Improvement in hydraulic circuit for control of the force performance of cylinder rollers, pressure regulating valve and the hydraulic directional control

摘要

"Improvement in hydraulic circuit for control of the force performance of cylinder rollers, pressure regulating valve and the hydraulic directional control.The present invention relates to improvement developed in hydraulic circuit to drive linear actuators which exert compressive force.A novel pressure regulating valve and a directional control hydraulic mounted with the pressure regulating valve.The hydraulic circuit includes a hydraulic cylinder (CH) and a roller compactor (CC) working as opposed and subjected to compression efforts.The hydraulic cylinder (CH) operated by a hydraulic directional control (CD) with a pressure regulating valve actuated by a pilot pressure.The pressure induced in the cylinder telescopic (CH), by taking the works in the area of the main piston of the pressure regulating valve (VRP)In the opposite direction to the force of the spring which maintains the said main piston in its headquarters, and that the force of the spring is adjusted to open only with higher pressure.Which is obtained when a pilot pressure generated in the cylinder compression (DC) is transmitted to the pilot line (LP) which acts on the piston to assist the pressure valve (VRP)Opening the valve and allowing the withdrawal of the telescopic boom (CH). The directional control hydraulic has a directional valve and a pressure regulating valve actuated by a pilot pressure.The pressure regulating valve (VRP) has two pistons.A principal (PT) which receives the pressure induced in one of the cylinders (CH) and an auxiliary (PP) which receives a pilot pressure of the cylinder opposite to and having a spring (ML) which pushes the main piston (PT.) against its headquarters in accommodation (AP).The pressure regulating valve is of the type actuated by a pilot pressure and has two pistons.A principal (PT) which receives the pressure induced one of the cylinders and an auxiliary (PP) which receives a pilot pressure of the cylinder opposite.Having a spring (ML) which pushes the main piston (PT) against its seat on the housing (GG).The pressure regulating valve may be mounted within a hydraulic directional control (CD), and is composed of a plug hollow (TP).In whose interior is located a spring (ML) which pushes the main piston (PT) and a housing (GG) which houses a piston main (PT) and on the opposite side, the piston pilot auxiliary (PP).Alternatively, the pressure regulating valve can be mounted externally to the hydraulic control directional (CD), whose body is a block manifold, being composed of a plug hollow (TP).In whose interior is located a spring (ML) which pushes the main piston (PT) and a housing (GG) which houses a piston main (PT) and on the opposite side of the auxiliary piston (PP).