CN112908658B - Reactor vibration damping method and vibration damping reactor device - Google Patents
Reactor vibration damping method and vibration damping reactor device Download PDFInfo
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- CN112908658B CN112908658B CN202110199626.XA CN202110199626A CN112908658B CN 112908658 B CN112908658 B CN 112908658B CN 202110199626 A CN202110199626 A CN 202110199626A CN 112908658 B CN112908658 B CN 112908658B
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- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
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Abstract
The application relates to a reactor vibration reduction method and a vibration reduction reactor device. In the embodiment of the application, the installation position of the dynamic vibration absorber is the target vibration reduction point of the reactor to be subjected to vibration reduction, the pertinence is stronger, and the vibration of the reactor to be subjected to vibration reduction can be reduced to the greatest extent, so that the technical problem that the existing vibration reduction and noise reduction methods for the dry type air reactor are not ideal in the prior art is solved, and the vibration reduction and noise reduction effects of the dry type air reactor are improved. Meanwhile, the dynamic vibration absorber is low in cost, simple to install and easy to realize, the heat dissipation performance of the to-be-damped reactor cannot be influenced after the dynamic vibration absorber is installed on the to-be-damped reactor, and the vibration and noise reduction effect of the dry type hollow reactor is greatly improved.
Description
Technical Field
The application relates to the technical field of power equipment, in particular to a reactor vibration reduction method and a vibration reduction reactor device.
Background
The dry-type air-core reactor has a coreless structure, light weight, small volume and stable inductance value, and is widely applied to reactive power compensation of a power system and long-distance large-capacity high-voltage direct-current transmission. The dry-type air-core reactor is usually arranged outdoors, the operation environment is severe, the dry-type air-core reactor is in a vibration state for a long time under the action of alternating electromagnetic force and the like, and the problem of noise pollution generated by the dry-type air-core reactor is more prominent. Therefore, how to effectively reduce the radiation noise level of the dry-type air-core reactor becomes a problem to be solved urgently.
The current methods for damping and reducing noise of dry air reactors mainly include, for example: glue is injected between the wires, a large mass conductor is adopted or the encapsulated current phase is changed, etc. However, the heat dissipation performance of the dry-type air-core reactor is affected by injecting glue between the wires, the production cost of the dry-type air-core reactor is increased by adopting a large-mass conductor, and the change of the encapsulated current phase is difficult to realize in actual work. Therefore, the current vibration and noise reduction method aiming at the dry type air-core reactor is not ideal.
Disclosure of Invention
In view of the above, it is necessary to provide a reactor damping method and a damping reactor device in view of the above technical problems.
In a first aspect, a reactor vibration damping method is provided, the method comprising:
determining a plurality of target vibration damping points of a reactor to be damped;
respectively arranging a mounting hole at each of the target vibration damping points;
and a dynamic vibration absorber is arranged on each mounting hole so as to damp the vibration of the reactor to be damped.
In an alternative embodiment of the present application, determining a plurality of target damping points of a reactor to be damped comprises: determining target damping frequency of a reactor to be damped; determining a plurality of vibration points on the surface of the reactor to be damped under the target damping frequency; and determining the vibration point of which the vibration amplitude is larger than a preset threshold value in the plurality of vibration points as a target vibration reduction point.
In an alternative embodiment of the present application, determining a target damping frequency of a reactor to be damped includes: acquiring the current amplitude and the current frequency of the working current of the reactor to be damped; and determining the target vibration reduction frequency of the reactor to be subjected to vibration reduction according to the current amplitude and the current frequency.
In an alternative embodiment of the present application, determining a plurality of vibration points of a surface of a reactor to be damped at a target damping frequency includes: determining a plurality of first vibration points of the inner surface of the reactor to be damped at a target damping frequency; a plurality of second vibration points of the outer surface of the reactor to be damped are determined at the target damping frequency.
In an optional embodiment of the present application, the method further comprises: acquiring the damping characteristic and the excitation frequency of the dynamic vibration absorber; and correcting the structure of the dynamic vibration absorber according to the damping characteristic, the excitation frequency and the target vibration reduction frequency.
In an alternative embodiment of the present application, modifying the structure of the dynamic vibration absorber according to the damping characteristic, the excitation frequency and the target vibration damping frequency includes: and if the difference value between the excitation frequency and the target vibration reduction frequency is greater than the preset frequency and/or the damping characteristic of the dynamic vibration absorber does not conform to the preset damping model, correcting the structure of the dynamic vibration absorber.
In a second aspect, there is provided a vibration damping reactor device including:
a reactor;
the mounting holes are formed in the target vibration damping points;
the dynamic vibration absorbers are respectively arranged in each mounting hole;
in an alternative embodiment of the present application, the dynamic vibration absorber is made of a non-metallic material.
In an alternative embodiment of the present application, the envelope of the reactor includes an inner surface proximate to the axis of the reactor and an outer surface distal from the axis of the reactor; the inner surface and the outer surface are both provided with mounting holes.
In an optional embodiment of the present application, the hole wall of the mounting hole is provided with a first thread; the vibration absorber is provided with a second thread, and the first thread is matched with the second thread.
According to the reactor vibration reduction method, a plurality of target vibration measurement points of the reactor to be subjected to vibration reduction are determined, then mounting holes are formed in the target vibration reduction points, and finally a dynamic vibration absorber is mounted in each mounting hole, so that vibration reduction of the reactor to be subjected to vibration reduction is achieved. The installation position of the dynamic vibration absorber in the embodiment of the application is the target vibration reduction point of the reactor to be subjected to vibration reduction, the pertinence is stronger, and the vibration of the reactor to be subjected to vibration reduction can be reduced to the greatest extent, so that the technical problem that the existing vibration reduction and noise reduction method for the dry type air reactor is not ideal in the prior art is solved, and the vibration reduction and noise reduction effect of the dry type air reactor is improved.
Meanwhile, the dynamic vibration absorber is low in cost, simple to install and easy to realize, and the heat dissipation performance of the to-be-damped reactor cannot be influenced after the to-be-damped reactor is installed, so that the vibration and noise reduction effect of the dry type air reactor is greatly improved.
Drawings
FIG. 1 is a schematic flow chart of a damping method for a reactor according to an embodiment;
FIG. 2 is a graph of the vibration of a reactor in one embodiment;
FIG. 3 is a schematic flow chart of a damping method for a reactor according to an embodiment;
FIG. 4 is a schematic flow chart of a damping method for a reactor according to an embodiment;
FIG. 5 is a schematic flow chart of a damping method for a reactor according to an embodiment;
FIG. 6 is a flowchart illustrating a method for damping vibration of a reactor according to an embodiment;
FIG. 7 is a schematic configuration diagram of a vibration damping reactor device according to an embodiment;
FIG. 8 is a schematic structural view of a damper reactor device mounting hole in one embodiment;
fig. 9 is a schematic diagram of a structure of a reactor of the vibration damping reactor device in one embodiment.
Description of the reference numerals:
10. a vibration damping reactor device; 100. a reactor; 110. an inner surface; 120. an outer surface; 200. mounting holes; 300. provided is a dynamic vibration absorber.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The dry-type air-core reactor has a coreless structure, light weight, small volume and stable inductance value, and is widely applied to reactive power compensation of a power system and long-distance large-capacity high-voltage direct-current transmission. The dry-type air-core reactor is usually arranged outdoors, the operation environment is severe, the dry-type air-core reactor is in a vibration state for a long time under the action of alternating electromagnetic force and the like, and the problem of noise pollution generated by the dry-type air-core reactor is more prominent. Therefore, how to effectively reduce the radiation noise level of the dry-type air-core reactor becomes a problem to be solved urgently. The current methods for damping and reducing noise of dry air reactors mainly include, for example: glue is injected between the wires, a large mass conductor is adopted or the encapsulated current phase is changed, etc. However, the heat dissipation performance of the dry-type air-core reactor is affected by injecting glue between the wires, the production cost of the dry-type air-core reactor is increased by adopting a large-mass conductor, and the change of the encapsulated current phase is difficult to realize in actual work. Therefore, the current vibration and noise reduction method aiming at the dry type air-core reactor is not ideal.
In view of this, the embodiment of the present application provides a method for damping vibration of a reactor, which includes determining a plurality of target vibration measurement points of a to-be-damped reactor, then forming mounting holes in the target vibration measurement points, and finally mounting a dynamic vibration absorber in each mounting hole to realize vibration damping of the to-be-damped reactor. In the embodiment of the application, the installation position of the dynamic vibration absorber is the target vibration reduction point of the reactor to be subjected to vibration reduction, the pertinence is stronger, and the vibration of the reactor to be subjected to vibration reduction can be reduced to the greatest extent, so that the technical problem that the existing vibration reduction and noise reduction methods for the dry type air reactor are not ideal in the prior art is solved, and the vibration reduction and noise reduction effects of the dry type air reactor are improved.
Meanwhile, the dynamic vibration absorber is low in cost, simple to install and easy to realize, and the heat dissipation performance of the to-be-damped reactor cannot be influenced after the to-be-damped reactor is installed, so that the vibration and noise reduction effect of the dry type air reactor is greatly improved.
Referring to fig. 1, an embodiment of the present application provides a method for damping vibration of a reactor, and the following embodiment takes the example that the method for damping vibration of a reactor to be damped as an example, and the method includes the following steps 101 to 103:
The body of the reactor to be damped is an encapsulation, the encapsulation is formed by winding a lead coated with an epoxy layer, an alternating electromagnetic field can be generated when alternating current is conducted to the lead, the reactor to be damped can vibrate under the action of magnetic field force generated by the alternating electromagnetic field, and the encapsulation is a main vibration object of vibration. In this embodiment, alternating current may be applied to the reactor to be damped, or the reactor to be damped may be placed in a test alternating electromagnetic field, and then the envelope surface may be measured by a vibration measuring device, such as a laser vibration meter, an acceleration sensor, or the like, to determine a target damping point. The target vibration attenuation point is a region with the most intense vibration, namely a vibration point with vibration times greater than a first preset threshold value and vibration amplitude greater than a second preset threshold value in unit time. In addition, partial other areas needing vibration reduction or monitoring can be determined as target vibration reduction points according to actual needs.
And 102, respectively forming a mounting hole in each of the target vibration damping points.
After the multiple target vibration attenuation points are determined and obtained, holes are punched in the encapsulation surface of the to-be-damped reactor according to the positions of the multiple target vibration attenuation points, and then the mounting holes corresponding to the multiple target vibration attenuation points one to one can be obtained. It should be noted that the mounting hole in this embodiment may be a through hole, or may also be a non-through hole, and the present embodiment is not particularly limited, and only needs to satisfy the function of providing a mounting space for the dynamic vibration absorber.
And 103, mounting a dynamic vibration absorber on each mounting hole to damp the vibration of the reactor to be damped.
And installing a dynamic vibration absorber on the installation hole determined through the steps, and absorbing the vibration generated on the surface of the encapsulation by the dynamic vibration absorber once the reactor to be subjected to vibration reduction vibrates so as to greatly weaken the vibration generated on the surface of the reactor to be subjected to vibration reduction. The dynamic vibration absorber in the embodiment can be a self-adaptive dynamic vibration absorber, the self-adaptive dynamic vibration absorber changes the natural frequency through self-adaptive adjustment of parameters to track the external excitation frequency, so that the vibration of the reactor to be damped is reduced on a large bandwidth, the defect that the effective bandwidth of the vibration absorber is too narrow can be effectively overcome, and the damping bandwidth of the embodiment of the application is improved. This dynamic vibration absorber still can be for becoming quality dynamic vibration absorber, has a variable mass unit in the variable mass dynamic vibration absorber, can change the quality of bump leveller through the variable mass unit and be natural frequency to obtain great effective bandwidth, thereby improve the damping bandwidth of this application embodiment.
According to the reactor vibration reduction method, a plurality of target vibration measurement points of the reactor to be subjected to vibration reduction are determined, then mounting holes are formed in the target vibration reduction points, and finally a dynamic vibration absorber is mounted in each mounting hole, so that vibration reduction of the reactor to be subjected to vibration reduction is achieved. In the embodiment of the application, the installation position of the dynamic vibration absorber is the target vibration reduction point of the reactor to be subjected to vibration reduction, the pertinence is stronger, and the vibration of the reactor to be subjected to vibration reduction can be reduced to the greatest extent, so that the technical problem that the existing vibration reduction and noise reduction methods for the dry type air reactor are not ideal in the prior art is solved, and the vibration reduction and noise reduction effects of the dry type air reactor are improved.
Meanwhile, the dynamic vibration absorber is low in cost, simple to install and easy to realize, the heat dissipation performance of the to-be-damped reactor cannot be influenced after the dynamic vibration absorber is installed on the to-be-damped reactor, and the vibration and noise reduction effect of the dry type hollow reactor is greatly improved.
Referring to fig. 2, it is a vibration frequency response curve of the reactor 100 with a natural frequency of 420Hz under different conditions, where the abscissa is the excitation frequency of the vibration excitation signal of the reactor to be damped, and the ordinate is the vibration response, which may be the acceleration, the speed, the displacement, or the ratio of the above parameters to the intensity or the magnitude of the excitation signal; wherein, curve 1 is the reactor vibration curve without the dynamic vibration absorber 300 installed; curve 2 is the reactor vibration curve with the dynamic vibration absorber 300 installed; curve 3 is a vibration curve of the reactor in which the dynamic-vibration absorber 300 is installed at the target vibration-damping point in the embodiment of the present application. As is apparent from fig. 8, mounting the dynamic vibration absorber 300 at a target vibration damping point effectively reduces the amplitude of vibration of the reactor 100 at the natural frequency of the reactor, thereby greatly reducing the vibration of the reactor 100.
Referring to fig. 3, in an alternative embodiment of the present application, step 101 includes the following steps 301-303:
and 301, determining the target vibration reduction frequency of the reactor to be subjected to vibration reduction.
The method comprises the steps of electrifying alternating current to a reactor to be damped, generating an electromagnetic field by a coil in the reactor to be damped, carrying out vibration detection on the encapsulation surface of the reactor to be damped through vibration detection equipment such as a vibration detector and the like to obtain the vibration frequency of the reactor to be damped under the action of the magnetic field force of the electromagnetic field, determining the frequency with stronger vibration as the target vibration damping frequency, and obtaining the target vibration damping frequency with stronger pertinence and more accuracy.
And 302, determining a plurality of vibration points of the surface of the reactor to be damped at the target damping frequency.
And (3) electrifying alternating current to the reactor to be damped, so that the reactor to be damped vibrates under the action of the magnetic field force, measuring the vibration distribution on the surface of the reactor to be damped through vibration measuring equipment to determine the position with larger vibration amplitude, namely all vibration points corresponding to the target damping frequency in the step 301, wherein the vibration amplitudes of different areas on the surface of the reactor to be damped are different.
Determining to obtain a plurality of vibration points through step 302, wherein the vibration frequency of each vibration point is the target vibration reduction frequency obtained in step 201, each vibration point corresponds to a vibration amplitude, the vibration amplitudes of the vibration points are different, the vibration point with the vibration amplitude larger than a preset threshold value in the plurality of vibration points is determined as the target vibration reduction point, and then a dynamic vibration absorber is installed at the position of the target vibration reduction point.
According to the equivalent mass identification method of the multi-degree-of-freedom vibration system, when the dynamic vibration absorber is installed at the vibration point with the amplitude larger than the preset threshold value, smaller modal equivalent mass can be obtained, and the vibration reduction effect is best, so that the vibration point with the amplitude larger than the preset threshold value is selected from the plurality of vibration points to serve as the target vibration reduction point, the number of installed dynamic vibration absorbers is reduced, and the vibration reduction cost is reduced on the premise of ensuring the vibration reduction effect. Meanwhile, the positions of other non-target vibration reduction points can provide installation space for the dynamic vibration absorber, and the vibration absorption effect is reduced due to the fact that adjacent dynamic vibration absorbers are prevented from being contacted.
Referring to fig. 4, in an alternative embodiment of the present application, step 301 includes the following steps 401-402:
And working current flows through the vibration reduction reactor when the vibration reduction reactor works, and the amplitude and the frequency of the working current correspond to the amplitude and the frequency of the vibration reduction reactor. The current amplitude and the current frequency can be obtained by simply calculating and determining the current amplitude and the current frequency directly according to the current parameters of the power supply source, and the current amplitude and the current frequency of the working current can also be obtained by combining the current acquisition equipment and the current analysis equipment for testing. The determination method for determining the current amplitude and the current frequency is not limited in any way, and may be specifically selected or set according to actual situations.
And 402, determining the target vibration reduction frequency of the reactor to be subjected to vibration reduction according to the current amplitude and the current frequency.
For the fixed equipment, that is, the reactor to be damped in this embodiment, when the current amplitude and the current frequency are not changed, the frequency and the amplitude of the magnetic field force borne by the reactor to be damped are also determined. According to ampere's law, the magnetic field force is proportional to the magnetic induction and the current, and for the reactor, the magnetic induction is proportional to the current flowing through, so the magnetic field force applied to the reactor is proportional to the square of the current flowing through, and can be expressed as:
F＝Ki 1 2 (t) (1)
(1) Wherein F is the magnetic field force applied to the reactor to be damped, i 1 And (t) is the current flowing through the reactor to be damped, and K is a linear coefficient. Wherein, when the current flowing through the reactor to be damped is a single frequency, i 1 (t) can be expressed by the following formula (2):
(2) In the formula I 1 Is the current amplitude of the operating current, f 1 In order to be able to operate at the current frequency,
the initial phase of the working current, t is time.
Substituting the formula (2) into the formula (1) can obtain a formula (3) for calculating the magnetic field force F borne by the to-be-damped reactor when the single-frequency current flows:
(3) In the formula, F is the magnetic field force borne by the reactor to be damped, K is the linear coefficient, I 1 Is the current amplitude of the operating current, f 1 Is the current frequency of the operating current and,
the initial phase of the working current, t is time.
Similarly, if the operating current is at frequency f 1 And f 2 When harmonic currents of two frequencies are superposed, the magnetic field force F borne by the to-be-damped reactor is as follows:
(4) In the formula, F is the magnetic field force borne by the to-be-damped reactor, K is the linear coefficient, and I 1 And I 2 Amplitude of two harmonic currents, f 1 And f 2 Respectively for the frequencies of the two operating currents,
and
the initial phases of the two harmonic currents are respectively, and t is time.
The frequency spectrum of the magnetic field force contains not only the frequency-doubled component 2f of the excitation current 1 And 2f 2 Also including the sum frequency f of the excitation current frequency 1 +f 2 Sum and difference frequency f 1 -f 2 And the relative magnitude of the frequency component of each magnetic field force can also be calculated according to the magnitude of the current amplitude I of each frequency. When the frequency quantity of the exciting current is more, the frequency component of the magnetic field force with the maximum amplitude can be obtained through calculation by the same method, so that the target frequency to be damped is determined.
In the embodiment, the target vibration reduction frequency of the reactor to be subjected to vibration reduction can be obtained through calculation of the current amplitude and the current frequency of the working current, a vibration test is not needed, the efficiency is higher, and the working efficiency of the reactor vibration reduction method provided by the embodiment of the application can be further improved.
Of course, in an alternative embodiment of the present application, the target damping frequency of the reactor to be damped can be determined through experimental tests. Measuring the vibration intensity or the noise intensity of different areas on the surface of the reactor to be damped in the operation process, and on the first hand, determining the vibration frequency corresponding to the vibration point with the vibration intensity larger than a preset vibration intensity threshold value as the target vibration damping frequency; in the second aspect, the vibration frequency corresponding to the vibration point having the noise intensity greater than the preset noise intensity may be determined as the target vibration reduction frequency. The result obtained through the test is closer to the actual running state, and the accuracy of the reactor vibration reduction method provided by the embodiment of the application can be further improved.
Referring to fig. 5, in an alternative embodiment of the present application, step 302 includes the following steps 501-502:
And 502, determining a plurality of second vibration points of the outer surface of the reactor to be damped under the target damping frequency.
The encapsulation of the reactor to be damped comprises an inner surface and an outer surface, in the embodiment, vibration points are respectively detected on the inner surface and the outer surface of the reactor to be damped through steps 501 and 502, so that a plurality of first vibration points on the inner surface and a plurality of second vibration points on the outer surface of the reactor to be damped are respectively determined, and the plurality of first vibration points and the plurality of second vibration points are taken as a plurality of vibration points on the surface of the reactor to be damped. In the embodiment, the vibration points of the reactor to be damped are respectively determined from the two dimensions of the inner surface and the outer surface, and the dynamic vibration absorbers are subsequently installed on the inner surface and the outer surface, so that the damping effect of the reactor damping method in the embodiment of the application can be further improved.
Referring to fig. 6, in an alternative embodiment of the present application, the method further includes steps 601-602:
and 601, acquiring the damping characteristic and the excitation frequency of the dynamic vibration absorber.
In this embodiment, the dynamic vibration absorber may be tested for damping characteristics by a cantilever beam method, a free attenuation method, an impedance method, and the like, where the damping characteristics in this embodiment are used to represent the vibration damping performance of the dynamic vibration absorber, and may be, for example, a damping coefficient. The excitation frequency refers to the frequency of the excitation force output by the dynamic vibration absorber, and can be determined through factory data, an excitation frequency test, theoretical calculation and the like provided by a dynamic vibration absorber manufacturer.
The dynamic vibration absorber is also accompanied with damping in the working process, and once the damping of the dynamic vibration absorber is overlarge, the dynamic vibration absorber consumes more energy under the action of resistance, and the vibration reduction effect is weaker and weaker. Meanwhile, the closer the excitation frequency is to the target vibration reduction frequency, the better the vibration reduction effect is, so that the structure of the dynamic vibration absorber can be corrected based on the damping characteristic, the excitation frequency and the target vibration reduction frequency of the dynamic vibration absorber, so that the damping of the dynamic vibration absorber is reduced to the minimum, the closer the excitation frequency is to the target vibration reduction frequency, even the same as the target vibration reduction frequency, the vibration reduction effect of the dynamic vibration absorber is improved, and the vibration reduction effect of the reactor vibration reduction method provided by the embodiment of the application is further improved.
In a particular embodiment, step 602 includes: and if the difference value between the excitation frequency and the target vibration reduction frequency is greater than the preset frequency and/or the damping characteristic of the dynamic vibration absorber does not conform to the preset damping model, correcting the structure of the dynamic vibration absorber.
The preset frequency may be specifically set according to an actual situation, for example, may be 0Hz, 0.1Hz, and the like, and the embodiment is not particularly limited. If the damping characteristic is a damping coefficient, the corresponding damping model may be a damping coefficient not greater than a preset damping coefficient, and similarly, the preset damping model may be specifically set according to an actual situation, and the embodiment is not limited at all. In this embodiment, a preset frequency and a preset damping model are set, once the difference between the excitation frequency and the target vibration damping frequency is greater than the preset frequency, or the damping characteristic of the dynamic vibration absorber is not in accordance with the preset damping model, the structure of the dynamic vibration absorber is corrected until the difference between the excitation frequency and the target vibration damping frequency is less than or equal to the preset frequency, and meanwhile, the damping characteristic of the dynamic vibration absorber conforms to the preset damping model, so that the vibration absorption effect of the dynamic vibration absorber is improved, and the vibration absorption effect of the reactor vibration damping method provided by the embodiment of the application is further improved.
It should be understood that, although the steps in the flowchart are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not limited to being performed in the exact order illustrated and, unless explicitly stated herein, may be performed in other orders. Moreover, at least some of the steps in the figures may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of performing the steps or stages is not necessarily sequential, but may be performed alternately or alternatively with other steps or at least some of the steps or stages in other steps.
Referring to fig. 7 and 8 together, an embodiment of the present application provides a vibration damping reactor device 10 including: reactor 100, mounting hole 200, and dynamic vibration absorber 300.
The reactor 100, the reactor 100 is a reactor 100 to be damped, such as a dry-type air-core reactor 100, and the like, and the present embodiment does not limit the specific type of the reactor 100 at all, and can be specifically selected according to the actual situation.
A plurality of mounting holes 200, the number of the mounting holes 200 being plural, the plurality of mounting holes 200 being opened at a target damping point in the damping method of the reactor 100 as described above. The mounting hole 200 may be circular, square or any other shape, and this embodiment is not particularly limited, and may be specifically limited according to the actual situation.
A plurality of dynamic-vibration absorbers 300, the number of the dynamic-vibration absorbers 300 being a plurality, a plurality of dynamic-vibration absorbers 300 being respectively provided in each of the mounting holes 200, one dynamic-vibration absorber 300 being provided corresponding to one of the mounting holes 200, the dynamic-vibration absorbers 300 being adapted to absorb vibrations of the reactor 100 occurring under the influence of a magnetic field force to improve the operational stability of the reactor 100 and to reduce noise pollution due to the vibrations. The dynamic vibration absorber 300 in this embodiment may be an adaptive dynamic vibration absorber 300, and the adaptive dynamic vibration absorber 300 changes the natural frequency by adaptively adjusting its own parameters to track the external excitation frequency, so as to reduce the vibration of the reactor 100 to be damped in a larger bandwidth, and can effectively overcome the defect that the effective bandwidth of the vibration absorber is too narrow, and improve the damping bandwidth of the embodiment of the present application. The dynamic vibration absorber 300 can also be a variable mass dynamic vibration absorber 300, and the variable mass dynamic vibration absorber 300 is provided with a variable mass unit, so that the mass, namely the natural frequency, of the vibration absorber can be changed through the variable mass unit, and a larger effective bandwidth is obtained, and the vibration reduction bandwidth of the embodiment of the application is improved. The plurality of dynamic vibration absorbers 300 may be fixed to the mounting hole 200 by fastening means such as bolts to improve the stability of the dynamic vibration absorbers 300 and further improve the vibration damping effect of the vibration damping reactor device 10 according to the embodiment of the present application.
The embodiment of the present application provides a vibration damping reactor device 10 including: the reactor 100, the mounting hole 200 and the dynamic-vibration absorber 300, the dynamic-vibration absorber 300 is located at the position where the surface of the reactor 100 vibrates most strongly, and once the reactor 100 vibrates, the dynamic-vibration absorber 300 can absorb the vibration of the reactor 100 generated by the magnetic field force to improve the operation stability of the reactor 100 and reduce noise pollution caused by the vibration.
In an alternative embodiment of the present application, the dynamic vibration absorber 300 is made of a non-metallic material, so that the problem that the dynamic vibration absorber 300 induces eddy currents in the working electromagnetic field to affect the normal operation of the reactor 100 can be effectively avoided, the working stability of the reactor 100 can be effectively improved, and the working stability of the vibration-damping reactor apparatus 10 provided in the embodiment of the present application can be further improved. The non-metal material in this embodiment may be any of rigid plastics, polymer materials, and the like, and this embodiment is not limited at all and may be specifically selected according to actual conditions.
Referring to fig. 9, in an alternative embodiment of the present application, the envelope of reactor 100 includes an inner surface 110 near the axis of reactor 100 and an outer surface 120 away from the axis of reactor 100; the inner surface 110 and the outer surface 120 are both provided with mounting holes 200. In this embodiment, the mounting holes 200 are formed in both the inner surface 110 and the outer surface 120, that is, the dynamic vibration absorbers 300 are mounted on both the inner surface 110 and the outer surface 120 of the reactor 100, so that the vibration of the reactor 100 is absorbed from two dimensions of the inner surface 110 and the outer surface 120, and the vibration reduction effect of the vibration reduction reactor device 10 provided by the embodiment of the present application can be further improved.
In an alternative embodiment of the present application, the hole wall of the mounting hole 200 is provided with a first thread; the vibration absorber is provided with the second threads, and the first threads are matched with the second threads, so that the stability of the dynamic vibration absorber 300 can be effectively improved, the working performance of the dynamic vibration absorber 300 can be improved, and the vibration reduction effect of the vibration reduction reactor device 10 provided by the embodiment of the application can be improved.
All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A reactor vibration damping method, characterized by comprising:
determining target vibration reduction frequency of a reactor to be subjected to vibration reduction, and determining a plurality of target vibration reduction points of the reactor to be subjected to vibration reduction according to the target vibration reduction frequency;
respectively arranging a mounting hole on each of the target vibration damping points;
a dynamic vibration absorber is arranged on each mounting hole to damp the to-be-damped reactor;
acquiring the excitation frequency of the dynamic vibration absorber, and if the difference value between the excitation frequency and the target vibration reduction frequency is greater than a preset frequency, correcting the structure of the dynamic vibration absorber, and/or acquiring the damping characteristic of the dynamic vibration absorber, and if the damping characteristic does not conform to a preset damping model, correcting the structure of the dynamic vibration absorber.
2. The reactor damping method according to claim 1, characterized in that the determining a plurality of target damping points of the reactor to be damped according to the target damping frequency includes:
determining a plurality of vibration points of the surface of the reactor to be damped at the target damping frequency;
and determining the vibration point of which the vibration amplitude is larger than a preset threshold value in the plurality of vibration points as the target vibration reduction point.
3. The reactor vibration damping method according to claim 1, characterized in that the determining a target vibration damping frequency of a reactor to be vibration damped includes:
acquiring the current amplitude and the current frequency of the working current of the reactor to be damped;
and determining the target vibration reduction frequency of the reactor to be subjected to vibration reduction according to the current amplitude and the current frequency.
4. The reactor vibration damping method according to claim 2, wherein the determining a plurality of vibration points of the surface of the reactor to be damped at the target vibration damping frequency includes:
determining a plurality of first vibration points of the inner surface of the reactor to be damped at the target damping frequency;
and determining a plurality of second vibration points of the outer surface of the reactor to be damped at the target damping frequency.
5. The reactor vibration damping method according to claim 1, characterized in that the target vibration damping frequency is obtained by applying alternating current to the reactor to be vibration damped.
6. The reactor vibration damping method according to claim 1, characterized in that the dynamic vibration absorber is an adaptive dynamic vibration absorber or a variable mass dynamic vibration absorber.
7. A vibration damping reactor device characterized by comprising:
a reactor;
the mounting holes are respectively formed in each target vibration damping point;
the dynamic vibration absorbers are respectively arranged in each mounting hole; and the dynamic vibration absorber performs structural correction under the condition that the difference value between the excitation frequency and the target vibration reduction frequency of the reactor is greater than a preset frequency and/or the damping characteristic does not accord with a preset damping model.
8. The vibration damping reactor device according to claim 7, characterized in that the dynamic vibration absorber is made of a non-metallic material.
9. The vibration damping reactor device according to claim 7, characterized in that the envelope of the reactor includes an inner surface close to the reactor axis center and an outer surface away from the reactor axis center;
the mounting holes are formed in the inner surface and the outer surface.
10. The vibration damping reactor device according to claim 7, characterized in that a hole wall of the mounting hole is provided with a first thread;
the vibration absorber is provided with a second thread, and the first thread is matched with the second thread.
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