Horizontal vibration isolation device based on magnetorheological effect

Abstract

The utility model belongs to the technical field of horizontal vibration isolation of industrial equipment, and particularly relates to a horizontal vibration isolation device based on a magnetorheological effect, which comprises an upper bell jar, an upper bending part, an upper connecting piece, an inverted pendulum leg, a lower bell jar, a lower bending part, a coil, a base and magnetorheological fluid, the lower end of the upper bell jar is connected with an upper connecting piece through an upper bend, the inverted pendulum leg is of a hollow circular tube structure, the upper end of the inverted pendulum leg is connected with the upper connecting piece, and the lower end of the inverted pendulum leg is connected with the lower bell jar; the lower bending part is located between the lower bell jar and the base, a gap between the outer edge of the lower bell jar and the outer edge of the base is filled with magnetorheological fluid, and a coil is wound around the bottom of a groove of the base. According to the utility model, the rheological effect and controllability of the magnetorheological material are utilized, and the change of the form of the magnetorheological fluid is realized by adjusting the magnitude of the coil current, so that the magnitude of the lower flexural damping force is controlled, and the rapid stability of the vibration isolation device in the horizontal vibration process is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of horizontal vibration isolation of industrial equipment, and particularly relates to a horizontal vibration isolation device with magnetorheological effect. Background Art

[0002] With the rapid development of modern industry and technology, high-precision and high-stability mechanical equipment has been widely used in various fields. However, these devices are often affected by external vibration interference during operation, which not only affects the operation accuracy of the devices, but may also cause damage to the devices themselves and shorten their service life. Therefore, how to effectively isolate and reduce the impact of external vibration on the devices has become a hot issue of concern in the industrial and academic circles.

[0003] Traditional vibration isolation devices mostly use elastic materials such as rubber and springs. Although they can reduce the impact of vibration to a certain extent, their vibration isolation effect and adaptability are limited. Especially in complex working conditions such as high-frequency vibration and impact load, the performance of traditional vibration isolation devices often fails to meet the requirements. In addition, once the damping and stiffness parameters of traditional vibration isolation devices are determined, it is very difficult to adjust them in real time, which limits their application in complex working conditions.

[0004] In recent years, as a new type of intelligent material, magnetorheological materials have shown great application potential in the field of vibration isolation with their unique rheological effect and controllability. Under the action of an external magnetic field, the viscosity and fluidity of magnetorheological materials can be rapidly changed within a short time, so as to realize the real-time regulation of damping and stiffness. This material can not only adapt to vibrations with different frequencies and amplitudes, but also achieve precise control of the vibration isolation performance by changing the magnetic field strength.

[0005] Therefore, a horizontal vibration isolation device that can adapt to various working environments and whose damping force changes in real time can be designed by combining magnetorheological materials. Summary of the Utility Model

[0006] In view of the technical problem that it is very difficult to adjust traditional vibration isolation devices in real time, the utility model provides a horizontal vibration isolation device with magnetorheological effect.

[0007] In order to solve the above technical problems, the technical scheme adopted by the utility model is as follows:

[0008] A horizontal vibration isolation device based on the magnetorheological effect, comprising an upper bell cover, an upper flexure, an upper connecting member, an inverted pendulum leg, a lower bell cover, a lower flexure, a coil, a base and magnetorheological fluid. The upper end of the upper bell cover is connected with a load. The lower end of the upper bell cover is connected with the upper connecting member through the upper flexure. A soft connection is achieved between the upper bell cover and the upper connecting member through the upper flexure. The inverted pendulum leg is a hollow circular tube structure. The upper end of the inverted pendulum leg is connected with the upper connecting member, and the lower end of the inverted pendulum leg is connected with the lower bell cover. The lower flexure is located between the lower bell cover and the base to provide the restoring force for the inverted pendulum leg. A piston-like structure is formed between the outer edge of the lower bell cover and the outer edge of the base. The gap between the outer edge of the lower bell cover and the outer edge of the base is filled with magnetorheological fluid. The coil is wound at the bottom of the groove of the base.

[0009] The lower flexure is fixed between the lower bell cover and the base by bolts, and threaded holes are provided on the base.

[0010] The inverted pendulum leg is made of an aluminum tube with a wall thickness of 1 mm.

[0011] The liquid level height of the magnetorheological fluid is four-fifths of the internal space height of the gap between the outer edge of the lower bell cover and the outer edge of the base.

[0012] Both the upper flexure and the lower flexure are made by precision machining of Maraging steel.

[0013] The shape of the piston-like structure is a spherical structure centered on the bending point of the lower flexure.

[0014] The coil is electrically connected to an adjustable power supply through a wire.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] The present utility model utilizes the rheological effect and controllability of the magnetorheological material. By adjusting the magnitude of the coil current, the change of the form of the magnetorheological fluid is realized, so as to control the magnitude of the damping force of the lower flexure, achieve the rapid stability of the vibration isolation device during the horizontal vibration process, solve the horizontal intelligent damping of equipment and operating tables with high-precision smoothness requirements, and can be adjusted in real time. Description of the Drawings

[0017] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only exemplary, and for those of ordinary skill in the art, other implementation drawings can be obtained by extension according to the provided drawings without creative work.

[0018] The structures, proportions, sizes, etc. shown in this specification are only used to match the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of this utility model. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that this utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in this utility model.

[0019] Figure 1 is a schematic structural diagram of the present invention;

[0020] Figure 2 is a front view of the present invention;

[0021] Figure 3 is a top view of the present invention.

[0022] Wherein: 1 is the upper bellows; 2 is the upper flexure; 3 is the upper connecting piece; 4 is the inverted pendulum leg; 5 is the lower bellows; 6 is the lower flexure; 7 is the coil; 8 is the base; 9 is the magnetorheological fluid. Specific embodiments

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. These descriptions are only to further illustrate the features and advantages of this utility model, rather than a limitation on the claims of this utility model; based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope protected by this application.

[0024] The following will further describe in detail the specific embodiments of this utility model in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate this utility model, but are not used to limit the scope of this utility model.

[0025] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0026] A horizontal vibration isolation device based on the magnetorheological effect, such as Figures 1-3As shown in the figure, it includes an upper bell jar 1, an upper flexure 2, an upper connecting piece 3, an inverted pendulum leg 4, a lower bell jar 5, a lower flexure 6, a coil 7, a base 8, and a magnetorheological fluid 9. A load is connected to the upper end of the upper bell jar 1. The lower end of the upper bell jar 1 is connected to the upper connecting piece 3 through the upper flexure 2. A flexible connection is achieved between the upper bell jar 1 and the upper connecting piece 3 through the upper flexure 2. The inverted pendulum leg 4 is a hollow circular tube structure. The upper end of the inverted pendulum leg 4 is connected to the upper connecting piece 3, and the lower end of the inverted pendulum leg 4 is connected to the lower bell jar 5. The lower flexure 6 is located between the lower bell jar 5 and the base 8 and is used to provide the restoring force of the inverted pendulum leg 4. A piston-like structure is formed between the outer side of the lower bell jar 5 and the outer side of the base 8. The gap between the outer side of the lower bell jar 5 and the outer side of the base 8 is filled with the magnetorheological fluid 9. The coil 7 is wound around the bottom of the groove of the base 8.

[0027] Furthermore, the lower flexure 6 is fixed between the lower bell jar 5 and the base 8 by bolts. Threaded holes are provided on the base 8 and can be fixed as required.

[0028] Furthermore, preferably, the inverted pendulum leg 4 is made of an aluminum tube with a wall thickness of 1 mm and can be regarded as a rigid rod.

[0029] Furthermore, the liquid level height of the magnetorheological fluid 9 is four-fifths of the internal space height of the gap between the outer side of the lower bell jar 5 and the outer side of the base 8.

[0030] Furthermore, both the upper flexure 2 and the lower flexure 6 are made by precision machining of Maraging steel.

[0031] Furthermore, the shape of the piston-like structure is a spherical structure centered on the bending point of the lower flexure 6.

[0032] Furthermore, the coil 7 is electrically connected to an adjustable power supply through a wire, and the current passing through the coil 7 is controllable.

[0033] The working process of the present utility model is as follows:

[0034] A rigid platform is mounted on the upper bellows 1 of three horizontal vibration isolation devices fixed to the bottom plate to form a simple horizontal vibration isolation system. Each support leg (i.e., the present utility model) has two flexures, with the short flexible flexure on top and the rigid flexure below. The upper flexure 2 serves as a hinge between the support leg and the platform, allowing the platform to move in the horizontal plane and restricting movement in other directions. The lower flexure 6 provides the necessary restoring force for the support leg to keep the support leg in an upright position. At the same time, a counterweight needs to be installed on the lower bellows 5. After careful adjustment, the percussion center of the support leg is exactly located at the effective bending point of the bending joint, thereby reducing the transmission of vibration energy to the platform. When the support leg is subjected to horizontal vibration, the restoring force of the lower flexure 6 balances the gravitational component of the load deviating from the vertical direction, achieving a quasi-zero stiffness with an ultra-low natural frequency. While being subjected to horizontal vibration, by adjusting the magnitude of the current in the coil 7, the change in the morphology of the magnetorheological fluid 9 is realized, thereby controlling the magnitude of the damping force received by the bending of the lower flexure 6. By adjusting the magnitude of the magnetorheological damping force, the bending degree of the lower flexure 6 can be reduced, so that the vibration isolation device can reach a stable state faster during horizontal vibration. When the entire platform is subjected to horizontal vibration, all three support legs provide harmonic restoring forces for the platform to maintain the stability of the entire system. The unique rheological effect and controllability of the magnetorheological material enable the device to meet the vibration isolation and damping requirements under various complex working conditions, providing a strong guarantee for the stable operation of industrial equipment.

[0035] Only the preferred embodiments of the present utility model have been described in detail above. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present utility model, and all such changes should be included within the protection scope of the present utility model.

Claims

1. A horizontal vibration isolation device based on magnetorheological effect, characterized in that: The invention comprises an upper bell jar (1), an upper flexure (2), an upper connecting piece (3), an inverted swing leg (4), a lower bell jar (5), a lower flexure (6), a coil (7), a base (8) and a magnetorheological fluid (9), wherein the upper end of the upper bell jar (1) is connected to a load, the lower end of the upper bell jar (1) is connected to the upper connecting piece (3) via the upper flexure (2), the upper bell jar (1) and the upper connecting piece (3) are softly connected via the upper flexure (2), the inverted swing leg (4) is a hollow circular tube structure, ... The upper end of the swing leg (4) is connected to the upper connecting piece (3), and the lower end of the inverted swing leg (4) is connected to the lower bell (5); the lower flexure (6) is located between the lower bell (5) and the base (8) to provide a restoring force for the inverted swing leg (4); a piston-like structure is formed between the outer edge of the lower bell (5) and the outer edge of the base (8); the gap between the outer edge of the lower bell (5) and the outer edge of the base (8) is filled with magnetorheological fluid (9); and a coil (7) is wound around the bottom of the groove of the base (8).

2. According to claim 1, a horizontal vibration isolation device based on magnetorheological effect is characterized in that: The lower flexure (6) is fixed between the lower bell (5) and the base (8) by means of bolts, and a threaded hole is provided on the base (8).

3. The horizontal vibration isolation device based on magnetorheological effect according to claim 1 is characterized in that: The inverted swing leg (4) is made of an aluminum tube with a wall thickness of 1 mm.

4. The horizontal vibration isolation device based on magnetorheological effect according to claim 1 is characterized in that: The liquid level of the magnetorheological fluid (9) is four fifths of the height of the internal space of the gap between the outer edge of the lower bell jar (5) and the outer edge of the base (8).

5. The horizontal vibration isolation device based on magnetorheological effect according to claim 1 is characterized in that: The upper flexure (2) and the lower flexure (6) are both made of martensitic steel through precision machining.

6. The horizontal vibration isolation device based on magnetorheological effect according to claim 1 is characterized in that: The shape of the piston-like structure is a spherical structure centered at the bending point of the lower flexure (6).

7. The horizontal vibration isolation device based on magnetorheological effect according to claim 1 is characterized in that: The coil (7) is electrically connected to an adjustable power supply via a wire.

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