CN204004126U - Planar unsymmetrical electromagnetic damper - Google Patents
Planar unsymmetrical electromagnetic damper Download PDFInfo
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- CN204004126U CN204004126U CN201420417755.7U CN201420417755U CN204004126U CN 204004126 U CN204004126 U CN 204004126U CN 201420417755 U CN201420417755 U CN 201420417755U CN 204004126 U CN204004126 U CN 204004126U
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- permanent magnet
- tabular permanent
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- lower floor
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Abstract
The utility model relates to electromagnetic damper, specifically a kind of planar unsymmetrical electromagnetic damper.The utility model has solved the less problem of conventional planar electromagnetic damper damping force.Planar unsymmetrical electromagnetic damper comprises primary and secondary; Described elementary upper strata yoke plate, lower floor's yoke plate, the tabular permanent magnet in a n upper strata, the tabular permanent magnet of a n+1 lower floor of comprising; The lower face first half of i the tabular permanent magnet in upper strata and the upper plate surface of i the tabular permanent magnet of lower floor are latter half of just right, and the lower face of i the tabular permanent magnet in upper strata and the upper plate surface of i the tabular permanent magnet of lower floor opposite polarity magnetic pole strength each other; The lower face of i the tabular permanent magnet in upper strata is latter half of just right with upper plate surface first half i+1 the tabular permanent magnet of lower floor, and the lower face of i the tabular permanent magnet in upper strata and the upper plate surface of i+1 the tabular permanent magnet of lower floor are the magnetic pole strength that polarity is identical.The utility model is applicable to the fields such as space flight, aviation, military project, firearms, automobile, electric power and building.
Description
Technical field
The utility model relates to electromagnetic damper, specifically a kind of planar unsymmetrical electromagnetic damper.
Background technique
At present, damper can be divided into spring-damper, viscous damper, electromagnetic damper according to working principle.Wherein, spring-damper ubiquity is aging problem easily, the problem that viscous damper ubiquity is difficult in maintenance.Compared to spring-damper and viscous damper, electromagnetic damper is not easy aging and is more convenient to safeguard, therefore its application is more extensive.Traditional plane electromagnetic damper is made up of primary and secondary.Described elementaryly formed by upper strata yoke plate 1, lower floor's yoke plate 2, the tabular permanent magnet 3 in a n upper strata, the tabular permanent magnet 4 of a n lower floor.The tabular permanent magnet in upper strata is fixed on the lower face of upper strata yoke plate, and the tabular permanent magnet of lower floor is fixed on the upper plate surface of lower floor's yoke plate.The tabular permanent magnet of the tabular permanent magnet in upper strata and lower floor is common forms upper and lower symplex structure, and the magnetic pole correspondence rule of the tabular permanent magnet in upper strata and the tabular permanent magnet of lower floor is N-S-N-S correspondence rule.Under N-S-N-S correspondence rule, the tabular permanent magnet of the tabular permanent magnet in upper strata and lower floor produces primary magnetic field jointly, and the primary magnetic field magnetic line of force distributes as shown in Figure 1.Describedly secondaryly be generally copper coin or aluminium sheet by sheet metal 5() form.Sheet metal is arranged in the air gap between the tabular permanent magnet of the tabular permanent magnet in upper strata and lower floor movably.When work, sheet metal moves and cuts the primary magnetic field magnetic line of force in air gap, makes to produce eddy current according to Lenz's law in sheet metal, and then produces the new magnetic field that hinders former changes of magnetic field.Finally, under the acting in conjunction of new magnetic field, eddy current, sheet metal motion, on sheet metal, produce damping force (damping force hinders the motion of sheet metal, and the direction of damping force is contrary with the moving direction of sheet metal).The formula of damping force is as follows:
（1）；
In formula (1): df is the suffered damping force of eddy current unit in sheet metal; DB is the Magnetic flux density of sheet metal position; I is the electric current [strength of eddy current unit in sheet metal; Dl is the unit length of the circulation path of eddy current unit in sheet metal.
Known according to formula (1), the factor that determines the damping force size producing on sheet metal is the electric current [strength of eddy current unit in the Magnetic flux density of sheet metal position and sheet metal.And the formula of the electric current [strength of eddy current unit is as follows in sheet metal:
（2）；
In formula (2): i is the electric current [strength of eddy current unit in sheet metal; R is the resistance of eddy current flow warp in sheet metal;
the primary magnetic field variance ratio suffering from while moving in air gap for sheet metal.
Known according to formula (2), the factor that determines the electric current [strength of eddy current unit in sheet metal is the primary magnetic field variance ratio that the resistance of eddy current flow warp in sheet metal and sheet metal suffer from while moving in air gap.Because sheet metal adopts copper coin or the aluminium sheet of low-resistivity conventionally, in sheet metal, the resistance of eddy current flow warp is normally constant.Therefore, do not changing under the prerequisite of the material of sheet metal, shape, movement velocity, the damping force producing on sheet metal if increase, certainly will need to change the distribution character of primary magnetic field, to improve the primary magnetic field variance ratio suffering from when sheet metal moves in air gap.
Practice shows, traditional plane electromagnetic damper is because self structure is limit, there are the following problems: one, due to the upper and lower symplex structure of elementary employing, and elementary magnetic pole correspondence rule adopts N-S-N-S correspondence rule, cause the primary magnetic field magnetic line of force comparatively equably through the air gap at sheet metal place, as shown in Figure 1.Its two, due to the single sheet metal of secondary employing composition, the primary magnetic field variance ratio that sheet metal suffers from is only relevant with the position that sheet metal itself moves, the damping force that causes producing on sheet metal is passive generation completely.And the primary magnetic field variance ratio that above-mentioned two kinds of reasons suffer from while all causing sheet metal to move in air gap is less, causes thus the eddy current that produces in sheet metal less, thereby cause the damping force that produces on sheet metal less.Based on this, be necessary to invent a kind of brand-new electromagnetic damper, to solve the less problem of conventional planar electromagnetic damper damping force.
Summary of the invention
The utility model, in order to solve the less problem of conventional planar electromagnetic damper damping force, provides a kind of planar unsymmetrical electromagnetic damper.
The utility model is to adopt following technological scheme to realize: planar unsymmetrical electromagnetic damper, comprises primary and secondary; Described elementary upper strata yoke plate, lower floor's yoke plate, the tabular permanent magnet in a n upper strata, the tabular permanent magnet of a n+1 lower floor of comprising; Described secondary sheet metal, the lamellar permanent magnet of comprising; Wherein, lower floor's yoke plate and upper strata yoke plate are parallel to each other, and the lower face of the upper plate surface of lower floor's yoke plate and upper strata yoke plate is facing each other; The upper plate surface of the tabular permanent magnet in upper strata and lower face be opposite polarity magnetic pole strength each other; The upper plate surface of the tabular permanent magnet of lower floor and lower face be opposite polarity magnetic pole strength each other; The upper plate surface of n the tabular permanent magnet in upper strata is all fixed with the lower face of upper strata yoke plate, and n the tabular permanent magnet in upper strata by forward direction after successively next-door neighbour arrange; The upper plate surface of adjacent two tabular permanent magnets in upper strata is opposite polarity magnetic pole strength each other; The lower face of n+1 the tabular permanent magnet of lower floor is all fixed with the upper plate surface of lower floor yoke plate, and n+1 the tabular permanent magnet of lower floor by forward direction after successively next-door neighbour arrange; The lower face of the tabular permanent magnet of adjacent Liang Ge lower floor opposite polarity magnetic pole strength each other; The lower face first half of i the tabular permanent magnet in upper strata and the upper plate surface of i the tabular permanent magnet of lower floor are latter half of just right, and the lower face of i the tabular permanent magnet in upper strata and the upper plate surface of i the tabular permanent magnet of lower floor opposite polarity magnetic pole strength each other; The lower face of i the tabular permanent magnet in upper strata is latter half of just right with upper plate surface first half i+1 the tabular permanent magnet of lower floor, and the lower face of i the tabular permanent magnet in upper strata and the upper plate surface of i+1 the tabular permanent magnet of lower floor are the magnetic pole strength that polarity is identical; The lower face of n the tabular permanent magnet in upper strata all flushes, and the common formation of the lower face of n the tabular permanent magnet in upper strata the first plane; The upper plate surface of n+1 the tabular permanent magnet of lower floor all flushes, and the common formation of the upper plate surface of n+1 the tabular permanent magnet of lower floor the second plane; Between the second plane and the first plane, be provided with air gap; Sheet metal and upper strata yoke plate are parallel to each other, and sheet metal is arranged in air gap movably; The rear plate face of lamellar permanent magnet and the front-end face of sheet metal are fixed; N is positive integer; I is positive integer, and 1≤i≤n.
When work, n the tabular permanent magnet in upper strata and n+1 the upper and lower dissymmetrical structure of the common formation of the tabular permanent magnet of lower floor, and the magnetic pole correspondence rule of n the tabular permanent magnet in upper strata and n+1 the tabular permanent magnet of lower floor is SN-SS-NS-NN correspondence rule.Under SN-SS-NS-NN correspondence rule, n the tabular permanent magnet in upper strata and n+1 the tabular permanent magnet of lower floor produce primary magnetic field jointly, and the primary magnetic field magnetic line of force distributes as shown in Figure 3.Specific works process is as follows: sheet metal and lamellar permanent magnet move and cut the primary magnetic field magnetic line of force in air gap, makes to form eddy current in sheet metal, makes thus to produce on sheet metal damping force.Based on said process, compared with conventional planar electromagnetic damper, planar unsymmetrical electromagnetic damper tool described in the utility model has the following advantages: one, the upper and lower dissymmetrical structure of elementary employing of planar unsymmetrical electromagnetic damper described in the utility model, and elementary magnetic pole correspondence rule adopts SN-SS-NS-NN correspondence rule.Under SN-SS-NS-NN correspondence rule, the primary magnetic field magnetic line of force no longer passes equably air gap as the primary magnetic field magnetic line of force of conventional planar electromagnetic damper, but (being SS position and NN position) repels to sheet metal moving direction mutually because pole polarity is identical in same polarity position.Like this, encrypt at the primary magnetic field magnetic line of force of same polarity position, Magnetic flux density is strengthened greatly, when sheet metal moves in air gap, will suffer from the primary magnetic field that variance ratio is higher.Simultaneously, under SN-SS-NS-NN correspondence rule, each tabular permanent magnet (being n the tabular permanent magnet in upper strata and n+1 the tabular permanent magnet of lower floor) has formed the higher magnetic field of dividing a word with a hyphen at the end of a line (alternative frequency in the magnetic field of dividing a word with a hyphen at the end of a line of the each unit of conventional planar electromagnetic damper primary permanent magnet volume array is NS-SN alternation 1 time, and the alternative frequency in this magnetic field of dividing a word with a hyphen at the end of a line is SN-SS-NS-NN alternation 3 times) of alternative frequency in the moving direction of sheet metal.Therefore, distribute and SN-SS-NS-NN correspondence rule by the magnetic pole that adopts upper and lower dissymmetrical structure, the primary magnetic field variance ratio suffering from when sheet metal is moved in air gap significantly increases, make thus the eddy current producing in sheet metal significantly increase, thereby the damping force producing on sheet metal is significantly increased.Its two, the combination of the secondary employing sheet metal of planar unsymmetrical electromagnetic damper described in the utility model and lamellar permanent magnet forms.Lamellar permanent magnet is very thin, and its magnetic compared with each tabular permanent magnet very a little less than.Therefore, the Main Function of lamellar permanent magnet in movement process is the active collection primary magnetic field magnetic line of force, improves thus and is positioned at the primary magnetic field variance ratio that the sheet metal at lamellar permanent magnet rear suffers from.By setting up lamellar permanent magnet, the primary magnetic field magnetic line of force is assembled fast at the front end of sheet metal, the primary magnetic field variance ratio that makes thus sheet metal suffer from is not only relevant with the position of sheet metal motion itself, thereby the primary magnetic field variance ratio suffering from when sheet metal is moved in air gap accelerates to increase, and then the eddy current producing in sheet metal is further increased, finally make the damping force producing on sheet metal further increase.Test shows, the damping force that planar unsymmetrical electromagnetic damper described in the utility model produces is the more than 5 times of damping force that traditional electromagnetic damper produces.In sum, planar unsymmetrical electromagnetic damper described in the utility model, by adopting brand new, efficiently solves the less problem of conventional planar electromagnetic damper damping force.
The utility model is rational in infrastructure, it is ingenious to design, and efficiently solves the less problem of conventional planar electromagnetic damper damping force, is applicable to the fields such as space flight, aviation, military project, firearms, automobile, electric power and building.
Brief description of the drawings
Fig. 1 is the primary magnetic field magnetic line of force distribution schematic diagram of conventional planar electromagnetic damper.
Fig. 2 is structural representation of the present utility model.
Fig. 3 is primary magnetic field magnetic line of force distribution schematic diagram of the present utility model.
In figure: 1-upper strata yoke plate, 2-lower floor yoke plate, the tabular permanent magnet in 3-upper strata, the tabular permanent magnet of 4-lower floor, 5-sheet metal, the lamellar permanent magnet of 6-, 7-air gap.
Embodiment
Planar unsymmetrical electromagnetic damper, comprises primary and secondary;
Described elementary upper strata yoke plate 1, lower floor's yoke plate 2, the tabular permanent magnet 3 in a n upper strata, the tabular permanent magnet 4 of a n+1 lower floor of comprising; Described secondary sheet metal 5, the lamellar permanent magnet 6 of comprising;
Wherein, lower floor's yoke plate 2 is parallel to each other with upper strata yoke plate 1, and the lower face of the upper plate surface of lower floor's yoke plate 2 and upper strata yoke plate 1 is facing each other;
The upper plate surface of the tabular permanent magnet 3 in upper strata and lower face opposite polarity magnetic pole strength each other;
The upper plate surface of the tabular permanent magnet 4 of lower floor and lower face opposite polarity magnetic pole strength each other;
The upper plate surface of n the tabular permanent magnet 3 in upper strata is all fixed with the lower face of upper strata yoke plate 1, and n the tabular permanent magnet 3 in upper strata is by next-door neighbour's arrangement successively after forward direction; The upper plate surface of adjacent two tabular permanent magnets 3 in upper strata opposite polarity magnetic pole strength each other;
The lower face of n+1 the tabular permanent magnet 4 of lower floor is all fixed with the upper plate surface of lower floor yoke plate 2, and n+1 tabular permanent magnet 4 of lower floor by after forward direction successively next-door neighbour arrange; The lower face opposite polarity magnetic pole strength each other of the tabular permanent magnet 4 of adjacent Liang Ge lower floor;
The lower face first half of i the tabular permanent magnet 3 in upper strata and the upper plate surface of i the tabular permanent magnet 4 of lower floor are latter half of just right, and the upper plate surface opposite polarity magnetic pole strength each other of the lower face of i the tabular permanent magnet 3 in upper strata and i the tabular permanent magnet 4 of lower floor;
The lower face of i the tabular permanent magnet 3 in upper strata is latter half of just right with upper plate surface first half i+1 the tabular permanent magnet 4 of lower floor, and the lower face of i the tabular permanent magnet 3 in upper strata is the magnetic pole strength that polarity is identical with the upper plate surface of i+1 the tabular permanent magnet 4 of lower floor;
The lower face of n the tabular permanent magnet 3 in upper strata all flushes, and the common formation of the lower face of n the tabular permanent magnet 3 in upper strata the first plane;
The upper plate surface of n+1 the tabular permanent magnet 4 of lower floor all flushes, and the common formation of the upper plate surface of n+1 the tabular permanent magnet 4 of lower floor the second plane;
Between the second plane and the first plane, be provided with air gap 7;
Sheet metal 5 is parallel to each other with upper strata yoke plate 1, and sheet metal 5 is arranged in air gap 7 movably;
The rear plate face of lamellar permanent magnet 6 and the front-end face of sheet metal 5 are fixed;
N is positive integer; I is positive integer, and 1≤i≤n.
When concrete enforcement, the numerical value of n is 2.The thickness up and down of the thickness up and down of the 1st the tabular permanent magnet in upper strata, the thickness up and down of the 2nd the tabular permanent magnet in upper strata, the thickness up and down of the 1st the tabular permanent magnet of lower floor, the thickness up and down of the 2nd the tabular permanent magnet of lower floor, the 3rd the tabular permanent magnet of lower floor is all consistent.The left and right width of the left and right width of the 1st the tabular permanent magnet in upper strata, the left and right width of the 2nd the tabular permanent magnet in upper strata, the left and right width of the 1st the tabular permanent magnet of lower floor, the left and right width of the 2nd the tabular permanent magnet of lower floor, the 3rd the tabular permanent magnet of lower floor is all consistent.The front and back length of the front and back length of the 1st the tabular permanent magnet in upper strata, the front and back length of the 2nd the tabular permanent magnet in upper strata, the 2nd the tabular permanent magnet of lower floor is all consistent.The front and back length of the 1st the tabular permanent magnet of lower floor, the front and back length of the 3rd the tabular permanent magnet of lower floor be the 2nd the tabular permanent magnet of lower floor front and back length 1/2.Sheet metal adopts high conductivity metal plate.
Claims (1)
1. a planar unsymmetrical electromagnetic damper, is characterized in that: comprise primary and secondary;
Described elementary upper strata yoke plate (1), lower floor's yoke plate (2), the tabular permanent magnet in a n upper strata (3), the tabular permanent magnet of a n+1 lower floor (4) of comprising; Described secondary sheet metal (5), the lamellar permanent magnet (6) of comprising;
Wherein, lower floor's yoke plate (2) is parallel to each other with upper strata yoke plate (1), and the lower face of the upper plate surface of lower floor's yoke plate (2) and upper strata yoke plate (1) is facing each other;
The upper plate surface of the tabular permanent magnet in upper strata (3) and lower face opposite polarity magnetic pole strength each other;
The upper plate surface of the tabular permanent magnet of lower floor (4) and lower face opposite polarity magnetic pole strength each other;
The upper plate surface of n the tabular permanent magnet in upper strata (3) is all fixed with the lower face of upper strata yoke plate (1), and n the tabular permanent magnet in upper strata (3) is by next-door neighbour's arrangement successively after forward direction; The upper plate surface of adjacent two tabular permanent magnets in upper strata (3) opposite polarity magnetic pole strength each other;
The lower face of n+1 the tabular permanent magnet of lower floor (4) is all fixed with the upper plate surface of lower floor's yoke plate (2), and n+1 the tabular permanent magnet of lower floor (4) is by next-door neighbour's arrangement successively after forward direction; The lower face of the tabular permanent magnet of adjacent Liang Ge lower floor (4) opposite polarity magnetic pole strength each other;
The lower face first half of i the tabular permanent magnet in upper strata (3) and the upper plate surface of i the tabular permanent magnet of lower floor (4) are latter half of just right, and the upper plate surface opposite polarity magnetic pole strength each other of the lower face of i the tabular permanent magnet in upper strata (3) and i the tabular permanent magnet of lower floor (4);
The lower face of i the tabular permanent magnet in upper strata (3) is latter half of just right with upper plate surface first half i+1 the tabular permanent magnet of lower floor (4), and the lower face of i the tabular permanent magnet in upper strata (3) is the magnetic pole strength that polarity is identical with the upper plate surface of i+1 the tabular permanent magnet of lower floor (4);
The lower face of n the tabular permanent magnet in upper strata (3) all flushes, and the common formation of the lower face of n the tabular permanent magnet in upper strata (3) the first plane;
The upper plate surface of n+1 the tabular permanent magnet of lower floor (4) all flushes, and the common formation of the upper plate surface of n+1 the tabular permanent magnet of lower floor (4) the second plane;
Between the second plane and the first plane, be provided with air gap (7);
Sheet metal (5) is parallel to each other with upper strata yoke plate (1), and sheet metal (5) is arranged in air gap (7) movably;
The rear plate face of lamellar permanent magnet (6) and the front-end face of sheet metal (5) are fixed;
N is positive integer; I is positive integer, and 1≤i≤n.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420417755.7U CN204004126U (en) | 2014-07-28 | 2014-07-28 | Planar unsymmetrical electromagnetic damper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420417755.7U CN204004126U (en) | 2014-07-28 | 2014-07-28 | Planar unsymmetrical electromagnetic damper |
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| CN204004126U true CN204004126U (en) | 2014-12-10 |
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| CN201420417755.7U Withdrawn - After Issue CN204004126U (en) | 2014-07-28 | 2014-07-28 | Planar unsymmetrical electromagnetic damper |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104132086A (en) * | 2014-07-28 | 2014-11-05 | 山西大学 | Electromagnetic damping device with asymmetric planes |
-
2014
- 2014-07-28 CN CN201420417755.7U patent/CN204004126U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104132086A (en) * | 2014-07-28 | 2014-11-05 | 山西大学 | Electromagnetic damping device with asymmetric planes |
| CN104132086B (en) * | 2014-07-28 | 2015-12-30 | 山西大学 | Planar unsymmetrical electromagnetic damper |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141210 Effective date of abandoning: 20151230 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |