SU1295044A1 - Hydraulic drive - Google Patents

Abstract

The invention is mb, used in machine-tool construction in hydraulic drives of small feeds. - The purpose of the invention is to increase the efficiency and reliability in operation by reducing the leakage of working fluid (RJ). A non-return valve 9 is connected to the operating rodless cavity 3 of hydraulic engine 1, the output of which is connected to line 10 of the track spool (PP) P. Line 12 PZ 11 is connected to distributor 6, and line 13 is connected to the rod cavity 2 of hydraulic engine 1. When to the working feed, the check valve 9 is closed by RJ pressure from the side of cavity 2, the compartment by the PZ 11 from cavity 3 itself. The RJ drainage from cavity 3 is performed only through the flow regulator 8, which eliminates the RJ leakage through PZ 11, performed with positive overlap working edges, 1 zp f-ly, 1 ill. (L

Description

This invention relates to hydraulic actuators and can be used in machine tool construction in low feed hydraulic drives.

The purpose of the invention is to increase the efficiency and reliability of operation by reducing the leakage of the working fluid.

The drawing shows a diagram of the hydraulic drive.

The hydraulic drive contains a hydraulic drive-. Body 1 with rod 2 and rodless 3 cavities that communicate with power supply 4 and drain 5 through a three-position valve 6. At the outlet of cavity 3, which is working, parallel are installed non-return valve 7 and flow regulator 8. To the cavity 3 through the additional check valve 9 is also connected to the line Yu three-way valve slide 11 with a positive overlap of the working edges. Line 12 of the spool is communicated with the distributor 6, and line 13 - with the cavity 2 of the hydraulic motor 1, which communicates with the spool 11 through the stop 14. The distributor 6 is controlled by electromagnets 15 and 16.

The hydraulic actuator works as follows.

In the middle position of the distributor 6, both cavities 2 and 3 of the hydraulic engine 1 are connected to the drain 5.

In order to carry out a fast approach, the distributor 6 is shifted to the extreme left position (working position is the right position of the distributor 6). The oil from the power source 4 is directed to the thrust cavity 2 of the electric motor 1, from which the rodless cavity 3 is drained via a check valve 9, a valve spool 11, a flow regulator 8 and a distributor 6.

When moving down the spool 1 when interacting with the stop 14, the hydraulic engine brakes. Editor A. Petrov

Compiled by E. Aybinder

Tehred A. Kravchuk Proofreader M. Sharoshi

Order 598/38 Circulation 640 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Design, And

l 1, since the flow area of the gold {11 11 is reduced, in the lower position of the spool 11, the connection of line 10 to the line 12 first overlaps, and then the output of the check valve 9 is connected to the rod end 2 of the hydraulic motor 1 via the line 13 of the valve 11.

In this case, the check valve 9 is closed by the oil pressure on the side of the rod end 2 and the working flow of the hydraulic motor 1 starts, in which the oil from the rodless cavity 3 is forced out to drain only through the flow regulator 8. The check valve 9, disconnecting the cavity 3 from the spool 11, eliminates leakage of oil through the latter.

To effect a quick retract, the dispenser 6 is shifted to

25

thirty

Claims (2)

extreme right position. Invention Formula 1. A hydraulic actuator containing a hydraulic breaker, the stem and shaftless cavity of which is in communication with the power source and drain through a three-position valve, a check valve and a flow controller parallelly installed at the outlet of the working cavity, and connected to the last track spool that differs from in order to increase efficiency and reliability by reducing leaks, it contains an additional (check valve) whose inlet is connected to the working cavity made rodless and the output to one of the track spool lines, friend of which is communicated with the rod cavity with 40 45 2. The hydraulic actuator according to Clause I., of which is that the track slide is made with a positive overlapping working edges.