THE HYDRAULICALLY CONTROLLED VALVE DISTRIBUTOR OF HYDRAULIC SYSTEMS, ESPECIALLY OF CENTRAL LUBRICATION SYSTEMS WITH VISCOSE OILS AND PLASTIC GREASES

摘要

Hydraulically controlled distributor for hydraulic and lubricating circuits, especially for systems of central loss lubrication with viscous oils and greases, the distributor comprising a body (1) at least comprising one supply channel (P) and one working channel (A) terminating in a valve chamber (12) to supply the hydraulic fluid from the supply channel (P) to at least one working channel (A), and with at least one of the piston (2) slidably arranged in the valve chamber (12), and further comprising at least two control chambers (X, Y) arranged on opposite sides of the piston (2) for controlling the movement of the piston (2) in the distributor. Said at least two control chambers (X, Y) are connected to a bi-directional pump (3) to increase the pressure in one of the control chamber and to reduce the pressure at least in the area associated with the second one of the control chambers, wherein in order to change the position of the piston (2) at least a portion of hydraulic fluid is pumped from one control chamber (X) to the other control chamber (Y) to induce a pressure gradient between the two controllers chambers (Y, X), which gives a piston piston (2) in motion, in the direction of the increasing pressure in the control chamber (Y) to the decreasing pressure in the control chamber (X), wherein by a proper running direction of the pump (3) the piston is moved to the desired direction for controlling the flow of the hydraulic fluid through the distributor.