SU1541422A1

SU1541422A1 - Hydraulic positional actuator

Info

Publication number: SU1541422A1
Application number: SU884419756A
Authority: SU
Inventors: Валентин Сергеевич Сидоренко; Андрей Георгиевич Шуваев; Андрей Михайлович Николенко; Игорь Владимирович Богуславский
Original assignee: Ростовский-На-Дону Институт Сельскохозяйственного Машиностроения
Priority date: 1988-05-03
Filing date: 1988-05-03
Publication date: 1990-02-07

Abstract

Изобретение относитс к гидроприводам и может быть использовано в станкостроении дл точного останова поворотно-делительных механизмов в заданной координате. Цель изобретени - повышение надежности и точности позиционировани путем предварительного торможени с последующим запиранием сливной гидролинии и предотвращени упругого отскока выходного звена в момент остановки. При подходе к точке позиционировани , менее чем за один оборот выходного звена 4 до останова переключаетс клапан 7, обеспечивает подвод рабочей жидкости к входу 20 гидрораспределител 5, а также в управл ющую полость 17 аппарата 8. При этом поршень 11 смещаетс вправо (по чертежу), сжима пружину 14. Запорное устройство 10 под действием пружины 15 прикрывает проходное сечение дроссел 9, обеспечива предварительное торможение гидродвигател (ГД) 3 за счет дросселировани в сливной гидролинии 2. При совмещении входа 20 и выхода 22 рабоча жидкость по гидролинии 21 поступает в управл ющую полость 18. Запорное устройство 10 полностью перекрывает слив из ГД 3, останавлива вращение выходного звена 4. Упругий отскок звена 4 в момент останова не возникает, т.к. обратный клапан изолирует ГД 3 от воздействи противодавлени в гидролинии 2. 1 ил.The invention relates to hydraulic actuators and can be used in machine tools to precisely stop the rotation-dividing mechanisms in a given coordinate. The purpose of the invention is to increase the reliability and accuracy of positioning by pre-braking, followed by locking the drainage line and preventing an elastic rebound of the output link at the moment of stopping. When approaching the positioning point, less than one turn of the output link 4 before stopping, valve 7 switches, supplying the working fluid to the inlet 20 of the hydraulic distributor 5, as well as to the control cavity 17 of the apparatus 8. At the same time, the piston 11 is shifted to the right (according to the drawing) , compressing the spring 14. The locking device 10 under the action of the spring 15 covers the flow area of the throttles 9, providing preliminary braking of the hydraulic motor (DG) 3 due to throttling in the drain of the hydraulic line 2. When the input 20 and the output 22 of the working fluid in the combination of g and the line 21 enters the control cavity 18. The locking device 10 completely blocks the drain from DG 3, stopping the rotation of the output link 4. Elastic rebound of link 4 at the moment of stopping does not occur, since the check valve isolates the HD 3 from the influence of the back pressure in the hydroline 2. 1 sludge.

Description

Изобретение относитс к области ашиностроени , в частности к гидро- риводам исполнительных механизмов, и может быть использовано, например, в станкостроении дл точного останова поворотно-делительных механизмов в заданной координате.The invention relates to the field of ash engineering, in particular, to hydraulic actuators of actuators, and can be used, for example, in machine tool construction to precisely stop the rotation-dividing mechanisms in a given coordinate.

Целью изобретени вл етс повышение надежности и точности позицио- п нировани путем предварительного торможени с последующим запиранием сливной гидролинии и предотвращени упругого отскока выходного звена в омент остановки.25The aim of the invention is to improve the reliability and accuracy of positioning by pre-braking, followed by locking the drainage line and preventing the elastic rebound of the output link to the stop oment.

На чертеже представлена приниципи- зльна гидравлическа схема привода. Гидравлический позиционный привод содержит напорную и сливную гидролинии 1 и 2, гидродвигатель 3 с выходным звеном 4, кинематически св занный с крановым дросселирующим гидрораспределителем 5, направл ющий двухпози- ционный гидрораспределитель 6, элек- троуправл емый клапан 7, гидроуправ- л емый аппарат 8, включающий регулируемый дроссель 9,и запорное устройство 10, поршень 11, винты 12 и 13, пружины 14 и 15. Запорное устройство 10 расположено в кррпусе 16 с обра- ... зованием двух управл ющих полостей 17 и 18, одна из которых гидролинией 19 св зана с входом 20 кранового гидрораспределител 5, а друга - гидролинией 21 с его выходом 22. Гидро- 45 распределитель 6 подключен к гидро- пвигателю 3 гидролини ми 23 и 24, а в сливной гидролинии 2 установлен об- ттный клапан 25.The drawing shows a conventional hydraulic drive circuit. The hydraulic position drive contains pressure and drain lines 1 and 2, a hydraulic motor 3 with an output link 4, kinematically connected with a crane throttling valve 5, guiding the two-position hydraulic valve 6, an electrically-controlled valve 7, a hydraulic control device 8, including an adjustable throttle 9, and a locking device 10, a piston 11, screws 12 and 13, springs 14 and 15. The locking device 10 is located in the bolt 16 with the formation of two control cavities 17 and 18, one of which is hydroline 19 connected to the entrance 20 m crane Hydraulic distributor 5, and the other - hydraulic line 21 to its output 22. Hydro 45 connected to distributor 6 hydro- pvigatelyu 3 Lines 23 and 24, and a discharge line 2 is ob- ttny valve 25.

Привод работает следующим образом. В зависимости от требуемого направлени вращени выходного звена 4 гидрораспределитель 6 устанавливаетс в необходимое положение. Рабоча жидкость из напорной гидролинии 1 подводитс к гидродвигателю 3, например, по гидролинии 23 и приводит его в движение . Слив и-з гидродвигателл 3 осуществл етс по гидролини м 24 и 2 че35The drive works as follows. Depending on the desired direction of rotation of the output link 4, the valve 6 is set to the desired position. The working fluid from pressure line 1 is supplied to the hydraulic motor 3, for example, by line 23 and sets it in motion. Drainage of hydraulic engines 3 is carried out along hydraulic lines 24 and 2 through 35.

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Claims

cut valve 6 and apparatus 8. Control cavities 17 and 18, hydraulic lines 19 and 21, cavities (not shown) of the hydraulic distributor 5 also communicate with drain hydraulic line 5. The frequency of rotation of the output even 4 is determined by the conductivity of the throttles 9, which is adjusted by moving the screw 12 in the piston 11, the locking device 10, which interacts with the spring 15, is displaced. When approaching the positioning point, less than one turn of the output link 4 before stopping, the solenoid valve 7 is activated, which bakes the supply of working fluid to the inlet 20 of the hydraulic distributor 5 and into the control cavity 17. At the same time, the piston 11 is displaced to the right (according to the drawing), compressing the spring 14. The locking device 10 under the action of the spring 15 covers the flow area of the throttle 9, providing preliminary braking of the hydraulic motor 3 for by throttling in the drain hydroline 2. When the inlet 20 and the outlet 22 of the hydraulic distributor 5 are combined, the working fluid enters the control cavity 18 by the hydroline 21. The locking device 10 completely blocks the drain of the hydraulic engine 3 , stopping the rotation of the output link 4. The elastic rebound of the output even 4 does not occur at the moment of stopping, since the check valve 25 isolates the hydraulic motor 3 from the effect of the back pressure in the hydroline

2. Subsequent switching off of the electromagnet (not shown) of the valve 7, the control cavities 17 and 18, the hydraulic lines 19 and 21, the inlet 20 and the outlet 22 of the control valve 5 are unloaded to the drain. The drive is ready for the next positioning cycle. Invention Formula

A hydraulic position actuator containing a pressure and drain lines, a hydraulic motor with an output link, kinematically connected to a crane throttling hydraulic distributor, a guide valve connected to the pressure and drain hydrolines and a hydraulic motor, an electrically controlled valve connected to a pressure and drain valve and a hydraulic motor, a controlled valve connected to the pressure and drain valve and a hydraulic motor connected to a pressure and drain valve and a hydraulic motor connected to a pressure and drain valve connected to a pressure and drain valve and a hydraulic motor connected to a pressure and drain valve and a hydraulic motor connected to a pressure and drain valve and a hydraulic motor connected to a pressure and drain valve and a hydraulic motor connected to a pressure and drain valve and a hydraulic motor connected to a pressure and drain valve and a hydraulic motor connected to a pressure and drain valve and a hydraulic motor connected to the pressure and drain valve and hydraulic motor. and crane throttling valve, hydraulically controlled device installed in the drainage line, including an adjustable throttle and locking device, located zhennoe in the casing to form two actuating cavities, one of which is coupled to an input of the crane valve, of m and n and h

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in order to increase the reliability and accuracy of positioning by pre-braking with subsequent locking of the drain hydroline and prevention of the elastic rebound of the output branch at the moment of stopping, the actuator is equipped with a check valve installed in the drain hydroline between the directional valve and the hydraulic valve control device, the second control cavity of which is connected to the outlet of the crane valve, while the guide valve is two-way.