A torque-coupled excavator arm potential energy recovery and reuse system

Abstract

The invention discloses a torque-coupled excavator movable arm potential energy recovering and reusing system. An oil outlet P of a hydraulic pump is connected with a P port of a main reversing valvethrough a first check valve, and an A port of the main reversing valve is connected with a rod cavity of a movable arm hydraulic cylinder; a B port of the main reversing valve is connected with an A port of a switching valve, an oil inlet of a second check valve and an oil outlet of a fourth check valve, an oil inlet of the fourth check valve is connected with an A port of a first hydraulic motor,and a P port of the first hydraulic motor, an oil outlet of the second check valve and a P port of the switching valve are all connected with a rodless cavity of the movable arm hydraulic cylinder; the first hydraulic motor is connected with one end of a flywheel sequentially through a one-way clutch and a first clutch, and the other end of the flywheel is coaxially connected with an auxiliary hydraulic pump unit through a second clutch; and an oil outlet B of the auxiliary hydraulic pump unit is connected with an oil inlet P of a second hydraulic motor, and the second hydraulic motor is coaxially connected with a prime motor and the hydraulic pump. The system can recover potential energy of a movable arm and can use the recovered energy for lifting the movable arm.

Description

technical field [0001] The invention belongs to the technical field of hydraulic transmission, in particular to a torque-coupled excavator arm potential energy recovery and reuse system. Background technique [0002] Hydraulic excavators are widely used in various construction fields. Hydraulic excavators have disadvantages such as high fuel consumption and low efficiency. Research on energy saving is imminent. [0003] figure 1 It is a structural schematic diagram of a common excavator arm system at present. Wherein, the end of the boom 100 is hinged on the turntable 200 , the cylinder barrel of the boom hydraulic cylinder 4 is hinged on the turntable 200 , and the piston rod end of the boom hydraulic cylinder 4 is hinged on the middle part of the boom 100 . When the piston rod of the boom hydraulic cylinder 4 performs telescopic movement, the boom 100 can be driven to lift and lower. During the working process of the excavator, the boom lifts frequently, and due to the ...

AI Technical Summary

Problems solved by technology

The hydraulic recovery scheme takes advantage of the accumulator’s high power density and the ability to absorb pressure shocks. However, due to the low density of energy stored in the accumulator, if more energy needs to be stored, a larger accumulator will be required, which in turn will Occupies a large space, and the installation of the accumulator is also very inconvenient

In addition, the pressure of the accumulator will rise with the increase of the stored oil, which will affect the falling speed of the boom

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