Research on the Characteristics of Wheel Loader Boom Driven by the Electric Hydraulic Hybrid Drive System

doi:10.3901/JME.2023.07.041

Abstract

Abstract: Wheel loaders are widely used in construction, rescue, disaster relief, and other areas that affect the people's livelihood. Hydraulic system is commonly used to drive and transmit power, but the energy efficiency of the system is low. Moreover, there is a lot of gravitational potential energy wasted in the process of loading and unloading cargo, which increases the fuel consumption and carbon emissions of the whole machine. To address the above problems, the high energy efficiency of electro-mechanical actuator and the high energy recovery efficiency of hydraulic cylinder-accumulator is integrated, and an electro-hydraulic dual-source hybrid driven system is proposed, which uses electro-mechanical actuator to control the system motion and hydraulic cylinder-accumulator to balance the external load force of the system and recover the gravitational potential energy of the system. According to the working principle of the electro-hydraulic dual-source hybrid driven system, the system is analyzed theoretically; The test platform of the proposed system is further built, the power ratio of the electro-hydraulic hybrid drive system is optimized, and the working and energy consumption characteristics of the system are clarified. The test results show that compared with the original valve-controlled system, the proposed system can reduce energy consumption by 51.7% and peak power by 59.6% under the same working conditions. The research results have a positive effect on the realization of the visionary goal of "double carbon" strategy in the field of construction machinery.

Key words: electric hydraulic dual-source hybrid drive, electric cylinder, energy recovery, wheel loader lifting device

CLC Number:

TH137

WANG Xiangyu, HAO Yunxiao, QUAN Long, GE Lei, LIU Huakun. Research on the Characteristics of Wheel Loader Boom Driven by the Electric Hydraulic Hybrid Drive System[J]. Journal of Mechanical Engineering, 2023, 59(7): 41-51.

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