Energy feedback type magnetorheological elastomer shock absorber for engine suspension

Abstract

The invention discloses an energy feedback type magneto-rheological elastomer shock absorber for engine suspension. The energy feedback type magneto-rheological elastomer shock absorber comprises a shell, a magnet exciting coil assembly, a magnet, a magneto-rheological elastomer, a magnetic conductive block and an iron core. The magnet and the magnet exciting coil jointly participate in the power generation process, the magnet provides a magnetic field, when the magnet exciting coil moves in the magnetic field, current is generated through the electromagnetic induction phenomenon, power generation is achieved, when the magnet exciting coil is powered on, due to the magneto-rheological effect, the magneto-rheological elastomer changes the performance, and the magneto-rheological elastomer becomes harder; due to the fact that the magnetic field intensity penetrating through the magneto-rheological elastomer varies along with the magnitude of the electrified current, the damping effect of the magneto-rheological elastomer changes along with the change of the current, the damping effect borne by the magneto-rheological elastomer in the working process is controllable, and if too much current is not used, the current is stored in the energy storage capacitor through the lead, and energy feedback is achieved.

Description

Technical Field

[0001] The invention relates to a shock absorber, in particular to an energy-feeding magnetorheological elastomer shock absorber for engine suspension, belonging to the technical field of vibration reduction equipment. Background Art

[0002] Generally speaking, the engine of the suspension system is an internal vibration source, and is also subject to various vibration interferences from the outside, causing damage to parts and uncomfortable rides, etc. Therefore, the suspension system is set to minimize the vibration transmitted from the engine to the support system.

[0003] Magnetorheological elastomer is a new type of intelligent material with high-tech features such as controllability, reversibility, and rapid response. It has the characteristics of adjustable damping, and can quickly respond to impact loads and absorb energy. It also has the unique advantage of good stability. This characteristic makes magnetorheological elastomer support systems widely used in automobiles, building structures, and industrial equipment, thereby providing effective shock absorption and vibration isolation. This material can not only be used for vibration reduction and noise reduction of vehicles such as automobiles, trains, and ships, but also has broad application prospects in basic fields such as aerospace, national defense, and transportation.

[0004] In the prior art, a damping adjustable engine suspension vibration reduction device is disclosed in the patent with publication number CN101285514A, which includes a main spring assembly and a base assembly, wherein the main spring assembly and the base assembly enclose a sealed cavity, and a vibration isolation mechanism of an upper liquid chamber and a lower liquid chamber is provided in the cavity, wherein the vibration isolation mechanism includes a pair of electrode assemblies connectable to a power source, an inertial channel body is fixed in the cavity, a channel is opened in the center of the inertial channel body, the electrode assembly fixes a channel body core in the channel, and forms a liquid passageway connecting the electrorheological fluid in the upper liquid chamber and the lower liquid chamber between the inertial channel body and the channel body core. When the engine vibrates, when the exciting force generated is directed downward, it is transmitted to the suspended elastic main spring through the connecting bolts. The elastic main spring is deformed by the force, compressing the volume of the upper liquid chamber. The volume of the upper liquid chamber decreases and the pressure increases, generating a pressure difference with the lower liquid chamber. The pressure presses the electrorheological fluid from the upper liquid chamber to the lower liquid chamber through the inertial channel. When the electrorheological fluid flows through the liquid passage of the vibration isolation mechanism, the electric field strength of the viscosity of the toroidal electrode is changed by controlling the power supply voltage, thereby changing the viscosity of the electrorheological fluid, that is, changing the damping of the electrorheological fluid, dissipating part of the vibration energy, and attenuating the exciting force of the engine. The electrorheological fluid flows into the lower liquid chamber, increasing the pressure of the lower liquid chamber. The pressure causes the bottom membrane to deform, the volume of the lower liquid chamber increases, and the air between the lower liquid chamber and the base is discharged through the vents on the base. The electrorheological fluid continues to flow from the upper liquid chamber to the lower liquid chamber until the pressure is balanced. The unattenuated force is transmitted to the base by the rubber main spring and then to the frame by the connecting bolts. Although the existing technology can achieve adjustable damping vibration reduction by changing the electric field strength of the viscosity of the toroidal electrode, thereby changing the viscosity of the electrorheological fluid, that is, changing the damping of the electrorheological fluid, when adjusting the electric field strength by changing the power supply, part of the electric energy will be lost, which will cause a large waste of energy. Summary of the invention

[0005] The purpose of the present invention is to provide an energy-feeding magnetorheological elastomer shock absorber for engine suspension in order to solve at least one of the above technical problems.

[0006] The present invention achieves the above-mentioned object through the following technical scheme: an energy-feeding magnetorheological elastomer shock absorber for engine suspension, comprising a housing, an excitation coil assembly, a magnet, a magnetorheological elastomer, a magnetic conductive block and an iron core, wherein the excitation coil assembly, the magnet, the magnetorheological elastomer and the iron core are all arranged in the housing; The excitation coil assembly is closely attached to the inner wall of the shell, the magnetorheological elastomer and the magnetic conductive block are stacked and placed at the center of the shell, the iron core is located directly above the magnetorheological elastomer, and the magnet is installed on the outer peripheral side wall of the iron core.

[0007] As a further solution of the present invention: the outer shell is composed of a cylindrical shell and a disc base, the cylindrical shell is integrally connected to the upper end of the disc base, and a plurality of threaded holes are opened on the outer circumference of the disc base.

[0008] As a further solution of the present invention: a top cover is connected to the top opening of the shell, a bolt is threadedly penetrated through the center of the top cover, a threaded hole is opened at the top center of the iron core, and one end of the bolt located in the shell is fixedly connected to the iron core thread.

[0009] As a further solution of the present invention: the excitation coil assembly includes a first excitation coil and a second excitation coil, and a magnetic isolation plate is arranged between the first excitation coil and the second excitation coil.

[0010] As a further solution of the present invention: three magnetorheological elastomers are provided, the magnetorheological elastomers and the magnetic conductive blocks are stacked and placed at the center of the base inside the shell, and the magnetorheological elastomers are located directly below the iron core. The material of the magnetorheological elastomers includes but is not limited to silicone rubber.

[0011] As a further solution of the present invention: two magnetic conductive blocks are provided, and the magnetic conductive blocks are sequentially filled between two adjacent magnetorheological elastomers.

[0012] As a further solution of the present invention: an energy storage capacitor is arranged on the outside of the shell, the power input end of the energy storage capacitor is connected to a lead, and the other end of the lead passes through the side wall of the shell and is electrically connected to the second excitation coil.

[0013] The beneficial effects of the present invention are: 1) An energy feeding device is used, and an excitation coil is placed inside the shell. The first excitation coil and the second excitation coil are separated by a magnetic isolation plate. A magnet is installed on the iron core above the magnetic isolation plate. When vibration occurs, the structure generates current. When the excitation coil is energized, the magnetorheological effect changes the performance of the magnetorheological elastomer, making it harder. Because the magnetic field strength passing through the magnetorheological elastomer varies with the size of the current, the damping effect of the magnetorheological elastomer also changes with the change of the current. Therefore, the damping effect of the magnetorheological elastomer during operation is controllable; 2) The energy feeding device can be used to effectively utilize the current. The energy storage capacitor is connected to the energy feeding device through a lead and releases the current when necessary. The magnetic field strength is changed by the size of the input current, thereby changing the performance of the magnetorheological elastomer and achieving the optimal effect of engine suspension vibration reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a cross-sectional view of an embodiment of the present invention; Figure 2 It is a schematic diagram of the structure when viewed from above in an embodiment of the present invention; Figure 3 is a schematic diagram of a top view of the structure in an embodiment of the present invention; Figure 4 It is a three-dimensional schematic diagram in an embodiment of the present invention.

[0015] In the figure: 1. bolts, 2. outer shell, 21. cylindrical shell, 22. disc base, 23. threaded hole, 3. top cover, 4. magnetic isolation plate, 5. first excitation coil, 6. second excitation coil, 7. magnet, 8. magnetorheological elastomer, 9. magnetic conductive block, 10. iron core, 11. lead wire, 12. energy storage capacitor. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] Embodiment 1, as Figures 1 to 4 As shown, an energy-feeding magnetorheological elastic body shock absorber for engine suspension includes a housing 2, an excitation coil assembly, a magnet 7, a magnetorheological elastic body 8, a magnetic conductive block 9 and an iron core 10, wherein the excitation coil assembly, the magnet 7, the magnetorheological elastic body 8 and the iron core 10 are all arranged in the housing 2; The excitation coil assembly is tightly attached to the inner wall of the shell 2, the magnetorheological elastomer 8 and the magnetic conductive block 9 are stacked and placed at the center of the shell 2, the iron core 10 is located directly above the magnetorheological elastomer 8, and the magnet 7 is installed on the outer peripheral side wall of the iron core 10. The magnet 7 provides a magnetic field, and when the excitation coil assembly moves in the magnetic field, it generates current through electromagnetic induction, thereby realizing power generation. When the excitation coil assembly is energized, the magnetorheological effect changes the performance of the magnetorheological elastomer 8 to make it harder. Because the magnetic field strength passing through the magnetorheological elastomer 8 varies with the size of the current, the damping effect of the magnetorheological elastomer 8 also changes with the change of the current. Therefore, the damping effect on the magnetorheological elastomer 8 during operation is controllable.

[0018] Embodiment 2. In addition to all the technical features of Embodiment 1, this embodiment also includes: the outer shell 2 is composed of a cylindrical shell 21 and a disc base 22. The cylindrical shell 21 is integrally connected to the upper end of the disc base 22. The outer circumference of the disc base 22 is provided with a plurality of threaded holes 23, which facilitate the fixing of the shell 2 to the base of the car through the threaded holes 23 to achieve stable support for the overall structure of the shock absorber.

[0019] A top cover 3 is connected to the top opening of the shell 2, and a bolt 1 is threadedly penetrated and connected to the center position of the top cover 3. A threaded hole is opened at the top center of the iron core 10, and one end of the bolt 1 located in the shell 2 is threadedly fixedly connected to the iron core 10, so that the shell 2 can be fixedly connected to the iron core 10 through the action of the bolt 1, and can be fixedly connected to the automobile engine through one end of the bolt 1 located above the shell 2, and the iron core 10 provided can play a supporting role; limit the diffusion of the magnetic field, reduce the loss of energy, thereby maintaining the efficiency and stability of the electromagnet; can change the direction of the magnetic field, make the magnetic field more stable and powerful, thereby improving the efficiency of the electromagnet; can limit the diffusion of the magnetic field, reduce the loss of energy, thereby maintaining the efficiency and stability of the electromagnet.

[0020] The excitation coil assembly includes a first excitation coil 5 and a second excitation coil 6. A magnetic isolation plate 4 is arranged between the first excitation coil 5 and the second excitation coil 6. The two excitation coils are separated by the magnetic isolation plate 4, so that the magnetic fields generated by the two excitation coils do not affect each other, thereby realizing independent control of the two excitation coils.

[0021] Embodiment 3. In addition to all the technical features of embodiment 1, this embodiment also includes: three magnetorheological elastomers 8 are provided, and the magnetorheological elastomers 8 and the magnetic conductive blocks 9 are stacked and placed at the center of the base inside the shell 2, and the magnetorheological elastomer 8 is located directly below the iron core 10. The material of the magnetorheological elastomer 8 includes but is not limited to silicone rubber. When the excitation coil is energized, the magnetorheological effect changes the performance of the magnetorheological elastomer 8 to make it harder. Because the magnetic field strength passing through the magnetorheological elastomer 8 varies with the size of the current, the damping effect of the magnetorheological elastomer 8 also changes with the change of the current, and the magnetorheological elastomer 8 can play a vertical buffering and vibration reduction role.

[0022] Two magnetic conductive blocks 9 are provided, and the magnetic conductive blocks 9 are sequentially filled between two adjacent magnetorheological elastomers 8. The magnetic conductive blocks 9 can concentrate the magnetic field around the excitation coil, enhance the electromagnetic induction effect, improve the power generation efficiency and output power, reduce magnetic leakage and energy loss, and improve the energy conversion efficiency.

[0023] An energy storage capacitor 12 is arranged on the outside of the shell 2, and the power input end of the energy storage capacitor 12 is connected to a lead 11. The other end of the lead 11 passes through the side wall of the shell 2 and is electrically connected to the second excitation coil 6. When the second excitation coil 6 generates current through electromagnetic induction to achieve power generation, if too much current is not needed, the electric energy can be stored in the energy storage capacitor 12 through the lead 11 to achieve energy feeding. This is the so-called application of energy-feeding magnetorheological elastomer.

[0024] The magnet 7 and the excitation coil jointly participate in the power generation process; the magnet 7 provides a magnetic field, and when the excitation coil moves in the magnetic field, it generates current through electromagnetic induction, thereby realizing power generation. When the excitation coil is energized, the magnetorheological effect causes the magnetorheological elastomer 8 to change its performance and become harder. Because the magnetic field strength passing through the magnetorheological elastomer 8 varies with the size of the current, the damping effect of the magnetorheological elastomer 8 also changes with the change of the current. Therefore, the damping effect on the magnetorheological elastomer 8 during operation is controllable. If too much current is not used, it can be stored in the energy storage capacitor 12 through the lead 11 to realize energy feeding, thereby realizing the application of the so-called energy-feeding magnetorheological elastomer.

[0025] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0026] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An energy-feeding magnetorheological elastic body shock absorber for engine suspension, comprising a housing (2), an excitation coil assembly, a magnet (7), a magnetorheological elastic body (8), a magnetic conductive block (9) and an iron core (10), characterized in that: The excitation coil assembly, the magnet (7), the magnetorheological elastomer (8) and the iron core (10) are all arranged in the housing (2); The excitation coil assembly is tightly attached to the inner wall of the housing (2); the magnetorheological elastomer (8) and the magnetic conductive block (9) are stacked and placed at the center of the housing (2); the iron core (10) is located directly above the magnetorheological elastomer (8); and the magnet (7) is mounted on the outer peripheral side wall of the iron core (10).

2. The energy-feeding magnetorheological elastic body shock absorber for engine suspension according to claim 1, characterized in that: The outer shell (2) is composed of a cylindrical shell (21) and a disc base (22); the cylindrical shell (21) is integrally connected to the upper end of the disc base (22); and a plurality of threaded holes (23) are provided on the outer circumference of the disc base (22).

3. The energy-feeding magnetorheological elastic body shock absorber for engine suspension according to claim 2, characterized in that: A top cover (3) is connected to the top opening of the outer shell (2), a bolt (1) is threadedly penetrated through the center of the top cover (3), a threaded hole is provided at the top center of the iron core (10), and one end of the bolt (1) located inside the outer shell (2) is threadedly fixedly connected to the iron core (10).

4. The energy-feeding magnetorheological elastic body shock absorber for engine suspension according to claim 3, characterized in that: The excitation coil assembly comprises a first excitation coil (5) and a second excitation coil (6), and a magnetic isolation plate (4) is provided between the first excitation coil (5) and the second excitation coil (6).

5. The energy-feeding magnetorheological elastic body shock absorber for engine suspension according to claim 4, characterized in that: Three magnetorheological elastomers (8) are provided. The magnetorheological elastomers (8) and the magnetic conductive blocks (9) are stacked and placed at the center of the base inside the housing (2). The magnetorheological elastomers (8) are located directly below the iron core (10). The material of the magnetorheological elastomers (8) includes but is not limited to silicone rubber.

6. The energy-feeding magnetorheological elastic body shock absorber for engine suspension according to claim 5, characterized in that: Two magnetic conductive blocks (9) are provided, and the magnetic conductive blocks (9) are sequentially placed between two adjacent magnetorheological elastomers (8).

7. The energy-feeding magnetorheological elastic body shock absorber for engine suspension according to claim 6, characterized in that: An energy storage capacitor (12) is arranged on the outside of the housing (2), an electric energy input end of the energy storage capacitor (12) is connected to a lead wire (11), and the other end of the lead wire (11) passes through the side wall of the housing (2) and is electrically connected to the second excitation coil (6).

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