SU1083301A1 - Vibration exciter - Google Patents

Abstract

VIBRATOR, containing a stator made of two magnetic cores with multiphase windings laid along the axis, having reverse phase alternation, and elastic-fixed measles with poles installed between the stator magnetic cores, characterized in that, with the aim of expanding functionality by exciting torsional vibrations, three orthogonal axes, the poles of the core are installed in three parallel longitudinal axes of the row, the number of poles in each row is equal to the number of poles of the stator; The circuits of the first row have alternating polarity, the poles of the third row have polarity opposite to that of the poles of the first row, the polarity of the first half of the poles of the middle row is similar to the polarity of the poles of the first row, and the polarity of the second half of the poles of the middle row similar to the polarity of the poles of the last row. (L

Description

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The invention relates to electrical engineering, in particular, to the design of mechanical vibration exciters with a traveling magnetic field, and can be used for vibration testing of various objects for complex vibrations, as well as in vibration technology.

A mechanical vibration exciter is known, which contains an excitation system consisting of two inductors and a measles between inducers on elastic elements, composed of ferromagnetic and diamagnetic links 1.

A disadvantage of the known device is the low energy performance indicators associated with the need to reverse the magnetic field of the inductors.

The closest in technical essence to the present invention is a vibration exciter comprising a stator made of two magnetic circuits with multiphase windings laid along an axis, having a reverse phase alternation and resiliently fixed measles with poles installed between the stator magnetic cores 2.

The disadvantage of the vibration exciter is the impossibility of making rotary torsional vibrations about the three orthogonal axes.

The purpose of the invention is to enhance the functionality by exciting torsional vibrations about three orthogonal axes.

This goal is achieved by the fact that, in an exciter comprising a stator made of two magnetic cores with multiphase windings laid along an axis, having a reverse phase alternation, and elastic fixing with poles installed between the stator cores, the core poles are installed in three parallel longitudinal axes of the axis , the number of poles in each row of the number of poles of the stator, while the poles of the first row have alternating polarity, the poles of the third row have polarity opposite to the polarity of the poles of the first About the row, the polarity of the first half of the poles of the middle row is similar to the polarity of the poles of the first row, and the polarity of the second half of the poles of the middle row is similar to the polarity of the poles of the last, row.

FIG. 1 shows a vibration exciter, a longitudinal section; in fig. 2 - measles vibration exciter, general view.

The device contains flat stationary magnetic cores 1 and 2, in grooves of which similar multiphase, for example three-phase windings 3 and 4 are placed, displaced in the longitudinal direction by pole division and connected with opposite order of phase alternation. Movable measles consists of diamagnetic

a non-conducting body 5 in which the ferromagnetic poles are placed 6.

The poles of 6 cores are set in three parallel longitudinal axes of the row, the number of, lushes in each row is equal to the number of stator voltages, the poles of the first row have alternating polarity, the poles of the third row have polarity opposite to the poles of the first row, the polarity of the first half of the poles of the middle p is similar

0 polarities of the poles of the first row, and the polarity of the second half of the poles of the middle row and the polarity of the poles of the last row.

The body 5 core is fixed relative to the axes X, Y and Z by elastic elements 7.

5 The causative agent of torsional vibrations works as follows.

When windings 3 and 4 are connected to a source of multi-phase, for example three-phase, current with opposite order of phase alternation in air zzbre between the magnetic cores 1 and 2, two running in opposite directions with a speed Vc magnetic fields are formed. Since the windings 3 and 4 are shifted by the magnitude of pole division, the core link twice during the period of change of the supply current is between the poles of the magnetic cores 1 and 2 of different polarity. In this case, the poles of the second row in one half period are attracted to the left part of the lower magnetic conductor 1 and the right part of the upper magnetic conductor 2, pushing away from the right part of the lower magnetic conductor 1 and the left part of the upper pole of the magnetic conductor 2. In the next half period, the poles of the second row are attracted to the right side of the magnetic circuit 1 and the left side of the magnetic circuit 2, pushing off

 from the right side of the magnetic circuit 2 and the left side of the magnetic circuit 1. As a result, the measles makes torsional oscillations about the X axis.

Q Since the direction of the traveling magnetic fields of the magnetic cores 1 and 2 is opposite, in one half period the force directed from left to right acts on the poles of the first row, and the force of the right 5 turns on the poles of the third row, in the next half period - on the poles of the first row there is a force directed from right to left, and at the poles of the third p is a force directed from left to right, with the result that measles makes torsional oscillations about the axis Y.

0 Since the poles of the second row have a polarity symmetrical about the X axis, the tangential forces acting on the measles along the Z axis are compensated for.

The poles of the first row in one half period attract to the magnetic conductor I and repel from the magnetic conductor 2, and the poles of the third row in the same half-life repel from the magnetic conductor 1 and attract to the magnetic conductor 2. In the next half-time, the poles of the first row repel from the magnetic conductor 1 and are attracted to the magnetic circuit 2, and the poles of the third row are attracted to the magnetic circuit 1 and repel from the magnetic circuit 2. As a result, the measles makes torsional oscillations about the Z axis.

Thus, measles makes torsional oscillations about three orthogonal axes X, Y and Z, the frequency of which for each axis is equal to the frequency of the multiphase current supplied to the windings 3 and 4 of the excitation system. Thereby, an increase in the variety of reproducible waveforms is achieved.

(Reg. 2

Claims (1)

A VIBRATOR exciter containing a stator made of two magnetic circuits with multiphase windings laid along the axis, having reverse order of phase rotation, and an elastically fixed armature with poles installed between the stator magnetic circuits, characterized in that, in order to expand functionality due to the excitation of torsional vibrations with respect to three orthogonal axes, the anchor poles are installed in three parallel to the longitudinal axis of the row, the number of poles in each row is equal to the number of stator poles, while Vågå row have alternating polarity poles of the third row have a polarity opposite to the polarity of the first row of poles, the polarity of the first half of the average number of poles of similar polarity of the first row of poles and the polarity of the second half of the average number of similar polarity of the last row of poles poles. ^2/6 ζζζζζλζ / ν zzz 'UU /' UL At '//, Ν' /// U l '/ uuuuuuuuu z In w 1st me In B | a willow SU „„ 1083301 / wUj 77/77777 1 1s —------ of FIG. 1