A permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolator and vibration isolation system

Abstract

The present invention provides a permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolator and a vibration isolation system, which belongs to the field of vibration isolators. The vibration isolator includes an electromagnetic component, a chassis component, a permanent magnet component and an end cover component. The electromagnetic component includes an iron core and a coil; the chassis component includes a base, a bottom shell, a damping pad ring, a positioning column and a bearing spring, and a damping pad ring is arranged in the gap between the base and the bottom shell; the permanent magnet component includes a permanent magnet, a magnetic conductive part, a positioning frame and a ring plate, and the ring plate located at the bottom position is connected to the bottom shell through a bearing spring; the end cover component includes a top shell, an adjustable spring seat, an adjustment spring, a guide bolt and a guide nut. The present invention effectively adjusts the active vibration isolation force through the control current of each coil in the electromagnetic component, has the characteristics of fast response speed, stable output and reliable operation, is suitable for a multi-degree-of-freedom vibration isolation system and can meet different vibration isolation requirements, and when installing vibration isolation objects with different loads, the equipment can be adjusted to the best vibration isolation performance without disassembling the vibration isolator.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration isolators, and in particular to a permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolator and a vibration isolation system. Background Art

[0002] The operation of ship power equipment is accompanied by complex multi-degree-of-freedom vibration phenomena. This vibration will not only cause the performance of important equipment and precision instruments to decline, making it difficult to operate normally, but also shorten their service life. Moreover, due to the water environment, the maintenance and repair of the equipment is quite difficult. Therefore, in order to ensure the normal navigation of the ship and protect the health and safety of the crew, multi-degree-of-freedom vibration control is a must-consider item in the design and manufacturing of modern ship power equipment. In addition, the passive vibration isolation equipment commonly used in ship power equipment can reduce the total vibration level of the entire frequency band, but the control effect on low-frequency vibration is relatively weak, while active vibration isolation can effectively reduce low-frequency vibration.

[0003] In this context, the selection of multi-degree-of-freedom active vibration isolators has a great impact on the performance of the entire vibration isolation system. When facing shocks and vibrations in the horizontal direction, the elastic supports of existing multi-degree-of-freedom active vibration isolators will change the vertical stiffness due to horizontal deformation, thereby reducing the active vibration control effect. In addition, for multi-degree-of-freedom active electromagnetic vibration isolators, when the deadweight of the controlled power equipment changes, the deformation of the elastic support will also change, which will cause the optimal relative position between the components in the electromagnetic force generating device to be destroyed. If you want to ensure the vibration isolation effect, you need to replace a set of vibration isolators that are compatible with the existing working conditions, or you need to dismantle the original vibration isolators and redesign a set of elastic support structures to replace them.

[0004] For the above two common situations in ship power equipment, the current multi-degree-of-freedom active electromagnetic vibration isolators cannot effectively deal with them at the same time. Therefore, it is necessary to propose a multi-degree-of-freedom active electromagnetic vibration isolator that can ensure that the vertical stiffness presents linear characteristics when subjected to impact and vibration in the horizontal direction, and can deal with the change of the deadweight of the vibration isolation object with a lower execution cost. Summary of the invention

[0005] In view of this, the purpose of the present invention is to overcome the problems of horizontal impact vibration affecting vertical stiffness and change in the deadweight of power equipment affecting the performance of active vibration isolators in the prior art multi-degree-of-freedom active vibration isolators, and to provide a permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolator and vibration isolation system.

[0006] Based on the above purpose, the present invention provides a permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolator, comprising:

[0007] A plurality of groups of electromagnetic components are arranged in a vertical direction and are used to generate electromagnetic forces in the x, y and z directions, wherein each group of electromagnetic components includes an iron core and a coil wound on the iron core, and the coils in adjacent electromagnetic components are connected in series;

[0008] A chassis assembly, comprising a base, a bottom shell, a damping washer, a positioning column and a load-bearing spring, wherein the base has a boss, and the bottom shell is provided with a through hole capable of accommodating the boss to be inserted therein at one end thereof facing the base, and a gap is reserved between the outer wall of the boss and the inner wall of the through hole, and a damping washer is provided in the gap, the base is connected to the electromagnetic assembly at the lowest position through the positioning column, and a load-bearing spring is provided inside the bottom shell;

[0009] A plurality of permanent magnet components are arranged in a vertical direction and are used to generate electromagnetic forces in the x, y and z directions. The permanent magnet components include permanent magnets, magnetic conductive parts, positioning frames and ring plates. The permanent magnets used to generate electromagnetic forces in the x and y directions are arranged on the ring plates through the positioning frames, and the permanent magnets used to generate electromagnetic forces in the z direction are arranged in the magnetic conductive parts. The magnetic conductive parts are arranged on the ring plates through the positioning frames. The ring plates in adjacent permanent magnet components are connected in series, and the ring plates at the lowest position are connected to the bottom shell through a load-bearing spring.

[0010] The end cover assembly includes a top shell, an adjustable spring seat, an adjusting spring, a guide bolt and a guide nut. The top shell is connected to the permanent magnet assembly located at the top, and the top shell is connected to the bottom shell by a guide bolt. The guide bolt passes through the top shell, the bottom shell, the adjusting spring, the adjustable spring seat and the guide nut in sequence. The compression amount of the adjusting spring is changed by rotating the guide nut to adjust the relative position between the electromagnetic assembly and the permanent magnet assembly.

[0011] In one of the embodiments, the chassis assembly further includes a guide rail, and the guide rail is disposed inside the bottom shell.

[0012] In one of the embodiments, the permanent magnet assembly further includes a slider, which is disposed on the magnetic conductive member and / or the positioning frame, and is used in conjunction with the guide rail.

[0013] In one of the embodiments, the chassis assembly also includes a limit plate and a height adjustment pad. The limit plate is arranged on the boss of the base, and the two ends of the limit plate protrude and abut against the inner wall of the bottom shell to limit the vertical displacement of the bottom shell. The height adjustment pad is arranged on the limit plate.

[0014] In one of the embodiments, in the electromagnetic assembly and the permanent magnet assembly, the iron core for generating electromagnetic forces in the x and y directions is aligned with the upper and lower end faces of the corresponding permanent magnets, and the iron core for generating electromagnetic forces in the z direction has the same centroid height as the corresponding magnetic conductive member.

[0015] In one embodiment, in the electromagnetic assembly and the permanent magnet assembly, the iron core for generating electromagnetic forces in the x and y directions and the corresponding surface of the positioning frame have scale marks or coatings for observing and adjusting the relative position, and the iron core for generating electromagnetic forces in the z direction and the corresponding surface of the magnetic conductive part have scale marks or coatings for observing and adjusting the relative position.

[0016] In one embodiment, the top shell and the bottom shell have observation windows for observing the relative position relationship between the permanent magnet component and the electromagnetic component.

[0017] In one of the embodiments, a lubricating coating is provided on the contact surface between the bottom shell and the base and / or between the bottom shell and the limiting plate.

[0018] In one of the embodiments, the damping ring is made of metal rubber.

[0019] Based on the same inventive concept, the present invention also provides a permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolation system, including the permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolator as described above.

[0020] It can be seen from the above that the present invention has at least the following beneficial effects:

[0021] The present invention provides a permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolator and vibration isolation system, which can effectively adjust the active vibration isolation force through the control current of each coil in the electromagnetic component, has the characteristics of fast response speed, stable output, and reliable operation, can effectively suppress the vibration of large power equipment, is suitable for multi-degree-of-freedom vibration isolation systems and can meet different vibration isolation effect requirements, and has strong engineering applicability. At the same time, it is easy to install and disassemble, and can also be used in series and parallel combination with various passive vibration isolators. It has wide versatility and can flexibly adapt to a variety of vibration isolation scenarios.

[0022] The permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolator and vibration isolation system provided by the present invention can ensure that the vertical stiffness of the elastic support structure remains unchanged when facing horizontal impact and vibration, and help the active vibration control to converge quickly. Even under complex working conditions, the vibration isolation effect can be stably guaranteed, and the impact resistance is good. Moreover, when the electromagnetic force generating device fails, the elastic support structure bears the load of the vibration isolation object, and the vibration isolator can still complete the vibration isolation work in a passive form and maintain a certain vibration isolation function.

[0023] The permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolator and vibration isolation system provided by the present invention can ensure that the equipment is always in the best active vibration isolation performance state for vibration isolation objects of different types and self-weights by simply adjusting the guide nut outside the vibration isolator. There is no need to replace the vibration isolator or disassemble and replace the elastic support structure. It has high versatility and can easily cope with changes in vibration isolation requirements brought about by vibration isolation objects of different self-weights. It is easy to operate and can effectively ensure the vibration isolation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 The present invention is a schematic structural diagram of a permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolator according to an embodiment of the present invention.

[0026] Figure 2 It is a schematic diagram of the structure of the electromagnetic component in the present invention.

[0027] Figure 3 It is a schematic diagram of the structure of the permanent magnet assembly in the present invention.

[0028] Figure 4 It is a structural schematic diagram of the chassis assembly in the present invention.

[0029] Figure 5 It is a schematic structural diagram of the end cover assembly in the present invention.

[0030] Figure 6 The figure is a top view of a permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolator according to one embodiment of the present invention.

[0031] Figure 7 for Figure 6 AA section view.

[0032] Figure 8 for Figure 6 BB cross-sectional view.

[0033] Fig. 9 Schematic diagram of the structure that generates electromagnetic force in the x and y directions.

[0034] Fig.10 This is a working principle diagram for generating electromagnetic forces in the x and y directions.

[0035] Fig.11 Schematic diagram of the structure that generates electromagnetic force in the z direction.

[0036] Fig.12 This is the working principle diagram for generating electromagnetic force in the z direction.

[0037] The reference numerals are described as follows:

[0038] 1. Top plate; 2. Top shell; 3. Bottom shell; 4. Base; 5. Support; 6. Guide bolt; 7. Coil; 8. Positioning frame; 9. Iron core; 10. Adjustment spring; 11. Guide nut; 12. Guide rail; 13. Slider; 14. Connector; 15. Ring plate; 16. Positioning column; 17. Permanent magnet; 18. Magnetic conductive part; 19. Load-bearing spring; 20. Height adjustment pad; 21. Limit plate; 22. Adjustable spring seat; 23. Damping washer. DETAILED DESCRIPTION

[0039] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0040] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the embodiments of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0041] like Figures 1 to 8A permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolator in one embodiment shown in the figure comprises a plurality of sets of electromagnetic components, a chassis component, a plurality of sets of permanent magnet components and an end cover component, wherein the plurality of sets of electromagnetic components are arranged in a vertical direction and are used to generate electromagnetic forces in the x, y and z directions, wherein each set of electromagnetic components comprises an iron core 9 and a coil 7 wound on the iron core 9, and the coils 7 in adjacent electromagnetic components are connected in series through a connector 14; the chassis component comprises a base 4, a bottom shell 3, a damping washer 23, a positioning column 16 and a load-bearing spring 19, the base 4 has a boss, and the bottom shell 3 is provided with a through hole at one end facing the base 4, and a gap is reserved between the outer wall of the boss and the inner wall of the through hole, and a damping pad ring 23 is provided in the gap. The base 4 is connected to the electromagnetic component located at the lowest position through the positioning column 16, and a bearing spring 19 is provided inside the bottom shell 3; multiple groups of permanent magnet components are arranged in a vertical direction, and are used to generate electromagnetic forces in the x, y, and z directions. The permanent magnet components include a permanent magnet 17, a magnetic conductive member 18, The positioning frame 8 and the ring platform 15, wherein the permanent magnet 17 for generating electromagnetic force in the x and y directions is arranged on the ring platform 15 through the positioning frame 8, and the permanent magnet 17 for generating electromagnetic force in the z direction is arranged in the magnetic conductive member 18, and the magnetic conductive member 18 is arranged on the ring platform 15 through the positioning frame 8, and the ring platform 15 in the adjacent permanent magnet components is connected in series through the support member 5, and the ring platform 15 located at the lowest position is connected to the bottom shell 3 through the bearing spring 19; the end cover assembly includes a top shell 2, a top plate 1, and an adjustable spring Seat 22, adjusting spring 10, guide bolt 6 and guide nut 11, the top plate 1 is connected to the top shell 2 through the support 5, the top shell 2 is connected to the permanent magnet assembly located at the top, the top shell 2 and the bottom shell 3 are connected through the guide bolt 6, the guide bolt 6 passes through the top shell 2, the bottom shell 3, the adjusting spring 10, the adjustable spring seat 22 and the guide nut 11 in sequence, and the compression amount of the adjusting spring 10 is changed by rotating the guide nut 11 to adjust the relative position between the electromagnetic assembly and the permanent magnet assembly.

[0042] The permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolator provided by the present invention can effectively adjust the active vibration isolation force through the control current of each coil 7 in the electromagnetic component, has the characteristics of fast response speed, stable output, and reliable operation, can effectively suppress the vibration of large power equipment, is suitable for multi-degree-of-freedom vibration isolation systems and can meet different vibration isolation effect requirements, and has strong engineering applicability. At the same time, it is easy to install and disassemble, and can also be used in series and parallel combination with various passive vibration isolators. It is widely applicable and can be flexibly adapted to a variety of vibration isolation scenarios.

[0043] Among them, the electromagnetic component and the permanent magnet component generate electromagnetic forces in the x, y, and z directions respectively. Through the interaction of the magnetic field, they can exert electromagnetic forces opposite to the vibration direction on the vibration isolation object, thereby offsetting or weakening the vibration of the vibration isolation object. Since the electromagnetic component and the permanent magnet component can generate electromagnetic forces in the x, y, and z directions, the vibration isolator can achieve multi-degree-of-freedom vibration isolation functions. Regardless of whether the vibration isolation object vibrates in the horizontal direction (x, y direction) or the vertical direction (z direction), the active control force driven by the electromagnetic force in the corresponding direction can be effectively controlled to meet the vibration isolation requirements under different working conditions.

[0044] In a preferred embodiment, the chassis assembly also includes a guide rail 12, which is arranged inside the bottom shell 3; the permanent magnet assembly also includes a slider 13, which is arranged on the magnetic conductive member 18 and / or the positioning frame 8, and the slider 13 is used in conjunction with the guide rail 12 to stabilize the horizontal relative position relationship between the electromagnetic assembly and the permanent magnet assembly without deflection.

[0045] The extendable height-adjusting pad 20 is arranged on the limit plate 21. When facing vibration isolation objects with different loads, in addition to the load-bearing spring 19 and the adjustment spring 10, the height-adjusting pad 20 is used to adjust the electromagnetic element to the optimal relative position, thereby ensuring that the entire multi-degree-of-freedom active electromagnetic vibration isolator can maintain good vibration isolation performance under different load conditions, effectively reducing the impact of external vibration on the vibration isolation object, and ensuring the normal operation and working accuracy of the vibration isolation object under different working conditions.

[0046] In a preferred embodiment, in the electromagnetic assembly and the permanent magnet assembly, the iron core 9 for generating electromagnetic forces in the x and y directions is aligned with the upper and lower end faces of the corresponding permanent magnet 17, and the iron core 9 for generating electromagnetic forces in the z direction is at the same centroid height as the corresponding magnetic conductive member 18. Theoretical derivation, electromagnetic simulation and experimental testing show that this relative position scheme between electromagnetic components can maximize the amplitude of the electromagnetic force under unit current excitation in the corresponding direction, thereby increasing the upper limit of the active vibration isolation force of the equipment and effectively reducing the energy consumption of active vibration isolation.

[0047] In a preferred embodiment, the top shell 2 and the bottom shell 3 have observation windows for observing the relative position relationship between the permanent magnet assembly and the electromagnetic assembly. In the electromagnetic assembly and the permanent magnet assembly, the iron core 9 for generating electromagnetic forces in the x and y directions and the corresponding positioning frame 8 have scale marks or coatings on their surfaces for observing and adjusting the relative positions, and the iron core 9 for generating electromagnetic forces in the z direction and the corresponding magnetic conductive member 18 have scale marks or coatings on their surfaces for observing and adjusting the relative positions. Through the observation windows on the top shell 2 and the bottom shell 3, the relative position between the electromagnetic assembly and the permanent magnet assembly and the position relationship between each assembly and the vibration isolator as a whole can be monitored in real time through scale marks or coatings. When the relative position relationship changes, the offset direction and offset amount can be intuitively found, and the relative position relationship between the electromagnetic components can be ensured to be always in the best state by adjusting the adjustment spring 10.

[0048] In a preferred embodiment, the contact surface between the bottom shell 3 and the base 4 and / or between the bottom shell 3 and the limit plate 21 is provided with a lubricating coating, the main purpose of which is to prevent the sliding friction under high vertical pressure from causing wear to the parts in the chassis assembly.

[0049] In a preferred embodiment, the material of the damping gasket 23 is metal rubber, which can ensure the damping characteristics while having a longer service life in harsh environments such as salt spray, moisture, grease, dust and organic solvent corrosion. This is of great significance for improving the overall performance of the vibration isolator, reducing maintenance costs and ensuring the smooth operation of the equipment.

[0050] In the embodiment of the present invention, the structures for generating electromagnetic forces in the x and y directions are the same, such as Fig. 9 As shown, different degrees of freedom can be achieved by adjusting the installation direction. When the control current is passed through the coil 7, the magnetic fields between the permanent magnet 17 and the end of the iron core 9 will interact with each other. The electromagnetic force on the permanent magnet 17 and the iron core 9 is the force between the magnetic fields. By adjusting the magnitude and direction of the control current, the electromagnetic forces in the x and y directions can be controlled: when the current amplitude changes, the magnetic field strength and the amplitude of the force between the magnetic fields also change accordingly. When the control current direction is changed, the force between the magnetic fields will also reverse accordingly. The principle is as follows: Fig.10 shown.

[0051] In an embodiment of the present invention, the structure generating the electromagnetic force in the z direction is as follows: Fig.11 As shown, when the control current is passed through the coil 7, the permanent magnet component and the electromagnetic component will generate an electromagnetic force composed of the magnetic field force and the Ampere force. The electromagnetic force can be controlled by adjusting the magnitude and direction of the control current. Similarly, when the current amplitude changes, the magnetic field strength and the electromagnetic force amplitude also change accordingly. When the control current direction is changed, the electromagnetic force will also reverse accordingly. Its working principle is as follows Fig.12 shown.

[0052] In actual operation, the controller independently adjusts the control current input to each coil 7 based on the sensor signal of the observation point, and then regulates the electromagnetic force of each degree of freedom to offset the vibration of each degree of freedom, thereby realizing the efficient and accurate vibration isolation function of the multi-degree-of-freedom active electromagnetic vibration isolator.

[0053] Through theoretical derivation, electromagnetic finite element simulation and experimental verification, it is known that within the working current range, the force between the Ampere force and the magnetic field is the linear force of the current, which is suitable for active vibration control systems.

[0054] Furthermore, the vertical stiffness stability is described below. Unlike conventional vibration isolators, the load-bearing spring 19 is not installed between the vibration isolation object and the base structure, but between the permanent magnet assembly and the bottom shell 3. Therefore, when facing horizontal shocks and vibrations, the damping washer 23 installed in the gap between the through hole of the bottom shell 3 and the boss of the base 4 will play a role in buffering the horizontal displacement, and the relative horizontal position between the end cover assembly, the permanent magnet assembly and the bottom shell 3 remains unchanged, that is, the load-bearing spring 19 does not have a horizontal displacement, and will not change the vertical stiffness, which is conducive to the rapid convergence of active vibration control.

[0055] The permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolator provided by the present invention can ensure that the vertical stiffness of the elastic support structure remains unchanged when facing horizontal impact and vibration, and help the active vibration control to converge quickly. Even under complex working conditions, the vibration isolation effect can be stably guaranteed, and the impact resistance is good. Moreover, when the electromagnetic force generating device fails, the elastic support structure bears the load of the vibration isolation object, and the vibration isolator can still complete the vibration isolation work in a passive form and maintain a certain vibration isolation function.

[0056] Further, the following describes the principle of always maintaining the best active vibration isolation performance without disassembly or replacement after matching the vibration isolation objects of different deadweights. After reasonable design, when acting on the target vibration isolation object, the load-bearing spring 19 and the adjustment spring 10 are both in a compressed state, so that the permanent magnet component and the electromagnetic component are in the best relative position, and the electromagnetic force under the unit current reaches the maximum, so that the active vibration isolation performance of the multi-degree-of-freedom active electromagnetic vibration isolator is optimal. When the deadweight of the vibration isolation object increases, the static equilibrium position of the end cover assembly and the permanent magnet component decreases, and the permanent magnet component and the electromagnetic component are no longer in the best relative position. Check the scale marks of the permanent magnet component and the electromagnetic component through the observation window, lower the position of the guide nut 11, reduce the compression of the adjustment spring 10, thereby raising the static equilibrium position of the end cover assembly and the permanent magnet component, and finally restore the active vibration isolation performance of the multi-degree-of-freedom active electromagnetic vibration isolator to the best. Similarly, when the deadweight of the vibration isolation object decreases, the position of the guide nut 11 is adjusted to the best, and the above two processes do not require the vibration isolator to be disassembled or replaced.

[0057] The permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolator and vibration isolation system provided by the present invention can ensure that the equipment is always in the best active vibration isolation performance state for vibration isolation objects of different types and self-weights by simply adjusting the guide nut 11 outside the vibration isolator. There is no need to replace the vibration isolator or disassemble and replace the elastic support structure. It has high versatility and can easily cope with changes in vibration isolation requirements brought about by vibration isolation objects of different self-weights. It is easy to operate and can effectively ensure the vibration isolation effect.

[0058] The working process of the present invention is described in detail below: when the vibration isolation object generates horizontal vibration or impact, the vibration or impact is effectively absorbed by the damping washer 23, and the controller controls the current of the coil 7 in the electromagnetic assembly to generate horizontal electromagnetic force according to the feedback signal of the measuring point sensor, thereby offsetting the horizontal vibration. During this period, the load-bearing spring 19 does not undergo horizontal deformation, thereby ensuring the stability of the vertical stiffness; similarly, when the vibration isolation object generates vertical vibration or impact, the load-bearing spring 19 and the adjustment spring 10 effectively attenuate the transmitted energy, and according to the feedback signal of the measuring point sensor, the controller adjusts the current of the coil 7 in the electromagnetic assembly to generate vertical electromagnetic force, thereby achieving the effect of vertical vibration control; when the deadweight of the vibration isolation object increases or decreases, the guide nut 11 is adjusted downward or upward, and the relative position between the electromagnetic assembly and the permanent magnet assembly is determined through the observation window to be restored to the optimal state.

[0059] The present invention further provides a permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolation system, which covers the permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolator described above, so it fully possesses all the beneficial effects of the permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolator, and this embodiment will not be described in detail here.

[0060] The embodiments of the present invention are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present invention should be included in the protection scope of the present invention.

Claims

1. A permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolator, characterized in that: include: A plurality of groups of electromagnetic components are arranged in a vertical direction, each group of electromagnetic components is used to generate electromagnetic force in only one of the x, y, and z directions, wherein each group of electromagnetic components includes an iron core and a coil wound on the iron core, and adjacent electromagnetic components are mechanically connected in series; A chassis assembly, comprising a base, a bottom shell, a damping washer, a positioning column and a load-bearing spring, wherein the base has a boss, and the bottom shell is provided with a through hole capable of accommodating the boss to be inserted therein at one end thereof facing the base, and a gap is reserved between the outer wall of the boss and the inner wall of the through hole, and a damping washer is provided in the gap, the base is connected to the electromagnetic assembly at the lowest position through the positioning column, and a load-bearing spring is provided inside the bottom shell; A plurality of groups of permanent magnet components are arranged in a vertical direction, each group of permanent magnet components is used to generate electromagnetic force in only one of the x, y, and z directions, the permanent magnet components include permanent magnets, a positioning frame, and a ring plate, wherein the permanent magnets used to generate electromagnetic force in the x and y directions are arranged on the ring plate through the positioning frame, the permanent magnet components used to generate electromagnetic force in the z direction also include a magnetic conductive member, the permanent magnet is arranged in the magnetic conductive member, the magnetic conductive member is arranged on the ring plate through the positioning frame, the ring plates in adjacent permanent magnet components are connected in series, and the ring plate at the lowest position is connected to the bottom shell through a load-bearing spring; The end cover assembly includes a top shell, an adjustable spring seat, an adjusting spring, a guide bolt and a guide nut. The top shell is connected to the permanent magnet assembly located at the top, and the top shell is connected to the bottom shell by a guide bolt. The guide bolt passes through the top shell, the bottom shell, the adjusting spring, the adjustable spring seat and the guide nut in sequence. The compression amount of the adjusting spring is changed by rotating the guide nut to adjust the relative position between the electromagnetic assembly and the permanent magnet assembly.

2. The permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolator according to claim 1, characterized in that: The chassis assembly also includes a guide rail, which is arranged inside the bottom shell and is used to limit the horizontal translation and rotation of the permanent magnet assembly relative to the chassis assembly, thereby completing the vertical guidance of the permanent magnet assembly.

3. The permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolator according to claim 2, characterized in that: The permanent magnet assembly further includes a slider, which is disposed on the magnetic conductive member and / or the positioning frame in the permanent magnet assembly for generating electromagnetic force in the z direction, and the slider is used in conjunction with the guide rail.

4. The permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolator according to claim 1, characterized in that: The chassis assembly also includes a limit plate and a height adjustment pad. The limit plate is arranged on the boss of the base, and the two ends of the limit plate protrude and abut against the inner wall of the bottom shell to limit the vertical displacement of the bottom shell. The height adjustment pad is arranged on the limit plate.

5. A permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolator according to any one of claims 1 to 4, characterized in that: In the electromagnetic assembly and permanent magnet assembly, the iron core for generating electromagnetic forces in the x and y directions is aligned with the upper and lower end faces of the corresponding permanent magnets, and the iron core for generating electromagnetic forces in the z direction has the same centroid height as the corresponding magnetic conductive member.

6. The permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolator according to claim 5, characterized in that: In the electromagnetic assembly and permanent magnet assembly, the iron core used to generate electromagnetic forces in the x and y directions and the corresponding surface of the positioning frame have scale marks or coatings for observing and adjusting the relative position, and the iron core used to generate electromagnetic forces in the z direction and the corresponding surface of the magnetic conductive part have scale marks or coatings for observing and adjusting the relative position.

7. The permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolator according to claim 5, characterized in that: The top shell and the bottom shell have observation windows for observing the relative position relationship between the permanent magnet component and the electromagnetic component.

8. The permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolator according to claim 4, characterized in that: The contact surface between the bottom shell and the base and / or between the bottom shell and the limiting plate is provided with a lubricating coating.

9. The permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolator according to claim 1, characterized in that: The material of the damping pad ring is metal rubber.

10. A permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolation system, characterized in that: It comprises the permanent magnet composite multi-degree-of-freedom active electromagnetic vibration isolator as described in any one of claims 1 to 9.

Images