초록 ▼

Energy of returning pressurized fluid of an actuator is recovered and reused as energy for operating other accumulators. A first pump motor (16) and a second pump motor (17) are mechanically connected to form a pressure converter (18), and a first circuit (22), to which the returning pressurized flu

Energy of returning pressurized fluid of an actuator is recovered and reused as energy for operating other accumulators. A first pump motor (16) and a second pump motor (17) are mechanically connected to form a pressure converter (18), and a first circuit (22), to which the returning pressurized fluid is supplied, is connected to the first pump motor (16). A pressure accumulator (27) is provided to a second circuit (25) connected to the second pump motor (17). The first circuit (22) is connected to a discharge passage (11) of a primary hydraulic pump (10) by a third circuit (29) and the pressure of a high pressure pressurized fluid is supplied to the discharge passage (11) by the pressure of the high pressure pressurized fluid, and is reused.

대표청구항 ▼

1. A pressurized fluid recovery/reutilization system comprising a primary hydraulic pump supplying a pressurized fluid returned from an actuator, a first circuit supplying the returning pressurized fluid from the actuator, a first pump motor connected to said first circuit, a variable displacement t

1. A pressurized fluid recovery/reutilization system comprising a primary hydraulic pump supplying a pressurized fluid returned from an actuator, a first circuit supplying the returning pressurized fluid from the actuator, a first pump motor connected to said first circuit, a variable displacement type second pump motor mechanically coupled with said first pump motor and connected to a second circuit, a third circuit communicating said first circuit and a discharge passage of said primary hydraulic pump, a pressure accumulator provided in said second circuit, and a reproduction valve switching said third circuit between a state permitting the flow of a pressurized fluid and a state blocking the flow.