摘要
液压技术的一大优势是可实现单泵多执行器并联驱动,与微电子技术结合,实现机电一体化集成是新型元件和系统的发展方向,研究节能的元件和系统集成方法是这一技术不断完善、保持优势的重要研究课题。首先介绍了目前广泛应用的液压-机械控制多执行器系统原理,分析了他的不足。对由此发展的电液负载敏感控制技术做了分析,给出了流量匹配负载敏感多执行器控制原理的最新研究成果。介绍了应用进出油口独立控制的工程机械回路原理及元件组成,给出了液压泵直接控制的泵控差动缸回路原理、这一技术用于液压挖掘机整机的回路原理,最后指出能量回收技术和混合动力技术将是工程机械电液技术进一步的发展趋势。
One of the most main advantages of fluid power is easy to control muhi-actuators with one centralized power station. Combine with electronic technology, to realize the mechatronics is the development tendency for new components and systems. It is important researching direction to development energy efficient control elements and integrated system methods to make this technology constantly progress and keep its competitive advantages. At first the working principle of hydraulic mechanical load sensing multi-actuators control system is introduced. Disadvantages of hydraulic mechanical load sensing are pointed out Further the electro-hydraulic toad sensing control technology is discussed and analyzed. The up to date achievements that use flow matching method to control multi-actuators are introduced and discussed. Then the elements and system circuits to control mu]ti-actuators with meter in and meter out principle are explained. The circuit schematics of pump controlled differential cylinder are given. The working process of whole hydraulic excavator controlled by pump controlled differential cylinder is explained in detail. At last author point out that the tendency of electro-hydraulic control for mobile machines is energy regeneration and use hybrid technology.
出处
《液压气动与密封》
2010年第1期40-43,46,共5页
Hydraulics Pneumatics & Seals
关键词
电液控制
工程机械
负载敏感
流量匹配
electro-hydraulic control
mobile machine
load sensing
flow match
