SU917862A1 - Exciter of mechanical oscillations - Google Patents

Description

(S) MECHANICAL VIBRATION CIRCULATOR

I

The invention relates to vibrotechnics, in particular to the field of excitation of mechanical vibrations by an electromagnetic method, and can be used in vibrotools, as well as in test vibrostands.

Mechanical vibration exciters are known that contain a fixed inductor and a moving inductor with alternating and direct current windings mounted on a fixed 1P inductor. Such an excitation allows for increased reliability, however, the limitation of the amplitude of the oscillations of the core and the decrease in power factor associated with with an increase in equivalent air gap.

The closest in technical essence is a mechanical oscillation pathogen containing inductors of a linear motor and between them measles, recruited from what; axial reduction

ferromagnetic and diamagnetic links attached to elastic elements 121.

A disadvantage of the known device is low efficiency and reliability.

The aim of the invention is to increase efficiency and reliability.

This goal is achieved by the fact that one of the inducers of the exciter is made of a composite, consisting of alternating toothed magnetic conductors and diamagnetic links in the axial direction, with single-phase, connected according to the winding, placed on the magnetic conductors. The number of alternating

15 with the diamagnetic links of the serrated magnetic cores of the composite inductor is equal to the number of pole pairs of the inductor, which is made solid.

Claims (2)

Such an embodiment of the excitation of oscillations allows the oscillating motion of the core to be maintained without reversing the magnetic field, and consequently, to increase efficiency and reliability. 39 The drawing shows a longitudinal section, a mechanical vibration oscillator. The exciter consists of an external case 1, in which by means of a lower case 2, a cover 3 and a sleeve k, an external cylindrical inductor is rigidly fixed, made of axially alternating toothed magnetic cores 5 and 6 and diamagnetic links 7. In the grooves of magnetic cores 5 and 6 are placed single-phase two-pole windings, for example, direct current 8 and 9, connected according to. The number of magnetic cores of the external inductor is equal to the number of poles of the internal inductor 10, which is made objective, for example, laminated, and is rigidly fixed to the internal case 11 with the cover 12. The inductor 10 slots contain a multiphase, for example three-phase, winding 13. The movable measles a hollow cup, assembled from the alternating axial direction of the scientific research institute of ferromagnetic I and diamagnetic nonconductive 15 links. The anchor is fixed in the longitudinal direction by elastic elements 1b and 17, in the transverse direction by contact rings 18. To eliminate the magnetic connection between the external inductor magnetic cores, the axial length of the diamagnetic links 7 is twice the size of the annular gap between the inductors and the core. The exciter is as follows. When the external inductor windings 8 and 9 are connected to a single-phase source, for example, a direct current, and the internal inductor windings 13 to a multiphase source, for example, a three-phase current in the ring, an immobile magnetic field of the windings B and 9 and the traveling magnetic field of the winding 13, and the number of poles of the fixed and traveling magnetic fields are the same. The position of the largest and smallest magnetic conductance of the core corresponds to the case when its ferromagnetic units are respectively between opposite and like poles of the external and internal inductors. If the measles were in the position of the instantaneous conductivity and the inner inductor policy began to move at a synchronous speed, then the measles would also start moving after the runaway pole, striving to occupy the position of the greatest magnetic conductivity. This will occur until the oncoming pole of a similar polarity establishes a new position of the highest magnetic conductivity, which will cause a reverse movement of the core, etc. In this mode of operation of the oscillator, the measles will oscillate at a frequency equal to the frequency of the current supplied to the winding 13. The oscillation exciter design allows the core to oscillate without reversing the magnetic field, which increases efficiency, reliability and, in general, leads to a cheaper initiator , Invention T. The causative agent of mechanical oscillations, containing inductors of a linear motor and measles placed between them, recruited from the axially alternating ferromagnetic and diamagnetic units fixed on elastic elements, characterized in that, in order to increase efficiency and reliability in operation, one of the inductors is made of composite, consisting of alternating in the axial direction toothed magnetic cores and diamagnetic links, and on the magnetic cores there are single-phase windings connected according to . 2. The causative agent of claim 1, wherein the number of alternating with the diamagnetic links of the toothed magnetic cores of the composite inductor is equal to the number of pole pairs of the inductor, made integral. Sources of information taken into account in the examination 1. The author's certificate of the USSR N. cl. H 02 K 33 / Oi, 1972. 2. USSR author's certificate number i 25279, cl. H 02 K 33/12, 1971 (prototype).