CN115654065A - Electromagnetic type active and passive integrated vibration isolator - Google Patents
Electromagnetic type active and passive integrated vibration isolator Download PDFInfo
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- CN115654065A CN115654065A CN202211270306.XA CN202211270306A CN115654065A CN 115654065 A CN115654065 A CN 115654065A CN 202211270306 A CN202211270306 A CN 202211270306A CN 115654065 A CN115654065 A CN 115654065A
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- 239000002184 metal Substances 0.000 claims description 21
- 229910052751 metal Inorganic materials 0.000 claims description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 18
- 230000001133 acceleration Effects 0.000 claims description 16
- 229920001971 elastomer Polymers 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 2
- 238000002955 isolation Methods 0.000 abstract description 11
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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Abstract
The invention discloses an electromagnetic active and passive integrated vibration isolator, and belongs to the technical field of vibration isolation components. The vibration isolator comprises a passive vibration isolator, an actuator, an upper cover plate and a lower cover plate; the upper end face and the lower end face of the passive vibration isolator are respectively fixedly connected with the upper cover plate and the lower cover plate, the actuator is fixedly connected to the upper cover plate or the lower cover plate, when the actuator is fixedly connected to the upper cover plate, a horizontal gap is reserved between the actuator and the lower cover plate, and when the actuator is fixedly connected to the lower cover plate, a horizontal gap is reserved between the actuator and the upper cover plate; and a gap is also reserved between the actuator and the passive vibration isolator. The invention can realize the independent design of the actuator and the passive vibration isolator, and the actuator has the capability of outputting large electromagnetic force.
Description
Technical Field
The invention belongs to the technical field of vibration isolation components, and particularly relates to an electromagnetic active and passive integrated vibration isolator.
Background
Motors, turbines, pumps, instruments and meters and other equipment on various airplanes, vehicles and ships are generally connected with bases of a machine body, a vehicle body or a ship body through rubber vibration isolators (a common passive vibration isolator). The rubber vibration isolator plays a role in bearing and connecting and plays a role in passive vibration isolation. However, the rubber vibration isolator is limited by natural laws, and generally has a good vibration isolation effect on high-frequency spectral lines and a poor vibration isolation effect on low-frequency spectral lines. And the active vibration isolator can further actively reduce the low-frequency line spectrum. Therefore, the active and passive vibration isolation combination can effectively reduce the vibration line spectrum in the range from low frequency to high frequency, and a better vibration isolation effect is achieved.
The common active and passive integrated vibration isolator consists of a passive vibration isolator and an electromagnetic actuator, wherein a stator and a rotor of the electromagnetic actuator relatively move to generate electromagnetic force; the vibration isolation effect can be improved by adopting a proper control algorithm to control the magnitude of the electromagnetic force in real time.
The patent with publication number CN106438830B provides an electromagnetic active and passive integrated vibration isolator which mainly comprises an electromagnetic actuator and a passive vibration isolator. The electromagnetic actuator mainly comprises a rotor and a stator. The passive vibration isolator and the stator are fixed on the electromagnetic actuator base, and the rotor and the passive vibration isolator are fixed together.
The patent with publication number CN110439961A provides a reluctance type electromagnetic active and passive integrated composite vibration isolator which comprises a passive vibration isolator and an actuator. The passive vibration isolator is a rubber main spring, and the actuator mainly comprises a coil, a rotor magnetic yoke, an adjusting rubber ring, a base, an annular shell, a stator magnetic yoke, a permanent magnet and an upper shell. The rubber main spring, the coil, the rotor magnetic yoke, the adjusting rubber ring and the upper shell form a rotor assembly; the stator assembly is composed of the base, the annular shell, the stator magnet yoke and the permanent magnet. In this configuration, the mover and the passive isolator may be considered to be fixedly coupled.
In the vibration isolators mentioned in the above two patents, the mover is fixedly connected to the passive vibration isolator, so that the movement of the mover is restricted by the movement of the passive vibration isolator. In the vibration process of the equipment, the motion displacement of the passive vibration isolator is extremely small (generally smaller than millimeter level), so that the relative displacement between the rotor and the stator is extremely small, and the electromagnetic force generated between the rotor and the stator is small. That is, the design of the actuator is constrained by the passive isolator, resulting in less actuator output.
Disclosure of Invention
In view of this, the invention provides an electromagnetic active and passive integrated vibration isolator, any part of an actuator is not directly connected with the passive vibration isolator, independent design of the actuator and the passive vibration isolator can be realized, and the actuator has the capability of outputting large electromagnetic force.
An electromagnetic active-passive integrated vibration isolator comprises a passive vibration isolator, an actuator, an upper cover plate and a lower cover plate;
the upper end surface and the lower end surface of the passive vibration isolator are respectively fixedly connected with the upper cover plate and the lower cover plate, the actuator is fixedly connected to the upper cover plate or the lower cover plate, when the actuator is fixedly connected to the upper cover plate, a horizontal gap is reserved between the actuator and the lower cover plate, and when the actuator is fixedly connected to the lower cover plate, a horizontal gap is reserved between the actuator and the upper cover plate; and a gap is also reserved between the actuator and the passive vibration isolator.
Furthermore, the passive vibration isolators adopt rubber vibration isolators, springs or air airbags, and the number of the passive vibration isolators is more than two.
Furthermore, the actuator is an electromagnetic actuator, and the actuator controls the electromagnetic force acting on the mover and the magnitude and direction of the lorentz force by changing the magnitude of the input current, so as to finally change the magnitude and direction of the actuating force.
Further, the actuator comprises a metal shell, a mass block, a supporting spring, a permanent magnet, an iron core and a coil; the mass block, the supporting spring, the permanent magnet, the iron core and the coil are positioned in the metal shell, the mass block and the permanent magnet are fixedly connected to form a rotor, the lower end of the supporting spring is fixedly connected with the bottom of the metal shell, and the upper end of the supporting spring is fixedly connected with the rotor; the coil is evenly wound on the iron core, the iron core is vertically fixed at the center of the bottom of the metal shell and is surrounded by the permanent magnet, and the iron core always keeps a gap with the permanent magnet on the outer side.
The vibration isolator further comprises an acceleration sensor, a controller and a driver, wherein the acceleration sensor is installed on a vibration source or a base, the acceleration sensor detects an acceleration signal in real time and sends the acceleration signal to the controller, the controller calculates a control signal through a control algorithm and sends the control signal to the driver, the driver generates a control current and controls the current of a coil in the actuator, and then the electromagnetic force acting on the rotor and the Lorentz force are controlled, and finally the magnitude and the direction of the acting force are changed.
Has the beneficial effects that:
1. the upper end surface and the lower end surface of the passive vibration isolator are respectively and fixedly connected with the upper cover plate and the lower cover plate, the actuator is fixedly connected on the upper cover plate or the lower cover plate, and the actuator and the passive vibration isolator are not directly connected in structural design, so that the passive vibration isolator and the actuator can be separately and independently designed, the actuator with large output force can be favorably designed, and the overall design difficulty is reduced.
2. The actuator is integrally installed as an independent module, and the actuator is connected by screws and is easy to install, disassemble and replace. When the actuator is disassembled, the rest part can be continuously used as a common passive vibration isolator.
3. The actuator can generate electromagnetic acting force and Lorentz force at the same time through inputting current, obviously improves the capability of converting the current into output force and improves the output efficiency of the actuator.
Drawings
FIG. 1 is a schematic structural diagram of an electromagnetic active-passive integrated vibration isolator according to the present invention (an actuator is connected to an upper cover plate);
FIG. 2 is a schematic structural diagram of the electromagnetic active-passive integrated vibration isolator according to the present invention (the actuator is connected to the lower cover plate);
FIG. 3 is a schematic view of the actuator;
FIG. 4 is a schematic structural view of embodiment 1;
FIG. 5 is a schematic construction diagram of embodiment 2;
fig. 6 is a real object diagram of the electromagnetic active-passive integrated vibration isolator.
The vibration isolator comprises an upper cover plate 1, a lower cover plate 2, a passive vibration isolator 3, an actuator 4, a metal shell 5, a mass block 6, a permanent magnet 7, a support spring 8, an iron core 9 and a coil 10.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings. The invention provides an electromagnetic active and passive integrated vibration isolator which comprises an upper cover plate 1, a lower cover plate 2, a passive vibration isolator 3 and an actuator 4. The upper end surface and the lower end surface of the passive vibration isolator 3 are respectively and fixedly connected with an upper cover plate 1 and a lower cover plate 2. The passive vibration isolator 3 is a rubber vibration isolator and is fixedly connected with the upper cover plate and the lower cover plate in a vulcanization mode.
There are two mounting modes for the actuator, the first mounting mode for the actuator is shown in fig. 1. The upper end face of the actuator 4 is fixedly connected with the upper cover plate 1 through screws, the screws are coated with anti-loosening glue, and a gap is reserved between the lower end face of the actuator and the lower cover plate 2 all the time.
As shown in fig. 2, in the second mounting mode of the actuator, the lower end surface of the actuator 4 is fixedly connected with the lower cover plate 2, and a gap is always reserved between the upper end surface of the actuator and the upper cover plate 1.
Fig. 3 is a schematic diagram showing the structure of the actuator 4. The actuator mainly comprises a metal shell 5, a mass block 6, a permanent magnet 7, a supporting spring 8, an iron core 9 and a coil 10. The mass 6, the permanent magnet 7, the supporting spring 8, the iron core 9 and the coil 10 are arranged inside the metal shell 5. The mass block 6 is fixedly connected with the permanent magnet 7 to form a rotor. The lower end of the supporting spring 8 is fixedly connected with the bottom of the metal shell 5, and the upper end of the supporting spring 8 is fixedly connected with the rotor. The coil 10 is uniformly wound on the iron core 9, and the coil 10 and the iron core 9 form a stator. The iron core 9 is vertically fixed at the center of the bottom of the metal shell 5. The iron core 9 always keeps a gap with the permanent magnet 7 on the outer side.
When current is applied to the coil 10, the coil current magnetizes the iron core 9, and an electromagnet is formed. The electromagnet magnetic field interacts with the permanent magnet 7 magnetic field of the mover to generate an electromagnetic acting force. Meanwhile, the current of the coil 10 is always vertical to the direction of the magnetic field of the permanent magnet 7, and Lorentz force is further generated according to the Faraday law of electromagnetic induction. Therefore, the actuator can simultaneously generate electromagnetic acting force and Lorentz force through input current, the capacity of converting the current into output force is obviously increased, and the output efficiency of the actuator is improved.
The electromagnetic force and lorentz force acting on the mover causes the mover to move, and the inertial force of the mover finally acts on the metal case 5 through the support springs 8. Therefore, the actuation power of the actuator is finally output from the metal case 5.
Example 1:
vibration isolation scene 1: instrument devices for airplanes, vehicles, ships are mounted on a base of a body, a frame, or a hull, and vibration of the instrument devices is inevitably caused when the body vibrates. Vibration isolators are typically provided between the base and the instrumentation to reduce vibration of the instrumentation.
Fig. 4 is an embodiment for vibration isolation scenario 1. The upper cover plate 1 is fixedly connected with equipment through bolts, and the lower cover plate 2 is fixedly connected with the base through bolts. The actuator metal shell 5 is fixedly mounted on the upper cover plate 1. The actuating force of the actuator is output from the metal shell 5. Because the metal shell 5, the upper cover plate 1 and the equipment are fixedly connected together, the actuating force is finally applied to the equipment to reduce the vibration of the equipment.
Example 2:
vibration isolation scene 2: engines, pumps, turbines, etc. in aircraft, vehicles, ships are a type of vibration. In order to reduce the vibration transmitted from these devices to the fuselage, body or hull, the devices are typically mounted on the base of the fuselage, body or hull through vibration isolators.
Fig. 5 is an embodiment directed to scenario 2. The upper cover plate 1 is fixedly connected with equipment through bolts, and the lower cover plate 2 is fixedly connected with the base through bolts. The actuator metal housing 5 is fixedly mounted on the lower cover plate 2. The actuating power of the actuator is output from the metal shell 5. Since the metal shell 5, the lower cover plate 2 and the base are fixedly connected together, the actuating force is finally applied to the base to reduce the vibration of the base.
The main differences between example 1 and example 2 are: the vibration source of embodiment 1 is from the base in order to reduce the vibration of the equipment, so that the acceleration sensor is installed on the equipment, and the actuating force is also exerted on the equipment; the vibration source of embodiment 2 comes from the equipment in order to reduce the vibration of the base, and therefore the acceleration sensor is mounted on the base, and the actuation force is also applied to the base.
The closed-loop vibration control principle of embodiment 1 and embodiment 2 is the same: when vibration occurs, the acceleration sensor detects an acceleration signal in real time and sends the acceleration signal to the controller. The controller calculates a control signal through a control algorithm, the control signal is sent to the driver, the driver generates a control current and controls the current of the coil 10, and then the electromagnetic force acting on the rotor and the magnitude and direction of the Lorentz force are controlled, and finally the magnitude and direction of the actuating force are changed. The application of the actuation force results in a reduction of the acceleration sensor signal, i.e. an improvement of the vibration state.
Fig. 6 is an active and passive integrated vibration isolator designed and manufactured according to fig. 1. The upper cover plate 1 and the lower cover plate 2 are made of stainless steel, the passive vibration isolator 3 is made of polyurethane, and the passive vibration isolator 3 is fixedly connected with the upper cover plate and the lower cover plate in a vulcanization mode. The actuator 4 is fixedly connected with the upper cover plate 1 by adopting a screw. Enough gaps are reserved among the actuator 4, the lower cover plate 2 and the passive vibration isolator 3, and the actuator 4 can be conveniently mounted, dismounted and replaced. After the actuator 4 is disassembled, the rest part can be used as a common passive vibration isolator.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. An electromagnetic active-passive integrated vibration isolator is characterized by comprising a passive vibration isolator, an actuator, an upper cover plate and a lower cover plate;
the upper end surface and the lower end surface of the passive vibration isolator are respectively fixedly connected with the upper cover plate and the lower cover plate, the actuator is fixedly connected to the upper cover plate or the lower cover plate, when the actuator is fixedly connected to the upper cover plate, a horizontal gap is reserved between the actuator and the lower cover plate, and when the actuator is fixedly connected to the lower cover plate, a horizontal gap is reserved between the actuator and the upper cover plate; and a gap is also reserved between the actuator and the passive vibration isolator.
2. The electromagnetic active-passive integrated vibration isolator according to claim 1, wherein a rubber vibration isolator, a spring or an air bag is adopted as the passive vibration isolator, and the number of the passive vibration isolators is more than two.
3. The electromagnetic active-passive integrated vibration isolator according to claim 2, wherein the actuator is an electromagnetic actuator, and the actuator controls the electromagnetic force acting on the mover and the magnitude and direction of the lorentz force by changing the magnitude of the input current, and finally changes the magnitude and direction of the actuating force.
4. The electromagnetic active-passive integrated vibration isolator of claim 3, wherein the actuator comprises a metal housing, a mass block, a support spring, a permanent magnet, an iron core and a coil; the mass block, the supporting spring, the permanent magnet, the iron core and the coil are positioned in the metal shell, the mass block and the permanent magnet are fixedly connected to form a rotor, the lower end of the supporting spring is fixedly connected with the bottom of the metal shell, and the upper end of the supporting spring is fixedly connected with the rotor; the coil is evenly wound on the iron core, the iron core is vertically fixed at the center of the bottom of the metal shell and is surrounded by the permanent magnet, and the iron core always keeps a gap with the permanent magnet on the outer side.
5. The electromagnetic active-passive integrated vibration isolator according to claim 3 or 4, further comprising an acceleration sensor, a controller and a driver, wherein the acceleration sensor is mounted on the vibration source or the base, the acceleration sensor detects an acceleration signal in real time and sends the acceleration signal to the controller, the controller calculates a control signal through a control algorithm and sends the control signal to the driver, the driver generates a control current and controls the magnitude of the current of the coil in the actuator, so as to control the magnitude and direction of the electromagnetic force acting on the mover and the Lorentz force, and finally change the magnitude and direction of the actuating force.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211270306.XA CN115654065A (en) | 2022-10-18 | 2022-10-18 | Electromagnetic type active and passive integrated vibration isolator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211270306.XA CN115654065A (en) | 2022-10-18 | 2022-10-18 | Electromagnetic type active and passive integrated vibration isolator |
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| CN115654065A true CN115654065A (en) | 2023-01-31 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001153175A (en) * | 1999-11-29 | 2001-06-08 | Bridgestone Corp | Active vibration absorber |
| CN101435480A (en) * | 2008-12-15 | 2009-05-20 | 上海工程技术大学 | Inertial mass type vibration isolation device |
| KR20090109069A (en) * | 2008-04-14 | 2009-10-19 | 에이에스엠엘 네델란즈 비.브이. | Positioning system, lithographic apparatus and device manufacturing method |
| CN102748425A (en) * | 2012-06-15 | 2012-10-24 | 中国人民解放军海军工程大学 | Driving-driven hybrid vibration isolator |
| CN103047332A (en) * | 2012-12-31 | 2013-04-17 | 南京航空航天大学 | Vibration control device with vibration isolation and absorption functions |
| CN109915519A (en) * | 2019-03-12 | 2019-06-21 | 上海交通大学 | Electromagnetism inhales vibrating isolation system |
| CN109944904A (en) * | 2019-03-12 | 2019-06-28 | 上海交通大学 | Multi-modal suction vibrating isolation system and platform |
| CN114658784A (en) * | 2022-03-22 | 2022-06-24 | 中国人民解放军国防科技大学 | Permanent magnet and electromagnetic composite active and passive vibration isolation system |
-
2022
- 2022-10-18 CN CN202211270306.XA patent/CN115654065A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001153175A (en) * | 1999-11-29 | 2001-06-08 | Bridgestone Corp | Active vibration absorber |
| KR20090109069A (en) * | 2008-04-14 | 2009-10-19 | 에이에스엠엘 네델란즈 비.브이. | Positioning system, lithographic apparatus and device manufacturing method |
| CN101435480A (en) * | 2008-12-15 | 2009-05-20 | 上海工程技术大学 | Inertial mass type vibration isolation device |
| CN102748425A (en) * | 2012-06-15 | 2012-10-24 | 中国人民解放军海军工程大学 | Driving-driven hybrid vibration isolator |
| CN103047332A (en) * | 2012-12-31 | 2013-04-17 | 南京航空航天大学 | Vibration control device with vibration isolation and absorption functions |
| CN109915519A (en) * | 2019-03-12 | 2019-06-21 | 上海交通大学 | Electromagnetism inhales vibrating isolation system |
| CN109944904A (en) * | 2019-03-12 | 2019-06-28 | 上海交通大学 | Multi-modal suction vibrating isolation system and platform |
| CN114658784A (en) * | 2022-03-22 | 2022-06-24 | 中国人民解放军国防科技大学 | Permanent magnet and electromagnetic composite active and passive vibration isolation system |
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