SU941725A1

SU941725A1 - Bearing assembly

Info

Publication number: SU941725A1
Application number: SU802951588A
Authority: SU
Inventors: Юозас Юозо Гецевичюс
Original assignee: Каунасский Политехнический Институт Им. Антанаса Снечкуса
Priority date: 1980-07-04
Filing date: 1980-07-04
Publication date: 1982-07-07

Description

(54) ПОДШИПНИКОВЫЙ УЗЕЛ(54) BEARING KNOT

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Изобретение относитс к машиностроению и может быть использовано дл подвеса прецизионных роторных узлов.The invention relates to mechanical engineering and can be used to suspend precision rotor assemblies.

Известен подшипниковый узел, содержаш ,ий смонтированные в корпусе и на валу подшипники качени , имеюшие кольца, тела качени и сепараторы 1.A bearing unit is known to contain rolling bearings with rings, rolling bodies and cages 1 mounted in the housing and on the shaft.

Недостатком известного подшипникового узла вл етс то, что из-за изменени режимов работы возникают значительные колебани вала. По причине неровности геометрии поверхностей качени внутреннего и внешнего кольца, шарикоподшипников услови качени дл шариков вл ютс разными как в одним подшипнике, так и в обоих, установленных на противоположных концах вала. При этом скорости сепараторов этих подшипников вл ютс разными . Продолжительна работа подшипников и переходные процессы в опоре способствуют более быстрому ухудшению геометрических параметров составных частей подшипников, а значит, п неодинаковости скоростей вращени тел качени с сепараторами и неравномерности их окружного перемещени . Указанна несинхронность вращени тел качени с сепараторами обоихA disadvantage of the known bearing assembly is that, due to a change in operating modes, significant shaft oscillations occur. Due to the unevenness of the geometry of the rolling surfaces of the inner and outer ring, the ball bearings, the rolling conditions for the balls are different both in one bearing and in both, mounted on opposite ends of the shaft. In this case, the speeds of the cages of these bearings are different. The long-term operation of bearings and transients in the bearing contribute to a more rapid deterioration of the geometrical parameters of the component parts of the bearings, and therefore the differences in the speeds of rotation of rolling bodies with cages and irregularity of their circumferential movement. This non-synchronous rotation of the rolling elements with the separators of both

подшипников способствует возникновению еще более значительных колебаний вала, а к тому же, и дальнейшему ухудшению самих подшипников.bearings contributes to the emergence of more significant oscillations of the shaft, and besides, and further deterioration of the bearings themselves.

Цель изобретени - уменьшение колебаний вала.The purpose of the invention is to reduce shaft oscillations.

Поставленна цель достигаетс тем, что подшипниковый узел, содержащий смонтированные в корпусе и на валу подщипники качени , имеюшие кольца, тела качени и сепараторы, снабжен синхронизатором вращени сепараторов и приспособлением фазировани , при этом синхронизатор выполнен в виде статорных обмоток и установленных с зазором относительно них кольцевых роторных пластин, жестко св занных с сепараторами и выполненных из магнитного материала, а приспособление фазировани выполнено в виде датчика колебаний вала, соединенного с ним 20 электрически преобразовател и исполнительного органа, кинематически св занного одной из статорных обмоток синхронизатора .The goal is achieved by the fact that the bearing assembly containing rolling bearings, having rings, rolling bodies and separators mounted in the housing and on the shaft, is equipped with a synchronizer of rotation of the separators and a phasing device, the synchronizer being made in the form of stator windings and installed with a gap relative to them rotor plates rigidly connected to the separators and made of magnetic material, and the phasing device made in the form of a shaft oscillation sensor connected to it 20 o Electrically converter and actuator, kinematically connected to one of the stator windings of the synchronizer.

Claims

The drawing shows the substructure, longitudinal section. The bearing assembly contains two bearings 1 with rolling bodies 2 and separators 3, the inner rings 4 of which are fixed to the precision shaft 5, and the outer 6 are mounted in the housing 7. Axially the shaft 5 in the housing 7 is mounted in the form of two electromagnetic mechanisms, respectively, having stator parts 8 and 9 with synchronizing windings 10 and 11, facing the sub-carriers 1, and rotary, made in the form of rings 12 and 13, made of magnetic material and attached by means of a finger 14 to separators 3. The stator parts 8 and 9 of the synchronizers of rotation are mounted in the housing 7 with the possibility of their rotation, and one of them, for example, the stator part 8, is connected by transferring 15 and the rotary actuator 16 of the conversion channel 17 to the shaft oscillation sensor 18 5. Bearing unit operates as follows. With the start of rotation of the shaft 5, mounted in bearings 1, a synchronizing control signal of a certain frequency is fed to the windings 10 and 11 of the stator parts 8 and 9 of the electromagnetic mechanisms (power is not shown). Since the stator parts 8 and 9 are made in the form of stators of synchronous hysteresis motors, a rotating magnetic field is created in them. The rotating magnetic fields of the stator parts 8 and 9 interact with the magnetic rings 12 and 13 located in front of them, attached to the separators 3. Therefore, the separators 3, and, therefore, the rolling bodies of the 2-both bearings perform a rotary synchronous movement with a frequency proportional to This, in turn, is selected depending on the nominal speed of the shaft 5. Ensuring synchronism of rotation of the separators avoids the operating conditions of the shaft assembly 5, for example, distortions, favorable occurrence of the parasitic vibroexcitation and, hence, reduce the amplitude of the oscillations. Simultaneously with the synchronization of the rotation of the separators, their phase matching is also adjusted. For this purpose, the signal of the amplitude sensor 18 of the radial oscillations of the shaft 5 is processed in the converter channel 17 and, when installed, is supplied to the actuating rotary body 16, which by means of the transmission 15 performs the necessary rotation of one part (in this case, the stator part 8) relative to the stator part 9 In this case, the phasing rotation of the separator 12 with rolling elements relative to the separator 13 is carried out, providing an additional reduction of the radial oscillations of the shaft 5. Introduction of a synchronizing electromagnet to the support itnogo mechanism allows to carry out synchronization with the rotation of the separators rolling bodies, and the bodies of rotation dopolnitelnyyu separators rolling relative to each other (opposite bearing) allows the implement and their rotation in phase according to the lowest amplitude of radial vibrations of the shaft. Claims of the Invention A bearing assembly comprising rolling bearings, having rings, rolling bodies and separators mounted in the housing and on the shaft, characterized in that, in order to reduce shaft oscillations. it is equipped with a synchronizer of rotation of the separators and a phasing device; the synchronizer is made in the form of stator windings and annular rotor plates installed with a gap relative to them, rigidly connected to the separators and made of magnetic material, and the device for phasing is made in the form of a shaft oscillation sensor connected with it an electrically converter and an actuator, kinematically connected with one of the stator windings of the synchronizer, Sources of information taken into account understanding during examination 1. Kovalev MP and others. Instrument supports. M., “Mechanical Engineering, 1967, p. 170-172, fig. 90.6 (prototype).

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