HYDRO-DRIVEN POWER UNIT FOR INSTALLATIONS OF WATER-JET CUTTING Russian patent published in 2011 - IPC F15B3/00 

FIELD: machine building.

SUBSTANCE: unit consists of hydro-system with main and auxiliary pumps, of at least one accumulator and of two multipliers of one-side action. Each multiplier is made with a chamber of process water replacement and with a hydro-cylinder with a working cavity and return cavity connected to a pressure line of the auxiliary pump. Also, the multiplier is equipped with a system of pre-emptive filling the working cavity of the hydro-cylinder entering the cycle of pressurisation with fluid from an accumulator shut off the pressure line of the main pump during filling. The main line is kept on to be connected with the working cavity of the hydro-cylinder completing the pressurisation cycle.

EFFECT: reduced pulsation of pressure and elimination of receiver.

3 cl, 4 dwg