CN201173268Y - Magnetorheological Elastomer Vibration Isolators - Google Patents

Abstract

The utility model belongs to the field of electromechanical technology, and specifically relates to a magneto-rheological elastomer vibration isolator. The problem to be solved is that the structure of the current magnetorheological elastomer vibration isolator has a small bearing capacity and is not suitable for large loads and small amplitudes. Defects in vibration situations. The magneto-rheological elastic body of the utility model is fixedly connected between the cylindrical upper magnetoconductor and the lower magnetoconductor on which the coil winding is embedded, and the upper part of the upper magnetoconductor is connected with a non-magnetoconductor connecting rod; the upper magnetoconductor, the magnetic flow The variable elastic body, the lower magnetic conductor and the lower part of the connecting rod are all placed in the magnetic isolation outer cylinder with a non-magnetic cover plate on the upper part, and the upper part of the connecting rod protrudes from the cover plate and is connected with the controlled object; A sensor is fixed on the connecting rod, and the sensor forms a control system with the control unit and the power amplifier and is connected with the coil winding. The magneto-rheological elastomer vibration isolator has a simple structure, and is applicable to active and passive integrated vibration isolation and control of a heavy-duty micro-amplitude vibration structure.

Description

Magnetorheological Elastomer Vibration Isolators

technical field

The utility model belongs to the field of electromechanical technology, in particular to a vibration isolator made of magnetorheological elastomer material.

Background technique

At present, in the vibration isolation and control of structures, the commonly used vibration isolation devices mainly include passive vibration isolators and active vibration isolators. Because the passive vibration isolator uses ordinary rubber or metal spring as the damping element, it has no adjustment ability at all and has certain limitations. However, active vibration isolators generally have complex structures and consume a lot of energy, which limits their application in engineering practice. In order to overcome the limitations of traditional single passive or active vibration isolation methods, in recent years, some people have used magnetorheological elastomer materials to realize active and passive integrated vibration isolation and control of structures, but the structural type used is usually shear force. The method, that is, the magnetorheological elastomer material is affected by the shear force. This structural type has the disadvantage of low bearing capacity, and is not suitable for large-load and small-amplitude vibration occasions.

Contents of the invention

The purpose of the utility model is to overcome the above-mentioned defects existing in the prior art, and to provide an extruded magnetorheological elastomer vibration isolator which can adapt to the active and passive integrated vibration isolation and control of the heavy-duty micro-amplitude vibration structure.

The utility model achieves the above-mentioned purpose through the following technical scheme: the feature of the magnetorheological elastomer vibration isolator is: its magnetorheological elastomer is fixedly connected between the cylindrical upper magnetizer and the lower magnetizer, The upper coil winding and the lower coil winding are respectively embedded in the grooves on the outer circumferential surfaces of the upper magnet conductor and the lower magnet conductor, and the upper part of the upper magnet conductor is connected with a connecting rod; the upper magnet conductor, the magnetorheological elastomer, and the lower magnet conductor and the lower part of the connecting rod are placed in the magnetic isolation outer cylinder, the upper part of the magnetic isolation outer cylinder is provided with a cover plate, and the upper part of the connecting rod protrudes from the through hole on the cover plate and is connected with the controlled object; the connecting rod The sensor is fixed on the top, and the sensor is connected to the power amplifier through the control unit, and the power amplifier is connected to the upper coil winding and the lower coil winding through the cable; the magnetic isolation outer cylinder, cover plate and connecting rod are all made of non-magnetic material.

Compared with the prior art, the utility model has the following advantages:

1. Due to the use of magnetorheological elastomer as the damping material and the closed-loop control system, it has an adaptive active and passive integrated control function, which can improve the vibration isolation and control effect of the structure.

2. The magnetorheological elastomer bears the extrusion load, which greatly improves the bearing capacity of the vibration isolator.

3. Non-magnetic materials are used to form a sealed cavity around the magnetorheological elastomer and the upper and lower magnetizers, so that the magnetic field lines form a closed loop in the cavity of the outer cylinder, which can improve the working efficiency of the magnetorheological elastomer.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the utility model.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail.

Referring to FIG. 1 , there are grooves on the outer circumferential surfaces of the upper magnet conductor 6 and the lower magnet conductor 3 , and the upper coil winding 5 and the lower coil winding 1 are embedded in the groove. The magnetorheological elastomer 2 is fixedly connected between the upper magnetic conductor 6 and the lower magnetic conductor 3, bears the extrusion load, and is placed in the magnetic isolation outer cylinder 4 together with the upper and lower magnetic conductors; the magnetic isolation outer cylinder 4 The upper part is provided with cover plate 10. The lower part of the connecting rod 7 is connected with the upper part of the upper magnetic conductor 6 by screws, and the upper part of the connecting rod 7 protrudes from the through hole on the cover plate 10 and is connected with the controlled object 8 . The control system composed of the sensor 9 fixed on the connecting rod, the control unit module 12 and the power amplifier 11 is connected with the upper coil winding 5 and the lower coil winding 1 through cables. The upper and lower magnetic conductors are made of soft ferromagnetic material, and the magnetic isolation outer cylinder 4, cover plate 10 and connecting rod 7 are all made of nonmagnetic material, so that the magnetic force lines form a closed loop in the cavity of the magnetic isolation outer cylinder. The bottom of the magnetic isolation outer cylinder 4 is provided with an outer boss, and a through hole is arranged on the outer boss, through which the whole vibration isolator can be installed on the desired position with screws.

After the upper coil winding 5 and the lower coil winding 1 are energized, a magnetic field is generated between the upper magnet conductor 6 and the lower magnet conductor 3 , and the magnetic field acts on the magnetorheological elastomer 2 . Magnetorheological elastomer 2 is a kind of magnetorheological material. It is an intelligent solid material whose stiffness and damping are controlled by an external magnetic field. Its main components include rubber-like damping material as a matrix material and magnetic iron powder dispersed in it. particles.

The working principle of the vibration isolator shown in Figure 1 is: the vibration signal of the controlled object is sent to the control unit module 12 through the sensor 9 fixed on the connecting rod, and the control unit module 12 is based on the vibration characteristics and vibration isolation requirements of the controlled object 8 Timely adjust the current in the upper coil winding 5 and the lower coil winding 1, control the magnetic field strength between the upper magnetic conductor 6 and the lower magnetic conductor 3, and then change the stiffness and damping of the magnetorheological elastomer 2, so that the magneto-rheological elastomer 2 can be controlled. The power consumption of the rheological elastomer 2 can achieve the required active and passive integrated vibration isolation effect.

Since the magnetorheological elastomer 2 is placed between the upper magnet conductor 6 and the lower magnet conductor 3, it bears the extrusion load, greatly improving the bearing capacity of the vibration isolator, and the structure is simple.

Claims (3)

1. A magnetorheological elastomer vibration isolator, comprising a magnetorheological elastomer (2), characterized in that: the magnetorheological elastomer (2) is fixedly connected to a cylindrical upper conductor (6) and a lower conductor Between the magnets (3), an upper coil winding (5) and a lower coil winding (1) are respectively embedded in grooves on the outer circumferential surfaces of the upper magnet conductor (6) and the lower magnet conductor (3), and the upper magnet conductor ( The upper part of 6) is connected with a connecting rod (7); the upper magnetic conductor (6), the magnetorheological elastomer (2), the lower magnetic conductor (3) and the lower part of the connecting rod (7) are all placed in the magnetic isolation outer cylinder (4), the upper part of the magnetic isolation outer cylinder (4) is provided with a cover plate (10), and the upper part of the connecting rod (7) stretches out from the through hole on the cover plate (10) and is connected with the controlled object (8 ) connection; the connecting rod (7) is fixed with a sensor (9), the sensor (9) is connected with the power amplifier (11) through the control unit (12), and the power amplifier (11) is connected with the upper coil winding (5) through the cable It is connected with the lower coil winding (1); the magnetic isolation outer cylinder (4), the cover plate (10) and the connecting rod (7) are all made of non-magnetic material. 2. The magnetorheological elastomer vibration isolator according to claim 1, characterized in that: the bottom of the magnetic isolation outer cylinder (4) is provided with an outer boss, and the outer boss is provided with a through hole. 3. The magnetorheological elastomer vibration isolator according to claim 1 or 2, characterized in that: the composition of the material used in the magnetorheological elastomer (2) includes rubber damping material as the matrix material and dispersed in it Magnetic iron powder particles.

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