CN113931969A - Active electromagnetic damper - Google Patents
Active electromagnetic damper Download PDFInfo
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- CN113931969A CN113931969A CN202111298751.2A CN202111298751A CN113931969A CN 113931969 A CN113931969 A CN 113931969A CN 202111298751 A CN202111298751 A CN 202111298751A CN 113931969 A CN113931969 A CN 113931969A
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- 238000013016 damping Methods 0.000 claims abstract description 183
- 238000006073 displacement reaction Methods 0.000 claims abstract description 84
- 238000003475 lamination Methods 0.000 claims description 37
- 238000004804 winding Methods 0.000 claims description 16
- 238000013500 data storage Methods 0.000 claims description 13
- 238000013079 data visualisation Methods 0.000 claims description 13
- 238000011217 control strategy Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 16
- 238000010586 diagram Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/03—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using magnetic or electromagnetic means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/002—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion characterised by the control method or circuitry
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/022—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using dampers and springs in combination
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B11/00—Automatic controllers
- G05B11/01—Automatic controllers electric
- G05B11/36—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential
- G05B11/42—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential for obtaining a characteristic which is both proportional and time-dependent, e.g. P. I., P. I. D.
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/06—Stiffness
- F16F2228/066—Variable stiffness
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2230/00—Purpose; Design features
- F16F2230/08—Sensor arrangement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2230/00—Purpose; Design features
- F16F2230/14—Ball joints; Spherical support elements
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Electromagnetism (AREA)
- Vibration Prevention Devices (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention discloses an active electromagnetic damper, which comprises a seat body, a damping core, a displacement sensor assembly and an electromagnet assembly. The axial end of the seat body is provided with an opening, and the seat body is provided with an inner cavity communicated with the opening; the damping core is coaxially arranged with the rotor, one end of the damping core is axially connected with one end of the rotor, and the other end of the damping core is connected with the inner wall of the end part of the other axial end of the seat body, so that the vortex motion of the rotor is inhibited without controlling the rotation of the rotor; the displacement sensor assembly is positioned in the inner cavity and is used for measuring the vibration displacement of the damping core; the electromagnet assembly is located in the inner cavity and used for outputting electromagnetic force according to the vibration displacement measured by the displacement sensor assembly so as to effectively restrain the vibration of the damping core and further control the amplitude of the rotor. The invention improves the damping effect through active control.
Description
Technical Field
The invention relates to the technical field of rotor vibration damping, in particular to an active electromagnetic damper.
Background
With the gradual improvement of the research and development and manufacturing capability of rotary machines and the continuous deepening of the rotor dynamics research, actual engineering puts higher and higher requirements on the running rotating speed of the rotor. However, during ramp-up to operating speed, high speed rotors not only experience multiple system criticalities, but also need to smoothly pass through several rotor bending criticalities, which presents certain challenges to amplitude control and energy dissipation of rotor vibrations. On one hand, the excessive amplitude may cause the collision friction between the rotor and the static part, and further cause the rotor to reduce the speed and not reach the rated rotating speed; on the other hand, the interaction force during the rubbing process may cause the abrasion of the rotor, which may lead to the damage of the equipment in severe cases.
In order to ensure that equipment carrying a high-speed rotor stably passes through multi-stage critical rotating speed, the damper is installed on the rotor by an effective means. Taking the oil damper which is most widely applied in engineering as an example, when the rotor normally operates, the damping core soaked in the damping oil can be driven to vibrate together, and then the damping oil is driven to move together; the moving damping oil provides restoring force and damping force to the damping core, dissipates vibration energy transferred to the damping core, and plays a role in controlling the amplitude of the rotor.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide an active electromagnetic damper, which can provide a large electromagnetic force to a rotor in a wide rotation speed interval, especially a low speed interval, by using a controllable electromagnetic force, and improve a damping effect by active control.
An active electromagnetic damper according to an embodiment of the present invention includes:
the seat body is provided with an opening at one axial end and an inner cavity communicated with the opening;
the damping core is coaxially arranged with the rotor, one end of the damping core is axially connected with one end of the rotor, and the other end of the damping core is connected with the other axial end of the seat body, so that the vortex motion of the rotor is inhibited without controlling the rotation of the rotor;
a displacement sensor assembly located in the inner cavity for measuring vibrational displacement of the damping core;
and the electromagnet assembly is positioned in the inner cavity and used for outputting electromagnetic force according to the vibration displacement measured by the displacement sensor assembly so as to effectively inhibit the vibration of the damping core and control the amplitude of the rotor.
According to the active electromagnetic damper provided by the embodiment of the invention, compared with the existing damper of the rotor, the active electromagnetic damper provided by the embodiment of the invention adopts an active control mode, outputs electromagnetic force to the damping core through the electromagnet assembly, realizes the variable rigidity and damping parameters of the system, realizes the appropriate damping effect provided for the rotor in a wider rotating speed range, especially a low rotating speed interval, and solves the problem that the existing damper cannot adjust the damping parameters under different rotating speed conditions; meanwhile, an active control (namely feedback control) mode is adopted, so that the damping effect is greatly improved.
According to an embodiment of the present invention, the active electromagnetic damper further includes a rotor small shaft and a ball bearing, the rotor small shaft and the rotor are coaxially disposed, one end of the rotor small shaft is fixed to one end of the rotor, and the other end of the rotor small shaft is connected to one end of the damping core through the ball bearing.
According to one embodiment of the invention, the inner wall of the end part at the other end of the seat body is provided with a shaft socket; the active electromagnetic damper further comprises a damping core small shaft, the damping core small shaft and the damping core are coaxially arranged, one end of the damping core small shaft is axially fixed relative to one end of the damping core, and the other end of the damping core small shaft is inserted into the shaft socket.
According to one embodiment of the present invention, the displacement sensor assembly includes a sensor lamination disposed on the damping core and a sensor winding set mounted on the housing radially opposite the sensor lamination and in non-contact with the sensor lamination.
According to one embodiment of the present invention, the electromagnet assembly includes an electromagnet lamination disposed on the damping core and an electromagnet winding group radially opposite to the electromagnet lamination and mounted on the housing without contacting the electromagnet lamination.
According to one embodiment of the invention, the displacement sensor assembly is adjacent to one end of the damping core, the displacement sensor assembly being interposed between one end of the damping core and the electromagnet assembly in the axial direction of the damper.
According to a further embodiment of the present invention, the seat body includes a first seat body and a second seat body, the first seat body and the second seat body are axially inserted and sealed and fixed, the displacement sensor assembly is located in the first seat body, the electromagnet assembly is located in the second seat body, and one end of the first seat body is provided with the opening.
According to an embodiment of the present invention, the active electromagnetic damper further includes a plurality of elastic elements, the plurality of elastic elements are distributed at intervals along a circumferential direction of the damping core, one end of the plurality of elastic elements is connected to one end of the damping core, and the other end of the plurality of elastic elements is connected to one axial end of the seat body.
According to one embodiment of the invention, the inner cavity is filled with a damping medium.
According to an embodiment of the present invention, the active electromagnetic damper further includes an FPGA circuit module, the FPGA circuit module is electrically connected to the displacement sensor assembly and the electromagnet assembly, respectively, and the FPGA circuit module is configured to obtain a voltage signal corresponding to the vibration displacement of the damping core through the displacement sensor assembly, process the voltage signal, and output a current to the electromagnet assembly to generate a corresponding electromagnetic force, so as to effectively suppress the vibration of the damping core, thereby controlling the amplitude of the rotor.
According to a further embodiment of the present invention, the FPGA circuit module includes a controller, a signal collector, an operator, and a power amplifier, the controller controls the operation of the signal collector, the operator, and the power amplifier, and the signal collector obtains the voltage signal and transmits the voltage signal to the operator; the arithmetic unit calculates the voltage signal under a control strategy, inputs a processed voltage signal to the power amplifier, and the power amplifier outputs current to the electromagnet assembly under the action of the processed voltage signal so as to enable the electromagnet assembly to generate electromagnetic force.
According to a still further embodiment of the present invention, the active electromagnetic damper further includes a data acquisition card and a data visualization and storage system, wherein the data acquisition card is configured to acquire the voltage signal corresponding to the vibration displacement and the current output by the power amplifier, and transmit the voltage signal and the current output by the power amplifier to the data visualization and storage system; the data visualization and storage system is electrically connected to the controller.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a partial structural schematic diagram of an active electromagnetic damper according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an active electromagnetic damper according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of the active electromagnetic damper according to the embodiment of the present invention when connected to the rotor.
Reference numerals:
active electromagnetic damper 1000
Damping core 2 displacement sensor assembly 3
Rotor small shaft 5 ball head bearing 6 damping core small shaft 7 elastic element 8
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
An active electromagnetic damper 1000 according to an embodiment of the present invention is described below with reference to fig. 1 to 3.
As shown in fig. 1 to 3, an active electromagnetic damper 1000 according to an embodiment of the present invention includes a base 1, a damping core 2, a displacement sensor assembly 3, and an electromagnet assembly 4.
An opening 101 is formed in one axial end of the seat body 1, and an inner cavity 102 communicated with the opening 101 is formed in the seat body 1; the damping core 2 is coaxially arranged with the rotor 11, one end of the damping core 2 is axially connected with one end of the rotor 11, and the other end of the damping core is connected with the other axial end of the base body 1, so that the vortex motion of the rotor 11 is inhibited without controlling the rotation of the rotor 11; the displacement sensor assembly 3 is positioned in the inner cavity 102 and is used for measuring the vibration displacement of the damping core 2; the electromagnet assembly 4 is located in the inner cavity 102 for outputting an electromagnetic force according to the vibration displacement measured by the displacement sensor assembly 3 to effectively suppress the vibration of the damping core 2, thereby controlling the amplitude of the rotor 11.
Specifically, an opening 101 is formed at one axial end of the seat body 1, and the seat body 1 is provided with an inner cavity 102 communicated with the opening 101; in this way, on the one hand, it is convenient for the damping core 2 to be accommodated in the inner cavity 102 and the opening 101, so that one axial end of the damping core 2 can be located in the opening 101, and it is convenient for one axial end of the damping core 2 to be axially connected with one end of the rotor 11, and on the other hand, it is convenient for functional components such as the displacement sensor assembly 3 and the electromagnet assembly 4 to be accommodated and mounted. The damping core 2 is coaxially arranged with the rotor 11, one end of the damping core 2 is axially connected with one end of the rotor 11, and the other end of the damping core is connected with the other end of the base body 1, so that the vortex motion of the rotor 11 is inhibited without controlling the rotation of the rotor 11; that is, the connection manner of one end of the damping core 2 and one end of the rotor 11 and the connection manner of the other end of the damping core 2 and the other end of the housing 1 may be such that the normal rotation of the rotor 11 is not affected after the vibration of the damping core 2 is caused when the rotor 11 rotates, but may be used to suppress the whirling motion of the rotor 11. It should be noted that the rotor 11 here may be a rotor in a vertical rotor system or a rotor in a horizontal rotor system.
The displacement sensor assembly 3 is positioned in the inner cavity 102 and is used for measuring the vibration displacement of the damping core 2; it can be understood that the vibration displacement of the damping core 2 is measured in real time by the displacement sensor assembly 3, in order to make the electromagnet assembly 4 output electromagnetic force of a suitable magnitude, i.e., the electromagnetic force can be actively controlled, the rotor 11 can be provided with a large electromagnetic force in a wide rotational speed interval, especially a low speed interval, and the damping effect can be improved by the active control.
The electromagnet assembly 4 is located in the inner cavity 102 for outputting an electromagnetic force according to the vibration displacement measured by the displacement sensor assembly 3 to effectively suppress the vibration of the damping core 2, thereby controlling the amplitude of the rotor 11. After the damping core 2 is vibrated by the rotor 11 or other vibration sources, the electromagnet assembly 4 can output electromagnetic force with proper magnitude according to the vibration displacement measured by the displacement sensor assembly 3, so that the vibration of the damping core 2 is effectively suppressed, and further, the whirling of the rotor 11 can be suppressed by the damping core 2 without controlling the rotation of the rotor 11, so that the amplitude of the rotor 11 can be controlled.
According to the active electromagnetic damper 1000 of the embodiment of the invention, when the rotor 11 or other vibration sources cause the damping core 2 to vibrate, the displacement sensor assembly 3 can measure the vibration displacement of the damping core 2 in real time, and the electromagnet assembly 4 outputs electromagnetic force with proper magnitude to the damping core 2 according to the vibration displacement of the damping core 2 and applies the electromagnetic force to the damping core 2, so that the vibration of the damping core 2 can be effectively inhibited, the effect of controlling the amplitude of the rotor 11 is achieved, and the damping effect is greatly improved by adopting an active control (namely feedback control) mode.
According to the active electromagnetic damper 1000 of the embodiment of the invention, compared with the existing damper of the rotor, the active electromagnetic damper 1000 of the embodiment of the invention adopts an active control mode, outputs electromagnetic force to the damping core 2 through the electromagnet assembly 4, realizes the variable rigidity and damping parameters of the system, realizes the appropriate damping effect to the rotor 11 in a wider rotating speed range, especially in a low rotating speed interval, and solves the problem that the existing damper can not adjust the damping parameters under different rotating speed conditions; meanwhile, an active control (namely feedback control) mode is adopted, so that the damping effect is greatly improved.
According to an embodiment of the present invention, when the active electromagnetic damper 1000 further includes a rotor small shaft 5 and a ball bearing 6, the rotor small shaft 5 and the rotor 11 are coaxially disposed, one end of the rotor small shaft 5 is fixed with one end of the rotor 11, and the other end of the rotor small shaft 5 is connected with one end of the damping core 2 through the ball bearing 6. That is to say, rotor 11 can drive rotor staff 5 to rotate when rotating, and ball bearing 6 is installed in one of damping core 2 and serves to make rotor staff 5 can not drive damping core 2 to rotate when rotating, and when rotor 11 vibrated, the vibration of rotor 11 can be passed through rotor staff 5 and ball bearing and transmitted for damping core 2, arouses damping core 2 to vibrate.
In a specific example, one end of the damping core 2 is opened with a mounting hole for mounting the ball bearing 6, and the ball bearing 6 can be conveniently mounted in the mounting hole.
According to one embodiment of the invention, the inner wall of the other end part of the seat body 1 is provided with a shaft socket 103; the active electromagnetic damper 1000 further comprises a damping core small shaft 7, the damping core small shaft 7 and the damping core 2 are coaxially arranged, one end of the damping core small shaft 7 is axially fixed relative to one end of the damping core 2, and the other end of the damping core small shaft 7 is inserted into the shaft socket 103. According to one embodiment of the present invention, displacement sensor assembly 3 includes a sensor lamination 301 and a sensor winding set 302, sensor lamination 301 being disposed on damping core 2, sensor winding set 302 being mounted on housing 1 radially opposite sensor lamination 301 and in non-contact with sensor lamination 301. It can be understood that since the sensor lamination 301 is disposed on the damping core 2, when the damping core 2 vibrates, the sensor lamination 301 vibrates synchronously, and the sensor winding group 302 measures the displacement of the sensor lamination 301 in real time, so that the vibration displacement of the damping core 2 can be measured in real time.
In a specific example, a first groove for installing the sensor lamination 301 is reserved on the side wall of the damping core 2, and the sensor lamination 301 is fixed in the first groove, so that the installation is reliable.
According to one embodiment of the present invention, the electromagnet assembly 4 includes an electromagnet lamination 401 and an electromagnet winding group 402, the electromagnet lamination 401 is disposed on the damping core 2, and the electromagnet winding group 402 is installed on the housing 1 radially opposite to the electromagnet lamination 401 and is not in contact with the electromagnet lamination 401. Thus, the electromagnetic force output by the electromagnet assembly 4 can control the vibration of the damping core 2.
In a specific example, a second groove for installing the electromagnet lamination 401 is reserved on the side wall of the damping core 2, and the electromagnet lamination 401 is fixed in the second groove, so that the installation is reliable.
According to one embodiment of the invention, the displacement sensor assembly 3 is close to one end of the damping core 2, the displacement sensor assembly 3 being interposed between one end of the damping core 2 and the electromagnet assembly 4 in the axial direction of the damper. It can be understood that because the one end and the rotor 11 of damping core 2 are connected, consequently when rotor 11 drove damping core 2 and takes place the vibration, the vibration range of the one end of damping core 2 is bigger than the other end, sets up displacement sensor subassembly 3 in the position department of being close to 2 one ends of damping core, like this, the vibration of range just can be monitored to displacement sensor subassembly 3 to it is more accurate as far as possible to make the vibration monitoring result.
According to a further embodiment of the present invention, the seat body 1 includes a first seat body 104 and a second seat body 105, the first seat body 104 and the second seat body 105 are axially inserted and sealed and fixed, the displacement sensor assembly 3 is located in the first seat body 104, the electromagnet assembly 4 is located in the second seat body 105, and one end of the first seat body 104 is provided with an opening 101. That is, the first seat 104 and the second seat 105 are independent parts, so that the processing is convenient, and the internal assembly of the displacement sensor assembly 3 and the electromagnet assembly 4 is also convenient.
According to a further embodiment of the present invention, the side wall of the second base 105 is provided with a wire connection port. It can be understood that the wiring port is used for leading out the winding wires of the displacement sensor assembly 3 and the electromagnet assembly 4, and further plays a role in transmitting the electric signals of the displacement sensor assembly 3 and transmitting the electric signals of the control electromagnet assembly 4.
According to an embodiment of the present invention, the active electromagnetic damper 1000 further includes a plurality of elastic elements 8, the plurality of elastic elements 8 are distributed at intervals along the circumferential direction of the damping core 2, one end of the plurality of elastic elements 8 is connected to one end of the damping core 2, and the other end of the plurality of elastic elements 8 is connected to one axial end of the seat body 1. It can be understood that the elastic element 8 is used to provide a restoring force for the damping core 2, on one hand, the elastic element 8 is arranged to prevent the damping core 2 from vibrating too much, on the other hand, the elastic element 8 enables the damping core 2 to restore to the original position when the vibration disappears, so that the rotor 11 is not easily deflected.
According to an embodiment of the present invention, the damping medium is filled in the inner cavity 102, so as to further enhance the damping effect of the active electromagnetic damper 1000 according to the embodiment of the present invention.
According to an embodiment of the present invention, the active electromagnetic damper 1000 further includes an FPGA circuit module 9, the FPGA circuit module 9 is electrically connected to the displacement sensor assembly 3 and the electromagnet assembly 4, respectively, and the FPGA circuit module 9 is configured to obtain a voltage signal corresponding to the vibration displacement of the damping core 2 through the displacement sensor assembly 3, process the voltage signal, and output a current to the electromagnet assembly 4 to generate a corresponding electromagnetic force, so as to effectively suppress the vibration of the damping core 2, and further suppress the whirling of the rotor 11, thereby controlling the amplitude of the rotor 11, and implementing active control.
According to a further embodiment of the present invention, as shown in fig. 2, the FPGA circuit module 9 includes a controller, a signal collector, an operator and a power amplifier, the controller controls the operation of the signal collector, the operator and the power amplifier, the signal collector obtains a voltage signal and transmits the voltage signal to the operator; the arithmetic unit calculates the voltage signal under the control strategy, inputs the processed voltage signal to the power amplifier, and the power amplifier outputs current to the electromagnet assembly 4 under the action of the processed voltage signal so as to enable the electromagnet assembly 4 to generate magnetic force. Specifically, after the rotor 11 causes the damping core 2 to vibrate, the signal collector obtains a voltage signal corresponding to the vibration displacement of the damping core 2 through the displacement sensor assembly 3, and transmits the corresponding voltage signal to the arithmetic unit, and the arithmetic unit performs calculation under a certain control strategy (i.e., a control algorithm) and outputs the processed voltage signal to the power amplifier. Under the action of the processed voltage signal, the power amplifier outputs current to the electromagnet assembly 4 and drives the electromagnet assembly 4 to output electromagnetic force to the damping core 2, so that the vibration of the rotor 11 is controlled, and active control is realized.
According to a further embodiment of the present invention, as shown in fig. 2, the active electromagnetic damper 1000 further includes a data acquisition card and a data visualization and storage system 10, the data acquisition card is configured to acquire the voltage signal corresponding to the vibration displacement and the current output by the power amplifier, and transmit the voltage signal and the current output by the power amplifier to the data visualization and storage system 10, so that the data visualization and storage system 10 can be utilized to perform lookup and analysis processing on the data of the voltage signal corresponding to the vibration displacement and the current output by the power amplifier; the data visualization and storage system 10 is electrically connected to the controller, so that the PID parameter control program can be written into the controller through the data visualization and storage system 10, and the control logic of the controller can be changed as required.
According to some embodiments of the present invention, the mass of the damping core 2, the connection stiffness of the elastic element 8, the ball bearing 6 and the connection stub shaft 5 are all designed according to the dynamic properties of the rotor system where the rotor 11 is located, so that the active electromagnetic damper 1000 of the present invention can be used normally.
An active electromagnetic damper 1000 according to an embodiment of the present invention is illustrated by a specific example.
In this particular example, the active electromagnetic damper 1000 includes a base 1, a damping core 2, a displacement sensor assembly 3, an electromagnet assembly 4, an FPGA circuit module 9, a data acquisition card, a data visualization and storage system 10, and an elastic element 8.
The base 1 includes a first base 104 and a second base 105, the first base 104 and the second base 105 are axially inserted and sealed and fixed, the displacement sensor assembly 3 is located in the first base 104, the electromagnet assembly 4 is located in the second base 105, one end of the first base 104 is provided with an opening 101, a side wall of the second base 105 is provided with a wiring port, the first base 104 and the second base 105 define an inner cavity 102, and the inner cavity 102 is filled with a damping medium.
The damping core 2 and the rotor 11 are coaxially arranged, a mounting hole for mounting the ball bearing 6 is formed in one end of the damping core 2, and the ball bearing 6 can be conveniently mounted in the mounting hole. When active electromagnetic damper 1000 still includes rotor staff 5 and ball bearing 6, rotor staff 5 and the coaxial setting of rotor 11, the one end of rotor staff 5 is fixed with the one end of rotor 11, and the other end of rotor staff 5 passes through ball bearing 6 and links to each other with 2 one end of damping core to in the whirl of suppression rotor 11 and not control the rotation of rotor 11. That is to say, rotor 11 can drive rotor staff 5 to rotate when rotating, and ball bearing 6 is installed in one of damping core 2 and serves to make rotor staff 5 can not drive damping core 2 to rotate when rotating, and when rotor 11 vibrated, the vibration of rotor 11 can be passed through rotor staff 5 and ball bearing and transmitted for damping core 2, arouses damping core 2 to vibrate.
A shaft socket 103 is arranged on the inner wall of the end part at the other end of the seat body 1; the active electromagnetic damper 1000 further comprises a damping core small shaft 7, the damping core small shaft 7 and the damping core 2 are coaxially arranged, one end of the damping core small shaft 7 is axially fixed relative to one end of the damping core 2, and the other end of the damping core small shaft 7 is inserted into the shaft socket 103.
The displacement sensor assembly 3 is positioned in the inner cavity 102 and is used for measuring the vibration displacement of the damping core 2; the displacement sensor assembly 3 comprises a sensor lamination 301 and a sensor winding group 302, a first groove body for installing the sensor lamination 301 is reserved on the side wall of the damping core 2, and the sensor winding group 302 is installed on the base body 1 in a manner of being radially opposite to the sensor lamination 301 and being not in contact with the sensor lamination 301. It can be understood that the vibration displacement of the damping core 2 is measured in real time by the displacement sensor assembly 3, in order to make the electromagnet assembly 4 output electromagnetic force of a suitable magnitude, i.e., the electromagnetic force can be actively controlled, the rotor 11 can be provided with a large electromagnetic force in a wide rotational speed interval, especially a low speed interval, and the damping effect can be improved by the active control.
The electromagnet assembly 4 is located in the inner cavity 102 for outputting an electromagnetic force according to the vibration displacement measured by the displacement sensor assembly 3 to effectively suppress the vibration of the damping core 2, thereby controlling the amplitude of the rotor 11. The electromagnet assembly 4 comprises an electromagnet lamination 401 and an electromagnet winding group 402, a second groove body used for installing the electromagnet lamination 401 is reserved on the side wall of the damping core 2, and the electromagnet winding group 402 is radially opposite to the electromagnet lamination 401 and is installed on the seat body 1 in a non-contact mode with the electromagnet lamination 401. Thus, the electromagnetic force output by the electromagnet assembly 4 can control the vibration of the damping core 2.
The displacement sensor assembly 3 is close to one end of the damping core 2, and the displacement sensor assembly 3 is arranged between one end of the damping core 2 and the electromagnet assembly 4 in the axial direction of the damper.
A plurality of elastic element 8 are distributed along the circumference interval ground of damping core 2, the one end of a plurality of elastic element 8 links to each other with the one end of damping core 2, the other end of a plurality of elastic element 8 links to each other with the axial one end of pedestal 1, elastic element 8 is used for providing the restoring force for damping core 2, the too big vibration range of damping core 2 can be avoided in the setting of elastic element 8 on the one hand, on the other hand elastic element 8 makes damping core 2 can resume initial position when the vibration disappears, and then make rotor 11 position difficult emergence deflect.
According to the active electromagnetic damper 1000 of the embodiment of the invention, when the rotor 11 or other vibration sources cause the damping core 2 to vibrate, the displacement sensor assembly 3 can measure the vibration displacement of the damping core 2 in real time, the signal collector obtains a voltage signal corresponding to the vibration displacement of the damping core 2 through the displacement sensor assembly 3 and transmits the corresponding voltage signal to the arithmetic unit, and the arithmetic unit performs calculation under a certain control strategy (i.e. control algorithm) and outputs the processed voltage signal to the power amplifier. Under the effect of the processed voltage signal, the power amplifier outputs current to the electromagnet assembly 4, the electromagnet assembly 4 outputs electromagnetic force with proper magnitude to the damping core 2 according to the vibration displacement of the damping core 2, and the electromagnetic force is applied to the damping core 2, so that the vibration of the damping core 2 can be effectively inhibited, the effect of controlling the amplitude of the rotor 11 is achieved, and the damping effect is greatly improved by adopting an active control (namely feedback control) mode.
The mass of the damping core 2, the connection stiffness of the elastic element 8, the ball bearing 6 and the connection small shaft 5 are all designed according to the dynamic property of the rotor system where the rotor 11 is located, so that the active electromagnetic damper 1000 according to the embodiment of the present invention can be normally used.
According to the active electromagnetic damper 1000 of the embodiment of the invention, compared with the existing damper of the rotor, the active electromagnetic damper 1000 of the embodiment of the invention adopts an active control mode, outputs electromagnetic force to the damping core 2 through the electromagnet assembly 4, realizes the variable rigidity and damping parameters of the system, realizes the appropriate damping effect to the rotor 11 in a wider rotating speed range, especially in a low rotating speed interval, and solves the problem that the existing damper can not adjust the damping parameters under different rotating speed conditions; meanwhile, an active control (namely feedback control) mode is adopted, so that the damping effect is greatly improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like are intended to mean that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (12)
1. An active electromagnetic damper, comprising:
the seat body is provided with an opening at one axial end and an inner cavity communicated with the opening;
the damping core is coaxially arranged with the rotor, one end of the damping core is axially connected with one end of the rotor, and the other end of the damping core is connected with the other axial end of the seat body, so that the vortex motion of the rotor is inhibited without controlling the rotation of the rotor;
a displacement sensor assembly located in the inner cavity for measuring vibrational displacement of the damping core;
and the electromagnet assembly is positioned in the inner cavity and used for outputting electromagnetic force according to the vibration displacement measured by the displacement sensor assembly so as to effectively inhibit the vibration of the damping core and control the amplitude of the rotor.
2. The active electromagnetic damper of claim 1, further comprising a rotor small shaft and a ball bearing, wherein the rotor small shaft is coaxially disposed with the rotor, one end of the rotor small shaft is fixed to one end of the rotor, and the other end of the rotor small shaft is connected to one end of the damping core through the ball bearing.
3. The active electromagnetic damper as claimed in claim 1, wherein a shaft socket is provided on an inner wall of an end portion of the other end of the seat body; the active electromagnetic damper further comprises a damping core small shaft, the damping core small shaft and the damping core are coaxially arranged, one end of the damping core small shaft is axially fixed relative to one end of the damping core, and the other end of the damping core small shaft is inserted into the shaft socket.
4. The active electromagnetic damper of claim 1, wherein the displacement sensor assembly includes a sensor lamination disposed on the damping core and a sensor winding set mounted on the housing radially opposite the sensor lamination and in non-contact with the sensor lamination.
5. The active electromagnetic damper of claim 1, wherein the electromagnet assembly includes an electromagnet lamination disposed on the damping core and an electromagnet winding set mounted on the housing radially opposite the electromagnet lamination and in non-contact with the electromagnet lamination.
6. The active electromagnetic damper of claim 1, wherein the displacement sensor assembly is proximate to an end of the damping core, the displacement sensor assembly being interposed between the end of the damping core and the electromagnet assembly in an axial direction of the damper.
7. The active electromagnetic damper of claim 6, wherein the seat comprises a first seat and a second seat, the first seat and the second seat are axially inserted and sealed and fixed, the displacement sensor assembly is located in the first seat, the electromagnet assembly is located in the second seat, and one end of the first seat is provided with the opening.
8. The active electromagnetic damper as claimed in claim 1, further comprising a plurality of elastic elements distributed at intervals along a circumferential direction of the damping core, one end of the plurality of elastic elements being connected to one end of the damping core, and the other end of the plurality of elastic elements being connected to one axial end of the seat body.
9. The active electromagnetic damper of claim 1, wherein the inner cavity is filled with a damping medium.
10. The active electromagnetic damper of claim 1, further comprising an FPGA circuit module, wherein the FPGA circuit module is electrically connected to the displacement sensor assembly and the electromagnet assembly, respectively, and the FPGA circuit module is configured to obtain a voltage signal corresponding to the vibration displacement of the damping core through the displacement sensor assembly, process the voltage signal, and output a current to the electromagnet assembly to generate a corresponding electromagnetic force, so as to effectively suppress the vibration of the damping core, thereby controlling the amplitude of the rotor.
11. The active electromagnetic damper of claim 10, wherein the FPGA circuit module comprises a controller, a signal collector, an operator, and a power amplifier, wherein the controller controls the operation of the signal collector, the operator, and the power amplifier, and the signal collector obtains the voltage signal and transmits the voltage signal to the operator; the arithmetic unit calculates the voltage signal under a control strategy, inputs a processed voltage signal to the power amplifier, and the power amplifier outputs current to the electromagnet assembly under the action of the processed voltage signal to generate electromagnetic force.
12. The active electromagnetic damper as claimed in claim 11, further comprising a data acquisition card and a data visualization and storage system, wherein the data acquisition card is configured to acquire the voltage signal corresponding to the vibration displacement and the current output by the power amplifier, and transmit the voltage signal and the current output by the power amplifier to the data visualization and storage system; the data visualization and storage system is electrically connected to the controller.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111298751.2A CN113931969A (en) | 2021-11-04 | 2021-11-04 | Active electromagnetic damper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111298751.2A CN113931969A (en) | 2021-11-04 | 2021-11-04 | Active electromagnetic damper |
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| CN113931969A true CN113931969A (en) | 2022-01-14 |
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| CN202111298751.2A Pending CN113931969A (en) | 2021-11-04 | 2021-11-04 | Active electromagnetic damper |
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| GB1570358A (en) * | 1976-04-28 | 1980-07-02 | Ultra Centrifuge Nederland Nv | Vibration-damping support for a rotor |
| RU2050485C1 (en) * | 1992-11-02 | 1995-12-20 | Центральное конструкторское бюро машиностроения | Damper |
| CN102518738A (en) * | 2011-11-24 | 2012-06-27 | 清华大学 | Slender rod type low-rigidity elastic damping supporting structure |
| CN203362934U (en) * | 2013-07-23 | 2013-12-25 | 山东科技大学 | Active control electromagnetic damper for rotor vibration |
| CN104912996A (en) * | 2015-04-15 | 2015-09-16 | 清华大学 | Mixed damping system and control method thereof |
| CN106353076A (en) * | 2016-07-07 | 2017-01-25 | 大连海事大学 | Tester for determining dynamic characteristic coefficient of squeeze film damper |
| CN211901409U (en) * | 2020-03-24 | 2020-11-10 | 核工业理化工程研究院 | Active control pendulum-type dual-frequency electromagnetic damping structure and damping rotor |
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2021
- 2021-11-04 CN CN202111298751.2A patent/CN113931969A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1530918A (en) * | 1974-12-06 | 1978-11-01 | Teldix Gmbh | Arrangement for damping oscillation |
| GB1570358A (en) * | 1976-04-28 | 1980-07-02 | Ultra Centrifuge Nederland Nv | Vibration-damping support for a rotor |
| RU2050485C1 (en) * | 1992-11-02 | 1995-12-20 | Центральное конструкторское бюро машиностроения | Damper |
| CN102518738A (en) * | 2011-11-24 | 2012-06-27 | 清华大学 | Slender rod type low-rigidity elastic damping supporting structure |
| CN203362934U (en) * | 2013-07-23 | 2013-12-25 | 山东科技大学 | Active control electromagnetic damper for rotor vibration |
| CN104912996A (en) * | 2015-04-15 | 2015-09-16 | 清华大学 | Mixed damping system and control method thereof |
| CN106353076A (en) * | 2016-07-07 | 2017-01-25 | 大连海事大学 | Tester for determining dynamic characteristic coefficient of squeeze film damper |
| CN211901409U (en) * | 2020-03-24 | 2020-11-10 | 核工业理化工程研究院 | Active control pendulum-type dual-frequency electromagnetic damping structure and damping rotor |
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