HYDRAULIC SYSTEM FOR ALIGNMENT OF HYDRAULIC DRIVE OF DEVICE FOR TRANSFER OF PRESSURE MEDIUM FROM ONE SYSTEM TO ANOTHER WITHOUT CONTACT OF MEDIUMS Russian patent published in 2009 - IPC F15B3/00 

FIELD: machine building.

SUBSTANCE: system is intended for pumping of fluid mediums with widely changing physical-mechanical properties, for instance gas, gas liquid substances, drilling fluids, oil. System comprises two identical working hydraulic cylinders, stems of which are connected to appropriate stems of two identical driven hydraulic cylinders, cavities of which are communicated by hydraulic lines with creation of closed system of working fluid circulation with reverse controlled pump, which includes system of reversal and control of pump displacement communicated to stem, and make-up pump with system of make-up to closed system of working fluid circulation, at that it is equipped with system of alignment for pistons of driven hydraulic cylinders, at that stem cavities of driven hydraulic cylinders are connected between each other, and piston cavities - to appropriate inlet-outlet of reverse controlled hydraulic pump, at that alignment system includes make-up hydraulic cylinder, one of cavities of which is connected to piston cavity of one of driven hydraulic cylinders, and the second one - to line that connects stem cavities of driven hydraulic cylinders, and alignment valves installed in piston covers of driven hydraulic cylinders, every of which performs double function -double-sided check valve and dynamic valve.

EFFECT: increased reliability.

2 dwg