MODULAR DISTRIBUTOR WITH AT LEAST TWO UNITS FOR CONTROLLING THE OPERATION OF AT LEAST TWO HYDRAULIC ACTUATORS OF AN EARTH-MOVING MACHINE Russian patent published in 2022 - IPC E02F3/84 E02F9/22 

FIELD: mechanical engineering.

SUBSTANCE: invention relates to a unit for controlling the operation of a hydraulic actuator connected with an earth-moving machine. Unit for controlling the operation of a hydraulic actuator comprises a body containing a spool chamber with a load measurement channel, a spool located in the axial direction and at least partially inside the spool chamber, a pair of electrohydraulic spool drives located on the second end of the body, a pair of spool drives positioned parallel and adjacently, wherein the pair of spool drives are intended for the axial displacement of the spool inside the spool chamber, and an inlet chamber parallel to the spool chamber and in fluid communication with the spool chamber through the inlet channel of the spool. The spool therein is spring-loaded with an end cover located on the first end of the body. The inlet chamber therein forms an inlet and has a pressure compensation hydrostatic release unit and a load check valve, placed therein selectively. The hydrostatic release unit has a shutoff element movable between the position of locking the flow and the position the opening the flow of fluid from the inlet as a result of the difference in the fluid pressures between the inlet channel of the spool and the load measurement channel; a shutoff element displaced by a first spring located between the first end of the shutoff element and the first plug located in the end hole of the inlet chamber. The load check valve is displaced in the axial direction toward the second end of the shutoff element by a second spring clamped between the bearing surface of the load check valve and the second plug located in the other end hole of the inlet chamber. The other end hole of the inlet chamber is therein located in the opposite direction from the end hole of the inlet chamber.

EFFECT: distributor with an optimal positioning of valves and actuators, increase in the piping.

8 cl, 8 dwg