Excavator movable arm series connection type hybrid power system based on double fly wheels

Abstract

The invention discloses an excavator movable arm series connection type hybrid power system based on double fly wheels. A prime motor is connected with a first hydraulic pump. A port P of the first hydraulic pump is connected with a port P of a first hydraulic motor through a first one-way valve. The first hydraulic pump is connected with a second hydraulic pump sequentially through a one-way clutch, a first speed changer, a first clutch, the first fly wheel, a second clutch and a second speed changer. A port S and a port P of the second hydraulic pump are connected with an oil tank and a portP of a main reversing valve correspondingly. A port A and a port B of the main reversing valve are connected with a rod cavity and a rodless cavity of a movable arm hydraulic cylinder correspondingly. A port T of the main reversing valve is connected with a port P of the second hydraulic motor. A port T of the first hydraulic motor and a port T of the second hydraulic motor are connected with theoil tank. The second hydraulic motor is connected with a second gear sequentially through a third clutch, the second fly wheel, a fourth clutch and a third speed changer. The first gear sleeves a shaft between the one-way clutch and the first speed changer and is engaged with the second gear. The system can conduct energy recycling and reutilizing.

Description

technical field [0001] The invention belongs to the technical field of hydraulic transmission, and in particular relates to a series hybrid power system of excavator arms based on double flywheels. 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 ...

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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