HYDRAULIC PUMP PLANT Russian patent published in 2003 - IPC

FIELD: general engineering, particularly, self-contained power sources. SUBSTANCE: hydraulic pump plant has power unit, pumping unit connected with tank for working fluid and hydraulic apparatuses. Plant is provided with system for cooling of working fluid and installed in drain line conjugated with working tool. Cooling system may include, at least, two heat exchangers successively connected. EFFECT: provided building up of required pressure and fluid head with preserved heat balance of hydraulic system due to excluded overheating resulting in reduced viscosity of working fluid. 5 cl, 5 dwg