SU1479137A1

SU1479137A1 - Electrodynamic vibration exiter

Info

Publication number: SU1479137A1
Application number: SU864080859A
Authority: SU
Inventors: Виктор Петрович Григорьев; Александр Николаевич Котов; Дмитрий Борисович Лисенков; Александр Михайлович Носов; Олег Николаевич Полещиков; Галина Ивановна Евдокимова
Original assignee: Предприятие П/Я В-2725
Priority date: 1986-07-02
Filing date: 1986-07-02
Publication date: 1989-05-15

Abstract

Изобретение относитс к вибрационной технике и обеспечивает повышение точности воспроизведени гармонической формы колебаний подвижной катушки электродинамического вибровозбудител за счет уменьшени нелинейности подвески. Упруга подвеска подвижной катушки 2 включает две пары верхних струн 7, 8, две пары нижних струн 9, 10 и индивидуальные механизмы 11 нат жени , с которыми соединены концы струн. Средней частью струны прикреплены к катушке. Рассто ние между местами креплени струн к катушке превышает рассто ние между местами креплени струн к механизмам нат жени более, чем на максимальный дл данного вибровозбудител размах колебаний. Благодар этому обща жесткость подвески измен етс при колебани х незначительно. Соединение концов каждой струны с механизмами нат жени через упругие элементы дает возможность повышени амплитуды колебаний за счет увеличени продольной податливости подвески. Конструкци узла 17 креплени , включающего две подушки с выпуклыми цилиндрическими поверхност ми контакта со струной и вставленный между подушками штифт, охватываемый петлей, образованной в средней части струны, обеспечивает уменьшение напр жений в струне вблизи заделки, за счет чего повышаетс долговечность. 2 з.п. ф-лы, 3 ил.The invention relates to a vibration technique and provides an increase in the accuracy of reproducing the harmonic waveform of a moving coil of an electrodynamic vibration exciter by reducing the non-linearity of the suspension. The elastic suspension of the moving coil 2 includes two pairs of upper strings 7, 8, two pairs of lower strings 9, 10, and individual tension mechanisms 11 with which the ends of the strings are connected. The middle part of the string attached to the coil. The distance between the places of attachment of the strings to the coil exceeds the distance between the places of the attachment of the strings to the tensioning mechanisms by more than the maximum range of vibrations. Due to this, the total stiffness of the suspension varies slightly with fluctuations. The connection of the ends of each string with the tension mechanisms through elastic elements makes it possible to increase the amplitude of oscillations by increasing the longitudinal flexibility of the suspension. The design of the attachment assembly 17 comprising two pillows with convex cylindrical contact surfaces with a string and a pin inserted between the pillows, covered by a loop formed in the middle of the string, reduces stress in the string near the embedment, thereby increasing durability. 2 hp f-ly, 3 ill.

Description

Фиг. 2FIG. 2

7373

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W 12 15 МW 12 15 M

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Claims

Claim

1. An electrodynamic vibration exciter containing a magnetic circuit, a rigidly connected table and a movable coil located in the working gap of the magnetic circuit, and an elastic suspension, including spaced apart along the length of the moving coil of the string, the nodes of the strings to the coil and mounted on the magnetic circuit string tensioning mechanisms, characterized in that, in order to increase the accuracy of reproducing the harmonic form of vibrations by reducing the nonlinearity of the suspension, the distance along the axis of oscillation between the points of attachment of the strings to the cat shke exceeds the distance between the attachment locations to the string tensioning mechanisms more than the maximum for a given amplitude of oscillations exciter.

2. Vibration exciter according to π. 1, characterized in that, in order to increase durability, the strings are arranged in pairs in planes tangent to the side surface of the coil, each attachment point of the string to the coil is made in the form of two pillows that are installed symmetrically with respect to the diametrical plane of the coil and have convex cylindrical surfaces contact with the string, perpendicular to the plane of the arrangement of the pair of strings and the pin inserted between the pillows, the string has a rectangular cross section, and a loop covering the pin is formed in its middle part.

3. Vibration exciter according to ηπ. 1 and 2, characterized in that, in order to increase the amplitude of the oscillations, the ends of each string are connected to the tension mechanisms through elastic elements.

14 12 15 14

Fie. 3