SU944677A1

SU944677A1 - Vibration exciter

Info

Publication number: SU944677A1
Application number: SU792796956A
Authority: SU
Inventors: Михаил Захарович Скок; Владимир Иосифович Адашкевич; Эпполит Антонович Щербаков; Марат Павлович Бирюков; Петр Николаевич Бондарчук
Original assignee: Институт проблем надежности и долговечности машин АН БССР; Центральное конструкторское бюро с опытным производством АН БССР
Priority date: 1979-07-16
Filing date: 1979-07-16
Publication date: 1982-07-23

Description

(54) ВИБРОВОЗБУДИТЕЛЬ(54) VIBRATOR

1one

Изобретение относитс к вибрационной технике и может быть использовано в машинах и устройствах различного назначени , в частности в испытательных стендах.The invention relates to vibration technology and can be used in machines and devices for various purposes, in particular in test benches.

Известен вибровозбудитель, содержащий корпус, установленный в нем п-риводной вал с дебалансами, один из которых жестко соединен с приводным валом, другой, обхватывающий его, установлен с возможностью поворота вокруг оси вала, и механизм регулировани положени поворотного дебаланса, выполненный в виде пальцев, соединенных с дебалансом с помощью втулок с косым пазом, и регулировочного приспособлени , снабженного передвижным ограничителем угла поворота дебаланса 1.A vibration exciter is known, comprising a housing, an anti-balance shaft mounted therein with unbalances, one of which is rigidly connected to the drive shaft, the other spanning it is rotatably mounted around the axis of the shaft, and a finger-shaped adjustment mechanism for the rotational unbalance, connected to unbalance with sleeves with an oblique groove, and an adjusting device equipped with a movable unbalance angle of rotation 1.

Недостатками известного вибровозбудител вл ютс сложность его конструкции и невысокие технологические возможности , так как возможны только два положени поворотного дебаланса.The disadvantages of the known vibration exciter are the complexity of its design and low technological capabilities, since only two positions of the rotary unbalance are possible.

Целью изобретени вл етс упрощение конструкции при расщирении технологических возможностей.The aim of the invention is to simplify the design while expanding the technological possibilities.

Поставленна цель достигаетс тем, что в вибровозбудителе, содержащем корпус.The goal is achieved by the fact that in an exciter comprising a housing.

установленный в нем приводной вал с дебалансами , один из которых жестко соединен с приводным валом, другой, обхватывающий его, установлен с возможностью поворота вокруг оси вала, и механизм регулировани положени поворотного дебаланса , последний выполнен в виде св зываемого с автоматической системой управлени тормозного устройства, поводок которого соединен гибким валом с поворотным дебалан10 сом, и фиксирующих элементов в виде упругой втулки и щариковых опор, установленных между дебалансами.the drive shaft mounted therein with unbalances, one of which is rigidly connected to the drive shaft, the other spanning it, is mounted rotatably around the shaft axis, and the mechanism for adjusting the position of the rotational unbalance, the latter is designed as an automatic control system of the braking device, the leash of which is connected by a flexible shaft with a rotary unbalance 10 som, and fixing elements in the form of an elastic sleeve and ball bearings installed between the unbalances.

На чертеже представлен вибровозбудитель , продольный разрез.The drawing shows the vibration exciter, a longitudinal section.

Вибровозбудитель содержит ррпус I,The exciter contains rrpus I,

приводной вал 2, дебаланс 3, жестко соединенный с валом, и обхватывающий его дебаланс 4, а также механизм регулировани положени дебаланса 4. Механизм регулировани выполнен в виде св зываемого с drive shaft 2, unbalance 3, rigidly connected to the shaft, and embracing it unbalance 4, as well as the mechanism for adjusting the position of the unbalance 4. The adjustment mechanism is made in the form of

Claims

20 by an automatic brake control system 5, which can be made in the form of an electromagnetic clutch 6 with a leash 7 associated with a pivot unbalance 4 by means of a flexible shaft 8 and a cover 9. Both unbalance can be made in the form of eccentrics. Between unbalances 3 and 4, an elastic bushing 10 is installed to fix the mutual position of unbalances 3 and 4, which plays the role of a damping element for damping dynamic loads, and ball bearings 11, which contribute to fixing the rotational unbalance in the axial direction. The mode of operation of the braking device and, consequently, of the entire vibration exciter is set by the automatic control system 5 containing the sensor 12, the unbalance movement measured, the driver position 13 of the driver 7 of the coupling 6, the driver 14, the comparison device 15 and the relay control unit 16. Vibro works as follows. When the drive shaft 2 rotates with it, unbalance 3 and debalance 4 fixed relative to it by sleeve 10 rotate. Depending on the relative position of the eccentric unbalances, oscillations of a certain amplitude will be excited. In order to smoothly change the amplitude of oscillations during operation, the driver 14 adjusts the required magnitude of the oscillation amplitude and activates an automatic control system that transfers the effect to the brake electromagnetic clutch 6 and through the flexible shaft 8 and the cover 9 to unbalance 4, leading it to stop At the same time, under the action of the torque of the drive shaft, the moment of friction between the elastic sleeve 10 and the unbalance 4 is overcome. The balances 3 and 4 are displaced relative to each other by a predetermined amount, and therefore the amplitude of oscillation is set to which the driver 14 is set. unbalance 4 is detected by sensor 12 and converted into an electrical signal, which is fed to comparator 15. When the signals of the sensor 12 and the signal of the driver 14 are equal, a command is generated that enters relay control unit 16, which in turn issues a command to disengage clutch 6. Then unbalance 4, flexible shaft 8 and leash 7 of clutch 6 continue to rotate together with unbalance 3. Such a device. expands the possibilities of regulation, allows operation with any amplitude in a given range. 1 thus, the introduction of an automatically acting braking device together with an elastic fixation element makes it possible to simplify the design of the vibration exciter and at the same time helps to increase its technological capabilities. Claims of the invention A vibration exciter comprising a housing, a drive shaft mounted therein with unbalances, one of which is rigidly connected to the drive shaft, the other enclosing it is rotatably mounted around the shaft axis, and the mechanism for adjusting the position of the rotational unbalance, characterized in that the purpose of simplifying the design when expanding technological capabilities, the mechanism for controlling the position of the rotary unbalance is made in the form of a braking device associated with an automatic control system a, which is connected to the leash flexible shaft with rotary unbalance and fixing elements in the form of elastic sleeves and ball bearings mounted between the unbalance. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 364355, cl. B 06 B 1/16, 1967 (prototype).