Energy recovery and reusing device

Abstract

The invention relates to an energy recovery and reusing device. The energy recovery and reusing device comprises a cargo boom component and a hydraulic system. According to the device, lower pressure oil is converted to high pressure oil which is then stored in an energy accumulator when a cargo boom descends, and when the cargo boom ascends, the high pressure oil is supplied so that the cargo boom can ascend. The full hydraulic system is utilized, potential energy generated during descending of the cargo boom is converted to pressure energy of fluids, the pressure energy is stored in a hydraulic accumulator and used for lifting heavy cargos next time, and the potential energy obtained by power consumption can be regenerated so that loads and power for driving a main hydraulic pump can be reduced. The energy recovery and reusing device has the advantages that the recovery and regeneration efficiency is high, effects on energy conservation and emission reduction are remarkable, the device is simple, and convenient and easy to operate, investments are small, the service life is long, and the device can be configured on a newly produced machine or added to an old transformed machine, and can be widely applied to large engineering machinery such as excavating machinery, loading equipment and hoisting equipment.

Description

technical field [0001] The invention relates to an energy recovery and reuse device, in particular to an energy recovery and reuse device for the self-weight potential energy of a boom. Background technique [0002] Due to the characteristics of wide application, large quantity, high fuel consumption, and poor emission, construction machinery has become one of the goals to be explored and pursued by domestic and foreign construction machinery researchers to achieve high efficiency and energy saving. At present, the research on energy saving of construction machinery system is mainly carried out from two aspects: the research on energy saving based on system control strategy and control method and the research on energy saving based on system structure. Energy-saving research based on system structure includes energy-saving research based on valve control system improvement, power source system improvement, and energy recovery. Energy-saving research on construction machiner...

AI Technical Summary

Problems solved by technology

Because the self-weight of the hydraulically driven boom is very large, the potential energy generated by it is also very large, and the hydraulic energy generated thereby is also relatively large. In the prior art, such as CN202056123U, it discloses a kind of potential energy that utilizes the self-weight of the boom Recovery of accumulators, but the problem is that the combination of energy recovery and the main hydraulic circuit cannot be realized, and the coordination of the system is poor

In addition, CN101408213 discloses a hybrid construction machinery accumulator-hydraulic motor energy recovery system, which mainly uses a set of complex electrical conversion equipment such as frequency conversion motors, rectifiers / inverters, and pressure sensors. The process is complicated and the cost is high, which is not conducive to application

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