Pressure transformer

A hydraulic pressure transformer for the conversion of a hydraulic power from a first fluid flow having a first pressure into the hydraulic power of a second fluid flow having a second pressure by supplying or discharging a third fluid flow having a third pressure comprising a housing having at least three pipe connections for the connection of the fluid flows with the hydraulic pressure transformer, a rotor freely rotatable in the housing around a rotation shaft, chambers distributed around the rotation shaft and provided with displacement means coupled to drive means for during rotation of the rotor moving the displacement means relative to the chambers thereby varying the volume in the chambers between a minimum and a maximum value, said displacement means exerting a force on the rotor depending on the pressure in the chamber, said force creating a driving torque on the rotor depending on the rotative position of the chamber relative to the drive means, and channels provided with valves activated by the rotation of the rotor and alternately connecting each chamber with one of the pipe connections, characterized in that adjusting means are provided for adjusting the rotative position of the drive means with respect to an opening position of the valves.