SU1418512A1 - Position hydraulic drive - Google Patents

Abstract

Invention m. B. used in machine tools. Pel of the invention is to improve the positioning accuracy, reliability and speed of the drive through pre-braking. The output link 4 of the hydraulic engine 3 is kinematically connected with the crane hydraulic valve (GR) 5 and hydraulic brake 7. Brake 7 contains a spring 8 and a hydraulic cylinder 9 connected to pressure hydraulic line (CH) I and tank 13 through GR 10, control, 1H1 cavity 23 It is connected to the inlet line 22 of the GR 5. The drain CH 2 has a valve 20, the control cavity 19 is connected to the inlet of the 18 GH 5. At the approach of the link 4 to the given coordinate one revolution before stopping cavity 19 through GG 16 communicates with GL 1, and valve 20 closes GL 2. At the same time, GH, 5 is supplied and supplies working fluid to cavity 23 of GH 10, which informs hydraulic cylinder 9 with the tank, which causes brake 7 to work and link 4 to stop. The intensity of the braking process is pei-y-adjusted by setting valve 20 and brake 7. I silt CQ ate

Description

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; The invention relates to machine building, in particular to hydraulic actuators of actuating mechanisms, and can be used, for example, in machine tool industry to stop and fix the actuator in a given coordinate.

The purpose of the invention is to improve the accuracy of the arrangement, the reliability and speed of the drive by pre-breaking.

cutting the valve 10, pressing the spring 8 and disengaging the brake 7. The output link 4 of the hydraulic engine 3 and the crane valve 5 rotate in the desired direction. When approaching a given coordinate in less than one turn of link 4 before stopping, an electrical signal is disconnected from the control valve 16, which, when switched, reports an additional hydraulic line 21 s.

The drawing shows the principal-10 pressure hydroline 1. As a result,

This hydraulic drive circuit. The pressure in the cavity 19 of the valve 20 increases,

I Hydraulic position drive with overlapping drain line 2.

Holds pressure 1 and drain 2 hydro-Simultaneously, along line 17, the working fluid, the hydraulic motor 3 with an output disk from the pressure hydroline and 1 inlet M 4, kinematically connected to the valve 17 in the control valve 17 of the hydraulic distributor 5.

E | YM hydrodistributor 5. Hydrodvig-With a further rotation of the hydraulic engine 3

1 | spruce 3 is connected to a pressure head and a drain; connection 18 and 22 of the hydrolines is connected through the hydraulic distributor guide 5, which provides sub-valve 6. Hydraulically controlled brake 7, the hydraulic signal to the control

placed with the possibility of interaction-cavity 23 of the hydraulic distributor 10. At the same time

E) and with the output link 4, includes pru-20 working fluid from hydraulic cylinder 9 along

fsina 8 and hydraulic cylinder 9. The hydraulic distribution line I and 12 is discharged into tank 13, such that; | the selector 10 is connected to line 1 to hydraulic 1 | 1 cylinder 9, line 12

causes the brake 7 to operate under the action of the spring 8 and stop the output link 4 at the given coordinate. Subsequent shutdown of the electromagnet

to baku 13 as well

“Line 14 is connected to pressure hydraulic“ IIHHHH 1. In addition, pressure hydraulic 1 is connected to line 15 of hydro- 25 (“g marked)” of hydraulic distributor 6 of limiter 16, the output line 17 of which is preparing water for the implementation of the following is connected to input lines 18 of the crane hydraulic distributor 5, as well as the controllers of the cavity 19 of the hydraulically controlled valve (20 installed in the drain positioning hydrocycle).

The intensity of the braking process, which determines the quality of the positioning, is changed by adjusting valve 20 and

, 1 .. -v, „........, .. -v ..., | -, j to 1У1 pl 1„ l iijiv ivi nai ipv7rii ri with

| 1 lines 2, by means of additional hydraulic selection of brake parameters 7.

Line 21: The output line 22 of the crane valve is connected with the control cavity 23 of the hydraulic distributor 10 kepe3 hydroline 24 and the line 25 of the hydraulic distributor 16, the output line 26 of which is connected to the tank 13.

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Pre-braking with valve 20 leads to an increase in positioning accuracy, increasing reliability by eliminating a sharp increase in pressure in the drain line 2.

Claims (1)

Claim I Hydraulic positional drive works as follows. Hydraulic positional actuator, co. When an electric signal is applied to the holding pressure and drain hydrolines: the directional control valve 6 is working, the hydraulic motor with an output link.m, the liquid from the pressure hydroline 1 kinematically linked to the crane hydraulic input to the hydraulic motor 3. The working fluid is drained from the latter through the hydraulic distributor 6, the drain hydraulic line 2 and the Hydraulically controlled valve 20 by means of With the output to the tank 13. In the absence of pressure in the link, the hydraulic motor of the hydraulic line 21 at the expense of the initial adjustment of the valve 20 is provided with low pressure of the working fluid. In addition, an electrical signal is applied to the valve 16 and the last switch Q and speed by pre-setting — at the position at which the control-braking is applied, the drive is provided with an additional cavity 23 and line 22 with communicated hydroline telling the control tank 13. At the same time The hydraulic cylinder 9 of the valve cavity with the inlet line is connected to the pressure hydraulic line 1 of the four-valve control valve. Compiled by Koval Editor N. BobkovTehreL I. VeresKorrektor V. But ha Order 4141/36 Circulation 652Subscription VNIIPI State Committee of the SS CP for Inventions and Discoveries I3035, Moscow. G-35. Raushska nab., 4/5 Production and Printing Enterprise, Uzhgorod, st. Design. valve, mounted on the drain line, and hydraulic brake, placed from the outlet to the pressure and drain lines through a directional valve, in order to improve positioning accuracy, reliability cutting the valve 10, pressing the spring 8 and disengaging the brake 7. The output link 4 of the hydraulic engine 3 and the crane valve 5 rotate in the desired direction. When approaching a given coordinate in less than one turn of link 4 before stopping, an electrical signal is disconnected from the control valve 16, which, when switched, reports an additional hydraulic line 21 s. pressure hydroline 1. Because of this Line I and 12 is drained into tank 13, which causes the brake 7 to operate under the action of the spring 8 and stop the output link 4 at the given coordinate. Subsequent shutdown of the electromagnet  („G is indicated) of the hydraulic distributor 6, the drive is being prepared for the implementation of the following  („G is indicated) of the hydraulic distributor 6, the drive is being prepared for the implementation of the following positioning cycle. The intensity of the braking process, which determines the quality of the positioning, is changed by adjusting valve 20 and  Po1U1 pl 1 „l iijiv ivi nai ipv7rii ri with selection of brake parameters 7. the ability to interact with the output link, while the hydraulic motor is connected to and speed by pre-braking, the drive is equipped with an additional distributor, a Hydraulically operated valve installed in the drainage line, and a hydraulic actuated brake, with the possibility of interaction with the output link, while the hydraulic motor and speed by pre-braking, the actuator is provided additionally to the pressure and drain hydrolines through a directional distributor, characterized in that spruce enhance the positional accuracy, reliability