SU258794A1 - MULTI-POSITIONAL HYDRO DISTRIBUTOR - Google Patents

Description

The invention relates to a machine tool industry and mechanical engineering, can be used in hydraulic actuators that control several executive bodies.

A multi-directional valve is known, consisting of several spools (by the number of controlled organs), which are actuated from one spool with a handle only in a certain sequence.

The presence of several spools, in addition to the basic design, complicates the design, increases the size of the hydraulic distributor, makes it difficult for the hydraulic system to relieve pressure from the middle position of the spools, and limits the number of actuators controlled by the hydraulic distributor.

In the proposed valve, in order to increase its reliability, the spool sleeve is rotatable relative to the stationary body and connected to the handle of the axial movement of the spool, with which it is installed in certain fixed positions, in each of which the working fluid is fed to one specific actuator.

in fig. I; in fig. 4 is a cross section through B - B in FIG. one.

The main parts of the hydraulic distributor - body /, sleeve 2, spool 3, handle 4,

with which the valve 3 is moved to the working position, and the sleeve 2 is rotated at a certain angle. The automatic return of the spool to the middle position after removal of the force from the handle occurs with the help of springs 5, fixing the position of the rotary sleeve 2 relative to the stationary body / - with the help of a ball retainer 5.

The valve works as follows

in a way.

On the average polishing, the spool 3 blocks the liquid supply to the cavities 7 and 8, as well as the discharge of liquid from them. The liquid coming from the pump through the cavities 9 and 10 freely goes to the drain. The hydraulic system is relieved by pressure.

When the slide is moved to the left, channel 9 overlaps; the liquid coming from the pump from the cavity W penetrates into the cavity 7 and through the opening 11 in the housing to the actuator. From there, the fluid through the hole 12 in the housing, the cavity 8, which is connected to the cavity 13, and the ear drainage channel. After removal of the force from the handle 14, the spool returns to the middle position by the springs 5. A relatively fixed body, in the body of which there are supply and discharge openings, a turning sleeve 2 occupies a number of fixed positions, in each of which the fluid is supplied to one specific executive to the body. The axial pressure spool is unloaded with the aid of cavity 15, through which fluid from both end cavities is drained off. Cavities 10 and 15 are interconnected by channel 16. Subject of the invention Myogopozitsioppy valve with spring-loaded spool moved axially in the spool sleeve, integrated into the stationary housing of the hydraulic distributor with openings for supplying and discharging working fluid to the spool and actuators, different In order to increase the reliability of the control valve, the spool sleeve is made rotatable relative to the fixed housing and connected to the handle axial movement of the spool, by which it is installed in certain fixed positions, in each of which the working fluid is supplied to one specific actuator.

FIG.

sixteen

FIG. if