挖掘机分布式负载口独立阀控系统节能控制研究

发布时间：2018-03-04 17:19

本文选题：挖掘机　切入点：负载口独立　出处：《燕山大学》2016年硕士论文　论文类型：学位论文

【摘要】：近年来,世界能源危机爆发,如何实现节能被各行业所重视。由于存在能量的多次转换,液压系统的能耗较机械、电气系统大,其应用领域正逐渐被其他传动技术所压缩,液压领域的发展趋势是如何降低系统能耗,提高液压系统效率。因此,液压系统在保证高性能、高可靠性要求的基础上,还应该能高效节能。液压行业发展到当今,多数节能技术都通过改善泵的控制特性来实现,如何通过改善阀的特性实现液压系统的节能有待突破,故研究一种能消除重复节流损失的阀来实现节能为液压系统实现节能提供了新途径。本文根据进出口独立控制阀的基本原理,设计了挖掘机负载口独立控制液压系统并研究其节能特性。分别从减小系统压力、消除节流损失、降低泵的排量三方面节能特性,得出不同工况下的节能原理。通过仿真分析可以看出负载口独立控制系统比负载敏感系统更节能。首先在试验台对泵、控制阀组等原件进行性能测试,保证关键元件可以正常工作,然后以XE60CA为实验载体进行节能特性实验。结果表明:在保证各执行机构能够按照既定的动作正常运转的前提下,负载口独立控制系统的节能效果明显优于之前的负载敏感系统,可以显著提高液压系统的效率。本项研究为液压系统的效率提供了一种理论依据,并为负载口独立控制阀的工业化应用奠定理论和技术基础。
[Abstract]:In recent years, the world energy crisis broke out, how to realize energy saving has been paid attention to by various industries. Due to the existence of energy conversion, the energy consumption of hydraulic system is larger than that of machinery and electrical system, and its application field is being gradually compressed by other transmission technologies. The development trend of hydraulic system is how to reduce the system energy consumption and improve the efficiency of hydraulic system. Therefore, hydraulic system should be able to save energy efficiently and save energy on the basis of ensuring high performance and high reliability. Most energy-saving technologies are realized by improving the control characteristics of the pump. How to achieve the energy-saving of hydraulic system by improving the characteristics of the valve needs a breakthrough. Therefore, the study of a kind of valve which can eliminate the repeated throttling loss in order to realize energy saving provides a new way for the hydraulic system to realize energy saving. In this paper, according to the basic principle of the import and export independent control valve, The independent control hydraulic system of excavator load port is designed and its energy saving characteristics are studied, which include reducing system pressure, eliminating throttling loss and reducing pump displacement. The principle of energy saving under different working conditions is obtained. Through simulation and analysis, it can be seen that the independent control system of load port is more energy efficient than the load sensitive system. First, the performance of the pump and control valve group is tested on the test bench. The results show that the key components can work properly, and then the XE60CA is used as the experimental carrier to carry out the energy saving experiments. The results show that: under the premise of ensuring that the execution agencies can run normally according to the established actions, The energy saving effect of the load port independent control system is obviously better than that of the previous load sensitive system, and the efficiency of the hydraulic system can be significantly improved. This study provides a theoretical basis for the efficiency of the hydraulic system. And lay a theoretical and technical foundation for the industrial application of the load port independent control valve.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TU621;TH137

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