DE6604827U - MAGNETIC VIBRATOR - Google Patents

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This 1Sxa £ äxuSxSsg concerns electromagnetically driven by springs scrappy ge & Zweimas3enschwingsysteme ₇ Magaetvibratoren as stun drive out of his mind for three OER of-taig τοη bulk materials are used, and has * sum _counter?; the formation of the d & s B / =! teins stood for very large ring widths, as they inevitably occur, for example, at lower frequencies than the usual frequency of 50 Hz, for example at 25 Ez.

The well-known Hormalauaführung of magnetic vibrators are either using coil springs or leaf springs generally made of steel airs. Both types of feathers have a linear spring characteristic.

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If one were to use a notmrilea screw-Pedersystem with linear characteristics for large vibration amplitudes and low frequencies, the difference in tensile force with large and small air gaps would be eminently large due to the large air gap, i.e. the amplitude would be very small and through the very large sisiiaales air gap ο ^ ₁ would also assume the air gap penetration very high values, aο that the application would be very uneconomical.

The other type of magnetic vibrator uses steel leaf springs. The deflection of a leaf spring is the same as that of a helical spring if the permissible stresses are adhered to very low. There are therefore leaf spring servo-brators built that have a large number of leaf springs and the sir.e relatively large length of the bay, i.e. a large distance between the external JPedereinspamiungen show »to the required

^: equal oscillation amplitude can be determined even at normal frequency

are sufficient

i t the deflection ^ er! springs within small limits ucd swar can be kept within the zuxäasiger limits, on the other hand, such a mass ratio is also used in such vibrators used, the relatively low overall amplitudes at a allowed to carry out sufficient hat amplitude »

In. SIg, 5 are sehematically two masses coupled by leather are recorded, each the known physical

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Laws, the vibration magnitudes behave in inverse proportion to the size of the masses and the total vibration range is then the sum of the two individual vibration amplitudes. If the mass Gp is now selected to be large compared to G., the required oscillation amplitude S. of the protective mass G-. can be realized by means of a relatively small total amplitude Sj ₁ + S ^ »

The Haehtei! this arrangement is the relatively heavy free side Gn, _t the mass of which is about three to four times as large as

However, a short design with leaf springs is also known, with a softer and a relatively low weight Free mass G-, a large amplitude is achieved in that the leaf spring assembly is clamped in a torsionally flexible manner using a so-called oscillating saddle. Such arrangements that probably allow large amplitudes, but require a relatively large spring volume, since only a fraction of the actual Spring constant can be effectively used as a result of the torsionally elastic restraint.

In Sehraubenfederc achieving a progressive spring characteristic would theoretically by applying spring coils possible, but this embodiment fails to _see that it is not technically possible for this high oscillation frequency se the springs precisely establish that a noise-free rolling of the spring coils takes place "also compete the waste flat corrosion or, erosions that the

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The stability of the coil spring »limit * for leaf springs the behavioral ellipses are similar.

The characteristic of a vibrator with a linear coil spring is in Pig. 1 recorded »

= By the quadratic increasing tensile force and also by the

• Disproportionately increasing scatter ratios with different air gaps increases the amplitude from the Henn operating point, point \ by increasing the supply voltage, for example by 10 # to the value TJ. from S _1x to S., i.e. from A 5 A

«I point 1 to 2 · The values that occur in practice lie

between 40 - 100 $> visual swing width assessment at 10 i> voltage

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change- In point U. the mechanical attachment of

Γ Magnet and anchor instead.

Ia Pig * 2 the air gap ratios at rest and during operation are recorded. The rest air gap between the magnet and the armature, with these elements being arranged on one of the two seats of a two-cushion oscillator, is ο _a Bei Hennbetrieb has _{the oscillation range designated by Sj 5} and S ^ and the minimally effective air gap during the oscillation movement X3t ^ ₀₁₁₁₁ · cf ^^ now determines the current consumption as a result of the required air gap flow. The current consumption is certainly also dependent on the phase position of the oscillation of the Krtoftamplitude. However, the different relationships relate to the same phase position,

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^ tarr clamped leaf springs are now subject to a load that results from the sum of the BiecebeanspruchuBg and T3r tensile load due to the extension at ^Λ

Such an arrangement is shown schematically in FIG. The distances 2a, i.e. from the external restraint aa, are rigid, If there is a deflection at the middle restraint, i.e. at point 2, spring stress occurs not only through the ! Deflection as such, but also due to the elongation the spring, which inevitably has to be done, since the distance a is rigid and cannot give way.

In Fig. 4 the stress c of the leaf spring is recorded as the resultant of the linearly increasing bending stress d ^ and the proportionally increasing tensile stress (j _z . The resultant iot e The resulting spring constant now has a disproportionately increasing characteristic As it is used today, almost without exception, the Ε-mod ι 2, C kp / om, the ^ jls ^ sigen waiting ji Ct, bere.te darn

reached, if f>, still much smaller sli &" iet, the tensile force component and thus the progression is not effective with a steel leaf spring. By then, they would be made extremely thin, which is, however, practically and economically not possible.

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The situation is different when using a plastic leaf spring (GFX spring). whose E-Mbd-il is approx. 0.3 * 10 ⁶ kp / cm ² ', eggs are safe and with the same installation length ^ ie s »E, bsi the steel spring -" significantly larger deflections without exceeding the permissible stress these deflections reach values _t at which the tensile stress E is slightly less than the bending stress, but on the contrary outweighs äeT bending stress »

line progressive Pedercharäkterietik in an electromagnetic powered by springs coupled two-axle swing system for large oscillation ranges, especially for low ones

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Frequency, gaaftggiafggg is achieved by using plastic leaf springs Clamped in a rigid, tensile bearing

are and that the spring force used mainly by the Traction? ·; Aponente determined let »

A leaf spring of this type, rigidly locked in, thus has a profound peder characteristic due to the superimposition of the tension parinization with the tensile stress. Liese prcgrassiyc feathering. v ^ ak-terietik bai major Dur.iibiegujigen, the example ^; a little € for one. ? * Kz Tibriisor required tind ^ allow a vibratory drive to be implemented, the apparent power consumption of which is very low, because from the Benn operating point to the stop operation the amplitude only increases by a small value »that is, according to lig. 7 by approx. 10 - 20 $ - This is an operation with a small minimum air gap and

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thus a low apparent power consumption is possible »different In other words, if the amplitude is increased by increasing the supply voltage, there is an increase in the resonance distance before, so that the stop at a much higher. Dining room ÖKf © Ag * *

If the voltage difference between Henn operation and announcement

operation is held at 10? s, so it results in contrast to that

with a characteristic according to FIG. 1 Change of the frequency range between nominal operation and stop operation from 10 - 20 # of the Henn value,

In Fig. 6 is an example of the structural design recorded of such a transducer. The essential thing is that the vibrator travel side, in which in this case the Magnet system is cast in, extremely stiff is so that that occurs when the leaf spring deflects Longitudinal forces do not deform the housing, but rather as Tension and elongation of the springs have an effect. The encapsulation of the magnet system in the housing with synthetic resin is essential contributes to this rigidity.

An advantageous arrangement is obtained when the leaf springs are divided into two superimposed packages, where the inner leaf spring assembly 14 is advantageously equipped with a larger number of springs than the outer 15, which then adopts the progressively higher values. The division of the feathers into

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two packets increase the three-natural frequency of the ¥ ibracors around t \ a longitudinal axis

The assembly of the leaf springs outside and inside on the ax-bsitsseite 8 is usually carried out by long stretching, screwing, the one strong bond despite many Ensure separation gap even over longer operating times.

It is conceivable that the outer Hötze 10 and '1 and dip associated outer chipboard adjustable to rearrange, among other things to still have a certain abstinence »

By additionally attached stops in the part of the steering, an increased processivity can be achieved.

8 pages Bescl -eiburg claims for protection

2 sheets of drawing with

iigures

4827

Claims (7)

L i e e n ^ ia Patent - Yerwaltrngs - ir, m, öc.H, 6 Frankfurt (Main). '-heodor-rStern-Eai 1 Egf.Sr. I 26/272 Frankfurt, the. May 28, 1968 claims for protection 1. Electromagnetically driven coupled by springs Two-seater swing system for large widths, in particular for low frequency, characterized in that plastic leaf springs are clamped in rigid, high tensile strength bearings and that the spring force used is mainly determined by the tensile force component » 2 »Two-mass oscillation system according to claim 1, characterized in that that the plastic leaf springs in two or several stacked and mutually spaced packages are combined, 3 »Two-mass oscillation system according to claim 2, characterized in that that a package with a large feather aB / iahl right on the vibrator free side and a package with one lower look! arranged at a distance from the first package £ are » Erf «ffr« L 26/272 4 · ZwetaiaaeenseSswiagsyetam after one de? Claims 1 to 3 » dadureh g® & © aaz © tehnöt that the Tedern by expansion screw ^ are clamped ο 5 «ZweimassensühwiBgayetea according to one of claims 1 to 4, characterized in that the hut mounting of the springs, the anchor and the associated housing part are braced by expansion screws _B 6. Zweimaesenachwingsystem according to one of claims 1 to 5, characterized in that the spamming of the springs between adjustable land sliding blocks and clamping plates he follows. 7. two-mass oscillation system according to one of claims 1 to 6, characterized in that stops are arranged that additionally intensify the progressiveness., 8 · two-mass oscillation system according to one of claims 1 to 7, characterized in that the magnet system so in one The hollow body is cast with synthetic resin on the free side, so that a rigid * ind stiff structure is created,