Mobile suspension system based on magnetic-air levitation composite bearing

Abstract

This invention relates to a mobile suspension system based on a magnetic-air levitation composite bearing, which solves the problem of existing magnetic-air levitation composite bearings being unable to work effectively in large-scale mobile tasks, and belongs to the field of mobile suspension. The invention includes a magnetic-air levitation suspension platform and a magnetic-air levitation composite bearing. The magnetic-air levitation suspension platform includes an expandable support structure, cast iron platform units, and thin film materials. Multiple expandable support structures are spliced ​​together, with a cast iron platform unit fixed on each expandable support structure. By adjusting the expandable support structures, the splicing distance and height difference between the cast iron platform units can be adjusted. A working plane is formed by multiple cast iron platform units, and multiple thin film materials are adhered to the working plane to ensure the overall flatness of the working plane and prevent air leakage at the splicing points of the cast iron platform units. The magnetic-air levitation composite bearing is inverted and adsorbed onto the working plane, allowing it to move without damping along with the product on the working plane.

Description

Technical Field

[0001] This invention relates to a suspension system based on a magnetic-air buoyancy composite bearing, belonging to the field of movable suspension. Background Technology

[0002] Existing mobile suspension systems typically employ two-dimensional truss guide rails. The following truss structures have a large mass, requiring significant driving force to move alongside the suspended product. When suspending multiple products, structural interference between the multiple following truss structures restricts the movement of the suspended products. Therefore, there is currently no feasible solution for tasks requiring the free movement of multiple suspended products throughout space.

[0003] Magnetic-air levitation composite bearings rely on air suspension and magnetic adsorption technologies. However, in tasks requiring large-scale planar movement, the working plane must be constructed from multiple platform units due to the maximum size limitations of the platform units. The height differences and gaps at these platform joints can cause jamming and gas leakage between the magnetic-air levitation composite bearing and the platform, thus affecting the performance of gas lubrication. Simultaneously, the coupling of strong magnetic fields induced by the magnetic structure between adjacent platforms results in a significant repulsive force exerted by the magnetic field at the joint on the magnetic-air levitation composite bearing. Furthermore, magnetic-air levitation bearings using traditional permanent magnets and electromagnets have relatively low maximum magnetic attraction force, and considering safety factors, their rated load is relatively small. Due to these multiple effects, magnetic-air levitation composite bearings are difficult to operate effectively in large-scale movement tasks. Summary of the Invention

[0004] To address the problems in existing suspension systems based on magnetic-air levitation composite bearings, such as motion stagnation caused by height differences at platform joints, gas leakage from the magnetic-air levitation composite bearings due to gaps at joints, and limitations on rated load, this invention provides a large-range mobile suspension system based on magnetic-air levitation composite bearings.

[0005] The present invention provides a movable suspension system based on a magnetic-air levitation composite bearing, comprising a magnetic-air levitation suspension platform and a magnetic-air levitation composite bearing;

[0006] The magnetic-air levitation suspension platform includes an expandable support structure, a cast iron platform unit, and a thin film material;

[0007] Multiple expandable support structures are spliced ​​together, and a cast iron platform unit is fixed on each expandable support structure. By adjusting the positional relationship between the expandable support structures and the corresponding cast iron platform units, the splicing distance and height difference between the cast iron platform units can be adjusted. Multiple cast iron platform units form a working plane, and multiple thin film materials are adhered to the working plane to ensure the overall flatness of the working plane and prevent air leakage at the splicing points of the cast iron platform units.

[0008] An expandable support structure is fixed at the top of the work site, and the magnetic-air levitation composite bearing is inverted and adsorbed on the working plane. The magnetic-air levitation composite bearing moves without damping along with the product on the working plane.

[0009] Preferably, the cast iron platform units are fixed to the expandable support structure by bolts, and the joint distance and height difference between the cast iron platform units can be adjusted by adjusting the bolts.

[0010] As a preferred method, by adjusting the thickness and number of individual sheets of the thin film material, the thickness between the strong magnetic structure and the cast iron platform unit in the magnetic-air levitation composite bearing is controlled, thereby reducing the intensity of the magnetic field induced by the strong magnetic structure on the cast iron platform unit and reducing the magnetic resistance generated by the magnetic-air levitation composite bearing under the induced coupling magnetic field of the adjacent cast iron platform unit when passing through the splice.

[0011] As a preferred option, the expandable support structure is constructed by splicing standard aluminum profiles with angle iron bolts. The structural dimensions and quantity of the expandable support structure are determined based on the site's working space.

[0012] Preferably, the magnetic-air levitation bearing includes a connecting rod, a hinge cover plate, an air filling hole, an air levitation structure, and a strong magnetic structure;

[0013] One end of the connecting rod is connected to the product to be suspended, and the other end of the connecting rod is a ball joint fixed to the air-float structure through a hinge cover plate; the air inlet is fixed to the air-float structure and is used to supply air to the air chamber inside the air-float structure; the strong magnetic structure is composed of multiple strong magnetic material units with different magnetic pole directions arranged in a ring-shaped Heilbeck array structure. The strong magnetic structure is embedded in the working plane of the air-float structure. Throttling holes are provided on the working plane of the air-float structure, and the working plane of the air-float structure is adsorbed onto the working plane of the magnetic-air-float suspension platform.

[0014] Preferably, the connection between the air flotation structure and the strong magnetic structure is achieved by adhesive bonding, with a distance of 1 mm between the surface of the strong magnetic structure and the working plane of the air flotation structure.

[0015] Preferably, the air-bearing structure has a diameter of 120mm, the strong magnetic material unit is a fan-shaped structure with a diameter of 65mm and a thickness of 6mm made of N52 grade neodymium iron boron material, and the distance between the strong magnetic structure and the cast iron platform unit is 1mm.

[0016] Preferably, a high-pressure air source of 0.4 to 0.8 MPa is provided to the internal air cavity of the air flotation structure through the air inlet.

[0017] Preferably, the cast iron platform unit is made of 5mm thick cold-rolled cast iron plate.

[0018] Preferably, the film material is a 1mm thick polyester film.

[0019] The beneficial effects of this invention are as follows: It eliminates the need for a complex magnetic servo control system, resulting in low development costs; it employs a magnetic-air levitation composite bearing for undamped planar movement of suspended products, and compared to truss guide rails, the planar movement damping of the magnetic-air levitation composite bearing is almost negligible, with minimal added mass and low required driving force; when suspending multiple products, there are no restrictions on the product movement path; this invention uses a magnetic-air levitation suspension platform composed of multiple cast iron platform units spliced ​​together and covered with thin film material. The bending stiffness of the thin film material ensures the flatness of the working surface and avoids the air levitation structure from... The air leakage at the joints of the cast iron platform ensures the performance of gas lubrication. By employing a strong magnetic structure arranged in a ring-shaped Heilbeck array, the maximum magnetic attraction of the magnetic-air levitation composite bearing is enhanced, thereby increasing the load capacity of the magnetic-air levitation composite bearing. By adjusting the thickness of the thin film material, the distance between the strong magnetic structure and the cast iron platform unit is indirectly controlled, reducing the magnetic repulsion generated by the induced coupling magnetic field of the strong magnetic structure on adjacent cast iron platform units. This eliminates the performance loss at the joints of the cast iron platform units and ensures that the magnetic-air levitation composite bearing can move without damping in a large area. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the movable suspension system based on a magnetic-air levitation composite bearing according to the present invention.

[0021] Figure 2 This is an exploded view of the magnetic-air levitation suspension platform of the present invention;

[0022] Figure 3 This is a schematic diagram of the magnetic-air-float composite bearing of the present invention;

[0023] Figure 4 yes Figure 3 Front view;

[0024] Figure 5 yes Figure 4 Top view;

[0025] Figure 6 It refers to the magnetic pole direction of each strongly magnetic material unit in the strongly magnetic structure;

[0026] Figure 7 This is a schematic diagram of the magnetic field lines of a strong magnetic structure in a ring-shaped Helbeck array. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0030] like Figure 1 As shown, the movable suspension system based on a magnetic-air levitation composite bearing in this embodiment includes a magnetic-air levitation suspension platform 1 and a magnetic-air levitation composite bearing 2. The magnetic-air levitation suspension platform 1 is fixed at the top of the work area, and the magnetic-air levitation composite bearing 2 is inverted and adsorbed onto the working plane of the magnetic-air levitation suspension platform 1, thereby suspending the product. The magnetic-air levitation composite bearing 2 can move without damping in the plane with the product, and the total mass of the follower mechanism is only the mass of the magnetic-air levitation composite bearing 2.

[0031] like Figure 2 As shown, the magnetic-air levitation suspension platform 1 in this embodiment includes an expandable support structure 1-1, a cast iron platform unit 1-2, and a thin film material 1-3;

[0032] Multiple expandable support structures 1-1 are spliced ​​together, and a cast iron platform unit 1-2 is fixed on each expandable support structure 1-1. By adjusting the positional relationship between the expandable support structure 1-1 and the corresponding cast iron platform unit 1-2, the splicing distance and height difference between the cast iron platform units 1-2 can be adjusted. Multiple cast iron platform units 1-2 form a working plane, and multiple thin film materials 1-3 are adhered to the working plane to ensure the overall flatness of the working plane and prevent air leakage at the splicing points of the cast iron platform units 1-2.

[0033] Based on the workspace, the structural dimensions and quantity of the expandable support structure 1-1 are determined. The expandable support structure 1-1 can be constructed using standard aluminum profiles joined together with angle iron bolts and fixed to the load-bearing walls or foundation supports of the site, serving as the main load-bearing structure of the magnetic-air levitation suspension platform 1. In this embodiment, the workspace is 2m x 4.5m, and three sets of expandable support structures 1-1, each 2m x 1.5m in size, are rigidly connected to the site's load-bearing structure. The cast iron platform unit 1-2 is a 5mm thick, 1.5m wide, and 2m long cold-rolled cast iron plate. The three sets of cast iron platform units 1-2 are sequentially bolted to the expandable support structure 1-1. By adjusting the bolts connecting to the expandable structure 1-1, the joint distance and height difference between the cast iron platform units 1-2 are adjusted to ensure the overall flatness of the formed work surface. The dimensions of the cast iron platform unit 1-2 are not limited to specific specifications.

[0034] In a preferred embodiment, the film material 1-3 may be made of polyester film material, but is not limited to this type. Multiple integral film materials 1-3 are adhered to the working plane formed by assembling multiple cast iron platform units 1-2 to ensure the overall flatness of the working plane and avoid performance loss caused by air leakage at the joints of the cast iron platform units 1-2. Simultaneously, by adjusting the thickness and number of individual film materials 1-3, the thickness between the strong magnetic structure in the magnetic-air levitation composite bearing 2 and the cast iron platform unit 1-2 is controlled, reducing the intensity of the magnetic field induced by the strong magnetic structure on the cast iron platform unit 1-2, and reducing the magnetic resistance generated by the induced coupling magnetic field of adjacent cast iron platform units 1-2 when the magnetic-air levitation composite bearing 2 passes through the joint.

[0035] The magnetic-air levitation bearing of this embodiment includes a connecting rod 2-1, a hinge cover plate 2-2, an air inlet 2-3, an air levitation structure 2-4, and a strong magnetic structure. One end of the connecting rod 2-1 is connected to the product to be suspended, and the other end of the connecting rod 2-1 is a ball joint fixed to the air levitation structure 2-4 through the hinge cover plate 2-2. The ball joint provides a certain attitude and angle adaptability. The hinge cover plate 2-2 and the air levitation structure 2-4 are fixed together with bolts. The air inlet 2-3 is fixed to the air levitation structure 2-4 and is used to supply air to the air chamber inside the air levitation structure 2-4. The strong magnetic structure is composed of multiple strong magnetic material units 2-5 with different magnetic pole directions arranged in a ring-shaped Heilbeck array structure. The strong magnetic structure 2-5 is embedded in the working plane of the air levitation structure 2-4. A throttling orifice is provided on the working plane of the air levitation structure 2-4. The working plane of the air levitation structure 2-4 is adsorbed onto the working plane of the magnetic-air levitation suspension platform 1. The center of the working surface of the air-bearing structure 2-4 adopts a hollow structure, with a strong magnetic structure embedded in it using adhesive. The strong magnetic structure is composed of multiple strong magnetic material units 2-5 with different magnetic pole directions, arranged in a ring-shaped Heilbeck array structure. The strong magnetic material units 2-5 are fixed together by adhesive, which can strengthen the magnetic force in the direction of the working surface of the strong magnetic structure, thereby increasing the maximum magnetic attraction force of the magnetic-air-bearing bearing.

[0036] In this embodiment, the air flotation structure 2-4 adopts a throttling orifice type structure. The structure contains an air cavity, and throttling orifices are arranged at the working surface. A stable air film is formed around the throttling orifices. The air film has a certain load-bearing capacity and eliminates friction during the movement of the working surface, thus playing a lubricating role. However, the air flotation structure 2-4 is not limited to this type and can also adopt other air flotation structures such as porous materials.

[0037] In the preferred embodiment, the connection between the air-float structure 2-4 and the strong magnetic structure is achieved by adhesive bonding. The distance between the surface of the strong magnetic structure and the working plane of the air-float structure 2-4 is 1mm. If the distance between the working surfaces is too small, the strong magnetic structure will wear the working surface of the magnetic-air-float suspension platform 1. In addition, the air-float structure 2-4 will produce a humming sound during operation, which will affect the gas lubrication effect.

[0038] In a preferred embodiment, the film materials 1-3 are 1mm thick polyester film materials, and the strong magnetic structure in the magnetic-air levitation composite bearing 2 is made of N52 grade neodymium iron boron material with a diameter of 25mm and a thickness of 6mm. It is recommended to use 5 sheets of 1mm thick polyester film materials, that is, the distance between the strong magnetic structure and the cast iron platform unit 1-2 is 5mm. At this time, the load capacity of the magnetic-air levitation composite bearing 2 is 6kg, and the magnetic repulsion force it experiences when passing through the splicing point of the cast iron platform unit can be ignored.

[0039] The magnetic enhancement principle of the strong magnetic structure in this embodiment is achieved by arranging multiple strong magnetic material units 2-5 with different magnetic pole orientations in a ring-shaped Heilbeck array structure using adhesive bonding. By cleverly optimizing the magnetic pole orientation of each part of the strong magnetic structure, the number of magnetic field lines in the working surface direction is increased, while the number of magnetic field lines in the non-working surface direction is reduced. Figure 7 As shown, since the maximum magnetic attraction force is proportional to the number of magnetic field lines cut by the magnetic material, the maximum magnetic attraction force of the strong magnetic structure in the working surface direction is enhanced.

[0040] The working principle of the magnetic-air levitation composite bearing 2 in this embodiment is as follows: In the vertical direction, the magnetic-air levitation composite bearing 2 is balanced by the magnetic attraction between the strong magnetic structure and the cast iron platform unit 1-2, the supporting force between the air levitation structure 2-4 and the thin film material 1-3 in the magnetic-air levitation composite bearing 2, and the weight of the product to be suspended; In the horizontal direction, an air film is formed between the air levitation structure 2-4 and the thin film material 1-3 in the magnetic-air levitation composite bearing 2, eliminating friction during planar movement, and is only subject to the horizontal traction force generated by the movement of the suspended product. Therefore, the magnetic-air levitation composite bearing 2 can track the planar movement of the suspended product without damping.

[0041] The large-range mobile suspension system based on magnetic-air levitation composite bearings in this embodiment requires a stable high-pressure air source of 0.4 to 0.8 MPa to supply air to the air levitation structure 2-4, thereby forming an air film.

[0042] The structural parameter design method for a large-range mobile suspension system based on a magnetic-air-float composite bearing in this embodiment determines the system's load capacity, i.e., the weight of the suspended product. This primarily depends on the working surface dimensions of the air-float structure 2-4, the adsorption capacity of the strong magnetic structure, and the distance between the strong magnetic structure and the cast iron platform unit 1-2. For a system with a load capacity of 6 kg, the air-float structure 2-4 uses a 120 mm diameter throttling orifice structure, and the strong magnetic structure is made of N52 grade neodymium iron boron material with a diameter of 65 mm and a thickness of 6 mm to form the strong magnetic material unit 2-5. The distance between the strong magnetic structure and the cast iron platform unit 1-2 is 1 mm, but this is not a limitation. For a system with a load capacity of 3 kg, the air-float structure 2-4 uses a 120 mm diameter throttling orifice structure, and the strong magnetic structure is made of N42 grade neodymium iron boron material with a diameter of 20 mm and a thickness of 5 mm to form the strong magnetic material unit 2-5. The distance between the strong magnetic structure and the cast iron platform unit 1-2 is 2 mm, but this is not a limitation. For other load capacity requirements, the design is based on the above structural reference dimensions.

[0043] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A movable suspension system based on a magnetic-air levitation composite bearing, characterized in that, Including magnetic-air levitation suspension platforms and magnetic-air levitation composite bearings; The magnetic-air levitation suspension platform includes an expandable support structure, a cast iron platform unit, and a thin film material; Multiple expandable support structures are spliced ​​together, and a cast iron platform unit is fixed on each expandable support structure. By adjusting the positional relationship between the expandable support structures and the corresponding cast iron platform units, the splicing distance and height difference between the cast iron platform units can be adjusted. Multiple cast iron platform units form a working plane, and multiple thin film materials are adhered to the working plane to ensure the overall flatness of the working plane and prevent air leakage at the splicing points of the cast iron platform units. An expandable support structure is fixed at the top of the work site, and the magnetic-air levitation composite bearing is inverted and adsorbed on the working plane. The magnetic-air levitation composite bearing moves without damping with the product on the working plane. The magnetic-air-float composite bearing includes a connecting rod, a hinge cover plate, an air filling hole, an air-float structure, and a strong magnetic structure. One end of the connecting rod is connected to the product to be suspended, and the other end of the connecting rod is a ball joint fixed to the air-float structure through a hinge cover plate; the air inlet is fixed to the air-float structure and is used to supply air to the air chamber inside the air-float structure; the strong magnetic structure is composed of multiple strong magnetic material units with different magnetic pole directions arranged in a ring-shaped Heilbeck array structure. The strong magnetic structure is embedded in the working plane of the air-float structure. Throttling holes are provided on the working plane of the air-float structure, and the working plane of the air-float structure is adsorbed onto the working plane of the magnetic-air-float suspension platform.

2. The movable suspension system based on a magnetic-air levitation composite bearing according to claim 1, characterized in that, The cast iron platform units are fixed to the expandable support structure by bolts. The joint distance and height difference between the cast iron platform units can be adjusted by adjusting the bolts.

3. The movable suspension system based on a magnetic-air levitation composite bearing according to claim 1, characterized in that, By adjusting the thickness and number of individual sheets of thin film material, the thickness between the strong magnetic structure and the cast iron platform unit in the magnetic-air levitation composite bearing is controlled, thereby reducing the intensity of the magnetic field induced by the strong magnetic structure on the cast iron platform unit and reducing the magnetic resistance generated by the magnetic-air levitation composite bearing under the induced coupling magnetic field of the adjacent cast iron platform unit when passing through the splice.

4. The movable suspension system based on a magnetic-air levitation composite bearing according to claim 1, characterized in that, The expandable support structure is constructed from standard aluminum profiles assembled with angle iron bolts. The structural dimensions and quantity of the expandable support structure are determined based on the site's working space.

5. The movable suspension system based on a magnetic-air levitation composite bearing according to claim 1, characterized in that, The connection between the air flotation structure and the strong magnetic structure is achieved by adhesive bonding, with a distance of 1 mm between the surface of the strong magnetic structure and the working plane of the air flotation structure.

6. The movable suspension system based on a magnetic-air levitation composite bearing according to claim 1, characterized in that, The air-floating structure has a diameter of 120mm, the cross-section of the strong magnetic material unit is a fan-shaped structure with a diameter of 65mm, and the N52 grade neodymium iron boron material has a thickness of 6mm. The distance between the strong magnetic structure and the cast iron platform unit is 1mm.

7. The movable suspension system based on a magnetic-air levitation composite bearing according to claim 1, characterized in that, A high-pressure air source of 0.4~0.8MPa is provided to the air cavity inside the air flotation structure through the air inlet.

8. The movable suspension system based on a magnetic-air levitation composite bearing according to claim 1, characterized in that, The cast iron platform unit is made of 5mm thick cold-rolled cast iron plate.

9. The movable suspension system based on a magnetic-air levitation composite bearing according to claim 1, characterized in that, The film material is a 1mm thick polyester film.

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