SU1300201A1 - Hydraulic drive - Google Patents

Abstract

Invention m. used in machine tools. The purpose of the invention is to reduce energy losses. Parallel to the main distributor (P) 5, a switching P 6 is installed, connected directly to the rod end 2 of the hydraulic cylinder 1, and to the rodless cavity 3 via the speed regulator 8. P 5 and 6 are performed by three-position four-line and in one of the positions cavities 2 and 3 are interconnected with each other and with source 4 of pressure. In the working feed mode, depending on the position of P b, either the flow or discharge of the working fluid from the corresponding cavity of the hydraulic cylinder 1 is carried out through the regulator 8. The speed of the working feed is regulated by the control spool 11, the control valve is operated one of the throttle regulators 9 or 10 speed controllers 8. 1 il. with (L

Description

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FIELD OF THE INVENTION The invention relates to a mechanical hydraulic drive, namely to a hydraulic drive of a working feed of machine tools.

The purpose of the invention is to reduce energy losses.

The drawing shows a diagram of a gigabyte drive.

The hydraulic actuator contains a hydraulic cylinder with rod and rodless cavities 2 and 3, a pressure source 4, a three-position valve 5 and a switch valve 6, made by track-effect, a drain 7 speed controller 8, made in the form of two throttle regulators 9 and 10 sequentially facing each other and spool 11 control.

Both distributors 5 and 6 are four-line. The cavities 2 and 3 of the hydraulic cylinders 1 are connected to the pressure source 4 and the drain 7 via the distributor 5. The switching valve 6 is connected in parallel to the distributor 5 to the pressure source 4, the drain 7 and the rod end 2 of the hydraulic cylinder 1, and to the rodless cavity 3 of the hydraulic cylinder I through the regulator 8 speeds. Moreover, each of the valves 5 and 6 has a position in which the cavities 2 and 3 of the hydraulic cylinders 1 are connected with each other and with the pressure source 4, and the switching valve 6 is made with a smaller conditional passage than the valve 5..

The hydraulic drive works as follows.

To perform an accelerated stroke, the distributor 5 is included in position 5 in which the liquid from the pressure source 4 enters the continuous cavity 3 of the hydraulic cylinder i, and the liquid displaced from the rod cavity 2 through the distributor 5 also enters the hydraulic rodless cavity 3 of the hydraulic cylinder I (a differential connection is made polo with her hydraulic cylinder a).

For removal of the hydraulic cylinder 1 to the initial position, the distributor 5

VNIIPI Order 1133/34 Circulation 640 Subscription Proizv.-polyr, pr-tie, Uzhgorod, ul. Project, 4

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installed in a position in which the pressure source 4 is connected to the rod end 2 of the hydraulic cylinder, and its cavity 3 is connected to the drain-7.

To implement the working supply of the hydraulic cylinder 1, the switching valve 6 is included either in the right (according to the drawing) position, then the liquid enters the rodless cavity 3 through the speed regulator 8, or in the left (according to the drawing) position, then the liquid enters the rod 2 cavity the cylinders 1 directly through the distributor 6, and out of the rodless cavity 3 through the speed controller 8, in addition, the feed rate is also changed by turning on the control spool 1, which activates the throttle controller 9 or 10.

Formula of Invention

A hydraulic actuator containing a hydraulic cylinder, the rod and rodless cavity of which is communicated through a three-position distributor with a pressure source and a drain, a speed regulator made in the form of two throttle regulators with a control slide, successively facing each other, and a switching distributor the cylinder cavity is associated with a speed regulator, characterized in that, in order to reduce energy losses, the switching valve is designed as a second; a three-position distributor with a smaller flow area than the first one, connected in parallel to the first to the pressure source, drain and rod cavity of the hydraulic cylinder, and to the rodless hydraulic cylinder cavity through a speed controller, both races; the limiter is made four-line and each of them is provided with a position in which the hydraulic cylinder cavities are interconnected with each other and with a pressure source.

Claims (1)

Claim A hydraulic actuator containing a hydraulic cylinder, the rod and rodless cavities of which are communicated through a three-position distributor with a pressure source and a drain, a speed regulator made in the form of two throttle regulators in series with each other and with a control valve, and a switching distributor, and the rodless cavity, the hydraulic cylinder is connected to a speed controller, characterized in that, in order to reduce energy losses, the switching valve is made in the form of a second _; a three-position distributor of a smaller bore than the first, connected in parallel with the first to a pressure source, a drain and a rod cavity of a hydraulic cylinder, and to a rodless cavity of a hydraulic cylinder through a speed controller, both of which are; the limiter is made four-linear and each of them is equipped with a position in which the cavity of the hydraulic cylinder are interconnected and with a pressure source. VNIIIPI Order 1133/34 Draw 640 Subscription Custom polygr. ave, city of Uzhhorod, st. Project, 4