Electric recycling and reusing energy-saving device for potential energy of excavator boom

Abstract

The invention provides an electric recycling and reusing energy-saving device for potential energy of an excavator boom. The device comprises a boom (1), a boom hydraulic cylinder (2), a steel wire rope (4), a roller (5), a motor (6), a plurality of sensors, a controller and a battery; the roller (5) and the motor (6) are fixed to an upper turntable of an excavator; and a speed reducer is arrangedin the roller (5); the motor (6) is connected with the speed reducer through a shaft coupling; one end of the steel wire rope (4) is wound on the roller (5), and the other end of the steel wire rope4 is fixed on the boom (1) through a pull rod 3; and the battery is electrically connected with the motor through an inverter. The energy-saving device of the invention is simple in structure, small in size, light in weight, low in cost and high in reliability, the efficiency of a hydraulic system is improved, the heating phenomenon of the hydraulic system of the excavator due to oil temperature rise is avoided, the specification of radiator equipment arranged in the system is reduced, and the obvious energy-saving effect is achieved.

Description

technical field [0001] The invention relates to the field of hydraulic transmission and control, in particular to the field of hydraulic engineering machinery, and in particular to an electric recovery and reuse energy-saving device for potential energy of an excavator arm. Background technique [0002] Excavator is a kind of construction engineering machinery, which is widely used in mechanical construction such as water conservancy engineering, transportation, electric power engineering and mining excavation to reduce heavy physical labor and ensure project quality. [0003] In a traditional hydraulic excavator, only 20% of the output power of the engine is converted into the effective power of the excavator. With the increasing shortage of energy and environmental pollution, the effective utilization of energy has become one of the important criteria for evaluating whether an excavator is advanced. During the working process of the hydraulic excavator, the boom lifts fre...

AI Technical Summary

Problems solved by technology

Since the pressure in the lower chamber of the cylinder when the boom is lowered is lower than that when the boom is raised, many hydraulic energy recovery devices now use superchargers to store the pressure in the lower chamber of the cylinder when the boom is lowered, and store it in the accumulator, etc. When the boom rises, the high-pressure oil in the accumulator is released to lift the boom. The supercharger and hydraulic accumulator in this solution are high in cost, large in size and low in reliability

The hydraulic air-filled energy recovery device uses a hydraulic motor to convert the pressure in the lower chamber of the cylinder into mechanical energy when the boom is lowered, and then drives the generator to convert it into electrical energy and store it in the battery. When the boom is raised, the electric motor on the battery is used to convert the electrical energy into mechanical energy Driving the hydraulic pump is converted into hydraulic energy to lift the boom. In this solution, the hydraulic and electrical systems are used at the same time, and the cost is high, the volume is large, and the reliability is low.

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