A series hybrid power system of excavator boom based on double flywheel

Abstract

A dual-flywheel-based excavator boom series hybrid power system, the prime mover is connected to a first hydraulic pump, and the P port of the first hydraulic pump is connected to the P port of the first hydraulic motor through a first check valve; the first The hydraulic pump is sequentially connected to the second hydraulic pump through the one-way clutch, the first transmission, the first clutch, the first flywheel, the second clutch, and the second transmission; the S port and P port of the second hydraulic pump are respectively connected to the oil tank and the main reversing The P port of the valve is connected, the A port and B port of the main reversing valve are respectively connected with the rod chamber and the rodless chamber of the boom hydraulic cylinder, and the T port of the main reversing valve is connected with the P port of the second hydraulic motor. The T ports of the first hydraulic motor and the second hydraulic motor are connected to the oil tank; the second hydraulic motor is connected to the second gear through the third clutch, the second flywheel, the fourth clutch, and the third transmission in sequence; the first gear is set in the one-way clutch It is on the shaft between the first transmission and meshes with the second gear. The system can recover and reuse energy.

Description

technical field [0001] The invention belongs to the technical field of hydraulic transmission, in particular to an excavator boom series hybrid power system based on double flywheels. Background technique [0002] Hydraulic excavators are widely used in various construction fields. Hydraulic excavators have shortcomings such as high fuel consumption and low efficiency, and their energy-saving research is imminent. [0003] figure 1 It is a schematic diagram of the structure of a common excavator arm system at present. The end of the boom 100 is hinged on the turntable 200 , the cylinder 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 at the middle of the boom 100 . When the piston rod of the boom hydraulic cylinder 4 performs telescopic motion, the boom 100 can be driven to perform lifting and lowering actions. During the working process of the excavator, the boom lifts frequently, and due...

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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