An electrorheological damper with a liquid inertia unit

Abstract

The present invention discloses an electrorheological damper with a liquid inertance, which relates to the technical field of vibration isolation and suppression. It includes a liquid inertance module and a giant electrorheological damping module arranged coaxially. The liquid inertance module and the giant electrorheological damping module are connected by studs. The liquid inertance module can generate an inertial effect and drive the shear of the giant electrorheological fluid inside the giant electrorheological damping module to achieve a damping effect. The electrorheological damper with a liquid inertance provided by the present invention integrates the characteristics of an inertance element, realizes good low-frequency vibration isolation performance, and at the same time, by introducing a giant electrorheological fluid, the damping force of the damper can be adjusted online by changing the external voltage, greatly improving the broadband vibration isolation performance of the damper.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration isolation and suppression, and particularly to an electrorheological damper with a liquid inertance. Background Art

[0002] Most of the currently applied dampers are hydraulic dampers, which generate damping force by the energy consumption of the damping fluid flowing through the throttle hole, and the damping coefficient of the damper can also be adjusted by changing the aperture of the throttle hole. However, the response of the hydraulic damper to external vibration loads is passive, which will inevitably reduce the buffering performance and damping effect of the damper. In view of the deficiencies of the hydraulic damper structure, an electromagnetic damper structure using electrorheological fluid has been developed, but the existing electromagnetic damper has a single principle for realizing the damping force and it is not easy to adjust the damping magnitude. Summary of the Invention

[0003] The purpose of the present invention is to provide an electrorheological damper with a liquid inertance to solve the problems existing in the above-mentioned prior art, integrate the characteristics of the elements with inertance, achieve good low-frequency vibration isolation performance, and at the same time, by introducing giant electrorheological fluid, the on-line adjustment of the damping force of the damper can be realized by changing the external voltage, which greatly improves the broadband vibration isolation performance of the damper.

[0004] To achieve the above purpose, the present invention provides the following solution:

[0005] The present invention provides an electrorheological damper with a liquid inertance, which includes a coaxially arranged liquid inertance module and a giant electrorheological damping module. The liquid inertance module and the giant electrorheological damping module are connected by studs. The liquid inertance module and the giant electrorheological damping module are two monomers, and flange plates are used for cooperation between the two monomers and are fixedly connected by studs; the connection method is not specifically limited. For example, a horizontal extension flange can also be provided at the bottom of the liquid inertance module, and an end face groove can be provided at the top of the giant electrorheological damping module. When the two are connected, the horizontal extension flange is arranged in the end face groove and the two are fixedly connected by studs; or the horizontal extension flange abuts against the bottom surface of the end face groove and is fixed by studs; the liquid inertance module can generate an inertial effect and at the same time drive the shear of the giant electrorheological fluid inside the giant electrorheological damping module to achieve the damping effect.

[0006] Optionally, the liquid inertia capacitance module includes a hydraulic cylinder and a hydraulic cylinder cover fixedly and sealingly connected. A piston rod passes through the hydraulic cylinder and the hydraulic cylinder cover. A piston fixedly arranged on the piston rod is located inside the hydraulic cylinder, and a sealing gasket in sealing contact with the inner wall of the hydraulic cylinder is sleeved circumferentially on the piston. The piston can divide the interior of the hydraulic cylinder into an upper chamber and a lower chamber. A spiral pipe is wound around the outside of the hydraulic cylinder. The upper port of the spiral pipe is fixedly and sealingly communicated with the upper chamber of the hydraulic cylinder through a locking nut, and the lower port of the spiral pipe is fixedly and sealingly communicated with the lower chamber of the hydraulic cylinder through a locking nut.

[0007] Optionally, the hydraulic cylinder cover is fixedly connected to the hydraulic cylinder by threads, and a rubber pad is provided between the hydraulic cylinder cover and the hydraulic cylinder.

[0008] Optionally, the giant electro-rheological damping module includes a damping chamber housing for containing giant electro-rheological fluid. The top of the damping chamber housing is fixedly and sealingly connected to the outer edge of the bottom of the hydraulic cylinder. A bottom of the damping chamber housing is fixedly and sealingly connected to an electrode plate seat, and an annular electrode is fixedly inserted on the electrode plate seat. The annular electrode is located inside the damping chamber housing. An annular shear plate is inserted between the annular electrodes. The annular shear plate is an insulating plate structure with holes in the circumferential direction. A connecting seat is fixedly provided at the top of the annular shear plate. The bottom of the piston rod passes through the bottom of the hydraulic cylinder and is fixedly connected to the connecting seat.

[0009] Optionally, the bottom of the piston rod is fixedly connected to the connecting seat by threads, and the annular shear plate is fixedly connected to the connecting seat by studs.

[0010] Optionally, the bottom of the damping chamber housing is fixedly and sealingly connected to the electrode plate seat by studs, and a rubber ring is provided between the bottom of the damping chamber housing and the electrode plate seat.

[0011] Optionally, the main body of the electrode plate seat is a frustum-shaped structure. A plurality of coaxial annular grooves are provided at the top of the electrode plate seat. The annular electrodes are inserted into the annular grooves. At the bottom of each circle of the annular grooves, notches matching the bumps at the bottom of the annular electrodes are provided. The notches on the same side are penetrated by horizontally arranged wire holes, and wires are arranged in the wire holes to supply power to the annular electrodes.

[0012] Optionally, the annular shear plate is a cylindrical shell structure with an open bottom. Threaded holes for connecting to the connecting seat are provided on the top plane of the annular shear plate. Exhaust grooves for exhausting air are provided circumferentially at the top of the annular shear plate. Two groups of shear notches are provided circumferentially at the bottom of the annular shear plate to shear the chain-like giant electro-rheological fluid after applying a high-voltage electric field, thereby generating a damping force.

[0013] Optionally, the annular shear plate is made of a non-metallic material, or the annular shear plate is made of a metal plate that has been painted for insulation treatment.

[0014] Optionally, the annular shear plate includes a first annular shear plate and a second annular shear plate with the same structure, and the first annular shear plate is sleeved outside the second annular shear plate.

[0015] The present invention has achieved the following technical effects compared with the prior art:

[0016] The structure of the present invention is simple. By introducing the liquid inertance effect, first, it avoids the mechanical wear that is prone to occur in traditional mechanical inertance devices, and second, it avoids the problem that the motion conversion effect of the mechanical structure is poor under high-frequency excitation, resulting in an insignificant inertance effect. By introducing the giant electro-rheological effect, the damping force of the damper can be adjusted in real time and online. The introduction of the inertance effect achieves better low-frequency vibration isolation performance, and the online adjustability of the damping force achieves better broadband vibration isolation performance, greatly expanding the vibration isolation scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 is a three-dimensional schematic diagram of the electro-rheological damper with liquid inertance of the present invention;

[0019] Figure 2 is a front view of the electro-rheological damper with liquid inertance of the present invention;

[0020] Figure 3 is a sectional schematic diagram of the electro-rheological damper with liquid inertance of the present invention;

[0021] Figure 4 is a sectional schematic diagram of the liquid inertance module of the present invention;

[0022] Figure 5 is a three-dimensional schematic diagram of the liquid inertance module of the present invention;

[0023] Figure 6 is a cross-sectional view of the giant electro-rheological damping module of the present invention;

[0024] Figure 7 is a front view of the electrode plate seat of the present invention;

[0025] Figure 8 is of the present invention Figure 7 sectional schematic diagram in the direction of B-B;

[0026] Figure 9 This is the perspective view of the electrode plate seat of the present invention;

[0027] Figure 10 This is the front view of the annular electrode plate of the present invention;

[0028] Figure 11 This is the perspective view of the annular electrode plate of the present invention;

[0029] Figure 12 This is the perspective view of the cooperation between the electrode plate seat and the annular electrode of the present invention;

[0030] Figure 13 This is the front view of the annular shear plate of the present invention;

[0031] Figure 14 This is the perspective view of the annular shear plate of the present invention;

[0032] Figure 15 This is the combined sectional view of the annular shear plate of the present invention;

[0033] Description of reference numerals: 1 - liquid inertia module, 101 - piston rod, 102 - hydraulic cylinder cover, 103 - rubber pad, 104 - spiral pipeline, 105 - hydraulic cylinder, 106 - locking nut, 2 - giant current - variable damping module, 201 - damping cavity housing, 202 - electrode plate seat, 202a - annular groove, 202b - notch, 202c - wire - passing hole, 203 - rubber ring, 204 - annular electrode, 205 - annular shear plate, 205a - first annular shear plate, 205b - second annular shear plate, 206 - connecting seat. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] The purpose of the present invention is to provide a current - variable damper with liquid inertia to solve the problems existing in the above - mentioned prior art. It combines the characteristics of elements with inertia, realizes good low - frequency vibration isolation performance, and at the same time, by introducing giant current - variable fluid, the damping force of the damper can be adjusted online by changing the external voltage, greatly improving the broadband vibration isolation performance of the damper.

[0036] To make the above - mentioned objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the drawings and specific implementation manners.

[0037] Electrorheological fluid is an intelligent material whose rheological properties change with the electric field. It is a complex fluid formed by dispersing particles with high dielectric constant and low conductivity between the micro and nano scales in an insulating base fluid with low dielectric constant. Without an external electric field, the particles are randomly distributed in the insulating base fluid. At this time, it can be seen that the electrorheological fluid has good fluidity and exhibits the properties of a Newtonian fluid in terms of the physical properties of the material. When an external electric field is applied to the electrorheological fluid, the dispersed phase particles are polarized. After polarization, the particles are closely arranged in an ordered chain or columnar arrangement. At this time, the electrorheological fluid will become a solid-like anti-shear ability and exhibit the properties of a Bingham fluid in terms of the physical properties of the material. It is found that the shear strength of the giant electrorheological fluid changes linearly with the applied electric field, rather than the usual quadratic relationship. When the applied electric field is removed, the electrorheological fluid will regain its fluidity as a liquid. Traditional electrorheological fluids have small yield stress and are prone to sedimentation. Therefore, traditional electrorheological fluids cannot meet the requirements of engineering applications in terms of their material properties. By adjusting the working voltage to change the viscosity of the electrorheological fluid, stepless control of the damping force can be achieved, thereby achieving the purpose of controlling the magnitude of the damping force, reducing the system transfer rate, and changing the energy consumption efficiency of the device.

[0038] Different from traditional mass elements (single-end inertial elements), the output force of an inertance is related to the relative acceleration between its two end points. The ratio of its output force to the relative acceleration between the two ends is called the inertance coefficient. Compared with traditional mass elements, the advantages of inertance elements are as follows: when adjusting the structural inertia characteristics, it is not limited to single-end connection (such as the suspension of tuned mass dampers, etc.), and can also adopt the same interlayer installation method as ordinary energy dissipators. In this way, the purpose of changing the structural inertia and tuning can be achieved more flexibly and effectively. From the existing inertance devices, the generated inertance coefficient can be much larger than its own physical mass, that is, the inertance can adjust the inertial characteristics without basically changing the physical mass of the structure, significantly reducing the natural frequency of the system. Since the inertance, spring, and energy dissipating device correspond to the mass term, stiffness term, and damping term of the dynamic equation respectively, this constitutes a complete dynamic system. The inertance can also be realized through a hydraulic mechanism. A spiral pipe is arranged outside the hydraulic cylinder. When the piston moves in the cylinder, it will drive the liquid in the cylinder to pass through the peripheral spiral pipe. Since the diameter of the pipe is much smaller than the diameter of the cylinder body, the fluid velocity in the pipe is amplified compared with the piston velocity. The inertance coefficient of this device can be further amplified by enlarging the piston area or reducing the cross-sectional area of the channel.

[0039] Based on the above content, the present invention provides an electrorheological damper with a liquid inertance, which is based on the liquid inertia effect and the giant electrorheological shear effect, referring to Att Figure 1 、Att Figure 2 、Att Figure 3 、Att Figure 4 、Att Figure 5, attached Figure 6 , attached Figure 7 , attached Figure 8 , attached Figure 9 , attached Figure 10 , attached Figure 11 , attached Figure 12 , attached Figure 13 , attached Figure 14 and attached Figure 15 As shown in Figure 15 , it includes a liquid inertia unit module 1 and a giant electro-rheological damping module 2 arranged coaxially. The liquid inertia unit module 1 and the giant electro-rheological damping module 2 are two monomers. The two monomers are arranged in cooperation with a flange and fixedly connected by a stud. The connection method is not specifically limited. For example, a horizontal extended flange may be provided at the bottom of the liquid inertia unit module 1, and an end face groove may be provided at the top of the giant electro-rheological damping module 2. When the two are connected, the horizontal extended flange is arranged in the end face groove and the two are fixedly connected by a stud. The present invention integrates the characteristics of an inertia element, achieving good low-frequency vibration isolation performance. At the same time, by introducing giant electro-rheological fluid, the damping force of the damper can be adjusted online by changing the external voltage, greatly improving the broadband vibration isolation performance of the damper. The inertia effect of the damper is achieved through a hydraulic mechanism. A spiral pipe is arranged around the hydraulic cylinder. When the piston moves in the cylinder, it will drive the liquid in the cylinder through the peripheral spiral pipe. The inertia coefficient of the device can be further amplified by enlarging the piston area or reducing the channel cross-sectional area. The damping adjustment effect of the damper is achieved through the giant electro-rheological effect. After applying a high-voltage electric field, the giant electro-rheological fluid generates a chain effect. The generation of damping force can be achieved by destroying the chain structure. By adjusting the high-voltage electric field strength, the thickness of the giant electro-rheological fluid chain can be adjusted, so as to achieve the effect of online adjustable damping force.

[0040] Specifically, the liquid inertia unit module 1 includes a piston rod 101, a hydraulic cylinder cover 102, a rubber gasket 103, a spiral pipe 104, a hydraulic cylinder 105, and a lock nut 106. A sealing washer is sleeved around the piston in the piston rod 101 for the purpose of isolating the upper and lower cavities of the hydraulic cylinder. The hydraulic cylinder cover 102 is used to seal the hydraulic cylinder 105, and it is connected to the hydraulic cylinder 105 by a thread, and a rubber gasket 103 is used for sealing between the two. The spiral pipe 104 is wound around the hydraulic cylinder 105, and the ports at both ends of the spiral pipe 104 are respectively connected to the upper and lower cavities of the hydraulic cylinder 105. The lock nut 106 serves to lock and seal between the ports of the spiral pipe 104 and the upper and lower cavities of the hydraulic cylinder 105.

[0041] The giant electro-rheological damping module 2 includes a damping chamber housing 201, an electrode plate seat 202, a rubber ring 203, an annular electrode 204, an annular shear plate 205, and a connecting seat 206. The damping chamber housing 201 is used to hold the giant electro-rheological fluid. The electrode plate seat 202 can serve as the base of the entire damper. It is fixedly connected to the bottom of the damping chamber housing 201 by studs. And a rubber ring 203 is provided at the connection position between the bottom of the damping chamber housing 201 and the electrode plate seat 202 to achieve a sealing effect. There is a circular slot on the electrode plate seat 202 for fixing the annular electrode 204, and there are wire holes for supplying power to the annular electrode. The annular shear plate 205 is a non-metallic material with holes in the circumferential direction, or it can be a metal material treated with paint insulation. The connecting seat 206 is used to connect the piston rod 101 and the annular shear plate 205. The piston rod 101 is threadedly connected to the connecting seat 206, and the annular shear plate 205 is connected to the connecting seat 206 by studs. It should be particularly noted that since the volume of the damping chamber will change during the movement of the piston rod 101, a certain air space margin needs to be left when injecting the giant electro-rheological fluid into the damping chamber, so as to realize air compression and expansion during the movement of the piston rod 101 and reduce its influence on the damping force.

[0042] The main body of the electrode plate seat 202 is frustum-shaped and cooperates with the damping chamber housing 201. There is an annular groove 202a on the frustum for inserting the annular electrode. At the bottom of each circle of the annular groove 202a, there are notches 202b that cooperate with the bottom bumps of the annular electrode. There are wire holes 202c penetrating between the notches on the same side for running wires to supply power to the annular electrode. In this embodiment, three annular electrodes are arranged, and positive-negative-positive high voltages are sequentially applied to them, which can form two high-voltage electric fields in the damping chamber, causing the giant electro-rheological fluid contained in the damping chamber to produce a giant electro-rheological effect and form a chain structure.

[0043] The annular electrode 204 is integrally circular. Three notches are circumferentially opened at the bottom of the annular electrode 204 to maintain the fluidity of the electro-rheological fluid after the annular electrode 204 applies an electric field, and at the same time to ensure that the generation of the damping force is completely caused by the notches on the annular shear plate 205, so as to realize the precise adjustment of the damping force through the change of voltage. There is a boss on the lower bottom surface of the annular electrode 204, and there is a round hole on the boss. This boss is used to cooperate with the notch 202b on the electrode plate seat 202, and the round hole on the boss cooperates with the wire hole 202c to apply a voltage to the annular electrode plate.

[0044] The annular shear plate 205 is a cylindrical shell as a whole, and there are threaded holes on the top plane of the shell for connection. At the same time, there are exhaust grooves for exhaust on the top circumference of the shell to ensure that the annular shear plate 205 can be discharged in time if the enclosed gas is generated when it moves. There are two sets of shear notches on the bottom circumference of the shell to shear the giant electrorheological fluid that is chained after the high-voltage electric field is applied, so as to generate damping force. The material of the annular shear plate 205 needs to be insulating, which can be a non-metallic material or a metal plate after being treated with spray paint insulation. In this embodiment, the first annular shear plate 205a and the second annular shear plate 205b are set to form a combination that corresponds to the two high-voltage electric fields generated by the annular electric field.

[0045] During the damper operation, the piston in the piston rod 101 generates an inertial effect by squeezing the hydraulic oil in the hydraulic cylinder to make it flow through the external spiral circuit. At the same time, the piston rod 101 drives the annular shear plate 205 to move vertically to shear the giant electrorheological fluid and achieve a damping effect.

[0046] In the description of the present invention, it should be noted that the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0047] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An electrorheological damper with liquid inertia, Features: The invention comprises a coaxially arranged liquid inertia module and a giant electrorheological damping module, wherein the liquid inertia module and the giant electrorheological damping module are connected via a stud; the liquid inertia module can produce an inertia effect, and at the same time drive the giant electrorheological liquid inside the giant electrorheological damping module to be sheared to achieve a damping effect; the liquid inertia module comprises a hydraulic cylinder and a hydraulic cylinder head fixedly and sealedly connected, a piston rod is passed through the hydraulic cylinder and the hydraulic cylinder head, a piston fixedly arranged on the piston rod is located in the hydraulic cylinder, and a sealing gasket is circumferentially sleeved on the piston that is in sealing contact with the inner wall of the hydraulic cylinder, and the piston can separate the interior of the hydraulic cylinder into an upper chamber and a lower chamber; a spiral pipe is wound around the outside of the hydraulic cylinder, and a port at the upper end of the spiral pipe is passed through the hydraulic cylinder. The spiral pipe is fixedly and sealedly connected to the upper chamber of the hydraulic cylinder through a locking nut, and the port at the lower end of the spiral pipe is fixedly and sealedly connected to the lower chamber of the hydraulic cylinder through a locking nut; the giant electrorheological damping module includes a damping chamber shell for containing giant electrorheological fluid, the top of the damping chamber shell is fixedly and sealedly connected to the outer edge of the bottom of the hydraulic cylinder, the bottom of the damping chamber shell is fixedly and sealedly connected to an electrode plate seat, an annular electrode is fixedly inserted on the electrode plate seat, and the annular electrode is located inside the damping chamber shell; an annular shear plate is inserted between the annular electrodes, and the annular shear plate is an insulating plate structure with circumferential holes; a connecting seat is fixedly provided on the top of the annular shear plate, and the bottom of the piston rod is fixedly connected to the connecting seat after passing through the bottom of the hydraulic cylinder.

2. The electrorheological damper with liquid inertia according to claim 1, Features: The hydraulic cylinder cover and the hydraulic cylinder are fixedly connected via threads, and a rubber pad is arranged between the hydraulic cylinder cover and the hydraulic cylinder.

3. The electrorheological damper with liquid inertia according to claim 1, Features: The bottom of the piston rod is fixedly connected to the connecting seat via threads, and the annular shear plate is fixedly connected to the connecting seat via studs.

4. The electrorheological damper with liquid inertia according to claim 1, Features: The bottom of the damping cavity shell is fixedly connected to the electrode plate seat via a stud, and a rubber ring is provided between the bottom of the damping cavity shell and the electrode plate seat.

5. The electrorheological damper with liquid inertia according to claim 1, Features: The main body of the electrode plate seat is a truncated cone structure, and a plurality of coaxial annular grooves are provided on the top of the electrode plate seat, and the annular electrodes are inserted into the annular grooves. A notch is provided at the bottom of each circle of the annular grooves, which cooperates with the protrusion at the bottom of the annular electrode. The plurality of notches on the same side are connected by horizontally arranged wiring holes, and the wiring holes are used to route wires to provide power to the annular electrodes.

6. The electrorheological damper with liquid inertia according to claim 1, Features: The annular shear plate is a cylindrical shell structure with an open bottom. A threaded hole for connecting with the connecting seat is provided on the top plane of the annular shear plate, and an exhaust groove for exhausting gas is provided circumferentially on the top of the annular shear plate; two groups of shear notches are provided circumferentially at the bottom of the annular shear plate for shearing the giant current-variable fluid formed into chains after applying a high-voltage electric field, so as to generate a damping force.

7. The electrorheological damper with a liquid inertance according to claim 6, wherein: the annular shear plate is made of a non-metallic material, or the annular shear plate is made of a metal plate after being subjected to spray painting insulation treatment.

8. The electrorheological damper with a liquid inertance according to claim 6, wherein: the annular shear plate comprises a first annular shear plate and a second annular shear plate with the same structure, and the first annular shear plate is sleeved outside the second annular shear plate.

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