RU2014111273A

RU2014111273A - VIBRATING SYSTEM FOR TECHNOLOGICAL EQUIPMENT WITH VARIABLE WEIGHT

Info

Publication number: RU2014111273A
Application number: RU2014111273/11A
Authority: RU
Inventors: Татьяна Дмитриевна Ходакова; Олег Савельевич Кочетов; Мария Олеговна Стареева; Мария Михайловна Стареева; Анна Михайловна Стареева
Original assignee: Татьяна Дмитриевна Ходакова
Priority date: 2014-03-25
Filing date: 2014-03-25
Publication date: 2015-09-27

Abstract

1. Виброизолирующая система для технологического оборудования с переменной массой, содержащая основание, опорную платформу и расположенный между ними упругий элемент, выполненный в виде цилиндрической равночастотной пружины, имеющей переменный шаг t, обеспечивающий постоянство собственной частоты системы при любых нагрузках Р из заданного диапазона: P≤Р≤Р, за счет своей осадки δ:где Pи Рсоответственно минимальная и максимальная нагрузки, при которых сохраняются условия равночастотности; Р - нагрузка, удовлетворяющая условию P≤P≤Р;δ- заданная начальная осадка пружины, отвечающая минимальной нагрузке P, и условию равночастотности: постоянству частоты собственных колебаний виброизолируемой системы при изменении массы этой системы в заданных пределах, отличающаяся тем, что система содержит, по крайней мере, два пружинных равночастотных виброизолятора с равночастотными пружинами, симметрично установленными относительно опорной платформы, при этом нижний фланец равночастотной пружины каждого виброизолятора закреплен на упругом основании, а верхний - на опорной пластине, а на опорной платформе, посредством крепежных элементов, закреплен виброизолируемый объект с переменной технологической массой, причем платформа с помощью вертикальных и горизонтальных рычагов связана с опорными узлами, закрепленными на опорной пластине каждого виброизолятора с помощью осесимметричных с равночастотными пружинами регулировочных болтов, жестко соединенных со втулками, охватывающими регулировочные болты гайками, а каждый из опорных узлов содержит вибродемпфирующие втулки, коаксиально установленные регулировочны�1. Vibration isolating system for technological equipment with variable weight, containing a base, a support platform and an elastic element located between them, made in the form of a cylindrical equal-frequency spring having a variable pitch t, ensuring the constancy of the natural frequency of the system at any loads P from a given range: P≤ P≤P, due to its precipitation δ: where P and Рrespectively the minimum and maximum loads at which the conditions of equal frequency are maintained; P is a load satisfying the condition P≤P≤P; δ is a given initial spring draft corresponding to the minimum load P, and the condition of equal frequency: constant frequency of natural vibrations of the vibration-insulated system when the mass of this system changes within specified limits, characterized in that the system contains at least two spring equal-frequency vibration isolators with equal-frequency springs symmetrically mounted relative to the support platform, while the lower flange of the equal-frequency spring of each vibration isolator is fixed to on a different base, and the upper one on the base plate, and on the supporting platform, by means of fasteners, a vibration-insulated object with a variable technological mass is fixed, and the platform is connected with the support nodes by means of vertical and horizontal levers fixed to the base plate of each vibration isolator using axisymmetric equal-frequency springs of adjusting bolts rigidly connected to bushings, covering adjusting bolts with nuts, and each of the supporting nodes contains vibration damping volts coaxial adjustment coils

Claims

1. Vibration isolating system for technological equipment with variable mass, containing a base, a support platform and an elastic element located between them, made in the form of a cylindrical equal-frequency spring having a variable pitch t, ensuring the constancy of the natural frequency of the system at any loads P from a given range: P ₁ ≤P≤P ₂ , due to its precipitation δ:

where P ₁ and P ₂ respectively the minimum and maximum loads under which the conditions of equal frequency are maintained; P is a load satisfying the condition P ₁ ≤P≤P ₂ ;

δ ₁ - a given initial spring draft, corresponding to the minimum load P ₁ , and the condition of equal frequency: a constant frequency of natural vibrations of the vibration-insulated system when the mass of this system changes within specified limits, characterized in that the system contains at least two spring-frequency vibration isolators with equal frequency springs symmetrically mounted relative to the support platform, while the lower flange of the equal-frequency spring of each vibration isolator is mounted on an elastic base, and the upper on the support the plate, and on the supporting platform, by means of fasteners, a vibration-insulated object with a variable technological mass is fixed, and the platform is connected with supporting nodes fixed to the supporting plate of each vibration isolator using vertical and horizontal levers with the help of axisymmetric adjustment bolts rigidly connected to bushings, covering the adjustment bolts with nuts, and each of the support nodes contains vibration damping bushings, coaxially mounted bolts, while the lower flange of the equal-frequency spring of each vibration isolator is mounted on an elastic base, which is connected to the lower platform of the vibration isolator by at least three struts with screws and with elastic coaxially located outside the struts, and under the elastic base of the lower flange of the equal-frequency springs, axisymmetrically to it, placed a cylindrical cone damper, for example from an elastomer, mounted with its cylindrical part on the lower platform of each vibration isolator, and the conical part associated with elastic base equifrequent spring.

2. Vibration isolating system for technological equipment with variable weight according to claim 1, characterized in that the cylindrical cone damper is made in the form of series-connected conical and cylindrical coil springs, the turns of which are covered with a layer of elastomer, for example polyurethane.