SU543786A1

SU543786A1 - Combined support

Info

Publication number: SU543786A1
Application number: SU2094942A
Authority: SU
Inventors: Владимир Сергеевич Смирнов
Original assignee: Предприятие П/Я Г-4805
Priority date: 1975-01-08
Filing date: 1975-01-08
Publication date: 1977-01-25

Description

(54) КОЛ БР1НИРЮВАННАЯ ОПОРА(54) COL BR1NIRUVANNAYA SUPPORT

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Изобретение относитс к. области приборостроени и машиностроени , в частности к устройству комбинированных опор, предназначенных дл подвеса вращающихс узлов и обладающих повышенным сроком службы. The invention relates to the field of instrument-making and mechanical engineering, in particular, to the device of combined supports intended for suspending rotating assemblies and having an increased service life.

Известна комбинированна опора, содержаща вал, опирающийс на гидродинамический подшипник скольжени и разъемный подщипник качени , а также устройство дл перевода опоры с режима качени на гидродинамический режим скольжени , и наоборот Перевод опоры с одного режима на другой осуществл етс при повороте двуплечих рычагов , воздействующих на т гу, установленную в отверстии вала комбинированной опо- ры. На конце т ги закреплен штифт, упирающийс в торец внутренней обоймы разъемноно подшипника качени . При выводе т ги из отверсти вала подшипник качени отключаетс , и опора работает в гидродинамическом режиме скольжени .A known combined support comprising a shaft supported on a hydrodynamic sliding bearing and a detachable rolling bearing, as well as a device for transferring the support from the rolling mode to the hydrodynamic sliding mode, and vice versa. The support is transferred from one mode to the other, acting on the two-arm gu installed in the shaft hole of the combined support. A pin is attached to the end of the rod, which rests against the end of the inner race of the split rolling bearing. When pulling out of the shaft bore, the rolling bearing is disconnected and the bearing operates in hydrodynamic sliding mode.

Известное устройство имеет р д существенных недостатков, ограничивающих его применение в точном приборостроении, а именно: большой аэродинамический момент The known device has a number of significant drawbacks that limit its use in precision instrument making, namely: a large aerodynamic moment

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сопротивлени , создаваемый двуплечими рычагами; большой вес вращающихс частей КЗ-за примен емых двуплечих рычагов; невозможность автоматического перевода эпоры с одного режима работа на другой; неустойчива работа опорь при заклпниванш; гидродинамического подшипника.resistance created by two shoulders; the large weight of the rotating parts of the short circuit due to the used double-arm levers; the inability to automatically transfer an epor from one mode to another; the work of the support is unstable when it is closed; hydrodynamic bearing.

Целью изобретени вл ютс улучшение условий эксплуатации и повышение надежности комбинированной опоры.The aim of the invention is to improve the operating conditions and increase the reliability of the combined support.

Дл этого в известной комбинированной опоре роль подшипника скольжени вьтолн ет радиальноупорный газодинамический подшипник , вал которого укреплен в неразъемных подшипниках качени , а з стройство дл перевода опоры с одного режима работы на другой выполнено в виде неподвижно устаноленного в корпусе электромагнита и диска, жестко укрепленного на валу, а корь электромагнита св зан с диском, например, при помощи пальцев, вход щих в зацепление с последним.For this, in the well-known combination support, the role of a sliding bearing fulfills a radial-resistant gas-dynamic bearing, the shaft of which is fixed in integral rolling bearings, and the device for transferring the support from one operating mode to another is made in the form of an electromagnet fixed to the body and rigidly fixed on the shaft The magnet of the electromagnet is connected to the disk, for example, with the help of fingers which engage with the latter.

Claims

The drawing shows a combined support section. The shaft 1 of the combined support is installed in one-piece rolling bearings 2, the outer cages of which are fixedly mounted in housing 3 and 4. On the shaft 1 there is a disk 5 with grooves in which palps of the electromagnet 7, pressed by the return spring 8, are inserted. 6, guides 9 are applied, fixed in the housing 10. When starting the electromagnet 7 is applied to the winding, the voltage and the measuring pin 6 are applied to the electromagnet 7 and the rotor 11 is attached to the disk 5. The rotor 11 mounted on the sleeve 12 of the gas-dynamic subsh pkk, rotates with shaft 1 in ball bearings. When the working revolutions are reached, the voltage is removed from the ferrule of the electromagnet 7 and the return spring 8 moves the bore 6 to its initial position, in which it engages with the disk 5. As a result, the shaft brakes sharply and the rotor 11 continues to rotate by inertia. Therefore, in the gap between the shaft and the gas-dynamic bearing bushing, an overpressure is instantly generated. The gas-dynamic bearing bushing floats on the shaft of the combined support and the transition from the rolling mode to the gas-dynamic sliding mode takes place. When the rotor stops, a voltage is applied to the winding of the electromagnet and the rotor runs out on the shaft, which rotates freely in ball bearings, which reduces wear on the surfaces of the gas-dynamic bearing. In the event of an emergency resulting from the seizure of the gas-dynamic bearing, the transfer from the gas-dynamic sliding mode to the rolling mode is carried out by applying voltage to the coil of the electromagnet. This achieves the stability of the operation of the combined support when the gas-dynamic sole is jammed, i.e. increased reliability. Claims of the Invention A combination bearing comprising a shaft supported on a rolling bearing and a sliding bearing and a device for shifting the bearing from the rolling mode to a sliding mode and vice versa, wherein the outer sleeves of the rolling bearings are fixedly mounted in the housing, characterized in that, in order to improve the operating conditions and increase the reliability, the slide bearing shaft is installed in one-piece under the rolling rolling stock, and the device for transferring from one mode to another is accomplished as an electromagnet fixedly mounted and a disk rigidly fixed on the shaft, and the electromagnet measles is connected to the disk, for example, with the help of fingers which engage with the latter.