Hydraulic machine

The invention relates to a hydraulic machine. The boom actuator includes a large chamber and a small chamber. The recovery unit receives the fluid discharged from the large chamber and then recovers energy. And the recovery pipeline is connected with the large chamber and the recovery unit. An accumulator is connected to a first point on the recovery line. A discharge valve is disposed on the recovery line between the first point and the recovery unit. A first sensor measures the pressure in the accumulator. A controller controls opening and closing of the discharge valve. The controller performs the following anti-bounce control: determining a target pressure in the accumulator according to a predetermined correspondence relationship, the target pressure corresponding to a load pressure applied by a load to a fluid in the large chamber; and controlling opening and closing of the discharge valve such that the pressure in the accumulator measured by the first sensor reaches a target pressure. 本发明涉及一种液压机。动臂致动器包