A piezoelectric rubber electromagnetic integrated composite vibration isolation device

Abstract

The application relates to a piezoelectric rubber electromagnetic integrated composite vibration isolation device, which comprises a shell and a force transmission rod assembly, the shell is internally provided with an energy collection unit and multiple vibration isolation units, the lower end of the force transmission rod assembly is arranged in the shell, the upper end of the force transmission rod assembly is arranged to pass through the top of the shell, the multiple vibration isolation units comprise piezoelectric stack vibration isolation assemblies, rubber vibration isolation assemblies and electromagnetic vibration isolation assemblies, the rubber vibration isolation assemblies are arranged between the piezoelectric stack vibration isolation assemblies and the electromagnetic vibration isolation assemblies, the bottom end of the force transmission rod assembly is in abutment with the piezoelectric stack vibration isolation assemblies, and the energy collection unit is connected with the electromagnetic vibration isolation assemblies through wires. The device can absorb the energy generated by external vibration, thereby reducing the influence of vibration, meanwhile, part of the vibration energy is converted into electric energy, and the generated current is transmitted to the electromagnetic vibration isolation assemblies, so that the electromagnetic vibration isolation assemblies generate damping force in the direction opposite to the vibration direction, and the piezoelectric, rubber and electromagnetic vibration isolation is realized.

Description

Technical Field

[0001] This invention relates to the field of low-frequency vibration control, and also to a hybrid active-passive piezoelectric vibration isolation support based on a layered periodic structure. Background Technology

[0002] With the continuous discovery of new smart materials and the increasing improvement of processing and manufacturing technologies, intelligent actuators with small size, high actuation force, and high control precision, such as piezoelectric ceramic actuators, shape memory alloy actuators, electrovariable actuators, and magnetostrictive actuators, are receiving increasing attention and research. As the manufacturing process of intelligent actuators continues to improve and nonlinear controller technology becomes more sophisticated, intelligent actuators have even broader application prospects in the field of active vibration control.

[0003] Composite piezoelectric vibration isolators are composed of a piezoelectric actuator and a passive vibration isolator, which can give full play to the advantages of each. At present, composite piezoelectric vibration isolators mainly use appropriate passive vibration isolators and piezoelectric actuators separately in parallel or series. The main form is the series combination of piezoelectric actuators and rubber vibration isolators. However, separate composite piezoelectric vibration isolators have problems such as complicated installation and inconvenient use. At the same time, there is relatively little research on composite vibration isolation of piezoelectric actuators and electromagnetic vibration isolators.

[0004] To address this, the present invention designs an integrated composite vibration isolator that combines piezoelectric, rubber, and electromagnetic vibration isolation, which simplifies the installation process and effectively avoids the influence of the external environment on the vibration reduction effect of the composite vibration isolator during use. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a piezoelectric rubber electromagnetic integrated composite vibration isolation device. This device gives full play to the vibration isolation effects of piezoelectricity, rubber and electromagnetics, and can better reduce external vibrations and achieve stability of the vibration-damped equipment.

[0006] This invention is accomplished by the following technical solution: a piezoelectric rubber electromagnetic integrated composite vibration isolation device, comprising a housing and a force transmission rod assembly. The housing contains an energy harvesting unit and multiple vibration isolation units. The lower end of the force transmission rod assembly is placed inside the housing, and the upper end of the force transmission rod assembly extends out from the top of the housing. The multiple vibration isolation units include a piezoelectric stack vibration isolation assembly, a rubber vibration isolation assembly, and an electromagnetic vibration isolation assembly. The rubber vibration isolation assembly is disposed between the piezoelectric stack vibration isolation assembly and the electromagnetic vibration isolation assembly. The bottom end of the force transmission rod assembly abuts against the piezoelectric stack vibration isolation assembly. The energy harvesting unit is connected to the electromagnetic vibration isolation assembly via a wire.

[0007] Furthermore, the force transmission rod assembly includes a rod portion, a limiting plate, and a force transmission plate. A preloaded spring is sleeved on the rod portion, and the preloaded spring is located between the limiting plate and the housing. The force transmission plate is located at the bottom end of the rod portion and abuts against the piezoelectric stack vibration isolation assembly. The energy harvesting unit is inserted into the rod portion.

[0008] Furthermore, the energy harvesting unit includes a beam-type support assembly and multiple piezoelectric power generation components. The beam-type support assembly consists of two oppositely arranged insulating support members. The support members have a simply supported beam structure. The piezoelectric power generation components are respectively inserted into the two support members on both sides. The bottom of the support members extends to the housing of the electromagnetic vibration isolation assembly. The connecting wires between the energy harvesting unit and the electromagnetic vibration isolation assembly are arranged inside the support members.

[0009] Furthermore, the housing includes an upper cover plate and a body with a receiving cavity. The piezoelectric stack vibration isolation component, the rubber vibration isolation component, and the electromagnetic vibration isolation component are sequentially arranged in the body with the receiving cavity. A steel plate is provided at the bottom of the receiving cavity of the body. The steel plate corresponds to and is adapted to the electromagnetic vibration isolation component. A circular hole is provided at the center of the bottom of the body. An adjusting nut is adjustablely connected in the circular hole. The steel plate is located between the circular hole and the electromagnetic vibration isolation component.

[0010] Furthermore, the lower end of the piezoelectric stack vibration isolation component is connected to the upper end of the rubber vibration isolation component via an upper steel plate, and the lower end of the rubber vibration isolation component is connected to the upper end of the electromagnetic vibration isolation component via a lower steel plate.

[0011] Furthermore, the piezoelectric power generation component is composed of a piezoelectric ceramic sheet and a stainless steel sheet. The piezoelectric ceramic sheet is fixed on the stainless steel sheet, and both ends of the piezoelectric ceramic sheet and the stainless steel sheet are welded to one end of a wire. The other end of the wire is connected to the electromagnetic vibration isolation component.

[0012] Furthermore, a rectifier unit and an integrated circuit are arranged at both ends of the piezoelectric power generation component. The rectifier unit is a circuit board with a rectifier bridge. Multiple piezoelectric power generation components are respectively connected to the rectifier bridge on the circuit board through wires. The integrated circuit is an energy management chip, and the energy management chip is connected to the circuit board wires.

[0013] Furthermore, the piezoelectric stack vibration isolation assembly consists of multiple piezoelectric ceramic sheets and multiple copper foils. The copper foils are inserted between adjacent piezoelectric ceramic sheets. The piezoelectric stack vibration isolation assembly is welded to one end of a wire, and the other end of the wire is connected to an external piezoelectric ceramic controller through a housing.

[0014] Furthermore, the rubber vibration isolation assembly is composed of a single rubber component, which is fixed between the piezoelectric pile vibration isolation assembly and the electromagnetic vibration isolation assembly.

[0015] Furthermore, the electromagnetic vibration isolation assembly comprises a coil, a permanent magnet, and a force transmission rod. The coil is connected to the piezoelectric power generation assembly via a wire. The force transmission rod is fixed on the permanent magnet, which is fixed between the coils. The permanent magnet is connected to the adjusting nut via a spring and a steel plate.

[0016] In this invention, when external vibrations occur, the vibration energy is transmitted to the piezoelectric power generation component via the force transmission rod assembly, generating electrical energy to power the electromagnetic vibration isolation component. Simultaneously, the vibration energy is transmitted to the piezoelectric stack vibration isolation component via the force transmission plate, damping a portion of the vibration energy. The remaining vibration energy is then transmitted to the rubber vibration isolation component via the upper steel plate, further damping the remaining vibration energy. Finally, the vibration energy is transmitted to the electromagnetic vibration isolation component via the lower steel plate. The electromagnetic vibration isolation component receives electrical energy from the piezoelectric power generation component, thus achieving maximum vibration isolation. This fully utilizes the vibration isolation effects of piezoelectricity, rubber, and electromagnetism, effectively mitigating external vibrations and achieving maximum vibration isolation. Attached Figure Description

[0017] Figure 1 This is a schematic cross-sectional view of a composite vibration isolation device based on piezoelectric rubber and electromagnetic integration.

[0018] Figure 2 This is a schematic diagram of an energy harvesting unit structure based on a piezoelectric rubber electromagnetic integrated composite vibration isolation device;

[0019] Figure 3 This is a schematic diagram of a piezoelectric stack vibration isolation component based on a piezoelectric rubber electromagnetic integrated composite vibration isolation device;

[0020] Figure 4 This is a schematic diagram of a rubber vibration isolation component structure based on a piezoelectric rubber electromagnetic integrated composite vibration isolation device;

[0021] Figure 5 This is a schematic cross-sectional view of an electromagnetic vibration isolation component based on a piezoelectric rubber electromagnetic integrated composite vibration isolation device.

[0022] Labeling Explanation: 1. Housing; 2. Force Transmission Rod Assembly; 3. Energy Harvesting Unit; 4. Piezoelectric Stack Vibration Isolation Assembly; 5. Rubber Vibration Isolation Assembly; 6. Electromagnetic Vibration Isolation Assembly; 7. Upper Steel Plate; 8. Lower Steel Plate; 9. Adjusting Nut; 11. Upper Cover Plate; 12. Body; 13. Steel Plate; 14. Circular Hole; 15. Cable Outlet Hole; 21. Rod Section; 22. Limiting Plate; 23. Lower Force Transmission Plate; 24. Preload Spring; 31. Support Component; 32. Piezoelectric Ceramic Sheet; 33. Stainless Steel Sheet; 34. Processing Device; 41. Piezoelectric Ceramic Sheet; 42. Copper Foil; 43. Piezoelectric Ceramic Controller; 61. Coil; 62. Permanent Magnet; 63. Force Transmission Rod; 64. Spring; 65. Through Hole. Detailed Implementation

[0023] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0024] Reference Figure 1-5 As shown, this invention provides a piezoelectric rubber electromagnetic integrated composite vibration isolation device, including a housing 1 and a force transmission rod assembly 2. The housing 1 includes an upper cover plate 11 and a body 12 with a receiving cavity. The upper cover plate is fixed to the outer side of the body, and the body is composed of U-shaped steel plates. An energy harvesting unit 3 and multiple vibration isolation units are provided within the receiving cavity of the housing. The multiple vibration isolation units include a piezoelectric stack vibration isolation assembly 4, a rubber vibration isolation assembly 5, and an electromagnetic vibration isolation assembly 6. The rubber vibration isolation assembly 5 is disposed between the piezoelectric stack vibration isolation assembly 4 and the electromagnetic vibration isolation assembly 6. The lower end of the piezoelectric stack vibration isolation assembly 4 is connected to the upper end of the rubber vibration isolation assembly 5 via an upper steel plate 7, and the lower end of the rubber vibration isolation assembly is connected to the upper end of the electromagnetic vibration isolation assembly 6 via a lower steel plate 8. The lower end of the force transmission rod assembly 2 is placed inside the housing 1, the upper end of the force transmission rod assembly 2 protrudes from the top of the housing 1, the energy harvesting unit 3 is sleeved on the force transmission rod assembly 2, the bottom end of the force transmission rod assembly 2 abuts against the piezoelectric stack vibration isolation assembly 4, and the energy harvesting unit 3 is connected to the electromagnetic vibration isolation assembly 6 through a wire.

[0025] When external vibrations occur, the force transmission rod assembly transfers the vibrational energy to the energy harvesting unit 3 and the piezoelectric stack vibration isolation assembly 4, respectively. The energy harvesting unit 3 converts the kinetic energy into electrical energy and transmits it to the electromagnetic vibration isolation assembly 6 via wires. The electromagnetic vibration isolation assembly 6 generates a damping force opposite to the vibration direction to counteract the vibration. The piezoelectric stack vibration isolation assembly 4 reduces the vibrational energy, and the remaining vibrational energy is then transferred sequentially to the rubber vibration isolation assembly 5 and the electromagnetic vibration isolation assembly 6. Through the combined vibration isolation of piezoelectric, rubber, and electromagnetic components, the maximum vibration isolation effect is achieved.

[0026] Further, the force transmission rod assembly 2 includes a rod portion 21, a limiting plate 22, and a force transmission plate 23. The limiting plate 22 and the force transmission plate 23 are disposed on the rod portion and located inside the housing 1. The upper end of the rod portion 21 protrudes from the top of the housing. A preload spring 24 is sleeved on the rod portion, and the preload spring 24 is located between the limiting plate 22 and the housing 1. The force transmission plate 23 is located at the bottom end of the rod portion and abuts against the piezoelectric stack vibration isolation assembly 4. The energy harvesting unit 3 is inserted and fixed on the rod portion and located between the limiting plate 22 and the force transmission plate 23. When the force transmission rod assembly 2 is subjected to external vibration, it transmits the vibration energy to the energy harvesting unit, and simultaneously transmits the vibration energy to the piezoelectric stack vibration isolation assembly 4 through the force transmission plate 23.

[0027] Furthermore, the energy harvesting unit 3 includes a beam-type support assembly and multiple piezoelectric power generation components. The beam-type support assembly supports the piezoelectric power generation components. The beam-type support assembly consists of two oppositely arranged insulating support members 31, which have a simply supported beam structure. The piezoelectric power generation components are respectively inserted into the two side support members 31. The bottom of the support members 31 extends into the housing of the electromagnetic vibration isolation component. The connection between the housing of the electromagnetic vibration isolation component and the support member has a through hole 65. The connecting wires of the energy harvesting unit 3 and the electromagnetic vibration isolation component 6 pass through the through hole and are connected to the support member 31.

[0028] The piezoelectric power generation component consists of a piezoelectric ceramic sheet 32 ​​and a stainless steel sheet 33. The piezoelectric ceramic sheet 32 ​​is fixed on the stainless steel sheet 33. The piezoelectric power generation component is sleeved on the rod portion 21 of the force transmission rod assembly at its middle section. The stainless steel sheet is welded and fixed to the rod portion at the connection. Both ends of the piezoelectric ceramic sheet 32 ​​and the stainless steel sheet 33 are welded to one end of a wire, and the other end of the wire is connected to the electromagnetic vibration isolation component 6. Processing devices 34 are arranged at both ends of the piezoelectric power generation component. The processing devices include a rectifier unit and an integrated circuit. The rectifier unit is a circuit board with a rectifier bridge. Multiple piezoelectric power generation components are connected to the rectifier bridge on the circuit board through wires. The integrated circuit is an energy management chip, which is connected to the wires on the circuit board. When the force transmission rod assembly transmits vibration energy to the energy harvesting unit, the piezoelectric power generation component of the energy harvesting unit converts the vibration energy into electrical energy. The generated current is processed by the rectifier unit and the integrated circuit and then transmitted to the electromagnetic vibration isolation component, generating a damping force opposite to the vibration direction to counteract the vibration and achieve the effect of electromagnetic vibration isolation.

[0029] Furthermore, the piezoelectric stack vibration isolation component 4 is composed of multiple piezoelectric ceramic sheets 41 and multiple copper foils 42. The copper foils 42 are inserted between adjacent piezoelectric ceramic sheets, and the piezoelectric ceramic sheets and copper foils are distributed alternately. A wiring hole 15 is provided on the housing. One end of the piezoelectric stack vibration isolation component 4 is welded to a wire, and the other end of the wire passes through the wiring hole of the housing and connects to an external piezoelectric ceramic controller 43. The piezoelectric ceramic controller includes a power amplification module, a PZT sensing control module, and a chassis and power supply module. The power amplification module amplifies the input signal and transmits it to the PZT sensing control module. The PZT sensing control module uses its internal algorithm circuit to control the piezoelectric stack vibration isolation component, thereby achieving the vibration isolation effect of the piezoelectric stack vibration isolation component.

[0030] Furthermore, the rubber vibration isolation component 5 is composed of a single rubber, which is fixed between the piezoelectric pile vibration isolation component 4 and the electromagnetic vibration isolation component 6.

[0031] Furthermore, a steel plate 13 is provided at the bottom of the receiving cavity of the main body. The steel plate 13 corresponds to and is adapted to the electromagnetic vibration isolation component 6. A circular hole 14 is provided at the center of the bottom of the main body. An adjusting nut 9 is adjustablely connected in the circular hole 14. The steel plate is located between the circular hole 14 and the electromagnetic vibration isolation component 6. The electromagnetic vibration isolation component 6 consists of a coil 61, a permanent magnet 62, and a force transmission rod 63. The coil is connected to the piezoelectric generator component through a wire. The permanent magnet 62 is fixed in the middle of the coil 61. The force transmission rod 63 is fixed on the permanent magnet 62. A spring 64 is provided between the steel plate and the permanent magnet. The bottom adjusting nut is used to adjust the vertical position of the permanent magnet 62 in the electromagnetic vibration isolation component so that the top of the force transmission rod 63 on the permanent magnet can contact the lower steel plate 8. It also serves as a preload to reduce the influence of piezoelectric hysteresis.

[0032] Working Principle: When external vibrations occur, the force transmission rod assembly is subjected to vibration, transferring the vibrational energy to the piezoelectric generator assembly. Simultaneously, the vibrational energy is transferred to the piezoelectric stack vibration isolation assembly 4 via the force transmission plate 23. The piezoelectric generator assembly converts the vibrational energy into electrical energy. The generated current is processed by the rectifier unit and integrated circuit before being transmitted to the electromagnetic vibration isolation assembly 6. The piezoelectric stack vibration isolation assembly 4 provides active vibration isolation, reducing some of the vibrational energy. The remaining vibrational energy is then transferred to the rubber vibration isolation assembly 5 via the upper steel plate. The rubber vibration isolation assembly 5 provides passive vibration isolation, reducing the remaining vibrational energy. Finally, the vibrational energy is transferred to the electromagnetic vibration isolation assembly 6 via the lower steel plate 8. The electromagnetic vibration isolation assembly 6 uses the electrical energy from the piezoelectric generator assembly to generate a damping force opposite to the vibration direction to counteract the vibration, achieving the effect of electromagnetic vibration isolation. This fully utilizes the combined vibration isolation effects of piezoelectricity, rubber, and electromagnetism, effectively mitigating external vibrations and achieving maximum vibration isolation.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A piezoelectric rubber-based electromagnetic integrated composite vibration isolation device, characterized in that: The energy collection unit is sleeved on the force transmission rod assembly, the bottom end of the force transmission rod assembly abuts against the piezoelectric stack vibration isolation assembly, the energy collection unit is connected with the electromagnetic vibration isolation assembly through wires, the energy collection unit comprises a beam support assembly and a plurality of piezoelectric power generation assemblies, the beam support assembly is composed of two oppositely arranged insulating support members, the piezoelectric power generation assemblies are respectively inserted on the two side support members, and the piezoelectric power generation assemblies are sleeved and fixed on the force transmission rod assembly at the middle part, the bottom of the support member extends to the shell of the electromagnetic vibration isolation assembly, the support member is in a simply supported beam structure, and the connecting wires of the energy collection unit and the electromagnetic vibration isolation assembly are arranged in the support member, The force transmission rod assembly comprises a rod part, a limiting plate and a force transmission plate, the rod part is sleeved with a pre-press spring, the pre-press spring is located between the limiting plate and the shell, the force transmission plate is located at the bottom end of the rod part and abuts against the piezoelectric stack vibration isolation assembly, and the energy collection unit is inserted on the rod part and located between the limiting plate and the force transmission plate, The piezoelectric power generation assembly is composed of a piezoelectric ceramic sheet and a stainless steel sheet, the piezoelectric ceramic sheet is fixed on the stainless steel sheet, the piezoelectric ceramic sheet and the stainless steel sheet are welded at two ends with one end of the wire, the other end of the wire is connected with the electromagnetic vibration isolation assembly, rectifier units and integrated circuits are arranged at two ends of the piezoelectric power generation assembly, the rectifier unit is a circuit board with a rectifier bridge, a plurality of piezoelectric power generation assemblies are connected with the rectifier bridge on the circuit board through wires, the integrated circuit is an energy management chip, and the energy management chip is connected with the circuit board wire.

2. The piezoelectric rubber electromagnetic integrated composite vibration isolation device according to claim 1, characterized in that: The shell comprises an upper cover plate and a body with a containing cavity, the piezoelectric stack vibration isolation assembly, the rubber vibration isolation assembly and the electromagnetic vibration isolation assembly are sequentially arranged in the body with the containing cavity, a steel plate is arranged at the bottom of the containing cavity of the body, the steel plate corresponds to and is adapted to the electromagnetic vibration isolation assembly, the body has a circular hole at the center of the bottom, and an adjusting nut is adjustably connected in the circular hole, and the steel plate is located between the circular hole and the electromagnetic vibration isolation assembly.

3. The piezoelectric rubber electromagnetic integrated composite vibration isolation device according to claim 2, characterized in that: The lower end of the piezoelectric stack vibration isolation assembly is connected with the upper end of the rubber vibration isolation assembly through the upper steel plate, and the lower end of the rubber vibration isolation assembly is connected with the upper end of the electromagnetic vibration isolation assembly through the lower steel plate.

4. The piezoelectric rubber electromagnetic integrated composite vibration isolation device according to claim 3, characterized in that: The piezoelectric stack vibration isolation assembly is composed of a plurality of piezoelectric ceramic sheets and a plurality of copper foils, the copper foils are inserted between adjacent piezoelectric ceramic sheets, the piezoelectric stack vibration isolation assembly is welded at one end of the wire, and the other end of the wire is connected with an external piezoelectric ceramic controller through the shell.

5. The piezoelectric rubber electromagnetic integrated composite vibration isolation device according to claim 4, characterized in that: The rubber vibration isolation assembly is composed of a single rubber, and the rubber is fixed between the piezoelectric stack vibration isolation assembly and the electromagnetic vibration isolation assembly.

6. The piezoelectric rubber electromagnetic integrated composite vibration isolation device according to claim 5, characterized in that: The electromagnetic vibration isolation assembly is composed of a coil, a permanent magnet and a force transmission rod, the coil is connected with the piezoelectric power generation assembly through a wire, the force transmission rod is fixed on the permanent magnet, the permanent magnet is fixed between the coils, and the permanent magnet is connected with the adjusting nut through a spring and a steel plate.

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