A magnetic inertia vibration reduction platform

Abstract

The present invention discloses a magnetic inertial capacitance vibration reduction platform, which relates to the technical field of inertial capacitance. The platform comprises a base, a magnetic inertial capacitance, and an upper mounting plate. The upper mounting plate is located above the base. The magnetic inertial capacitance comprises an inner ring structure and an outer ring structure. The inner ring structure is located inside the outer ring structure, with a gap between the inner and outer ring structures. The inner ring structure is provided with a plurality of first permanent magnets, and the outer ring structure is provided with a plurality of second permanent magnets. The inner ring structure is connected to the upper mounting plate and is relatively fixed thereto, while the outer ring structure rotates relative to the base. In low-frequency conditions, the inner ring structure of the present invention can drive the outer ring structure to rotate when performing linear motion. In high-frequency conditions, since the inner and outer ring structures do not contact each other, the high-frequency failure of traditional inertial capacitances can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of inertial vessels, and in particular to a magnetic inertial vessel vibration reduction platform. Background Art

[0002] Since their introduction, inertia vessels have been used as vibration absorbers, achieving low-frequency vibration isolation for the main system through the rotation of a flywheel. Due to the characteristics of the flywheel, only a small amount of additional mass is required to achieve a large virtual mass, thereby reducing the resonant frequency and peak resonance of the main system. There are two main types of solutions for implementing inertia vessels:

[0003] One type is mechanical, including both screw-nut and rack-and-pinion types. The screw-nut type uses the linear motion of the screw to drive the rotation of the nut. A flywheel is added to the nut to increase the moment of inertia of the rotating component, thereby increasing the inertia capacity and enhancing low-frequency vibration reduction performance. The rack-and-pinion type converts the linear motion of the rack into the rotation of the gear to achieve inertia characteristics. This solution can achieve different moments of inertia and different transmission ratios by matching different gears.

[0004] The other type is the fluid-based type, which uses linear motion to compress a fluid through the pipe to achieve vibration reduction. This solution uses a closed pipe as the flow channel, and the friction between the fluid and the pipe creates a damping force to achieve the purpose of inertia.

[0005] The first category involves models based on initial inertia. These models operate similarly to a capacitor, with the acceleration proportional to the difference in acceleration applied across the inertia. Inertia can be likened to mass. For a rotating flywheel, reasonable design can create a larger inertia with a smaller added mass, known as a virtual mass. The second category employs spiral flow channels to increase the damping force of the fluid. Their inherent dynamic characteristics resemble a parallel combination of damping force and inertia, leading to their wider application. However, both approaches have significant drawbacks that hinder their widespread adoption and adoption.

[0006] The main disadvantages of mechanical inertia capacitive loads include: because the linear and rotating parts are in direct contact, their processing and manufacturing precision requirements are high, and the manufacturing cost will affect the promotion and application of this solution; the mechanical inertia capacitive load requires lubrication and maintenance during use, which will increase the cost of use; under the action of impact loads, the contact surface of the mechanical inertia capacitive load is prone to point crushing, causing the entire structure to fail; the mechanical inertia capacitive load will lose its effect on high-frequency vibrations, so its frequency band of use is very narrow.

[0007] The main disadvantages of fluid-type inertial capacitance include: due to the presence of fluid, high requirements are placed on the processing and installation precision of the structure. Improper processing and installation will cause the fluid to leak, rendering the entire system ineffective; fluid-type inertial capacitance also cannot function well with high-frequency vibrations and has a narrow operating frequency band; and the structure of fluid-type inertial capacitance is more complex. Summary of the Invention

[0008] The purpose of the present invention is to provide a magnetic inertia vibration reduction platform, which uses non-contact magnetic force to transmit linear-rotational motion, reduces costs, and can play a role in both low-frequency vibration and high-frequency vibration.

[0009] To achieve the above object, the present invention provides the following solutions:

[0010] The present invention provides a magnetic inertia capacitance vibration reduction platform, comprising a base, a magnetic inertia capacitance, and an upper mounting plate, wherein the upper mounting plate is located above the base, the magnetic inertia capacitance comprises an inner ring structure and an outer ring structure, the inner ring structure being located on the inner side of the outer ring structure, a gap being present between the inner ring structure and the outer ring structure, the inner ring structure being provided with a plurality of first permanent magnets, the outer ring structure being provided with a plurality of second permanent magnets, the inner ring structure being connected to and relatively fixed to the upper mounting plate, and the outer ring structure being relatively rotatable with respect to the base.

[0011] Preferably, it further comprises a guide rod, one end of which is connected to the base, the other end of which passes through the upper mounting plate, and the guide rod is slidably connected to the upper mounting plate.

[0012] Preferably, a spring is provided between the upper mounting plate and the base, and the spring is sleeved on the outside of the guide rod.

[0013] Preferably, a mass block is provided on the upper mounting plate, and the inner ring structure is connected to the mass block.

[0014] Preferably, the magnetic inertia further includes a mounting sleeve, which is disposed on the base, the inner ring structure and the outer ring structure are both located in the mounting sleeve, and the outer ring structure is rotatably connected to the mounting sleeve.

[0015] Preferably, a plurality of first permanent magnets arranged in a spiral are provided on the side wall of the inner ring structure, and a plurality of second permanent magnets arranged in a spiral are provided on the side wall of the outer ring structure.

[0016] Preferably, at least one flywheel is provided on the outer ring structure.

[0017] Preferably, the mounting sleeve is provided with a mounting groove for mounting the flywheel.

[0018] Compared with the prior art, the present invention has achieved the following technical effects:

[0019] In the low-frequency state, the inner ring structure of the present invention can drive the outer ring structure to rotate when performing linear motion; in the high-frequency state, since the inner ring structure and the outer ring structure are not in contact, the high-frequency failure of the traditional inertial capacitor can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 Schematic diagram of the magnetic inertia vibration reduction platform of the present invention;

[0022] Figure 2 A cross-sectional view of the magnetic inertial capacitance structure of the present invention;

[0023] Figure 3 is the transfer rate curve of magnetic inertia;

[0024] Among them: 1-mass block, 2-guide rod, 3-spring, 4-base, 5-inner ring structure, 6-outer ring structure, 7-flywheel, 8-mounting sleeve, 9-bearing, 10-connecting rod mounting hole, 11-upper mounting hole, 12-flywheel mounting hole, 13-lower mounting hole. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The purpose of the present invention is to provide a magnetic inertia vibration reduction platform, which uses non-contact magnetic force to transmit linear-rotational motion, reduces costs, and can play a role in both low-frequency vibration and high-frequency vibration.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] like Figures 1 to 2As shown: This embodiment provides a magnetic inertia capacitance vibration reduction platform, including a base 4, a magnetic inertia capacitance, an upper mounting plate and a plurality of guide rods 2, the upper mounting plate is located above the base 4, one end of the guide rod 2 is connected to the base 4, and the other end of the guide rod 2 passes through the upper mounting plate, and the guide rod 2 and the upper mounting plate are slidably connected through a linear bearing 9, a spring 3 is provided between the upper mounting plate and the base 4, and the spring 3 is sleeved on the outside of the guide rod 2, the magnetic inertia capacitance includes an inner ring structure 5, an outer ring structure 6 and a mounting sleeve 8, the inner ring structure 5 is located on the inner side of the outer ring structure 6, the inner ring structure 5 is cylindrical, the outer ring structure 6 is cylindrical, and there is a gap between the inner ring structure 5 and the outer ring structure 6. There is a gap, which is preferably 2 mm. The peak force generated between the first permanent magnet of the corresponding inner ring structure 5 and the second permanent magnet of the outer ring structure 6 is 15 N. If a larger force is required, it can be obtained by increasing the overall size of the magnetic inertia vibration reduction platform and the magnetic flux of the first permanent magnet and the second permanent magnet. The side wall of the inner ring structure 5 is provided with a plurality of discrete first permanent magnets arranged in a spiral, and the side wall of the outer ring structure 6 is provided with a plurality of discrete second permanent magnets arranged in a spiral. The lift of the first permanent magnet and the second permanent magnet is the same, the polarity of each first permanent magnet is consistent, and the polarity of each second permanent magnet is consistent. The polarity of the first permanent magnet and the polarity of the second permanent magnet can be different or the same. For example, when the N pole of the first permanent magnet faces inward, the N pole of the second permanent magnet can face inward or outward. When the N pole of the first permanent magnet faces outward, the N pole of the second permanent magnet can face inward or outward. A mass block 1 is provided on the upper mounting plate. The inner ring structure 5 is connected to the mass block 1 through a connecting rod. A connecting rod mounting hole 10 is provided on the inner ring structure 5. An upper cover plate is provided on the upper end of the mounting sleeve 8. An upper mounting hole 11 is provided on the upper end of the mounting sleeve 8 for mounting the upper cover plate. A through hole for the inner ring structure 5 to pass through is provided on the upper cover plate. A mounting seat is provided at the lower end of the mounting sleeve 8, and a lower mounting hole 13 is provided on the mounting seat for connecting with the base 4. The inner ring structure 5 and the outer ring structure 6 are both located in the mounting sleeve 8. The outer ring structure 6 is rotatably connected to the mounting sleeve 8 through a bearing 9. A mounting groove for mounting a flywheel 7 is provided on the mounting sleeve 8. A flywheel mounting seat is provided at the corresponding position of the outer ring structure 6 and the mounting groove. A flywheel mounting hole 12 for mounting the flywheel 7 is provided on the flywheel mounting seat. At least one flywheel 7 is provided on the outer ring structure 6. The flywheel 7 rotates with the outer ring structure 6. By replacing the flywheel 7 with different rotational inertia, different vibration reduction effects can be achieved.

[0029] In this embodiment, guide rods 2 ensure that the upper mounting plate and base 4 have only vertical relative motion, while the outer ring structure 6 and base 4 have only rotational freedom. In this embodiment, the inner and outer ring structures 5 and 6 transmit motion via magnetic force, allowing the upper mounting plate, inner ring structure 5, and mass 1 to move linearly, simultaneously driving the rotation of the outer ring structure 6 and flywheel 7.

[0030] When mass 1 is in low-frequency motion, flywheel 7 follows the rotation with high precision, and the misalignment between inner ring structure 5 and outer ring structure 6 is very small. The calculation of its inertia, b, is consistent with the traditional mechanical inertia, as shown in equation (1). Therefore, at low frequencies, magnetic inertia can fulfill the function of mechanical inertia.

[0031]

[0032] Wherein, J is the sum of the moments of inertia of the flywheel 7 and the outer ring structure 6, and λ is the lift of the first permanent magnet or the second permanent magnet.

[0033] Due to its own rotational inertia, the outer ring structure 6 of the magnetic inertial capacitor cannot completely follow the movement of the inner ring structure 5. At low frequencies, the difference in followability is not obvious. However, when the mass block 1 and the inner ring structure 5 are in high-frequency motion, the flywheel 7 and the outer ring structure 6 will be in a quasi-static state. At this time, the force between the inner ring structure 5 and the outer ring structure 6 is approximately equivalent to providing a spring to the inner ring structure 5. At this time, it is equivalent to adding a stiffness spring to the mass block 1, and its stiffness is the stiffness of the linear part of the inner ring structure 5 and the outer ring structure 6. The inner ring structure 5 can still move freely while overcoming the magnetic force. Therefore, under high-frequency conditions, the magnetic inertial capacitor vibration reduction platform of this embodiment can still work normally, and the high-frequency failure phenomenon of traditional inertial capacitors can be avoided.

[0034] The force between the inner ring structure 5 and the outer ring structure 6 is a sine function over a lift. When the slip between the inner ring structure 5 and the outer ring structure 6 is very small, only the stiffness near the zero point of the sine function, that is, the linear part stiffness, is taken.

[0035] According to calculation, the transfer rate of magnetic inertia is as follows: Figure 3 As shown in the figure, it can be found that the magnetic inertial capacitor not only has the vibration reduction effect of the traditional inertial capacitor under low frequency conditions, but also does not warp under high frequency conditions, which will greatly simplify the use scenarios of the inertial capacitor.

[0036] Unlike the mechanical transmission of traditional inertial capacitors, the inner ring structure 5 and outer ring structure 6 of this embodiment use non-contact force transmission. Therefore, lubrication and mutual friction do not need to be considered during use and maintenance, which can greatly reduce the cost of use and effectively avoid the impact of impact and overload. The processing precision requirements of the magnetic inertial capacitor structure of this embodiment are not high. Both the inner ring structure 5 and the outer ring structure 6 can be processed using 3D printing technology and small magnetic blocks, reducing processing costs. The magnetic inertial capacitor of this embodiment can ensure low-frequency vibration reduction while maintaining good high-frequency applicability, and will not fail at high frequencies. Under the influence of impact or overload, because the inner ring structure 5 and the outer ring structure 6 are non-contact, when an overload occurs, the peak force of the inner ring structure 5 and the outer ring structure 6 will be passed to the next steady-state position to achieve overload protection, eliminating the risk of structural failure caused by impact or overload crushing that exists in traditional inertial capacitors.

[0037] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A magnetic inertia vibration reduction platform, characterized by: The magnetic inertia capacitor comprises a base, a magnetic inertia capacitor and an upper mounting plate, wherein the upper mounting plate is located above the base, the magnetic inertia capacitor comprises an inner ring structure and an outer ring structure, the inner ring structure is located inside the outer ring structure, a gap exists between the inner ring structure and the outer ring structure, the inner ring structure is provided with a plurality of first permanent magnets, the outer ring structure is provided with a plurality of second permanent magnets, the inner ring structure is connected to the upper mounting plate and is relatively fixed, and the outer ring structure rotates relative to the base; At least one flywheel is provided on the outer ring structure; The upper mounting plate and the inner ring structure perform linear motion, and simultaneously drive the outer ring structure and the flywheel to rotate.

2. The magnetic inertia vibration reduction platform according to claim 1, characterized in that: It also includes a guide rod, one end of which is connected to the base, and the other end of which passes through the upper mounting plate, and the guide rod is slidably connected to the upper mounting plate.

3. The magnetic inertia vibration reduction platform according to claim 2, characterized in that: A spring is provided between the upper mounting plate and the base, and the spring is sleeved on the outer side of the guide rod.

4. The magnetic inertia vibration reduction platform according to claim 1, characterized in that: A mass block is provided on the upper mounting plate, and the inner ring structure is connected to the mass block.

5. The magnetic inertia vibration reduction platform according to claim 1, characterized in that: The magnetic inertia capacitor further includes a mounting sleeve, which is disposed on the base. The inner ring structure and the outer ring structure are both located in the mounting sleeve, and the outer ring structure is rotatably connected to the mounting sleeve.

6. The magnetic inertia vibration reduction platform according to claim 1, characterized in that: A plurality of first permanent magnets arranged in a spiral are provided on the side wall of the inner ring structure, and a plurality of second permanent magnets arranged in a spiral are provided on the side wall of the outer ring structure.

7. The magnetic inertia vibration reduction platform according to claim 5, characterized in that: The mounting sleeve is provided with a mounting groove for mounting the flywheel.

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