非道路移动装备高能效电驱液传技术新进展

doi:10.3901/JME.2023.20.385

摘要/Abstract

摘要： 双碳背景下，电驱动方式成为有效解决非道路移动装备碳排放与能源浪费问题的重要途径。然而，目前的电驱方式仅仅是用电池和电动机取代了内燃机，液压系统仍沿用集中式动力源供能、多路阀分配动力的阀控方式，存在系统能量转换、传递效率低的不足，需要大容量的电池组满足工作时长的需求，导致成本高，制约其推广应用。因此，提升液压系统的能效成为破解非道路移动装备电动化技术瓶颈的关键所在。对数字变排量泵技术、离散数字液压阀技术、浮杯泵技术，国际上三种显著提升液压系统能效的方法、研究进展、应用效果进行了分析和论述。进一步对团队所提出的电气液压双动力驱动重载直线执行器的工作原理、能效特性和应用效果进行介绍，所介绍的四种新型传动方式和现有技术对比，普遍可提高能效50%以上，为电动化非道路移动装备的推广应用奠定了基础。

关键词: 数字变排量泵, 离散数字液压阀, 浮杯泵, 电气液压双动力驱动

Abstract: Under the dual-carbon background, electric drive becomes an important way to solve the problem of carbon emission and energy waste of non-road mobile equipment. However, the current first-generation electric drive machine only replaces the combustion engine with batteries and motors. Hydraulic system is still using the valve control mode that centralized power supply energy, multi-way valve distributes the power. The existing technology has the disadvantages of system energy conversion and low transfer efficiency. Need to use a large capacity battery to meet the needs of the machine working hours, which also leads to the high cost of the machine, restricting its application. Therefore, improving the energy efficiency of hydraulic system becomes the key to break the bottleneck of electrification technology of non-road mobile equipment. This paper analyzes and discusses the latest international methods, research progress and application effect of digital variable displacement pump, discrete digital hydraulic valve and floating cup pump which can significantly improve the energy efficiency of hydraulic system. Finally, the working principle, energy efficiency characteristics and application results of the teams proposed electric-hydraulic dual-drive heavy-duty linear actuator are introduced. Compared with the existing technology, the four new transmission modes can increase the energy efficiency of the system by more than 50%, which lays a foundation for the popularization and application of the electric non-road mobile equipment.

Key words: digital variable displacement pump, discrete digital hydraulic valve, floating cup pump, electric-hydraulic dual-drive

中图分类号:

TH137

权龙, 闫志鑫, 章硕峰, 杨雨鑫, 葛磊, 李泽鹏. 非道路移动装备高能效电驱液传技术新进展[J]. 机械工程学报, 2023, 59(20): 385-400.

QUAN Long, YAN Zhixin, ZHANG Shuofeng, YANG Yuxin, GE Lei, LI Zepeng. New Progress in Energy-efficient Electrical Drive and Hydraulic Transmission Technologies for Non-road Mobile Equipment[J]. Journal of Mechanical Engineering, 2023, 59(20): 385-400.

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