Affiliation:
1. Energy and Power Engineering College, Lanzhou University of Technology, Lanzhou 730050, China
2. School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Abstract
The potential energy recovery of hydraulic excavators is very significant for improving energy efficiency and reducing pollutant emissions. However, the more common solutions for potential energy recovery require more energy conversion processes before these potential energies can be reused, which adds to the complexity and high cost of the system. To tackle the above challenges, we proposed a novel energy recovery system for hydraulic hybrid excavators based on the digital pump with an energy recovery function. The new system could operate in three different modes: pump, energy recovery, and direct reuse. Based on the descriptions of the working principle of the digital pump and the whole energy recovery system, the mathematical models of the digital pump, the excavator arm cylinder, and the accumulator were established and the AMESim simulation model (combining mechanics, hydraulics, and electrics) was developed. The dynamic characteristics of the energy recovery system were studied under no-load and full-load conditions. The simulation results showed that this scheme could achieve 86% energy recovery when the boom was lowered and reused the recovered energy directly when raised, which could decrease the system input energy by 78.1%. This paper can provide an optimized solution for construction machinery or off-road vehicles and presents a reference for the research on digital hydraulics.
Funder
National Key R&D Program of China
Subject
Energy (miscellaneous),Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electrical and Electronic Engineering,Control and Optimization,Engineering (miscellaneous),Building and Construction
Reference22 articles.
1. Progress and Trend of Construction Machinery Intelligence;Yang;Constr. Mach. Technol. Manag.,2017
2. Vukovic, M. (2014, January 24–26). An Overview of Energy Saving Architectures for Mobile Applications. Proceedings of the 9th International Fluid Power Conference (9th IFK), Aachen, Germany.
3. Research Progress on Key Technologies of Electric Construction Machinery;Lin;Chin. Hydraul. Pneum.,2021
4. Development of electric construction machinery in China: A review of key technologies and future directions;Tong;J. Zhejiang Univ. Sci. A,2021
5. Research Progress of Energy Regeneration and Utilization System for Hydraulic Excavator;Liu;Chin. Hydraul. Pneum.,2018
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