Magnetorheological elastomer damper device based on basin-shaped metal rubber and working method thereof

Abstract

The application provides a pot-shaped metal rubber-based magneto-rheological elastomer damping device and a working method thereof. The device comprises a top plate connected with the damping device, the top plate is connected with a conical magneto-rheological elastomer through adhesion in a slot hole in the middle of the top plate, and the top plate is connected with a ring-shaped magneto-rheological elastomer through adhesion in a convex part around the top plate, the lower surface of the ring-shaped magneto-rheological elastomer is connected with a magneto-rheological elastomer protective cover (4) through adhesion, a coil holder (5) with a winding electromagnetic coil is sleeved in the shell, the electromagnetic coil is connected with a controller (10) through a lead wire, and a pot-shaped metal rubber damper (8) is fixed in the coil holder; the controller is connected with an acceleration sensor (11) at the top plate; the damping device can realize self-adaptive adjustment of system parameters with the change of time and external excitation, the magnetic flux passing through the magneto-rheological elastomer is greatly improved, the rheological performance of the magneto-rheological elastomer is strengthened, and the damping device still has a certain damping effect after power-off.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of vibration and noise reduction, and in particular to a magnetorheological elastomer damping device based on a basin-shaped metal rubber and a working method thereof. BACKGROUND

[0002] Vibration is ubiquitous in daily life and engineering applications. Unwanted vibration phenomena bring many inconveniences to people's life and production. For example, strong vibration of an engine can affect the safety and comfort of a vehicle, structural resonance can cause deformation of civil buildings and bridges, and affect important indicators such as precision, service life and safety of mechanical equipment. Therefore, damping plays a crucial role in the fields of aerospace, national defense, construction engineering, logistics transportation and the like. Passive damping relies on the damping device itself to dissipate vibration energy, and has the shortcomings of great passivity and poor adaptability to external environment; active damping uses external energy to actively exert a reverse force to quickly suppress structural vibration, although the effect is obvious, the control process is complex and the cost is high; semi-active damping is between the two, which mainly utilizes controllability of damping stiffness of the material itself to change the natural frequency of the system, so as to avoid resonance frequency to achieve damping effect, and has the advantages of economy and reliability of passive damping and adaptability of active damping, and has the advantages of simple structure, high control precision and low energy consumption, providing a new solution for the damping problem of the structure.

[0003] Magnetorheological elastomer (MRE) is a new type of intelligent material with magnetic control performance, which has the advantages of magnetorheological material and elastomer, and successfully overcomes the shortcomings of magnetorheological fluid such as easy sedimentation, poor stability and particle wear. Under the action of an external magnetic field, the material has a magnetic field controllable and reversible mechanical property, and the response speed is very fast. In addition, the material has the characteristics of simple preparation process and low price, and the application device does not need to be sealed, and has stable characteristics. In recent years, it has been widely used in the fields of damping and intelligent driving.

[0004] MRE damping devices are widely used in the fields of aerospace, automobile industry, building structure, medical equipment and electronic equipment. Compared with traditional mechanical damping devices, MRE damping devices have high control precision and stability, and can work in a wider frequency range, so they are a kind of efficient damping means. However, most of the damping devices based on magnetorheological elastomers currently proposed adopt a single working mode of shearing or extrusion, the adjustable range of stiffness and damping is small, the longitudinal stiffness is low, the coil is located on one side of the magnetorheological elastomer, the magnetic field utilization rate is insufficient, and the damping device cannot maintain good damping effect after power failure, without power failure protection. SUMMARY

[0005] The application provides a pot-shaped metal rubber-based magneto-rheological elastomer damping device and a working method thereof, which can realize self-adaptive adjustment of system parameters with time and external excitation, greatly improve the magnetic flux through the magneto-rheological elastomer, strengthen the rheological performance of the magneto-rheological elastomer, organically combine the controllable magneto-rheological active damping technology and the metal rubber passive damping technology, and keep a certain damping effect after the damping device is powered off.

[0006] The application adopts the following technical scheme.

[0007] The pot-shaped metal rubber-based magneto-rheological elastomer damping device comprises a top plate (1) connected with a device to be damped, the top plate is connected with a conical magneto-rheological elastomer (2) through adhesion at a slot hole in the middle of the top plate, and the top plate is connected with a ring-shaped magneto-rheological elastomer (3) through adhesion at a convex part around the top plate, the lower surface of the ring-shaped magneto-rheological elastomer is connected with a magneto-rheological elastomer protective cover (4) through adhesion, a coil holder (5) with a winding electromagnetic coil is arranged in the shell, the electromagnetic coil is connected with a controller (10) through a lead wire, and a pot-shaped metal rubber damper (8) is fixed in the coil holder.

[0008] The pot-shaped metal rubber damper comprises a damper sleeve (801), an upper metal rubber gasket (802) arranged on the upper part of the inner cavity of the damper sleeve, a support rod (803) arranged at the central part of the inner cavity of the damper sleeve, a plurality of magneto-rheological elastomers (804) arranged at the middle part of the inner cavity of the damper sleeve, a lower metal rubber gasket (807) arranged at the lower part of the inner cavity of the damper sleeve, and a plurality of pot-shaped metal rubbers (809) arranged at the upper part and the lower part of the inner cavity of the damper sleeve.

[0009] The top and bottom of each magneto-rheological elastomer is provided with a soft iron sheet (805); the upper part and the lower part of the support rod (803) are sleeved with a compression spring (808) and a spring gasket (810).

[0010] The upper part and the lower part of the inner cavity of the damper sleeve are provided with two pot-shaped metal rubbers, a middle gasket (806) is arranged between the two pot-shaped metal rubbers, and each magneto-rheological elastomer is arranged between the pot-shaped metal rubbers and the middle gasket.

[0011] The upper part of the inner cavity of the damper sleeve and the pot-shaped metal rubber are provided with the upper metal rubber gasket (802); the lower part of the inner cavity of the damper sleeve and the pot-shaped metal rubber are provided with the lower metal rubber gasket (807).

[0012] The middle part of the upper metal rubber gasket and the lower metal rubber gasket is provided with a groove for accommodating the compression spring, and the compression spring is arranged in the groove to provide a pre-tightening force.

[0013] The small diameter section of the upper and lower part of the support rod is sleeved with spring washers (810), so that the spring washers (810) are arranged at the inner recessed positions of the two basin-shaped metal rubbers.

[0014] The magnetorheological elastomer protective cover is connected with the bottom of the shell (6) through a fastener; the top of the shell is connected with the end cover (7) through a fastener; the damping device outer sleeve is fixed in the middle of the coil holder; the top plate, the coil holder and the end cover are all provided with lead holes;

[0015] The top plate, the shell, the damping device outer sleeve, the support rod, the middle spacer, the lower metal rubber pad and the spring washer are all made of magnetic conductive material;

[0016] The magnetorheological elastomer protective cover, the end cover, the upper metal rubber pad and the compression spring are all made of non-magnetic conductive material.

[0017] The top of the support rod is connected with the conical magnetorheological elastomer in an adhesive manner, so that the conical magnetorheological elastomer works in a shear mode.

[0018] The assembly method of the damping device specifically includes the following steps:

[0019] Step A1, first determine the stiffness of the basin-shaped metal rubber and the compression spring, pass a spring washer, a basin-shaped metal rubber, a soft iron sheet and a magnetorheological elastomer from one end of the small diameter of the support rod, adhere the conical magnetorheological elastomer to the top circular table part of the support rod, and connect the middle spacer and the support rod together through threads;

[0020] Step A2, set the same spring washer, basin-shaped metal rubber, soft iron sheet and magnetorheological elastomer below the middle spacer, arrange the compression spring, the upper metal rubber pad and the lower metal rubber pad on one side of the bottom surface of the basin-shaped metal rubber through the two ends of the support rod;

[0021] Step A3, pass the damping device outer sleeve through the through hole in the top from one section of the large diameter of the support rod; pass the shell through the through hole in the bottom from the top of the damping device outer sleeve, and make the lower bottom surface of the shell flush with the lower metal rubber pad;

[0022] Step A4, uniformly wind the electromagnetic coil in the coil holder, set the coil holder in the middle through hole on the outside of the damping device outer sleeve and the inside of the shell, fix the end cover and the shell through screws, lead the electromagnetic coil out of the outside of the damping device through the lead hole and connect it with the controller;

[0023] Step A5, adhere the annular magnetorheological elastomer to the inner boss surface of the magnetorheological elastomer protective cover, set the annular magnetorheological elastomer on the outside of the shell, connect the magnetorheological elastomer protective cover with the shell through the mounting hole; connect the top plate with the annular magnetorheological elastomer and the conical magnetorheological elastomer through adhesion, and connect the damping device with the top plate through bolts.

[0024] The working method of the pot-shaped metal rubber-based magneto-rheological elastomer damping device uses the pot-shaped metal rubber-based magneto-rheological elastomer damping device described above, and is characterized in that the working method comprises a small-vibration working condition method and a large-vibration working condition method.

[0025] The small-vibration working condition method specifically comprises the following steps: in operation, when the vibration received by the damping device is lower than a threshold value, the acceleration sensor collects vibration signals when the top plate moves and transmits the vibration signals to the controller, the controller does not energize the electromagnetic coil, and the damping device relies on the compensation mechanism formed by the pot-shaped metal rubber damper to achieve a damping effect; in this working condition, the magneto-rheological elastomer in the damping device has the mechanical properties of ordinary rubber elastomers, forces are transmitted to the annular magneto-rheological elastomer and the conical magneto-rheological elastomer through the top plate, the force transmitted to the annular magneto-rheological elastomer is consumed by the self-damping of the annular magneto-rheological elastomer, and the force transmitted to the conical magneto-rheological elastomer drives the middle gasket through the support rod to consume the energy in the form of longitudinal displacement movement; at this time, the damping effects of the magneto-rheological body and the pot-shaped metal rubber themselves, the elastic effect of the compression spring located in the middle recess of the upper metal rubber gasket and the lower metal rubber gasket, and the pot-shaped metal rubber damping device cooperate to absorb the energy transmitted by the vibration.

[0026] When power supply is interrupted, the pot-shaped metal rubber-based magneto-rheological elastomer damping device works using the small-vibration working condition method.

[0027] The large-vibration working condition method specifically comprises the following steps: in operation, when the vibration received by the damping device is greater than a threshold value, the acceleration sensor collects vibration signals when the top plate moves and transmits the vibration signals to the controller, the controller receives and processes the signals and controls the output of the current on the electromagnetic coil, so that the electromagnetic coil generates a magnetic field; the electromagnetic coil is arranged in the middle, and the structure using magnetic conductive material can make the magnetic induction line of the electromagnetic coil pass through, so as to increase the magnetic field strength in the magneto-rheological elastomer; in this working condition, when the top plate moves, the annular magneto-rheological elastomer and the conical magneto-rheological elastomer are compressed, so that the working mode of the former is shear and the working mode of the latter is extrusion; the conical magneto-rheological elastomer drives the support rod and the middle gasket to do longitudinal displacement movement in the damper sleeve, and compresses the pot-shaped metal rubber and the compression spring at the same time, and also drives the soft iron sheet to compress the magneto-rheological elastomer, thereby playing a damping role; in this working condition, the stiffness of the magneto-rheological elastomer changes with the magnetic field strength in the elastomer, that is, changes with the current, so that the damping device achieves a wider active damping frequency band of the vibration frequency.

[0028] Compared with the prior art, the present application has the following beneficial effects:

[0029] (1) The present application adopts a new type of material, metal rubber, which has good environmental adaptability, can be applied to high-temperature and irradiation scenes, and replaces traditional rubber or polyurethane materials and other cushioning materials, is suitable for different working conditions, has strong durability, a long usable period, and a long service life.

[0030] (2) The present invention utilizes magnetorheological elastomer vibration reduction technology with high energy consumption, damping and stiffness that can adapt to changes in time and excitation to specifically enhance vibration reduction of resonance peak and significantly broaden the vibration reduction frequency band of the vibration reduction device.

[0031] (3) The coil is arranged in the middle of the magnetorheological elastomer, which increases the number of magnetic field lines passing through the magnetorheological elastomer, thereby improving the magnetorheological efficiency of the magnetorheological elastomer.

[0032] (4) When the coil is not energized, the magnetorheological elastomer, the basin-shaped metal rubber and the compression spring with the mechanical properties of ordinary rubber elastomer can ensure the vibration reduction function of the vibration reduction device, and at the same time realize the power failure protection.

[0033] (5) The present invention combines a magnetorheological elastomer in multiple working modes with a basin-shaped metal rubber damper, which improves the defects of low utilization rate and limited load-bearing capacity of single shear magnetic circuit, small controllable stiffness range of single extrusion type, only applicable to small working stroke, and narrow working frequency band of passive damper stiffness and damping that cannot be adjusted.

[0034] This invention enables the vibration damping device to adaptively adjust system parameters according to changes in time and external excitation; it significantly increases the magnetic flux passing through the magnetorheological elastomer, thereby enhancing the rheological properties of the magnetorheological elastomer; and it organically combines controllable magnetorheological active vibration damping technology with metal-rubber passive vibration damping technology, so that the vibration damping device still maintains a certain vibration damping effect after power failure. Attached Figure Description

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0036] Appendix Figure 1 This is a three-dimensional schematic diagram of the overall vibration damping device of the present invention;

[0037] Appendix Figure 2 This is a cross-sectional schematic diagram of the vibration damping device of the present invention;

[0038] Appendix Figure 3 This is a schematic cross-sectional view of the basin-shaped metal-rubber vibration damper of the present invention;

[0039] Appendix Figure 4 This is a cross-sectional schematic diagram of the magnetorheological elastomer protective cover of the present invention;

[0040] Appendix Figure 5 This is a cross-sectional view of the outer casing of the present invention.

[0041] The figure label explanation: 1, top plate; 2, tapered magnetorheological elastomer; 3, ring-shaped magnetorheological elastomer; 4, magnetorheological elastomer protective cover; 5, coil holder; 6, shell; 7, end cover; 8, basin-shaped metal rubber shock absorber; 9, power supply; 10, controller; 11, acceleration sensor; 801, shock absorber sleeve; 802, upper metal rubber pad; 803, basin-shaped metal rubber; 804, magnetorheological elastomer; 805, soft iron sheet; 806, middle spacer; 807, lower metal rubber pad; 808, compression spring; 809, support rod; 810, spring pad. DETAILED DESCRIPTION

[0042] The application will be further described below in conjunction with the drawings and examples.

[0043] It should be noted that the following detailed description is illustrative only, and is intended to provide a further example of the present application in a best mode as to how to make and use the application. Other variations of the application will be apparent to those of ordinary skill in the art and it is intended to be covered by the following claims, unless otherwise noted.

[0044] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application; as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0045] As shown in the figure, the basin-shaped metal rubber-based magnetorheological elastomer damping device comprises a top plate 1 connected with the damping device, the top plate is connected with the tapered magnetorheological elastomer 2 through adhesion in the slot hole in the middle part, and is connected with the ring-shaped magnetorheological elastomer 3 through adhesion in the protruding part around the edge, the lower surface of the ring-shaped magnetorheological elastomer is connected with the magnetorheological elastomer protective cover 4 through adhesion, the shell is sleeved with the coil holder 5 wound with an electromagnetic coil, the electromagnetic coil is connected with the controller 10 through a lead wire, and the coil holder is fixed with the basin-shaped metal rubber shock absorber 8; the controller is connected with the acceleration sensor 11 at the top plate.

[0046] The basin-shaped metal rubber shock absorber comprises a shock absorber sleeve 801, further comprises an upper metal rubber pad 802 arranged on the upper part of the inner cavity of the shock absorber sleeve, a support rod 803 arranged on the central axis part of the inner cavity of the shock absorber sleeve, a plurality of magnetorheological elastomers 804 arranged in the middle part of the inner cavity of the shock absorber sleeve, a lower metal rubber pad 807 arranged on the lower part of the inner cavity of the shock absorber sleeve, and a plurality of basin-shaped metal rubbers 809 arranged on the upper and lower parts of the inner cavity of the shock absorber sleeve.

[0047] The top and bottom of each piece of magneto-rheological elastomer is provided with a soft iron sheet 805; the upper and lower parts of the support rod 803 are sleeved with a compression spring 808 and a spring washer 810.

[0048] The upper and lower parts of the inner cavity of the shock absorber outer sleeve are provided with two basin-shaped metal rubbers, and a middle spacer 806 is arranged between the two basin-shaped metal rubbers, and each piece of magneto-rheological elastomer is arranged between the basin-shaped metal rubber and the middle spacer.

[0049] An upper metal rubber washer 802 is arranged between the inner wall of the inner cavity of the shock absorber outer sleeve and the upper basin-shaped metal rubber; a lower metal rubber washer 807 is arranged between the inner wall of the inner cavity of the shock absorber outer sleeve and the lower basin-shaped metal rubber.

[0050] The middle part of the upper metal rubber washer and the lower metal rubber washer is provided with a groove for accommodating the compression spring, and the compression spring is arranged in the groove to provide a pre-tightening force.

[0051] The small-diameter section of the upper and lower parts of the support rod is sleeved with a spring washer 810, so that the spring washer 810 is arranged at the inner recessed part of the two basin-shaped metal rubbers.

[0052] The magneto-rheological elastomer protective cover is connected with the bottom of the shell 6 through a fastener; the top of the shell is connected with the end cover 7 through a fastener; the shock absorbing device outer sleeve is fixed in the middle of the coil holder; the top plate, the coil holder and the end cover are all provided with lead holes;

[0053] The top plate, the shell, the shock absorbing device outer sleeve, the support rod, the middle spacer, the lower metal rubber washer and the spring washer are all made of magnetic conductive material;

[0054] The magneto-rheological elastomer protective cover, the end cover, the upper metal rubber washer and the compression spring are all made of non-magnetic material.

[0055] The top of the support rod is connected with the conical magneto-rheological elastomer in a manner of adhesion, so that the conical magneto-rheological elastomer works in a shear mode.

[0056] The assembly method of the shock absorbing device specifically includes the following steps:

[0057] Step A1, first determine the stiffness of the basin-shaped metal rubber and the compression spring, pass a spring washer, a basin-shaped metal rubber, a soft iron sheet and a magneto-rheological elastomer from one end of the small-diameter section of the support rod, adhere the conical magneto-rheological elastomer to the top circular table part of the support rod, and connect the middle spacer and the support rod together through threads;

[0058] Step A2, the same spring washer, basin-shaped metal rubber, soft iron sheet and magneto-rheological elastomer are sleeved below the middle spacer, and the compression spring, the upper metal rubber washer and the lower metal rubber washer are arranged on one side of the bottom surface of the basin-shaped metal rubber through the two ends of the support rod.

[0059] Step A3, the damper outer sleeve passes through the top surface of the support rod through the large diameter section of the hole; the shell passes through the bottom surface of the hole from the top of the damper outer sleeve, and the lower surface of the shell and the lower metal rubber pad are flush;

[0060] Step A4, uniformly winding the electromagnetic coil in the coil holder, the coil holder is set outside the damper outer sleeve and inside the shell through the middle hole, the end cap and the shell are fixed by screws, and the electromagnetic coil is led out to the outside of the damping device and connected with the controller through the lead hole;

[0061] Step A5, the annular magnetorheological elastomer is adhered to the inner convex surface of the magnetorheological elastomer protective cover and is set outside the shell, the magnetorheological elastomer protective cover is connected with the shell through the mounting hole; the top plate is connected with the annular magnetorheological elastomer and the conical magnetorheological elastomer through adhesion, and the damping device is connected with the top plate through bolts.

[0062] The working method of the magnetorheological elastomer damping device based on the basin-shaped metal rubber, using the magnetorheological elastomer damping device based on the basin-shaped metal rubber described above, characterized in that: the working method comprises a small vibration working condition method and a large vibration working condition method;

[0063] The small vibration working condition method is specifically: in the working process, when the damping device is subjected to vibration lower than the threshold value, the acceleration sensor collects the vibration signal when the top plate moves and transmits it to the controller, the controller does not power the electromagnetic coil, and the damping device relies on the compensation mechanism formed by the basin-shaped metal rubber damper to achieve the damping effect. In this working condition, the magnetorheological elastomer in the damping device has the mechanical properties of ordinary rubber elastomer, the force is transmitted to the annular magnetorheological elastomer and the conical magnetorheological elastomer through the top plate, the force transmitted to the annular magnetorheological elastomer is consumed by the self-damping of the annular magnetorheological elastomer; the force transmitted to the conical magnetorheological elastomer drives the middle pad through the support rod to consume its energy in longitudinal displacement, at this time, the damping effect of the magnetorheological body and the basin-shaped metal rubber itself set on the support rod, the elastic effect of the compression spring located in the middle groove of the upper metal rubber pad and the lower metal rubber pad, and the basin-shaped metal rubber damping device cooperate to absorb the energy transmitted by the vibration;

[0064] When the power supply is interrupted, the magnetorheological elastomer damping device based on the basin-shaped metal rubber works using the small vibration working condition method;

[0065] The large vibration working condition method specifically comprises the following steps: when the vibration of the damping device is greater than a threshold value in working, the acceleration sensor collects vibration signals when the top plate moves and transmits the vibration signals to the controller, the controller receives and processes the signals and controls the output of the current on the electromagnetic coil, so that the electromagnetic coil generates a magnetic field; the magnetic field strength in the magnetorheological elastomer is increased through the layout of the electromagnetic coil and the structure made of magnetic conductive material which enables the magnetic induction lines of the electromagnetic coil to pass through; when the top plate moves in this working condition, the annular magnetorheological elastomer and the conical magnetorheological elastomer are compressed, so that the former works in a shear mode and the latter works in an extrusion mode; the conical magnetorheological elastomer drives the support rod and the middle spacer to move longitudinally in the damper sleeve, and the compression of the basin-shaped metal rubber and the compression spring also drives the soft iron sheet to compress the magnetorheological elastomer, thereby achieving the damping effect; in this working condition, the stiffness of the magnetorheological elastomer changes with the magnetic field strength in the elastomer, that is, changes with the current, so that the damping device achieves a wider active damping frequency band of the vibration frequency.

[0066] Embodiment:

[0067] Reference drawings Figures 1-5 A magnetorheological elastomer damping device based on a basin-shaped metal rubber, comprising a top plate 1 connected with a damping device, a conical slot hole is formed in the middle of the top plate, the conical slot hole is connected with a conical magnetorheological elastomer 2 through adhesion, the top plate is connected with an annular magnetorheological elastomer 3 through adhesion, the lower surface of the annular magnetorheological elastomer is connected with a magnetorheological elastomer protective cover 4 through adhesion, the magnetorheological elastomer protective cover is connected with a shell 6 through bolts, a coil holder 5 for winding an electromagnetic coil is arranged in the shell, the top of the shell is connected with an end cover 7 through screws, the top plate, the coil holder and the end cover are all provided with lead holes, the electromagnetic coil is connected with a controller 10 through leads, and a basin-shaped metal rubber damper 8 is fixed in the coil holder.

[0068] In this embodiment, the basin-shaped metal rubber damper 8 comprises a damper sleeve 801, an upper metal rubber gasket 802, a support rod 803, a magnetorheological elastomer 804, a soft iron sheet 805, a middle spacer 806, a lower metal rubber gasket 807, a compression spring 808, a basin-shaped metal rubber 809 and a spring gasket 810.

[0069] In this embodiment, the damper sleeve 801 is fixed in the middle of the coil holder 5.

[0070] In this embodiment, the top of the support rod 803 is connected with the conical magnetorheological elastomer 2 through adhesion, so as to ensure that the conical magnetorheological elastomer 2 works in a shear mode.

[0071] In this embodiment, the middle spacer 806 is connected with the support rod 803 through threads.

[0072] In the embodiment, two pieces of magneto-rheological elastomer 804 are arranged between the basin-shaped metal rubber 809 and the middle spacer 806, and a piece of soft iron sheet 805 is arranged between two adjacent pieces of the magneto-rheological elastomer 804.

[0073] In the embodiment, grooves are arranged in the middle of the upper metal rubber spacer 802 and the lower metal rubber spacer 807, and the compression spring 808 is arranged in the grooves to provide pre-tightening force.

[0074] In the embodiment, the spring spacer 810 is sleeved in the concave part of the basin-shaped metal rubber through a small-diameter section of the support rod 803.

[0075] In the embodiment, the top plate 1, the shell 6, the shock absorber outer sleeve 801, the support rod 803, the middle spacer 806, the lower metal rubber spacer 807 and the spring spacer 810 are all made of magnetic conductive material.

[0076] In the embodiment, the magneto-rheological elastomer protective cover 4, the end cover 7, the upper metal rubber spacer 802 and the compression spring 808 are all made of non-magnetic conductive material.

[0077] The working method of the magneto-rheological elastomer shock absorber device based on the basin-shaped metal rubber is as follows: first, the stiffness of the basin-shaped metal rubber 809 and the compression spring 808 is determined, a spring spacer 810, a basin-shaped metal rubber 809, a soft iron sheet 805 and a magneto-rheological elastomer 804 are passed through a small-diameter end of a support rod 803, a conical magneto-rheological elastomer 2 is adhered to a top circular table part of the support rod 803, a middle spacer 806 and the support rod 803 are connected together through threads, a spring spacer 810, a basin-shaped metal rubber 809, a soft iron sheet 805 and a magneto-rheological elastomer 804 are sleeved below the middle spacer, a compression spring 808, an upper metal rubber spacer 802 and a lower metal rubber spacer 807 are arranged on one side of a bottom surface of the basin-shaped metal rubber 809 through two ends of the support rod 803, a shock absorber outer sleeve 801 is passed through a large-diameter section of the support rod 803 from a top surface through-hole, a shell 6 is passed through a bottom surface through-hole from a top part of the shock absorber outer sleeve 801, a lower bottom surface of the shell 6 is flush with the lower metal rubber spacer 807, electromagnetic coils are uniformly wound in a coil holder 5, the coil holder 5 is sleeved outside the shock absorber outer sleeve 801 and inside the shell 6 through a middle through-hole, an end cover 7 and the shell 6 are fixed through screws, the electromagnetic coils are led out to the outside of the shock absorber device through lead holes and connected with a controller 10, an annular magneto-rheological elastomer 3 is adhered to a convex surface inside a magneto-rheological elastomer protective cover 4 and sleeved outside the shell 6, the magneto-rheological elastomer protective cover 4 is connected with the shell 6 through a mounting hole, a top plate 1 is connected with the annular magneto-rheological elastomer 3 and the conical magneto-rheological elastomer 4 through adhesion, and the shock absorber device is connected with the top plate 1 through bolts.

[0078] In the working process, when the vibration received by the damping device is small, the coil can not be powered or be powered off accidentally, and the damping device mainly relies on the compensation mechanism basin-shaped metal rubber damper 8 to achieve the damping effect. The magneto-rheological elastomer in the damping device has the mechanical properties of ordinary rubber elastomer. The force is transmitted to the annular magneto-rheological elastomer 3 and the conical magneto-rheological elastomer 4 through the top plate 1. The force transmitted to the annular magneto-rheological elastomer 3 is consumed by the damping of the annular magneto-rheological elastomer 3 itself. The force transmitted to the conical magneto-rheological elastomer 4 drives the middle gasket 806 to move longitudinally through the support rod 803. Due to the damping effect of the magneto-rheological body 804 and the basin-shaped metal rubber 809 set on the support rod 803 and the elastic effect of the compression spring 808 located in the upper metal rubber gasket 802 and the lower metal rubber gasket 807, the damping device absorbs the energy transmitted by the vibration.

[0079] In the working process, when the vibration received by the damping device is large, the acceleration sensor 11 collects the vibration signal when the top plate moves and transmits it to the controller 10. The controller receives and processes the signal and controls the output of the current on the electromagnetic coil, so that the electromagnetic coil generates a magnetic field. The coil layout and the magnetic induction line passing through the structure using magnetic conductive material increase the magnetic field strength in the magneto-rheological elastomer. When the top plate 1 moves, the annular magneto-rheological elastomer 3 and the conical magneto-rheological elastomer 4 are compressed, and the former works in shear mode and the latter works in extrusion mode. The conical magneto-rheological elastomer 4 drives the support rod 803 and the middle gasket 806 to move longitudinally in the damper sleeve 801, compresses the basin-shaped metal rubber 809 and the compression spring 808, and also drives the soft iron sheet 805 to compress the magneto-rheological elastomer 804 to achieve damping effect. Since the stiffness of the magneto-rheological elastomer changes with the magnetic field strength in the elastomer, which changes with the current, the damping device can achieve a wider active damping frequency band of the vibration frequency.

[0080] The above description is only a specific embodiment of the present application, which enables those skilled in the art to understand or implement the present application. Various modifications of these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. Magneto-rheological elastomer damping device based on a pot-shaped metal rubber, characterized in that: The application relates to a damping device, which comprises a top plate (1) connected with the damping device, a slot hole in the middle of the top plate is connected with a conical magnetorheological elastomer (2) through adhesion, a peripheral convex part of the top plate is connected with an annular magnetorheological elastomer (3) through adhesion, the lower surface of the annular magnetorheological elastomer is connected with a magnetorheological elastomer protective cover (4) through adhesion, a coil holder (5) with a winding coil is sleeved in the damping device shell, the winding coil is connected with a controller (10) through lead wires, and a basin-shaped metal rubber damper (8) is fixed in the coil holder; the controller is connected with an acceleration sensor (11) at the top plate; The basin-shaped metal rubber damper comprises a damper sleeve (801), an upper metal rubber gasket (802) arranged on the upper part of the inner cavity of the damper sleeve, a support rod (803) arranged on the central part of the inner cavity of the damper sleeve, a plurality of magnetorheological elastomers (804) arranged in the middle part of the inner cavity of the damper sleeve, a lower metal rubber gasket (807) arranged on the lower part of the inner cavity of the damper sleeve, and a plurality of basin-shaped metal rubbers (809) arranged on the upper part and the lower part of the inner cavity of the damper sleeve; The top and bottom of each magnetorheological elastomer is provided with a soft iron sheet (805); the upper part and the lower part of the support rod (803) are sleeved with compression springs (808) and spring gaskets (810); The upper part and the lower part of the inner cavity of the damper sleeve are provided with two basin-shaped metal rubbers, a middle gasket (806) is arranged between the two basin-shaped metal rubbers, and each magnetorheological elastomer is arranged between the basin-shaped metal rubber and the middle gasket; The inner wall of the inner cavity of the damper sleeve and the upper basin-shaped metal rubber are provided with the upper metal rubber gasket (802); the inner wall of the inner cavity of the damper sleeve and the lower basin-shaped metal rubber are provided with the lower metal rubber gasket (807); The middle part of the upper metal rubber gasket and the lower metal rubber gasket is provided with a groove for accommodating the compression spring, and the compression spring is arranged in the groove to provide a pre-tightening force.

2. The pot-shaped metal-rubber based magneto-rheological elastomer vibration damping device according to claim 1, characterized in that: The small-diameter sections of the upper part and the lower part of the support rod are sleeved with spring gaskets (810), so that the spring gaskets (810) are arranged in the concave parts of the two basin-shaped metal rubbers.

3. The pot-shaped metal-rubber based magneto-rheological elastomer damper device according to claim 1, characterized in that: The magnetorheological elastomer protective cover is connected with the bottom of the shell (6) through a fastener; the top of the shell is connected with an end cover (7) through a fastener; the damper sleeve is fixed in the middle of the coil holder; the top plate, the coil holder and the end cover are all provided with lead hole; The top plate, the shell, the damper sleeve, the support rod, the middle gasket, the lower metal rubber gasket and the spring gasket are all made of magnetically conductive materials; The magnetorheological elastomer protective cover, the end cover, the upper metal rubber gasket and the compression spring are all made of non-magnetic materials.

4. The pot-shaped metal-rubber based magneto-rheological elastomer damper device of claim 1, wherein: The top part of the support rod is connected with the conical magnetorheological elastomer in a manner of adhesion, so that the conical magnetorheological elastomer works in a shearing mode.

5. The pot-shaped metal-rubber based magneto-rheological elastomer damper device according to claim 3, characterized in that: The assembly method of the damping device comprises the following steps: Step A1, first, the stiffness of the basin-shaped metal rubber and the compression spring is determined, a spring gasket, a basin-shaped metal rubber, a soft iron sheet and a magnetorheological elastomer are passed through the small-diameter end of the support rod, the conical magnetorheological elastomer is adhered to the top circular table part of the support rod, and the middle gasket and the support rod are connected together through threads; Step A2, the same spring washer, basin-shaped metal rubber, soft iron sheet and magnetorheological elastomer are sleeved below the middle gasket, and the compression spring, upper metal rubber washer and lower metal rubber washer are arranged on one side of the bottom surface of the basin-shaped metal rubber through the two ends of the support rod; Step A3, the damper outer sleeve passes through the top hole from the large-diameter section of the support rod; the shell passes through the bottom hole from the top of the damper outer sleeve, and the lower bottom surface of the shell is flush with the lower metal rubber washer; Step A4, the electromagnetic coil is uniformly wound in the coil holder, the coil holder is sleeved outside the damper outer sleeve and inside the shell through the middle hole, the end cap and the shell are fixed through the screw, and the electromagnetic coil is led out to the outside of the damping device and connected with the controller through the lead hole; Step A5, the annular magnetorheological elastomer is adhered to the inner convex surface of the magnetorheological elastomer protection cover and then sleeved outside the shell, the magnetorheological elastomer protection cover is connected with the shell through the mounting hole, and the top plate is connected with the annular magnetorheological elastomer and the conical magnetorheological elastomer through adhesion, and the damping device is connected with the top plate through the bolt.

6. Method for operating a pot-shaped metal-rubber based magneto-rheological elastomer vibration damping device, using a pot-shaped metal-rubber based magneto-rheological elastomer vibration damping device according to claim 3, characterized in that The working method includes a small vibration working condition method and a large vibration working condition method; The small vibration working condition method is specifically as follows: in the working process, when the vibration received by the damping device is lower than the threshold value, the acceleration sensor collects the vibration signal when the top plate moves and transmits the vibration signal to the controller, the controller does not electrify the electromagnetic coil, the damping device relies on the compensation mechanism formed by the basin-shaped metal rubber damper to realize the damping effect, in this working condition, the magnetorheological elastomer in the damping device has the mechanical properties of ordinary rubber elastomer, the force is transmitted to the annular magnetorheological elastomer and the conical magnetorheological elastomer through the top plate, the force transmitted to the annular magnetorheological elastomer is consumed by the self-damping of the annular magnetorheological elastomer; the force transmitted to the conical magnetorheological elastomer drives the middle gasket through the support rod to consume the energy in the longitudinal displacement motion, at this time, the magnetorheological elastomer and the basin-shaped metal rubber themselves have the damping effect, the compression spring in the middle groove of the upper metal rubber washer and the lower metal rubber washer has the elastic effect, and the basin-shaped metal rubber damping device cooperates to absorb the energy transmitted by the vibration; When the power supply is interrupted, the magnetorheological elastomer damping device based on the basin-shaped metal rubber works in the small vibration working condition method. The large vibration working condition method specifically comprises the following steps: when the damping device is subjected to vibration greater than a threshold value in operation, the acceleration sensor collects vibration signals when the top plate moves and transmits the vibration signals to the controller, the controller receives and processes the signals and controls the output of the current on the electromagnetic coil, so that the electromagnetic coil generates a magnetic field; the magnetic field strength in the magnetorheological elastomer is increased by the electromagnetic coil middle layout and the structure made of magnetic conductive material that can make the magnetic induction lines of the electromagnetic coil pass through; when the top plate moves in this working condition, the annular magnetorheological elastomer and the conical magnetorheological elastomer are compressed, so that the working mode of the former is shearing and the working mode of the latter is extrusion; the conical magnetorheological elastomer drives the support rod and the middle gasket to move longitudinally in the damper sleeve, and the compression of the basin-shaped metal rubber and the compression spring also drives the soft iron sheet to compress the magnetorheological elastomer, thereby achieving the damping effect; in this working condition, the stiffness of the magnetorheological elastomer changes with the magnetic field strength in the elastomer, that is, changes with the current, so that the damping device achieves a wider active damping frequency band of vibration frequencies.

Images