2results about How to "Reliable recycling" patented technology

The present application provides excavator and energy recovery system of excavator movable arm and bucket based on pump motor, and relates to the technical field of excavator.The energy recovery system comprises a bucket cylinder, a first three-position four-way electromagnetic reversing valve adapted to switch the rod cavity and the rodless cavity of the bucket cylinder to be communicated with the first two-position two-way electromagnetic reversing valve and the second two-position three-way electromagnetic reversing valve respectively, a movable arm cylinder, a second three-position four-way electromagnetic reversing valve adapted to switch the rod cavity and the rodless cavity of the movable arm cylinder to be communicated with the first two-position three-way electromagnetic reversing valve and the second two-position two-way electromagnetic reversing valve respectively, a hydraulic pump adapted to supply hydraulic oil in a hydraulic oil tank to the first two-position two-way electromagnetic reversing valve and the third two-position two-way electromagnetic reversing valve, and a motor drivingly connected to the hydraulic pump.A pump motor is connected between the second two-position two-way electromagnetic reversing valve and the hydraulic oil tank, an electric motor generator integrated machine is drivingly connected to the pump motor, and an energy storage device is electrically connected to the motor and the electric motor generator integrated machine.