizing magnetic levitation vibration isolation platform with variable stroke and variable load, comprising: a bearing platform for mounting the object to be isolated, an air-floating outer frame formed by an upper mounting plate and a lower mounting plate, a cage structure formed by upper and lower magnetic actuator pressure plates, and a magnetic actuator array located within the cage structure, wherein: the bearing platform is located outside the upper mounting plate and is connected to the upper magnetic actuator pressure plate of the cage structure through a support column, and the cage structure is movably set within the air-floating outer frame through magnetic levitation components.

[0006] The air flotation is achieved by an air flotation guide rail set between the upper and lower mounting plates and a matching air sleeve set on the cage structure, wherein the air sleeve moves axially along the air flotation guide rail.

[0007] The magnetic levitation component includes: a magnetic stator array disposed within the air-float outer frame and a corresponding magnetic actuator array disposed within the cage structure, wherein: the top of the magnetic stator array is disposed on the upper mounting plate via a magnetic stator positioning plate, the bottom of the magnetic stator array is disposed on the lower mounting plate, and each magnetic actuator in the magnetic actuator array is correspondingly sleeved outside the magnetic stator.

[0008] Technical effect

[0009] This invention utilizes a flexible magnetic boundary formed by a movable magnet and a fixed magnet. Through a periodic array structure of magnetic actuators and stators that requires no additional power supply, the number of array units can be adjusted without altering the platform structure. Compared to existing technologies, this invention can simultaneously achieve dynamic adjustment of the magnetic levitation load capacity and precise control of the magnetic levitation stroke while maintaining constant stiffness characteristics. It adapts to different load conditions without external power supply and effectively copes with vibrations and shocks of varying magnitudes. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of the present invention;

[0011] Figure 2 This is a schematic diagram of a floating component;

[0012] Figure 3 This is a schematic diagram of the fixed component;

[0013] Figure 4 The results of the vibration test are shown in the figure.

[0014] Figure 5 This is a schematic diagram illustrating the principle of magnetic levitation travel scaling in an embodiment.

[0015] Figure 6 This is a schematic diagram illustrating the load capacity adjustment principle in an example.

[0016] In the diagram: 1. Bearing platform, 2. Support column, 3. Magnetic actuator pressure plate, 4. Magnetic actuator array, 5. Air jacket, 6. Column, 7. Positioning tie rod, 8. Movable magnet, 9. Upper mounting plate, 10. Magnetic stator positioning plate, 11. Magnetic stator array, 12. Lower mounting plate, 13. Fixed magnet, 14. Air buoyancy guide rail. Detailed Implementation

[0017] like Figures 1-3 As shown, this embodiment relates to a self-stabilizing magnetic levitation vibration isolation platform with variable stroke and variable load, including: a bearing platform 1 for mounting the object to be isolated, an air-floating outer frame formed by an upper mounting plate 9 and a lower mounting plate 12, a cage structure formed by upper and lower magnetic actuator pressure plates 3, and a magnetic actuator array 4 located within the cage structure, wherein: the bearing platform 1 is located outside the upper mounting plate 9 and is connected to the upper magnetic actuator pressure plate 3 of the cage structure through a support column, and the cage structure is movably set within the air-floating outer frame through magnetic levitation components.

[0018] The air flotation is achieved by an air flotation guide rail 14 set between the upper mounting plate 9 and the lower mounting plate 12 and a matching air sleeve 5 set on the cage structure, wherein the air sleeve 5 moves axially along the air flotation guide rail 14.

[0019] The gas sleeve 5 is specifically fixed on the column 6 of the cage structure by a positioning tie rod. The relative position between the magnetic actuator array 4 and the magnetic stator array 11 is adjusted by adjusting the length of the positioning tie rod.

[0020] Several circumferential columns 6 are fixedly installed between the upper and lower magnetic pressure plates 3.

[0021] The magnetic levitation component includes: a magnetic stator array 11 disposed within the air-float outer frame and a corresponding magnetic actuator array 4 disposed within the cage structure, wherein: the top end of the magnetic stator array 11 is disposed on the upper mounting plate 9 via a magnetic stator positioning plate, the bottom end of the magnetic stator array 11 is disposed on the lower mounting plate 12, and each magnetic actuator in the magnetic actuator array 4 is correspondingly sleeved outside the magnetic stator.

[0022] The magnetic levitation assembly preferably further includes a stroke control assembly, which includes: a plurality of mutually exclusive movable magnets 8 and fixed magnets 13 respectively disposed on the upper magnetic actuator plate 3 and the upper mounting plate 9, and on the lower magnetic actuator plate 3 and the lower mounting plate 12, wherein the levitation stroke of the magnetic levitation platform 1 is controlled by adjusting the installation height of the movable magnets 8.

[0023] This embodiment tests the vibration isolation performance of the self-stabilizing magnetic levitation vibration isolation platform in the following way: an excitation signal is generated by a signal generator and input to a servo controller to drive a hydraulic vibrator. At the same time, acceleration sensors are set at the load end and the vibrator mounting platform end to collect response signals. Real-time monitoring and data storage are achieved through a data acquisition system. Finally, the vibration isolation performance of the device under different working conditions is quantitatively evaluated by comparing and analyzing the time-frequency characteristics of the excitation and response signals.

[0024] When the excitation signal is set to a 0-16Hz sine wave sweep, the vibration amplitude is set to 0.8 mm, 1.0 mm, and 1.2 mm respectively. For example... Figure 4 As shown, the resonant frequency of the magnetic levitation platform in this embodiment is 1Hz. When the excitation frequency is higher than 1.5Hz, it begins to have a vibration isolation effect. When the excitation frequency is higher than 12Hz, the vibration transmissibility is lower than -40dB.

[0025] like Figure 5 As shown in the embodiment, by changing the installation height of the movable magnet 9 and thus the air gap size of the magnetic boundary, the suspension stroke can be adjusted from 50 mm, 90 mm and 130 mm, while the load-bearing capacity is maintained at 145 N and the stiffness is maintained at 0 N / m.

[0026] like Figure 6 As shown in the embodiment, by changing the number of units in the magnetic actuator array 4 and the magnetic stator array 11, the load capacity of 145 N, 440 N and 860 N under one unit, three units and six units are adjusted, while the suspension stroke and suspension stiffness remain unchanged.

[0027] Compared with existing technologies, this invention achieves magnetic levitation load capacity adjustment in multiples of 145N, 440N, and 860N through a variable number of magnetic stators and magnetic actuator arrays; and achieves continuously adjustable suspension stroke from 50-130mm through a variable air gap magnetic boundary design. During the above adjustment process, this invention maintains a suspension stiffness of 0N / m at all times, while possessing a resonant frequency as low as 1Hz and a vibration attenuation capability of -40dB (excitation frequency >12Hz).

[0028] The above-described specific implementations can be partially adjusted by those skilled in the art in different ways without departing from the principles and purpose of the present invention. The scope of protection of the present invention is defined by the claims and is not limited to the above-described specific implementations. All implementation schemes within the scope of the claims are bound by the present invention.

Claims

1. A self-stabilizing magnetic levitation vibration isolation platform with variable stroke and variable load, characterized in that, include: The structure includes a support platform for mounting the vibration-isolated object, an air-floating outer frame formed by an upper mounting plate and a lower mounting plate, a cage structure formed by upper and lower magnetic actuator pressure plates, and a magnetic actuator array located within the cage structure. The support platform is located outside the upper mounting plate and is connected to the upper magnetic actuator pressure plate of the cage structure via a support column. The cage structure is movably mounted within the air-floating outer frame via magnetic levitation components.

2. The self-stabilizing magnetic levitation vibration isolation platform with variable stroke and variable load according to claim 1, characterized in that, The air flotation is achieved by an air flotation guide rail set between the upper and lower mounting plates and a matching air sleeve set on the cage structure, wherein the air sleeve moves axially along the air flotation guide rail.

3. The self-stabilizing magnetic levitation vibration isolation platform with variable stroke and variable load according to claim 2, characterized in that, The gas sleeve is specifically fixed to the column of the cage structure by a positioning tie rod, and the relative position between the magnetic actuator array and the magnetic stator array is adjusted by adjusting the length of the positioning tie rod.

4. The self-stabilizing magnetic levitation vibration isolation platform with variable stroke and variable load according to claim 1, characterized in that, Several circumferential columns are fixedly installed between the upper and lower magnetic pressure plates.

5. The self-stabilizing magnetic levitation vibration isolation platform with variable stroke and variable load according to claim 1 or 4, characterized in that, The magnetic levitation component includes: a magnetic stator array disposed within the air-float outer frame and a corresponding magnetic actuator array disposed within the cage structure, wherein: the top of the magnetic stator array is disposed on the upper mounting plate via a magnetic stator positioning plate, the bottom of the magnetic stator array is disposed on the lower mounting plate, and each magnetic actuator in the magnetic actuator array is correspondingly sleeved outside the magnetic stator.

6. The self-stabilizing magnetic levitation vibration isolation platform with variable stroke and variable load according to claim 1 or 5, characterized in that, The magnetic levitation assembly further includes a stroke control assembly, which includes several pairs of mutually exclusive movable magnets and fixed magnets respectively disposed on the upper magnetic actuator plate and the upper mounting plate, as well as on the lower magnetic actuator plate and the lower mounting plate. The levitation stroke of the magnetic levitation platform is controlled by adjusting the installation height of the movable magnets.

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