SU1649131A1 - Two-way hydraulic lock - Google Patents

Abstract

The invention can be used in hydraulic drives of mobile machines. The purpose of the invention is to improve reliability. The hydraulic lock consists of a housing 1 with command cavities, in a bore 2 of which 25 are mounted. An elastic diaphragm 24 h of projection 11, forming with the diaphragm 24 command cavities by means of grooves 12 13 The diaphragm 24 serves as a stop valve of the main valves, and the auxiliary check valves (FOC) are placed in the bores of the spacer. 11 When supplying the working fluid (RJ) under pressure to one of the drainage channels, for example, channel 3, they open The wok and the command cavities are connected to the drain channel 25. As a result, the outlet supply channel 3 communicates with the working channel 5, and the supply channel 4 leads to the working channel 6 RJ is supplied to the corresponding cavity of the hydraulic cylinder, and from the other cavity by taking RJ 2 or L $ (L o СО CO with

Description

The invention relates to hydraulic machine building and can be used in hydraulic drives of mobile machines.

The purpose of the invention is to increase reliability.

FIG. I shows the hydraulic lock, general view; in fig. 2 is a section A-A in FIG. one.

A two-way hydraulic lock contains a housing 1 with command cavities with a bore 2, with channels 3.4 for supplying and discharging working fluid and working channels 5.6, in which main and auxiliary check valves with shut-off elements 7.8 are placed, and pushers 9.10 .

The hydraulic lock is provided with a cylindrical spacer 11 with two segment grooves 12, 13 and two stepped bores 14, 15, in which they are installed with the formation of overlaid cavities 16, 17 and sub-valve cavities 18, 19 auxiliary valves, whose stop elements are equipped with cores that form the spool pairs, and pushers 9, 10 with the formation of cavities 22, 23 control. The locking elements of the main valves are made in the form of an elastic diaphragm 24 installed in the bore

2cases 1 between the spacer 11 and the housing 1 and forming command cavities with segmental grooves 12, 13 communicated through auxiliary valves with a drain channel 25. At the same time, the first inlet-outlet channel 3 communicates with the subcavity 8 of the first auxiliary valve and the second pusher control cavity 23 10, the second inlet-outlet channel 4 communicates with the subvalvular cavity 14 of the second auxiliary valve and the control cavity 22 of the first pusher 9, and each working channel 5, 6 communicates through a corresponding spool pair 20, 21 and overhead Apan cavity 16, 17 with the corresponding command cavity.

The hydraulic lock works as follows.

In the absence of a control signal, the channels 3, 4 of the approach-outlet are communicated with the drain. Under the action of an external load applied to the rod of the hydraulic cylinder, pressure, for example, through the inlet-outlet channel 3, spool pair 20, and valve valve cavity 16 is transmitted to the command cavity formed by the groove 12, and presses the diaphragm 24 to the housing 1, separating the channels

3 and 5, 4 and 6.

To displace the rod of the hydraulic cylinder, for example, to the right (Fig. 1), the working fluid under pressure through the supply-and-discharge channel 3 is fed into the subvalvular cavity

14 and the control valve cavity 23 of the pusher 10, the auxiliary valves open. The command cavities formed by the slots 12, 13 are connected to the drain channel.

25 and are separated from the working channels 5, 6 by means of spool pairs 20, 21. The diaphragm 24 is pressed by the pressure of the working fluid to the surface of the grooves 12, 13 and communicates the approach-retraction channel 3 with the working channel 5, and the approach-retraction channel 4 channel 6. As a result, through the working channel 5, the working fluid under pressure is fed into the working cavity of the hydraulic cylinder, and from the other working cavity of the hydraulic cylinder the working fluid through the working channel 6 and the inlet-outlet channel 4 is fed to the drain.

The operation of the hydraulic lock when the hydraulic cylinder rod moves to the left (Fig. 1) is similar.

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Claims (1)

Invention Formula A two-way hydraulic lock comprising a housing with command cavities with a bore, two channels for supplying and discharging working fluid and working channels, main and auxiliary check valves with shut-off elements and two pushers placed in the bore of the housing, in order to increase reliability it is equipped with a cylindrical spacer with two segment grooves and two stepped bores, in which auxiliary check valves are installed to form nadklapanny and subglaved cavities Spruce trees with the formation of control cavities, shut-off elements of auxiliary check valves are equipped with plugs that form spool pairs with a spacer bore, the shut-off elements of main valves are made in the form of an elastic diaphragm installed in the bore of the body between the spacer and the body and forming command cavities with segment grooves communicated through auxiliary valves with a drain channel, the first inlet-outlet channel communicating with the subvalvular cavity of the first auxiliary valve and the control cavity and the second cam, the second inlet-ogvoda subvalvular channel communicates with the cavity of the second auxiliary valve and the control cavity of the first pusher, and each working channel is connected through the spool and a pair nadkla- pannuyu cavity auxiliary valve with a corresponding cavity command. FIG. 2